CN216484846U - Calibration device - Google Patents
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- CN216484846U CN216484846U CN202122314683.6U CN202122314683U CN216484846U CN 216484846 U CN216484846 U CN 216484846U CN 202122314683 U CN202122314683 U CN 202122314683U CN 216484846 U CN216484846 U CN 216484846U
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Abstract
The utility model relates to a calibration device, which comprises a detection unit provided with an air sensor for detecting air quality, an operation unit capable of receiving and processing data and a calibration unit capable of calibrating a detection value obtained by detecting air by the air sensor, wherein the calibration unit is provided with a gas storage chamber for storing standard gas.
Description
Technical Field
The utility model relates to the technical field of check of detection equipment, in particular to a calibration device for air detection.
Background
Urbanization and industrialization cause air pollution in urban development, and air treatment apparatuses are widely used in homes, offices, and automobiles in order to purify air to improve air quality. Typically the air treatment device may further comprise an air sensor and a processor. The air sensor measures air quality and provides a measurement output, and the processor then reads the measurement output of the air sensor and controls the air quality indicator to give an indication to the user based on the measurement output of the air sensor. However, the measurement output of the air sensor may drift over time, and the air sensor itself may show inconsistencies between measurements even in the same batch, and thus the air quality indicator may give a wrong indication to the user. Therefore, it is desirable to provide a calibration device to achieve calibration of an air sensor.
One embodiment of CN 103328968B provides an air treatment device. The air treatment device comprises: an air purification unit configured to purify air; an air sensor configured to measure a first amount of air and provide a measurement output, wherein the first amount of air includes air purified by the air purification unit; and a processor configured to generate a first value based on the measurement output of the air sensor in order to calibrate the air sensor. With the air treatment device of one embodiment of the utility model, clean air (i.e., zero-level air) is generated locally by the air treatment device for calibrating the air sensor without generating zero-level air externally, which provides convenience to a user or other operator performing calibration of the air sensor of the air treatment device. Another embodiment of the utility model also provides a method of calibrating an air sensor of an air treatment device. The method comprises the following steps: purifying air by using the air treatment device; and obtaining a first value by measuring a first amount of air using the air sensor to calibrate the air sensor. However, the standard gas used in the calibration device of the patent is zero-order air purified by an own purification unit, and the zero-order air has a certain deviation relative to the standard gas, so that the detection result cannot be accurately calibrated, and the calibration result is more poor than the actual result due to drift of the air sensor.
CN 107402287B discloses a checking device of an air quality detector, which comprises a box body, a standard metering device, a data processing module and a gas charging device; the box body is a sealable box body, and a gas inlet to be detected is arranged on the box body; the standard metering device is arranged in the box body and used for detecting the standard concentration of gas in the box body; the gas filling device is connected with the box body through a gas inlet to be detected and is used for filling gas to be detected into the box body; the data processing module is respectively connected with the standard metering device and the air quality detector and used for receiving and processing real-time data detected by the standard metering device and the air quality detector and calibrating the air quality detector according to the real-time data. According to the utility model, the air quality detectors are placed in the test box body, connected with the data processing module and compared with data measured by the standard metering device, so that the multiple air quality detectors are calibrated simultaneously. However, the calibration device of the patent uses the gas concentration in the box detected by the standard metering device as the standard concentration to calibrate the air quality detector, but the gas in the box is a non-standard gas with unknown concentration, whether the gas concentration acquired by the standard metering device and the actual gas concentration in the box have deviation can not be judged, the standard metering device needs other calibration devices to calibrate the gas concentration, on the contrary, the process of the calibration process is increased, and the accuracy and the convenience of the detection process are reduced.
Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the applicant has studied a great deal of literature and patents when making the present invention, but the disclosure is not limited thereto and the details and contents thereof are not listed in detail, it is by no means the present invention has these prior art features, but the present invention has all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to solve the problem of how to arrange a calibration device capable of efficiently and accurately calibrating an air sensor in real time, so that the air sensor can be efficiently and accurately calibrated in real time by means of calculation and analysis of an operation module through the technical scheme of arranging a gas storage chamber for storing standard gas and a plurality of environment sensors capable of detecting various environment parameters.
A calibration device includes a detection unit provided with an air sensor for detecting air quality, an arithmetic unit capable of receiving and processing data, and a calibration unit capable of calibrating a detection value obtained by detecting air by the air sensor.
