CN213986290U - Electrochemical sensor array output detection system - Google Patents
Electrochemical sensor array output detection system Download PDFInfo
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- CN213986290U CN213986290U CN202021744874.5U CN202021744874U CN213986290U CN 213986290 U CN213986290 U CN 213986290U CN 202021744874 U CN202021744874 U CN 202021744874U CN 213986290 U CN213986290 U CN 213986290U
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Abstract
The utility model discloses an electrochemical sensor array output detection system, which comprises a singlechip module and a multi-channel analog-to-digital converter circuit, the multi-channel analog-to-digital converter circuit converts the multi-channel analog signals into digital signals and transmits the digital signals to the single chip microcomputer module, the output quantity of the electrochemical sensor can be accurately measured, the SF6 gas decomposition product component can be conveniently and correctly judged, and fault diagnosis and state evaluation of equipment are facilitated.
Description
Technical Field
The utility model relates to a signal detection field, in particular to electrochemical sensor array output detecting system.
Background
In the power industry, GIS is widely used because of its small footprint and high reliability. Early failures of GIS are difficult to discover due to their closed structure. At present, electrochemical sensors with excellent performance are generally adopted to detect SF6 gas decomposition products such as H in GIS equipment2S、SO2And performing fault diagnosis and state evaluation on the equipment. Accurate measurement of the output of the electrochemical sensor is critical to the correct determination of the SF6 gas decomposition product composition.
Disclosure of Invention
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an electrochemical sensor array output detecting system, can realize the output quantity of accurate measurement electrochemical sensor, be convenient for correctly judge SF6 gaseous decomposition product component, be favorable to carrying out fault diagnosis and state aassessment to equipment.
The embodiment of the utility model provides an electrochemical sensor array output detecting system, include:
the singlechip module is used for processing and transmitting the received output data of the sensor array;
the output end of the multi-channel analog-to-digital converter circuit is connected with the input end of the single chip microcomputer module and used for converting the multi-channel analog signals into digital signals and transmitting the digital signals to the single chip microcomputer module;
the sensor signal processing circuit comprises a resistance voltage division circuit, a signal filtering circuit and a single-end to differential circuit which are connected in sequence, wherein the input end of the resistance voltage division circuit is connected with the output end of the sensor, and the output end of the single-end to differential circuit is connected with the input end of the multi-channel analog-to-digital converter circuit;
the reference signal processing circuit comprises a signal filter circuit and a single-end to differential circuit which are sequentially connected, wherein the input end of the signal filter circuit is connected with a reference voltage, and the single-end to differential circuit is connected with the input end of the multi-channel analog-to-digital converter circuit.
According to some embodiments of the utility model, resistance bleeder circuit includes reference voltage source, sensor output resistance signal reception port, first resistance and partial pressure output, reference voltage source connects the one end of sensor output resistance signal reception port, the other end of sensor output resistance signal reception port is connected the one end of first resistance with the partial pressure output, the other end ground connection of first resistance, sensor output resistance signal reception port is used for being connected with the output of sensor.
According to some embodiments of the present invention, the signal filter circuit comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first operational amplifier and a second operational amplifier, the voltage dividing output is connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third resistor and one end of the first capacitor, the other end of the third resistor is connected to one end of the second capacitor and the same phase end of the first operational amplifier, the other end of the second capacitor is grounded, the other end of the first capacitor and the opposite phase end of the first operational amplifier are both connected to the output end of the first operational amplifier, the output end of the first operational amplifier is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the fifth resistor and one end of the third capacitor, the other end of the fifth resistor is connected with one end of the fourth capacitor and the in-phase end of the second operational amplifier, the other end of the fourth capacitor is grounded, the other end of the third capacitor and the inverting end of the second operational amplifier are both connected to the output end of the second operational amplifier, and the output end of the second operational amplifier serves as the output end of the signal filtering circuit.
According to some embodiments of the present invention, the single-end-to-differential circuit comprises a common-mode voltage source, a third operational amplifier, a fourth operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, and a ninth resistor, the common-mode voltage source is connected to a non-inverting terminal of the third operational amplifier, an inverting terminal of the third operational amplifier is connected to an output terminal of the third operational amplifier, an output terminal of the signal filtering circuit is connected to one terminal of the sixth resistor, the other terminal of the sixth resistor is connected to a non-inverting terminal of the fourth operational amplifier and one terminal of the ninth resistor, the other terminal of the ninth resistor is connected to an output terminal of the third operational amplifier, one terminal of the seventh resistor is grounded, the other terminal of the seventh resistor is connected to one terminal of the eighth resistor and an inverting terminal of the fourth operational amplifier, the other terminal of the eighth resistor is connected to an output terminal of the fourth operational amplifier, and the output end of the third operational amplifier and the output end of the fourth operational amplifier are used as differential signal output ends of the single-end to differential circuit.
