阅读说明：本技术 一种臭氧传感器基线校准系统及校准方法 (Ozone sensor baseline calibration system and calibration method ) 是由 邹贤禄 马进华 于 2021-09-16 设计创作，主要内容包括：本发明属于臭氧传感器校准技术领域,公开了一种臭氧传感器基线校准系统及校准方法,校准系统包括第一三通阀、臭氧传感器、气泵、第二三通阀、气管以及热分解室,第一三通阀的A口连通气体进口,第一三通阀的B口连通臭氧传感器,气泵连通于臭氧传感器和第二三通阀之间,第二三通阀的A口连通臭氧传感器,第二三通阀的B口连通气体出口,第一三通阀的C口和第二三通阀的C口之间连通气管,气管部分置于热分解室内。本发明通过上述校准系统以及校准方法,能够在不关停生产线的基础上,在线对臭氧传感器进行基线校准,无需拆装臭氧传感器以及配备额外的标准气体,成本更低,而且不需要启停生产线,保证了生产线的作业效率。(The invention belongs to the technical field of ozone sensor calibration, and discloses an ozone sensor baseline calibration system and a calibration method. By the aid of the calibration system and the calibration method, the ozone sensor can be calibrated on line on the basis of not shutting down the production line, the ozone sensor does not need to be disassembled or assembled and additional standard gas does not need to be prepared, cost is low, the production line does not need to be started or stopped, and operation efficiency of the production line is guaranteed.)

1. An ozone sensor baseline calibration system is characterized by comprising a first three-way valve (1), an ozone sensor (2), an air pump (3), a second three-way valve (4), an air pipe (5) and a thermal decomposition chamber (6), the A port of the first three-way valve (1) is communicated with a gas inlet, the B port of the first three-way valve (1) is communicated with the ozone sensor (2), the air pump (3) is communicated between the ozone sensor (2) and the second three-way valve (4), the A port of the second three-way valve (4) is communicated with the ozone sensor (2), the port B of the second three-way valve (4) is communicated with a gas outlet, the port C of the first three-way valve (1) and the port C of the second three-way valve (4) are communicated with the gas pipe (5), and the gas pipe (5) is partially arranged in the thermal decomposition chamber (6).

2. The ozone sensor baseline calibration system of claim 1, wherein the portion of the gas tube (5) located in the thermal decomposition chamber (6) is helical or wavy.

3. The ozone sensor baseline calibration system of claim 1 or 2, wherein a heater (61) is provided inside the thermal decomposition chamber (6).

4. The ozone sensor baseline calibration system of claim 3, wherein the heater (61) is a heating layer encased within the thermal decomposition chamber (6), the heating layer being a heating resistor.

5. The ozone sensor baseline calibration system of claim 1 or 2, wherein the outer wall of the thermal decomposition chamber (6) is coated with an insulating layer (62).

6. The ozone sensor baseline calibration system of claim 1 or 2, wherein a temperature sensor (63) is disposed within the thermal decomposition chamber (6).

7. A method of calibrating an ozone sensor baseline calibration system of any of claims 1 to 6, comprising the steps of:

controlling the connection of the port A and the port C of the first three-way valve (1), controlling the connection of the port A and the port C of the second three-way valve (4), and inputting ozone-containing gas into the gas pipe (5);

controlling a port B of the first three-way valve (1) to be communicated with a port C, and controlling the air pump (3) to circulate the air in the air pipe (5);

activating a heater (61) of a thermal decomposition chamber (6) to completely decompose ozone in the gas;

calibrating the baseline of the ozone sensor (2) to zero the ozone sensor (2).

8. Calibration method according to claim 7, characterized in that the temperature inside the pyrolysis chamber (6) is detected by a temperature sensor (63) and the heating temperature of the heater (61) is adjusted to a preset temperature according to said temperature.

9. The calibration method according to claim 8, wherein the operation of the heater (61) is stopped after controlling the heater (61) to operate at the preset temperature for a preset time.

Technical Field

The invention relates to the technical field of ozone sensor calibration, in particular to a system and a method for calibrating a baseline of an ozone sensor.

Background

In atmospheric environmental monitoring and production lines (such as air micro-stations and exhaust gas treatment production lines) using ozone-containing air, ozone detection equipment such as an ozone sensor is generally used to detect the concentration of ozone in the air. In using ozone detection equipment processes such as ozone sensor, along with the operation that lasts of production line, can appear ozone detection equipment precision such as ozone sensor inaccurate condition, in order to solve above-mentioned problem, it is current generally to shut down the production line, breaks away from the production line with ozone detection equipment such as ozone sensor afterwards and carries out the baseline calibration and return to zero, still need not contain the standard gas of ozone when returning to zero, again with ozone detection equipment such as ozone sensor installation return production line after returning to zero, then restart the operation production line.

The baseline calibration method needs to disassemble and install ozone detection equipment such as an ozone sensor and the like, and also needs to prepare standard gas, so that the cost is high, and on the other hand, the start and stop of the production line can cause the operating efficiency of the production line to be low.

