CN118275029B - Pressure transmitter signal processing circuit - Google Patents
Pressure transmitter signal processing circuit Download PDFInfo
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- CN118275029B CN118275029B CN202410704143.4A CN202410704143A CN118275029B CN 118275029 B CN118275029 B CN 118275029B CN 202410704143 A CN202410704143 A CN 202410704143A CN 118275029 B CN118275029 B CN 118275029B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/083—Means for indicating or recording, e.g. for remote indication electrical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/02—Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device; Zero-setting means
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Abstract
The invention discloses a signal processing circuit of a pressure transmitter, which relates to the technical field of pressure transmitters and comprises a power supply module, a power supply module and a power supply module, wherein the power supply module is used for providing driving electric energy; the first pressure detection module is used for pressure detection and signal processing; the second pressure detection module is used for pressure detection and signal processing; the zero detection module is used for detecting zero points; the zero state judging module is used for judging whether the levels of the signals output by the zero detection module are the same; the auxiliary pressure detection module is used for electric energy control, pressure detection and signal processing; the state detection module is used for judging the working states of the first pressure detection module and the second pressure detection module; the intelligent control module is used for signal receiving and module control; and the zero point adjusting module is used for carrying out zero setting processing on the first pressure detecting module and the second pressure detecting module. The pressure transmitter signal processing circuit can improve the detection precision and the reliability of detection data, and improve the intelligence of the circuit.
Description
Technical Field
The invention relates to the technical field of pressure transmitters, in particular to a signal processing circuit of a pressure transmitter.
Background
The pressure transmitter is a device for converting pressure into pneumatic signals or electric signals to control and remotely transmit, in order to improve the accuracy of detecting the fluid pressure at the same position, two or more groups of pressure transmitters are generally adopted to jointly detect the fluid, and a single-chip microcomputer is used for receiving signals output by the pressure transmitters and processing and analyzing the signals so as to monitor the fluid pressure, but because the pressure transmitters are easily subjected to factors such as temperature change, mechanical vibration and the like, the pressure transmitters have zero drift before use, the detection is abnormal, the detection is manually regulated by related personnel, the operation means are troublesome, and whether the pressure transmitters have abnormality can not be effectively judged, so that the pressure transmitter needs to be improved.
Disclosure of Invention
The embodiment of the invention provides a signal processing circuit of a pressure transmitter, which aims to solve the problems in the background technology.
According to an embodiment of the present invention, there is provided a pressure transmitter signal processing circuit including: the system comprises a power supply module, a first pressure detection module, a second pressure detection module, a zero point detection module, an intelligent control module, a zero point state judgment module, an auxiliary pressure detection module, a state detection module and a zero point adjustment module;
The power supply module is used for accessing direct-current electric energy and performing electric energy adjustment and outputting first driving electric energy and second driving electric energy;
The first pressure detection module is connected with the power supply module and is used for receiving a first driving signal and detecting pressure, and the first pressure detection module is used for performing voltage conversion and amplification processing on the detected signal and outputting a first detection signal;
the second pressure detection module is connected with the power supply module and is used for receiving a second driving signal and detecting pressure, and the second pressure detection module is used for performing voltage conversion and amplification processing on the detected signal and outputting a second detection signal;
The zero detection module is connected with the first pressure detection module and the second pressure detection module and is used for performing zero detection on the first detection signal and the second detection signal and outputting a first level signal and a second level signal respectively;
The zero state judging module is connected with the zero detection module and is used for outputting a first control signal when the level state of the received first level signal is different from the level state of the received second level signal;
The auxiliary pressure detection module is connected with the power supply module, the zero state judgment module and the state detection module, and is used for receiving the first control signal and the second control signal output by the state detection module, regulating the direct current electric energy, detecting the pressure, performing voltage conversion and amplification on the detected signal and outputting a third detection signal;
the state detection module is connected with the zero detection module and is used for performing zero detection on the third detection signal and outputting a third level signal, performing self-locking processing on the third level signal in a high level state and outputting a second control signal, and outputting a fourth detection signal when the third level signal is in a low level state and the first control signal is received;
The intelligent control module is connected with the first pressure detection module, the state detection module, the second pressure detection module, the zero point detection module, the auxiliary pressure detection module and the zero point state judgment module, and is used for receiving a first detection signal, a second detection signal and a third detection signal, recording pressure data, receiving a fourth detection signal, a first level signal, a second level signal and a first control signal, outputting a first pulse signal when the first control signal and the fourth detection signal are in a high level state and the first level signal is in a low level state, and outputting a second pulse signal when the first control signal and the fourth detection signal are in a high level state and the second level signal is in a low level state;
the zero point adjusting module is connected with the intelligent control module, the first pressure detecting module and the second pressure detecting module and is used for receiving the first pulse signal and carrying out zero setting processing on the first detecting signal and receiving the second pulse signal and carrying out zero setting processing on the second detecting signal.