According to the utility model discloses a some embodiments still include power module, display module and communication module, power module connects single chip microcomputer module multichannel analog to digital converter circuit multichannel sensor signal processing circuit with reference signal processing circuit, display module with communication module connects respectively single chip microcomputer module.
According to the utility model discloses electrochemical sensor array output detecting system that provides has following beneficial effect at least: the reference signal processing circuit outputs a reference signal to the multichannel analog-to-digital converter circuit after acquiring a reference voltage and processing the reference voltage by the signal filter circuit and the single-end to differential circuit, the sensor signals output by the plurality of sensor arrays are respectively output to the resistance voltage division circuit of the multi-channel sensor signal processing circuit, the resistance voltage division circuit outputs a divided voltage signal and outputs a corresponding sensor analog signal to the multichannel analog-to-digital converter circuit after processing the divided voltage signal by the signal filter circuit and the single-end to differential circuit, the multichannel analog-to-digital converter circuit converts the multi-channel analog signal into a digital signal and transmits the digital signal to the single chip microcomputer module, the output quantity of the electrochemical sensor can be accurately measured, the SF6 gas decomposition product component can be conveniently and correctly judged, and fault diagnosis and state evaluation of equipment are facilitated.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a block diagram of an electrochemical sensor array output detection system according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a multi-channel analog-to-digital converter circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a resistance voltage divider circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a signal filter circuit provided by an embodiment of the present invention;
fig. 5 is a schematic diagram of a single-ended to differential circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 and 2, an embodiment of the present invention provides an electrochemical sensor array output detection system, including:
the single chip microcomputer module 10 is used for processing and transmitting the received sensor array output data;
the output end of the multi-channel analog-to-digital converter circuit 20 is connected with the input end of the single chip microcomputer module 10 and is used for converting the multi-channel analog signals into digital signals and transmitting the digital signals to the single chip microcomputer module 10;
the sensor signal processing circuit 30 comprises a resistance voltage division circuit 40, a signal filter circuit 50 and a single-end to differential circuit 60 which are connected in sequence, wherein the input end of the resistance voltage division circuit 40 is connected with the output end of the sensor, and the output end of the single-end to differential circuit 60 is connected with the input end of the multi-channel analog-to-digital converter circuit 20;
the reference signal processing circuit 70 includes a signal filter circuit 50 and a single-ended to differential circuit 60 connected in sequence, wherein an input terminal of the signal filter circuit 50 is connected to a reference voltage, and the single-ended to differential circuit 60 is connected to an input terminal of the multi-channel analog-to-digital converter circuit 20.
Referring to fig. 3, according to some embodiments of the present invention, the resistance voltage divider circuit 40 includes a reference voltage source, a sensor output resistance signal receiving port 41, a first resistance R1 and a voltage dividing output end, the reference voltage source is connected to one end of the sensor output resistance signal receiving port 41, one end of the first resistance R1 and the voltage dividing output end are connected to the other end of the sensor output resistance signal receiving port 41, the other end of the first resistance R1 is grounded, and the sensor output resistance signal receiving port 41 is used for being connected to the output end of the sensor. The sensor output resistance signal receiving port 41 receives a resistance signal output by the sensor, the resistance signal and the first resistor R1 are connected in series between the reference voltage source and the ground terminal, serial voltage division is performed on the reference voltage source, and the divided voltage signal is output to the signal filtering circuit 50 from the voltage division output terminal.
Referring to fig. 4, according to some embodiments of the present invention, the signal filter circuit 50 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first operational amplifier a1 and a second operational amplifier a2, a voltage dividing output terminal is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third resistor R3 and one end of the first capacitor C1, the other end of the third resistor R3 is connected to one end of the second capacitor C2 and the non-inverting end of the first operational amplifier a1, the other end of the second capacitor C2 is grounded, the other end of the first capacitor C1 and the inverting end of the first operational amplifier a1 are both connected to the output terminal of the first operational amplifier a1, the output terminal of the first operational amplifier a1 is connected to one end of the fourth resistor R1, and one end of the third resistor R1 and the third capacitor C1, the other end of the fifth resistor R5 is connected to one end of the fourth capacitor C4 and the non-inverting end of the second operational amplifier a2, the other end of the fourth capacitor C4 is grounded, the other end of the third capacitor C3 and the inverting end of the second operational amplifier a2 are both connected to the output end of the second operational amplifier a2, and the output end of the second operational amplifier a2 is used as the output end of the signal filter circuit 50. The signal filtering circuit 50 formed by the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the first operational amplifier A1 and the second operational amplifier A2 is a fourth-order Butterworth filter, and can effectively inhibit the interference of high-frequency signals.
