CN211348130U - Combined gas distribution equipment for automatic calibration of gas sensor - Google Patents
Combined gas distribution equipment for automatic calibration of gas sensor Download PDFInfo
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- CN211348130U CN211348130U CN201922104056.2U CN201922104056U CN211348130U CN 211348130 U CN211348130 U CN 211348130U CN 201922104056 U CN201922104056 U CN 201922104056U CN 211348130 U CN211348130 U CN 211348130U
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Abstract
The utility model provides a combination distribution equipment for automatic calibration of gas sensor, including standard gas cylinder, incubator and distribution control device, distribution control device includes solenoid valve, air duct, infrared analyzer, flowmeter and microprocessor, the air inlet of incubator is connected through the air duct to the standard gas cylinder, the flowmeter sets up in the air duct, in order to gather the standard gas flow that passes through the air duct; a gas detection interface of the infrared analyzer is arranged in the incubator to detect the gas concentration in the incubator in real time; the microprocessor is connected with the infrared analyzer, and is used for acquiring the gas content of the standard gas in the incubator and calculating the gas content difference of the standard gas in the incubator; the microprocessor is connected with the electromagnetic valve, and controls the opening and closing of the electromagnetic valve according to the gas content difference of the standard gas in the incubator and the standard gas flow passing through the gas guide tube.
Description
Technical Field
The utility model relates to a sensor field of maring, specific theory has related to a combination distribution equipment for automatic calibration of gas sensor.
Background
The output of the gas sensor is related to two degrees of freedom of gas concentration and ambient temperature, wherein the gas concentration is a measured physical quantity, and the ambient temperature is an interference physical quantity; in order to ensure the performance of each gas sensor, high and low temperature experiments are carried out on the sensor products one by one to obtain calibration data of the sensor products; the essence of gas sensor calibration is the mapping relationship between the raw analog signal of the sensor at different temperatures and the gas concentration in a given measurement range. In the prior art, the gas sensors are calibrated and need to be dynamically distributed, the procedures need manual operation, the labor cost of products is high, each sensor needs an independent gas distribution gas circuit and a standard gas cylinder during calibration, and the gas sensor calibration method has the defects of multiple devices, high material cost and low efficiency.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a combination distribution equipment that equipment is simple, with low costs can be used for gas sensor automatic calibration is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a combined gas distribution device for automatic calibration of gas sensors comprises a standard gas cylinder, a warm box and a gas distribution control device, wherein a plurality of gas sensors are arranged in the warm box; the gas distribution control device comprises an electromagnetic valve, a gas guide pipe, an infrared analyzer, a flow meter and a microprocessor, wherein the outlet of the standard gas cylinder is connected with the inlet of the electromagnetic valve, the outlet of the electromagnetic valve is connected with the inlet of the gas guide pipe, and the outlet of the gas guide pipe is connected with the gas inlet of the incubator; the air guide pipe is connected with an air inlet of the incubator, and the flowmeter is arranged in the air guide pipe to collect the standard air flow passing through the air guide pipe; a gas detection interface of the infrared analyzer is arranged in the incubator to detect the gas concentration in the incubator in real time; the microprocessor is connected with the infrared analyzer, and is used for acquiring the gas content of the standard gas in the incubator and calculating the gas content difference of the standard gas in the incubator; the flow meter is connected with the microprocessor and sends the collected standard gas flow passing through the gas guide tube to the microprocessor; the microprocessor is connected with the electromagnetic valve, and controls the opening and closing of the electromagnetic valve according to the gas content difference of the standard gas in the incubator and the standard gas flow passing through the gas guide tube.
Based on the above, be provided with the fan in the incubator.
