CN115333330B - Circuit and method for ultra-low power consumption standby of personal marine rescue equipment - Google Patents
Circuit and method for ultra-low power consumption standby of personal marine rescue equipment Download PDFInfo
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- CN115333330B CN115333330B CN202210804633.2A CN202210804633A CN115333330B CN 115333330 B CN115333330 B CN 115333330B CN 202210804633 A CN202210804633 A CN 202210804633A CN 115333330 B CN115333330 B CN 115333330B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 63
- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 230000009429 distress Effects 0.000 claims abstract description 23
- 230000002035 prolonged effect Effects 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 47
- 230000002441 reversible effect Effects 0.000 claims description 8
- 230000003111 delayed effect Effects 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- LAUWCWCSEOWJMQ-QRJSTWQJSA-N (e,2s)-2-amino-4-fluoro-3-(3-hydroxyphenyl)but-3-enoic acid Chemical compound OC(=O)[C@@H](N)C(=C\F)\C1=CC=CC(O)=C1 LAUWCWCSEOWJMQ-QRJSTWQJSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
- H02M1/0035—Control circuits allowing low power mode operation, e.g. in standby mode using burst mode control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Telephone Function (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to an embedded circuit technology, in particular to a circuit and a method for ultra-low power consumption standby of personal marine rescue equipment, the circuit comprises a lithium battery, a manual switch, a water touch switch, a reset circuit, a switch circuit, a DC-DC circuit, a controller, peripheral equipment, a proportional amplifier and a cancel emission button. When the manual switch or the water touch switch acts, the controller is electrified, and the system transmits a distress signal. When the signal of canceling the emission is acquired, the controller controls the switch circuit to be closed, the lithium battery voltage can not supply power to the system, and the system stands by. After the water touch switch and the manual switch are not started or the cancel button is pressed, the system is in a standby state, and only the reset circuit with nano power consumption works, so that the standby with ultra-low power consumption is realized while the monitoring distress state is not influenced, and the standby time of the lithium battery is prolonged as much as possible. Compared with the prior art, the invention has simple circuit and can effectively improve the standby time of rescue equipment.
Description
Technical Field
The invention belongs to the technical field of embedded circuits, and particularly relates to a circuit and a method for ultra-low power consumption standby of personal marine rescue equipment.
Background
With the rapid development of economy, the world shipping market is expanded and developed, the sea and Jiang Hehang transportation volume is continuously increased, and the occurrence probability of offshore accidents is increased. The marine rescue belongs to passive rescue, and once marine accidents occur, huge personal casualties and economic losses can be caused. In order to improve the life and property security of people and reduce personnel and property loss caused by distress, corresponding equipment is required to be provided, and distress information and time are effectively transmitted to related organizations when dangerous situations occur. How to reduce the power consumption of the lifesaving system to the maximum extent, reduce unnecessary energy loss and prolong the service life of the battery is a problem which must be considered in the design of the lifesaving equipment.
Traditional starting of the marine rescue indication marks is divided into three types: automatic start, manual start and remote start. The automatic start is when the distress is followed by the automatic float of the device, the pressure is measured, the system is then automatically started, and the device is separated from the float support and is floated on the water surface. The manual starting is to manually operate the keyboard, and after inputting command words, the system is started under the condition of confirming no errors. The remote control start needs to keep the antenna in a state of receiving signals for a long time, and analyze commands of the received signals at any time, so that the remote control start needs to consume a lot of electric quantity. For personal offshore rescue equipment, floating automatic starting is not practical, manual starting is inconvenient, remote starting consumes more power, and other methods are needed to solve the problem.
Disclosure of Invention
Aiming at the problems existing in the background technology, the invention provides a circuit and a method for ultra-low power consumption standby of personal marine rescue equipment.
In order to solve the technical problems, the invention adopts the following technical scheme that the circuit for the ultra-low power consumption standby of the personal marine rescue equipment comprises a lithium battery, a manual switch, a water touch switch, a reset circuit, a switch circuit, a DC-DC circuit, a controller, peripheral equipment, a proportional amplifier and a cancel emission button; the lithium battery is connected with the manual switch, the water contact switch, the reset circuit, the switch circuit and the DC-DC circuit, the reset circuit is connected with the manual switch, the water contact switch, the switch circuit and the controller, the manual switch, the water contact switch, the reset circuit and the proportional amplifier are connected, the switch circuit is connected with the reset circuit and the DC-DC circuit, the DC-DC circuit is connected with the lithium battery, the switch circuit, the controller, the proportional amplifier and the peripheral equipment, the controller is connected with the DC-DC circuit, the peripheral equipment, the cancel emission button, the reset circuit and the proportional amplifier, the peripheral equipment is connected with the DC-DC circuit and the controller, the cancel emission button is connected with the controller, and the proportional amplifier is connected with the manual switch, the water contact switch and the controller.
In the circuit for ultra-low power consumption standby of the personal marine rescue equipment, the voltage of the lithium battery is accessed by J1, the 2 pins are positive pins of a power supply, and the 1 pins and the 3 pins are grounded.
In the circuit for the ultra-low power consumption standby of the personal marine rescue equipment, the reset circuit adopts the circuit with the functions ofAnd a programmable delayed nano-power high input voltage monitor TPS3840PH; the signals of an external water contact switch and a manual switch are converted into RESET pulse signals, wherein a 1 pin of a voltage monitor outputs the RESET signals, is connected with a third resistor R3 and a tenth resistor R12 of a voltage dividing resistor to obtain RESET pulse signals RESET signals after voltage division, a2 pin is connected with the positive pole power of the lithium battery, a 3 pin is connected with GND, a 4 pin is connected with the water contact switch and the manual switch, and a5 pin is connected with a sixth capacitor C8 to GND.
