CN216870501U

CN216870501U - Nitrogen oxygen sensor calibration device and batch calibration equipment

Info

Publication number: CN216870501U
Application number: CN202123348350.1U
Authority: CN
Inventors: 尚合明; 张敏环
Original assignee: Wuhan Axel Technology Co ltd
Current assignee: Wuhan Axel Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-01
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a nitrogen-oxygen sensor calibration device and batch calibration equipment, which comprise a calibration table and an elastic gasket, wherein the calibration table comprises a calibration table body and a containing groove arranged on the calibration table body; the calibration table body is provided with two vent holes communicated with the accommodating groove; the accommodating groove is provided with an annular groove along the groove wall in a circle between the notch and the two vent holes; the elastic gasket comprises a clamping ring and a sleeve joint barrel, and an inner ring of the clamping ring is connected with one end of the sleeve joint barrel; the clamping ring is embedded in the annular groove of the accommodating groove, and the outer wall of the sleeve joint cylinder is abutted against the groove wall of the accommodating groove; the sleeve joint barrel of the elastic gasket is used for being sleeved with a probe of an external nitrogen-oxygen sensor. The utility model can realize the quick fixation, sealing and replacement of the sensor probe, has good sealing effect and is convenient for batch calibration; meanwhile, the required standard gas amount is small, standard gas resources are saved, and calibration efficiency is improved.

Description

Nitrogen oxygen sensor calibration device and batch calibration equipment

Technical Field

The utility model relates to the technical field of gas measurement, in particular to a nitrogen-oxygen sensor calibration device and batch calibration equipment.

Background

The nitrogen-oxygen sensor generally comprises a sensor probe, a wiring harness and a control unit, wherein the control unit is connected with the sensor probe through the wiring harness and is used for controlling the sensor probe to work, receiving signals sent by the sensor and supplying power to the sensor.

The calibration of the nitrogen-oxygen sensor is mainly completed by detecting and adjusting the performance of a sensor probe. During calibration, a sensor probe is inserted into an air duct, the inserted interface is sealed, and then the air in the air duct is replaced by standard air until the standard air is full of the whole pipeline, so that calibration can be started.

Disclosure of Invention

The inventor finds that in the prior art, when the nitrogen-oxygen sensor is calibrated, the time spent for standard gas to diffuse to the whole pipeline is long, and the consumption of the standard gas is also large; in addition, the contact place between the sensor probe and the pipeline has the defects that the sealing performance is difficult to guarantee, or the sealing process is complicated, and the calibration efficiency is influenced. In order to at least partially solve the technical problems in the prior art, the inventor makes the present invention, and provides the following technical solutions through specific embodiments:

the utility model provides a nitrogen-oxygen sensor calibration device, which comprises a calibration table and an elastic gasket, wherein:

the calibration table comprises a calibration table body and an accommodating groove arranged on the calibration table body; the calibration table body is provided with two vent holes communicated with the accommodating groove; the accommodating groove is also provided with an annular groove along the groove wall in a circle between the notch and the two vent holes;

the elastic gasket comprises a clamping ring and a sleeve joint barrel, and an inner ring of the clamping ring is connected with an opening at one end of the sleeve joint barrel; the clamping ring is embedded in the annular groove of the accommodating groove, and the outer wall of the sleeve joint cylinder is abutted against the groove wall of the accommodating groove;

the sleeve joint barrel of the elastic gasket is used for being sleeved with a probe of an external nitrogen-oxygen sensor.

Furthermore, two air vents include an inlet port and an air outlet, the axis of inlet port with the axis of air outlet is apart from the difference in height of holding tank bottom.

Further, the two vent holes are respectively arranged on two opposite sides of the accommodating groove.

Furthermore, an air pipe connector communicated with the vent hole is further arranged on the outer surface of the calibration table body.

Furthermore, the inner wall or the outer wall of the air pipe connector is provided with threads.

Furthermore, the bottom of demarcation platform body is equipped with at least one screw.

Furthermore, the bottom of the calibration table body is provided with a mounting foot, and the at least one screw hole is formed in the mounting foot.

