CN110186984A - The electrochemical sensor integrating device of wide concentration multicomponent hazardous gas detector - Google Patents

Abstract

The invention discloses the electrochemical sensor integrating devices of wide concentration multicomponent hazardous gas detector, when solution prior art needs detect wide concentration multicomponent hazardous gas, need the problem of repeatedly replacing electrochemical sensor and related circuit plate, leading to cumbersome reduction detection efficiency.The present invention includes electrochemical sensor, circuit board, electrochemical sensor automatic identification and ineffectiveness detection circuit, gas circuit means of communication and gasmetry seal box；Gas circuit means of communication sets air inlet pipe, escape pipe and unit gas chamber；Gasmetry box includes box body and lid, and box body is equipped with air inlet pipe hole, outlet pore and plug wire hole.The present invention integrates eight electrochemical sensors, eight electrochemical sensors can carry out simultaneously gas detection and crosstalk will not occur each other, it can also easily be plugged on wide concentration multicomponent hazardous gas detector simultaneously, the detection efficiency of wide concentration multicomponent hazardous gas can be effectively improved, wins the quality time for rescue and relief work.

Description

Electrochemical sensor integration device for wide-concentration multi-component hazardous gas detector

technical field

The invention relates to an electrochemical sensor integrated device of a wide-concentration multi-component dangerous gas detector.

Background technique

At present, the most commonly used dangerous gas detection equipment for fire brigade mainly includes four-in-one gas detection analyzer and combustible gas detection analyzer. The 4-in-1 gas detector is suitable for on-site detection in various places such as chemical industry, petrochemical industry, coal and municipal gas, etc. It can meet the measurement needs of special occasions, and perform gas concentration detection or leakage detection on tunnels, pipelines, tanks, and sealed windows. The combustible gas detection analyzer is a general-purpose detection instrument used to detect and measure a variety of dangerous gases. It is suitable for detecting toxic and corrosive gases in temporary occasions, and has the characteristics of easy operation.

The gas analyzer mainly detects the gas through various built-in gas sensors, obtains the data of each component in the gas to be detected, and then performs corresponding analysis. However, the gas detection methods used in the existing gas analysis, on the one hand, the gas sensors are prone to crosstalk, which leads to large errors in the detection and analysis of gas components, and finally the detection results are false positive, false negative, Concentration misjudgment and other phenomena, and such mistakes are fatal to the judgment of on-site rescuers; on the other hand, the detection is not flexible enough. When it is necessary to detect various components in different gases, the only way to replace the relevant gas sensor and its Circuit board to achieve, the operation is not convenient enough.

Therefore, an electrochemical sensor integration device for a wide-concentration multi-component hazardous gas detector is designed to integrate eight electrochemical sensors together, and the eight electrochemical sensors can simultaneously detect gases without crosstalk with each other. At the same time, it can also be easily plugged into a wide-concentration multi-component dangerous gas detector, which has become a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

The technical problem to be solved by the present invention is: to provide an electrochemical sensor integrated device for a wide-concentration multi-component dangerous gas detector, and to solve the need to replace the electrochemical sensor multiple times when the prior art needs to detect a wide-concentration multi-component dangerous gas And the corresponding circuit board, resulting in cumbersome operation and lower detection efficiency.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

An electrochemical sensor integration device for a wide-concentration multi-component dangerous gas detector, including a circuit board integrated with eight electrochemical sensors, a gas path communication mechanism, and a gas measurement sealed box; eight electrochemical sensors are integrated on the circuit board. Sensor automatic identification and failure detection circuit, the eight electrochemical sensor automatic identification and failure detection circuits correspond to the eight electrochemical sensors one by one, each of the electrochemical sensors is connected to the corresponding electrochemical sensor Sensor automatic identification and failure detection circuit;

The gas path communication mechanism is provided with an air intake pipe, two air outlet pipes, and eight unit air chambers. It communicates with four of the unit air chambers, and the eight of the unit air chambers correspond to the eight electrochemical sensors respectively. The sealing cover of the circuit board is connected to the gas circuit communication mechanism, and each of the The electrochemical sensors are respectively located in the corresponding unit gas chambers;

The gas measurement box includes a box body and a cover connected to the box body, the gas path communication mechanism with the circuit board connected to the sealing cover is placed in the box body, and the box body is provided with The air inlet pipe hole corresponding to the air inlet pipe and the air outlet pipe hole corresponding to the air outlet pipe, the box body is provided with wire insertion holes, and the circuit board is provided with the eight electrochemical devices respectively. The sensor automatically identifies the plug-in end connected to the failure detection circuit, and the plug-in end is connected to the control element of the wide-concentration multi-component dangerous gas detector through the plug-in hole, and the air inlet pipe passes through the outlet The trachea hole communicates with the gas sampling pipe of the wide-concentration multi-component dangerous gas detector.

