Passive wireless temperature sensor calibration device and method of use

Abstract

The application provides a passive wireless temperature sensor calibration device and a use method, which comprises a shielding calibration cabin, a high-low temperature box, a wireless reader, a radio frequency switch and a controller; the shielding calibration cabin is installed in the high-low temperature box, and a passive wireless temperature sensor is installed in the shielding calibration cabin; the controller is electrically connected with the shielding calibration cabin, the high-low temperature box, the wireless reader and the radio frequency switch; and the radio frequency switch is electrically connected with the shielding calibration cabin and the wireless reader. The passive wireless temperature sensor calibration device provided by the application is used for realizing the simultaneous batch calibration of multiple passive wireless temperature sensors in the same frequency band, and through wireless signal shielding, multiple groups of passive wireless temperature sensors can be directly calibrated and checked in a wireless reading mode, and a large number of passive wireless temperature sensors can be automatically batch calibrated, so that the calibration precision and speed of the passive wireless temperature sensor are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wireless sensing, in particular, to a passive wireless temperature sensor calibration device and a use method. BACKGROUND

[0002] Wireless temperature sensors, especially passive wireless temperature sensors, are applied to the fields of power monitoring, steel, oil, etc., and can meet the needs of long-term reliable online monitoring without replacing batteries, so that they can be maintained for a long time. However, the calibration of the current passive wireless temperature sensor still lags behind the industrialization requirements. Since the passive wireless sensor generally works in a frequency division multiplexing mode, too many sensors cannot exist in the same space, so the calibration generally adopts a wired calibration sensitive element method, but this method ignores the deviation caused by the wireless system, resulting in insufficient precision. If wireless calibration is adopted, it is difficult to calibrate a large number of sensors in batches, and the number and speed of calibration and checking have affected the batch application of passive wireless temperature sensors.

[0003] At present, most of the batch calibration platforms are still based on the wired calibration method. Compared with the wireless method, this method cannot effectively consider the system error and random error in the wireless reading process, and there is a certain gap between the final calibration effect and the actual use effect, so a calibration device capable of wireless batch calibration is needed.

[0004] Patent document CN102539018A provides a temperature sensor calibration device, which includes a constant-temperature sink, a constant-temperature chamber and an intelligent control structure. The device cannot ignore the deviation caused by the wireless system, resulting in insufficient precision.

[0005] Patent document CN102768085B discloses a high-precision temperature sensor calibration device, which includes a calibration block in which a high-precision standard temperature sensor is inserted, a calibration cylinder, an adiabatic block, a liquid passage, a sealed base plate, a vacuum cover, a data acquisition system, a high-precision constant-temperature bath and a vacuum system. The calibration block is placed in the calibration cylinder, and the calibration cylinder is sealed at both ends with the adiabatic block and fixed on the support on the upper part of the sealed base plate. The liquid passage is connected with the high-precision constant-temperature bath. The sealed base plate is connected with the vacuum system and the data acquisition system respectively. A vacuum cover is arranged on the sealed base plate. The patent cannot solve the problem of wireless batch calibration. SUMMARY

[0006] In view of the defects in the prior art, the purpose of the present application is to provide a passive wireless temperature sensor calibration device and a use method.

[0007] According to the passive wireless temperature sensor calibration device provided by the present application, the calibration device comprises a shielding calibration cabin, a high-low temperature box, a wireless reader, a radio frequency switch and a controller.

[0008] The shielding calibration cabin is installed in the high-low temperature box, and a passive wireless temperature sensor is installed in the shielding calibration cabin;

[0009] The controller is electrically connected with the shielding calibration cabin, the high-low temperature box, the wireless reader, and the radio frequency switch;

[0010] The radio frequency switch is electrically connected with the shielding calibration cabin and the wireless reader.

[0011] Preferably, the shielding calibration cabin is provided with a plurality of shielding calibration cabins.

[0012] Preferably, the shielding calibration cabin comprises a metal shielding cavity, a plate-shaped reading antenna, a wireless temperature sensor fixing plate, a calibration temperature sensor, and a calibration temperature sensor fixing plate.

[0013] One end of the metal shielding cavity is provided with a metal flat plate, and the edge of the metal flat plate extends out a side panel to one side;

[0014] The other end of the metal shielding cavity is provided with the wireless temperature sensor fixing plate, and the wireless temperature sensor fixing plate is connected with the side panel;

[0015] The metal flat plate is fixedly provided with the plate-shaped reading antenna on the side of the wireless temperature sensor fixing plate;

[0016] The metal shielding cavity is fixedly provided with the calibration temperature sensor fixing plate, and the calibration temperature sensor fixing plate is connected with the plate-shaped reading antenna and the wireless temperature sensor fixing plate;

[0017] The calibration temperature sensor is installed on the calibration temperature sensor fixing plate.