On the other hand, the utility model provides a nitrogen oxygen sensor batch calibration device, which comprises a calibration box body, a sensor power distribution module, a sensor calibration control module, a gas distribution module, a display module and at least two nitrogen oxygen sensor calibration devices, wherein the sensor power distribution module, the sensor calibration control module, the gas distribution module and the display module are arranged in the calibration box body, and the nitrogen oxygen sensor batch calibration device comprises:

every two adjacent vent holes of two adjacent nitrogen oxygen sensor calibration devices in the at least two nitrogen oxygen sensor calibration devices are connected through an air pipe, the vent holes at one end of the at least two connected nitrogen oxygen sensor calibration devices are connected to the air distribution outlet of the air distribution module through the air pipe, and the vent holes at the other end of the at least two connected nitrogen oxygen sensor calibration devices are used for being connected with an external waste gas recovery device.

Further, the batch calibration equipment for the nitrogen-oxygen sensors further comprises a gas chamber support plate, and the gas chamber support plate is arranged in parallel to a gas chamber side shell of the calibration box body;

the at least two nitrogen-oxygen sensor calibration devices are fixedly connected between the gas chamber support plate and the gas chamber side shell; and external through holes corresponding to the accommodating grooves in the at least two nitrogen-oxygen sensor calibration devices are formed in the side shell of the gas chamber, and the notch of each accommodating groove is connected to one external through hole.

Furthermore, the sensor power distribution module and the sensor calibration control module are provided with the same number of synthetic interfaces as the accommodating grooves on the at least two nitrogen-oxygen sensor calibration devices on the outer surface of the calibration box body; the synthetic interface is used for being connected with a wire harness connector of the nitrogen-oxygen sensor.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

according to the embodiment of the utility model, the calibration platform is provided with the accommodating tank and two vent holes communicated with the accommodating tank, the upper sides of the two vent holes are provided with annular grooves along the wall of the tank in a circle, the annular grooves are internally embedded with the elastic gaskets, the elastic gaskets are provided with the clamping rings and the sleeve barrels, the clamping rings are embedded into the annular grooves of the accommodating tank, and the sleeve barrels are abutted against the wall of the accommodating tank. When the nitrogen-oxygen sensor probe needs to be calibrated, the nitrogen-oxygen sensor probe is inserted into the accommodating tank through the sleeve of the elastic gasket, so that the sensor probe can be fastened and the notch of the accommodating tank can be sealed; after calibration is finished, the calibrated probe can be directly pulled out, and then a new probe to be calibrated is inserted. Therefore, the embodiment of the utility model can realize the rapid fixing, sealing and replacement of the sensor probe, and has simple fixing, sealing and replacement processes, good sealing effect and convenient batch calibration; meanwhile, the space in the accommodating tank is small, the amount of the standard gas to be filled is small, the time required for completing the replacement of the standard gas in the accommodating tank is short, the standard gas resource is saved, and the calibration efficiency is also improved.

Drawings

FIG. 1 is a schematic structural diagram of a probe of a NOx sensor according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a calibration stand according to a first embodiment of the present invention;

FIG. 3(a) is a schematic structural diagram of an elastic washer according to a first embodiment of the present invention;

FIG. 3(b) is a schematic cross-sectional view of the elastomeric washer of FIG. 3(a) taken along the central axis;

FIG. 4 is a block diagram schematically illustrating a structure of a batch calibration apparatus for NOx sensors in a second embodiment of the present invention;

FIG. 5 is a schematic view of a gas chamber support plate of the batch calibration apparatus for NOx sensors in the second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Example one

It can be known that the gas inlet for detecting gas on the nitrogen-oxygen sensor probe is usually positioned at the front end of the sensor probe, and during calibration, the front end of the sensor probe with the gas inlet is only required to be positioned in the calibration gas. As shown in FIG. 1, the front end of the probe of the NOx sensor is generally cylindrical or is composed of a plurality of sections of cylinders with different diameters, and a fixing thread or other structures for fixing the probe of the NOx sensor in an environment to be measured are arranged near the front end, for example, the thread on the probe can be connected with a corresponding screw hole on an automobile, so as to realize sealing of the joint and fixing of the NOx sensor.

However, when calibrating the nox sensor in batches, if the probe of the nox sensor is fixed and sealed by means of threaded connection, the screw thread of the calibrated probe needs to be loosened and the screw thread of a new probe needs to be tightened each time the nox sensor is replaced, which increases the calibration time and the calibration workload.

The embodiment of the utility model provides a nitrogen oxygen sensor calibration device which can conveniently fix and seal a probe of a nitrogen oxygen sensor and save a calibration gas, and is shown by combining a figure 2 and a figure 3, the nitrogen oxygen sensor calibration device comprises a calibration table 1 and an elastic gasket 2, wherein:

the calibration platform 1 comprises a calibration platform body 11 and an accommodating groove 12 arranged on the calibration platform body 11; the calibration table body 11 is provided with two vent holes 111 communicated with the accommodating groove 12; the receiving groove 12 is further provided with an annular groove 121 running all the way along the groove wall between the notch and the two vent holes 111.