Disclosure of Invention

The invention aims to provide a baseline calibration system and a baseline calibration method for an ozone sensor, which can calibrate the baseline of the ozone sensor on line on the basis of not shutting down a production line, reduce the cost and improve the operation efficiency of the production line.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an ozone sensor baseline calbiration system, includes first three-way valve, ozone sensor, air pump, second three-way valve, trachea and thermolysis room, the gaseous import of A mouth intercommunication of first three-way valve, the B mouth intercommunication of first three-way valve the ozone sensor, the air pump communicate in the ozone sensor with between the second three-way valve, the A mouth intercommunication of second three-way valve the ozone sensor, the gaseous export of B mouth intercommunication of second three-way valve, the C mouth of first three-way valve with communicate between the C mouth of second three-way valve the trachea, the trachea part is arranged in the thermolysis room.

Preferably, a portion of the gas pipe located in the pyrolysis chamber is formed in a spiral shape or a wave shape.

Preferably, a heater is provided inside the pyrolysis chamber.

Preferably, the heater is a heating layer coated in the thermal decomposition chamber, and the heating layer is a heating resistor.

Preferably, the outer wall of the pyrolysis chamber is coated with an insulating layer.

Preferably, a temperature sensor is provided in the pyrolysis chamber.

The invention also provides a calibration method of the ozone sensor baseline calibration system, which comprises the following steps:

controlling the connection of the port A and the port C of the first three-way valve, controlling the connection of the port A and the port C of the second three-way valve, and inputting ozone-containing gas into the gas pipe;

controlling the port B of the first three-way valve to be communicated with the port C of the first three-way valve, and controlling an air pump to circulate the air in the air pipe;

starting a heater of a thermal decomposition chamber to completely decompose ozone in the gas;

calibrating a baseline of the ozone sensor to zero the ozone sensor.

Preferably, the temperature in the thermal decomposition chamber is detected by a temperature sensor, and the heating temperature of the heater is adjusted to a preset temperature according to the temperature.

Preferably, the heater is controlled to operate at the preset temperature for a preset time, and then the operation of the heater is stopped.

The invention has the beneficial effects that: when the baseline of the ozone sensor is calibrated, only the air containing ozone is conveyed into the air pipe, then the opening B of the first three-way valve is controlled to be communicated with the opening C of the second three-way valve, the opening A of the second three-way valve is controlled to be communicated with the opening C of the second three-way valve, the air in the air pipe circularly flows through the air pump, then the ozone in the air is completely decomposed through the thermal decomposition chamber to form standard gas, and then the baseline of the ozone sensor can be calibrated on line, so that the baseline of the ozone sensor is enabled to be zero.

By the aid of the calibration system and the calibration method, the ozone sensor can be calibrated on line on the basis of not shutting down the production line, the ozone sensor does not need to be disassembled or assembled and additional standard gas does not need to be prepared, cost is low, the production line does not need to be started or stopped, and operation efficiency of the production line is guaranteed.

Drawings

FIG. 1 is a schematic diagram of the basic calibration system of the ozone sensor according to the present invention.

In the figure:

1. a first three-way valve; 2. an ozone sensor; 3. an air pump; 4. a second three-way valve; 5. an air tube; 6. a thermal decomposition chamber; 61. a heater; 62. a heat-insulating layer; 63. a temperature sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In order to perform baseline calibration on the ozone sensor 2 on line without shutting down the production line, the invention provides an ozone sensor baseline calibration system, as shown in fig. 1, which comprises a first three-way valve 1, an ozone sensor 2, an air pump 3, a second three-way valve 4, an air pipe 5 and a thermal decomposition chamber 6, wherein: the A mouth of above-mentioned first three-way valve 1 communicates gaseous import, the B mouth of first three-way valve 1 communicates ozone sensor 2, air pump 3 communicates between ozone sensor 2 and second three-way valve 4, the A mouth of second three-way valve 4 communicates ozone sensor 2, the B mouth of second three-way valve 4 communicates gaseous export, intercommunication trachea 5 between the C mouth of first three-way valve 1 and the C mouth of second three-way valve 4, trachea 5 part is arranged in thermal decomposition room 6.

When the baseline calibration of the ozone sensor 2 is not performed, the communication between the port A and the port B of the first three-way valve 1 is controlled, the communication between the port A and the port B of the second three-way valve 4 is controlled, ozone-containing gas can enter the port A of the first three-way valve 1 through the gas inlet, and flows out through the gas outlet after sequentially passing through the first three-way valve 1, the ozone sensor 2, the gas pump 3 and the second three-way valve 4, and in the process, the ozone sensor 2 detects the concentration of ozone in the gas. When the baseline calibration of the ozone sensor 2 needs to be carried out, the port A and the port C of the first three-way valve 1 are controlled to be communicated, the port A and the port C of the second three-way valve 4 are controlled to be communicated, then ozone-containing gas is input into the gas pipe 5 through the gas inlet, the port B and the port C of the first three-way valve 1 are controlled to be communicated, and the gas in the circulating gas pipe 5 of the gas pump 3 is controlled. Then control thermal decomposition chamber 6 again and carry out thermal decomposition to the gas in trachea 5 to fall off ozone completely, control the gas in trachea 5 through air pump 3 moreover and circulate many times and flow, can be better with ozone complete decomposition, can calibrate 2 baselines of ozone sensor this moment, make ozone sensor 2 return to zero.

