CN206649007U - Gas sensor temperature compensation means - Google Patents
Gas sensor temperature compensation means Download PDFInfo
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- CN206649007U CN206649007U CN201720084018.3U CN201720084018U CN206649007U CN 206649007 U CN206649007 U CN 206649007U CN 201720084018 U CN201720084018 U CN 201720084018U CN 206649007 U CN206649007 U CN 206649007U
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Abstract
A kind of gas sensor temperature compensation means of the utility model, including for monitor gas concentration, experience gas temperature height change, monitoring of environmental temperature value probe module；For a temperature-compensating, temperature sensor signal conditioning, realize gas concentration and the signal condition and data acquisition module of ambient temperature data collection；Computer module for secondary temperature-compensating；The device is used for a kind of gas sensor temperature compensation, including a temperature-compensating, signal transacting, secondary temperature-compensating：The utility model realizes the rough temperature-compensating to gas sensor by a temperature-compensating；Secondary temperature-compensating is carried out by computer, realizes the accurate temperature-compensating to gas sensor；Using the thermo-sensitive resistor near gas sensor, the acquisition of gas sensor temperature drift variable quantity signal is realized；Effect temperature compensation is the method increase, avoids the cumbersome and time-consuming of debugging, while algorithm is simple, convergence, it is easy to realize, avoids cost caused by high complexity.
Description
Technical field
The utility model belongs to gas concentration measurement technical field, and in particular to a kind of gas sensor temperature-compensating dress
Put.
Background technology
Gas sensor is during gas concentration on-line monitoring, due to the fluctuation of environment temperature, its measured value and reality
Value can produce certain error, high accuracy, low concentration gas-monitoring during, the influence of environment temperature is especially pronounced.
At present, the temperature compensation of gas sensor mainly has temperature-compensating based on hardware circuit and based on nerve net
Both modes of the software temperature compensation of network.Temperature compensation based on hardware circuit is mainly the temperature by sensor proximity
Quick resistance, signal condition is carried out, obtain consistent temperature compensation circuit approximate with Sensor temperature drift characteristic, sensor output and temperature compensation electricity
Road output makes the difference, that is, realizes hardware based temperature-compensating.
Software temperature compensation method based on neutral net is mainly defeated under gas sensor different temperatures by measuring
Go out value, using Linear Network Function Fitting, successive ignition, obtain the weights under minimal error.With reference to gas sensor annex
The test value of temperature sensor and the weights of iteration, it is possible to achieve the software temperature compensation based on neutral net.
In above-mentioned conventional art, for based on hardware temperatures compensation method, due to temperature compensation circuit debugging, needing regulation resistance
Value, implements that process is cumbersome, time-consuming, can only typically carry out rough temperature-compensating, it is more difficult to realizes accurately temperature-compensating.
For the software temperature compensation method based on neutral net, because neural network algorithm needs to establish more network
, not convergent possibility be present in the factor such as structure, complexity, real-time constraint by software algorithm.In realization, add
The complexity of system software and time-consuming cost, software configuration is complex, poor for the practicality of gas concentration on-line monitoring.
In addition for carrying out temperature-compensating using two sensors, that is, a sensor is selected as temperature sensor, it is right
Another sensor carry out temperature-compensating, it is possible to achieve the temperature-compensating under the dynamic environment of gas sensor, due to by
The limitation of sensor processing technology, it is difficult to realize the sensory characteristic of two gas sensors and the feelings that temperature characterisitic is completely the same
Condition, using the compensation method, the output valve of gas sensor can introduce the error of two gas sensor inconsistencies, there is also
Some problems.
Utility model content
The purpose of this utility model is that to solve the above problems and provides a kind of gas sensor temperature-compensating dress
Put.
