CN103575763A - Circuit and method for automatic zero calibration for sensor - Google Patents
Circuit and method for automatic zero calibration for sensor Download PDFInfo
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- CN103575763A CN103575763A CN201210269841.3A CN201210269841A CN103575763A CN 103575763 A CN103575763 A CN 103575763A CN 201210269841 A CN201210269841 A CN 201210269841A CN 103575763 A CN103575763 A CN 103575763A
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Abstract
The invention discloses a circuit and method for automatic zero calibration for a sensor. The circuit comprises a detector, a compensator, two resistors, a voltage output circuit and a controller, wherein the detector, the compensator, the first resistor and the second resistor are electrically connected to form a single-armed bridge; one end of the controller is connected with the public electrical connecting end of the detector and the compensator, and the other end of the controller is connected with the public electrical connecting end of the first resistor and the second resistor; the controller is used for detecting the output voltage of the single-armed bridge and judging whether the output voltage is normal, and if not, the controller generates a control signal according to the output voltage and sends the control signal; one end of the voltage output circuit is electrically connected with the controller, and the other end of the voltage output circuit is connected with the public electrical connecting end of the first resistor and the second resistor; the voltage output circuit is used for receiving the control signal sent by the controller and outputting voltage for regulating the output voltage of the single-armed bridge to be zero according to the control signal. The circuit and the method can calibrate the zero of the sensor so as to realize that the sensor detects accurate gas concentration.
Description
Technical field
The present invention relates to gas sensor technical field, more particularly, relate to a kind of to the circuit of sensor automatic zero point correcting and method.
Background technology
What at present, the detection of gas concentration is mainly adopted is gas sensor.As shown in Figure 1, the sensor that mainly is also claimed black element, compensator 12 also to claim white element to form by detecting device 11, two external balance resistance R1 and R2, adjustable resistance R3 form existing gas concentration testing circuit.
In process gas concentration being detected at gas sensor, owing to existing, black-and-white component is uneven, the variation of the temperature of gas sensor working environment, humidity, pressure, gas sensor service time is long and gas sensor in the reason such as catalyst consumption, easily cause drift about the zero point of gas sensor, when zero point of sensor occurs with drift in the same way of gas reaction, can cause output voltage values while there is no tested gas around, cause false alarm; When zero point of sensor, the drift reverse with gas reaction occurred, can cause output voltage values is negative value, and while having tested gas around, output valve can not reacting gas concentration, sensor function is lost efficacy, initiation potential; Therefore for fear of gas sensor when the work because zero point drift causes false alarm or disabler, need to be by regulating adjustable resistance R3 to calibrating the zero point of sensor.
But existing adjusting adjustable resistance R3, to calibrating the zero point of sensor, is mainly that intelligent degree is low by observing the artificial adjusting adjustable resistance R3 of magnitude of voltage of output terminal, calibrate the zero point to sensor that can not be real-time.
Summary of the invention
In view of this, the invention provides a kind of to the circuit of sensor automatic zero point correcting and method, can be automatically to calibrating the zero point of sensor to realize, and then realize and make sensor detect gas concentration accurately.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of circuit to sensor automatic zero point correcting, comprising: detecting device, compensator, the first resistance, the second resistance, voltage follower circuit and controller; Wherein:
After being electrically connected to, described detecting device, compensator, the first resistance and the second resistance forms wheatstone bridge;
Described controller one end is connected with the common electrical link of described detecting device and compensator, the other end is connected with the common electrical link of described the first resistance and the second resistance, output voltage for detection of described wheatstone bridge, and judge that whether described output voltage is normal, if undesired, according to described output voltage, generate control signal, and send described control signal;
Described voltage follower circuit one end is electrically connected to described controller, the other end is connected with the common electrical link of described the first resistance and the second resistance, the described control signal sending for receiving described controller, and be zero voltage according to the described wheatstone bridge output voltage of described control signal output adjusting.
