CN219608871U - Sensor connecting circuit and gas monitoring system - Google Patents
Sensor connecting circuit and gas monitoring system Download PDFInfo
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- CN219608871U CN219608871U CN202223600465.XU CN202223600465U CN219608871U CN 219608871 U CN219608871 U CN 219608871U CN 202223600465 U CN202223600465 U CN 202223600465U CN 219608871 U CN219608871 U CN 219608871U
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Abstract
The utility model discloses a sensor connection circuit and a gas monitoring system, which comprises a control end, a detection end and a sensor end, wherein the control end, the detection end and the sensor end are separately arranged, the detection end and the sensor end are arranged in an environment to be monitored, the control end is arranged outside the environment to be monitored, the condition that parameters are inaccurate due to the fact that gas in the environment to be monitored enters the control end is prevented, meanwhile, the acquisition signals acquired by the detection end are amplified by the first amplification module and the second amplification module and then are sent to the control end for identification, and therefore accuracy of signal acquisition reading is improved, the problem that the whole monitoring system or equipment needs to be arranged in the environment to be monitored filled with the gas to be monitored in the prior art, the condition that the readings are inaccurate due to the fact that the gas enters the internal structure of the system when the gas is monitored is solved, and accuracy of signal acquisition reading is improved.
Description
Technical Field
The present disclosure relates to connection circuits, and particularly to a sensor connection circuit and a gas monitoring system.
Background
The gas monitoring system is a detection instrument commonly used for industrial gas detection, but at present, the gas monitoring system can only monitor a plurality of gases which are set in the use process, a user needs to measure other gases and then needs to replace software and hardware, or occupies a sensor of other interfaces externally hung with a special interface, and after corresponding software and hardware or sensors are replaced, the whole monitoring system or equipment needs to be placed in the environment to be detected which is full of the gas to be detected in use, so that the condition that the reading is inaccurate is caused due to the fact that the gas enters the internal structure of the system to cause faults when the gas is monitored.
Disclosure of Invention
In view of the above, it is necessary to provide a sensor connection circuit and a gas monitoring system capable of acquiring accurate gas test data without installing a system body in a gas test environment.
The utility model discloses a sensor connecting circuit, which comprises a control end, a detection end and a sensor end, wherein the control end is connected with the detection end;
the control end is connected with one end of the detection end, and the other end of the detection end is connected with the sensor end, so that the function of placing the detection end and the sensor end in an environment to be detected and placing the control end outside the environment to be detected is realized;
in addition, the detection end comprises a first amplification module and a second amplification module, a connecting end working electrode and a connecting end auxiliary electrode are arranged on the sensor end, the first amplification module is connected in series between the control end and the connecting end working electrode, and the second amplification module is connected in series between the control end and the connecting end auxiliary electrode.
Further, an AD conversion module is further arranged in the detection end, the output end of the AD conversion module is connected with the control end, the first input end of the AD conversion module is connected with the first amplification module, and the second input end of the AD conversion module is connected with the second amplification module, so that the functions of collecting collected signals amplified by the first amplification module and the second amplification module and inputting the collected signals to the control end are achieved.
Further, a first amplifying unit and a second amplifying unit are arranged in the first amplifying module, and a first operational amplifier, a field effect transistor and a connecting plug are arranged in the first amplifying unit;
the first end of the connecting plug is connected with the source electrode of the field effect tube and the positive input end of the first operational amplifier, the second end of the connecting plug is connected with the drain electrode of the field effect tube, the third end of the connecting plug is connected with the output end of the first operational amplifier, the negative input end of the first operational amplifier is connected with the second amplifying unit and grounded, the fourth end of the connecting plug is connected with the second amplifying module, the grid electrode of the field effect tube is connected with external power supply, and the working electrode of the connecting end and the auxiliary electrode of the connecting end are connected with the connecting plug.