The utility model is achieved through the following technical solutions above-mentioned purpose：
Gas sensor temperature compensation means,
Including for monitor gas concentration, experience gas temperature height change, monitoring of environmental temperature value probe module；
For a temperature-compensating, temperature sensor signal conditioning, realize gas concentration and ambient temperature data collection
Signal condition and data acquisition module；
Computer module for secondary temperature-compensating；
The signal output part of probe module is connected with the signal input part of signal condition and data acquisition module, signal condition
It is connected with the signal output part of data acquisition module and the signal input part of computer module.
Specifically, probe module includes gas sensor, thermo-sensitive resistor and the numeral for direct monitoring of environmental temperature value
Formula temperature sensor, signal condition and data acquisition module include hardware temperature compensation circuit, temperature sensor measuring circuit,
Subtraction circuit, A/D converter, main control unit FPGA and USB change-over circuit, the signal input part difference of hardware temperature compensation circuit
It is connected with the signal output part of thermo-sensitive resistor and the signal output part of gas sensor, signal output part and the temperature of temperature sensor
Spend the signal input part connection of the signal conditioning circuit of sensor, the gas sensor output signal end of hardware temperature compensation circuit
Connected with (+) end of subtraction circuit, the temperature-compensating output signal end of hardware temperature compensation circuit and (-) end of subtraction circuit connect
Connect, the signal output part of subtraction circuit and the signal input part of A/D converter connect, the signal output part of A/D converter and master
Control unit F PGA signal input part connection, main control unit FPGA signal output part and the signal input part of USB change-over circuits
Connection, the signal output part of USB change-over circuits and the signal input part of computer module connect, the letter of digital temperature sensor
The signal input part of number output end and the measuring circuit of temperature sensor connects, and the measuring circuit of temperature sensor is with I2C interface
It is connected with main control unit FPGA.
The beneficial effects of the utility model are：
The utility model realizes the rough temperature-compensating to gas sensor by a temperature-compensating；Pass through calculating
Machine carries out secondary temperature-compensating, realizes the accurate temperature-compensating to gas sensor；Using temperature sensitive near gas sensor
Resistance, realize the acquisition of gas sensor temperature drift variable quantity signal；Effect temperature compensation is the method increase, avoids debugging
It is cumbersome and time-consuming, while algorithm is simple, convergence, and it is easy to realize, avoids cost caused by high complexity.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is the structural representation of signal condition and data acquisition module in the utility model.
In figure：101st, probe module；102nd, signal condition and data acquisition module；103rd, computer module；201st, hardware
Temperature-compensation circuit；202nd, the measuring circuit of temperature sensor；203rd, subtraction circuit；204th, A/D converter；205th, main control unit
FPGA；206th, USB change-over circuits.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, gas sensor temperature compensation means,
Including for monitor gas concentration, experience gas temperature height change, monitoring of environmental temperature value probe module
101；
For a temperature-compensating, temperature sensor signal conditioning, realize gas concentration and ambient temperature data collection
Signal condition and data acquisition module 102；
Computer module 103 for secondary temperature-compensating；
The signal output part of probe module 101 is connected with signal condition with the signal input part of data acquisition module 102, letter
Number conditioning is connected with the signal output part of data acquisition module 102 with the signal input part of computer module 103.
Specifically, probe module 101 includes gas sensor, thermo-sensitive resistor and the number for direct monitoring of environmental temperature value
Word formula temperature sensor, signal condition and data acquisition module 102 include hardware temperature compensation circuit 201, temperature sensor
Measuring circuit 202, subtraction circuit 203, A/D converter 204, main control unit FPGA205 and USB conversion letter circuit 206, hardware temperature
The signal input part for spending compensation circuit 201 connects with the signal output part of thermo-sensitive resistor and the signal output part of gas sensor respectively
Connect, the signal input part connection of the signal output part of temperature sensor and the signal conditioning circuit of temperature sensor, hardware temperatures
The gas sensor output signal end of compensation circuit 201 and (+) end of subtraction circuit 203 connect, hardware temperature compensation circuit 201
(-) end of temperature-compensating output signal end and subtraction circuit 203 connect, signal output part and the A/D of subtraction circuit 203 are changed
The signal input part connection of device 204, the signal output part of A/D converter 204 connect with main control unit FPGA205 signal input part
Connect, main control unit FPGA205 signal output part and USB, which are changed, believes that the signal input part of circuit 206 is connected, USB conversion letter electricity
The signal output part on road 206 is connected with the signal input part of computer module 103, the signal output part of digital temperature sensor
Be connected with the signal input part of the measuring circuit 202 of temperature sensor, the measuring circuit 202 of temperature sensor with I2C interface with
Main control unit FPGA205 connections.