[0018] Preferably, the wireless temperature sensor fixing plate comprises a sensor fixing panel, a vertical plate, and a panel handle.

[0019] The sensor fixing panel is installed on the side panel, and the sensor fixing panel is matched with the edge of the side panel;

[0020] The sensor fixing panel extends out the vertical plate to one side of the metal shielding cavity, and the vertical plate is arranged in the metal shielding cavity;

[0021] The other side of the sensor fixing panel is provided with the panel handle;

[0022] The vertical plate is provided with a plurality of wireless sensor positioning holes;

[0023] The passive wireless temperature sensor is fixedly installed in the wireless sensor positioning hole.

[0024] Preferably, the calibration temperature sensor mounting plate is installed on the vertical plate;

[0025] The metal shielding cavity is provided with a cavity, and the calibration temperature sensor fixing plate and the vertical plate divide the cavity into a cavity groove and a square cavity.

[0026] The plate-shaped readout antenna is installed inside the square cavity.

[0027] Preferably, the metal plate is provided with an antenna interface hole and a calibration sensor interface hole;

[0028] The antenna interface hole connects to the square cavity;

[0029] The calibration sensor interface hole is connected to the cavity wire groove.

[0030] Preferably, an antenna interface is installed inside the antenna interface hole, and the outer diameter of the antenna interface is the same as the diameter of the antenna interface hole;

[0031] A calibration sensor interface is installed inside the calibration sensor interface hole, and the outer diameter of the sensor interface is the same as the diameter of the calibration sensor interface hole.

[0032] The antenna interface is connected to the plate-shaped readout antenna, and the calibration sensor interface is connected to the calibration temperature sensor.

[0033] Preferably, the calibration temperature sensor mounting plate is provided with calibration sensor mounting holes, and the calibration temperature sensor is fixedly mounted in the calibration sensor mounting holes;

[0034] The calibration sensor has multiple mounting holes, and each mounting hole is aligned with a positioning hole of the wireless sensor.

[0035] Preferably, the radio frequency switch is electrically connected to the antenna interface;

[0036] The controller is electrically connected to the calibration sensor interface.

[0037] Preferably, a method of using the passive wireless temperature sensor calibration device includes the following steps:

[0038] Step S1: Place multiple shielded calibration chambers inside the high and low temperature chamber. Passive wireless temperature sensors of the same frequency band can be placed in different shielded calibration chambers.

[0039] Step S2, the controller is respectively connected with the high-low temperature box, the wireless reader and the radio frequency switch through signal lines, the controller is connected with a plurality of the calibration sensors through compensation wires, the wireless reader is connected with the radio frequency switch through radio frequency feed lines, and the radio frequency switch is connected with a plurality of the antenna interfaces through radio frequency feed lines.

[0040] Step S3, the controller sets the required starting temperature calibration point, the terminal temperature calibration point, the temperature interval and the reading sequence of the shielded calibration cabin.

[0041] Step S4, the controller controls the high-low temperature box to reach the starting temperature calibration point.

[0042] Step S5, the controller reads the state of the high-low temperature box, and judges whether the current temperature is stable.

[0043] Step S6, when the temperature of the high-low temperature box reaches a stable state, the controller controls the radio frequency switch to switch to the corresponding sequence of the antenna interface, the controller controls the wireless reader to read the corresponding passive wireless temperature sensor through the corresponding plate-shaped reading antenna, and simultaneously reads and records the temperature value of the calibration temperature sensor at the corresponding position of the passive wireless temperature sensor.

[0044] Step S7, the controller repeats step 6 for a plurality of the shielded calibration cabins until all the shielded calibration cabins are sequentially read and recorded.

[0045] Step S8, the controller controls the high-low temperature box to reach the next temperature calibration point according to the set temperature interval, and repeats steps 5 to 7.

[0046] Step S9, repeat step 8 until the terminal temperature calibration point is reached, and end the calibration process.

[0047] Preferably, the length of the metal shielding cavity along the extension direction of the side panel is greater than the length of the length and width of the metal flat plate.

[0048] Preferably, the length and width of the plate-shaped reading antenna are smaller than the length and width of the square cavity.