Further, the circuit board is fixedly connected to the gas path communication mechanism by bolts.

Further, a silicone sealing ring is provided between the air passage communication mechanism and the circuit board, and the circuit board and the air passage communication mechanism are sealed by the silicone sealing ring.

Further, one side of the box body is provided with a plug-in protrusion, and the air inlet pipe hole and the wire insertion hole are both provided with the plug-in protrusion, and the plug-in protrusion is compatible with a wide concentration When the sockets of the component hazardous gas detector are connected, and the socket protrusion is plugged into the socket, the socket end is connected to the control element, and the air inlet pipe is connected to the gas sampling pipe.

Further, the bottom surface of the box body is provided with a socket dovetail groove, which matches the socket dovetail groove on the wide-concentration multi-component dangerous gas detector, and the gas measurement box passes through the socket Connect the dovetail groove to the wide-concentration multi-component dangerous gas detector.

Further, the gas path communication mechanism is made of resin.

Further, both the box body and the cover body are made of resin.

Compared with the prior art, the present invention has the following beneficial effects:

The invention has the advantages of simple structure, scientific and reasonable design, and convenient use. Eight electrochemical sensors are integrated together, and the eight electrochemical sensors can simultaneously detect gases without crosstalk with each other. At the same time, they can be easily inserted into wide Concentration multi-component dangerous gas detector can effectively improve the detection efficiency of wide-concentration multi-component dangerous gas, and win valuable time for emergency rescue and disaster relief.

The invention includes an electrochemical sensor, a circuit board and a gas path communication mechanism. Eight electrochemical sensors and eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board, and each electrochemical sensor automatic identification and failure detection circuit An electrochemical sensor is connected to the top of the circuit board, and the sealing cover of the circuit board is connected to the gas circuit communication mechanism. Each electrochemical sensor is placed in a unit gas chamber of the gas circuit communication mechanism. The root outlet pipes are respectively connected with the four unit air chambers. In this way, the inlet pipes are connected with the sampling pipes on the wide-concentration multi-component hazardous gas detector, and the sampling pipes on the wide-concentration multi-component hazardous gas detector After the leaked gas is sampled, it enters the intake pipe through the sampling pipe, and then enters the eight unit air chambers respectively, and then is discharged from the outlet pipe. When the dangerous gas enters the unit air chamber, the corresponding electrochemical sensor can detect it, because The eight unit air chambers are distributed in parallel. The eight electrochemical sensors located in the eight unit air chambers will not generate crosstalk with each other during operation, and the detection accuracy is high. Since each electrochemical sensor is connected to a In the automatic identification and failure detection circuits of electrochemical sensors, they can work independently, that is, they can detect eight kinds of dangerous gases at the same time, and the detection efficiency is high, which can win valuable time for emergency rescue and disaster relief.

The circuit board of the present invention is fixed on the gas path communication mechanism by bolts, and is sealed by a silicone sealing ring. The circuit board and the gas path communication mechanism are detachable, which is convenient for maintenance. The dovetail groove can conveniently fix the gas measurement sealing box to the wide-concentration multi-component dangerous gas detector. The control element is connected, and the inlet pipe can be connected with the gas sampling pipe, which is convenient for installation and can effectively improve the detection efficiency.

Description of drawings

Figure 1 is a schematic diagram of the appearance of the present invention.

Fig. 2 is a schematic structural diagram of the gas path communication 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 box body of the present invention.

Fig. 5 is a bottom view of the box body of the present invention.

Fig. 6 is a side view of the box body of the present invention (including the plugging protrusion side).

Fig. 7 is another side view of the box body of the present invention (the side opposite to the insertion protrusion).

Fig. 8 is a view of the cover of the present invention.

Fig. 9 is a driving principle diagram of the automatic identification and failure detection circuit of the electrochemical sensor of the present invention.

