A detection and calibration device based on a calibration system

Abstract

The present invention relates to a detection and calibration device based on a calibration system, the detection and calibration device comprising a sensor unit (210) for performing gas detection and a gas storage chamber (220) for storing standard gas. When a central control unit (340) drives a mechanical unit (100) and a detection and calibration unit (200) to perform standard gas detection, the driving unit (120) drives a first shell (111) in a main unit (110) of the mechanical unit (100) to move along a second direction (2), so that the gas storage chamber (220) provided on the first shell (111) can dock with the sensor unit (210), thereby completing standard gas detection. The gas storage chamber moves toward the direction close to the sensor unit, at which time the internal space of the main unit decreases and the air pressure increases, so that the internal gas overflows from the shell opening to the external space of the main unit. When the standard gas overflows, it can generate an instantaneous high-speed airflow to rush toward the surface of the sensor probe, so as to achieve the purpose of cleaning the surface of the sensor probe.

Description

[0001] This invention is a divisional application of an invention patent with application number 202110743084.8, application date June 30, 2021, application name A calibration method and system for detecting gas, and application type is invention. Technical Field

[0002] The present invention relates to the technical field of detection equipment calibration, and in particular to a detection and calibration device based on a calibration system. Background Art

[0003] Urbanization and industrialization have led to air pollution in urban development. To purify the air and improve air quality, air treatment equipment is widely used in homes, offices, and cars. Air treatment equipment typically also includes an air sensor and a processor. The air sensor measures air quality and provides a measurement output. The processor then reads the air sensor's measurement output and controls an air quality indicator based on the air sensor's measurement output to provide a user with an indication of air quality. However, the air sensor's measurement output may drift over time, and even within the same batch, the air sensor itself may show inconsistencies between measurements, potentially resulting in an air quality indicator giving the user an erroneous indication. Therefore, it is necessary to provide a calibration device to calibrate the air sensor.

[0004] One embodiment of CN103328968 B provides an air treatment device. The air treatment device includes: an air purification unit configured to purify air; an air sensor configured to measure a first air volume and provide a measurement output, wherein the first air volume 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 to calibrate the air sensor. Utilizing the air treatment device of one embodiment of the invention, clean air (i.e., zero-grade air) is generated locally by the air treatment device to calibrate the air sensor, without the need to generate zero-grade air externally, which brings convenience to the user or other operators who perform calibration of the air sensor of the air treatment device. Another embodiment of the invention also provides a method for calibrating the air sensor of the air treatment device. The method includes the steps of: purifying air by using the air treatment device; and obtaining a first value by measuring the first air volume by using the air sensor to calibrate the air sensor. However, the standard gas used in the calibration device of this patent is zero-grade air that has been purified by its own purification unit. Zero-grade air has a certain deviation compared to the standard gas and cannot accurately calibrate the test results. On the contrary, the drift of the air sensor will cause the calibration results to deviate more and more from the actual results.

[0005] CN107402287 B discloses a calibration device for an air quality detector, comprising a housing, a standard metering device, a data processing module, and a gas charging device; the housing is a sealable housing provided with a gas input port to be tested; the standard metering device is disposed inside the housing and is used to detect the standard concentration of the gas inside the housing; the gas charging device is connected to the housing via the gas input port to be tested and is used to inject the gas to be tested into the housing; the data processing module is connected to the standard metering device and the air quality detector, respectively, and is used to receive and process real-time data detected by the standard metering device and the air quality detector and calibrate the air quality detector based on the real-time data. This invention achieves simultaneous calibration of multiple air quality detectors by placing the air quality detectors in a test housing and connecting them to the data processing module, and then comparing the data with the data measured by the standard metering device. However, the calibration device of this 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 of unknown concentration. It is impossible to determine whether there is a deviation between the gas concentration collected by the standard metering device and the actual gas concentration in the box. The standard metering device also requires other calibration devices to calibrate it, which increases the number of steps in the calibration process and reduces the accuracy and convenience of the detection process.

[0006] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a calibration method and system for detecting gas.

[0008] The present invention discloses a calibration system for detecting gas, which includes a mechanical part and a detection and calibration part. The mechanical part includes a main body unit, and the detection and calibration part includes a sensor unit and a gas storage chamber. The main body unit includes a first shell and a second shell capable of relative movement, and the first shell and the second shell can be interchangeably connected to the gas storage chamber and the sensor unit respectively. When the calibration system is working, the gas to be measured is passively contacted with the sensor unit in the main body unit through the mechanical action of the main body unit, and the standard gas used for calibration is also passively contacted with the sensor unit in the main body unit through the mechanical action of the main body unit. The first shell can make the gas to be measured contact with the sensor unit in a manner that expands the internal space of the main body unit when it moves in a natural state along a first direction. The first shell can make the standard gas contact with the sensor unit in a manner that reduces the distance between the gas storage chamber and the sensor unit when it moves in a natural state along a second direction.