Preferably, described controller comprises: detecting unit, judging unit, control signal generation unit and transmitting element; Wherein:
Described detecting unit is connected with described judging unit, for detection of the output voltage of described wheatstone bridge;
Described judging unit is connected with described control signal generation unit, for judging whether described output voltage is fixed value or negative value within a certain period of time;
Described control signal generation unit is connected with described transmitting element, when judging described output voltage within a certain period of time for fixed value or negative value when described judging unit, generates control signal;
Described transmitting element is connected with described voltage follower circuit, for described control signal is sent to described voltage follower circuit.
A method to sensor automatic zero point correcting, comprising:
Detect the output voltage of wheatstone bridge;
Judge that whether described output voltage is normal, if undesired, according to described output voltage, generate control signal;
According to described control signal, the output voltage of described wheatstone bridge is set to zero.
Preferably, the output voltage of described detection wheatstone bridge is specially:
By the detecting unit in the controller being connected with described wheatstone bridge, detect the output voltage of described wheatstone bridge.
Preferably, describedly judge that whether described output voltage is normal, if undesired, according to described output voltage, generate control signal and be specially:
By the judging unit in described controller, judge whether described output voltage is fixed value or negative value within a certain period of time;
When described output voltage is fixed value or negative value within a certain period of time, the signal generation unit in described controller generates control signal according to described output voltage.
Preferably, describedly according to described control signal, the output voltage of described wheatstone bridge is set to zero and is specially:
By the transmitting element in described controller, described control signal is sent to the voltage follower circuit being connected with described controller;
It is zero voltage that described voltage follower circuit regulates wheatstone bridge output voltage according to the described control signal output receiving.
From above-mentioned technical scheme, can find out, the sensor of a kind of automatic zero point correcting disclosed by the invention and method, by controller, wheatstone bridge output voltage is detected in real time, and whether the output voltage that judgement detects is normal, when output voltage is undesired, generate control signal, controlling voltage follower circuit output adjusting wheatstone bridge output voltage is zero voltage, realized when the zero point of sensor, drift occurred sensor is carried out to automatic zero point correcting; In the zero point correction process of the sensor, can automatically complete by controller, without artificial participation, make the zero point correction of sensor more real-time, convenient, fast and accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed gas concentration testing circuit of prior art figure;
Fig. 2 is the disclosed a kind of circuit diagram to sensor automatic zero point correcting of the embodiment of the present invention;
Fig. 3 is the structural representation of the disclosed controller of another embodiment of the present invention;
Fig. 4 is the disclosed a kind of method flow diagram to sensor automatic zero point correcting of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of to the circuit of sensor automatic zero point correcting and method, can be automatically to calibrating the zero point of sensor to realize, and then realize and make sensor detect gas concentration accurately.
As shown in Figure 2, the disclosed a kind of circuit to sensor automatic zero point correcting of embodiment, comprising: detecting device 21, compensator 22, the first resistance 23, the second resistance 24, voltage follower circuit 25 and controller 26; Wherein:
After being electrically connected to, detecting device 21, compensator 22, the first resistance 23 and the second resistance 24 forms wheatstone bridge;
In the above-described embodiments, when sensor is started working, by power input, to sensor, provide fixing operating voltage.
When sensor is during in initial stage of operation, detecting device (black element) 21 and compensator (white element) 22 enters warm-up phase, now the voltage of wheatstone bridge output terminal will be by high step-down, when detecting device (black element) 21 and compensator (white element) 22 is through reaching after thermal equilibrium after a while, now the output end voltage of wheatstone bridge should be zero, and the zero point of sensor;
Therefore, in order to make the sensor can be in state at zero point before gas concentration is detected, at detecting device (black element) 21 and compensator (white element) 22, enter warm-up phase, the voltage of wheatstone bridge output terminal is in the process of high step-down, by controller 26, detect the output end voltage of wheatstone bridge, according to output voltage, generate control signal, and the control signal of generation is sent to voltage follower circuit 25, it is zero voltage that voltage follower circuit 25 regulates wheatstone bridge output voltage according to the control signal output receiving.