In the above circuit for ultra-low power consumption standby of the personal marine rescue equipment, the switch circuit adopts a PMOS tube SI4435BDY and two NPN triodes FMMT, which are a PMOS tube Q1, a first NPN triode Q2 and a second NPN triode Q3 respectively, and is used for controlling the lithium battery to supply power to the circuit; the source pin of the PMOS transistor Q1 is connected with the positive pole power of the power input lithium battery, the source pin of the PMOS transistor Q1 is connected with the second capacitor C3, the third capacitor C4 and the 1 pin of the second resistor R2, the second capacitor C3 and the 2 pin of the third capacitor C4 are grounded, the 2 pin of the second resistor R2 is connected with the grid electrode of the PMOS transistor Q1, the grid electrode pin of the PMOS transistor is connected with the collector pins of the first NPN transistor Q2 and the second NPN transistor Q3, the emitter pins of the first NPN transistor Q2 and the second NPN transistor Q3 are grounded, the base pin of the first NPN transistor Q2 is connected with a RESET pulse signal RESET after voltage division, the base pin of the second NPN transistor Q3 is connected with the pin control_Port pin of the controller and the sixth resistor R7 to GND, and the drain pin of the PMOS transistor Q1 is connected with the output voltage Vin of the switch circuit.
In the above circuit for ultra-low power consumption standby of the personal marine rescue device, the proportional amplifier is a TLC2272IDR integrated circuit chip U3, the power supply pin of the integrated circuit chip U3 is connected to the output voltage Vin of the switch circuit, the power supply GND pin is connected to GND, the input signal switch_in signal of the manual or water touch switch is connected to the input pin through an eighth resistor R10 and a ninth resistor R11, the reverse input pin is grounded through a seventh resistor R9, the output pin of the integrated circuit chip U3 and the indirect feedback resistor of the reverse input pin are connected to a fifth resistor R5, and the output pin of the integrated circuit chip U3 is connected to the second zener diode D4 to GND, and at the same time, the output pin of the integrated circuit chip U3 is connected to the AD acquisition pin adc_port of the controller.
In the above circuit for ultra-low power consumption standby of the personal marine rescue equipment, the DC-DC circuit adopts a TPS5450 switching power supply to output a current 5V5A for the system, wherein pins 2, 3 and 5 of the TPS5450 are suspended, pin 7 is connected to the output voltage Vin of the switching circuit, pins 6 and 9 are grounded, pin 1 is connected to pin 8 through a first capacitor C1, pin 2 of the first capacitor C1 is connected to GND through a first zener diode D1, pin 2 of the first capacitor C1 is connected to pin 1 of an inductor L1, pin 2 vout_5.0V of the inductor L1 is connected to pin 1 of a fourth capacitor C6 and pin 1 of a fifth capacitor C7, pin 2 of the fourth capacitor C6 and pin 2 of the fifth capacitor C7 are connected to GND, pin 2 of the inductor L1 is connected to GND through a first resistor R1 and a fourth resistor R4, and pin 4 of the TPS5450 is connected to pin 2 of the first resistor R1 and pin 1 of the fourth resistor R4.
In the circuit for the ultra-low power consumption standby of the personal marine rescue equipment, the water touch switch is two electrodes, and the manual switch is a light touch switch.
In the circuit for the ultra-low power consumption standby of the personal marine rescue equipment, the controller adopts the singlechip.
A standby method for an ultra-low power consumption standby circuit of personal marine rescue equipment comprises the following steps:
step 1, standby with ultra-low power consumption, wherein a water touch switch or a manual switch is turned on;
when two electrodes of the water contact switch fall into water, a voltage drop larger than 2.5V is formed, so that the reset circuit is reset, and when the manual switch is pressed down, the voltage is pulled down, a trigger signal larger than 2.5V voltage drop is formed, so that the reset circuit is reset;
Step 2, the reset circuit generates a pulse reset pulse signal with the output of 1.5s high level;
generating a pulse reset pulse signal of which the output is 1.5s high level by the voltage monitor;
step 3, the reset pulse signal controls the switch circuit to be opened, and the DC-DC circuit outputs the voltage required by the system;
After the reset circuit outputs a 1.5s high-level pulse reset signal, the switch circuit is opened, the voltage of the lithium battery is input into the DC-DC circuit, and the voltage required by the system is output;
Step 4, powering up a controller, outputting a high level by the controller to maintain the switch circuit to be opened, and continuously outputting the voltage required by the system by the DC-DC circuit;
The switching circuit is controlled by a controller pin control_Port signal and a reset pulse output signal of the reset circuit, when any one of the outputs is in a high level, the switching circuit is opened, the lithium battery voltage is allowed to supply power to the system, and the DC-DC circuit outputs the voltage required by the system; when the control_Port signal and the reset pulse output signal of the reset circuit both output a low level, the switch circuit is closed, the lithium battery voltage does not supply power to the system, and the DC-DC circuit does not output the system voltage;
step 5, the controller ADC_Port acquires the voltage value of the key, obtains the state of the water touch switch, reads the state of the manual switch key, judges whether rescue information needs to be transmitted, and enters step 9 if the rescue information does not need to be transmitted;
The DC-DC circuit continuously outputs the voltage required by the system, the system starts to work, the controller controls peripheral equipment, the controller collects the voltage value of the key, and whether distress information is sent or not is judged;
step 6, the controller monitors and cancels the emission button;
when the cancel transmitting button is pressed, the pin of the cancel transmitting button generates level change and outputs a falling edge signal;
step 7, when a cancel emission button is pressed, canceling emission and entering step 9;
when the water touch switch or the manual switch is not in action, after the pressing time exceeds 1.5s, the reset circuit outputs a low level, the switch circuit is only controlled by a signal output by a control_Port pin of the controller, the control_Port pin outputs a high level system to work, the control_Port pin outputs a low level, the switch circuit is closed, and only a reset circuit with nano power consumption in the system works, monitors dangerous situations and prolongs the standby time;
Step 8, when the cancel transmitting button is not pressed, the controller controls the peripheral circuit to transmit the distress message;
when the cancel transmitting button is not pressed, the system continues to work normally, and the controller continues to transmit the distress signal;
Step 9, the controller outputs low level to control a switch circuit for switching off the DC-DC circuit, and the system is in a standby state;
When the cancel emission button is pressed, the DC-DC circuit is powered off, and the system is in a standby state; the controller outputs high level, the reset circuit is controlled to output high level, the switch circuit is closed, only the reset circuit with nano power consumption works in the system, and meanwhile, dangerous situations are monitored, so that the standby time is prolonged.
