CN205506786U - Gas sensor's demarcation frock - Google Patents
Gas sensor's demarcation frock Download PDFInfo
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- CN205506786U CN205506786U CN201620083607.5U CN201620083607U CN205506786U CN 205506786 U CN205506786 U CN 205506786U CN 201620083607 U CN201620083607 U CN 201620083607U CN 205506786 U CN205506786 U CN 205506786U
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Abstract
The utility model provides a gas sensor's demarcation frock, belongs to the technical field of gas sensor test, includes that this demarcations frock divides into groups to set up with the help of the pipeline was introduced mouthful with gas sensor gaseous respectively, the discharge port is connected gaseous generating device of calibration and gas analysis appearance, includes the sensor group that the gas sensor that sets up by establishing ties forms in every group, sensor group's gaseous introduction mouth, discharge port respectively with calibrate gaseous generating device and gas analysis appearance and be connected. The utility model discloses the batch of demarcation and sensor of the same race is demarcated when can realize different sensors.
Description
Technical field
This utility model belongs to the technical field of gas sensor test, relates to the demarcation frock of a kind of gas sensor, by the way of using calibrating gas calibration, substantially increases accuracy and the consistent degree of gas sensor.
Background technology
Current each big and medium-sized cities environmental monitoring central site monitoring air quality generally uses the traditional monitoring system through Environmental Protection Agency's certification.Traditional detecting system the whole series price is about 1,000,000 RMB, and expensive and system bulk is big, and cost of installation and maintenance is the highest, limits their infield and is unsuitable for highly dense deployment way.Therefore from the air quality of the entirety macroscopically reflecting city, but the quality of the air quality of regional area, specific region can not can only be reflected from microcosmic.
Gas sensor is a kind of transducer that certain gas volume fraction changes into the corresponding signal of telecommunication, is used for detecting the content of certain gas component in air.With use traditional analysis air quality detector device compared with, gas sensor has the advantage such as fast response time, with low cost, volume microminiaturization, be badly in need of high density layout air quality monitoring application in there is great potential.But the restriction due to gas sensitive, and the uncertainty of miniaturization sensor processing technique in process of production is higher, generally there is the shortcomings such as cross interference between gas, accuracy is relatively low, concordance is poor in gas sensor, therefore, gas sensor is mainly as qualitative or half-quantitative detection means at present, seriously limits its extensive application in the gas-monitoring with high-precision requirement.
Utility model content
Generally there is the shortcomings such as cross interference between gas, accuracy is relatively low, concordance is poor in this utility model for solving gas sensor in prior art, cause in the technical problem applying low precision during the course, it is provided that the demarcation frock of the gas sensor that a kind of accuracy is high, concordance is good and scaling method.
This utility model the technical scheme is that for realizing its purpose
A kind of demarcation frock of gas sensor, including the calibration gas generating means being connected with the gas introduction port of gas sensor, outlet respectively by pipeline and gas analyser, the packet of this demarcation frock is arranged, often group includes the sensor group being made up of the gas sensor being arranged in series, and the gas introduction port of sensor group, outlet are connected with calibration gas generating means and gas analyser respectively.Wherein, often group can arrange one group or be arranged in parallel many group sensor groups in demarcating frock.
Described gas sensor configuration includes: be fixed with sensing element demarcates air chamber, the upper end cover being connected by connector with demarcation air chamber, the circuit board being connected with data acquisition unit, electric power system it is provided with on described upper end cover, the circuit board other end is connected with gas sensor, and the gas introduction port demarcating air chamber connects with calibration gas generating means and gas analyser by pipeline respectively with outlet.
Described connector is threaded or snaps connection.
Upper end cover and the junction demarcating air chamber are provided with O-ring and silicone gasket.
Described calibration gas generating means includes the dynamic calibration instrument being connected by the gas introduction port of pipeline with sensor group, the steel cylinder gas being connected with dynamic calibration instrument entrance and Zero gas generator.
The sensor group connection pipeline with dynamic calibration instrument is provided with suspended body flowmeter.
The exit of gas analyser connects vacuum unit.
Being provided with emptying arm connecting dynamic calibration instrument on the pipeline of air chamber with demarcating, emptying arm is connected with vacuum unit.
Described data acquisition unit is data collecting card.
Scaling method principle of the present utility model is: first, builds demarcation frock and installs gas sensor, according to gas sensor range ability, producing the range gas of variable concentrations in dynamic calibration instrument；Second, under each range gas concentration, gather primary output signal and the gas analyser testing result of gas sensor respectively；3rd, the detection data of above-mentioned gas sensor primary output signal and gas analyser are compared, it is thus achieved that the corresponding relation between gas sensor primary signal and dusty gas concentration；4th, the output signal of gas sensor can be made to be converted to the concentration value of correspondence according to corresponding relation, reach calibration request.