The calibration unit is provided with a gas reservoir for storing a standard gas.
The gas communication opening that the one end of gas receiver set up can set up with air sensor in opposite directions.
The air sensor can pass through the air communication port and be movably connected with the air storage chamber in a mode of entering the interior of the air storage chamber.
The air sensor and/or the air reservoir may be movable in opposite directions in such a way that the mutual distance is shortened.
Alternatively, the movement in opposite directions may be a single movement of the air sensor towards the air reservoir or a single movement of the air reservoir towards the air sensor or both towards each other, wherein the opposite movements shorten the distance between each other and may eventually connect the air sensor with the air reservoir through the gas communication opening.
Further, the air sensor and/or the air reservoir may also be moved in opposite directions in such a way that the mutual distance increases.
When the standard gas calibration work is carried out, the gas communication opening can be opened, the air sensor penetrates through the gas communication opening to enter the air storage chamber in a mode of moving the air sensor and/or the air storage chamber, and/or the air sensor is enabled to detect the standard gas overflowing from the air storage chamber in a mode of not contacting the gas communication opening in an isolated mode.
The air sensor can be arranged on the first platform, and the air storage chamber can be arranged on the second platform.
The first platform and/or the second platform can move the air sensor and/or the air reservoir in a manner of approaching or moving away relative to each other under the driving of the motor.
When the air sensor passes through the air communication port and enters the air storage chamber, the first platform and the air communication port are correspondingly provided with a sealing mechanism which can be in sealing connection in a mutually matched mode.
The air communication port is sized to at least allow the air sensor to pass through, and the size of the sealing mechanism provided on the first stage is determined according to the size of the air communication port.
The air sensor is arranged in the circulation channel.
A plurality of environmental sensors may be disposed within the flow channel.
The plurality of environmental sensors includes at least one or more of a temperature sensor, a humidity sensor, an air pressure sensor, and a wind speed sensor.
Preferably, several environmental sensors may be integrated on the air sensor to form an air quality sensor, and the air quality sensor may simultaneously detect one or more of temperature, humidity, air pressure, wind speed, TVOC, and the like in the air.
The flow channels may be in communication with the air inlet and the air outlet, respectively.
The air inlet and the air outlet are respectively arranged on the shell of the calibration device.
The air sensor and the plurality of environment sensors can be in signal connection with the transmission module of the operation unit, and corresponding detection values can be transmitted to the calculation module through the transmission module.
The transmission module can be connected with an external transmission module of an external device in a wired and/or wireless manner.
The external device comprises at least a computing module capable of signal connection to an external transmission module.
The calculation module arranged inside the calibration device and/or inside the external equipment can be in signal connection with the storage module.
The calculation module can receive a standard gas detection value of the air sensor during standard gas calibration work, and transmits the processed standard gas detection value to the storage module for storage.
The storage module is capable of sending the standard gas detection value to the calculation module in response to the air sensor and the plurality of environmental sensors transmitting corresponding detection values to the calculation module through the transmission module.
The utility model has the advantages that:
1. the air sensor and/or the air storage chamber can enable the air sensor to penetrate through the air communicating port to enter the air storage chamber in a mode of opposite movement and detect the standard gas in the air storage chamber, the consumption of the standard gas is reduced while the standard gas detection value can be obtained by ensuring that the standard gas is hardly polluted, the replacement frequency of the air storage chamber can be reduced and/or the necessary accommodating volume of the air storage chamber is reduced, so that the cost of the calibrating device during air detection is saved;
2. the calibration unit can be provided with a plurality of environment sensors of different types to realize real-time detection of various environment influence factors including temperature, humidity, air pressure and/or wind speed and the like, so that the real-time performance and the accuracy of air detection and calibration are improved.
Drawings
FIG. 1 is a schematic diagram of the structure of a detection unit and a calibration unit of the calibration device in a preferred embodiment;
FIG. 2 is a circuit diagram of the calibration device in a preferred embodiment;
fig. 3 is a schematic diagram of signal transmission of the calibration device in another preferred embodiment.
List of reference numerals
100: the detection unit 110: air sensor
111: the first stage 120: air inlet
130: flow-through channel 140: air outlet
200: the arithmetic unit 210: computing module
220: the storage module 230: transmission module
300: the calibration unit 310: air storage chamber
311: the second stage 312: gas communication port
320: the environmental sensor 321: temperature sensor
322: the humidity sensor 323: air pressure sensor
324: the wind speed sensor 400: external device
410: external transmission module X: a first direction
Y: second direction
Detailed Description
The following detailed description is made with reference to the accompanying drawings.