Compared with the prior art, the invention has the beneficial effects that: after the water touch switch and the manual switch are not started or the emission button is cancelled to be pressed, the system is in a standby state, and only the reset circuit with nano power consumption works, so that the system can be in a standby state under ultra-low power consumption, the standby current is reduced, and the standby time of the lithium battery is prolonged as much as possible. The circuit is simple, and the standby time of the marine rescue equipment can be effectively prolonged.
Drawings
FIG. 1 is a system block diagram of a circuit for ultra-low power standby of personal offshore rescue equipment in accordance with an embodiment of the present invention;
FIG. 2 is a flow chart of an ultra-low power consumption standby method for personal offshore rescue equipment according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a water switch, manual and reset circuit of a circuit for ultra-low power standby of personal marine rescue equipment according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a lithium battery and a switching circuit of a circuit for ultra-low power standby of personal marine rescue equipment according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a proportional amplifier for a circuit for ultra-low power standby of personal marine rescue equipment according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a DC-DC circuit of a circuit for ultra-low power standby of personal marine rescue equipment according to an embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be further illustrated, but is not limited, by the following examples.
The embodiment adopts a low-power-consumption reset circuit to control the switch circuit, and if the switch is opened, the voltage source directly inputs the voltage to the DC-DC module. The mode of voltage output is derived from the input voltage. The circuit is used for low-power standby of the rescue position indication mark, a ready-made module can be directly used by adopting a water touch starting mode, the reset circuit is also an integrated circuit module adopting a packaged low-power reset circuit, the on-off of the switch circuit is controlled, and meanwhile, the functions and the circuit of a water touch switch and the reading mode of key values are added.
The embodiment is realized by the following technical scheme, and the circuit for the ultra-low power consumption standby of the personal marine rescue equipment comprises a lithium battery, a manual switch, a water touch switch, a reset circuit, a switch circuit, a DC-DC circuit, a controller, peripheral equipment, a proportional amplifier and a cancel emission button. The lithium battery is connected with the manual switch, the water contact switch, the reset circuit and the switch circuit, the reset circuit is connected with the manual switch, the water contact switch, the switch circuit and the controller, the manual switch, the water contact switch are connected with the lithium battery, the reset circuit and the proportional amplifier, the switch circuit is connected with the reset circuit and the DC-DC circuit, the DC-DC circuit is connected with the switch circuit, the controller, the proportional amplifier and the peripheral equipment, the controller is connected with the DC-DC circuit, the peripheral equipment, the cancel button, the reset circuit and the proportional amplifier, the peripheral equipment is connected with the DC-DC circuit and the controller, the cancel button is connected with the controller, and the proportional amplifier is connected with the manual switch, the water contact switch and the controller.
The rechargeable lithium battery is used for supplying power to the system;
the water touch switch and the manual switch are used for inputting signals generated by the water touch switch or the manual switch and outputting falling edge signals;
the reset circuit is used for inputting a falling edge signal and outputting a reset pulse signal;
The switching circuit is used for inputting a reset pulse signal or a level signal controlled by the controller, outputting lithium battery voltage and enabling the lithium battery voltage to be input into the DC-DC circuit;
The DC-DC circuit is used for inputting the voltage of the lithium battery, outputting the voltage required by the system and supplying power to the system;
The controller is mainly a singlechip controller and is used for outputting a level signal for controlling a switch circuit, a level signal for controlling peripheral equipment to work, a voltage signal obtained after the manual switch and the water touch switch are subjected to scaling down, and a falling edge signal obtained after the emission button is cancelled;
The cancel emission button is used for inputting a cancel emission signal and outputting a falling edge signal;
the proportional amplifier is used for inputting voltage signals at two ends of the manual switch or the water touch switch, outputting voltage signals of the manual switch or the water touch switch with reduced proportion, and collecting the voltage signals by the singlechip controller;
and the peripheral equipment is used for inputting the control signal of the controller and outputting the distress signal or display information.
Moreover, the water touch switch sends the distress information once touching water, and if the water touch switch is always in water, the distress information is always sent. The transmission button is canceled to stop sending the distress message only when the water touch switch does not touch water.
Moreover, after the water touch switch and the manual switch do not start and cancel the emission button to press, only the reset circuit works, and the system is in a standby state.
Moreover, the reset circuit adopts a high input voltage monitor with nano power consumption, and the standby time of the lithium battery is prolonged by ultra-low power consumption while the state of distress is not influenced.
The proportional amplifier is used for reducing the voltage values at two ends of the manual switch or the water touch switch to a voltage value suitable for being collected by the singlechip, when a key is manually pressed, the voltage value of the switch is 0V at the moment of voltage pressing, and the voltage value becomes battery voltage after the switch is released; when the water touching switch touches water, the voltage values at the two ends of the water touching switch cannot become 0V due to the fact that the seawater has a resistance, and therefore whether the device is started manually or started by touching water can be judged according to the voltage values acquired by the AD.
Specifically, the voltage of the lithium battery is accessed by J1, the 2 pins are positive pins of a power supply, and the 1 pins and the 3 pins are grounded.
Specifically, the reset circuit is provided withAnd a programmable delayed nano-power high input voltage monitor TPS3840PH. The signals of an external water contact switch and a manual switch are converted into RESET pulse signals, wherein a1 pin of the monitor outputs the RESET signals, a voltage dividing third resistor R3 and a tenth resistor R12 are connected, the voltage dividing RESET pulse signals RESET signals are obtained after the voltage dividing, a2 pin is connected with the positive pole power of the lithium battery, a 3 pin is connected with GND, a 4 pin is connected with the water switch and the manual switch, and a 5 pin is connected with C8 to GND.