[0049] Preferably, the calibration sensor fixing hole and the wireless sensor positioning hole are respectively provided with 6.

[0050] Compared with the prior art, the present application has the following beneficial effects:

[0051] The passive wireless temperature sensor calibration device provided by the application is used for realizing simultaneous batch calibration of multiple passive wireless temperature sensors in the same frequency band, and can directly calibrate and check multiple groups of passive wireless temperature sensors in a wireless reading mode through wireless signal shielding, can automatically batch calibrate a large number of passive wireless temperature sensors, and thus improves the calibration precision and speed of the passive wireless temperature sensor. BRIEF DESCRIPTION OF DRAWINGS

[0052] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0053] Figure 1 It is a structural schematic diagram of the passive wireless temperature sensor calibration device.

[0054] Figure 2 It is a structural schematic diagram of the shielding calibration cabin.

[0055] Figure 3 It is a sectional view of the shielding calibration cabin.

[0056] Figure 4 It is a schematic diagram of the shielding calibration cabin metal plate.

[0057] Figure 5 It is a top view of the wireless temperature sensor fixing plate.

[0058] Figure 6 It is a front view of the wireless temperature sensor fixing plate.

[0059] Figure 7 It is a top view of the calibration temperature sensor fixing plate.

[0060] In the drawings:

[0061]

[0062] DETAILED DESCRIPTION

[0063] The application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the concept of the application. These all belong to the protection scope of the application.

[0064] Example 1

[0065] As Figure 1 and Figure 2As shown in the figure, a passive wireless temperature sensor calibration device comprises: shielded calibration compartments 1, high-low temperature boxes 2, wireless readers 3, radio frequency switches 4, and controllers 5; the shielded calibration compartments 1 are installed in the high-low temperature boxes 2, and multiple shielded calibration compartments 1 are arranged. Passive wireless temperature sensors are installed in the shielded calibration compartments 1, the controller 5 is electrically connected to the shielded calibration compartments 1, the high-low temperature boxes 2, the wireless readers 3, and the radio frequency switches 4, the radio frequency switches 4 are electrically connected to the shielded calibration compartments 1 and the wireless readers 3. The radio frequency switches 4 are electrically connected to the antenna interfaces 13, and the controller 5 is electrically connected to the calibration sensor interfaces 17.

[0066] As shown in the figure, Figure 3 and Figure 4 As shown in the figure, the shielded calibration compartment 1 comprises: a metal shielding cavity 11, a plate-shaped reading antenna 12, a wireless temperature sensor fixing plate 14, a calibration temperature sensor 15, and a calibration temperature sensor fixing plate 16; one end of the metal shielding cavity 11 is arranged as a metal flat plate, the edge of the metal flat plate extends to one side to form a side panel, the other end of the metal shielding cavity 11 is installed with the wireless temperature sensor fixing plate 14, the wireless temperature sensor fixing plate 14 is connected to the side panel, the metal flat plate is fixedly installed with the plate-shaped reading antenna 12 on the side of the wireless temperature sensor fixing plate 14, the calibration temperature sensor fixing plate 16 is fixedly installed in the metal shielding cavity 11, the calibration temperature sensor fixing plate 16 is connected to the plate-shaped reading antenna 12 and the wireless temperature sensor fixing plate 14, and the calibration temperature sensor 15 is installed on the calibration temperature sensor fixing plate 16. A cavity is arranged in the metal shielding cavity 11, and the calibration temperature sensor fixing plate 16 and the vertical plate divide the cavity into a cavity linear slot 111 and a square cavity 112, and the plate-shaped reading antenna 12 is installed in the square cavity 112. An antenna interface hole 113 and a calibration sensor interface hole 114 are arranged on the metal flat plate, the antenna interface hole 113 communicates with the square cavity 112, and the calibration sensor interface hole 114 communicates with the cavity linear slot 111. The antenna interface 13 is installed in the antenna interface hole 113, the outer diameter of the antenna interface 13 is the same as the hole diameter of the antenna interface hole 113, the calibration sensor interface 17 is installed in the calibration sensor interface hole 114, the outer diameter of the calibration sensor interface 17 is the same as the hole diameter of the calibration sensor interface hole 114, the antenna interface 13 is connected to the plate-shaped reading antenna 12, and the calibration sensor interface 17 is connected to the calibration temperature sensor 15.