The elastic gasket 2 comprises a clamping ring 21 and a sleeve 22, and an inner ring of the clamping ring 21 is connected with an opening at one end of the sleeve 22; the clamping ring 21 is embedded in the annular groove 121 of the accommodating groove 12, and the outer wall of the sleeve 22 is abutted against the groove wall of the accommodating groove 12.

The sleeve 22 of the elastic gasket 2 is used for sleeve connection with a probe of an external nitrogen-oxygen sensor.

Referring to fig. 1, the following describes the calibration apparatus of the present nox sensor with reference to the nox sensor:

in this embodiment, the diameter of holding tank 12 slightly is greater than the diameter of nitroxide sensor probe front end for the sensor probe front end just can insert in holding tank 12, and can seal the space between sensor probe and holding tank 12 through the socket 22 on the elastic gasket 2, has also fixed the sensor probe when sealed, makes the difficult landing or removal of sensor. Moreover, a circle of raised circular ring is arranged at the front end of some nitrogen-oxygen sensor probes close to the fixed thread, so that the sleeve 22 can be just clamped between the raised circular ring and the fixed thread on the sensor probes, and good fixing and sealing effects are achieved.

In one embodiment, the elastic washer 2 is made of a silica gel material capable of withstanding a high temperature of 200 degrees celsius to adapt to the heat generated by the operation of the nox sensor, and the silica gel washer has good plasticity and can be easily inserted into the annular groove 121 on the groove wall of the accommodating groove 12. In practical application, the clamping ring 21 of the elastic washer 2 can be embedded into the annular groove 121 of the groove wall of the accommodating groove 12 by using a tool such as tweezers or sharp-nose pliers, and the sensor can be calibrated after the clamping ring is placed.

When the nitrogen oxygen sensor needs to be calibrated, the front end of the probe of the nitrogen oxygen sensor is inserted into the accommodating groove 12, so that the front end of the probe of the sensor is sleeved in the sleeved part of the elastic gasket 2, and the notch of the accommodating groove 12 can be sealed and the probe of the sensor can be fixed; after the sensor probe is calibrated, the sensor probe can be directly pulled out and then a new sensor probe to be calibrated is inserted.

The calibration table body 11 is provided with two vent holes 111 communicated with the holding tank 12, one is used for air inlet and the other is used for air outlet, so that the original gas to be tested is filled into the standard gas to be tested and the holding tank 12 is emptied under the condition that the notch of the holding tank 12 is sealed, and replacement is completed. Specifically, in a state where the elastic gasket 2 is inserted into the annular groove 121, the positions of the two vent holes 111 on the calibration table body 11 are lower than the lower edge of the elastic gasket 2, so as to prevent the vent holes 111 from being blocked by the sleeve 22 of the elastic gasket 2.

In one embodiment, the two ventilation holes 111 include an air inlet hole 1111 and an air outlet hole 1112, and the heights of the central axes of the air inlet hole 1111 and the air outlet hole 1112 are different from the bottom of the receiving groove 12. It can be understood that if the two vent holes 111 are at the same height, the standard gas entering from the air inlet 1111 can easily flow out from the air outlet 1112 directly, resulting in a slower process of standard gas replacement and more consumption of standard gas. Two air vents 111 are staggered in height, so that the vertical distance from the air inlet to the air outlet is increased, the standard air can diffuse in the accommodating groove 12 more quickly, and the replacement time is shortened. Preferably, the distance between the two vent holes 111 is set as large as possible within the depth range of the accommodating groove 12, so as to better evacuate the original gas in the accommodating groove 12 and complete the standard gas replacement.

The depth of the holding tank 12 needs to meet the length of the front end of the nox sensor probe, but it cannot be too deep to avoid waste of the marker gas, and therefore, the depth of the holding tank 12 can be set to be slightly larger than the length of the front end of the sensor probe. Since the size of the front end of the nox sensor probe itself is small, the depth of the housing tank 12 is not set too deep, and for example, in the case where the length of the front end of the nox sensor probe is 2.7cm, it may be set to 4.3cm to 4.5 cm.