As still further aspects of the invention: the power module comprises a power interface, a first resistor, a second resistor and a first operational amplifier; the first pressure detection module comprises a first transmitter, a fifth operational amplifier, a second operational amplifier, a first potentiometer, a third resistor and a fifth resistor; the intelligent control module comprises a first controller;
Preferably, the first end of the power interface is connected with the in-phase end of the first operational amplifier, the inverting end of the first operational amplifier is connected with one end of the first resistor and is connected with the second end of the power interface, the third end of the first transmitter, one end of the first potentiometer and the ground end through the second resistor, the output end of the first operational amplifier is connected with the other end of the first resistor and the first end of the first transmitter, the second end and the fourth end of the first transmitter are respectively connected with the inverting end and the in-phase end of the fifth operational amplifier, the output end of the first operational amplifier is connected with the in-phase end of the second operational amplifier, the inverting end of the second operational amplifier is connected with one end of the fifth resistor and is connected with the other end of the first potentiometer and the slide end through the third resistor, and the other end of the fifth resistor is connected with the output end of the second operational amplifier and the IO3 end of the first controller.
As still further aspects of the invention: the power module further comprises a first driving device; the second pressure detection module comprises a second transmitter, a third operational amplifier, a fourth operational amplifier, a ninth resistor, a tenth resistor and a second potentiometer;
Preferably, the input end and the output end of the first driving device are respectively connected with the first end of the power interface and the first end of the second transmitter, the grounding end of the first driving device, one end of the second potentiometer and the third end of the second transmitter are all grounded, the second end and the fourth end of the second transmitter are respectively connected with the inverting end and the in-phase end of the third operational amplifier, the output end of the third operational amplifier is connected with the in-phase end of the fourth operational amplifier, the inverting end of the fourth operational amplifier is connected with one end of the tenth resistor and is connected with the other end of the second potentiometer and the sliding sheet end through the ninth resistor, and the output end of the fourth operational amplifier is connected with the other end of the tenth resistor and the IO6 end of the first controller.
As still further aspects of the invention: the zero detection module comprises a sixth resistor, a seventh resistor, an eleventh resistor, a twelfth resistor, a first optocoupler, a second optocoupler, a first power supply and a second power supply;
preferably, the first end of the first optocoupler is connected with the output end of the second operational amplifier through a sixth resistor, the first end of the second optocoupler is connected with the output end of the fourth operational amplifier through an eleventh resistor, the second end of the first optocoupler and the second end of the second optocoupler are both grounded, the third end of the first optocoupler is connected with the IO4 end of the first control and is connected with the first power supply through a seventh resistor, the third end of the second optocoupler is connected with the IO5 end of the first controller and is connected with the second power supply through a twelfth resistor, and the fourth end of the first optocoupler and the fourth end of the second optocoupler are both grounded.
As still further aspects of the invention: the zero state judging module comprises a first logic chip and a first diode;
Preferably, the end A and the end B of the first logic chip are respectively connected with the third end of the first optical coupler and the third end of the second optical coupler, the end F of the first logic chip is connected with the anode of the first diode and the IO9 end of the first controller, and the cathode of the first diode is connected with the auxiliary pressure detection module.
As still further aspects of the invention: the auxiliary pressure detection module comprises a third power tube, a second driving device, a third transmitter and a signal processing device;
Preferably, the drain electrode of the third power tube is connected with the first end of the power interface, the source electrode of the third power tube is connected with the input end of the second driving device, the output end of the second driving device is connected with the first end of the third transmitter, the second end and the fourth end of the third transmitter are respectively connected with the first end and the second end of the signal processing device, the third end of the signal processing device is connected with the IO7 end of the first controller and the state detection module, the grid electrode of the third power tube is connected with the cathode of the first diode, and the grounding end of the second driving device, the fourth end of the signal processing device and the third end of the second transmitter are all grounded.