Among them, the names corresponding to the reference signs are:

1-electrochemical sensor, 2-circuit board, 3-gas connection mechanism, 4-gas measurement sealed box, 5-inlet pipe, 6-outlet pipe, 7-unit gas chamber, 8-box, 9-cover , 10-outlet pipe hole, 11-wire insertion hole, 12-inlet pipe hole, 13-plug protrusion, 14-plug dovetail groove, 15-plug end.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

As shown in Figures 1-8, the electrochemical sensor integrated device of the wide-concentration multi-component dangerous gas detector provided by the present invention has simple structure, scientific and reasonable design, and is easy to use. Eight electrochemical sensors are integrated together, and eight Electrochemical sensors can detect gases at the same time without crosstalk, and can be easily plugged into a wide-concentration multi-component hazardous gas detector, which can effectively improve the detection efficiency of wide-concentration multi-component hazardous gases. Gain precious time for emergency rescue and disaster relief. The present invention includes a circuit board 2 integrated with eight electrochemical sensors 1, a gas path communication mechanism 3, and a gas measurement sealing box 4; the circuit board 2 is integrated with eight electrochemical sensors automatic identification and failure detection circuits, The eight electrochemical sensor automatic identification and failure detection circuits are in one-to-one correspondence with the eight electrochemical sensors 1, and each electrochemical sensor 1 is respectively connected to the corresponding electrochemical sensor automatic identification and failure detection In the electric circuit, the gas path communication mechanism 3 is made of resin.

The gas path communication mechanism 3 is provided with an air inlet pipe 5, two air outlet pipes 6, and eight unit air chambers 7, and the air inlet pipe 5 communicates with the eight unit air chambers 7 respectively through pipelines, each of which The air outlet pipe 6 communicates with the four unit air chambers 7 through pipelines, and the eight unit air chambers 7 correspond to the eight electrochemical sensors 1 respectively, and the sealing cover of the circuit board 2 is connected to the On the gas path communication mechanism 3, and each of the electrochemical sensors 1 is located in the corresponding unit air chamber 7, and the circuit board 2 and the gas path communication mechanism 3 are fixedly connected by bolts. A silicone sealing ring is provided between the air passage communication mechanism 3 and the circuit board 2, and the circuit board 2 and the air passage communication mechanism 3 are sealed by the silicone sealing ring.

The invention includes an electrochemical sensor, a circuit board and a gas path communication mechanism. Eight electrochemical sensors and eight electrochemical sensor automatic identification and failure detection circuits are integrated on the circuit board, and each electrochemical sensor automatic identification and failure detection circuit An electrochemical sensor is connected to the top of the circuit board, and the sealing cover of the circuit board is connected to the gas circuit communication mechanism. Each electrochemical sensor is placed in a unit gas chamber of the gas circuit communication mechanism. The root outlet pipes are respectively connected with the four unit air chambers. In this way, the inlet pipes are connected with the sampling pipes on the wide-concentration multi-component hazardous gas detector, and the sampling pipes on the wide-concentration multi-component hazardous gas detector After the leaked gas is sampled, it enters the intake pipe through the sampling pipe, and then enters the eight unit air chambers respectively, and then is discharged from the outlet pipe. When the dangerous gas enters the unit air chamber, the corresponding electrochemical sensor can detect it, because The eight unit air chambers are distributed in parallel. The eight electrochemical sensors located in the eight unit air chambers will not generate crosstalk with each other during operation, and the detection accuracy is high. Since each electrochemical sensor is connected to a In the automatic identification and failure detection circuits of electrochemical sensors, they can work independently, that is, they can detect eight kinds of dangerous gases at the same time, and the detection efficiency is high, which can win valuable time for emergency rescue and disaster relief.

The gas measurement box 4 of the present invention includes a box body 8 and a cover body 9 connected to the box body 8, and the gas path communication mechanism 3 with the circuit board 2 connected to the sealing cover is placed 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, and the box body 8 is provided with a wire insertion hole 11. The circuit board 2 is provided with plug-in terminals 15 respectively connected to the eight electrochemical sensor automatic identification and failure detection circuits, and the plug-in terminals 15 are connected to the wide The control element of concentration multi-component dangerous gas detector is connected, and described inlet pipe 5 is communicated with the gas sampling pipe of described wide-concentration multi-component dangerous gas detector through described outlet pipe hole 10, and described box body 8 and The cover bodies 9 are all made of resin. One side of the box body 8 is provided with a plug-in protrusion 13, and the air inlet pipe hole 12 and the wire insertion hole 11 are all provided with the plug-in protrusion 13, and the plug-in protrusion 13 is connected to the When the sockets of the wide-concentration multi-component dangerous gas detector are docked, and when the socket protrusion 13 is plugged into the socket, the socket end 15 is connected to the control element, and the air inlet pipe 5 is connected to the The gas sampling pipe is connected.