[0009] The advantage of this technical solution is that the main unit of the calibration system is divided into at least a first shell and a second shell that can move relative to each other, so that different detection and calibration requirements can be met by shifting one shell to different degrees and / or in different directions. The first shell and the second shell can be interchangeably connected to the gas storage chamber and the sensor unit, that is, one of the gas storage chamber and the sensor unit is located on the first shell and the other is located on the second shell, and the two are arranged interchangeably. Preferably, the gas storage chamber is located on the first shell and the sensor unit is located on the second shell to prevent the sensor unit from vibrating with the movement of the first shell due to its location on the first shell, thereby affecting the service life and detection accuracy of the sensor unit. At the same time, the placement of the gas storage chamber on the first shell also facilitates the quick replenishment or replacement of the standard gas in the gas storage chamber when it becomes contaminated and / or insufficient. When the first shell is not moving relative to the second shell, it is in a natural state and can move relative to the second shell in at least a first direction or a second direction, so that the process of the first shell moving from the natural state in the first direction and returning is the process of detecting the gas to be tested, and the process of the first shell moving from the natural state in the second direction and returning is the process of detecting the standard gas. During the test gas detection process, when the first shell moves in the first direction, the internal space of the main unit increases so that the test gas can be sucked into the internal space of the main unit and contact the sensor unit to detect the test gas. During the standard gas detection process, when the first shell moves in the second direction, the internal space of the main unit decreases so that the internal gas can be discharged from the internal space of the main unit. At the same time, the gas storage chamber and the sensor unit respectively provided on the first shell and the second shell are close to each other, so that the sensor unit can detect the standard gas in the gas storage chamber.

[0010] The first shell and / or the second shell can be provided with at least one shell opening so as to introduce external gas into the internal space of the main unit or lead internal gas out from the internal space of the main unit through the shell opening when the first shell moves along the first direction or the second direction.

[0011] The advantage of this technical solution is that the first shell can move relative to the second shell in the first direction or the second direction, so that the internal space of the main unit formed by the first shell and the second shell can increase or decrease accordingly, and the gas pressure in the internal space of the main unit can decrease or increase accordingly, thereby causing a pressure difference between the internal and external air pressures of the main unit to introduce external gas into the internal space of the main unit or to lead internal gas out of the internal space of the main unit through the shell opening. Preferably, the shell opening is opened on the second shell, and one or two shell openings can be opened on the second shell, wherein, when the second shell is opened with two shell openings, one shell opening serves as a gas inlet and the other shell opening serves as a gas outlet, so that the airflow in the internal space of the main unit is unidirectional, thereby avoiding the collision between the inlet and outlet airflows to ensure continuous intake and exhaust.

[0012] The gas storage chamber has a gas storage opening on a side opposite the sensor unit. The structural dimensions of the gas storage opening match the detection area of the sensor unit with the sensor probe. The detection area of the sensor unit can pass through the gas storage opening and enter the interior space of the gas storage chamber. Under the control of the control unit, the gas storage opening can remain open for at least the period from when the detection area enters the gas storage chamber to when it leaves the gas storage chamber.

[0013] The advantages of this technical solution are that the gas storage opening of the gas storage chamber matches the structure of the detection area of the sensor unit, so that when one of the gas storage chamber and the sensor unit is installed on the first shell, it can move along the second direction with the first shell from its natural state to approach the other. The gas storage chamber and the sensor unit can be detachably connected in such a way that the gas storage opening and the detection area are connected, so that the detection area of the detection unit can enter the internal space of the gas storage chamber to complete the detection of the standard gas. Preferably, a sealing assembly can be provided along the circumference at the connection between the gas storage opening and the detection area to ensure a sealed connection. At the same time, when the first shell moves from its natural state in the second direction, the internal space of the main unit decreases and the air pressure increases, thereby allowing the internal gas to overflow from the shell opening, thereby preventing the internal gas of the gas storage chamber from contaminating the standard gas in the gas storage chamber when the gas storage opening is opened. Furthermore, since the relative positional relationship between the gas storage chamber and the sensor unit is associated with the relative positional relationship between the first shell and the second shell of the main unit, the control unit can adjust the opening time of the gas storage opening of the gas storage chamber according to the movement of the first shell, so as to avoid the gas storage opening and the detection area from colliding and impacting due to a too short opening time, or to avoid the residual internal gas from contaminating the standard gas due to a too long opening time. Preferably, a monitoring component capable of monitoring whether the detection area is entered or exited can also be provided at the gas storage opening position to achieve coordinated adjustment of the control unit. Furthermore, the gas storage opening is opened before the detection area enters the gas storage opening, so that a small amount of standard gas can overflow from the gas storage opening to the surface of the detection area due to the internal and external pressure difference, so that the overflowed standard gas can clean the detection area, especially the surface of the sensor probe, thereby improving the sensitivity of the sensor probe while preventing impurities such as tiny particles attached to the detection area from entering the gas storage chamber and contaminating the standard gas. At the same time, during each standard gas test, the detection area enters the gas storage chamber for testing, ensuring that only a small amount of standard gas escapes from the gas storage opening. Compared to conventional standard gas testing, this significantly reduces standard gas consumption while ensuring that the standard gas is not contaminated, extending the life of the gas storage chamber and avoiding frequent replenishment or replacement. In addition, the gas storage opening can be equipped with a double-door structure to further prevent contamination of the standard gas.

[0014] The control unit can control the movement of the drive unit. The drive unit can be connected to the first shell and the second shell and drive the first shell to move in the first direction or the second direction. The control unit can adjust the opening and closing of the gas storage opening based on the movement of the drive unit. The shell opening can be provided with an opening valve, and the control unit can adjust the opening and closing of the opening valve based on the movement of the drive unit.