Specifically, the switch circuit mainly comprises a PMOS tube Q1, a first NPN triode Q2 of two NPN triodes and a second NPN triode Q3, and is used for controlling the lithium battery to supply power to the circuit. The source (S) electrode pin of the PMOS transistor Q1 is connected with the positive pole power of the power input lithium battery, the source (S) electrode pin is connected with the 1 pin of the second capacitor C3, the third capacitor C4 and the second resistor R2, the 2 pin of the second capacitor C3 and the third capacitor C4 are grounded, the 2 pin of the second resistor R2 is connected with the gate (G) electrode of the PMOS transistor Q1, the gate (G) electrode pin of the PMOS transistor Q1 is connected with the collector pins of the first NPN transistor Q2 and the second NPN transistor Q3, the emitter pins of the first NPN transistor Q2 and the second NPN transistor Q3 are grounded, the base pin of the first NPN transistor Q2 is connected with a RESET pulse signal RESET after voltage division, the base pin of the second NPN transistor Q3 is connected with the pin control_Port pin and the fifth resistor R7 to GND, and the drain (G) electrode pin of the PMOS transistor Q1 is connected with the output voltage Vin of the switching circuit.
Specifically, the proportional amplifier is selected from TLC2272IDR operational amplifier integrated circuit chip U3, the power supply pin of the integrated circuit chip U3 is connected to voltage Vin, the power supply GND pin is connected to GND, the unidirectional input terminal pin is connected to the input signal switch_in signal of the manual or water touch switch through the eighth resistor R10 and the ninth resistor R11, the reverse input terminal pin is grounded through the seventh resistor R9, and the output pin of the U3 and the indirect feedback resistor of the reverse input terminal pin are connected to the fifth resistor R5, because the voltage collected by the controller singlechip AD is limited, the output pin of the U3 needs to output a voltage value after the scaling down, in order to ensure that the output voltage does not exceed the voltage limit, the output pin of the U3 is connected to the second zener diode D4 to GND, and the output pin of the U3 is connected to the AD collection pin adc_port of the controller singlechip.
Specifically, the DC-DC circuit adopts a switching power supply, when the switching circuit is turned on, the lithium battery supplies power to the circuit, the voltage for the system is output, and when the switching circuit is turned off, the lithium battery does not supply power to the circuit.
The working principle of the circuit is as follows: the lithium battery power supply system comprises a rechargeable lithium battery, a reset chip, a water contact switch, a manual switch, a switch circuit, a DC-DC circuit, a controller, a manual switch or a proportional amplifier, wherein the rechargeable lithium battery supplies power to the system, the reset chip is connected with the water contact switch and the manual switch, the water contact switch and the manual switch are used for controlling the reset chip to output reset signals, the switch circuit is used for controlling the lithium battery to supply power to the circuit, the DC-DC circuit is used for converting the voltage of the lithium battery into the voltage required by the system, the controller controls peripheral equipment and the switch circuit, meanwhile, the voltage values obtained by the proportional reduction of the two ends of the manual switch or the water contact switch are collected and serve as the basis for judging whether to emit a distress signal, the proportional amplifier is used for proportionally reducing the voltage values of the two ends of the manual switch or the water contact switch, a transmitting button is cancelled to collect the basis whether to cancel emission, when the signals canceling the emission are collected, the controller controls the switch circuit to be closed, and the voltage of the lithium battery can not supply power to the system, and the system stands by. After the water touch switch and the manual switch are not started or the emission button is cancelled to be pressed, the system is in a standby state, and only the reset circuit with nano power consumption works, so that the standby with ultra-low power consumption is realized while the monitoring distress state is not influenced, and the standby time of the lithium battery is prolonged as much as possible. Compared with the prior art, the invention has simple circuit and can effectively improve the standby time of rescue equipment.
A method for ultra-low power standby of personal marine rescue equipment, comprising the steps of:
step S01: standby with ultra-low power consumption, wherein a water touch switch or a manual switch is switched on;
The water contact switch or the manual switch acts, the water contact switch is two electrodes, when the two electrodes fall into water, voltage drop larger than 2.5V is formed according to the property of water, the reset circuit is reset, the manual switch is a tact switch, when a key is pressed down, the voltage is pulled down, a trigger signal larger than 2.5V voltage drop is formed, and the reset circuit is reset.
Step S02: the reset circuit generates a pulse reset pulse signal outputting a high level of about 1.5 s;
the 1 pin of the reset circuit generates a pulse reset pulse signal outputting a high level of about 1.5 s.
Step S03: the reset pulse signal controls the switch circuit to be opened, and the DC-DC circuit outputs the voltage required by the system;
After the reset circuit outputs a 1.5s pulse high-level reset signal, the switch circuit is opened, the lithium battery voltage flows into the DC-DC circuit, and the voltage required by the system is output.
Step S04: the controller is electrified, the controller outputs high level to keep the switch circuit open, and the DC-DC circuit continuously outputs the voltage required by the system;
The switching circuit is controlled by a controller pin control_Port signal and a reset pulse output signal of the reset circuit, when any one of the outputs is in a high level, the switching circuit is opened, the lithium battery voltage is allowed to supply power to the system, and the DC-DC circuit outputs the voltage required by the system; when the control_Port signal and the reset circuit output signal output a low level, the switch circuit is closed, the lithium battery voltage does not supply power to the system, and the DC-DC circuit does not output the system voltage.
Step S05: the controller ADC_Port acquires the voltage value of the key, obtains the state of the water touch switch, reads the state of the manual switch key, judges whether rescue information needs to be transmitted, and enters step S09 if the rescue information does not need to be transmitted;
The DC-DC circuit continuously outputs the voltage required by the system, the system starts to work, the controller controls peripheral equipment, the controller collects the voltage value of the key, and whether distress information is sent or not is judged.