The utility model discloses a calibration device which can calibrate an air sensor 110 arranged in the calibration device in real time, so that the influence of a plurality of external factors on the detection value of the air sensor 110 can be eliminated, and a compensation calibration value with smaller deviation after calibration is obtained. The calibration apparatus may include a detection unit 100 of the air sensor 110 for detecting air quality, an arithmetic unit 200 capable of receiving and processing data, and a calibration unit 300 capable of calibrating a detection value obtained by the air sensor 110 detecting air.
According to a preferred embodiment, fig. 1 is a schematic structural diagram of the detection unit 100 and the calibration unit 300 of the calibration apparatus in the preferred embodiment, and fig. 2 is a circuit connection diagram of the calibration apparatus in the preferred embodiment. The detection unit 100 may comprise an air inlet 120, a flow-through channel 130 and an air outlet 140, wherein both ends of the flow-through channel 130 communicate with the air inlet 120 and the air outlet 140, respectively, such that air can be input into the calibration device from the air inlet 120, flow through the flow-through channel 130 and output from the air outlet 140. Preferably, the air inlet 120 and the air outlet 140 are provided in different areas of the housing of the calibration device, respectively, and the flow channel 130 is provided inside the calibration device. The direction in which air enters the air inlet 120 is defined as a first direction X. Preferably, the detection unit 100 may be provided with an air feeding assembly at one end of the air inlet 120 so that air can smoothly enter the circulation channel 130 from the air inlet 120 in the first direction X. Further, the air inlet 120 and the air outlet 140 may be respectively provided with corresponding valves to control the air inlet and the air outlet.
An air sensor 110 may be disposed within the flow channel 130 to detect at least the TVOC of the air. When air detection is required, the air inlet 120 is opened to allow air to enter the flow channel 130 and contact the probe of the air sensor 110, so that the air sensor 110 acquires a detection value of the current air.
The calibration unit 300 includes a gas storage chamber 310 storing a standard gas, wherein the standard gas is a fixed component and content VOC standard gas. Preferably, the air reservoir 310 can be provided as a pressure-regulated closeable air chamber. One end of the air storage chamber 310 is provided with an air communication port 312 capable of controlling opening and closing. Preferably, the opening direction of the gas communication port 312 is provided opposite to the air sensor 110. The standard gas in the gas storage chamber 310 can be overflowed from the gas communication port 312 by adjusting the internal pressure when the gas communication port 312 is opened until the standard gas contacts the air sensor 110 arranged at a distance, so that the air sensor 110 can acquire the detection value of the standard gas, thereby completing the calibration of the standard gas. The gas reservoir 310 may be replaced when the gas reservoir 310 reaches a certain condition, such as, but not limited to, the remaining amount of the standard gas in the gas reservoir 310 being below a set threshold, the standard gas in the gas reservoir 310 being contaminated, the gas communication port 312 of the gas reservoir 310 not being opened, so that the standard gas calibration operation can be performed normally.
According to a preferred embodiment, in order to save the amount of standard gas and reduce the frequency of replacement of the air reservoir 310 during the calibration of the standard gas, the standard gas in the air reservoir 310 can be directly detected by temporarily passing the air sensor 110 through the gas communication port 312 to enter the air reservoir 310, wherein the air sensor 110 can be moved into the air reservoir 310 by moving the air sensor 110 and/or the air reservoir 310. Preferably, the air sensor 110 may be disposed at the first platform 111, and the air reservoir 310 may be disposed at the second platform 311, wherein a direction in which the disposition plane of the first platform 111 is directed to the disposition plane of the second platform 311 is defined as the second direction Y. The first stage 111 and/or the second stage 311 can be moved in the positive direction and the reverse direction of the second direction Y by the motor, wherein the air sensor 110 and the air reservoir 310 can be brought close to each other when the first stage 111 is moved in the positive direction of the second direction Y and/or the second stage 311 is moved in the negative direction of the second direction Y. Preferably, the gas communication port 312 is sized and configured to ensure that the air sensor 110 can pass through the through hole in the gas communication port 312. The first platform 111 and the gas communication port 312 may be correspondingly provided with a sealing mechanism, so that the first platform 111 can be in sealing connection with the gas communication port 312 when the air sensor 110 enters the air reservoir 310 through the gas communication port 312, wherein the size structure of the sealing mechanism may be determined according to the size structure of the gas communication port 312. Preferably, when the air sensor 110 and the air reservoir 310 move towards each other, a small portion of the standard gas can be flushed towards the surface of the air sensor 110 by opening the gas communication port 312 in advance and pressurizing the interior of the air reservoir 310 instantaneously, so as to clean the surface of the air sensor 110, thereby preventing the air sensor 110 from bringing impurities attached to the surface of the air sensor into the air reservoir 310 and polluting the standard gas. Preferably, the air communication port 312 may be designed as a double door structure, so that the air sensor 110 can move relatively in the cavity between the double doors, and the double doors can be controlled to be opened at one side, so that the air sensor 110 can complete surface cleaning in the cavity before entering the air storage chamber 310 to contact most of the standard gas, thereby further avoiding the standard gas from being polluted.
