Gas sensor calibration device and gas sensor calibration system

Abstract

The present invention discloses a gas sensor calibration device and a gas sensor calibration system. The gas sensor calibration device includes: a base plate, the base plate being provided with a transmission device; a back plate mounted on the base plate, the back plate being provided with a gas hood mounting surface; at least one gas hood, the gas hood having a gas cavity, the gas hood being provided with an air inlet, an air outlet, and a sensor docking interface communicating with the gas cavity, the gas hood being mounted on the gas hood mounting surface; a mounting base plate, the mounting base plate being provided with an installation station for mounting a gas sensor, the mounting base plate being connected to the transmission device and being capable of driving the mounting base plate toward or away from the gas hood mounting surface so that a detection connector of a gas sensor mounted at the installation station docks with the sensor docking interface; and a power on / off mechanism capable of connecting power to the gas sensor when the gas sensor docks with the sensor docking interface.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor calibration devices, and in particular to a gas sensor calibration device and a gas sensor calibration system. Background Art

[0002] Cable tunnels and joint shafts are dedicated underground passages for laying cables. These environments are often harsh and can produce a wide variety of toxic and hazardous gases with complex compositions. With urban development and rising electricity consumption, cable network coverage is becoming increasingly extensive, making cable failures a common occurrence. To prevent power accidents, various monitoring devices have been installed along cable lines. Consequently, construction and maintenance personnel frequently visit tunnels for installation and inspection. The proper use of sensors in safety systems can effectively prevent tragedies. Gas sensors, in particular, can provide safety systems with information on flammable, combustible, and toxic gases, as well as oxygen consumption in the area. Gas sensors installed in tunnels and joint shafts require calibration to ensure accurate environmental data. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a gas sensor calibration device capable of calibrating a gas sensor.

[0004] The present invention also provides a gas sensor calibration system having the gas sensor calibration device.

[0005] A gas sensor calibration device according to an embodiment of the first aspect of the present invention includes:

[0006] a bottom plate, wherein a transmission device is provided on the bottom plate;

[0007] A back plate, the back plate is mounted on the bottom plate, and the back plate is provided with an air hood mounting surface;

[0008] A gas hood, wherein the number of the gas hoods is at least one, the gas hood having a gas cavity, the gas hood being provided with an air inlet, an air outlet, and a sensor docking port communicating with the gas cavity, and the gas hood being mounted on the gas hood mounting surface;

[0009] A mounting base plate is provided on the mounting base plate, wherein a mounting station for mounting a gas sensor is provided on the mounting base plate, and the mounting base plate is connected to the transmission device and can drive the mounting base plate toward or away from the gas hood mounting surface so that a detection connector of the gas sensor mounted on the mounting station is docked with the sensor docking interface;

[0010] The power on / off mechanism can connect the gas sensor to the power supply when the gas sensor is docked with the sensor docking interface.

[0011] The gas sensor calibration device according to the embodiment of the present invention has at least the following beneficial effects: when calibrating a gas sensor using the gas sensor calibration device of the present application, the gas sensor is installed on the installation station, and under the action of the transmission device, the installation base plate moves toward the gas hood installation surface, so that the detection connector of the gas sensor is docked with the sensor docking interface, and the standard gas sample enters the gas cavity of the gas hood from the air inlet, and the detection connector of the gas sensor performs gas sample detection on the gas sample in the gas cavity. If the data measured by the gas sensor is consistent with the standard gas sample, the gas sensor is normal; if the data measured by the gas sensor is inconsistent with the standard gas sample, the gas sensor is abnormal and needs to be calibrated. The operator completes the calibration of the gas sensor through debugging until the data measured by the gas sensor is consistent with the standard gas sample.

[0012] Among them, the power on / off mechanism can connect the gas sensor to the power supply when the gas sensor is docked with the sensor interface, so that the gas sensor displays power, which is convenient for reading data and comparing it with standard data during measurement. When the gas sensor is separated from the sensor interface, the gas sensor is disconnected from the power supply, which is convenient for replacing a new gas sensor.

[0013] According to some embodiments of the present invention, the power on-off mechanism includes at least one group of fixed rods, sliders, movable rods, connecting rods, ejector pin mounting brackets and electrified ejector pins, the movable rods are vertically arranged on the mounting base plate, the sliders are slidably arranged on the movable rods and can slide up and down on the movable rods, the fixed rods are vertically arranged on the base plate and are located in the movement direction of the mounting base plate, one end of the connecting rod is hinged to the fixed rod, and the other end is hinged to the slider, the ejector pin is connected to the connecting rod through the ejector pin mounting bracket, the ejector pin is located above the mounting station, and during the downward movement of the ejector pin, when the gas sensor is docked with the sensor docking interface, the gas sensor can be pressed and energized.