As still further aspects of the invention: the state detection module comprises a thirteenth resistor, a fourteenth resistor, a third optocoupler, a third power supply, a first inverter, a signal self-locking device and a second logic chip;
Preferably, one end of the third optocoupler is connected with a third end of the signal processing device through a thirteenth resistor, the third end of the third optocoupler is connected with a third power supply, a fourth end of the third optocoupler is connected with an input end of the first inverter and an input end of the signal self-locking device and is grounded through a fourteenth resistor, an end A and an end B of the second logic chip are respectively connected with an output end of the first inverter and an end F of the first logic chip, and an output end of the signal self-locking device and an end F of the second logic chip are respectively connected with a grid electrode of the third power tube and an IO8 end of the first controller.
Compared with the prior art, the invention has the beneficial effects that: the signal processing circuit of the pressure transmitter carries out pressure detection on fluid at the same position by the first pressure detection module and the second pressure detection module, the zero point state of the first pressure detection module and the zero point state of the second pressure detection module are detected by the zero point state judging module, whether signals output by the first pressure detection module and the second pressure detection module are the same or not is detected by the zero point state judging module, when the signals are different, the auxiliary pressure detection module is controlled to carry out auxiliary pressure detection, the state detecting module and the intelligent control module are matched to judge whether the first pressure detection module or the second pressure detection module needs to be zeroed or whether the auxiliary pressure detection module is needed to replace the first pressure detection module or the second pressure detection module to carry out pressure detection, the detection precision and the reliability of detection data are improved, and the intelligent degree of the circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a signal processing circuit of a pressure transmitter according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of a pressure transmitter signal processing circuit according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of an auxiliary pressure detection module according to an embodiment of the invention.
Fig. 4 is a circuit diagram of a state detection module according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described 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.
In one embodiment, referring to FIG. 1, a pressure transmitter signal processing circuit includes: the system comprises a power supply module 1, a first pressure detection module 2, a second pressure detection module 3, a zero point detection module 4, an intelligent control module 5, a zero point state judgment module 6, an auxiliary pressure detection module 7, a state detection module 8 and a zero point adjustment module 9;
Specifically, the power module 1 is used for connecting direct current electric energy and performing electric energy adjustment, and outputting first driving electric energy and second driving electric energy;
The first pressure detection module 2 is connected with the power supply module 1 and is used for receiving a first driving signal and performing pressure detection, and is used for performing voltage conversion and amplification processing on the detected signal and outputting a first detection signal;
the second pressure detection module 3 is connected with the power supply module 1 and is used for receiving a second driving signal and performing pressure detection, and is used for performing voltage conversion and amplification processing on the detected signal and outputting a second detection signal;
The zero detection module 4 is connected with the first pressure detection module 2 and the second pressure detection module 3, and is used for performing zero detection on the first detection signal and the second detection signal and outputting a first level signal and a second level signal respectively;
A zero state judging module 6, connected to the zero detecting module 4, for outputting a first control signal when the level state of the received first level signal is different from the level state of the received second level signal;
The auxiliary pressure detection module 7 is connected with the power supply module 1, the zero state judgment module 6 and the state detection module 8, and is used for receiving the first control signal and the second control signal output by the state detection module 8, regulating direct current electric energy, detecting pressure, converting voltage of the detected signal, amplifying the detected signal and outputting a third detection signal;
The state detection module 8 is connected with the zero detection module 4, and is used for performing zero detection on the third detection signal and outputting a third level signal, performing self-locking processing on the third level signal in a high level state and outputting a second control signal, and outputting a fourth detection signal when the third level signal is in a low level state and the first control signal is received;
The intelligent control module 5 is connected with the first pressure detection module 2, the state detection module 8, the second pressure detection module 3, the zero point detection module 4, the auxiliary pressure detection module 7 and the zero point state judgment module 6, and is used for receiving a first detection signal, a second detection signal and a third detection signal, recording pressure data, receiving a fourth detection signal, a first level signal, a second level signal and a first control signal, outputting a first pulse signal when the first control signal and the fourth detection signal are in a high level state and the first level signal is in a low level state, and outputting a second pulse signal when the first control signal and the fourth detection signal are in a high level state and the second level signal is in a low level state;
The zero point adjusting module 9 is connected with the intelligent control module 5, the first pressure detecting module 2 and the second pressure detecting module 3, and is used for receiving the first pulse signal and carrying out zero setting processing on the first detecting signal, and is used for receiving the second pulse signal and carrying out zero setting processing on the second detecting signal.