Referring to fig. 5, according to some embodiments of the present invention, the single-ended to differential circuit 60 includes a common-mode voltage source, a third operational amplifier A3, a fourth operational amplifier A4, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9, the common-mode voltage source is connected to a non-inverting terminal of the third operational amplifier A3, an inverting terminal of the third operational amplifier A3 is connected to an output terminal of the third operational amplifier A3, an output terminal of the signal filtering circuit 50 is connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected to a non-inverting terminal of the fourth operational amplifier A4 and one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to an output terminal of the third operational amplifier A3, one end of the seventh resistor R7 is grounded, the other end of the seventh resistor R7 is connected to one end of the eighth resistor R8 and an inverting terminal of the fourth operational amplifier A4, the other end of the fourth resistor R8 is connected to an inverting terminal of the fourth operational amplifier 4, the output terminal of the third operational amplifier A3 and the output terminal of the fourth operational amplifier a4 are used as differential signal output terminals of the single-ended to differential circuit 60. The single-ended to differential circuit 60 can convert the single-ended signal output by the signal filter circuit 50 into a differential signal, so as to effectively suppress common-mode interference and improve the resolution of the system.
Referring to fig. 1, according to some embodiments of the present invention, the display device further includes a power module 100, a display module 80 and a communication module 90, the power module 100 connects the single chip module 10, the multi-channel analog-to-digital converter circuit 20, the multi-channel sensor signal processing circuit 30 and the reference signal processing circuit 70, and the display module 80 and the communication module 90 are respectively connected to the single chip module 10. The single chip module 10 is used as a main control chip to obtain and process data of the multi-channel analog-to-digital converter circuit 20, display the result on the display module 80 and transmit the data to the upper computer in real time through the communication module 90.
The control of the multi-channel analog-to-digital converter circuit 20 by the single chip microcomputer module 10 is divided into two aspects of channel control and read data control. Firstly, a channel to be measured is determined by controlling a channel selection pin of the multi-channel analog-to-digital converter circuit 20, and then related pins are correctly controlled according to the working time sequence of the multi-channel analog-to-digital converter circuit 20 to obtain measurement data; the output quantity of the electrochemical sensor changes slowly, the method for measuring the output of the plurality of electrochemical sensor arrays by switching the analog-to-digital converter channels can meet the measurement requirement, and the requirement for drawing the output change curve of each sensor can be met.
Wherein, the measurement accuracy of the measurement system can be adjusted according to requirements. Increasing the accuracy of the first resistor R1 and the resolution of the multi-channel analog-to-digital converter circuit 20 may improve measurement accuracy. It is to be noted that, under the requirement of high precision, the accuracy of external noise interference is greatly affected, so that a good shielding measure is required for the multi-channel resistance measurement system.
According to the electrochemical sensor array output detection system provided by the embodiment of the present invention, the reference signal processing circuit 70 outputs the reference signal to the multi-channel analog-to-digital converter circuit 20 after acquiring the reference voltage and processing the reference signal by the signal filter circuit 50 and the single-ended to differential circuit 60, the sensor signals output by the plurality of sensor arrays are respectively output to the resistance voltage divider circuit 40 of the multi-channel sensor signal processing circuit 30, the resistance voltage divider circuit 40 outputs the divided voltage signal and outputs the corresponding sensor analog signal to the multi-channel analog-to-digital converter circuit 20 after processing the divided voltage signal by the signal filter circuit 50 and the single-ended to differential circuit 60, the multi-channel analog-to-digital converter circuit 20 converts the multi-channel analog signal into the digital signal and transmits the digital signal to the single chip module 10, thereby accurately measuring the output of the electrochemical sensor and accurately judging the components of the SF6 gas decomposition products, the method is beneficial to fault diagnosis and state evaluation of the equipment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.