[0014] According to some embodiments of the present invention, there are multiple gas hoods, the number of the installation stations corresponds to the number of the gas hoods, and there is a one-to-one correspondence between the installation stations and the gas hoods, so that the detection connector of each gas sensor installed at the installation station can be docked with the corresponding sensor docking interface;

[0015] The number of the ejector pins corresponds to the number of the installation stations, and the ejector pins are arranged one by one above the installation stations, so that each ejector pin can contact and energize the gas sensor installed on the installation station during downward movement.

[0016] According to some embodiments of the present invention, there are multiple gas hoods, the number of the installation stations corresponds to the number of the gas hoods, and there is a one-to-one correspondence between the installation stations and the gas hoods, so that the detection connector of each gas sensor installed at the installation station can be docked with the corresponding sensor docking interface.

[0017] According to some embodiments of the present invention, the gas hoods are connected in series via air pipes.

[0018] According to some embodiments of the present invention, the transmission device includes a guide rail and a transmission component. The guide rail is installed on the base plate and has a guide stroke away from and close to the gas hood mounting surface. The mounting base plate is slidably installed on the guide rail. The mounting base plate is connected to the transmission component and can slide along the guide rail.

[0019] According to some embodiments of the present invention, the air hood is cylindrical, and the air inlet is arranged on a side wall of the air hood.

[0020] According to some embodiments of the present invention, the air outlet is provided on an end surface of the air hood away from the sensor docking port.

[0021] According to some embodiments of the present invention, a sealing ring is provided at the interface of the sensor to the interface.

[0022] According to the second aspect of the present invention, a gas sensor calibration system includes: the above-mentioned gas sensor calibration device, and a gas sample supply system for providing standard gas samples, the gas sample supply system is connected to the air inlet of the first gas hood through an air inlet pipe; an exhaust gas treatment system for treating exhaust gas, the exhaust gas treatment system is connected to the air outlet of the last gas hood through an exhaust pipe.

[0023] The gas sensor calibration system according to the embodiment of the present invention has at least the following beneficial effects: when calibrating the gas sensor using the gas sensor calibration system of the present application, the gas sensor is installed on the installation station, and under the action of the transmission device, the installation base plate moves toward the gas hood installation surface, so that the detection connector of the gas sensor and the sensor docking interface are docked together, and the standard gas sample enters the gas cavity of the gas hood from the air inlet, and the detection connector of the gas sensor performs gas sample detection on the gas sample in the gas cavity.

[0024] If the data measured by the gas sensor is consistent with the standard gas sample, the gas sensor is normal; if the data measured by the gas sensor is inconsistent with the standard gas sample, the gas sensor is abnormal and needs to be calibrated. The operator debugs until the data measured by the gas sensor is consistent with the standard gas sample, completing the gas sensor calibration. One or more gas sensors can be calibrated at a time. After the standard gas sample is discharged from the gas sensor, it enters the exhaust gas treatment system to treat the exhaust gas, preventing safety accidents and environmental pollution.

[0025] According to some embodiments of the present invention, the gas sample supply system includes a gas cylinder, a pressure reducing valve and a universal calibration device for a gas detector, wherein the gas cylinder, the pressure reducing valve and the universal calibration device for a gas detector are connected in sequence through an air pipe, and the universal calibration device for a gas detector is connected to the air inlet of the first gas hood through the air inlet pipe.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 A schematic diagram of the three-dimensional structure of a gas sensor calibration device according to an embodiment of the present invention;

[0029] Figure 2 This is a structural diagram of an embodiment of the present invention in which the ejector pin and the gas sensor are disconnected;

[0030] Figure 3 This is a schematic structural diagram of the embodiment of the present invention in which the ejector pin and the gas sensor are in a closed state;

[0031] Figure 4 This is a schematic diagram of the front structure of a gas sensor calibration system according to an embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the planar structure of the gas sensor calibration system according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Base plate 100; back plate 200, gas hood mounting surface 210; gas hood 300; mounting base plate 400; gas sensor 500, detection connector 510; air pipe 600; guide rail 710, transmission component 720; air inlet pipe 810, gas cylinder 820, pressure reducing valve 830, gas detector universal calibration device 840; exhaust gas treatment system 900, air outlet pipe 910; fixed rod 110, slider 120, movable rod 130, connecting rod 140, ejector mounting bracket 150, ejector 160. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] like Figure 1 As shown, a gas sensor calibration device according to an embodiment of the present invention includes:

[0041] The bottom plate 100 is provided with a transmission device; the bottom plate 100 is provided with a mounting surface, and the transmission device is provided on the mounting surface.