In a specific embodiment, the power module 1 may be a power circuit formed by a power interface, an operational amplifier, a resistor, etc., and may be connected to and regulate dc power to provide driving power required by the first pressure detection module 2, the second pressure detection module 3, and the auxiliary pressure detection module 7; the first pressure detection module 2 can adopt a first pressure detection circuit composed of a pressure transmitter, a resistor, an operational amplifier and the like, can detect the fluid pressure, performs voltage conversion and amplification treatment on detected signals, and can adjust the output voltage value; the second pressure detection module 3 can adopt a second pressure detection circuit composed of a pressure transmitter, a resistor, an operational amplifier and the like, can detect the pressure of the fluid, performs voltage conversion and amplification treatment on the detected signal, and can adjust the output voltage value to detect the pressure condition of the same fluid with the first pressure detection module 2; the zero detection module 4 can adopt a zero detection circuit composed of a photoelectric coupler, a resistor and the like, and can detect the zero state of the first pressure detection module 2 and the second pressure detection module 3; the intelligent control module 5 can adopt an intelligent control circuit formed by a singlechip, integrates a plurality of components such as an arithmetic unit, a controller, a memory, an input/output unit and the like, and realizes the functions of signal processing, data storage, module control, timing control and the like; the zero state judging module 6 can adopt a zero state judging circuit composed of a logic chip and a diode, and can detect whether signals output by the zero detection module 4 are of the same level; the auxiliary pressure detection module 7 can adopt an auxiliary pressure detection circuit formed by a power tube, a pressure transmitter, a signal processing device and the like to complete transmission and adjustment of electric energy, perform pressure detection on fluid, perform voltage conversion and amplification treatment on detection signals, and detect the pressure condition of the same fluid with the first pressure detection module 2; the state detection module 8 can adopt a state detection circuit composed of a photoelectric coupler, a logic core chip, a resistor and the like, and can detect the zero point state of the auxiliary pressure detection module 7 and judge the states of the first pressure detection module 2 and the second pressure detection module 3, namely, faults and zero point drift; the zero point adjusting module 9 can adopt a zero point adjusting circuit formed by a power tube and a resistor to perform zero point adjustment on the first pressure detecting module 2 and the second pressure detecting module 3.
In another embodiment, referring to fig. 1, 2, 3 and 4, the power module 1 includes a power interface, a first resistor R1, a second resistor R2 and a first operational amplifier OP1; the first pressure detection module 2 comprises a first transmitter IC1, a fifth operational amplifier OP5, a second operational amplifier OP2, a first potentiometer RP1, a third resistor R3 and a fifth resistor R5; the intelligent control module 5 comprises a first controller U1;
Specifically, the first end of the power interface is connected to the in-phase end of the first operational amplifier OP1, the inverting end of the first operational amplifier OP1 is connected to one end of the first resistor R1 and is connected to the second end of the power interface through the second resistor R2, the third end of the first transmitter IC1, one end of the first potentiometer RP1 and the ground end, the output end of the first operational amplifier OP1 is connected to the other end of the first resistor R1 and the first end of the first transmitter IC1, the second end and the fourth end of the first transmitter IC1 are respectively connected to the inverting end and the in-phase end of the fifth operational amplifier OP5, the output end of the first operational amplifier OP1 is connected to the in-phase end of the second operational amplifier OP2, the inverting end of the second operational amplifier OP2 is connected to one end of the fifth resistor R5 and is connected to the other end of the first potentiometer RP1 and the slide end through the third resistor R3, and the other end of the fifth resistor R5 is connected to the output end of the second operational amplifier OP2 and the 3 end of the first controller U1.