[0015] The advantages of this technical solution are that the drive unit can drive the first shell to move relative to the second shell in a first direction or a second direction, so that the position and movement direction of the first shell can be controlled by adjusting the drive unit by the control unit, thereby driving the first shell to move to a predetermined position along different movement directions according to different detection and calibration requirements. The control unit can be simultaneously connected to the drive unit, the gas storage opening, and the opening valve, so that the control unit can determine the current position of the first shell and its relative positional relationship with the second shell based on the adjustment parameters of the drive unit, thereby deriving the relative positional relationship between the gas storage opening and the detection area to determine whether to adjust the opening and closing state of the gas storage opening. At the same time, the control unit can also derive the changing trend of the internal space of the main unit to determine whether to open the opening valves corresponding to the different shell openings. Furthermore, the control unit can also be connected to the sensor unit so that the sensor unit is turned on when it is needed for detection, thereby reducing the operating time of the sensor unit and preventing the sensor unit from being in the open state for a long time, which affects its service life.

[0016] The sensor unit includes an air quality sensor and an environmental sensor. Optionally, the environmental sensor includes one or a combination of a temperature sensor, a humidity sensor, an air pressure sensor, and a wind speed sensor. Preferably, the environmental sensor can be configured with all four of the aforementioned sensors. The sensor unit is capable of transmitting detection data to the computing unit for data processing. The computing unit is capable of calibrating the detection results obtained after data processing based on the standard values detected by the standard gas and / or the detection values of environmental factors collected by the multiple environmental sensors.

[0017] The calculation unit can calibrate and fit the test results according to the following formula:

[0018]

[0019] Where Y is the compensation calibration value, α is the span calibration coefficient, k1, k2, and k3 are the weights of each item, T is the actual ambient temperature, T0 is the standard value of the sensor temperature, P is the actual atmospheric pressure, P0 is the standard value of the sensor pressure, R is the actual humidity, V is the actual wind speed, x is the actual detection value, and x0 is the standard value of the gas in the gas storage chamber.

[0020] The advantages of this technical solution are that the sensor unit obtains the VOC value of the gas to be tested by setting an air quality sensor, and obtains the detection values of different influencing factors in the environment where the gas to be tested is located by setting an environmental sensor. Preferably, the environmental sensor is provided with a temperature sensor, a humidity sensor, an air pressure sensor, and a wind speed sensor to collect temperature detection values, humidity detection values, air pressure detection values, and wind speed detection values. The detection value of the gas to be tested obtained by the air quality sensor is sent to the computing unit for data processing to obtain the detection result. The detection result can be calibrated with the help of the standard value of the standard gas detection and the actual detection value of the environment with reference to the pre-installed calibration fitting formula to obtain a more accurate detection result after calibration.

[0021] The present invention also discloses a calibration method for detecting gas. The calibration method adopts any of the aforementioned calibration systems and can complete the following steps through a central control unit:

[0022] S1. The central control unit is capable of driving the mechanical part and the detection and calibration part to perform standard gas detection, wherein the driving unit drives the first housing to move in the second direction so that the gas storage chamber provided on the first housing can dock with the sensor unit, thereby completing the standard gas detection;

[0023] S2. The central control unit is capable of driving the mechanical unit and the detection and calibration unit to detect the gas to be tested, wherein the driving unit drives the first housing to move in a first direction to increase the internal space of the main unit, thereby drawing the gas to be tested from the external space of the main unit into the internal space of the main unit and contacting the gas to be tested into the sensor unit to complete the detection of the gas to be tested and / or environmental influencing factors;

[0024] S3. The central control unit can drive the computing unit that receives the detection data to process the data, and complete the calibration of the detection results based on the standard value of the standard gas detection and the detection value of the environmental influencing factors.

[0025] Preferably, the following steps may be performed before step S1:

[0026] S0: Turn on the energy unit so that it can supply power to the electrical equipment in the calibration system, and connect the user terminal to the communication unit.

[0027] Furthermore, if the calibration system is not provided with a computing unit in step S3, this step is skipped, and the detection data is sent to the user terminal via the communication unit for data processing by the computing unit of the user terminal.

[0028] Preferably, the following steps may be performed after performing step S3 or skipping step S3:

[0029] S4. The central control unit may drive the communication unit to send the detection data and / or detection results to the user terminal and / or drive the display unit to display the detection data and / or detection results on the screen according to the control signal input by the operation unit and / or the communication unit and / or the preset program;

[0030] S5. Disconnect the user terminal from the communication unit and turn off the energy unit.

[0031] The advantage of this technical solution is that the calibration method adopts the above-mentioned calibration system to complete different detection calibration tasks by moving the first shell to different degrees and in different directions. When the first shell is not driven by the driving unit, it does not move relative to the second shell, that is, it is in a natural state, and at least can move relative to the second shell in the first direction or the second direction under the drive of the driving unit, so that the process of the first shell moving from the natural state along the first direction and returning is the gas detection process to be tested, and the process of the first shell moving from the natural state along the second direction and returning is the standard gas detection process. The detection data obtained from different detection processes can be transmitted to the operation unit for data processing. Optionally, the operation unit may not be provided in the calibration system, so that the detection data is transmitted to the user terminal through the communication unit and the operation unit on the user terminal performs data processing to obtain the detection result. The detection result can be calibrated according to the calibration fitting formula preset by the operation unit to obtain a more accurate detection result after calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a gas detection calibration system in a preferred embodiment;

[0033] Figure 2 A circuit connection diagram of a gas detection calibration system in a preferred embodiment;

[0034] Figure 3 A schematic flow chart of a gas detection calibration method in a preferred embodiment.