Step S06: the controller monitors a cancel emission button;
when the cancel transmitting button is pressed, the pin of the cancel transmitting button can generate level change and output a falling edge signal.
Step S07: when the cancel transmission button is pressed, cancel transmission, step S09; when the water touch switch or the manual switch does not act, after the pressing time exceeds 1.5s, the reset circuit outputs a low level, the switch circuit is only controlled by a signal output by a control_Port pin of the singlechip controller, the control_Port pin outputs a high level system to work, the control_Port pin outputs a low level, the switch circuit is closed, only the reset circuit with nano power consumption works in the system, and the reset circuit has the function of monitoring dangerous situations while the power consumption is low, thereby being beneficial to prolonging the standby time.
Step S08: when the transmitting button is not pressed down, the controller controls the peripheral circuit to transmit the distress information;
when the cancel transmitting button is not pressed, the system continues to work normally, and the controller continues to transmit the distress signal.
Step S09: the controller outputs low level to control a switch circuit for switching off the DC-DC circuit, and the system is in a standby state;
when the cancel emission button is pressed, the DC-DC circuit is powered off, and the system is in a standby state. The singlechip outputs high level, controls the reset circuit to output high level, the switch circuit is closed, only the reset circuit with nano power consumption works in the system, and the system has the function of monitoring dangerous situations while the power consumption is low, thereby being beneficial to prolonging the standby time.
The working principle of the circuit for the ultra-low power consumption standby of the personal marine rescue equipment is as follows:
The touch switch or the manual switch monitors a command that a user needs to send a distress signal, so that the reset circuit outputs a high-level reset pulse, the switch circuit is started, lithium battery voltage is input to the DC-DC circuit, the DC-DC circuit acts to output the voltage required by the system, the controller is electrified, the control_Port pin is controlled to output the high-level to Control the switch circuit to be always on, the DC-DC circuit always works, the controller controls peripheral equipment to supply power and work according to a flow, meanwhile, the proportional amplifier works, the singlechip controller acquires the voltage value output by the proportional amplifier through the ADC_Port pin, whether the manual press or the touch is judged, the controller monitors whether a cancel button is pressed in real time, and when the cancel button is pressed, the controller controls the control_Port pin to output a low level, the switch circuit is closed, and the system stands by.
Further, the controller is a singlechip with AD acquisition.
Further, the voltage of the lithium battery is accessed by J1, the 2 pins are positive pins of a power supply, and the 1 pins and the 3 pins are grounded.
Further, the reset circuit is provided withAnd a programmable delayed nano-power high input voltage monitor. The signals of an external water contact switch and a manual switch are converted into RESET pulse signals, wherein a1 pin of a monitor outputs the RESET signals, a third resistor R3 and a tenth resistor R12 of a voltage dividing resistor are connected, the divided RESET pulse signals RESET signals are obtained after voltage division, a 2 pin is connected with the positive pole power of the lithium battery, a3 pin is connected with GND, a 4 pin is connected with the water switch and the manual switch, and a 5 pin is connected with a sixth capacitor C8 to GND.
Further, the switch circuit mainly comprises a PMOS tube Q1, a first NPN triode Q2 and a second NPN triode Q3, and controls the lithium battery to supply power to the system. The source (S) electrode pin of the PMOS transistor Q1 is connected with the positive electrode power of the lithium battery, the source (S) electrode pin is connected with the second capacitor C3, the third capacitor C4 and the 1 pin of the second resistor R2, the 2 pin of the second capacitor C3 and the 2 pin of the third capacitor C4 are grounded, the 2 pin of the second resistor R2 is connected with the gate (G) electrode of the PMOS transistor Q1, the gate (G) electrode pin of the PMOS transistor Q1 is connected with the collector pins of the first NPN transistor Q2 and the second NPN transistor Q3, the emitter pins of the first NPN transistor Q2 and the second NPN transistor Q3 are grounded, the base pin of the first NPN transistor Q2 is connected with a RESET pulse signal RESET signal after voltage division, the base pin of the second NPN transistor Q3 is connected with the SCM pin Control_Port and the sixth resistor R7 to GND, and the drain (G) electrode pin of the PMOS transistor Q1 is connected with the output voltage Vin of the switch circuit.
Further, the proportional amplifier is an operational amplifier integrated circuit chip U3, the power supply pin of the integrated circuit chip U3 is connected with the voltage Vin, the power supply GND pin is connected with GND, the unidirectional input end pin is connected with a switch_in signal through an eighth resistor R10 and a ninth resistor R11, the reverse input end pin is grounded through a seventh resistor R9, and the indirect feedback between the output pin and the reverse input end pin of the U3 is a fifth resistor R5, because the voltage collected by the AD of the controller singlechip is limited, the output pin of the U3 needs to output a voltage value after the scaling down, in order to ensure that the output voltage does not exceed the voltage limiting value, the output pin of the U3 is connected with a second voltage stabilizing diode D4 to GND, and meanwhile, the output pin of the U3 is connected with the AD collection pin adc_port of the controller singlechip.
Further, the DC-DC circuit employs a switching power supply that outputs a voltage for use by the system when the switching circuit is on and outputs no voltage when the switching circuit is off.
Specifically, the water contact switch or the manual switch acts, the water contact switch is two electrodes, when the two electrodes fall into water, according to the property of the water, a voltage drop larger than 2.5V is formed, so that the reset circuit is reset, the manual switch is a tact switch, when a key is pressed down, the voltage is pulled down, a trigger signal larger than 2.5V voltage drop is formed, and the reset circuit is reset.
Specifically, pin 1 of the reset circuit generates a pulse reset pulse signal which outputs a high level of about 1.5 s;
Specifically, the switch circuit is controlled by a pin control_Port signal of the singlechip controller and a reset signal output signal of the reset circuit, when any one of the output signals outputs a high level, the switch circuit is opened, the lithium battery voltage flows into the DC-DC circuit, and the voltage required by the system is output; when both the control_port signal and the reset circuit output signal output a low level, the switching circuit is turned off and lithium battery voltage does not flow into the DC-DC circuit.