In a specific embodiment, the dc power voltage connected to the power interface is 5V; the first operational amplifier OP1 may be an ADA409 operational amplifier, and is matched with the first resistor R1 and the second resistor R2 to adjust the input electric energy, and provide driving electric energy for the first transmitter IC 1; the first transducer IC1 can be a piezoresistive pressure transducer; the fifth operational amplifier OP5 and the sixth operational amplifier may be an LT1101 operational amplifier and an LT1078 operational amplifier, respectively, and cooperate with the third resistor R3, the fifth resistor R5 and the first potentiometer RP1 to perform voltage conversion and amplification, where the first potentiometer RP1 may adjust the voltage value output by the second operational amplifier OP 2; the first controller U1 can be an STM32 singlechip.
Further, the power module 1 further comprises a first driving device; the second pressure detection module 3 comprises a second transmitter IC2, a third operational amplifier OP3, a fourth operational amplifier OP4, a ninth resistor R9, a tenth resistor R10 and a second potentiometer RP2;
Specifically, the input end and the output end of the first driving device are respectively connected with the first end of the power interface and the first end of the second transmitter IC2, the grounding end of the first driving device, one end of the second potentiometer RP2 and the third end of the second transmitter IC2 are all grounded, the second end and the fourth end of the second transmitter IC2 are respectively connected with the inverting end and the non-inverting end of the third operational amplifier OP3, the output end of the third operational amplifier OP3 is connected with the non-inverting end of the fourth operational amplifier OP4, the inverting end of the fourth operational amplifier OP4 is connected with one end of the tenth resistor R10 and is connected with the other end of the second potentiometer RP2 and the slide sheet end through the ninth resistor R9, and the output end of the fourth operational amplifier OP4 is connected with the other end of the tenth resistor R10 and the IO6 end of the first controller U1.
In a specific embodiment, the circuit composition structure of the first driving device is the same as the circuit composition structure of the first operational amplifier OP1, the first resistor R1 and the second resistor R2; the second transmitter IC2 is the same as the first transmitter IC1 in type; the selection of the third operational amplifier OP3 and the fourth operational amplifier OP4 is the same as that of the fifth operational amplifier OP5 and the second operational amplifier OP2, and the voltage value output by the fourth operational amplifier OP4 can be adjusted by the second potentiometer RP 2.
Further, the zero detection module 4 includes a sixth resistor R6, a seventh resistor R7, an eleventh resistor R11, a twelfth resistor R12, a first optocoupler J1, a second optocoupler J2, a first power source VCC1, and a second power source VCC2;
Specifically, a first end of the first optocoupler J1 is connected to an output end of the second OP2 through a sixth resistor R6, a first end of the second optocoupler J2 is connected to an output end of the fourth OP4 through an eleventh resistor R11, both a second end of the first optocoupler J1 and a second end of the second optocoupler J2 are grounded, a third end of the first optocoupler J1 is connected to a first controlled IO4 end and to the first power VCC1 through a seventh resistor R7, a third end of the second optocoupler J2 is connected to an IO5 end of the first controller U1 and to the second power VCC2 through a twelfth resistor R12, and both a fourth end of the first optocoupler J1 and a fourth end of the second optocoupler J2 are grounded.
In a specific embodiment, the first optocoupler J1 and the second optocoupler J2 may be PC817 optocouplers, respectively detect voltage values output by the second OP2 and the fourth OP4, and output a first level signal and a second level signal in a high level state when the voltages output by the second OP2 and the fourth OP4 are zero.
Further, the zero state judging module 6 includes a first logic chip U2 and a first diode D1;
Specifically, the end a and the end B of the first logic chip U2 are respectively connected to the third end of the first optocoupler J1 and the third end of the second optocoupler J2, the end F of the first logic chip U2 is connected to the anode of the first diode D1 and the end IO9 of the first controller U1, and the cathode of the first diode D1 is connected to the auxiliary pressure detection module 7.
In a specific embodiment, the first logic chip U2 may be an exclusive or gate chip.
Further, the auxiliary pressure detection module 7 comprises a third power tube Q3, a second driving device, a third transmitter IC3 and a signal processing device;
Specifically, the drain electrode of the third power tube Q3 is connected to the first end of the power interface, the source electrode of the third power tube Q3 is connected to the input end of the second driving device, the output end of the second driving device is connected to the first end of the third transmitter IC3, the second end and the fourth end of the third transmitter IC3 are respectively connected to the first end and the second end of the signal processing device, the third end of the signal processing device is connected to the IO7 end of the first controller U1 and the state detection module 8, the gate electrode of the third power tube Q3 is connected to the cathode of the first diode D1, and the ground end of the second driving device, the fourth end of the signal processing device and the third end of the second transmitter IC2 are all grounded.