[0042] The back plate 200 is installed on the base plate 100 , and the back plate 200 is provided with an air hood mounting surface 210 ; in this embodiment, the back plate 200 is vertically installed on the base plate 100 , and one of the vertical plate surfaces is the air hood mounting surface 210 .

[0043] At least one gas hood 300 is provided. The gas hood 300 has a gas cavity and is provided with an air inlet, an air outlet, and a sensor interface that communicate with the gas cavity. The gas hood 300 is mounted on the gas hood mounting surface 210. A gas sample can enter through the air inlet and exit through the air outlet. After the detection connector 510 is connected to the sensor interface, the detection connector 510 can contact the gas sample in the gas cavity.

[0044] The mounting base plate 400 is provided with an installation station for mounting the gas sensor 500. The mounting base plate 400 is connected to a transmission device, which can drive the mounting base plate 400 toward or away from the gas hood mounting surface 210 so that the detection connector 510 of the gas sensor 500 installed at the installation station is docked with the sensor docking interface;

[0045] The power on / off mechanism can turn on the power of the gas sensor 500 when the gas sensor 500 is docked with the sensor docking port.

[0046] When calibrating the gas sensor 500 using the gas sensor calibration device of the present application, the gas sensor 500 is installed on the installation station. Under the action of the transmission device, the installation base plate 400 moves toward the gas hood installation surface 210, so that the detection connector 510 of the gas sensor 500 is docked with the sensor docking interface, and the standard gas sample enters the gas cavity of the gas hood 300 from the air inlet, and the detection connector 510 of the gas sensor 500 performs gas sample detection on the gas sample in the gas cavity.

[0047] If the data measured by the gas sensor 500 is consistent with the standard gas sample, the gas sensor 500 is normal; if the data measured by the gas sensor 500 is inconsistent with the standard gas sample, the gas sensor 500 is abnormal and needs to be calibrated. The operator completes the calibration of the gas sensor 500 through debugging until the data measured by the gas sensor 500 is consistent with the standard gas sample.

[0048] After the gas sensor 500 is calibrated, under the action of the transmission device, the installation base plate 400 moves in the direction away from the gas hood installation surface 210, and the detection connector 510 is disengaged from the sensor docking interface. The calibrated detection connector 510 is removed from the installation station and replaced with the gas sensor 500 to be calibrated. Repeat the above operation to continue calibrating the next gas sensor 500.

[0049] The power on / off mechanism connects the gas sensor 500 to the sensor interface, providing a power display and convenient comparison of measured data with standard data. When the gas sensor 500 is disconnected from the sensor interface, the power on / off mechanism disconnects the gas sensor 500, facilitating replacement of the gas sensor.

[0050] In some embodiments of the present invention, Figure 1 Combine Figure 2 and Figure 3 As shown, the power on-off mechanism includes at least one group of fixed rods 110, sliders 120, movable rods 130, connecting rods 140, ejector pin mounting brackets 150 and electrified ejector pins 160. The movable rod 130 is vertically arranged on the mounting base 400. The slider 120 is slidably arranged on the movable rod 130 and can slide up and down on the movable rod 130. The fixed rod 110 is vertically arranged on the base 100 and is located in the movement direction of the mounting base 400. One end of the connecting rod 140 is hinged to the fixed rod 110, and the other end is hinged to the slider 120. The ejector pin 160 is connected to the connecting rod 130 through the ejector pin mounting bracket 150. The ejector pin 160 is located above the installation station. During the downward movement, the ejector pin 160 can contact and press the gas sensor 500 to energize it when the gas sensor 500 is docked with the sensor docking interface.

[0051] Under the action of the transmission device, the mounting base plate 400 moves toward the gas hood mounting surface 210, and the movable rod 130 moves with the mounting base plate 400. When the mounting base plate 400 moves toward the gas hood mounting surface 210, the slider 120 slides downward along the movable rod 130 under the action of the connecting rod 140 and the fixed rod 110, driving the ejector pin 160 fixed on the ejector pin mounting bracket 150 to move diagonally downward.