Preferably, in actual use, the vent hole 111 closer to the notch of the housing tank 12 among the two vent holes 111 is used as the air inlet hole 1111, and the vent hole 111 closer to the bottom surface of the housing tank 12 is used as the air outlet hole 1112. It will be appreciated that the inlet port for the gas to be sensed by the nitroxide sensor probe is typically located at the tip of the probe and is located as a ring of small holes along the wall of the probe slot. When the preceding end of nitrogen oxygen sensor probe inserts holding tank 12 completely, the air inlet of nitrogen oxygen sensor probe will be more close to the air vent 111 that is located the downside, under the equal less condition of holding tank 12 diameter and the degree of depth itself, the interval between the air vent 111 that is located the downside and the air inlet of nitrogen oxygen sensor probe is very little, if direct from downside air vent 111 input mark gas, mark gas easily strikes on the air inlet of nitrogen oxygen sensor probe. On one hand, it can be known that the ceramic chip for detecting gas in the sensor probe can normally work only by heating to over 600 ℃, and the standard gas directly impacts the gas inlet on the probe, so that the temperature of the sensor probe is easily reduced, and the normal work of the sensor probe is influenced; on the other hand, the standard gas directly impacts the gas inlet on the probe, so that the gas pressure difference exists at the gas inlet, which may cause the gas at the gas inlet to be uneven, thereby causing measurement errors; in addition, from the test results, the time required for the standard gas to enter from the upper vent hole 111 and exit from the lower vent hole 111 and to be replaced is shorter, so the calibration efficiency is higher, and the gas consumption is less, and the specific reason is considered to relate to the gas distribution condition after the nox sensor probe is completely inserted into the housing tank 12, and in the inserted state, a certain distance exists between the bottom surface of the housing tank 12 and the tip of the nox sensor probe, so that a large amount of the original gas exists in the lower space of the housing tank 12, and if the part of the original gas is exhausted from the upper vent hole 111, a longer diffusion time is required.

In one embodiment, two vent holes 111 are respectively disposed at opposite sides of the receiving groove 12. It can be understood that when the front end of the nitrogen oxygen sensor probe is completely inserted into the accommodating groove 12, the standard gas input from the vent hole 111 will be blocked by the probe and will not directly reach the opposite side, so the fluidity of the gas on the opposite side is small. In this embodiment, the two vent holes 111 are disposed on the opposite two sides, which can better promote the flow of the gas in the whole accommodating groove 12 compared with the same side, so as to evacuate the original gas more quickly and complete the standard gas replacement; in addition, when calibrating the nox sensor probe in the plurality of housing tanks 12, the series connection of the inlet port 1111 and the outlet port 1112 between the housing tanks 12 is facilitated.

It should be noted that, it is the solution of the present embodiment that a plurality of the accommodating tanks 12 are provided on one calibration table 1, or a plurality of the nox sensor calibration apparatuses are assembled into a whole through a simple structure. Compared with the scheme that only one accommodating groove 12 is arranged on each calibration platform 1, the scheme has the advantages that the material utilization rate of the calibration platform 1 is lower, certain material waste is caused, and the weight of the device is increased.

This embodiment has set up holding tank 12 and two air vents 111 that communicate with holding tank 12 on demarcating platform 1 to set up the annular groove 121 along the cell wall round at the upside of two air vents 111, annular groove 121 is embedded to have elastic gasket 2, is equipped with joint ring 21 and socket joint section of thick bamboo 22 on the elastic gasket 2, and wherein, in the annular groove 121 of joint ring 21 embedding holding tank 12, socket joint section of

thick bamboo

22 and 12 cell wall butts of holding tank. When the nitrogen-oxygen sensor probe needs to be calibrated, the nitrogen-oxygen sensor probe is inserted into the accommodating groove 12 through the sleeve 22 of the elastic gasket 2, so that the sensor probe can be fastened and the groove opening of the accommodating groove 12 can be sealed; after calibration is finished, the calibrated probe can be directly pulled out, and then a new probe to be calibrated is inserted. Therefore, the embodiment can realize the rapid fixing, sealing and replacement of the sensor probe, and has simple fixing, sealing and replacement processes, good sealing effect and convenient batch calibration; meanwhile, the space in the accommodating groove 12 is small, the amount of the standard gas to be filled is small, the time required for completing the replacement of the standard gas in the accommodating groove 12 is short, the standard gas resource is saved, and the calibration efficiency is also improved.