In a specific embodiment, the third power tube Q3 may be an N-channel field effect tube for performing power transmission control; the circuit composition structure of the second driving device is the same as that of the first driving device; the third transmitter IC3 is the same as the first transmitter IC1 in type; the circuit composition structure of the signal processing device is the same as that of the fifth operational amplifier OP5, the second operational amplifier OP2, the third resistor R3, the fifth resistor R5 and the first potentiometer RP 1.
Further, the state detection module 8 includes a thirteenth resistor R13, a fourteenth resistor R14, a third optocoupler J3, a third power VCC3, a first inverter U4, a signal self-locking device, and a second logic chip U3;
Specifically, one end of the third optocoupler J3 is connected to a third end of the signal processing device through a thirteenth resistor R13, the third end of the third optocoupler J3 is connected to a third power supply VCC3, a fourth end of the third optocoupler J3 is connected to an input end of the first inverter U4 and an input end of the signal self-locking device and is grounded through a fourteenth resistor R14, an a end and a B end of the second logic chip U3 are respectively connected to an output end of the first inverter U4 and an F end of the first logic chip U2, and an output end of the signal self-locking device and an F end of the second logic chip U3 are respectively connected to a gate of the third power tube Q3 and an IO8 end of the first controller U1.
In a specific embodiment, the third optocoupler J3 may be a PC817 optocoupler, and outputs a third level signal in a low level state when the voltage output by the signal processing device is zero; the signal self-locking device can be composed of a triode and a resistor and used for self-locking an input high-level signal; the first inverter U4 may be a non-gate chip, and the second logic chip U3 may be an and gate chip.
In the signal processing circuit of the pressure transmitter, a power interface is connected with direct current electric energy, a first operational amplifier OP1, a first resistor R1, a second resistor R2 and a first driving device are used for carrying out voltage processing, driving electric energy is respectively provided for the first transmitter IC1 and the second transmitter IC2, so that the first transmitter IC1 and the second transmitter IC2 carry out pressure detection on the same fluid, a fifth operational amplifier OP5, a second operational amplifier OP2, a third resistor R3, a fifth resistor R5 and a first potentiometer RP1 are used for carrying out voltage conversion and amplification processing on signals output by the first transmitter IC1, a third operational amplifier OP4, a ninth resistor R9, a tenth resistor R10 and a second potentiometer RP2 are used for carrying out voltage conversion and amplification processing on signals output by the second transmitter IC2, so that IO3 ends and IO6 ends of the first controller U1 receive and record, meanwhile, the first optical coupler J1 and the second optical coupler J2 respectively detect the voltage values of the output signals of the second operational amplifier OP2 and the fourth operational amplifier OP4, when the output voltage of one operational amplifier is zero and the output voltage of the other operational amplifier is not zero in the second operational amplifier OP2 and the fourth operational amplifier OP4, the detected signals are abnormal, the first logic chip U2 outputs high level and controls the third power tube Q3 to be conducted, the second driving device regulates the direct current electric energy connected with the power interface and drives the third transmitter IC3 to detect the pressure of the same fluid, the signal processing device carries out voltage conversion and amplification processing, when the voltage of the signal output by the signal processing device is zero, the third optical coupler J3 is cut off, at the moment, if the first optical coupler J1 is conducted, the IO1 end of the first controller U1 controls the conduction degree of the first power tube, the signal output by the second operational amplifier OP2 is zeroed, if the second optical coupler J2 is conducted, the IO2 end of the second controller controls the conduction degree of the second power tube, the signal output by the fourth operational amplifier OP4 is zeroed, if the signal output by the signal processing device is not zero, the third optocoupler J3 is conducted, the signal self-locking device self-locks and outputs high level, the third power tube Q3 is controlled to be conducted, the third transmitter IC3 is controlled to keep a pressure detection state, and the pressure detection state is received by the IO7 end of the first controller U1.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. A pressure transmitter signal processing circuit, characterized by:
The pressure transmitter signal processing circuit includes: the system comprises a power supply module, a first pressure detection module, a second pressure detection module, a zero point detection module, an intelligent control module, a zero point state judgment module, an auxiliary pressure detection module, a state detection module and a zero point adjustment module;
the power supply module is used for accessing direct-current electric energy and performing electric energy adjustment and outputting first driving electric energy and second driving electric energy;
The first pressure detection module is connected with the power supply module and is used for receiving a first driving signal and detecting pressure, and the first pressure detection module is used for performing voltage conversion and amplification processing on the detected signal and outputting a first detection signal;