A kind of gas sensor temperature compensation, comprises the following steps：
First, a temperature-compensating：
1. experiencing tested gas temperature height by thermo-sensitive resistor to change, caused signal is transmitted to hardware temperatures and compensated
Circuit 201 is amplified, filtered, and obtains changing output signal unanimous on the whole with gas sensor temperature drift；Pass through gas sensing
Device is measured to tested gas concentration, and the concentration signal that hardware temperature compensation circuit 201 measures gas sensor is put
Greatly, filter, obtain output signal of the gas sensor compared with high s/n ratio；
2. output signal unanimous on the whole will be changed with gas sensor temperature drift and gas sensor is defeated compared with high s/n ratio
Go out (-) end and (+) end that signal is respectively fed to subtraction circuit 203, realize gas sensor once by the subtraction circuit 203
Temperature-compensating, obtain the gas concentration signal after compensating for the first time；
2nd, signal transacting：
1. main control unit FPGA205 controls A/D converter 204 that the gas concentration signal after first time compensation is carried out into A/D
Conversion, the gas concentration signal after compensating first time are digitized, and the gas after first time compensation after being changed is dense
Spend data signal；
2. the gas concentration data signal after first time is compensated is sent into USB conversion letter circuits by main control unit FPGA205
206；
3. USB conversions letter circuit 206 is converted to the gas concentration data signal after first time compensation the usb communication of standard
Signal, and it is sent into computer；
4. the tested gas of digital temperature sensor measurement obtains digital temperature signal, digital temperature signal is by master control
Unit F PGA205 is sent into USB conversion letter circuits 206, is re-fed into computer.
3rd, secondary temperature-compensating：
1. computer is to test and record under condition of different temperatures first, gas sensor is after a temperature-compensating
Gas concentration value；Wherein normal temperature is T0, and gas sensor test value is H0；T1, T2, T3 and T4 are different temperature values,
Record T1, T2 (T1＆T2<T0 gas sensor test value H1, H2 at a temperature of)；Record T3, T4 (T3＆T4>T0 gas at a temperature of)
Sensor test value H3, H4；
According to formula Hm=A × Tm+B；With least square fitting algorithm, temperature corrected parameter A, B numerical value are obtained；
For the gas sensor test value at a temperature of Tm to be fitted to the concentration value under normal temperature is T0, further according to formula
H=Hm-A × (Tm-T0)；
It can obtain the concentration determination value after second of temperature-compensating；
During formal beginning concentration monitor, temperature corrected parameter A, B corresponding to gas sensor are called, with reference to digital temperature
The ambient temperature value that sensor measures in real time, secondary temperature-compensating amendment is carried out to gas concentration data, that is, obtain second of temperature
Concentration value after degree compensation, the concentration value after second of temperature-compensating are high accuracy, the numerical value of high stable.
The main feature of the utility model gas sensor temperature compensation means：
(1) this patent realizes gas sensor using a first temperature-compensating, then the mode of the secondary temperature-compensating of computer
The accurate compensation of temperature, it ensure that higher measuring accuracy requirement.
(2) this patent employs hardware temperature compensation circuit 201, and simple temperature-compensating electricity is realized using thermo-sensitive resistor
Road, mentality of designing is simple, and debugging is convenient.