When sensor starts gas concentration to detect after initialization, while having detected gas to exist, detecting device (black element) 21 and gas generation oxidation reaction, the heat producing rises the resistance of black element, compensator (white element) 22 does not react with gas, white component resistance can not change, electric bridge out of trim, output and the directly proportional voltage signal of gas concentration;
When if the voltage of the wheatstone bridge output terminal now detecting by controller 26 is a fixed voltage value within a period of time, show that sensor exists zero point drift at this moment, the voltage of the wheatstone bridge output terminal that need to detect according to controller 26 generates control signal, and this control signal is sent to voltage follower circuit 25, it is zero voltage that voltage follower circuit 25 makes wheatstone bridge output voltage according to the control signal output receiving.
Or, when if the voltage of the wheatstone bridge output terminal now detecting by controller 26 is negative value, show that sensor exists reverse excursion at this moment, the voltage of the wheatstone bridge output terminal that need to detect according to controller 26 generates control signal, and this control signal is sent to voltage follower circuit 25, it is zero voltage that voltage follower circuit 25 makes wheatstone bridge output voltage according to the control signal output receiving.
In above-mentioned working sensor process, by controller, wheatstone bridge output voltage is detected in real time, and whether the output voltage that judgement detects is normal in each stage, when output voltage is undesired, generate control signal, control the voltage that voltage follower circuit output regulates wheatstone bridge output voltage, realized when the zero point of sensor, drift occurred, without artificial participation, real-time, convenient, fast and accurate sensor is carried out to automatic zero point correcting.
The disclosed controller architecture schematic diagram of another embodiment of the present invention, as shown in Figure 3, comprising:
Detecting unit 31, judging unit 32, control signal generation unit 33 and transmitting element 34; Wherein:
Detecting unit 31 is connected with judging unit 32, for detection of the output voltage of described wheatstone bridge;
Control signal generation unit 33 is connected with transmitting element 34, for when the described output voltage of judging unit 32 judgement is fixed value or negative value within a certain period of time, generates control signal;
Transmitting element 34 is connected with described voltage follower circuit, for described control signal is sent to described voltage follower circuit.
Concrete, initial phase at sensor, the voltage of the wheatstone bridge output terminal detecting when judging unit 32 judgement detecting units 31 is during by high step-down, the output voltage that control signal generation unit 33 detects according to detecting unit 31 generates control signal, transmitting element 34 is sent to voltage follower circuit 25 by the control signal of generation, and it is zero voltage that voltage follower circuit 25 regulates wheatstone bridge output voltage according to the control signal output receiving;
While starting gas concentration to detect after initialization at sensor, if the voltage of the wheatstone bridge output terminal now detecting by judging unit 32 judgement detecting units 31 is a fixed voltage value within a period of time, show that sensor exists zero point drift at this moment, the output voltage that control signal generation unit 33 detects according to detecting unit 31 generates control signal, transmitting element 34 is sent to voltage follower circuit 25 by the control signal of generation, and it is zero voltage that voltage follower circuit 25 regulates wheatstone bridge output voltage according to the control signal output receiving;
Or, when if the voltage of the wheatstone bridge output terminal now detecting by judging unit 32 judgement detecting units 31 is negative value, show that sensor exists reverse excursion at this moment, the output voltage that control signal generation unit 33 detects according to detecting unit 31 generates control signal, transmitting element 34 is sent to voltage follower circuit 25 by the control signal of generation, and it is zero voltage that voltage follower circuit 25 regulates wheatstone bridge output voltage according to the control signal output receiving.
Another embodiment of the present invention discloses a kind of method of sensor automatic zero point correcting, as shown in Figure 4, comprising:
The output voltage of S101, detection wheatstone bridge;
S102, judge that whether described output voltage is normal, if undesired, enter step S103;
S103, according to described output voltage, generate control signal;
S104, according to described control signal, the output voltage of described wheatstone bridge is set to zero.