The second pressure detection module is connected with the power supply module and is used for receiving a second driving signal and detecting pressure, and the second pressure detection module is used for performing voltage conversion and amplification processing on the detected signal and outputting a second detection signal;
The zero detection module is connected with the first pressure detection module and the second pressure detection module, and is used for performing zero detection on the first detection signal and the second detection signal and outputting a first level signal and a second level signal respectively;
The zero state judging module is connected with the zero detection module and is used for outputting a first control signal when the level state of the received first level signal is different from the level state of the received second level signal;
The auxiliary pressure detection module is connected with the power supply module, the zero state judgment module and the state detection module, and is used for receiving the first control signal and the second control signal output by the state detection module, regulating direct current electric energy, detecting pressure, converting voltage of the detected signal, amplifying the detected signal and outputting a third detection signal;
The state detection module is connected with the zero detection module and is used for performing zero detection on a third detection signal and outputting a third level signal, performing self-locking processing on the third level signal in a high level state and outputting a second control signal, and outputting a fourth detection signal when the third level signal is in a low level state and the first control signal is received;
The intelligent control module is connected with the first pressure detection module, the state detection module, the second pressure detection module, the zero point detection module, the auxiliary pressure detection module and the zero point state judgment module, and is used for receiving a first detection signal, a second detection signal and a third detection signal, recording pressure data, receiving a fourth detection signal, a first level signal, a second level signal and a first control signal, outputting a first pulse signal when the first control signal and the fourth detection signal are in a high level state and the first level signal is in a low level state, and outputting a second pulse signal when the first control signal and the fourth detection signal are in a high level state and the second level signal is in a low level state;
the zero point adjusting module is connected with the intelligent control module, the first pressure detecting module and the second pressure detecting module and is used for receiving the first pulse signal and carrying out zero setting processing on the first detecting signal and receiving the second pulse signal and carrying out zero setting processing on the second detecting signal.
2. The pressure transmitter signal processing circuit of claim 1 wherein the power module comprises a power interface, a first resistor, a second resistor, and a first op-amp; the first pressure detection module comprises a first transmitter, a fifth operational amplifier, a second operational amplifier, a first potentiometer, a third resistor and a fifth resistor; the intelligent control module comprises a first controller;
The first end of power interface connects the homophase end of first fortune and puts, the inverting terminal of first fortune is connected the one end of first resistance and is connected the second end of power interface, the third end of first changer, the one end and the ground terminal of first potentiometre through the second resistance, the output of first fortune is put the other end of first resistance and the first end of first changer, the inverting terminal and the homophase end of fifth fortune are put respectively connected to the second end of first changer and fourth end, the homophase end of second fortune is put is connected to the output of first fortune, the inverting terminal of second fortune is put the one end of fifth resistance and is connected the other end and the gleitbretter end of first potentiometre through the third resistance, the output of second fortune is put and the IO3 end of first controller are connected to the other end of fifth resistance.
3. The pressure transmitter signal processing circuit of claim 2 wherein the power module further comprises a first drive means; the second pressure detection module comprises a second transmitter, a third operational amplifier, a fourth operational amplifier, a ninth resistor, a tenth resistor and a second potentiometer;
The input end and the output end of the first driving device are respectively connected with the first end of the power interface and the first end of the second transmitter, the grounding end of the first driving device, one end of the second potentiometer and the third end of the second transmitter are grounded, the second end and the fourth end of the second transmitter are respectively connected with the inverting end and the in-phase end of the third operational amplifier, the output end of the third operational amplifier is connected with the in-phase end of the fourth operational amplifier, the inverting end of the fourth operational amplifier is connected with one end of the tenth resistor and is connected with the other end of the second potentiometer and the sliding sheet end through the ninth resistor, and the output end of the fourth operational amplifier is connected with the other end of the tenth resistor and the IO6 end of the first controller.