Further, the first amplifying unit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first capacitor;
the first end of the connecting plug is connected with the source electrode of the field effect tube and one end of the second resistor, the second end of the connecting plug is connected with the drain electrode of the field effect tube, the third end of the connecting plug is connected with one end of the first resistor, the fourth end of the connecting plug is connected with the second amplifying module, the other end of the first resistor is connected with one end of the first capacitor and the output end of the first operational amplifier, the positive input end of the first operational amplifier is connected with one end of the third resistor, the other end of the third resistor is connected with the other end of the first capacitor and the other end of the second resistor, the negative input end of the first operational amplifier is connected with one end of the fourth resistor and one end of the sixth resistor, the other end of the fourth resistor is grounded, the other end of the sixth resistor is connected with the second amplifying unit, the grid electrode of the field effect tube is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the other end of the first capacitor and the second amplifying unit, and the drain electrode of the second amplifier is connected with the external power supply unit.
Further, a second operational amplifier is arranged in the second amplifying unit;
the positive electrode input end of the second operational amplifier is connected with the drain electrode of the field effect transistor, the negative electrode input end of the second operational amplifier is connected with the negative electrode input end of the first operational amplifier and grounded, the positive power supply end of the second operational amplifier is connected with external power supply, the negative power supply end of the second operational amplifier is grounded, and the output end of the second operational amplifier is connected with the AD conversion module.
Further, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor are further arranged in the second amplifying unit;
the positive electrode input end of the second operational amplifier is connected with one end of the ninth resistor, one end of the seventh resistor and one end of the second capacitor, the other end of the ninth resistor is connected with the drain electrode of the field effect tube, the other end of the seventh resistor and the other end of the second capacitor are connected with the output end of the second operational amplifier and one end of the tenth resistor, the other end of the tenth resistor is connected with one end of the fifth capacitor and the AD conversion module, the other end of the fifth capacitor is grounded, the positive power end of the second operational amplifier is connected with one end of the eighth resistor, one end of the third capacitor and one end of the fourth capacitor are connected, the other end of the third capacitor and the other end of the fourth capacitor are mutually connected and are connected with the negative power source end of the second operational amplifier and are grounded, and the other end of the eighth resistor is connected with external power supply.
Further, a third operational amplifier is arranged in the second amplifying module;
the positive input end of the third operational amplifier is connected with the fourth end of the connecting plug, the negative input end of the third operational amplifier is connected with the negative input end of the second operational amplifier and the negative input end of the first operational amplifier, the positive power end of the third operational amplifier is connected with external power supply, the negative power end of the third operational amplifier is grounded, and the output end of the third operational amplifier is connected with the AD conversion module and the fourth end of the connecting plug.
Further, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a ninth capacitor are further arranged in the second amplifying module;
one end of the twelfth resistor is connected with one end of the sixth capacitor and the positive input end of the third operational amplifier, the other end of the twelfth resistor and the other end of the sixth capacitor are connected with the output end of the third operational amplifier, the positive input end of the third operational amplifier is also connected with one end of the thirteenth resistor, the other end of the thirteenth resistor is connected with the fourth end of the connecting plug, one end of the fifteenth resistor is connected with the negative input end of the third operational amplifier, the other end of the fifteenth resistor is grounded, the positive power end of the third operational amplifier is also connected with one end of the fourteenth resistor, one end of the seventh capacitor and one end of the eighth capacitor, the other end of the fourteenth resistor is connected with external power supply, the other end of the seventh capacitor and the other end of the eighth capacitor are mutually grounded, the output end of the third operational amplifier is connected with one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the fourth end of the fourth capacitor and the ninth capacitor is connected with the ninth capacitor, and the ninth capacitor is connected with the ninth capacitor.