In the above-described embodiments, detecting device in sensor (black element) and compensator (white element) enter warm-up phase, the voltage of wheatstone bridge output terminal is in the process of high step-down, by controller, detect the output end voltage of wheatstone bridge, according to output voltage, generate control signal, and the control signal of generation is sent to voltage follower circuit, it is zero voltage that voltage follower circuit makes wheatstone bridge output voltage according to the control signal output receiving.
When sensor starts gas concentration to detect after initialization, while having detected gas to exist, when if the voltage of the wheatstone bridge output terminal now detecting by controller is a fixed voltage value within a period of time, show that sensor exists zero point drift at this moment, the voltage of the wheatstone bridge output terminal that need to detect according to controller generates control signal, and this control signal is sent to voltage follower circuit, it is zero voltage that voltage follower circuit makes wheatstone bridge output voltage according to the control signal output receiving.
Or, when if the voltage of the wheatstone bridge output terminal now detecting by controller is negative value, show that sensor exists reverse excursion at this moment, the voltage of the wheatstone bridge output terminal that need to detect according to controller generates control signal, and this control signal is sent to voltage follower circuit, it is zero voltage that voltage follower circuit makes wheatstone bridge output voltage according to the control signal output receiving.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. the circuit to sensor automatic zero point correcting, is characterized in that, comprising: detecting device, compensator, the first resistance, the second resistance, voltage follower circuit and controller; Wherein:
After being electrically connected to, described detecting device, compensator, the first resistance and the second resistance forms wheatstone bridge;
Described controller one end is connected with the common electrical link of described detecting device and compensator, the other end is connected with the common electrical link of described the first resistance and the second resistance, output voltage for detection of described wheatstone bridge, and judge that whether described output voltage is normal, if undesired, according to described output voltage, generate control signal, and send described control signal;
Described voltage follower circuit one end is electrically connected to described controller, the other end is connected with the common electrical link of described the first resistance and the second resistance, the described control signal sending for receiving described controller, and be zero voltage according to the described wheatstone bridge output voltage of described control signal output adjusting.
2. sensor according to claim 1, is characterized in that, described controller comprises: detecting unit, judging unit, control signal generation unit and transmitting element; Wherein:
Described detecting unit is connected with described judging unit, for detection of the output voltage of described wheatstone bridge;
Described judging unit is connected with described control signal generation unit, for judging whether described output voltage is fixed value within a certain period of time or is negative value;
Described control signal generation unit is connected with described transmitting element, when judging described output voltage within a certain period of time for fixed value or negative value when described judging unit, generates control signal;
Described transmitting element is connected with described voltage follower circuit, for described control signal is sent to described voltage follower circuit.
3. the method to sensor automatic zero point correcting, is characterized in that, comprising:
Detect the output voltage of wheatstone bridge;
Judge that whether described output voltage is normal, if undesired, according to described output voltage, generate control signal;
According to described control signal, the output voltage of described wheatstone bridge is set to zero.
4. method according to claim 3, is characterized in that, the output voltage of described detection wheatstone bridge is specially:
By the detecting unit in the controller being connected with described wheatstone bridge, detect the output voltage of described wheatstone bridge.
5. method according to claim 4, is characterized in that, describedly judges that whether described output voltage is normal, according to described output voltage, generates control signal be specially if undesired:
By the judging unit in described controller, judge whether described output voltage is fixed value or negative value within a certain period of time;
When described output voltage is fixed value or negative value within a certain period of time, the signal generation unit in described controller generates control signal according to described output voltage.
6. method according to claim 5, is characterized in that, describedly according to described control signal, the output voltage of described wheatstone bridge is set to zero and is specially:
By the transmitting element in described controller, described control signal is sent to the voltage follower circuit being connected with described controller;
It is zero voltage that described voltage follower circuit regulates wheatstone bridge output voltage according to the described control signal output receiving.
