CN110186984B - Electrochemical sensor integrated device of wide-concentration multi-component hazardous gas detector - Google Patents
Electrochemical sensor integrated device of wide-concentration multi-component hazardous gas detector Download PDFInfo
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Abstract
The invention discloses an electrochemical sensor integrated device of a wide-concentration multi-component hazardous gas detector, which solves the problem that the detection efficiency is reduced due to complicated operation caused by the fact that an electrochemical sensor and a corresponding circuit board need to be replaced for many times when the wide-concentration multi-component hazardous gas needs to be detected in the prior art. The invention comprises an electrochemical sensor, a circuit board, an electrochemical sensor automatic identification and failure detection circuit, a gas circuit communication mechanism and a gas measurement sealing box; the gas path communicating mechanism is provided with a gas inlet pipe, a gas outlet pipe and a unit gas chamber; the gas measurement box comprises a box body and a cover body, wherein the box body is provided with a gas inlet pipe hole, a gas outlet pipe hole and a wire inserting hole. The invention integrates eight electrochemical sensors together, the eight electrochemical sensors can simultaneously carry out gas detection without crosstalk, and can be conveniently plugged into a wide-concentration multi-component hazardous gas detector, thereby effectively improving the detection efficiency of the wide-concentration multi-component hazardous gas and gaining precious time for emergency rescue and disaster relief.
Description
Technical Field
The invention relates to an electrochemical sensor integrated device of a wide-concentration multi-component hazardous gas detector.
Background
At present, the most common hazardous gas detection equipment for fire-fighting troops mainly comprises a four-in-one gas detection analyzer and a combustible gas detection analyzer. The four-in-one gas detector is suitable for field detection in various places such as chemical industry, petrifaction, coal, municipal gas and the like, can meet the measurement requirement of special occasions, and can be used for detecting the gas concentration or leakage of tunnels, pipelines, tanks, sealed windows and the like. The combustible gas detection analyzer is a universal detection instrument for detecting and measuring various dangerous gases, is suitable for detecting toxic gases and corrosive gases in temporary occasions, and has the characteristic of simple and convenient operation.
The gas analyzer mainly detects gas through various built-in gas sensors to obtain data of various components in the gas to be detected, and then performs corresponding analysis. However, in the gas detection method adopted in the existing gas analysis, on one hand, crosstalk is easily generated among gas sensors, so that a large error occurs in the detection and analysis of gas components, and finally, the detection results show false positive, false negative, concentration misjudgment and the like, and the error is fatal to judgment of field rescuers; on the other hand, the detection is not flexible enough, when various components in different gases need to be detected, the detection can be realized only by replacing related gas sensors and circuit boards thereof, and the operation is not convenient enough.
Therefore, an electrochemical sensor integrated device of a wide-concentration multi-component hazardous gas detector is designed to integrate eight electrochemical sensors together, the eight electrochemical sensors can simultaneously detect gas and cannot generate crosstalk, and meanwhile, the electrochemical sensor integrated device can be conveniently plugged into the wide-concentration multi-component hazardous gas detector, so that the technical problem to be solved by technical personnel in the technical field is urgently solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the electrochemical sensor integrated device of the wide-concentration multi-component hazardous gas detector is provided, and the problems that in the prior art, when wide-concentration multi-component hazardous gas needs to be detected, the electrochemical sensor and a corresponding circuit board need to be replaced for many times, operation is complex, and detection efficiency is reduced are solved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the electrochemical sensor integrated device of the wide-concentration multi-component hazardous gas detector comprises a circuit board integrated with eight electrochemical sensors, a gas path communicating mechanism and a gas measurement sealing box; eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board, the eight electrochemical sensor automatic identification and failure detection circuits correspond to the eight electrochemical sensors one by one, and each electrochemical sensor is respectively connected into the corresponding electrochemical sensor automatic identification and failure detection circuit;
the gas path communicating mechanism is provided with a gas inlet pipe, two gas outlet pipes and eight unit gas chambers, the gas inlet pipe is respectively communicated with the eight unit gas chambers through pipelines, each gas outlet pipe is respectively communicated with the four unit gas chambers through pipelines, the eight unit gas chambers respectively correspond to the eight electrochemical sensors, the circuit board sealing cover is connected to the gas path communicating mechanism, and each electrochemical sensor is respectively positioned in the corresponding unit gas chamber;
the gas measurement seal box includes the box body and covers connect in lid on the box body, sealed lid connect the circuit board the gas circuit feed mechanism arranges in the box body, be equipped with on the box body with the corresponding inlet tube hole of inlet tube and with the corresponding gas outlet pipe hole of outlet duct, be equipped with the plug wire hole on the box body, be equipped with on the circuit board respectively with eight the grafting end that electrochemical sensor automatic identification and inefficacy detection circuitry are connected, and the grafting end passes through the plug wire hole is connected with the control element of wide concentration multicomponent hazardous gas detector, the inlet tube passes through the gas outlet pipe hole with the gas sampling pipe of wide concentration multicomponent hazardous gas detector is linked together.