Further, the AD conversion module comprises a conversion chip, a seventeenth resistor, an eighteenth resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor;
the ADDR pin and the GND pin of the conversion chip are mutually connected and grounded, the AIN0 pin of the conversion chip is connected with one end of the tenth capacitor and the other end of the tenth resistor, the AIN1 pin of the conversion chip is connected with one end of the eleventh capacitor and the control end, the other end of the tenth capacitor and the other end of the eleventh capacitor are both grounded, the SCL pin of the conversion chip is connected with one end of the seventeenth resistor and the control end, the SDA pin of the conversion chip is connected with one end of the eighteenth resistor and the control end, the other end of the seventeenth resistor and the other end of the eighteenth resistor are mutually connected and are connected with external power supply, the VDD pin of the conversion chip is connected with external power supply and one end of the twelfth capacitor, the AIN3 pin of the conversion chip is connected with one end of the thirteenth capacitor and the control end of the conversion chip, and the other end of the conversion chip is connected with the sixteenth resistor and the sixteenth resistor.
The utility model also comprises a gas monitoring system which comprises the sensor connecting circuit.
According to the utility model, through the structure, the control end, the detection end and the sensor end are separately arranged, the detection end and the sensor end are placed in the environment to be detected, and the control end is arranged outside the environment to be detected, so that the condition that parameters are inaccurate due to the fact that gas in the environment to be detected enters the control end is prevented, meanwhile, the acquired signals acquired by the detection end are amplified through the first amplifying module and the second amplifying module and then are sent to the control end for identification, the accuracy of signal acquisition reading is improved, the problem that the whole monitoring system or equipment in the prior art needs to be placed in the environment to be detected filled with the gas to be detected, faults are easily caused due to the fact that the gas enters the internal structure of the system when the gas is monitored, the condition that reading is inaccurate is caused is solved, and the accuracy of signal acquisition reading is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a schematic diagram of a sensor connection circuit according to an embodiment;
FIG. 2 is a schematic diagram of a first amplifying module according to an embodiment;
FIG. 3 is a schematic circuit diagram of a second amplifying module according to an embodiment;
FIG. 4 is a schematic circuit diagram of an AD conversion module according to an embodiment
The reference numerals in the figures are: the device comprises a 1-control end, a 2-detection end, a 3-sensor end, a 31-working electrode with a connecting end, a 32-auxiliary electrode with a connecting end, a 4-first amplifying module, a 5-second amplifying module 5, a 6-AD conversion module, a 41-first amplifying unit and a 42-second amplifying unit.
Detailed Description
The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the utility model discloses a sensor connection circuit, which comprises a control end 1, a detection end 2 and a sensor end 3;
the control end 1 is connected with one end of the detection end 2, and the other end of the detection end 2 is connected with the sensor end 3, so that the function of placing the detection end 2 and the sensor end 3 in an environment to be detected and placing the control end 2 outside the environment to be detected is realized;
in addition, the detection end 2 includes a first amplification module 4 and a second amplification module 5, the sensor end 3 is provided with a connection end working electrode 31 and a connection end auxiliary electrode 32, the first amplification module 4 is connected in series between the control end 1 and the connection end working electrode 31, and the second amplification module 5 is connected in series between the control end 1 and the connection end auxiliary electrode 32.
As described in the above embodiment, when the present utility model is in use, the control terminal 1 is disposed outside the environment to be tested and continuously acquires the acquired signal acquired by the detection terminal 2, the sensor terminal 3 is inserted into the detection terminal 2, and both the sensor terminal 3 and the detection terminal 2 are disposed in the environment to be tested, so as to prevent the condition that the control terminal 1 reads inaccurate due to the fact that the test gas in the environment to be tested enters the control terminal 1;
referring to fig. 2, meanwhile, the detection end 2 includes a first amplifying module 4 and a second amplifying module 5, and the sensor end 3 is provided with a connection end working electrode 31 and a connection end auxiliary electrode 32, it can be understood that the connection end working electrode 31 is used for transmitting a normal acquisition signal and amplifying the signal by the first amplifying module 4, so as to achieve the effect of improving the signal acquisition accuracy;
in addition, the auxiliary electrode 3 at the connection end is used for amplifying and zero current compensating through the second amplifying module 5 when the sensor end 3 acquires the acquisition signal, so that the acquisition signal transmitted by the sensor end 3 has better responsiveness and anti-interference performance.