Specifically, when the reset button or the water touch switch is pressed, the 1 pin of the reset circuit generates a pulse reset pulse signal which outputs a high level of about 1.5s, the DC-DC circuit outputs the voltage required by the system within 1.5s of the high level, the controller is electrified, the control_Port pin outputs the high level, the switch circuit is continuously opened, and the system works.
Specifically, after the reset key is pressed or the water touch switch touches water for 1.5 seconds, the switch circuit is controlled by the control_Port pin to Control whether the switch circuit is opened or not, when the control_Port pin outputs a high level, the switch circuit is opened, DC-DC works to provide required voltage for the system, when the control_Port pin outputs a low level, the switch circuit is closed, the DC-DC circuit outputs system voltage, and the system is powered off.
In specific implementation, a circuit for ultra-low power consumption standby of personal marine rescue equipment comprises: the signal flow diagram of the lithium battery, the manual switch, the water touch switch, the reset circuit, the switch circuit, the DC-DC circuit, the controller, the peripheral equipment, the proportional amplifier and the cancel emission button is shown in figure 1. The rechargeable lithium battery supplies power to the system, the reset chip is connected with the contact water switch and the manual switch, the contact water switch and the manual switch control the reset chip to output reset signals, the switch circuit is used for controlling the voltage of the lithium battery to the post-stage DC-DC circuit, the DC-DC circuit is used for converting the voltage of the lithium battery into the voltage required by the system to supply power to the system, the controller controls the peripheral equipment and the switch circuit, meanwhile, the voltage values of the manual switch and the contact water switch are collected and used as the basis for judging whether to transmit signals or not, the state of a cancel transmitting button is monitored and used as the basis for whether to cancel transmitting or not, and when the signals canceling transmitting are collected, the controller controls the reset circuit and the system stands by.
As shown in fig. 2, a flowchart of a method for ultra-low power consumption standby of personal marine rescue equipment in this embodiment is as follows:
step S01: standby with ultra-low power consumption, wherein a water touch switch or a manual switch is switched on;
Step S02: the reset circuit generates a pulse reset pulse signal outputting a high level of about 1.5 s;
step S03: the reset pulse signal controls the switch circuit to be opened, and the DC-DC circuit outputs the voltage required by the system;
step S04: the controller is electrified, the controller outputs high level to keep the switch circuit open, and the DC-DC circuit continuously outputs the voltage required by the system;
Step S05: the single chip microcomputer controller ADC_Port acquires the voltage value of the key, obtains the state of the water touch switch, reads the state of the manual switch key, judges whether rescue information needs to be transmitted, and enters step S09 if the rescue information does not need to be transmitted;
step S06: the controller monitors the emission cancel button;
step S07: when the cancel button is pressed, cancel the transmission, step S09;
step S08: when the cancel button is not pressed, the controller controls the peripheral circuit to transmit the distress information;
Step S09: the controller outputs a low level to control a switching circuit for switching off the DC-DC circuit, and the system is in a standby state.
As shown in fig. 3, a schematic circuit diagram of a water touch switch, a manual switch and a reset circuit of a circuit for ultra-low power consumption standby of personal marine rescue equipment according to the present embodiment is shown. The two pins of the water contact switch P1 are respectively contacted with the two poles of the water contact switch, the water contact switch is provided with two electrodes which are not connected, and in seawater, the seawater is conductive, and the electrodes are conducted. KEY1 is a manual switch, and when a KEY is pressed down, two legs of KEY1 are conducted. The water contact switch is connected in parallel with the manual switch, when the switch is not conducted, the switch_in signal is at a high level, and when the switch is conducted, the switch_in signal is at a low level. When the manual switch is pressed down, the switch_in voltage is recovered from 0V to the battery voltage, and the water contact switch contacts water, so that a certain resistance is presented according to the conductivity of seawater, the voltage is not 0V, and therefore whether the water contact switch is started or the manual switch is started can be determined through different voltages. The reset circuit is selected to haveAnd a programmable delay TPS3840 nano-power consumption high input voltage monitor TPS3840PH integrated circuit chip U1, wherein the 1 pin of the integrated circuit chip U1 outputs a RESET signal, the voltage division resistor is connected with the third resistor R3 and the tenth resistor R12 to divide the voltage to obtain a RESET signal, the 2 pin is connected with the power, the 3 pin is connected with the GND, the 4 pin is connected with a water switch and a manual switch, and the 5 pin is connected with the sixth capacitor C8 to GND. The principle of the reset circuit is that when the pin 4 has a falling edge signal, the pin 5 is pulled down, the sixth capacitor C8 starts to charge, meanwhile, the pin 1 outputs a high-level reset signal, and when the sixth capacitor C8 charges more than 2.5V, the low-level signal of the pin 1 jumps to be a low-level signal. When the water touch switch or the manual switch is pressed, the voltage drop of 2.5V is generated on the 4 pin of TPS3840PH, the 1 pin and the 5 pin of TPS3840PH are triggered to generate high level, when the 5 pin of TPS3840PH is charged to be more than 2.5V, the 1 pin of TPS3840PH outputs low level, and the RESET signal controls the switch circuit.