[0035] Reference Signs List

[0036] 1: First Direction 100: Mechanical Department

[0037] 110: Main body unit 111: First housing

[0038] 112: Second housing 113: Housing opening

[0039] 114: Opening valve 120: Drive unit

[0040] 130: Control unit 2: Second direction

[0041] 200: Detection and calibration unit 210: Sensor unit

[0042] 211: Air quality sensor 212: Temperature sensor

[0043] 213: Humidity sensor 214: Air pressure sensor

[0044] 215: Wind speed sensor 220: Air storage chamber

[0045] 221: Gas storage opening 300: Functional part

[0046] 301: Isolation room 310: Display unit

[0047] 320: Operation unit 330: Communication unit

[0048] 340: Central control unit 350: Computing unit

[0049] 360: Energy Unit DETAILED DESCRIPTION

[0050] The following is a detailed description with reference to the accompanying drawings.

[0051] The present invention discloses a gas detection calibration system, which includes a mechanical part 100, a detection and calibration part 200 and a functional part 300, wherein the mechanical part 100 includes a main unit 110 capable of carrying and / or accommodating the detection and calibration part 200 and the functional part 300. Figure 1 FIG. 1 is a schematic diagram of the structure of a gas detection calibration system in a preferred embodiment. Figure 2 Shown is a circuit connection diagram of a calibration system for detecting gas in a preferred embodiment.

[0052] According to a preferred embodiment, the main unit 110 of the mechanical part 100 may include a first shell 111 and a second shell 112. The first shell 111 and the second shell 112 can constitute a relatively sealed internal space of the main unit 110, wherein the first shell 111 and the second shell 112 can be relatively displaced to make the size of the internal space of the main unit 110 adjustable. Furthermore, the first shell 111 is relatively movable, and the second shell 112 is relatively fixed. A drive unit 120 is connected between the first shell 111 and the second shell 112 so that the drive unit 120 can drive the first shell 111 to move along the driving direction of the drive unit 120. The drive unit 120 can be any electromechanical component such as an actuator that can cause the first shell 111 to move. The drive unit 120 can move in a first direction 1 to drive the first housing 111 to move synchronously in the first direction 1, thereby increasing the distance between the first housing 111 and the second housing 112, thereby increasing the internal space of the main unit 110. The drive unit 120 can also move in a second direction 2 to drive the first housing 111 to move synchronously in the second direction 2, thereby decreasing the distance between the first housing 111 and the second housing 112, thereby decreasing the internal space of the main unit 110. Furthermore, a resilient reset unit can be provided between the first housing 111 and the second housing 112, in the same direction as the drive unit 120. This allows the first housing 111 to compress or stretch the reset unit when it moves in the first direction 1 or the second direction 2 driven by the drive unit 120, thereby causing the reset unit to elastically deform. After the drive unit 120 removes the driving force, the first housing 111 is reset by means of the resilient force of the reset unit. This saves power consumption of the drive unit 120 while allowing the recovery unit to recover energy generated by the movement of the second housing 112 during the reset period. Preferably, the second shell 112 can be made of a rigid material, and the first shell 111 can be made of a flexible material or a rigid material according to different usage scenarios, wherein the rigid material can be a metal plate, a plastic plate or a glass plate, etc. When the first shell 111 and the second shell 112 are both made of rigid materials, the area between the first shell 111 and the second shell 112 where a gap may appear as the first shell 111 moves is connected by a sealing component including but not limited to a folding tube or a rubber seal to ensure the relative sealing of the internal space of the main unit 110.

[0053] According to a preferred embodiment, a shell opening 113 may be provided on at least one side of the main unit 110, wherein the shell opening 113 may be provided on the first shell 111 and / or the second shell 112. Optionally, the structural dimensions of the shell opening 113 may be determined according to the installation location and detection requirements, wherein the shell opening 113 may be circular, rectangular, or in other structural shapes. Preferably, the shell opening 113 is provided on the first shell 111, and the shell opening 113 may be provided with an opening valve 114 to control the opening and closing and the degree of opening of the shell opening 113 through the opening valve 114. According to the detection requirements, a filter assembly may be connected to one end of the shell opening 113 to prevent substances that are not desired to invade the internal space of the main unit 110, especially particles exceeding a predetermined size, from entering the internal space of the main unit 110 through the filter assembly. When only one shell opening 113 is set, when the first shell 111 moves along the first direction 1 driven by the driving unit 120, the internal space of the main unit 110 increases and its air pressure decreases. When the ambient air pressure of the external space of the main unit 110 is higher than the air pressure of the internal space of the main unit 110, the external gas can enter the internal space of the main unit 110 through the shell opening 113 in the open state; when the first shell 111 moves along the second direction 2 driven by the driving unit 120, the internal space of the main unit 110 decreases and its air pressure increases. When the ambient air pressure of the external space of the main unit 110 is lower than the air pressure of the internal space of the main unit 110, the internal gas can flow to the external space of the main unit 110 through the shell opening 113 in the open state. When at least two housing openings 113 are provided, one of the housing openings 113 can be used as a gas inlet, and the other housing opening 113 can be used as a gas outlet. The other housing openings 113 can be flexibly changed according to detection requirements. Specifically, when the first housing 111 moves along the first direction 1 driven by the driving unit 120, the gas inlet can be opened and the gas outlet can be closed, the internal space of the main unit 110 increases and the air pressure thereof decreases. When the ambient air pressure outside the main unit 110 is higher than the air pressure inside the main unit 110, external air can enter the internal space of the main unit 110 through the open gas inlet. When the first shell 111 moves along the second direction 2 driven by the driving unit 120, the gas outlet can be opened and the gas inlet can be closed, the internal space of the main unit 110 is reduced and its air pressure is increased. When the ambient air pressure of the external space of the main unit 110 is lower than the air pressure of the internal space of the main unit 110, the internal gas can flow to the external space of the main unit 110 through the open gas outlet, so that the gas is in a unidirectional flow state in the internal space of the main unit 110, so that the gas can better flow into / out of the main unit 110, thereby avoiding the situation where the gas inlet and outlet are congested due to the setting of a single shell opening 113.