Through the structure, through separately setting up control end 1, detection end 2 and sensor end 3, and place detection end 2 and sensor end 3 in the environment of awaiting measuring, control end 1 sets up the setting mode outside the environment of awaiting measuring, the condition that leads to the parameter inaccurate in the gas admission control end 1 in the environment of awaiting measuring has been realized preventing, simultaneously through setting up first amplification module 4 and second amplification module 5 and sending to control end 1 after amplifying the acquisition signal that the detection end obtained, thereby the degree of accuracy of acquisition signal reading has been promoted, in the middle of having solved current monitoring system among the prior art needs place whole monitoring system or equipment to be full of the environment of awaiting measuring of gas to await measuring, lead to easily because gas admission system inner structure causes the trouble when monitoring gas, the condition emergence of reading inaccuracy has been promoted the degree of acquisition signal reading.
Referring to fig. 1, in an embodiment, an AD conversion module 6 is further disposed in the detection end 2, an output end of the AD conversion module 6 is connected to the control end 1, a first input end of the AD conversion module 6 is connected to the first amplifying module 4, and a second input end of the AD conversion module 6 is connected to the second amplifying module 5, so as to implement a function of collecting a collected signal amplified by the first amplifying module 4 and the second amplifying module 5 and inputting the collected signal to the control end 1.
As described in the above embodiment, the AD conversion module 6 is configured to collect the collected signals amplified by the first amplifying module 4 and the second amplifying module 5, and input the collected signals to the control terminal 1, thereby achieving collection and arrangement of the collected signals.
Referring to fig. 2, in an embodiment, a first amplifying unit 41 and a second amplifying unit 42 are disposed in the first amplifying module 4, and a first operational amplifier U1A, a field effect transistor Q1 and a connection plug J1 are disposed in the first amplifying unit 41;
the first end of the connecting plug J1 is connected with the source electrode of the field effect tube Q1 and the positive input end of the first operational amplifier U1A, the second end of the connecting plug J1 is connected with the drain electrode of the field effect tube Q1, the third end of the connecting plug J1 is connected with the output end of the first operational amplifier U1A, the negative input end of the first operational amplifier U1A is connected with the second amplifying unit 42 and grounded, the fourth end of the connecting plug J1 is connected with the second amplifying module 5, the grid electrode of the field effect tube Q1 is connected with external power supply, and the connecting end working electrode 31 and the connecting end auxiliary electrode 32 are connected with the connecting plug J1.
As described in the above embodiment, the connection plug J1 is used to insert the sensor terminal 3 and send the collected signal collected by the sensor terminal 3 to the first amplifying module 4 for primary amplification, it can be understood that, both the connection terminal working electrode 31 and the connection terminal auxiliary electrode 32 provided on the sensor terminal 3 are inserted into the connection plug J1, and since the first amplifying module 4 is used to transmit the normal collected signal and amplify the signal by the first amplifying module 4, when the source electrode of the field effect transistor Q1 obtains the collected signal transmitted by the connection plug J1, the source electrode of the field effect transistor Q1 is actually connected to the connection terminal working electrode 31 through the connection plug J1, at this time, the field effect transistor Q1 is turned on and turned on to supply power to the outside of the gate connection of the field effect transistor Q1 and the second amplifying unit 42 connected to the drain electrode of the field effect transistor Q1, thereby realizing the function of turning on the power supply of the first amplifying unit 41 and sending the collected signal collected by the sensor terminal 3 to the first amplifying module 4 for primary amplification and then to the second amplifying unit 42 for secondary amplification.
