CN203587997U - Multipath digital value input/output unit - Google Patents
Multipath digital value input/output unit Download PDFInfo
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- CN203587997U CN203587997U CN201320617075.5U CN201320617075U CN203587997U CN 203587997 U CN203587997 U CN 203587997U CN 201320617075 U CN201320617075 U CN 201320617075U CN 203587997 U CN203587997 U CN 203587997U
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Abstract
The utility model provides a multipath digital value input/output unit. The multipath digital value input/output unit comprises a microprocessor for controlling the input and output of the digital value; an input terminal photoelectric isolation module; at least two digital value input circuits, which are connected with the microprocessor through the photoelectric isolation module; and a watch dog reset circuit which is connected with the microprocessor, and used for reset the microprocessor. In the multipath digital value input/output unit, an interference source and the part which are liable to be interfered are isolated by the photoelectric isolation module, so that integrity of data is maintained, and interconnected devices are protected. By employing the watch dog reset circuit, the microprocessor is subjected to hardware reset when a fault happens to the microprocessor, so that the processor can resume a controllable state. With the multipath digital value input/output unit, the stability of usage of the multipath digital value input/output unit and the accuracy of data input/output are further improved. The price of the multipath digital value input/output unit is controllable, thus industrialization popularization and utilization are facilitated.
Description
Technical field
The utility model relates to digital quantity input-output device field, is specifically related to a kind of Multipath digital quantity input-output unit.
Background technology
Along with improving constantly of automaticity, increasing field adopts robotization control to carry out the Industry Control of this area.Data acquisition, refers to from the process of the analog quantitys such as sensor or other Devices to tests or the detected automatic Information Monitoring in unit of digital quantity.In most industrial automatic controls, all inevitably can relate to the problem of digital data acquisition, can the accurate reliability of digital quantity signal sampling normally reliablely and stablely work for whole TT&C system, plays an important role.Current, the development priority of digital quantity signal Acquisition Circuit concentrates on raising acquisition precision substantially, strengthens antijamming capability, reduces the aspects such as power consumption and anticorrosion, impact, vibrations.
At actual MCU(micro-control unit) in application system; due to some interference that usually can be come from the outside; likely cause program fleet and enter endless loop, thereby cause being absorbed in dead state and can not automatically restoring to controlled duty of whole system.Instruction technique, software trap technology can not make program out of control break away from the predicament of " endless loop ", and at this moment system is paralysed completely.If operator is on the scene, just can press manual reset peace button, forced system resets.But operator often can not monitor system always, also after causing adverse consequences, just carry out often manual reset.
Application publication number is that CN102467106A(application number is 201010544492.2) Chinese invention patent application a kind of PLC digital quantity input control device and control method thereof are disclosed, this device comprises programmable logic controller PLC digital quantity input processing module and at least one railway digital amount input control circuit, described PLC digital quantity input processing module is connected with described digital quantity input control circuit, wherein, described digital quantity input control circuit comprises the first digital input circuit and the second digital input circuit, described the first digital input circuit and the second digital input circuit are accepted the digital quantity of same input end input, and described digital quantity is controlled to output, described PLC digital quantity input processing module comprises at least one input fault detection module, for receiving the digital quantity signal of described the first digital input circuit and the second digital input circuit control output, and detect described digital quantity input control circuit and whether break down, when the test results is yes, malfunction warning information is set.When a road input circuit wherein breaks down while coming into force, also have an other road input circuit to guarantee the normal input of digital quantity, can effectively solve the integrity problem of digital quantity input in prior art.But, when running into abnormal conditions, causing while crashing, PLC cannot automatically reset, and cannot make PLC again normally work.
Application publication number is that CN103064318A(application number is 201310030565.X) Chinese invention patent application a kind of self-monitoring digital data acquisition device is disclosed, comprise: microprocessor, USB interface feed circuit, digital-quantity input interface and self-detection circuit, described digital-quantity input interface is successively by a filtering circuit, a buffer circuit is connected to microprocessor, USB interface feed circuit comprise USB modular converter, USB modular converter one end is connected to microprocessor, the other end connects outer end by USB interface, the input end of described self-detection circuit is connected to microprocessor, output terminal is connected to digital-quantity input interface by an one-way conduction circuit.Although the fault that this technical scheme can occur by promptly detect digital quantity input end from detection module, has accelerated maintenance speed, breaks down and cannot automatically reset, and cannot autoboot normally be worked by collector again.
Utility model content
The utility model provides a kind of Multipath digital quantity input-output unit, input end photoelectric isolation module, by interference source and the part being easily disturbed keep apart, watchdog reset circuit, once microprocessor operation is broken down, can to microprocessor, carry out hardware reset to forcing, make whole Multipath digital quantity input-output unit again in controllable state.
A kind of Multipath digital quantity input-output unit, comprising:
For the microprocessor of control figure amount input and output;
Input end photoelectric isolation module;
At least two-way digital input circuit, this digital input circuit is connected with described microprocessor by described input end photoelectric isolation module;
Be connected with described microprocessor, for the watchdog reset circuit that described microprocessor is resetted.