[0052] When the gas sensor 500 is docked with the sensor docking interface, the charged ejector pin 160 contacts and presses the gas sensor 500 to energize it. Specifically, the ejector pin 160 contacts the power contact point of the PCB processing board on the gas sensor 500 and generates a certain contact pressure, so that the gas sensor 500 is displayed as charged, which is convenient for reading data and comparing it with standard data during measurement.

[0053] After the gas sensor 500 is calibrated, the transmission mechanism causes the mounting base 400 to move away from the gas hood mounting surface 210. The movable rod 130 moves along with the mounting base 400. The slider 120, under the action of the connecting rod 140 and the fixed rod 110, slides upward along the movable rod 130, driving the ejector pin 160 fixed to the ejector pin mounting bracket 150 upward until it returns to its initial position. This disconnects the ejector pin 160 from the gas sensor 500, deenergizing the gas sensor 500, making it easier to replace the gas sensor 500 to be calibrated, allowing for efficient and orderly calibration.

[0054] In some embodiments of the present invention, there are multiple gas hoods 300, the number of installation stations corresponds to the number of gas hoods 300, and there is a one-to-one correspondence between the installation stations and the gas hoods 300, so that the detection connector 510 of each gas sensor 500 installed at the installation station can be docked with the corresponding sensor docking interface;

[0055] The number of ejector pins 160 corresponds to the number of installation stations. The ejector pins 160 are arranged one by one above the installation stations, so that each ejector pin 160 can contact and energize the gas sensor 500 installed on the corresponding installation station during downward movement.

[0056] By arranging multiple gas hoods 300 on the gas hood mounting surface 210 and arranging multiple installation stations on the installation base plate 400 (wherein the installation stations are on cylindrical rods with tapered surfaces to facilitate the replacement of the gas sensors 500), under the action of the transmission device, the installation base plate 400 moves toward the gas hood mounting surface 210, so that the detection connector 510 of each gas sensor 500 installed at the installation station can be docked with the corresponding sensor docking interface.

[0057] The number of ejector pins 160 corresponds to the number of installation stations. This ensures that when a gas sensor 500 installed at a station docks with the corresponding sensor docking port, each ejector pin 160 contacts and energizes the gas sensor 500 at the corresponding station. This allows calibration of multiple gas sensors 500 at once, improving work efficiency.

[0058] Specifically, in this embodiment, the mounting base plate 400 is a rectangular mounting plate, the mounting stations are arranged at intervals along the mounting plate, the back plate 200 is arranged on one side of the mounting base plate 400, and is arranged perpendicular to the mounting base plate 400. The length of the mounting base plate 400 can be extended or shortened according to the number of mounting stations. The specific number of mounting stations is not limited, and is set according to the number of gas sensors 500 to be calibrated simultaneously as needed.

[0059] The ejector mounting bracket 150 is a long strip of mounting connecting rod, which is laterally arranged above all the mounting stations. The ejectors 160 are arranged on the mounting connecting rod and correspond one-to-one to the mounting stations below.

[0060] At the same time, if Figure 1 As shown, to improve installation stability, the number of fixed rods 110, sliders 120, movable rods 130, and connecting rods 140 is two each, so that both ends of the mounting connecting rods can be connected to a single connecting rod 140. This improves the installation stability of the ejector mounting bracket 150, and the ejector mounting bracket 150 can move along with the connecting rod 140.

[0061] In some embodiments of the present invention, the gas hoods 300 are connected in series via gas pipes 600 .

[0062] Each gas hood 300 can be connected to an air inlet pipe, or each gas hood 300 can be connected in series so that the gas sample flows through each gas hood 300 in sequence. In this application, the gas hoods 300 are connected in series through air pipes 600, which can simplify the product structure and reduce costs.

[0063] In some embodiments of the present invention, the transmission device includes a guide rail 710 and a transmission component 720. The guide rail 710 is installed on the base plate 100 and has a guide stroke away from and close to the gas hood mounting surface 210. The mounting base plate 400 is slidably installed on the guide rail 710. The mounting base plate 400 and the transmission component 720 are connected and can slide along the guide rail 710.