[0054] According to a preferred embodiment, a detection and calibration unit 200 is provided in the internal space of the main unit 110, wherein the detection and calibration unit 200 may include a sensor unit 210 for performing gas detection and a gas storage chamber 220 for storing standard gas. The sensor unit 210 includes at least an air quality sensor 211 for detecting the VOC value in the gas. When the first shell 111 moves along the first direction 1 driven by the driving unit 120, external gas is sucked into the internal space of the main unit 110 from the shell opening 113 and contacts the sensor probe of the sensor unit 210 to complete gas detection; when the first shell 111 moves along the second direction 2 driven by the driving unit 120, the internal gas is discharged from the shell opening 113 to the external space of the main unit 110 and the gas detection is stopped. Preferably, the sensor unit 210 may be connected to a control unit 130, which can be connected to the drive unit 120 to control the movement direction of the drive unit 120. The control unit 130 can also control the opening and closing of the sensor unit 210 according to the movement state of the drive unit 120, so that the sensor unit 210 can be opened only during the detection process and other times when it is manually opened, thereby avoiding the long-term opening of the sensor unit 210 to cause useless power consumption and loss of the sensor unit 210. Furthermore, the sensor unit 210 may also include a number of environmental sensors, such as a temperature sensor 212, a humidity sensor 213, an air pressure sensor 214 and / or a wind speed sensor 215. Different environmental sensors can monitor the environment in which the gas to be tested is located, so that the influence of environmental factors can be eliminated when calculating the test results, thereby achieving calibration of the test results.

[0055] According to a preferred embodiment, the standard gas stored in the gas storage chamber 220 can be used to calibrate the air quality sensor 211. A gas storage opening 221 is provided on one side of the gas storage chamber 220, connecting the interior of the gas storage chamber 220 with the interior of the main unit 110. The sensor unit 210 and the gas storage chamber 220 can be installed so that the sensor probe and the opening of the gas storage chamber 220 face each other, allowing the sensor probe to face the opening of the gas storage chamber 220. When the gas storage chamber 220 opens the gas storage opening 221, the standard gas stored in the gas storage chamber 220 can overflow from the gas storage opening 221 and contact the sensor probe, thereby completing the standard gas detection. Preferably, one of the sensor unit 210 and the gas storage chamber 220 can be mounted on the first housing 111, while the other can be mounted on the second housing 112, so that when the first housing 111 moves with the drive unit 120, it can drive the gas storage chamber 220 or the sensor unit 210 to move synchronously. Furthermore, in order to avoid the sensor unit 210 being frequently vibrated as the first shell 111 moves back and forth when the sensor unit 210 is set on the first shell 111, causing internal parts of the sensor unit 210 to slip or fall off, thereby affecting the detection effect and / or service life, the gas storage chamber 220 can be set on the first shell 111, and the sensor unit 210 can be set on the second shell 112. While protecting the sensor unit 210, it is also convenient to replenish or replace the gas in the gas storage chamber 220 when the standard gas in the gas storage chamber 220 is consumed to a threshold value. The gas storage chamber 220 arranged on the first shell 111 can move along the second direction 2 as the first shell 111 is driven by the driving unit 120, that is, the gas storage chamber 220 moves toward the direction close to the sensor unit 210. At this time, the internal space of the main unit 110 is reduced and the air pressure increases, so that the internal gas overflows from the shell opening 113 to the external space of the main unit 110, and then the gas storage opening 221 is opened to connect the internal and external spaces of the gas storage chamber 220. The standard gas stored in the gas storage chamber 220 can flow to the internal space of the main unit 110 through the gas storage opening 221 and contact the sensor probe of the sensor unit 210. At the same time, the suddenly opened gas storage opening 221 can enable the standard gas to generate an instantaneous high-speed airflow to rush towards the surface of the sensor probe when it overflows, so as to achieve the purpose of cleaning the surface of the sensor probe, thereby avoiding tiny particles adhering to the surface of the sensor probe to affect the detection accuracy, and at the same time, it can also protect the standard gas in the gas storage chamber 220 from being contaminated. At the same time, each time a standard gas test is performed, the detection area can enter the gas storage chamber 220 for detection so that only a small amount of standard gas overflows from the gas storage opening 221. Compared with conventional standard gas detection, the consumption of standard gas can be greatly reduced while ensuring that the standard gas is not contaminated, thereby extending the service life of the gas storage chamber 220 to avoid frequent replenishment or replacement of the gas storage chamber.The control unit 130 can adjust the optimal opening and closing time of the gas storage opening 221 to control the amount of standard gas that escapes. The control unit 130 first determines the relative positional relationship between the gas storage opening 221 and the detection area based on the motion of the first housing 111 driven by the drive unit 120. This determines the basic opening and closing time for the gas storage opening 221, ensuring that the gas storage opening 221 is open when the detection area is within the gas storage opening 221 and that the detection area can properly enter and exit the gas storage opening 221. Furthermore, based on the basic opening and closing time, the control unit 130 can appropriately extend the basic opening and closing time to the optimal opening and closing time based on factors such as the internal and external pressure differential of the gas storage chamber 220 and the remaining standard gas level. This allows a sufficient, but not excessive, amount of standard gas to escape from the gas storage opening 221 to clean the detection area. Preferably, the gas storage opening 221 can be configured as a tapered opening to increase the pressure of the standard gas as it escapes from the gas storage opening 221, thereby improving the cleaning effect. Furthermore, a turntable carrying the sensor unit 210 can be provided on the second shell 112, and the turntable can be driven under the control of the control unit 130, so that the control unit 130 can synchronously start the turntable when opening the gas storage opening 221 to drive the sensor unit 210 to rotate slightly, so that the standard gas sprayed on the surface of the detection area can purge impurities attached to the detection area, especially the surface of the sensor probe, and throw out the impurities under the action of centrifugal force. At the same time, the rotation of the sensor unit 210 also facilitates the docking of the detection area and the gas storage opening 221, wherein the turntable can also be provided with a storage tank for collecting impurities. Preferably, the sensor unit 210 includes at least a portion of the area containing the sensor probe as a detection area. A snap-fit assembly is provided along the outer edge of the detection area. The snap-fit assembly is structurally compatible with the gas storage opening 221, enabling the sensor unit 210 to removably connect to the gas storage chamber 220 when the gas storage chamber 220 moves in the second direction 2 to a second maximum deflection. This allows the sensor unit 210's detection area to enter the interior of the gas storage chamber 220 and detect the standard gas within the gas storage chamber 220 to obtain a standard value for the standard gas. Alternatively, the gas storage opening 221 may be designed as a circular, rectangular, or other shape, but its dimensions need to be adjusted accordingly to those of the snap-fit assembly. Preferably, the gas storage opening 221 is circular, and a sealing ring may be provided along the circumference of the gas storage opening 221 and / or the snap-fit assembly to ensure a sealed connection between the gas storage chamber 220 and the sensor unit 210 when docked. Furthermore, the gas storage opening 221 can be designed as a double-layer opening, and the double-layer opening gas storage chamber 220 can independently control the opening and closing of the two openings to protect the standard gas in the gas storage chamber 220 from being contaminated as much as possible.