Based on the above, the infrared analyzer is arranged at the top of the incubator.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model, the infrared analyzer is arranged to lead the concentration change of the standard gas in the incubator to be timely obtained, and the corresponding standard gas is injected into the incubator through the flowmeter and the electromagnetic valve to maintain the constant quantity of the standard gas in the incubator; the incubator is internally provided with a plurality of gas sensors, so that the calibration of the plurality of gas sensors can be realized through once gas distribution, the equipment and the process are saved, and the incubator has the advantages of low cost, automation and high efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
The utility model provides a combined gas distribution device for automatic calibration of gas sensors, as shown in figure 1, comprising a standard gas cylinder, a warm box and a gas distribution control device, wherein a plurality of gas sensors are arranged in the warm box; the temperature curve is also preset in the incubator, and the incubator automatically operates according to the temperature curve in the working process so as to simulate different site temperature environment temperature environments and improve the environment self-adaptive capacity of the gas sensor.
The gas distribution control device comprises an electromagnetic valve, a gas guide pipe, an infrared analyzer, a flow meter and a microprocessor, preferably, the infrared analyzer is arranged at the bottom of the incubator; the outlet of the standard gas cylinder is connected with the inlet of the electromagnetic valve, the outlet of the electromagnetic valve is connected with the inlet of the gas guide pipe, and the outlet of the gas guide pipe is connected with the gas inlet of the incubator; the air guide pipe is connected with an air inlet of the incubator, and the flowmeter is arranged in the air guide pipe to collect the standard air flow passing through the air guide pipe; a gas detection interface of the infrared analyzer is arranged in the incubator to detect the gas concentration in the incubator in real time; the microprocessor is connected with the infrared analyzer, and is used for acquiring the gas content of the standard gas in the incubator and calculating the gas content difference of the standard gas in the incubator; the flow meter is connected with the microprocessor and sends the collected standard gas flow passing through the gas guide tube to the microprocessor; the microprocessor is connected with the electromagnetic valve, and controls the opening and closing of the electromagnetic valve according to the gas content difference of the standard gas in the incubator and the standard gas flow passing through the gas guide tube.
Furthermore, a fan is arranged in the incubator, so that the standard gas is uniformly distributed in the incubator, and the gas concentration at each position in the incubator is the same.
The utility model can timely acquire the concentration change of the standard gas in the incubator by arranging the infrared analyzer, and inject the corresponding standard gas into the incubator through the flowmeter and the electromagnetic valve to maintain the constant amount of the standard gas in the incubator; the incubator is internally provided with a plurality of gas sensors, so that the calibration of the plurality of gas sensors can be realized through once gas distribution, the equipment and the process are saved, and the incubator has the advantages of low cost, automation and high efficiency.
The automatic calibration of the gas sensor needs to be carried out by matching with a field industrial control computer, wherein sensor data acquisition calibration software is installed on the field industrial control computer; placing a plurality of gas sensors in the incubator, and connecting the plurality of gas sensors with an on-site industrial control computer through a sensor centralized tool; and assembling and connecting the combined gas distribution equipment, and respectively connecting the temperature box and the electromagnetic valve with an on-site industrial control computer.
Before calibration, a set of temperature curve and concentration curve is formulated through calibration software according to the measuring range, the zero point and the working environment temperature of the gas sensor to be calibrated, and the temperature curve is issued to the incubator;
during calibration, zero calibration is performed, for example, calibration temperatures of 0 ℃, 25 ℃, 30 ℃ and 40 ℃ are set through software, and the calibration temperatures are calibrated in a gas sensor zero concentration environment. Controlling the electromagnetic valve to open through the field industrial control computer, and configuring a zero point according to a concentration curve to calibrate the required gas concentration; after the configuration is finished, the electromagnetic valve is closed, meanwhile, the gas concentration in the incubator is detected in real time through a gas detection interface of the infrared analyzer, the microprocessor calculates the gas content change of the standard gas in the incubator according to the obtained gas content of the standard gas in the incubator, controls the electromagnetic valve to be opened to supplement the standard gas in the incubator when the gas content is reduced, collects the standard gas flow flowing through the gas guide tube through the flowmeter, and controls the electromagnetic valve to be closed when the standard gas flow flowing through the gas guide tube is equal to the gas content change quantity of the standard gas in the incubator, so that the gas concentration in the incubator is stabilized in the concentration range. The fan can be turned on to make the gas concentration in the incubator uniformly distributed. At this time, the incubator automatically operates according to a built-in temperature profile, so that the incubator is stabilized at a set calibration temperature, such as 0 ℃, 25 ℃, 30 ℃ and 40 ℃, for a period of time, such as 120 minutes.