Further, the circuit board is fixedly connected with the air path communication mechanism through bolts.
Further, the gas circuit feed through mechanism with be equipped with the silica gel sealing washer between the circuit board, and the circuit board with the gas circuit feed through mechanism passes through the silica gel sealing washer is sealed mutually.
Furthermore, one side of the box body is provided with an inserting protrusion, the air inlet pipe hole and the inserting hole are both provided with the inserting protrusion, the inserting protrusion is butted with the inserting port of the wide-concentration multi-component hazardous gas detector, when the inserting protrusion is inserted into the inserting port, the inserting end is connected with the control element, and the air inlet pipe is communicated with the gas sampling pipe.
Furthermore, the bottom surface of the box body is provided with a plug-in dovetail groove, the plug-in dovetail groove is matched with a socket-and-spigot dovetail groove on the wide-concentration multi-component hazardous gas detector, and the gas measurement sealing box is plugged into the wide-concentration multi-component hazardous gas detector through the plug-in dovetail groove.
Further, the air path communication mechanism is made of resin.
Further, the box body and the cover body are both made of resin.
Compared with the prior art, the invention has the following beneficial effects:
the invention has simple structure, scientific and reasonable design and convenient use, integrates eight electrochemical sensors together, can simultaneously carry out gas detection on the eight electrochemical sensors without crosstalk, can be conveniently plugged into a wide-concentration multi-component hazardous gas detector, can effectively improve the detection efficiency of the wide-concentration multi-component hazardous gas, and wins precious time for emergency rescue and relief work.
The invention comprises electrochemical sensors, a circuit board and a gas path communicating mechanism, wherein eight electrochemical sensors and eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board, each electrochemical sensor automatic identification and failure detection circuit is connected with one electrochemical sensor, a circuit board sealing cover is connected on the gas path communicating mechanism, each electrochemical sensor is arranged in one unit gas chamber of the gas path communicating mechanism, a gas inlet pipe is respectively communicated with each unit gas chamber, each gas outlet pipe is respectively communicated with four unit gas chambers, thus, the gas inlet pipe is communicated with a sampling pipe on a wide-concentration multi-component hazardous gas detector, the sampling pipe on the wide-concentration multi-component hazardous gas detector samples gas leaked out, then the gas enters the gas inlet pipe through the sampling pipe, then enters the eight unit gas chambers respectively, and then is discharged from the gas outlet pipe, when dangerous gas enters the unit gas chambers, the corresponding electrochemical sensors can detect the dangerous gas, the eight unit gas chambers are distributed in a parallel connection mode, the eight electrochemical sensors in the eight unit gas chambers cannot generate crosstalk between each other during operation, the detection precision is high, each electrochemical sensor is independently connected into an electrochemical sensor automatic identification and failure detection circuit, the electrochemical sensors can independently operate, namely, the eight dangerous gases can be detected simultaneously, the detection efficiency is high, and valuable time can be won for rescue and relief work.