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| CN201210269841.3A CN103575763A (en) | 2012-07-30 | 2012-07-30 | Circuit and method for automatic zero calibration for sensor |
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| CN201210269841.3A CN103575763A (en) | 2012-07-30 | 2012-07-30 | Circuit and method for automatic zero calibration for sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510399A (en) * | 2014-10-10 | 2016-04-20 | 福特环球技术公司 | Compensating oxygen sensor aging |
| CN105675660A (en) * | 2016-04-29 | 2016-06-15 | 国网上海市电力公司 | Bridge compensating circuit of insulating gas feature sensor |
| CN105911106A (en) * | 2016-04-29 | 2016-08-31 | 国网上海市电力公司 | Insulating gas state detection system for GIS (gas insulated switchgear) equipment |
| CN109444225A (en) * | 2018-12-27 | 2019-03-08 | 上海因士环保科技有限公司 | A kind of resisting temperature, baseline drift gas sensor system and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0132933A2 (en) * | 1983-07-22 | 1985-02-13 | Plessey Overseas Limited | Adaptive line hybrids |
| CN1072019A (en) * | 1991-10-25 | 1993-05-12 | 北京科技大学 | A kind of earth stress measuring method of complete temperature compensation and device |
| CN1376911A (en) * | 2001-03-27 | 2002-10-30 | 湘潭工学院 | Analysis linearizing and automatic heat capacity compensating method for intelligent calorimeter |
| CN202329930U (en) * | 2011-11-17 | 2012-07-11 | 上海神开石油化工装备股份有限公司 | Convenient zero adjustment device for clamping-type torque sensor |
| CN202903724U (en) * | 2012-07-30 | 2013-04-24 | 河南汉威电子股份有限公司 | Circuit for automatic zero calibration of sensor |
-
2012
- 2012-07-30 CN CN201210269841.3A patent/CN103575763A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0132933A2 (en) * | 1983-07-22 | 1985-02-13 | Plessey Overseas Limited | Adaptive line hybrids |
| CN1072019A (en) * | 1991-10-25 | 1993-05-12 | 北京科技大学 | A kind of earth stress measuring method of complete temperature compensation and device |
| CN1376911A (en) * | 2001-03-27 | 2002-10-30 | 湘潭工学院 | Analysis linearizing and automatic heat capacity compensating method for intelligent calorimeter |
| CN202329930U (en) * | 2011-11-17 | 2012-07-11 | 上海神开石油化工装备股份有限公司 | Convenient zero adjustment device for clamping-type torque sensor |
| CN202903724U (en) * | 2012-07-30 | 2013-04-24 | 河南汉威电子股份有限公司 | Circuit for automatic zero calibration of sensor |
Non-Patent Citations (2)
| Title |
|---|
| 刘国忠等: "自动调零应变测量电路的设计", 《传感器世界》 * |
| 张伯虎: "电桥测量的自动回零", 《武警技术学院学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510399A (en) * | 2014-10-10 | 2016-04-20 | 福特环球技术公司 | Compensating oxygen sensor aging |
| US10620154B2 (en) | 2014-10-10 | 2020-04-14 | Ford Global Technologies, Llc | Compensating oxygen sensor aging |
| CN105675660A (en) * | 2016-04-29 | 2016-06-15 | 国网上海市电力公司 | Bridge compensating circuit of insulating gas feature sensor |
| CN105911106A (en) * | 2016-04-29 | 2016-08-31 | 国网上海市电力公司 | Insulating gas state detection system for GIS (gas insulated switchgear) equipment |
| CN105911106B (en) * | 2016-04-29 | 2018-12-11 | 国网上海市电力公司 | The insulating gas condition detecting system of GIS device |
| CN105675660B (en) * | 2016-04-29 | 2018-12-11 | 国网上海市电力公司 | The bridge-type compensation circuit of insulating gas feature sensor |
| CN109444225A (en) * | 2018-12-27 | 2019-03-08 | 上海因士环保科技有限公司 | A kind of resisting temperature, baseline drift gas sensor system and application method |
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