The bottom surface of the box body 8 of the present invention is provided with an insertion dovetail groove 14, the insertion dovetail groove 14 is matched with the socket dovetail groove on the wide-concentration multi-component dangerous gas detector, and the gas measurement box 4 passes through The insertion dovetail groove 14 is inserted into a wide-concentration multi-component dangerous gas detector.

The circuit board of the present invention is fixed on the gas path communication mechanism by bolts, and is sealed by a silicone sealing ring. The circuit board and the gas path communication mechanism are detachable, which is convenient for maintenance. The dovetail groove can conveniently fix the gas measurement sealing box to the wide-concentration multi-component dangerous gas detector. The control element is connected, and the inlet pipe can be connected with the gas sampling pipe, which is convenient for installation and can effectively improve the detection efficiency.

As shown in Figure 9, the control element of the wide-concentration and multi-component dangerous gas detector in the present invention can be a single-chip microcomputer connected with an AD conversion circuit and a power supply. The electrochemical sensor access port of pin access terminal, RE pin access terminal and WE pin access terminal, programmable and adjustable resistor U1, MOS tube Q1, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5 , capacitor C1, capacitor C2, capacitor C3, capacitor C5, amplifier OP1, automatic gain adjustment circuit, and automatic bias voltage generation circuit, the CE access terminal, the RE access terminal and the WE access terminal are used respectively For accessing the CE pin, the RE pin and the WE pin of the electrochemical sensor; the three pins of the electrochemical sensor (1) are respectively connected to the CE pin access end and the RE pin access terminal is connected to the WE pin access terminal.

According to the present invention, the CE pin access terminal, the resistor R1, and the output terminal of the amplifier OP1 are sequentially connected in series, and the RE pin access terminal, the resistor R2, the resistor R3, and the The same-direction input terminals of the amplifier OP1 are sequentially connected in series, the WE pin access terminal, the programmable adjustable resistor U1, the automatic gain adjustment circuit, the resistor R4, the resistor R5, and the amplifier The reverse input terminals of OP1 are sequentially connected in series.

In the present invention, the two ends of the capacitor C1 are respectively connected to the CE pin access end and the RE pin access end, and the two ends of the capacitor C3 are respectively connected to the same-direction input end of the amplifier OP1 and the input end of the RE pin. The output end of the amplifier OP1 is connected; one end of the capacitor C5 is connected to the programmable adjustable resistor U1, and the other end is grounded; one end of the capacitor C2 is connected between the resistor R2 and the resistor R3, Its other end is connected between the resistor R1 and the output of the amplifier OP1.

The automatic bias generating circuit of the present invention is connected to the reverse input terminal of the amplifier OP1, the automatic bias generating circuit is also grounded, and the drain D of the MOS transistor Q1 is connected to the WE pin access end , the source S of the MOS transistor Q1 is connected to the RE pin access end, the gate G of the MOS transistor Q1 and the automatic bias voltage generation circuit are respectively connected to a pin of the single-chip microcomputer, so A pin of the single-chip microcomputer is connected between the resistance R4 and the resistance R5, and the automatic gain adjustment circuit is connected with the single-chip microcomputer through the AD conversion circuit.

The automatic gain adjustment circuit of the present invention includes an amplifier OP2, a programmable adjustable resistor U3, a programmable adjustable resistor U4, a programmable adjustable resistor U5, and a capacitor C6, the reverse input terminal of the amplifier OP2, the adjustable The programmable adjustable resistor U3, the programmable adjustable resistor U4, the programmable adjustable resistor U5, and the output terminal of the amplifier OP2 are sequentially connected in series, and the two ends of the capacitor C6 are respectively connected to the output terminals of the amplifier OP2. The reverse input terminal is connected to the output terminal of the amplifier OP2, the reverse input terminal of the amplifier OP2 is connected to the programmable adjustable resistor U1, and the same direction input terminal of the amplifier OP2 is connected to the resistor R4 connected, the output terminal of the amplifier OP2 is connected with the single-chip microcomputer through the AD conversion circuit.

The automatic bias generating circuit of the present invention includes a MOS transistor Q2, a programmable adjustable resistor U2, a programmable adjustable resistor U6, and a capacitor C4, the drain D of the MOS transistor Q2, the capacitor C4, the adjustable The programmable adjustable resistor U6, the programmable adjustable resistor U2, and the source S of the MOS transistor Q2 are sequentially connected in series, and the drain D of the MOS transistor Q2 is connected to the inverting input terminal of the amplifier OP1, The gate G of the MOS transistor Q2 is connected to a pin of the microcontroller, and the capacitor C4 and the programmable adjustable resistor U6 are grounded.