In the process, the temperature and the concentration in the incubator need to be observed through software, and when the temperature and the concentration are stable, a calibration command is issued through the software to calibrate the gas sensor.
Similarly, span point calibration is required to be carried out on the gas sensor; in order to improve the precision, a plurality of concentration points can be taken between the zero point and the span point for calibration, and then the characteristic value of each calibration point is written into the sensor.
After the calibration of the gas sensor is completed according to the set concentration curve and the set temperature curve, the reverse direction of the set concentration curve and the set temperature curve is detected, the calibration is performed again when the concentration of the gas exceeds the standard gas concentration, the measured return difference of the gas sensor is ensured to be within a specified range, and the return difference range can be set on calibration software.
And an open interface is reserved on the field industrial control computer, so that diversified requirements and customized requirements of customers are facilitated. After the rule setting is completed, a series of operations such as calibration, acquisition, gas distribution and the like are all automatically completed without human intervention, and the method has the advantages of high braking degree, intellectualization and less human interference factors.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (3)
1. The utility model provides a combination gas distribution equipment for gas sensor automatic calibration which characterized in that: the gas distribution device comprises a standard gas cylinder, a warm box and a gas distribution control device, wherein a plurality of gas sensors are arranged in the warm box; the gas distribution control device comprises an electromagnetic valve, a gas guide pipe, an infrared analyzer, a flow meter and a microprocessor, wherein the outlet of the standard gas cylinder is connected with the inlet of the electromagnetic valve, the outlet of the electromagnetic valve is connected with the inlet of the gas guide pipe, and the outlet of the gas guide pipe is connected with the gas inlet of the incubator; the air guide pipe is connected with an air inlet of the incubator, and the flowmeter is arranged in the air guide pipe to collect the standard air flow passing through the air guide pipe; a gas detection interface of the infrared analyzer is arranged in the incubator to detect the gas concentration in the incubator in real time; the microprocessor is connected with the infrared analyzer, and is used for acquiring the gas content of the standard gas in the incubator and calculating the gas content difference of the standard gas in the incubator; the flow meter is connected with the microprocessor and sends the collected standard gas flow passing through the gas guide tube to the microprocessor; the microprocessor is connected with the electromagnetic valve, and controls the opening and closing of the electromagnetic valve according to the gas content difference of the standard gas in the incubator and the standard gas flow passing through the gas guide tube.
2. The combined gas distribution apparatus for automatic calibration of a gas sensor according to claim 1, wherein: a fan is arranged in the incubator.
3. The combined gas distribution apparatus for automatic calibration of gas sensors according to claim 1 or 2, characterized in that: the infrared analyzer is arranged at the top of the incubator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104056.2U CN211348130U (en) | 2019-11-29 | 2019-11-29 | Combined gas distribution equipment for automatic calibration of gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104056.2U CN211348130U (en) | 2019-11-29 | 2019-11-29 | Combined gas distribution equipment for automatic calibration of gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211348130U true CN211348130U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922104056.2U Active CN211348130U (en) | 2019-11-29 | 2019-11-29 | Combined gas distribution equipment for automatic calibration of gas sensor |
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| Country | Link |
|---|---|
| CN (1) | CN211348130U (en) |
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2019
- 2019-11-29 CN CN201922104056.2U patent/CN211348130U/en active Active
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