The beneficial effects of the utility model are:
The demarcation frock of the gas sensor that this utility model is announced can be made up of a plurality of gas passage, can connect in every gas passage multiple demarcation air chamber, each gas passage both can each carry out the demarcation of gas with various sensor, it is also possible to calibration same gas sensor the most simultaneously.Therefore, the motility between ductility and the path of this frock wall scroll path, demarcates while can realizing different sensors and sensor of the same race batch is demarcated, and is effectively increased work efficiency.After scaling method of the present utility model is calibrated, gas sensor has high accuracy and high concordance in application process in batches.
Accompanying drawing explanation
Fig. 1 is the structural representation that this utility model demarcates frock.
Fig. 2 is to demarcate the structural representation that in frock, many groups of sensor group is arranged shown in Fig. 1.
Fig. 3 is the structural representation of gas sensor in Fig. 1.
Fig. 4 is the structural representation of sensing element in gas sensor in Fig. 2.
Fig. 5 is single-point calibration and the flow chart of multiple spot calibration in this utility model embodiment.
In accompanying drawing, 101 represent dynamic calibration instrument, and 102 represent steel cylinder gas, 103 represent Zero gas generator, 104 represent suspended body flowmeter, and 2 represent gas sensor, and 201 represent circuit board, 202 represent upper end cover, 203 represent sensing element, and 204 represent demarcation air chamber, and 3 represent gas analyser, 4 represent vacuum unit, and 5 represent emptying arm.
Detailed description of the invention
Generally there is the shortcomings such as cross interference between gas, accuracy is relatively low, concordance is poor in this utility model for solving gas sensor in prior art, cause in the technical problem applying low precision during the course, provide demarcation frock and the scaling method of the gas sensor that a kind of accuracy is high, concordance is good, below in conjunction with specific embodiment, this utility model is further described.
It is made up of as it is shown in figure 1, this utility model is demarcated frock calibration gas generating means, demarcation air chamber and gas analyser.In calibration process, (least concentration is 0 to be produced finite concentration by calibration gas generating means according to the performance indications of tested gas sensor, maximum concentration is the full scale detectable concentration of gas sensor, or selects the concentration range below full scale according to applied environment) certain calibrating gas (SO2、CO2、CO、NO2、NO、CH4、H2、NH3Or O3Deng), as range gas, and with certain flow rate by calibration gas circuit and corresponding gas analyser.Under this condition, in calibration gas circuit, gas sensor is in identical gaseous environment with gas analyser.The same group of gas sensor that gas sensor to be calibrated is same gas demarcated in frock；Gas sensor to be calibrated in the demarcation frock of different groups can be the gas sensor of same gas, it is also possible to be the gas sensor of gas the most of the same race.
Embodiment 1
With SO2Gas sensor is gas sensor to be calibrated
Single-point calibration: by SO2Steel cylinder gas 102 provides fixing high standard concentration SO2Calibrating gas, there is diluent gas in Zero gas generator 103, this two-way gas mixes in dynamic calibration instrument 101 SO producing certain mixing ratio2Calibration gas (range gas), according to SO to be calibrated2Gas sensor quantity, suspended body flowmeter sequentially enter in the demarcation air chamber of series connection, with SO to be calibrated after adjusting flow2Gas sensor contacts, and gathers SO by data acquisition unit2The output signal of gas sensor, last SO2Calibration gas enters SO2In gas analyser, detect SO2Actual concentrations.In work, electric power system is SO to be calibrated by circuit board2Gas sensor provides 5V voltage, uses～the 1 each SO to be calibrated of collection2The output signal of gas sensor.
The SO that will collect2Gas sensor output signal and SO2The actual concentrations of gas analyser detection is analyzed, carry out the performance evaluation of each sensor, obtain the corresponding relation between sensor signal and dusty gas concentration, according to the corresponding relation obtained, sensor output signal is carried out slope intercept process, the sensor output signal collected is converted into the concentration value of correspondence；Repeat above-mentioned single-point calibration process, again obtain sensor output signal and gas analyser detection data, the sensor output signal obtained twice and gas analyser detection data compare, judge that gas sensor output signal and gas analyser detection data are whether in range of error, it is, sensor performance is up to standard, and demarcation completes；No, repeat above-mentioned all operations, until sensor is intracardiac up to standard.
Multiple spot is calibrated: by SO2Steel cylinder gas 102 provides fixing high standard concentration SO2Calibrating gas, there is diluent gas in Zero gas generator 103, this two-way gas mixes in dynamic calibration instrument 101 SO producing certain mixing ratio2Calibration gas (range gas), according to SO2The range of gas sensor, obtains the SO of variable concentrations2Calibration gas, SO2First calibration gas carries out being further separated into different group alignment unit, according to often organizing SO to be calibrated in alignment unit2Gas sensor quantity, suspended body flowmeter sequentially enter in the demarcation air chamber of series connection, with SO to be calibrated after adjusting flow2Gas sensor contacts, and gathers SO in each group of alignment unit by data acquisition unit2The output signal of gas sensor, SO in last each group alignment unit2Calibration gas enters SO2In gas analyser, detect SO in each group of alignment unit2Actual concentrations.In work, electric power system is SO to be calibrated by circuit board2Gas sensor provides 5V voltage, uses～the 1 each SO to be calibrated of collection2The output signal of gas sensor.