(3) method that this patent employs the secondary temperature-compensating of computer, using least-squares algorithm, temperature compensation parameter is realized
Solve, solve it is simple, be easily achieved, the problem of in the absence of not restraining.
(4) this patent calls temperature compensation parameter using computer control mode, it is possible to achieve variety classes, different temperatures characteristic
Gas sensor temperature-compensating.
(5) the temperature compensation scheme that a temp compensation method of this patent design and secondary temp compensation method combine, is also applied for non-gas
The temperature-compensating of body sensor.
General principle, principal character and advantage of the present utility model has been shown and described above.The technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change
And improvement, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model requires protection scope
Defined by appended claims and its effect thing.
Claims (2)
1. gas sensor temperature compensation means, it is characterised in that：
Including for monitor gas concentration, experience gas temperature height change, monitoring of environmental temperature value probe module；
For a temperature-compensating, temperature sensor signal conditioning, realize gas concentration and the signal of ambient temperature data collection
Conditioning and data acquisition module；
Computer module for secondary temperature-compensating；
The signal output part of probe module is connected with the signal input part of signal condition and data acquisition module, signal condition and number
Connected according to the signal output part of acquisition module and the signal input part of computer module.
2. gas sensor temperature compensation means according to claim 1, it is characterised in that：Probe module includes gas sensing
Device, thermo-sensitive resistor and the digital temperature sensor for direct monitoring of environmental temperature value, signal condition and data acquisition module
Including hardware temperature compensation circuit, the measuring circuit of temperature sensor, subtraction circuit, A/D converter, main control unit FPGA and
USB change-over circuits, the signal input part of the hardware temperature compensation circuit signal output part and gas sensing with thermo-sensitive resistor respectively
The signal of the signal output part connection of device, the signal output part of temperature sensor and the signal conditioning circuit of temperature sensor inputs
End connection, the gas sensor output signal end of hardware temperature compensation circuit and (+) end of subtraction circuit are connected, and hardware temperatures are mended
(-) end of the temperature-compensating output signal end and subtraction circuit of repaying circuit is connected, and signal output part and the A/D of subtraction circuit are changed
The signal input part connection of device, the signal output part of A/D converter are connected with main control unit FPGA signal input part, master control list
First FPGA signal output part is connected with the signal input part of USB change-over circuits, the signal output part of USB change-over circuits and calculating
The letter of the signal input part connection of machine module, the signal output part of digital temperature sensor and the measuring circuit of temperature sensor
The connection of number input, the measuring circuit of temperature sensor are connected with I2C interface with main control unit FPGA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720084018.3U CN206649007U (en) | 2017-01-20 | 2017-01-20 | Gas sensor temperature compensation means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720084018.3U CN206649007U (en) | 2017-01-20 | 2017-01-20 | Gas sensor temperature compensation means |
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| Publication Number | Publication Date |
|---|---|
| CN206649007U true CN206649007U (en) | 2017-11-17 |
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| CN201720084018.3U Active CN206649007U (en) | 2017-01-20 | 2017-01-20 | Gas sensor temperature compensation means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706859A (en) * | 2017-01-20 | 2017-05-24 | 中国工程物理研究院总体工程研究所 | Gas sensor temperature compensation device and method |
| CN110084300A (en) * | 2019-04-24 | 2019-08-02 | 广东瑞德智能科技股份有限公司 | A kind of household unusual odor monitoring method and system |
-
2017
- 2017-01-20 CN CN201720084018.3U patent/CN206649007U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706859A (en) * | 2017-01-20 | 2017-05-24 | 中国工程物理研究院总体工程研究所 | Gas sensor temperature compensation device and method |
| CN110084300A (en) * | 2019-04-24 | 2019-08-02 | 广东瑞德智能科技股份有限公司 | A kind of household unusual odor monitoring method and system |
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