Claims (5)
1. An electrochemical sensor array output detection system, comprising:
the singlechip module (10) is used for processing and transmitting the received sensor array output data;
the output end of the multi-channel analog-to-digital converter circuit (20) is connected with the input end of the single chip microcomputer module (10) and is used for converting the multi-channel analog signals into digital signals and transmitting the digital signals to the single chip microcomputer module (10);
the sensor signal processing circuit (30) comprises a resistance voltage division circuit (40), a signal filter circuit (50) and a single-end to differential circuit (60) which are sequentially connected, wherein the input end of the resistance voltage division circuit (40) is connected with the output end of the sensor, and the output end of the single-end to differential circuit (60) is connected with the input end of the multi-channel analog-to-digital converter circuit (20);
the reference signal processing circuit (70) comprises a signal filtering circuit (50) and a single-end to differential circuit (60) which are sequentially connected, wherein the input end of the signal filtering circuit (50) is connected with a reference voltage, and the single-end to differential circuit (60) is connected with the input end of the multi-channel analog-to-digital converter circuit (20).
2. The electrochemical sensor array output detection system of claim 1, wherein the resistance voltage divider circuit (40) comprises a reference voltage source, a sensor output resistance signal receiving port (41), a first resistor (R1) and a voltage dividing output, the reference voltage source is connected to one end of the sensor output resistance signal receiving port (41), the other end of the sensor output resistance signal receiving port (41) is connected to one end of the first resistor (R1) and the voltage dividing output, the other end of the first resistor (R1) is grounded, and the sensor output resistance signal receiving port (41) is used for being connected to an output of a sensor.
3. The electrochemical sensor array output detection system according to claim 2, wherein the signal filter circuit (50) comprises a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), a first operational amplifier (a 1) and a second operational amplifier (a 2), the voltage division output end is connected with one end of the second resistor (R2), the other end of the second resistor (R2) is connected with one end of the third resistor (R3) and one end of the first capacitor (C1), the other end of the third resistor (R3) is connected with one end of the second capacitor (C2) and the same-phase end of the first operational amplifier (a 1), the other end of the second capacitor (C2) is grounded, and the other end of the first capacitor (C6327) and the opposite-phase operational amplifier (a 3673726) are both connected with the same-phase end of the first operational amplifier (a 1) To an output terminal of the first operational amplifier (a 1), an output terminal of the first operational amplifier (a 1) is connected to one terminal of the fourth resistor (R4), the other terminal of the fourth resistor (R4) is connected to one terminal of the fifth resistor (R5) and one terminal of the third capacitor (C3), the other terminal of the fifth resistor (R5) is connected to one terminal of the fourth capacitor (C4) and the same-phase terminal of the second operational amplifier (a 2), the other terminal of the fourth capacitor (C4) is grounded, the other terminal of the third capacitor (C3) and the opposite-phase terminal of the second operational amplifier (a 2) are both connected to the output terminal of the second operational amplifier (a 2), and the output terminal of the second operational amplifier (a 2) serves as an output terminal of the signal filter circuit (50).
4. The electrochemical sensor array output detection system of claim 1, wherein the single-ended to differential circuit (60) comprises a common-mode voltage source, a third operational amplifier (A3), a fourth operational amplifier (A4), a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8), and a ninth resistor (R9), the common-mode voltage source is connected to a non-inverting terminal of the third operational amplifier (A3), an inverting terminal of the third operational amplifier (A3) is connected to an output terminal of the third operational amplifier (A3), an output terminal of the signal filtering circuit (50) is connected to one terminal of the sixth resistor (R6), the other terminal of the sixth resistor (R6) is connected to a non-inverting terminal of the fourth operational amplifier (A4) and one terminal of the ninth resistor (R9), and the other terminal of the ninth resistor (R9) is connected to an output terminal of the third operational amplifier (A3), one end of the seventh resistor (R7) is grounded, the other end of the seventh resistor (R7) is connected to one end of the eighth resistor (R8) and the inverting terminal of the fourth operational amplifier (a 4), the other end of the eighth resistor (R8) is connected to the output terminal of the fourth operational amplifier (a 4), and the output terminal of the third operational amplifier (A3) and the output terminal of the fourth operational amplifier (a 4) are used as differential signal output terminals of the single-ended to differential circuit (60).
5. The electrochemical sensor array output detection system of claim 1, further comprising a power module (100), a display module (80) and a communication module (90), wherein the power module (100) is connected to the single chip microcomputer module (10), the multi-channel analog-to-digital converter circuit (20), the multi-channel sensor signal processing circuit (30) and the reference signal processing circuit (70), and the display module (80) and the communication module (90) are respectively connected to the single chip microcomputer module (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021744874.5U CN213986290U (en) | 2020-08-20 | 2020-08-20 | Electrochemical sensor array output detection system |
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| CN202021744874.5U CN213986290U (en) | 2020-08-20 | 2020-08-20 | Electrochemical sensor array output detection system |
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| CN213986290U true CN213986290U (en) | 2021-08-17 |
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