4. The pressure transmitter signal processing circuit of claim 3 wherein the zero detection module comprises a sixth resistor, a seventh resistor, an eleventh resistor, a twelfth resistor, a first optocoupler, a second optocoupler, a first power source, and a second power source;
The first end of the first optocoupler is connected with the output end of the second operational amplifier through a sixth resistor, the first end of the second optocoupler is connected with the output end of the fourth operational amplifier through an eleventh resistor, the second end of the first optocoupler and the second end of the second optocoupler are both grounded, the third end of the first optocoupler is connected with the IO4 end of the first control and is connected with a first power supply through a seventh resistor, the third end of the second optocoupler is connected with the IO5 end of the first controller and is connected with a second power supply through a twelfth resistor, and the fourth end of the first optocoupler and the fourth end of the second optocoupler are both grounded.
5. The pressure transmitter signal processing circuit of claim 4 wherein the zero state determination module comprises a first logic chip and a first diode;
The end A and the end B of the first logic chip are respectively connected with the third end of the first optical coupler and the third end of the second optical coupler, the end F of the first logic chip is connected with the anode of the first diode and the IO9 end of the first controller, and the cathode of the first diode is connected with the auxiliary pressure detection module.
6. The pressure transmitter signal processing circuit of claim 5 wherein the auxiliary pressure sensing module comprises a third power tube, a second drive device, a third transmitter, and a signal processing device;
The drain electrode of the third power tube is connected with the first end of the power interface, the source electrode of the third power tube is connected with the input end of the second driving device, the output end of the second driving device is connected with the first end of the third transmitter, the second end and the fourth end of the third transmitter are respectively connected with the first end and the second end of the signal processing device, the third end of the signal processing device is connected with the IO7 end of the first controller and the state detection module, the grid electrode of the third power tube is connected with the cathode of the first diode, and the grounding end of the second driving device, the fourth end of the signal processing device and the third end of the second transmitter are all grounded.
7. The pressure transmitter signal processing circuit of claim 6, wherein the status detection module comprises a thirteenth resistor, a fourteenth resistor, a third optocoupler, a third power supply, a first inverter, a signal latching device, and a second logic chip;
one end of the third optical coupler is connected with a third end of the signal processing device through a thirteenth resistor, the third end of the third optical coupler is connected with a third power supply, a fourth end of the third optical coupler is connected with an input end of the first inverter and an input end of the signal self-locking device and is grounded through the fourteenth resistor, an A end and a B end of the second logic chip are respectively connected with an output end of the first inverter and an F end of the first logic chip, and an output end of the signal self-locking device and an F end of the second logic chip are respectively connected with a grid electrode of the third power tube and an IO8 end of the first controller.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2661745A1 (en) * | 1990-05-04 | 1991-11-08 | Onera (Off Nat Aerospatiale) | Method and device for measuring non-steady state pressures |
| CN217424394U (en) * | 2022-08-16 | 2022-09-13 | 成都英华陆装智控科技有限公司 | Zero-full-position adjusting system of sensor |
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| JP3115358B2 (en) * | 1991-08-19 | 2000-12-04 | トキコ株式会社 | Pressure control device |
| JP3863505B2 (en) * | 2003-06-20 | 2006-12-27 | 忠弘 大見 | Pressure sensor, pressure control device, and automatic zero point correction device for pressure type flow rate control device |
| US7706995B2 (en) * | 2007-04-16 | 2010-04-27 | Mks Instr Inc | Capacitance manometers and methods relating to auto-drift correction |
| US10466127B2 (en) * | 2010-11-03 | 2019-11-05 | Avgi Engineering, Inc. | Differential pressure transmitter with intrinsic verification |
| US10845394B2 (en) * | 2017-12-04 | 2020-11-24 | Guildline Instruments Limited | Null detector devices and systems employing same |
| US11976991B2 (en) * | 2021-05-24 | 2024-05-07 | Hexmodal Technologies LLC | Pressure monitoring system |
| WO2023089446A1 (en) * | 2021-11-16 | 2023-05-25 | Nextnav, Llc | Field calibration of reference weather stations |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2661745A1 (en) * | 1990-05-04 | 1991-11-08 | Onera (Off Nat Aerospatiale) | Method and device for measuring non-steady state pressures |
| CN217424394U (en) * | 2022-08-16 | 2022-09-13 | 成都英华陆装智控科技有限公司 | Zero-full-position adjusting system of sensor |
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