A number of environmental sensors 320 for detecting environmental interference factors may also be disposed within the flow channel 130, wherein the environmental sensors 320 may include one or more of a temperature sensor 321, a humidity sensor 322, an air pressure sensor 323, and a wind speed sensor 324, so that the environmental sensors 320 can detect the temperature, humidity, air pressure, and/or wind speed of the air. According to a preferred embodiment, several environmental sensors 320 may be integrated on the air sensor 110 to form an air quality sensor that can simultaneously detect one or more of temperature, humidity, barometric pressure, wind speed, TVOC, etc. values in the air.
According to another preferred embodiment, fig. 3 is a schematic diagram of signal transmission of the calibration apparatus in the preferred embodiment. The arithmetic unit 200 of the calibration device is capable of receiving, transmitting, calculating and/or storing the detection values acquired by the air sensor 110 and/or the environmental sensor 320, wherein the arithmetic unit 200 may include a calculation module 210, a storage module 220 and a transmission module 230. The transmission module 230 can receive the detection values collected by the air sensor 110 and/or the environmental sensor 320 and send the detection values to the calculation module 210 for calculation processing. When the detection value received by the calculation module 210 and collected by the air sensor 110 is based on the detection value of the standard gas, the detection value of the standard gas can be sent to the storage module 220 for storage. When the previously obtained standard gas detection value is stored in the storage module 220, all the standard gas detection values are returned to the calculation module 210 for error determination, so as to achieve the rejection of the standard gas detection value. When the error is within the set threshold, the latest standard gas detection value can be retained, and when the error exceeds the set threshold, the user can be reminded to replace the gas storage chamber 310. When the detection value received by the calculation module 210 and collected by the air sensor 110 is based on the detection value of the air to be measured, the calculation module 210 can retrieve the standard gas detection value from the storage module 220 for calibrating the detection value of the air to be measured, so as to obtain the compensation calibration value. The calculation function of the calculation module 210 of the present invention is the same as the prior art, for example, chinese patent CN 211043280U discloses an air quality calibration and detection system for a vehicle, which includes a calculation module for calculating the influence degree of each air parameter on the air. The utility model can adopt the same computing module, only needs to be connected to the corresponding sensor, does not aim to improve the computing function of the computing module, and does not relate to the improvement of a method or a computing program. Compared with the prior art, the air sensor and/or the air storage chamber can enable the air sensor to penetrate through the air communication port to enter the air storage chamber in a mode of opposite movement and detect the standard gas in the air storage chamber, the consumption of the standard gas is reduced while the standard gas is enabled to be hardly polluted and the detection value of the standard gas can be obtained, the replacement frequency of the air storage chamber can be reduced, and/or the necessary accommodating volume of the air storage chamber can be reduced, so that the cost of the calibrating device during air detection is saved. Furthermore, a plurality of environment sensors of different types are arranged, so that real-time detection of environment influence factors including temperature, humidity, air pressure and/or wind speed can be realized, and the real-time performance and the accuracy of air detection and calibration are improved.