[0056] According to a preferred embodiment, the first shell 111 is capable of moving between a first maximum offset and a second maximum offset, and the first shell 111 is located between the first maximum offset and the second maximum offset when in a natural state, so that the first shell 111 can move between the first maximum offset and the second maximum offset along the first direction 1 or the second direction 2 under the drive of the drive unit 120. When the first shell 111 moves from the natural state along the first direction 1 to the first maximum offset, the gas storage chamber 220 gradually moves away from the sensor unit 210, the internal space of the main unit 110 gradually increases, and more external gas is gradually sucked into the internal space of the main unit 110 and contacts the sensor unit 210 for detection. If a gas inlet and a gas outlet are provided at the same time, the opening valve 114 of the gas inlet is opened and the opening valve 114 of the gas outlet is closed; when the first shell 111 has reached the first maximum offset, the drive unit 120 and / or the reset unit can drive the first shell 111 to move along the second direction 2 to reduce the displacement of the main unit. The internal space of the element 110 is opened and the internal gas is discharged from the shell opening 113. If a gas inlet and a gas outlet are provided at the same time, the opening valve 114 of the gas outlet is opened and the opening valve 114 of the gas inlet is closed. During this process, the sensor unit 210 can detect or not detect according to actual needs. Preferably, the sensor unit 210 is switched to a closed state during the process of the first shell 111 moving to a natural state with a first maximum offset, so as to reduce the opening time of the sensor unit 210 when no effective gas can be detected, thereby saving power consumption, extending the service life of the sensor unit 210 and improving the detection efficiency of a single detection. When the first shell 111 moves from the natural state along the second direction 2 to the second maximum offset, the gas storage chamber 220 gradually approaches the sensor unit 210, the internal space of the main unit 110 gradually decreases, and more internal gas is gradually discharged from the internal space of the main unit 110. The gas storage opening 221 of the gas storage chamber 220 is opened and the sensor probe of the sensor unit 210 can be cleaned; when the first shell 111 has reached the second maximum offset, the gas storage chamber 220 is docked with the sensor unit 210 so that the detection area of the sensor unit 210 can enter the internal space of the gas storage chamber 220 and detect the standard gas in the gas storage chamber 220; when the sensor unit 210 completes the detection of the standard gas, the first shell 111 moves from the second maximum offset along the first direction 1 to the natural state under the drive unit 120 and / or the reset unit, and the gas storage opening 221 is closed after the detection area of the sensor unit 210 is completely moved out of the gas storage chamber 220. Furthermore, during the round trip process of testing the standard gas, if a gas inlet and a gas outlet are provided at the same time, the opening valve 114 of the gas outlet can be opened and the opening valve 114 of the gas inlet can be closed throughout the whole process.