The SO that will collect2Gas sensor output signal and SO2The actual concentrations of gas analyser detection is analyzed, and carries out the performance evaluation of each sensor.The SO that will collect2Gas sensor output signal and SO2The actual concentrations of gas analyser detection is analyzed, carry out the performance evaluation of each sensor, obtain the corresponding relation between sensor signal and dusty gas concentration, according to the corresponding relation obtained, sensor output signal is carried out slope intercept process, the sensor output signal collected is converted into the concentration value of correspondence；Repeat above-mentioned single-point calibration process, again obtain sensor output signal and gas analyser detection data, the sensor output signal obtained twice and gas analyser detection data compare, judge that gas sensor output signal and gas analyser detection data are whether in range of error, it is, sensor performance is up to standard, and demarcation completes；No, repeat above-mentioned all operations, until sensor is intracardiac up to standard.
Above flow process can determine whether other gases cross interference situation to SO2 sensor by change steel cylinder gas.
Claims (9)
1. the demarcation frock of a gas sensor, including the calibration gas generating means being connected with the gas introduction port of gas sensor (2), outlet respectively by pipeline and gas analyser (3), it is characterized in that, the packet of this demarcation frock is arranged, often group includes the sensor group being made up of the gas sensor (2) being arranged in series, and the gas introduction port of sensor group, outlet are connected with calibration gas generating means and gas analyser (3) respectively.
The demarcation frock of a kind of gas sensor the most according to claim 1, it is characterized in that, described gas sensor (2) structure includes: be fixed with the demarcation air chamber (204) of sensing element (203), the upper end cover (202) being connected with demarcation air chamber (204) by connector, it is provided with and data acquisition unit on described upper end cover (202), the circuit board (201) that electric power system is connected, circuit board (201) other end is connected with gas sensor (2), the gas introduction port demarcating air chamber (204) connects with calibration gas generating means and gas analyser (3) by pipeline respectively with outlet.
The demarcation frock of a kind of gas sensor the most according to claim 2, it is characterised in that: described connector is threaded or snaps connection.
The demarcation frock of a kind of gas sensor the most according to claim 2, it is characterised in that: upper end cover (202) and the junction demarcating air chamber (204) are provided with O-ring and silicone gasket.
The demarcation frock of a kind of gas sensor the most according to claim 1, it is characterized in that: described calibration gas generating means includes the dynamic calibration instrument (101) being connected by the gas introduction port of pipeline with sensor group, the steel cylinder gas (102) being connected with dynamic calibration instrument (101) entrance and Zero gas generator (103).
The demarcation frock of a kind of gas sensor the most according to claim 5, it is characterised in that: on the sensor group connection pipeline with dynamic calibration instrument (101), it is provided with suspended body flowmeter (104).
The demarcation frock of a kind of gas sensor the most according to claim 1, it is characterised in that: the exit of gas analyser (3) connects vacuum unit (4).
The demarcation frock of a kind of gas sensor the most according to claim 1, it is characterized in that: being provided with emptying arm (5) connecting dynamic calibration instrument (101) on the pipeline of air chamber (204) with demarcating, emptying arm (5) is connected with vacuum unit (4).
The demarcation frock of a kind of gas sensor the most according to claim 2, it is characterised in that: described data acquisition unit is data collecting card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620083607.5U CN205506786U (en) | 2016-01-28 | 2016-01-28 | Gas sensor's demarcation frock |
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| CN201620083607.5U CN205506786U (en) | 2016-01-28 | 2016-01-28 | Gas sensor's demarcation frock |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572307A (en) * | 2016-01-28 | 2016-05-11 | 河北先河环保科技股份有限公司 | Calibration tool for gas sensors and calibration method |
| CN110018274A (en) * | 2019-02-04 | 2019-07-16 | 北京东方智明科技有限公司 | A kind of gas detection sensor scaling method not depending on calibrating gas |
| CN112710342A (en) * | 2020-12-14 | 2021-04-27 | 重庆交通大学 | Universal calibration device for fluid multi-parameter detection instrument |
| CN113777233A (en) * | 2021-08-30 | 2021-12-10 | 广西玉柴机器股份有限公司 | Detecting NOxSensor accuracy device and use method |
-
2016
- 2016-01-28 CN CN201620083607.5U patent/CN205506786U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572307A (en) * | 2016-01-28 | 2016-05-11 | 河北先河环保科技股份有限公司 | Calibration tool for gas sensors and calibration method |
| CN110018274A (en) * | 2019-02-04 | 2019-07-16 | 北京东方智明科技有限公司 | A kind of gas detection sensor scaling method not depending on calibrating gas |
| CN112710342A (en) * | 2020-12-14 | 2021-04-27 | 重庆交通大学 | Universal calibration device for fluid multi-parameter detection instrument |
| CN113777233A (en) * | 2021-08-30 | 2021-12-10 | 广西玉柴机器股份有限公司 | Detecting NOxSensor accuracy device and use method |
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