The gas measurement sealing box is provided with the inserting protrusion and the inserting dovetail groove, the inserting dovetail groove can conveniently fix the gas measurement sealing box on the wide-concentration multi-component hazardous gas detector, the inserting protrusion is butted with an inserting port on the wide-concentration multi-component hazardous gas detector, the inserting end can be connected with a control element, the gas inlet pipe can be communicated with the gas sampling pipe, the installation is convenient, and the detection efficiency can be effectively improved.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic structural view of the air path communicating mechanism of the present invention.
Fig. 3 is a schematic diagram of a circuit board integrated with an electrochemical sensor according to the present invention.
FIG. 4 is a top view of the cassette of the present invention.
FIG. 5 is a bottom view of the cassette of the present invention.
FIG. 6 is a side view of the case of the present invention (including the insertion projection side).
Fig. 7 is another side view of the case of the present invention (opposite side of the insertion projection).
Fig. 8 is a view of the cover of the present invention.
Fig. 9 is a driving schematic diagram of an electrochemical sensor automatic identification and failure detection circuit according to the present invention.
Wherein, the names corresponding to the reference numbers are:
the device comprises an electrochemical sensor 1, a circuit board 2, a gas path communicating mechanism 3, a gas measuring seal box 4, a gas inlet pipe 5, a gas outlet pipe 6, a unit gas chamber 7, a box body 8, a cover body 9, a gas outlet pipe hole 10, a plug wire hole 11, a plug wire hole 12, a gas inlet pipe hole 13, a plug protrusion 14, a plug dovetail groove 15 and a plug end 15.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in fig. 1 to 8, the electrochemical sensor integrated device of the wide-concentration multi-component hazardous gas detector provided by the invention has the advantages of simple structure, scientific and reasonable design and convenient use, eight electrochemical sensors are integrated together, the eight electrochemical sensors can simultaneously carry out gas detection without crosstalk, and can be conveniently plugged into the wide-concentration multi-component hazardous gas detector, so that the detection efficiency of the wide-concentration multi-component hazardous gas can be effectively improved, and precious time is won for emergency rescue and disaster relief. The invention comprises a circuit board 2 integrated with eight electrochemical sensors 1, a gas path communicating mechanism 3 and a gas measurement sealing box 4; eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board 2, the eight electrochemical sensor automatic identification and failure detection circuits correspond to the eight electrochemical sensors 1 one by one, each electrochemical sensor 1 is respectively connected into the corresponding electrochemical sensor automatic identification and failure detection circuits, and the gas circuit communication mechanism 3 is made of resin.
The gas circuit communicating mechanism 3 is provided with a gas inlet pipe 5, two gas outlet pipes 6 and eight unit gas chambers 7, the gas inlet pipe 5 is respectively communicated with the eight unit gas chambers 7 through pipelines, each gas outlet pipe 6 is respectively communicated with the four unit gas chambers 7 through pipelines, the eight unit gas chambers 7 are respectively corresponding to the eight electrochemical sensors 1, the circuit board 2 is hermetically connected on the gas circuit communicating mechanism 3, each electrochemical sensor 1 is respectively positioned in the corresponding unit gas chamber 7, and the circuit board 2 is fixedly connected with the gas circuit communicating mechanism 3 through bolts. Gas circuit feed mechanism 3 with be equipped with the silica gel sealing washer between the circuit board 2, and circuit board 2 with gas circuit feed mechanism 3 passes through the silica gel sealing washer is sealed mutually.