[0057] According to a preferred embodiment, the main unit 110 also carries and / or accommodates a functional unit 300, wherein the functional unit 300 may include one or more of a display unit 310, an operating unit 320, a communication unit 330, a central control unit 340, a computing unit 350, and an energy unit 360. Preferably, the functional unit 300 is located in an isolated chamber 301 independently provided in the internal space of the main unit 110 to prevent the presence of certain specific substances in the gas to be tested from affecting the various components of the functional unit 300. The display unit 310 capable of displaying test data and / or test results may be any display, such as an OLED display, a TFT display, or an LCD display. The operating unit 320 may be a component capable of inputting user operating instructions in any manner, such as a keyboard, a button, a touch screen, or a microphone. The communication unit 330 is at least capable of exchanging information with the user terminal in a wired and / or wireless manner, so that the detection data and / or detection results can be transmitted to the user terminal for the user to view, analyze, etc., and the user can also input operation instructions to the calibration system through the user terminal, wherein the communication unit 330 is preferably wireless communication, for example, GSM, UMTS, LTE, WLAN, Bluetooth, Zigbee, infrared or similar technology. The central control unit 340 can regulate each functional unit in the functional unit 300 according to the user's preset program and / or the operation instructions input by the user in real time, and can also transmit control instructions to the mechanical part 100 and the detection and calibration part 200 so that the calibration system can operate normally. The operation unit 350 can receive the detection data obtained from the sensor unit 210 and calculate the detection result according to a preset formula. At the same time, the detection result can be calibrated according to the standard value of the standard gas and environmental influencing factors, so as to obtain a more accurate compensation calibration value. The energy unit 360 is used to provide energy for various electrical devices in the calibration system, wherein the energy unit 360 can be any type of battery that can provide electrical energy.

[0058] According to a preferred embodiment, the calculation unit 350 may be inserted into the following formula to achieve calibration of the detection result:

[0059]

[0060] Where Y is the compensation calibration value, α is the span calibration coefficient, k1, k2, and k3 are weights for each item, T is the actual ambient temperature, T0 is the sensor temperature standard value, P is the actual atmospheric pressure, P0 is the sensor pressure standard value, R is the actual humidity, V is the actual wind speed, x is the actual detection value, and x0 is the standard value of the gas in the air storage chamber 220. Furthermore, when the air quality sensor 211 is used to detect the VOC value in the air, x is the actual VOC detection value, and x0 is the standard value of the VOC gas in the air storage chamber 220. The temperature sensor 212, humidity sensor 213, pressure sensor 214, and wind speed sensor 215 can respectively detect the actual temperature, humidity, air pressure, and wind speed. The air quality sensor 211 can measure the standard value of the VOC gas in the air storage chamber 220 through the air storage chamber 220, thereby obtaining the various influencing parameters used to calibrate the actual VOC detection value, thereby completing the fitting calibration.

[0061] According to a preferred embodiment, the calibration device can also be manually calibrated by connecting a standard gas pump directly to the housing opening 113, closing the gas inlet and opening the gas outlet, so that standard gas can be directly supplied to the sensor unit 210 via the standard gas pump. This prevents the standard gas stored in the gas storage chamber 220 from being contaminated or the gas pressure from falling below a preset threshold from being unable to perform standard gas detection. Furthermore, if the standard gas in the gas storage chamber 220 becomes contaminated or the gas pressure falls below a preset threshold, the gas in the gas storage chamber 220 can be replenished and / or replaced.

[0062] The present invention also discloses a calibration method for detecting gas, wherein the calibration method uses any of the above calibration systems to achieve calibration during the gas detection process. Figure 3 A flow chart of a gas detection calibration method in a preferred embodiment is shown, which includes the following steps:

[0063] S0. Turn on the energy unit 360 so that it can supply power to the electrical devices in the calibration system, and connect the user terminal to the communication unit 330.

[0064] S1. The central control unit 340 can drive the mechanical part 100 and the detection and calibration part 200 to perform standard gas detection according to the control signal and / or preset program input by the operation unit 320 and / or the communication unit 330, wherein the first shell 111 is driven by the driving unit 120 to move along the second direction 2 so that the gas storage chamber 220 provided on the first shell 111 is docked with the sensor unit 210, so that the detection area detects the standard gas in the internal space of the gas storage chamber 220. After the detection is completed, the first shell 111 returns to the natural state;

[0065] S2. The central control unit 340 can drive the mechanical part 100 and the detection and calibration part 200 to detect the gas to be tested according to the control signal and / or preset program input by the operation unit 320 and / or the communication unit 330, wherein the first shell 111 is driven by the driving unit 120 to move along the first direction 1 so that the internal space of the main unit 110 is expanded, thereby sucking the gas to be tested in the external space of the main unit 110 into the internal space of the main unit 110 and contacting the sensor unit 210 to complete the detection of the gas to be tested and / or environmental influencing factors. After the detection is completed, the first shell 111 returns to the natural state;

[0066] S3. The central control unit 340 may drive the calculation unit 350 that has received the detection data to process the data according to the control signal input by the operation unit 320 and / or the communication unit 330 and / or the preset program, and calibrate the detection results according to the standard value of the standard gas detection and the detection value of the environmental influencing factor. If the calculation unit 350 is not provided in the calibration system, this step is skipped.

[0067] S4. The central control unit 340 may drive the communication unit 330 to send the detection data and / or detection results to the user terminal and / or drive the display unit 310 to display the detection data and / or detection results on the screen according to the control signal input by the operation unit 320 and / or the communication unit 330 and / or the preset program;

[0068] S5. Disconnect the user terminal from the communication unit 330 and turn off the energy unit 360.

[0069] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and fall within the scope of protection of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", which means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept.