[0067] As shown in the figure, Figure 5 to Figure 7As shown, the wireless temperature sensor fixing plate 14 includes a sensor fixing panel 142, a vertical plate, and a panel handle 143; the sensor fixing panel 142 is installed on the side panel, the sensor fixing panel 142 is in line with the edge of the side panel, the sensor fixing panel 142 extends a vertical plate towards the side of the metal shielding cavity 11, the vertical plate is arranged in the metal shielding cavity 11, the other side of the sensor fixing panel 142 is installed with the panel handle 143, the vertical plate is provided with a wireless sensor positioning hole 141, a plurality of wireless sensor positioning holes 141 are provided, and the wireless sensor positioning hole 141 is fixedly installed with a passive wireless temperature sensor. The vertical plate is installed with a calibrated temperature sensor fixing plate 16. The calibrated temperature sensor fixing plate 16 is provided with a calibrated sensor fixing hole 161, the calibrated temperature sensor 15 is fixedly installed in the calibrated sensor fixing hole 161, a plurality of calibrated sensor fixing holes 161 are provided, and the calibrated sensor fixing hole 161 is aligned with the wireless sensor positioning hole 141 one by one.

[0068] The use method of the passive wireless temperature sensor calibration device includes the following steps: step S1, a plurality of shielding calibration compartments 1 are placed in the high-low temperature box 2, and different shielding calibration compartments 1 can be placed with passive wireless temperature sensors of the same frequency band; step S2, the controller 5 is electrically connected with the high-low temperature box 2, the wireless reader 3, and the radio frequency switch 4 through signal lines, the controller 5 is electrically connected with a plurality of calibration sensor interfaces 17 through compensation wires, the wireless reader 3 is electrically connected with the radio frequency switch 4 through radio frequency feed lines, and the radio frequency switch 4 is electrically connected with a plurality of antenna interfaces 13 through radio frequency feed lines; step S3, the controller 5 sets the required starting temperature calibration point, the terminal temperature calibration point, the temperature interval, and the reading sequence of the shielding calibration compartment 1; step S4, the controller 5 controls the high-low temperature box 2 to reach the starting temperature calibration point; step S5, the controller 5 reads the state of the high-low temperature box 2 and judges whether the current temperature is stable; step S6, when the temperature of the high-low temperature box 2 reaches a stable state, the controller 5 controls the radio frequency switch 4 to switch to the corresponding sequence of the antenna interface 13, the controller 5 controls the wireless reader 3 to read the corresponding passive wireless temperature sensor through the corresponding plate-shaped reading antenna 12, and simultaneously reads and records the temperature value of the calibrated temperature sensor 15 at the corresponding position of the passive wireless temperature sensor; step S7, the controller 5 repeats step 6 for a plurality of shielding calibration compartments 1 until all the shielding calibration compartments 1 are read and recorded in sequence; step S8, the controller 5 controls the high-low temperature box 2 to reach the next temperature calibration point at the set temperature interval, and repeats steps 5 to 7; step S9, step 8 is repeated until the terminal temperature calibration point is reached, and the calibration process is ended.

[0069] Example 2

[0070] Embodiment 2 is a preferred example of Embodiment 1.

[0071] As shown in Figure 1 to Figure 4 The embodiment includes a shielded calibration compartment 1, a high-low temperature box 2, a wireless reader 3, a radio frequency switch 4, and a controller 5. The shielded calibration compartment 1 is composed of a metal shielding cavity 11, a plate-shaped reading antenna 12, an antenna interface 13, a wireless temperature sensor fixing plate 14, a calibration temperature sensor 15, a calibration temperature sensor fixing plate 16, and a calibration sensor interface 17.

[0072] One or more shielded calibration compartments 1 can be placed in a high-low temperature box 2. The controller 5 is electrically connected to the high-low temperature box 2, the wireless reader 3, and the radio frequency switch 4 through signal lines, respectively. The controller 5 is electrically connected to the calibration sensor interface 17 of the multiple shielded calibration compartments 1 through a compensation lead. The wireless reader 3 is electrically connected to the radio frequency switch 4 through a radio frequency feed line. The radio frequency switch 4 is electrically connected to the antenna interface 13 of the multiple shielded calibration compartments 1 through a radio frequency feed line. The plate-shaped reading antenna 12 is mechanically and electrically connected to the antenna interface 13. The plate-shaped reading antenna 12 is mechanically connected to the metal shielding cavity 11 through high-temperature glue or bolts. The length and width of the plate-shaped reading antenna 12 are smaller than the length and width of the square cavity 112.