The invention comprises electrochemical sensors, a circuit board and a gas path communicating mechanism, wherein eight electrochemical sensors and eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board, each electrochemical sensor automatic identification and failure detection circuit is connected with one electrochemical sensor, a circuit board sealing cover is connected on the gas path communicating mechanism, each electrochemical sensor is arranged in one unit gas chamber of the gas path communicating mechanism, a gas inlet pipe is respectively communicated with each unit gas chamber, each gas outlet pipe is respectively communicated with four unit gas chambers, thus, the gas inlet pipe is communicated with a sampling pipe on a wide-concentration multi-component hazardous gas detector, the sampling pipe on the wide-concentration multi-component hazardous gas detector samples gas leaked out, then the gas enters the gas inlet pipe through the sampling pipe, then enters the eight unit gas chambers respectively, and then is discharged from the gas outlet pipe, when dangerous gas enters the unit gas chambers, the corresponding electrochemical sensors can detect the dangerous gas, the eight unit gas chambers are distributed in a parallel connection mode, the eight electrochemical sensors in the eight unit gas chambers cannot generate crosstalk between each other during operation, the detection precision is high, each electrochemical sensor is independently connected into an electrochemical sensor automatic identification and failure detection circuit, the electrochemical sensors can independently operate, namely, the eight dangerous gases can be detected simultaneously, the detection efficiency is high, and valuable time can be won for rescue and relief work.
The gas measurement sealing box 4 comprises a box body 8 and a cover body 9 which is covered on the box body 8, the gas path communicating mechanism 3 which is covered with the circuit board 2 is arranged in the box body 8, the box body 8 is provided with an air inlet pipe hole 12 corresponding to the air inlet pipe 5 and an air outlet pipe hole 10 corresponding to the air outlet pipe 6, the box body 8 is provided with a plug wire hole 11, the circuit board 2 is provided with plug terminals 15 which are respectively connected with eight electrochemical sensor automatic identification and failure detection circuits, and the plug-in end 15 is connected with a control element of the wide-concentration multi-component hazardous gas detector through the plug-in hole 11, the air inlet pipe 5 is communicated with a gas sampling pipe of the wide-concentration multi-component hazardous gas detector through the air outlet pipe hole 10, and the box body 8 and the cover body 9 are both made of resin. One side of the box body 8 is provided with an inserting protrusion 13, the air inlet pipe hole 12 and the wire inserting hole 11 are both provided on the inserting protrusion 13, the inserting protrusion 13 is butted with an inserting port of the wide-concentration multi-component hazardous gas detector, when the inserting protrusion 13 is inserted into the inserting port, the inserting end 15 is connected with the control element, and the air inlet pipe 5 is communicated with the gas sampling pipe.
According to the invention, the bottom surface of the box body 8 is provided with the plug-in dovetail groove 14, the plug-in dovetail groove 14 is matched with a plug-in dovetail groove on the wide-concentration multi-component hazardous gas detector, and the gas measurement sealing box 4 is plugged into the wide-concentration multi-component hazardous gas detector through the plug-in dovetail groove 14.
The gas measurement sealing box is provided with the inserting protrusion and the inserting dovetail groove, the inserting dovetail groove can conveniently fix the gas measurement sealing box on the wide-concentration multi-component hazardous gas detector, the inserting protrusion is butted with an inserting port on the wide-concentration multi-component hazardous gas detector, the inserting end can be connected with a control element, the gas inlet pipe can be communicated with the gas sampling pipe, the installation is convenient, and the detection efficiency can be effectively improved.
As shown in fig. 9, the control element of the wide-concentration multi-component hazardous gas detector of the present invention may be a single chip connected with an AD conversion circuit and a power supply, the automatic identification and failure detection circuit of the electrochemical sensor of the present invention includes an electrochemical sensor access port having a CE pin access end, a RE pin access end, and a WE pin access end, a programmable adjustable resistor U1, a MOS transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C5, an amplifier OP1, an automatic gain adjustment circuit, and an automatic bias generation circuit, where the CE access end, the RE access end, and the WE access end are respectively used for accessing a CE pin, an RE pin, and a WE pin of the electrochemical sensor; and three pins of the electrochemical sensor 1 are respectively connected with the CE pin access end, the RE pin access end and the WE pin access end.