In some embodiments, as shown in fig. 2, an air tube interface 13 communicating with the air vent 111 is further disposed on the outer surface of the calibration stand body 11. It can be understood that the air pipe connector 13 disposed on the calibration table body 11 and communicated with the air hole 111 can be directly sleeved with the air pipe, and the connection position is convenient for sealing. Preferably, the inner or outer wall of the air pipe connector 13 is threaded to facilitate direct threaded connection with the air pipe connector. To facilitate the threaded connection, the air tube connector 13 may be provided in a cylindrical shape.

In some embodiments, as shown in fig. 2, the bottom of the calibration stand body 11 is provided with at least one screw hole 1121. It can be understood that, the bottom of the calibration platform body 11 is provided with the screw hole 1121, so that the calibration platform 1 can be conveniently fixed at a specified position through a bolt, so as to ensure that the position of the calibration platform 1 is relatively stable, and thus ensure the stability of the calibration platform 1 during the calibration process and when the probe of the nitrogen-oxygen sensor is inserted and removed. Preferably, one screw hole 1121 or more screw holes 1121 may be disposed at four corners of the bottom of the calibration table body 11 to enhance the fixing effect.

In one embodiment, as shown in fig. 2, the bottom of the calibration platform body 11 is provided with a mounting foot 112, and the at least one screw hole 1121 is disposed on the mounting foot 112. It can be understood that, the calibration platform 1 is mainly for disposing the receiving groove 12, and the calibration platform body 11 outside the receiving groove 12 does not need to be too large in size, so as to save manufacturing materials, in this case, the space available for disposing the screw hole 1121 on the calibration platform body 11 is less, and the disposition of the screw hole 1121 easily affects the structural stability of the receiving groove 12. Therefore, the bottom edge of the calibration table body 11 can be provided with the mounting feet 112, specifically, the mounting feet 112 can be fixedly connected with the calibration table body 11, and also can be integrally formed with the calibration table body 11, and good stability is provided between the two, and then the screw holes 1121 are provided on the mounting feet 112, so that the structural stability of the accommodating groove 12 is not affected while the calibration table 1 is fixed.

Example two

Based on the inventive concept of the first embodiment, an embodiment of the present invention further provides a batch calibration apparatus for a nitrogen oxygen sensor, as shown in fig. 4, including a calibration box 301, a sensor power distribution module 302, a sensor calibration control module 303, a gas distribution module 304, a display module 305 and at least two nitrogen oxygen sensor calibration devices 306 as described in any one of the first embodiments, where:

the adjacent two vent holes 111 of each two adjacent nitrogen oxygen sensor calibration devices 306 in the at least two nitrogen oxygen sensor calibration devices 306 are connected through an air pipe, the vent hole 111 at one end of the at least two connected nitrogen oxygen sensor calibration devices 306 is connected to the air distribution outlet of the air distribution module 304 through an air pipe, and the vent hole 111 at the other end is used for being connected with an external waste gas recovery device.

And the sensor power distribution module 302 is used for supplying power to the nitrogen oxygen sensor probe inserted into the accommodating groove 12 of the nitrogen oxygen sensor calibration device 306.

And the sensor calibration control module 303 is used for controlling the operation of the nitrogen-oxygen sensor probe, and receiving and processing signals sent by the sensor probe.

And the gas distribution module 304 is used for connecting an external gas source and distributing gas for the at least two nitrogen oxygen sensor calibration devices 306.

And the display module 305 is used for displaying the parameter information and the working state of each module.

Because the principle of the problems solved by the nitrogen-oxygen sensor batch calibration equipment is similar to that of the nitrogen-oxygen sensor calibration device described in the first embodiment, the implementation of the nitrogen-oxygen sensor batch calibration equipment can refer to the implementation of the nitrogen-oxygen sensor calibration device described in the first embodiment, and repeated parts are not described again.

In one embodiment, as shown in fig. 4 and 5, the batch calibration apparatus for nox sensors further includes a gas chamber strut 307, wherein the gas chamber strut 307 is disposed parallel to the gas chamber side casing 3011 of the calibration box 301; the at least two nitrogen-oxygen sensor calibration devices 306 are fixedly connected between the gas chamber support plate 307 and the gas chamber side shell 3011; the gas chamber side casing 3011 is provided with external through holes 30111 corresponding to the receiving slots 12 of the at least two nitroxide sensor calibration devices 306, and the notch of each receiving slot 12 is connected to one external through hole 30111.