Fig. 4 is a schematic diagram of a switching circuit of a circuit for ultra-low power standby of personal marine rescue equipment according to the present embodiment. The switch circuit mainly adopts a PMOS tube SI4435BDY and two NPN triodes FMMT495, the reference numbers are a PMOS tube Q1, a first NPN triode Q2 and a second NPN triode Q3 respectively, and the on-off of the voltage of the lithium battery flowing into a rear circuit is controlled. The switch circuit adopts a PMOS tube SI4435BDY to control the on-off of the voltage of the lithium battery flowing into a subsequent circuit. The pins 1, 2 and 3 of the SI4435BDY are connected with the power, the pins 1 of the second capacitor C3 and the third capacitor C4 are connected with the ground, the pins 2 of the second capacitor C3 and the third capacitor C4 are connected with the first NPN triode Q2 and the 3 pin of the second NPN triode Q3, the pins 2 of the first NPN triode Q2 and the second NPN triode Q3 are connected with the ground, the pin 1 of the first NPN triode Q2 is connected with the RESET, the pin 1 of the second NPN triode Q3 is connected with the PC0 pin of the controller singlechip and the sixth resistor R7 to GND, and the pins 5, 6, 7 and 8 of the PMOS tube SI4435BDY are connected with Vin. The principle of the switching circuit is that the first NPN triode Q2 and the second NPN triode Q3 are respectively controlled by a RESET signal RESET and a pin PC0, when any one of the transistors generates a high level, the corresponding triode is conducted, the GS pole of the PMOS tube Q1 generates a voltage difference, the PMOS tube Q1 is conducted, and Vin is output by the voltage.
As shown in fig. 5, a schematic circuit diagram of a proportional amplifier of a circuit for ultra-low power standby of an offshore rescue device according to the present embodiment is shown. When the manual switch is pressed down, the switch_in voltage is restored to the battery voltage from 0V, and the water contact switch is used for contacting water, so that the resistance is presented according to the conductivity at sea, the voltage is not sent to 0V and is changed into the battery voltage, and therefore whether the water contact switch is started or the manual switch is started can be judged through different determination of the voltage. The proportional amplifier is selected from TLC2272IDR integrated circuit chip U3, voltage VI is connected to pin 4 of the integrated circuit chip U3, pin 4 is connected to switch_in signal through eighth resistor R10 and ninth resistor R11, pin 2 is grounded through seventh resistor R9, pin 1 and pin 2 indirectly feed back resistor fifth resistor R5, because voltage received by the singlechip is lower than 3.3V, voltage after 1 pin output scale is reduced is collected by automatic ADC pin PC4 pin of the singlechip. According to the principle of deficiency, shortness and deficiency, the method comprises the following steps:
Fig. 6 shows a schematic diagram of a DC-DC circuit for a circuit for ultra-low power standby of personal marine rescue equipment. The DC-DC circuit adopts TPS5450, and outputs 5V5A current for the system according to the requirement. The pins 2, 3 and 5 of the TPS5450 are suspended, the pin 7 is grounded, the pins 6 and 9 are grounded, the pin 1 is connected to the pin 8 through the first capacitor C1, the pin 2 of the first capacitor C1 is connected with the GND through the first zener diode D1, the pin 2 of the first capacitor C1 is connected with the pin 1 of the inductor L1, the pin 2 Vout_5.0V of the inductor L1 is connected with the pin 1 of the fourth capacitor C6 and the fifth capacitor C7, the pin 2 of the fourth capacitor C6 and the pin 2 of the fifth capacitor C7 are connected with the GND, the pin 2 of the inductor L1 is connected with the pin 2 of the first resistor R1 and the pin 1 of the fourth resistor R4.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, which are intended to be included within the scope of the present invention.
Claims (7)
1. A circuit that is used for ultra-low power consumption standby of personal marine rescue equipment, its characterized in that: the power supply comprises a lithium battery, a manual switch, a water touch switch, a reset circuit, a switch circuit, a DC-DC circuit, a controller, peripheral equipment, a proportional amplifier and a cancel emission button; the lithium battery is connected with the manual switch, the water contact switch, the reset circuit, the switch circuit and the DC-DC circuit, the reset circuit is connected with the manual switch, the water contact switch, the switch circuit and the controller, the manual switch and the water contact switch are connected with the lithium battery, the reset circuit and the proportional amplifier, the switch circuit is connected with the reset circuit and the DC-DC circuit, the DC-DC circuit is connected with the lithium battery, the switch circuit, the controller, the proportional amplifier and the peripheral equipment, the controller is connected with the DC-DC circuit, the peripheral equipment, the cancel emission button, the reset circuit and the proportional amplifier, the peripheral equipment is connected with the DC-DC circuit and the controller, the cancel emission button is connected with the controller, and the proportional amplifier is connected with the manual switch, the water contact switch and the controller; the reset circuit is provided withAnd a programmable delayed nano-power high input voltage monitor TPS3840PH; converting signals of an external water contact switch and a manual switch into RESET pulse signals, wherein a1 pin of a voltage monitor outputs the RESET signals, is connected with a third resistor R3 and a tenth resistor R12 of a voltage dividing resistor to obtain divided RESET pulse signals RESET signals, a 2 pin is connected with a positive pole power of a lithium battery, a 3 pin is connected with GND, a 4 pin is connected with the water contact switch and the manual switch, and a 5 pin is connected with a sixth capacitor C8 to GND; the switch circuit adopts a PMOS tube SI4435BDY and two NPN triodes FMMT495, which are a PMOS tube Q1, a first NPN triode Q2 and a second NPN triode Q3 respectively, and is used for controlling the lithium battery to supply power to the circuit; the source pin of the PMOS transistor Q1 is connected with the positive pole power of the power input lithium battery, the source pin of the PMOS transistor Q1 is connected with the second capacitor C3, the third capacitor C4 and the 1 pin of the second resistor R2, the second capacitor C3 and the 2 pin of the third capacitor C4 are grounded, the 2 pin of the second resistor R2 is connected with the grid electrode of the PMOS transistor Q1, the grid electrode pin of the PMOS transistor is connected with the collector pins of the first NPN transistor Q2 and the second NPN transistor Q3, the emitter pins of the first NPN transistor Q2 and the second NPN transistor Q3 are grounded, the base pin of the first NPN transistor Q2 is connected with a RESET pulse signal RESET after voltage division, the base pin of the second NPN transistor Q3 is connected with the pin control_Port pin of the controller and the sixth resistor R7 to GND, and the drain pin of the PMOS transistor Q1 is connected with the output voltage Vin of the switch circuit.