In the utility model; input end photoelectric isolation module; by interference source and the part being easily disturbed keep apart; make at least two-way digital input circuit and microprocessor only holding signal contact; avoid the ringing pulse impact in commercial Application environment, thereby maintain the integrality of data and protect interconnect equipment.The major advantage of input end photoelectric isolation module is: signal one-way transmission, realized electrical isolation completely, and output signal is on input end without impact, and antijamming capability is strong, and working stability is contactless, long service life, transfer efficiency is high.Watchdog reset circuit, once microprocessor operation is broken down, carries out hardware reset with regard to forcing to microprocessor, makes whole Multipath digital quantity input-output unit again in controllable state.In case of abnormal conditions cause deadlock, watchdog reset circuit can force microprocessor to automatically reset, and it is normally worked again.
As preferably, described microprocessor adopts and embeds the power consumption intelligent chip MSP430(Texas Instruments that declines), a kind of 16 mixed-signal processors with reduced instruction set computer (RISC), have the advantages such as processing power is strong, fast operation, super low-power consumption.
As preferably, described at least two-way digital input circuit is 8 road pulse signal input circuits, and pulse signal is a kind of discrete signal, between waveform at time shaft discontinuous (having obvious interval between waveform and waveform) but there is certain periodicity.In practical application in industry, multiple sensors can provide pulse signal, and as approach switch etc., applicability is wide.And adopt 8 tunnels, convenient expansion and application.
As preferably, described Multipath digital quantity input-output unit, also comprises: keyboard input module, described keyboard input module is connected with described microprocessor by described input end photoelectric isolation module.Keyboard input module can be according to field condition and actual needs, to microprocessor input digital quantity signal.Further preferably, described keyboard input module comprises 8 tunnel industry buttons, convenient expansion and application.
As preferably, described microprocessor is connected to data memory module, for storing multiple key parameters, prevents that power down from surprisingly occurring, and reduces unnecessary loss.Further preferably, on described data memory module, be connected to voltage stabilizing diode, when external voltage occurs fluctuation or has a power failure, voltage stabilizing diode ends rapidly, notice microprocessor is stored significant data, reinitializes and recovers move after data in order to voltage after recovering.
As preferably, described microprocessor is connected to communication interface, and this communication interface can adopt physical interface RS485, can networking, thus realize and external device data exchange convenient expansion and Industry Control.
As preferably, described microprocessor is connected with relay output module by output terminal photoelectric isolation module.This microprocessor can be exported by Control, thereby realizes Industry Control, and; output terminal photoelectric isolation module; when to peripheral relay operation, can avoid the impact of large electric current to internal circuit, thereby maintain the integrality of data and protect interconnect equipment.Further preferably, output is controlled on described relay output module Wei16 road, by 16 road Control outputs, corresponding to 8 road pulse signal input circuits and 8 tunnels industry button, convenient expansion and application.
Described Multipath digital quantity input-output unit, also comprises: power module is each parts power supply.
Compared with prior art, the utlity model has following advantage:
The utility model Multipath digital quantity input-output unit; comprise microprocessor, input end photoelectric isolation module, digital input circuit and watchdog reset circuit; wherein; input end photoelectric isolation module by interference source and the part being easily disturbed keep apart; make at least two-way digital input circuit and microprocessor only holding signal contact; avoid the ringing pulse impact in commercial Application environment, thereby maintain the integrality of data and protect interconnect equipment.Watchdog reset circuit, once microprocessor operation is broken down, carries out hardware reset with regard to forcing to microprocessor, makes whole Multipath digital quantity input-output unit again in controllable state.Therefore, the correctness of the stability that the utility model Multipath digital quantity input-output unit is used and data output input all further improves, and price is controlled, is conducive to industrialization promotion utilization, has broad application prospects.
The utility model Multipath digital quantity input-output unit, in optimal technical scheme, also comprises keyboard input module, data memory module, communication interface, relay, further improves performance of the present utility model and further facilitates its expanded application.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Multipath digital quantity input-output unit.
Embodiment
Below in conjunction with accompanying drawing, the utility model Multipath digital quantity input-output unit is described in further detail.
As shown in Figure 1, be the utility model Multipath digital quantity input-output unit, comprising: for the microprocessor 4 of control figure amount input and output; Input end photoelectricity isolation mode 3; Digital input circuit 2, digital input circuit 2 is connected with microprocessor 4 by input end photoelectric isolation module 3; Be connected with microprocessor 4, for the watchdog reset circuit 7 that microprocessor 4 is resetted.Microprocessor 4 adopts and embeds the power consumption intelligent chip MSP430(Texas Instruments that declines).Digital input circuit 2 is 8 road high-speed pulse signal input circuits.Multipath digital quantity input-output unit also comprises keyboard input module 1, and keyboard input module 1 is also connected with microprocessor 4 by input end photoelectric isolation module 3.Keyboard input module 1 comprises 8 tunnel industry buttons.Microprocessor 4 is connected to data memory module 5.Microprocessor 4 is connected to communication interface 6, and this communication interface 6 can adopt physical interface RS485.Microprocessor 4 is connected with 16 road relay output modules 9 by output terminal photoelectric isolation module 8.This Multipath digital quantity input-output unit also comprises: power module is each parts power supply.