Specifically, two ends of each nox sensor calibration apparatus 306 are respectively fixedly connected to the gas chamber support plate 307 and the gas chamber side housing 3011, and each accommodating groove 12 is communicated with an external through hole 30111. Preferably, the nitrogen-oxygen sensor calibration devices 306 are arranged in a row from bottom to top in the calibration box 301, and the air distribution module 304 is arranged at the lower side in the calibration box. When gas in the holding tank 12 is replaced, the standard gas generated by the gas distribution module 304 enters the holding tank 12 through the gas pipe from the bottom row of the nox sensor calibration devices 306, gradually flows through the holding tank 12 of each nox sensor calibration device 306, and then flows out from the top row of the nox sensor calibration devices 306. It can be understood that the air distribution module 304 has a larger weight and is arranged at the lower side in the calibration box 301, so that the structure is more stable.

In one embodiment, as shown in fig. 4 and 5, the sensor power distribution module 302 and the sensor calibration control module 303 are provided with the same number of composite interfaces 30112 as the number of the holding tanks 12 on the at least two nox sensor calibration devices 306 on the outer surface of the calibration box 301; each synthesis interface 30112 is used to connect to a wire harness connector of a single nitroxide sensor.

Specifically, the synthesis interface 30112 includes two power ports and two communication ports, which are respectively connected to the positive and negative electrodes of the power supply and a CAN (controller area network) bus of the control module, and each synthesis interface 30112 is configured to be connected to one nox sensor probe, so that each nox sensor probe corresponds to one test channel. Preferably, the synthesis interfaces 30112 are arranged in rows from bottom to top on the calibration box 301, each power line of each synthesis interface 30112 forms a power cable, and each communication line of each synthesis interface 30112 forms a communication cable, so as to facilitate wiring. Preferably, synthesis port 30112 is also provided on chamber side housing 3011 to facilitate the wire harness connections of the nitrogen oxygen sensor to interface with synthesis port 30112. For example, 34 nox sensor calibration devices 306 may be arranged in a row in the calibration box 301, correspondingly, 34 external through holes 30111 are arranged in a row on the chamber-side housing 3011, and 34 synthesis interfaces 30112 are arranged in a row on the chamber-side housing 3011 below the 34 external through holes 30111.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the utility model.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

Claims

1. The nitrogen-oxygen sensor calibration device is characterized by comprising a calibration table and an elastic gasket, wherein:

2. The calibration device of the nitrogen-oxygen sensor as claimed in claim 1, wherein the two vent holes comprise an air inlet hole and an air outlet hole, and the heights of the central axes of the air inlet hole and the air outlet hole from the bottom of the accommodating groove are different.

3. The calibration device of the nitrogen-oxygen sensor as claimed in claim 2, wherein the two vent holes are respectively disposed on two opposite sides of the accommodating groove.

4. The nitrogen-oxygen sensor calibration device as claimed in claim 1, wherein an air pipe connector communicated with the vent hole is further arranged on the outer surface of the calibration table body.

5. The calibration device of the nitrogen-oxygen sensor as claimed in claim 4, wherein the inner wall or the outer wall of the air pipe interface is provided with threads.

6. The nitrogen-oxygen sensor calibration device as claimed in claim 1, wherein the bottom of the calibration table body is provided with at least one screw hole.

7. The nitrogen-oxygen sensor calibration device as claimed in claim 6, wherein a mounting foot is provided at the bottom of the calibration platform body, and the at least one screw hole is provided on the mounting foot.

8. A nitrogen oxygen sensor batch calibration device is characterized by comprising a calibration box body, a sensor power distribution module, a sensor calibration control module, a gas distribution module, a display module and at least two nitrogen oxygen sensor calibration devices according to any one of claims 1 to 7, wherein the sensor power distribution module, the sensor calibration control module, the gas distribution module and the display module are arranged in the calibration box body, and the nitrogen oxygen sensor batch calibration device comprises:

9. The batch calibration apparatus for nitrogen-oxygen sensors as claimed in claim 8, further comprising a gas chamber support plate, wherein the gas chamber support plate is arranged parallel to the gas chamber side housing of the calibration box;

10. The batch calibration equipment of claim 9, wherein the sensor power distribution module and the sensor calibration control module are provided with the same number of synthetic interfaces as the number of the accommodating grooves on the at least two nitrogen oxygen sensor calibration devices on the outer surface of the calibration box; the synthetic interface is used for being connected with a wire harness connector of the nitrogen-oxygen sensor.