2. The circuit for ultra-low power standby of personal marine rescue equipment according to claim 1, wherein: the voltage of the lithium battery is accessed by J1, the pin 2 is the positive pin of the power supply, and the pins 1 and 3 are grounded.
3. The circuit for ultra-low power standby of personal marine rescue equipment according to claim 1, wherein: the proportional amplifier selects TLC2272IDR integrated circuit chip U3, the power supply pin of the integrated circuit chip U3 is connected with the output voltage Vin of the switch circuit, the power supply GND pin is connected with GND, the homodromous input end pin is connected with the input signal switch_in signal of the manual or touch water switch through an eighth resistor R10 and a ninth resistor R11, the reverse input end pin is grounded through a seventh resistor R9, the indirect feedback resistor of the output pin and the reverse input end pin of the integrated circuit chip U3 is a fifth resistor R5, the output pin of the integrated circuit chip U3 is connected with a second zener diode D4 to GND, and meanwhile, the output pin of the integrated circuit chip U3 is connected with the AD acquisition pin ADC_Port of the controller.
4. The circuit for ultra-low power standby of personal marine rescue equipment according to claim 1, wherein: the DC-DC circuit adopts a TPS5450 switching power supply to output current 5V5A for the system, wherein pins 2,3 and 5 of the TPS5450 are suspended, pins 7 are connected with the output voltage Vin of the switching circuit, pins 6 and 9 are grounded, pin 1 is connected with pin 8 through a first capacitor C1, pin 2 of the first capacitor C1 is connected with GND through a first voltage stabilizing diode D1, pin 2 of the first capacitor C1 is connected with pin 1 of an inductor L1, pin 2 Vout_5.0V of the inductor L1 is connected with pin 1 of a fourth capacitor C6 and a fifth capacitor C7, pin 2 of the fourth capacitor C6 and the fifth capacitor C7 is connected with GND, pin 2 of the inductor L1 is connected with GND through a first resistor R1 and a fourth resistor R4, and pin 4 of the TPS5450 is connected with pin 2 of the first resistor R1 and pin 1 of the fourth resistor R4.
5. The circuit for ultra-low power standby of personal marine rescue equipment according to claim 1, wherein: the water touch switch is two electrodes, and the manual switch is a light touch switch.
6. The circuit for ultra-low power standby of personal marine rescue equipment according to claim 1, wherein: the controller adopts a singlechip.
7. Standby method for ultra low power standby circuit of personal marine rescue equipment according to any of claims 1-6, characterized in that: the method comprises the following steps:
step 1, standby with ultra-low power consumption, wherein a water touch switch or a manual switch is turned on;
when two electrodes of the water contact switch fall into water, a voltage drop larger than 2.5V is formed, so that the reset circuit is reset, and when the manual switch is pressed down, the voltage is pulled down, a trigger signal larger than 2.5V voltage drop is formed, so that the reset circuit is reset;
Step 2, the reset circuit generates a pulse reset pulse signal with the output of 1.5s high level;
generating a pulse reset pulse signal of which the output is 1.5s high level by the voltage monitor;
step 3, the reset pulse signal controls the switch circuit to be opened, and the DC-DC circuit outputs the voltage required by the system;
After the reset circuit outputs a 1.5s high-level pulse reset signal, the switch circuit is opened, the voltage of the lithium battery is input into the DC-DC circuit, and the voltage required by the system is output;
Step 4, powering up a controller, outputting a high level by the controller to maintain the switch circuit to be opened, and continuously outputting the voltage required by the system by the DC-DC circuit;
The switching circuit is controlled by a controller pin control_Port signal and a reset pulse output signal of the reset circuit, when any one of the outputs is in a high level, the switching circuit is opened, the lithium battery voltage is allowed to supply power to the system, and the DC-DC circuit outputs the voltage required by the system; when the control_Port signal and the reset pulse output signal of the reset circuit both output a low level, the switch circuit is closed, the lithium battery voltage does not supply power to the system, and the DC-DC circuit does not output the system voltage;
step 5, the controller ADC_Port acquires the voltage value of the key, obtains the state of the water touch switch, reads the state of the manual switch key, judges whether rescue information needs to be transmitted, and enters step 9 if the rescue information does not need to be transmitted;
The DC-DC circuit continuously outputs the voltage required by the system, the system starts to work, the controller controls peripheral equipment, the controller collects the voltage value of the key, and whether distress information is sent or not is judged;
step 6, the controller monitors and cancels the emission button;
when the cancel transmitting button is pressed, the pin of the cancel transmitting button generates level change and outputs a falling edge signal;
step 7, when a cancel emission button is pressed, canceling emission and entering step 9;
when the water touch switch or the manual switch is not in action, after the pressing time exceeds 1.5s, the reset circuit outputs a low level, the switch circuit is only controlled by a signal output by a control_Port pin of the controller, the control_Port pin outputs a high level system to work, the control_Port pin outputs a low level, the switch circuit is closed, and only a reset circuit with nano power consumption in the system works, monitors dangerous situations and prolongs the standby time;
Step 8, when the cancel transmitting button is not pressed, the controller controls the peripheral circuit to transmit the distress message;
when the cancel transmitting button is not pressed, the system continues to work normally, and the controller continues to transmit the distress signal;
Step 9, the controller outputs low level to control a switch circuit for switching off the DC-DC circuit, and the system is in a standby state;
When the cancel emission button is pressed, the DC-DC circuit is powered off, and the system is in a standby state; the controller outputs high level, the reset circuit is controlled to output high level, the switch circuit is closed, only the reset circuit with nano power consumption works in the system, and meanwhile, dangerous situations are monitored, so that the standby time is prolonged.
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| CN100359418C (en) * | 2004-07-05 | 2008-01-02 | 周先谱 | Zero-power-consumption standby power supply control device |
| CN105611200B (en) * | 2015-12-28 | 2018-09-04 | 深圳Tcl数字技术有限公司 | Zero consumption standby circuit and Zero-power-consumption standby TV |
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