8 road high-speed pulse signal input circuits adopt interrupt functions, can the maximum 8 railway digital amount pulse signals of fast detecting, and speed can reach 2MHZ, without pulse-losing.Keyboard input module 1 can support at most 8 road buttons to operate simultaneously, and microprocessor 4 detects after key-press input, realizes the functions such as output statistics, data transmission, alarm.
Input end photoelectricity isolation mode 3 and output terminal photoelectric isolation module 8 are all mainly used to isolating exterior push button signalling, high-speed pulse signal, relay output signal and internal microprocessor 4 and relevant peripheral circuit; make its only holding signal contact, maintain the integrality of data and protect interconnect equipment.Prevent that the Multipath digital quantity input-output unit that outside heavy current impact causes is unstable, during especially to peripheral relay operation, large electric current is unavoidable to the impact of circuit.
Watchdog reset circuit 7 adopts reset chip MAX706, its reseting pin is connected with the resetting pin of microprocessor 4, feeding dog pin is connected with an IO mouth of microprocessor 4, microprocessor 4 carries out dog feeding operation to MAX706 one time every 1S when normal work, in case of abnormal conditions cause soft deadlock, reset chip MAX706 can force microprocessor 4 to reset, and it is normally worked again.
Data memory module 5 adopts the design of 18V voltage stabilizing diode, and when external voltage occurs fluctuation or has a power failure, voltage stabilizing diode ends rapidly, and notice microprocessor 4 is stored significant data, reinitializes and recovers move after data in order to voltage after recovering.
Communication can adopt industrial communication standard MODBUS bus protocol, adopts the MODBUSRTU form of standard.In communication interface 6, use two 485 chips, a road is used for standby, and another Lu Keyu external unit forms automatic control system, break-make that can Control on Communication relay output module, thus reach the object of simultaneously controlling outside one or more equipment.
16 road relay output module 9 grades are integrated on a circuit board, carry JTAG programming mouth, can conveniently to circuit board, carry out programming operation.
Above-described embodiment has been described in detail the technical solution of the utility model and beneficial effect; be understood that and the foregoing is only most preferred embodiment of the present utility model; be not limited to the utility model; all any modifications of making within the scope of principle of the present utility model, supplement and be equal to replacement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a Multipath digital quantity input-output unit, is characterized in that, comprising:
For the microprocessor of control figure amount input and output;
Input end photoelectric isolation module;
At least two-way digital input circuit, this digital input circuit is connected with described microprocessor by described input end photoelectric isolation module;
Be connected with described microprocessor, for the watchdog reset circuit that described microprocessor is resetted.
2. Multipath digital quantity input-output unit according to claim 1, is characterized in that, described at least two-way digital input circuit is 8 road pulse signal input circuits.
3. Multipath digital quantity input-output unit according to claim 1, is characterized in that, also comprises: keyboard input module, described keyboard input module is connected with described microprocessor by described input end photoelectric isolation module.
4. Multipath digital quantity input-output unit according to claim 3, is characterized in that, described keyboard input module comprises 8 tunnel industry buttons.
5. Multipath digital quantity input-output unit according to claim 1, is characterized in that, described microprocessor is connected to data memory module.
6. Multipath digital quantity input-output unit according to claim 5, is characterized in that, on described data memory module, is connected to voltage stabilizing diode.
7. Multipath digital quantity input-output unit according to claim 1, is characterized in that, described microprocessor is connected to communication interface.
8. Multipath digital quantity input-output unit according to claim 1, is characterized in that, described microprocessor is connected with relay output module by output terminal photoelectric isolation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617075.5U CN203587997U (en) | 2013-09-30 | 2013-09-30 | Multipath digital value input/output unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617075.5U CN203587997U (en) | 2013-09-30 | 2013-09-30 | Multipath digital value input/output unit |
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| Publication Number | Publication Date |
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| CN203587997U true CN203587997U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320617075.5U Expired - Lifetime CN203587997U (en) | 2013-09-30 | 2013-09-30 | Multipath digital value input/output unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425664A (en) * | 2014-11-14 | 2016-03-23 | 广州电器科学研究院 | Digital quantity I/O control system and method |
| CN107957702A (en) * | 2017-12-29 | 2018-04-24 | 中航电测仪器股份有限公司 | The method of controller electromagnetism interference is launched in hanging and controller is launched in hanging |
-
2013
- 2013-09-30 CN CN201320617075.5U patent/CN203587997U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425664A (en) * | 2014-11-14 | 2016-03-23 | 广州电器科学研究院 | Digital quantity I/O control system and method |
| CN105425664B (en) * | 2014-11-14 | 2018-06-22 | 广州擎天实业有限公司 | A kind of digital quantity I/O control systems and method |
| CN107957702A (en) * | 2017-12-29 | 2018-04-24 | 中航电测仪器股份有限公司 | The method of controller electromagnetism interference is launched in hanging and controller is launched in hanging |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20140507 |
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| CX01 | Expiry of patent term |