In this embodiment, the part of the gas pipe 5 located in the thermal decomposition chamber 6 is spiral, and through the spiral distribution mode, the length of the gas pipe 5 located in the thermal decomposition chamber 6 can be increased, and the time for the gas containing ozone to stay in the thermal decomposition chamber 6 is also increased, so that the thermal decomposition efficiency of ozone can be improved, and ozone can be completely decomposed in a high-temperature state. It is understood that the portion of the gas pipe 5 located in the thermal decomposition chamber 6 is wavy, and may be other shapes that can extend the length of the gas pipe 5 located in the thermal decomposition chamber 6.

A heater 61 is provided in the thermal decomposition chamber 6 to heat the interior of the thermal decomposition chamber 6, and further to heat the gas in the gas pipe 5, thereby achieving the purpose of decomposing ozone. Preferably, the heater 61 may be a heating layer enclosed in the thermal decomposition chamber 6, and the heating layer may be a heating resistor or other structures capable of heating. In addition, the form of cladding in pyrolysis chamber 6 is adopted, can make the heating in pyrolysis chamber 6 more even, and then just also make the gas in trachea 5 be heated evenly, and the ozonolysis effect is better.

Furthermore, the outer wall of the thermal decomposition chamber 6 is covered with an insulating layer 62, and the heat in the thermal decomposition chamber 6 is prevented from being dissipated through the insulating layer 62, so as to prevent the temperature in the thermal decomposition chamber 6 from reaching the ozone decomposition requirement.

In this embodiment, a temperature sensor 63 is further disposed in the thermal decomposition chamber 6, and the temperature sensor 63 is used for detecting the temperature in the thermal decomposition chamber 6, so as to precisely control the temperature in the thermal decomposition chamber 6 to meet a preset temperature, which meets the requirement of ozone decomposition. Note that the temperature in the thermal decomposition chamber 6 is detected by the temperature sensor 63, and the heater 61 may be controlled to increase the heating temperature when the temperature is lower than a preset temperature, and the heater 61 may be controlled to decrease the heating temperature when the temperature is higher than the preset temperature. The preset temperature may be a specific value or a range of values.

It should be noted that, since the gas pipe 5 located in the thermal decomposition chamber 6 is spiral or wavy, the thermal decomposition chamber 6 of the present embodiment can be smaller in volume, and thus can be easily integrated into the equipment of the production line.

The above-mentioned ozone sensor baseline calibration system of this embodiment, when carrying out the baseline calibration of ozone sensor 2, only need to carry the air that contains ozone to trachea 5, control the B mouth and the C mouth intercommunication of first three-way valve 1 afterwards, control the A mouth and the C mouth intercommunication of second three-way valve 4, make the gas circulation flow in trachea 5 through air pump 3, later make the ozone in the gas decompose completely through thermal decomposition chamber 6 and form standard gas, then can carry out the calibration to ozone sensor 2 baseline on line, make ozone sensor 2 return to zero. Through the calibration system and the calibration method, the ozone sensor 2 can be calibrated on line on the basis of not shutting down the production line, the ozone sensor 2 does not need to be disassembled and assembled, extra standard gas is not needed to be prepared, the cost is lower, the production line does not need to be started and stopped, and the operation efficiency of the production line is ensured.

The invention also provides a calibration method of the ozone sensor baseline calibration system, which comprises the following steps:

s1, controlling the connection of the port A and the port C of the first three-way valve 1, controlling the connection of the port A and the port C of the second three-way valve 4, and inputting the gas containing ozone into the gas pipe 5.

That is, when the baseline calibration is performed, the ozone-containing gas is supplied into the gas pipe 5.

And S2, controlling the connection of the port B and the port C of the first three-way valve 1 and controlling the air pump 3 to circulate the air in the air pipe 5.

S3, the heater 61 of the thermal decomposition chamber 6 is activated to completely decompose the ozone in the gas.

In this step, the heater 61 is controlled to operate at a preset temperature for a preset time, and then the operation of the heater 61 is stopped, and by setting the preset time, it is possible to ensure that the ozone in the gas can be completely decomposed.

S4, calibrating the baseline of ozone sensor 2 and zeroing ozone sensor 2.

After the baseline calibration of the ozone sensor 2 is completed, the communication between the port A and the port B of the first three-way valve 1 is controlled, the communication between the port A and the port B of the second three-way valve 4 is controlled, the gas containing ozone can sequentially pass through the first three-way valve 1, the ozone sensor 2, the air pump 3 and the second three-way valve 4 and then flows out through the gas outlet, and the ozone sensor 2 detects the ozone concentration in the gas in real time.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.