According to a preferred embodiment, the transmission module 230 may further be in signal connection with the external transmission module 410 of the external device 400 in a wired and/or wireless manner, so that the detection value collected by the air sensor 110 and/or the environment sensor 320 can be transmitted to the external device 400, wherein the external device 400 at least includes the calculation module 210, and the calculation module 210 of the external device 400 can also perform operation processing on the detection value. Preferably, the external device 400 may include a storage module 220 to store the standard gas detection value, so that the external device 400 can also perform calibration of the detection value of the air sensor 110. Further, the external device 400 may further include a control module capable of outputting a control signal to transmit the control signal to the transmission module 230 through the external transmission module 410 to implement control of the calibration apparatus.
It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the utility model. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the utility model is defined by the claims and their equivalents.
Claims (10)
1. A calibration device, comprising:
a detection unit (100) provided with an air sensor (110) for detecting air quality,
an arithmetic unit (200) capable of receiving and processing data,
a calibration unit (300) capable of calibrating a detection value obtained by the air sensor (110) detecting air,
wherein the calibration unit (300) is provided with a gas reservoir (310) for storing a standard gas,
it is characterized in that the preparation method is characterized in that,
a gas communication port (312) arranged at one end of the air storage chamber (310) can be arranged opposite to the air sensor (110), the air sensor (110) can penetrate through the gas communication port (312) to be movably connected with the air storage chamber (310) in a mode of entering the interior of the air storage chamber (310), wherein,
the air sensor (110) and/or the air reservoir (310) can be moved in opposite directions in such a way that the distance between them is reduced.
2. Calibration device according to claim 1, wherein the air sensor (110) is arrangeable on a first platform (111) and the air reservoir (310) is arrangeable on a second platform (311), wherein the first platform (111) and/or the second platform (311) are/is adapted to move the air sensor (110) and/or the air reservoir (310) towards or away from each other under the drive of a motor.
3. The calibration device according to claim 2, wherein the first platform (111) and the gas communication opening (312) are provided with sealing means corresponding to the gas communication opening (312) for sealing connection in a mutually fitting manner when the air sensor (110) enters the air reservoir (310) through the gas communication opening (312).
4. A calibration device according to claim 3, wherein the gas communication port (312) is dimensioned in such a way as to at least allow the passage of the air sensor (110), the dimensioning of the sealing means provided to the first platform (111) being determined according to the dimensioning of the gas communication port (312).
5. Calibration device according to claim 4, wherein the air sensor (110) is arranged in a flow channel (130), wherein a number of environmental sensors (320) can be arranged in the flow channel (130), wherein the number of environmental sensors comprises at least one or more of a temperature sensor (321), a humidity sensor (322), an air pressure sensor (323) and a wind speed sensor (324).
6. Calibration device according to claim 5, wherein the flow-through channel (130) is connectable to a gas inlet (120) and a gas outlet (140), respectively, wherein the gas inlet (120) and the gas outlet (140) are arranged on a housing of the calibration device, respectively.
7. Calibration device according to claim 5, characterized in that said air sensor (110) and several of said environmental sensors (320) are signally connectable to a transmission module (230) of said calculation unit (200) and are able to transmit corresponding detection values to a calculation module (210) through said transmission module (230).
8. Calibration device according to claim 7, wherein the transmission module (230) is connectable in a wired and/or wireless manner with an external transmission module (410) of an external device (400), wherein the external device (400) comprises at least the calculation module (210) which is signally connectable to the external transmission module.
9. The calibration device according to claim 8, wherein the computing module (210) disposed inside the calibration device and/or inside the external device (400) is capable of being signal-connected to a storage module (220), and the computing module (210) is capable of receiving a standard gas detection value of the air sensor (110) during a standard gas calibration operation and transmitting the processed standard gas detection value to the storage module (220) for storage.
10. The calibration device of claim 9, wherein the storage module (220) is configured to send the standard gas detection value to the calculation module (210) in response to the air sensor (110) and a number of the environmental sensors (320) transmitting corresponding detection values to the calculation module (210) via the transmission module (230).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121483799 | 2021-06-30 | ||
| CN2021214837996 | 2021-06-30 | ||
| CN2021222033811 | 2021-09-10 | ||
| CN202122203381 | 2021-09-10 |
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| CN216484846U true CN216484846U (en) | 2022-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115728445A (en) * | 2022-10-15 | 2023-03-03 | 北京中立格林传感科技股份有限公司 | Sensor calibration method, device, equipment and computer readable storage medium |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115728445A (en) * | 2022-10-15 | 2023-03-03 | 北京中立格林传感科技股份有限公司 | Sensor calibration method, device, equipment and computer readable storage medium |
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