Referring to fig. 2, in an embodiment, the first amplifying unit 41 further includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first capacitor C1;
the first end of the connecting plug J1 is connected with the source electrode of the field effect tube Q1 and one end of the second resistor R2, the second end of the connecting plug J1 is connected with the drain electrode of the field effect tube Q1, the third end of the connecting plug J1 is connected with one end of the first resistor R1, the fourth end of the connecting plug J1 is connected with the second amplifying module 5, the other end of the first resistor R1 is connected with one end of the first capacitor C1 and the output end of the first operational amplifier U1A, the positive input end of the first operational amplifier U1A is connected with one end of the third resistor R3, the other end of the third resistor R3 is connected with the other end of the first capacitor C1 and the other end of the second resistor R2, the negative input end of the first operational amplifier U1A is connected with one end of the fourth resistor R4 and one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected with the second amplifying unit 42, the grid electrode of the field effect tube Q1 is connected with one end of the fifth resistor R5, and the other end of the fifth resistor R5 is externally powered.
As described in the above embodiment, the first resistor R1 is used as an input amplifying resistor of the first operational amplifier U1A, so as to adjust the voltage of the input signal at the positive input end of the first operational amplifier U1A, thereby achieving the function of reducing signal interference.
Referring to fig. 2, in one embodiment, a second operational amplifier U1B is disposed in the second amplifying unit 42;
the positive electrode input end of the second operational amplifier U1B is connected with the drain electrode of the field effect transistor Q1, the negative electrode input end of the second operational amplifier U1B is connected with the negative electrode input end of the first operational amplifier U1A and grounded, the positive power supply end of the second operational amplifier U1B is connected with external power supply, the negative power supply end of the second operational amplifier U1B is grounded, and the output end of the second operational amplifier U1B is connected with the AD conversion module 6.
As described in the above embodiment, when the source of the fet Q1 obtains the acquisition signal transmitted by the connection plug J1, the fet Q1 is turned on and is connected to the external power supply connected to the gate of the fet Q1 and the second amplifying unit 42 connected to the drain of the fet Q1, so that the acquisition signal after the processing method performed by the first amplifying module 4 is input to the second operational amplifier U1B through the positive input end of the second operational amplifier U1B for performing the second amplification, and then output from the color output end of the second operational amplifier U1B to the AD converting module 6 for acquisition, thereby realizing the functions of turning on the power supply of the first amplifying unit 41 and simultaneously transmitting the acquisition signal acquired by the sensor end 3 to the first amplifying module 4 for performing the first amplification and then transmitting the acquisition signal to the second amplifying unit 42 for performing the second amplification and finally transmitting the acquisition signal to the AD converting module 6 for performing the acquisition.
Referring to fig. 2, in an embodiment, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5 are further disposed in the second amplifying unit 42;
the positive input end of the second operational amplifier U1B is connected to one end of the ninth resistor R9, one end of the seventh resistor R7 and one end of the second capacitor C2, the other end of the ninth resistor R9 is connected to the drain of the field effect transistor Q1, the other end of the seventh resistor R7 and the other end of the second capacitor C2 are connected to the output end of the second operational amplifier U1B and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the fifth capacitor C5 and the AD conversion module 6, the other end of the fifth capacitor C5 is grounded, the positive power end of the second operational amplifier U1B is connected to one end of the eighth resistor R8, one end of the third capacitor C3 and one end of the fourth capacitor C4 are connected to each other and to the negative power end of the second operational amplifier U1B and to ground, and the other end of the eighth resistor R8 is connected to the outside.
As described in the above embodiment, the twelfth resistor R12 is used as the input amplifying resistor of the second operational amplifier U1A, so as to adjust the voltage of the input signal at the positive input end of the second operational amplifier U1B, thereby achieving the function of reducing signal interference.
Referring to fig. 3, in one embodiment, a third operational amplifier U2A is disposed in the second amplifying module 5;
the positive input end of the third operational amplifier U2A is connected with the fourth end of the connecting plug J1, the negative input end of the third operational amplifier U2A is connected with the negative input end of the second operational amplifier U1B, the negative input end of the first operational amplifier U1A is grounded, the positive power supply end of the third operational amplifier U2A is connected with external power supply, the negative power supply end of the third operational amplifier U2A is grounded, and the output end of the third operational amplifier U2A is connected with the AD conversion module 6 and the fourth end of the connecting plug J1.