The programmable adjustable resistor U1 of the present invention is an X9C102 programmable resistor, the adjustable range of resistance value of which is 0-1KΩ, the programmable adjustable resistor U2, the programmable adjustable resistor U3, the programmable adjustable resistor The adjustable resistor U4, the programmable adjustable resistor U5, and the programmable adjustable resistor U6 are all X9C104 programmable resistors, and the adjustable range of their resistance value is 0-100KΩ. The resistance value of the resistor R1 is 1KΩ, the resistance value of the resistor R2 is 10KΩ, the resistance value of the resistor R3 is 10KΩ, the resistance value of the resistor R4 is 47.5KΩ, and the resistance value of the resistor R5 is 27.4 KΩ. 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 implementation modes of the present invention, and should not be used to limit the scope of protection of the present invention, but any modification or embellishment without substantive significance made on the main design concept and spirit of the present invention shall be solved by it. If the technical problems are still consistent with the present invention, all should be included in the protection scope of the present invention.

Claims (7)

1. the electrochemical sensor integrating device of wide concentration multicomponent hazardous gas detector, it is characterised in that: including being integrated with The circuit board (2) of eight electrochemical sensors (1), gas circuit means of communication (3) and gasmetry seal box (4)；The circuit Eight electrochemical sensor automatic identifications and ineffectiveness detection circuit are integrated on plate (2), eight electrochemical sensors are certainly Dynamic identification and ineffectiveness detection circuit are corresponded with eight electrochemical sensors (1), each electrochemical sensor (1) it is respectively connected in corresponding electrochemical sensor automatic identification and ineffectiveness detection circuit；

The gas circuit means of communication (3) is equipped with air inlet pipe (5), two escape pipes (6) and eight unit gas chambers (7), it is described into Tracheae (5) is connected with eight unit gas chambers (7) respectively by pipeline, and each escape pipe (6) passes through pipeline respectively Be connected with four unit gas chambers (7), eight unit gas chambers (7) respectively with eight electrochemical sensors (1) Corresponding, circuit board (2) sealing cover connects on the gas circuit means of communication (3), and each electrochemical sensor (1) it is located in corresponding unit gas chamber (7)；

The gasmetry box (4) includes box body (8) and lid is connected to the lid (9) on the box body (8), and sealing cover is connected to described The gas circuit means of communication (3) of circuit board (2) is placed in the box body (8), and the box body (8) is equipped with and the air inlet pipe (5) corresponding air inlet pipe hole (12) and outlet pore (10) corresponding with the escape pipe (6) set on the box body (8) Have plug wire hole (11), the circuit board (2) be equipped with respectively with eight electrochemical sensor automatic identifications and ineffectiveness inspection The inserted terminal (15) that slowdown monitoring circuit is connected, and the inserted terminal (15) is endangered by the plug wire hole (11) and wide concentration multicomponent The control element of dangerous gas detecting instrument connects, and the air inlet pipe (5) passes through the outlet pore (10) and the wide concentration multiple groups The gas sampler of point hazardous gas detector is connected.

2. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 1, It is characterized in that: being bolted to connection between the circuit board (2) and the gas circuit means of communication (3).

3. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 2, It is characterized in that: being equipped with silica gel sealing ring, and the circuit board between the gas circuit means of communication (3) and the circuit board (2) (2) it is mutually sealed with the gas circuit means of communication (3) by the silica gel sealing ring.

4. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 3, Be characterized in that: the side of the box body (8) is equipped with grafting protrusion (13), and the air inlet pipe hole (12) and the plug wire hole (11) it offers on the grafting raised (13), the grafting raised (13) and wide concentration multicomponent hazardous gas detector Interface is connected to each other, and when grafting raised (13) is plugged in interface, the inserted terminal (15) connect with the control element, The air inlet pipe (5) is connected with the gas sampler.

5. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 4, Be characterized in that: the bottom surface of the box body (8) is equipped with grafting dovetail groove (14), the grafting dovetail groove (14) and wide concentration multicomponent Socket joint dovetail groove on hazardous gas detector matches, and the gasmetry box (4) is inserted by the grafting dovetail groove (14) It is connected on wide concentration multicomponent hazardous gas detector.

6. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 5, Be characterized in that: the gas circuit means of communication (3), which is adopted, to be made of resin.

7. the electrochemical sensor integrating device of width concentration multicomponent hazardous gas detector according to claim 6, Be characterized in that: the box body (8) and lid (9) are all made of resin and are made.