[0064] A slider is mounted on the lower portion of the mounting base 400. The slider is slidably mounted within the guide rail 710 and is capable of sliding along the guide rail 710. The mounting base 400 slides within the guide rail 710 under the control of a transmission member 720. In this embodiment, the transmission member 720 is a screw. Rotating the screw by a handle or by a motor drives the screw, and the screw's threaded rotation drives the mounting base 400 to slide. The forward and reverse rotation of the screw controls the mounting base 400's forward and backward sliding on the guide rail 710. The transmission member 720 may also employ other structures, such as controlling the forward and backward sliding of the mounting base 400 on the guide rail 710 by extending and retracting a telescopic rod.

[0065] In some embodiments of the present invention, the gas hood 300 is cylindrical, one end of the gas hood 300 is connected to the gas hood mounting surface 210 , the other end is provided with a sensor docking port, and the air inlet is provided on the side wall of the gas hood 300 .

[0066] The air inlet is set on the side wall of the gas hood 300. The standard gas sample enters from the side of the gas hood 300 to prevent the standard gas sample from blowing directly towards the gas sensor 500 body, which would cause the measured data value to be too high. Blowing in from the side through the arc-shaped surface allows the gas to be evenly filled in the gas hood 300, thereby improving the accuracy of gas calibration.

[0067] In some embodiments of the present invention, the gas outlet is located on the end face of the gas hood 300 away from the sensor interface. In this embodiment, the gas outlet and the sensor interface are positioned opposite each other, while the gas inlet and gas outlet are staggered. This prevents gas from the gas inlet from being directly blown into the gas outlet, thereby increasing the gas's residence time in the gas chamber of the gas hood 300 and improving the accuracy of gas calibration.

[0068] In some embodiments of the present invention, a sealing ring is provided at the interface of the sensor interface. This provides an interference fit between the detection connector 510 of the gas sensor 500 and the sensor interface, preventing gas leakage that could lead to inaccurate gas sensor readings. This also prevents gas leakage from contaminating the environment and creating safety hazards.

[0069] like Figure 3 and Figure 4 As shown, the present invention also discloses a gas sensor calibration system, comprising: the gas sensor calibration device mentioned above, and

[0070] A gas sample supply system, for providing a standard gas sample, the gas sample supply system being connected to the gas inlet of the first gas hood 300 via an air inlet pipe 810;

[0071] The tail gas treatment system 900 is used to treat the tail gas. The tail gas treatment system 900 is connected to the gas outlet of the last gas hood 300 through the gas outlet pipe 910.

[0072] When calibrating the gas sensor 500 using the gas sensor calibration device of the present application, the gas sensor 500 is installed on the installation station. Under the action of the transmission device, the installation base plate 400 moves toward the gas hood installation surface 210, so that the detection connector 510 of the gas sensor 500 is docked with the sensor docking interface.

[0073] The gas sample supply system is connected to the gas inlet of the first gas hood 300 through the gas inlet pipe 810. The standard gas sample enters the gas cavity of the gas hood 300 from the gas inlet. The detection connector 510 of the gas sensor 500 performs gas sample detection on the gas sample in the gas cavity.

[0074] If the data measured by the gas sensor 500 is consistent with the standard gas sample, the gas sensor 500 is normal; if the data measured by the gas sensor 500 is inconsistent with the standard gas sample, the gas sensor 500 is abnormal and needs to be calibrated. The operator completes the calibration of the gas sensor 500 through debugging until the data measured by the gas sensor 500 is consistent with the standard gas sample.

[0075] After the gas sensor 500 is calibrated, under the action of the transmission device, the installation base plate 400 moves in the direction away from the gas hood installation surface 210, and the detection connector 510 is disengaged from the sensor docking interface. The calibrated detection connector 510 is removed from the installation station and replaced with the gas sensor 500 to be calibrated. Repeat the above operation to continue calibrating the next gas sensor 500.

[0076] However, the gases in cable tunnels are of various types and complex compositions, and some are toxic and harmful. The gas sensor calibration system of the present application can calibrate one or more gas sensors at a time.

[0077] The gases in cable tunnels are of various types and complex composition, some of which are toxic and harmful. After being discharged from the gas sensor 500, the standard gas sample enters the exhaust gas treatment system 900 to treat the exhaust gas to prevent safety accidents and environmental pollution.

[0078] In some embodiments of the present invention, the gas sample supply system includes a gas cylinder 820, a pressure reducing valve 830 and a universal calibration device 840 for a gas detector. The gas cylinder 820, the pressure reducing valve 830 and the universal calibration device 840 for a gas detector are connected in sequence through air pipes, and the universal calibration device 840 for a gas detector is connected to the air inlet of the first gas hood 300 through an air inlet pipe 810.