As described in the above embodiment, since the connection-side working electrode 31 and the connection-side auxiliary electrode 32 provided on the sensor side 3 are inserted into the connection plug J1, and since the second amplification module 5 is used for amplifying the collection signal and compensating the zero current, when the positive input terminal of the third operational amplifier U2A is connected to the connection plug J1, the positive input terminal of the third operational amplifier U2A is actually connected to the connection-side auxiliary electrode 32 through the connection plug J1, the third operational amplifier U2A in the second amplification module 5 performs signal amplification at this time, thereby realizing a function of multi-stage amplification for the collection signal.
Referring to fig. 3, in an embodiment, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, and a ninth capacitor C9 are further disposed in the second amplifying module 5;
one end of a twelfth resistor R12 is connected with one end of a sixth capacitor C6 and the positive input end of a third operational amplifier U2A, the other end of the twelfth resistor R12 and the other end of the sixth capacitor C6 are connected with the output end of the third operational amplifier U2A, the positive input end of the third operational amplifier U2A is also connected with one end of a thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected with the fourth end of a connecting plug J1, one end of a fifteenth resistor R15 is connected with the negative input end of the third operational amplifier U2A, the other end of the fifteenth resistor R15 is grounded, the positive power end of the third operational amplifier U2A is also connected with one end of a fourteenth resistor R14, one end of a seventh capacitor C7 and one end of an eighth capacitor C8, the other end of the fourteenth resistor R14 is connected with external power supply, the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are mutually grounded, the output end of the third operational amplifier U2A is connected with one end of a sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected with the fourth capacitor C9 and the other end of the ninth capacitor C9 is connected with the ninth capacitor C6.
As described in the above embodiment, the twelfth resistor R12 is used as the input amplifying resistor of the third operational amplifier U2A, so as to adjust the voltage of the input signal at the positive input end of the third operational amplifier U2A, thereby achieving the function of reducing signal interference.
Referring to fig. 4, in one embodiment, the AD conversion module 6 includes a conversion chip U3, a seventeenth resistor R17, an eighteenth resistor R18, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, and a fourteenth capacitor C14;
the ADDR pin and the GND pin of the conversion chip U3 are connected to each other and to the ground, the AIN0 pin of the conversion chip U3 is connected to one end of the tenth capacitor C10 and the other end of the tenth resistor R10, the AIN1 pin of the conversion chip U3 is connected to one end of the eleventh capacitor C11 and the control terminal 1, the other end of the tenth capacitor C10 and the other end of the eleventh capacitor C11 are both grounded, the SCL pin of the conversion chip U3 is connected to one end of the seventeenth resistor R17 and the control terminal 1, the SDA pin of the conversion chip U3 is connected to one end of the eighteenth resistor R18 and the control terminal 1, the other end of the seventeenth resistor R17 and the other end of the eighteenth resistor R18 are connected to each other and to external power supply, the AIN3 pin of the conversion chip U3 is connected to one end of the thirteenth capacitor C13 and the control terminal 1, and the other end of the conversion chip U2 and the sixteenth resistor C16 are connected to one end of the sixteenth resistor C16.
As described in the above embodiment, the conversion chip U3 is configured to acquire the acquisition signals amplified by the first amplifying unit 41 and the second amplifying unit, and input the amplified acquisition signals to the control terminal 1, thereby implementing collection and arrangement of the acquisition signals.
The utility model also comprises a gas monitoring system which comprises the sensor connecting circuit, so that the function of realizing gas monitoring by using the connecting structure among the control end, the detection end and the sensor end in the gas monitoring system is realized.