The CE pin access end, the resistor R1, and the output end of the amplifier OP1 are sequentially connected in series, the RE pin access end, the resistor R2, the resistor R3, and the same-direction input end of the amplifier OP1 are sequentially connected in series, and the WE pin access end, the programmable adjustable resistor U1, the automatic gain adjusting circuit, the resistor R4, the resistor R5, and the reverse input end of the amplifier OP1 are sequentially connected in series.
In the invention, two ends of the capacitor C1 are respectively connected with the CE pin access end and the RE pin access end, and two ends of the capacitor C3 are respectively connected with the homodromous input end of the amplifier OP1 and the output end of the amplifier OP 1; one end of the capacitor C5 is connected with the programmable adjustable resistor U1, and the other end of the capacitor C5 is grounded; one end of the capacitor C2 is connected between the resistor R2 and the resistor R3, and the other end thereof is connected between the resistor R1 and the output terminal of the amplifier OP 1.
The automatic bias voltage generating circuit is connected with the reverse input end of the amplifier OP1, the automatic bias voltage generating circuit is grounded, the drain D of the MOS tube Q1 is connected with the WE pin access end, the source S of the MOS tube Q1 is connected with the RE pin access end, the grid G of the MOS tube Q1 and the automatic bias voltage generating circuit are respectively connected with one pin of the singlechip, one pin of the singlechip is connected between the resistor R4 and the resistor R5, and the automatic gain adjusting circuit is connected with the singlechip through the AD conversion circuit.
The automatic gain adjusting circuit comprises an amplifier OP2, a programmable adjustable resistor U3, a programmable adjustable resistor U4, a programmable adjustable resistor U5 and a capacitor C6, wherein the reverse input end of the amplifier OP2, the programmable adjustable resistor U3, the programmable adjustable resistor U4, the programmable adjustable resistor U5 and the output end of the amplifier OP2 are sequentially connected in series, two ends of the capacitor C6 are respectively connected with the reverse input end of the amplifier OP2 and the output end of the amplifier OP2, the reverse input end of the amplifier OP2 is connected with the programmable adjustable resistor U1, the homodromous input end of the amplifier OP2 is connected with the resistor R4, and the output end of the amplifier OP2 is connected with a single chip microcomputer through the AD conversion circuit.
The automatic bias generation circuit comprises an MOS tube Q2, a programmable adjustable resistor U2, a programmable adjustable resistor U6 and a capacitor C4, wherein a drain D of the MOS tube Q2, the capacitor C4, the programmable adjustable resistor U6, the programmable adjustable resistor U2 and a source S of the MOS tube Q2 are sequentially connected in series, a drain D of the MOS tube Q2 is connected with a reverse input end of the amplifier OP1, a grid G of the MOS tube Q2 is connected with one pin of a single chip microcomputer, and the capacitor C4 and the programmable adjustable resistor U6 are grounded.