Claims

1. A detection and calibration device based on a calibration system, characterized in that: The detection and calibration device comprises a sensor unit (210) for performing gas detection and a gas storage chamber (220) for storing standard gas. The sensor unit (210) and the gas storage chamber (220) are installed in a manner such that a sensor probe and a gas storage opening (221) of the gas storage chamber (220) are arranged facing each other, so that the sensor probe and the opening of the gas storage chamber (220) are opposite to each other. The gas storage chamber (220) is arranged on a first shell (111) in a main unit (110) of a mechanical part (100), and the sensor unit (210) is arranged on a second shell (112) in the main unit (110) of the mechanical part (100). A driving unit (120) is connected between the first shell (111) and the second shell (112). When the central control unit (340) drives the mechanical part (100) and the detection and calibration device to perform standard gas detection, the driving unit (120) drives the first shell (111) in the main unit (110) of the mechanical part (100) to move along the second direction (2), that is, the gas storage chamber (220) moves in a direction close to the sensor unit (210), so that the gas storage chamber (220) arranged on the first shell (111) can be docked with the sensor unit (210). When the gas storage chamber (220) opens the gas storage opening (221), the standard gas stored in the gas storage chamber (220) overflows from the gas storage opening (221) and contacts the sensor probe, thereby completing the standard gas detection.

2. The detection and calibration device based on the calibration system according to claim 1, characterized in that: The driving unit (120) drives the first shell (111) to move along a first direction (1), so that the internal space of the main unit (110) increases, thereby sucking the gas to be measured in the external space of the main unit (110) into the internal space of the main unit (110) and contacting it with the sensor unit (210) to complete the detection of the gas to be measured and / or environmental influencing factors.

3. The detection and calibration device based on the calibration system according to claim 1 or 2, characterized in that: The gas storage chamber (220) is provided with a gas storage opening (221) on one side relative to the sensor unit (210), and the detection area of the sensor unit (210) can enter the internal space of the gas storage chamber (220) through the gas storage opening (221). The structural dimensions of the gas storage opening (221) match the detection area of the sensor unit (210) with the sensor probe.

4. The detection and calibration device based on the calibration system according to claim 3, characterized in that: The sensor unit (210) is connected to a control unit (130), and under the control of the control unit (130), the gas storage opening (221) can be in an open state at least during the time period from the detection area entering to leaving the gas storage chamber (220).

5. The detection and calibration device based on the calibration system according to claim 4, characterized in that: The driving unit (120) is capable of being connected to the first shell (111) and the second shell (112) and driving the first shell (111) to move, wherein the regulating unit (130) is capable of regulating the opening and closing of the gas storage opening (221) according to the movement condition of the driving unit (120).

6. The detection and calibration device based on the calibration system according to claim 4, characterized in that: The sensor unit (210) can send detection data to a computing unit (350) for data processing, wherein the computing unit (350) can calibrate the detection results obtained after data processing according to standard values detected by standard gas and / or environmental factor detection values collected by a plurality of environmental sensors.

7. The detection and calibration device based on the calibration system according to claim 6, characterized in that: The operation unit (350) can perform calibration fitting on the detection result according to the following formula: Where Y is the compensation calibration value, α is the span calibration coefficient, k1, k2, and k3 are the weights of each item, T is the actual ambient temperature, T0 is the standard value of the sensor temperature, P is the actual atmospheric pressure, P0 is the standard value of the sensor pressure, R is the actual humidity, V is the actual wind speed, x is the actual detection value, and x0 is the standard value of the gas in the gas storage chamber.

8. The detection and calibration device based on the calibration system according to claim 4, characterized in that: The first shell (111) and the second shell (112) are capable of relative displacement so that the size of the internal space of the main unit (110) is adjustable; A turntable carrying the sensor unit (210) is provided on the second shell (112), and the turntable is driven under the control of the control unit (130), so that when the control unit (130) opens the gas storage opening (221), the turntable can be synchronously started to drive the sensor unit (210) to rotate slightly, so that the standard gas sprayed on the surface of the detection area can purge impurities attached to the surface of the sensor probe.

9. The detection and calibration device based on the calibration system according to claim 4, characterized in that: At least a portion of the area containing the sensor probe is set as a detection area, and a snap-fit assembly is provided on the outer edge of the detection area, wherein the snap-fit assembly can match the structure of the gas storage opening (221), so that when the gas storage chamber (220) moves along the second direction (2) to a second maximum offset, the sensor unit (210) can be detachably connected to the gas storage chamber (220) in a manner of being connected to the gas storage opening (221) through the snap-fit assembly, thereby enabling the detection area of the sensor unit (210) to enter the internal space of the gas storage chamber (220) and detect standard gas in the gas storage chamber (220) to obtain a standard value of the standard gas.

10. The detection and calibration device based on the calibration system according to claim 4, characterized in that: The first maximum offset is the limit position at which the first shell (111) moves along the first direction (1) to the gas storage chamber (220) gradually away from the sensor unit (210) and the internal space of the main unit (110) gradually increases to inhale external gas; in the process of the first shell (111) moving from the first maximum offset to the natural state, the sensor unit (210) switches to a closed state to reduce the opening time of the sensor unit (210) when it cannot detect effective gas, and when the first shell (111) has reached the first maximum offset, the driving unit (120) drives the first shell (111) to move along the second direction (2); the second maximum offset is the limit position at which the first shell (111) moves along the second direction (2) to the gas storage chamber (220) and the sensor unit (210) complete docking, the detection area enters the gas storage chamber (220), and the gas storage opening (221) is opened; When the first housing (111) has reached a second maximum offset, the gas storage chamber (220) is docked with the sensor unit (210) so that the detection area of the sensor unit (210) can enter the internal space of the gas storage chamber (220), and detect the standard gas in the gas storage chamber (220); When the sensor unit (210) completes detection of the standard gas, the first housing (111) moves from the second maximum offset along the first direction (1) toward a natural state under the drive of the drive unit (120) and / or the reset unit, and the gas storage opening (221) is closed after the detection area of the sensor unit (210) completely moves out of the gas storage chamber (220).

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