According to the embodiment, the control end, the detection end and the sensor end are arranged separately, the detection end and the sensor end are arranged in the environment to be detected, the control end is arranged outside the environment to be detected, the condition that the parameters are inaccurate due to the fact that gas in the environment to be detected enters the control end 1 is prevented from happening, meanwhile, the acquired signals acquired by the detection end are amplified through the first amplifying module and the second amplifying module and then are sent to the control end 1 for identification, and therefore accuracy of signal reading is improved, the problem that an existing monitoring system in the prior art needs to be arranged in the environment to be detected filled with the gas to be detected, faults are caused due to the fact that the gas enters the internal structure of the system when the gas is monitored, and accuracy of signal reading is improved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. The sensor connecting circuit is characterized by comprising a control end, a detection end and a sensor end;
the control end is connected with one end of the detection end, and the other end of the detection end is connected with the sensor end, so that the function of placing the detection end and the sensor end in an environment to be detected and placing the control end outside the environment to be detected is realized;
in addition, the detection end comprises a first amplification module and a second amplification module, a connecting end working electrode and a connecting end auxiliary electrode are arranged on the sensor end, the first amplification module is connected in series between the control end and the connecting end working electrode, and the second amplification module is connected in series between the control end and the connecting end auxiliary electrode.
2. The sensor connection circuit of claim 1, wherein an AD conversion module is further disposed in the detection end;
the output end of the AD conversion module is connected with the control end, the first input end of the AD conversion module is connected with the first amplification module, and the second input end of the AD conversion module is connected with the second amplification module, so that the functions of collecting collected signals amplified by the first amplification module and the second amplification module and inputting the collected signals to the control end are achieved.
3. The sensor connection circuit according to claim 2, wherein a first amplifying unit and a second amplifying unit are arranged in the first amplifying module, and a first operational amplifier, a field effect transistor and a connection plug are arranged in the first amplifying unit;
the first end of the connecting plug is connected with the source electrode of the field effect tube and the positive input end of the first operational amplifier, the second end of the connecting plug is connected with the drain electrode of the field effect tube, the third end of the connecting plug is connected with the output end of the first operational amplifier, the negative input end of the first operational amplifier is connected with the second amplifying unit and grounded, the fourth end of the connecting plug is connected with the second amplifying module, the grid electrode of the field effect tube is connected with external power supply, and the working electrode of the connecting end and the auxiliary electrode of the connecting end are connected with the connecting plug.
4. The sensor connection circuit of claim 3, wherein the first amplification unit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a first capacitor;
the first end of the connecting plug is connected with the source electrode of the field effect tube and one end of the second resistor, the second end of the connecting plug is connected with the drain electrode of the field effect tube, the third end of the connecting plug is connected with one end of the first resistor, the fourth end of the connecting plug is connected with the second amplifying module, the other end of the first resistor is connected with one end of the first capacitor and the output end of the first operational amplifier, the positive input end of the first operational amplifier is connected with one end of the third resistor, the other end of the third resistor is connected with the other end of the first capacitor and the other end of the second resistor, the negative input end of the first operational amplifier is connected with one end of the fourth resistor and one end of the sixth resistor, the other end of the fourth resistor is grounded, the other end of the sixth resistor is connected with the second amplifying unit, the grid electrode of the field effect tube is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the other end of the first capacitor and the second amplifying unit, and the drain electrode of the second amplifier is connected with the external power supply unit.
5. The sensor connection circuit of claim 3, wherein a second operational amplifier is provided in the second amplifying unit;
the positive electrode input end of the second operational amplifier is connected with the drain electrode of the field effect transistor, the negative electrode input end of the second operational amplifier is connected with the negative electrode input end of the first operational amplifier and grounded, the positive power supply end of the second operational amplifier is connected with external power supply, the negative power supply end of the second operational amplifier is grounded, and the output end of the second operational amplifier is connected with the AD conversion module.