The programmable adjustable resistor U1 is an X9C102 programmable resistor, the adjustable range of the resistance value is 0-1K omega, the programmable adjustable resistor U2, the programmable adjustable resistor U3, the programmable adjustable resistor U4, the programmable adjustable resistor U5 and the programmable adjustable resistor U6 are all X9C104 programmable resistors, and the adjustable range of the resistance value is 0-100K omega. The resistance value of the resistor R1 is 1K omega, the resistance value of the resistor R2 is 10K omega, the resistance value of the resistor R3 is 10K omega, the resistance value of the resistor R4 is 47.5K omega, and the resistance value of the resistor R5 is 27.4K omega. The capacitor C1 is a 10nf capacitor, the capacitor C2 is a 10nf capacitor, the capacitor C3 is a 10nf capacitor, the capacitor C4 is a 10nf capacitor, and the capacitor C5 is a 100nf capacitor.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (5)
1. Electrochemical sensor integrated device of multicomponent hazardous gas detector of wide concentration, its characterized in that: the device comprises a circuit board (2) integrated with eight electrochemical sensors (1), a gas path communication mechanism (3) and a gas measurement sealing box (4); eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board (2), the eight electrochemical sensor automatic identification and failure detection circuits correspond to the eight electrochemical sensors (1) one by one, and each electrochemical sensor (1) is respectively connected into the corresponding electrochemical sensor automatic identification and failure detection circuits;
the gas path communicating mechanism (3) is provided with a gas inlet pipe (5), two gas outlet pipes (6) and eight unit gas chambers (7), the gas inlet pipe (5) is respectively communicated with the eight unit gas chambers (7) through pipelines, each gas outlet pipe (6) is respectively communicated with the four unit gas chambers (7) through pipelines, the eight unit gas chambers (7) respectively correspond to the eight electrochemical sensors (1), the circuit board (2) is connected to the gas path communicating mechanism (3) in a sealing mode, and each electrochemical sensor (1) is respectively located in the corresponding unit gas chamber (7);
the gas measurement sealing box (4) comprises a box body (8) and a cover body (9) which is connected with the box body (8) in a covering mode, the gas path communication mechanism (3) which is connected with the circuit board (2) in a sealing mode is arranged in the box body (8), the box body (8) is provided with an air inlet pipe hole (12) corresponding to the air inlet pipe (5) and an air outlet pipe hole (10) corresponding to the air outlet pipe (6), the box body (8) is provided with a plug wire hole (11), the circuit board (2) is provided with plug terminals (15) which are respectively connected with the eight electrochemical sensor automatic identification and failure detection circuits, and the plug-in end (15) is connected with a control element of the wide-concentration multi-component hazardous gas detector through the plug wire hole (11), the gas inlet pipe (5) is communicated with a gas sampling pipe of the wide-concentration multi-component hazardous gas detector through the gas outlet pipe hole (10);
an inserting protrusion (13) is arranged on one side of the box body (8), the air inlet pipe hole (12) and the wire inserting hole (11) are both formed in the inserting protrusion (13), the inserting protrusion (13) is in butt joint with an inserting port of the wide-concentration multi-component hazardous gas detector, when the inserting protrusion (13) is inserted into the inserting port, the inserting end (15) is connected with the control element, and the air inlet pipe (5) is communicated with the gas sampling pipe;
the bottom surface of box body (8) is equipped with grafting dovetail (14), socket joint dovetail (14) and the socket joint dovetail match on the multicomponent hazardous gas detector of wide concentration, gas measurement seal box (4) are passed through grafting dovetail (14) plug-in connection is on the multicomponent hazardous gas detector of wide concentration.
2. The integrated electrochemical sensor device of a wide-concentration multi-component hazardous gas detector according to claim 1, wherein: the circuit board (2) and the air path communication mechanism (3) are fixedly connected through bolts.
3. The integrated electrochemical sensor device of a wide-concentration multi-component hazardous gas detector according to claim 2, wherein: gas circuit communicating mechanism (3) with be equipped with the silica gel sealing washer between circuit board (2), and circuit board (2) with gas circuit communicating mechanism (3) pass through the silica gel sealing washer is sealed mutually.
4. The integrated electrochemical sensor device of a wide-concentration multi-component hazardous gas detector according to claim 3, wherein: the air path communicating mechanism (3) is made of resin.
5. The integrated electrochemical sensor device of a wide-concentration multi-component hazardous gas detector according to claim 4, wherein: the box body (8) and the cover body (9) are both made of resin.
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| CN110186985B (en) | 2019-06-20 | 2021-08-03 | 应急管理部四川消防研究所 | Wide-concentration multi-component hazardous gas detector and implementation method thereof |
| CN111624306A (en) * | 2020-05-26 | 2020-09-04 | 浙江工业大学 | Miniature atmospheric multi-component detector |
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