[0079] Different types of gas sensors 500 require different gases for measurement, and different gas cylinders 820 are filled with different gases. The gas from each cylinder 820 is regulated by a pressure reducing valve 830, reducing the inlet pressure to a desired outlet pressure. The outlet pressure is then automatically stabilized by the energy of the gas itself.

[0080] Stable gas enters the five-choice path of the gas detector universal calibration device 840 through the air inlet pipe 810. The five-choice path of the gas detector universal calibration device 840 selects one of the gases for calibration, and the glass rotor flowmeter on the gas detector universal calibration device 840 controls the flow rate and flow velocity of the output gas.

[0081] In some embodiments of the present invention, the air inlet pipe 810 is a hose. In this embodiment, the air inlet pipe 810 is a hose, which is convenient for plugging and unplugging, and a spring hose clamp can be used to control the on and off of the gas.

[0082] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A gas sensor calibration device, characterized in that: include: a bottom plate, wherein a transmission device is provided on the bottom plate; A back plate, the back plate is mounted on the bottom plate, and the back plate is provided with an air hood mounting surface; A gas hood, wherein the number of the gas hoods is at least one, the gas hood having a gas cavity, the gas hood being provided with an air inlet, an air outlet, and a sensor docking port communicating with the gas cavity, and the gas hood being mounted on the gas hood mounting surface; A mounting base plate is provided on the mounting base plate, wherein a mounting station for mounting a gas sensor is provided on the mounting base plate, and the mounting base plate is connected to the transmission device and can drive the mounting base plate toward or away from the gas hood mounting surface so that a detection connector of the gas sensor mounted on the mounting station is docked with the sensor docking interface; a power on / off mechanism, capable of connecting the gas sensor to a power source when the gas sensor is docked with the sensor docking interface; The power on-off mechanism includes at least one set of fixed rods, sliders, movable rods, connecting rods, ejector mounting brackets and electrified ejector pins, wherein the movable rods are vertically arranged on the mounting base, the sliders are slidably arranged on the movable rods and can slide up and down on the movable rods, the fixed rods are vertically arranged on the base plate and are located in the movement direction of the mounting base plate, one end of the connecting rod is hinged to the fixed rod, and the other end is hinged to the slider, the ejector pin is connected to the connecting rod via the ejector mounting bracket, the ejector pin is located above the mounting station, and when the ejector pin moves downwards, it can contact and press the gas sensor to electrify when the gas sensor is docked with the sensor docking interface; The transmission device includes a guide rail and a transmission member, wherein the guide rail is mounted on the base plate and has a guide stroke away from and close to the gas hood mounting surface, and the mounting base plate is slidably mounted on the guide rail. The mounting base plate is connected to the transmission member and can slide along the guide rail; The air hood is cylindrical, and the air inlet is arranged on the side wall of the air hood.

2. The gas sensor calibration device according to claim 1, characterized in that: There are multiple gas hoods, the number of the installation stations corresponds to the number of the gas hoods, and there is a one-to-one correspondence between the installation stations and the gas hoods, so that the detection connector of each gas sensor installed at the installation station can be docked with the corresponding sensor docking interface; The number of the ejector pins corresponds to the number of the installation stations, and the ejector pins are arranged one by one above the installation stations, so that each ejector pin can contact and energize the gas sensor installed on the installation station during downward movement.

3. The gas sensor calibration device according to claim 2, characterized in that: The air hoods are connected in series through air pipes.

4. The gas sensor calibration device according to claim 1, characterized in that: The air outlet is arranged on the end surface of the air cover away from the sensor docking port.

5. The gas sensor calibration device according to claim 1, characterized in that: A sealing ring is provided at the interface of the sensor to the interface.

6. A gas sensor calibration system, characterized in that: include: The gas sensor calibration device according to any one of claims 1 to 5, and A gas sample supply system, for providing a standard gas sample, wherein the gas sample supply system is connected to the gas inlet of the first gas hood via an air inlet pipe; An exhaust gas treatment system is used to treat exhaust gas, and the exhaust gas treatment system is connected to the exhaust port of the last gas hood through an exhaust pipe.

7. The gas sensor calibration system according to claim 6, characterized in that: The gas sample supply system includes a gas cylinder, a pressure reducing valve and a universal calibration device for gas detectors. The gas cylinder, the pressure reducing valve and the universal calibration device for gas detectors are connected in sequence through air pipes. The universal calibration device for gas detectors is connected to the air inlet of the first gas hood through the air inlet pipe.

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