6. The sensor connection circuit of claim 5, wherein a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor are further disposed in the second amplifying unit;
the positive electrode input end of the second operational amplifier is connected with one end of the ninth resistor, one end of the seventh resistor and one end of the second capacitor, the other end of the ninth resistor is connected with the drain electrode of the field effect tube, the other end of the seventh resistor and the other end of the second capacitor are connected with the output end of the second operational amplifier and one end of the tenth resistor, the other end of the tenth resistor is connected with one end of the fifth capacitor and the AD conversion module, the other end of the fifth capacitor is grounded, the positive power end of the second operational amplifier is connected with one end of the eighth resistor, one end of the third capacitor and one end of the fourth capacitor are connected, the other end of the third capacitor and the other end of the fourth capacitor are mutually connected and are connected with the negative power source end of the second operational amplifier and are grounded, and the other end of the eighth resistor is connected with external power supply.
7. The sensor connection circuit of claim 6, wherein a third operational amplifier is disposed within the second amplification module;
the positive input end of the third operational amplifier is connected with the fourth end of the connecting plug, the negative input end of the third operational amplifier is connected with the negative input end of the second operational amplifier and the negative input end of the first operational amplifier, the positive power end of the third operational amplifier is connected with external power supply, the negative power end of the third operational amplifier is grounded, and the output end of the third operational amplifier is connected with the AD conversion module and the fourth end of the connecting plug.
8. The sensor connection circuit of claim 7, wherein a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a ninth capacitor are further disposed in the second amplifying module;
one end of the twelfth resistor is connected with one end of the sixth capacitor and the positive input end of the third operational amplifier, the other end of the twelfth resistor and the other end of the sixth capacitor are connected with the output end of the third operational amplifier, the positive input end of the third operational amplifier is also connected with one end of the thirteenth resistor, the other end of the thirteenth resistor is connected with the fourth end of the connecting plug, one end of the fifteenth resistor is connected with the negative input end of the third operational amplifier, the other end of the fifteenth resistor is grounded, the positive power end of the third operational amplifier is also connected with one end of the fourteenth resistor, one end of the seventh capacitor and one end of the eighth capacitor, the other end of the fourteenth resistor is connected with external power supply, the other end of the seventh capacitor and the other end of the eighth capacitor are mutually grounded, the output end of the third operational amplifier is connected with one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the fourth end of the fourth capacitor and the ninth capacitor is connected with the ninth capacitor, and the ninth capacitor is connected with the ninth capacitor.
9. The sensor connection circuit of claim 8, wherein the AD conversion module comprises a conversion chip, a seventeenth resistor, an eighteenth resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, and a fourteenth capacitor;
the ADDR pin and the GND pin of the conversion chip are mutually connected and grounded, the AIN0 pin of the conversion chip is mutually connected with one end of a tenth capacitor and the other end of the tenth resistor, the AIN1 pin of the conversion chip is connected with one end of an eleventh capacitor and the control end, the other end of the tenth capacitor and the other end of the eleventh capacitor are both grounded, the SCL pin of the conversion chip is connected with one end of a seventeenth resistor and the control end, the SDA pin of the conversion chip is connected with one end of an eighteenth resistor and the control end, the other end of the seventeenth resistor and the other end of the eighteenth resistor are mutually connected and are connected with external power supply, the AIN3 pin of the conversion chip is connected with one end of the thirteenth capacitor and the control end, and the AIN2 pin of the conversion chip is connected with one end of the fourteenth capacitor and the other end of the sixteenth resistor.
10. A gas monitoring system comprising a sensor connection circuit as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223600465.XU CN219608871U (en) | 2022-12-30 | 2022-12-30 | Sensor connecting circuit and gas monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223600465.XU CN219608871U (en) | 2022-12-30 | 2022-12-30 | Sensor connecting circuit and gas monitoring system |
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| CN219608871U true CN219608871U (en) | 2023-08-29 |
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| CN202223600465.XU Active CN219608871U (en) | 2022-12-30 | 2022-12-30 | Sensor connecting circuit and gas monitoring system |
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