[0073] As shown in Figure 5 to Figure 7 The wireless temperature sensor fixing plate 14 includes wireless sensor positioning holes 141, and the number of the wireless sensor positioning holes 141 is six. The wireless temperature sensor fixing plate 14 further includes a sensor fixing panel 142 and a panel handle 143. The wireless temperature sensor fixing plate 14 is mechanically connected to the metal shielding cavity 11. The calibration temperature sensor fixing plate 16 has calibration sensor fixing holes 161, and the number of the calibration sensor fixing holes 161 is six. The positions of the calibration sensor fixing holes 161 are aligned with the positions of the wireless sensor positioning holes 141. The calibration temperature sensor 15 is mechanically connected to the calibration sensor fixing holes 161. The calibration temperature sensor 15 is mechanically and electrically connected to the calibration sensor interface 17 through a compensation lead. The calibration temperature sensor fixing plate 16 is mechanically connected to the metal shielding cavity 11 through bolts.

[0074] The metal shielding cavity 11 has a cavity slot 111 inside. One end of the metal shielding cavity 11 has a square cavity 112. The depth of the metal shielding cavity 11 is greater than its length and width. The length and width of the metal shielding cavity 11 are consistent with the length and width of the sensor fixing panel 142. The metal flat plate of the metal shielding cavity 11 is provided with an antenna interface hole 113 and a calibration sensor interface hole 114. The hole diameter of the antenna interface hole 113 is the same as the outer diameter of the antenna interface 13. The hole diameter of the calibration sensor interface hole 114 is the same as the outer diameter of the calibration sensor interface 17.

[0075] The specific implementation steps of batch temperature calibration of the passive wireless temperature sensor are as follows: step T1, according to the number of calibrated sensors required, a corresponding number of shielding calibration compartments 1 are placed in the high-low temperature box 2, and the same frequency band passive wireless temperature sensors can be placed in different shielding calibration compartments 1; step T2, the controller 5 is electrically connected with the high-low temperature box 2, the wireless reader 3 and the radio frequency switch 4 through signal lines respectively, the controller 5 is electrically connected with the calibration sensor interfaces 17 of the plurality of shielding calibration compartments 1 through the compensation wires, the wireless reader 3 is electrically connected with the radio frequency switch 4 through the radio frequency feed lines, and the radio frequency switch 4 is electrically connected with the antenna interfaces 13 of the plurality of shielding calibration compartments 1 through the radio frequency feed lines. Step T3, the controller 5 sets the required starting temperature calibration point, the termination temperature calibration point, the temperature interval and the reading sequence of the shielding calibration compartment 1; step T4, the controller 5 controls the high-low temperature box 2 to reach the starting temperature calibration point; step T5, the controller 5 reads the state of the high-low temperature box 2 to determine whether the current temperature is stable; step T6, when the current temperature reaches a stable state, the controller 5 controls the radio frequency switch 4 to switch to the antenna interface 13 of the shielding calibration compartment 1 in the corresponding sequence, the controller 5 controls the wireless reader 3 to read the passive wireless temperature sensor in the corresponding shielding calibration compartment 1 through the plate-shaped reading antenna 12 of the corresponding shielding calibration compartment 1, and simultaneously reads and records the temperature value of the calibration temperature sensor 15 at the corresponding position; step T7, the controller 5 repeats step T6 for the plurality of shielding calibration compartments 1 until reading and recording are completed for all the shielding calibration compartments 1 in sequence; step T8, the controller 5 controls the high-low temperature box 2 to reach the next temperature calibration point at the set temperature interval, and repeats steps T5 to T7; step T9, step T8 is repeated until the termination temperature calibration point is reached, and the calibration process is ended.

[0076] Those skilled in the art know that, in addition to implementing the system provided by the present application and each device, module and unit thereof in the form of pure computer readable program code, the same functions can also be achieved by logically programming the method steps to make the system provided by the present application and each device, module and unit thereof in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers and embedded microcontrollers. Therefore, the system provided by the present application and each device, module and unit thereof can be considered as a hardware component, and the devices, modules and units included therein for achieving various functions can also be considered as structures within the hardware component. The devices, modules and units for achieving various functions can also be considered as both software modules implementing methods and structures within hardware components.

[0077] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0078] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which do not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict, provided that they do not conflict.

Claims

1. A passive wireless temperature sensor calibration device, characterized in that, The application relates to a shielded calibration cabin, a high-low temperature box, a wireless reader, a radio frequency switch and a controller. The shielded calibration cabin is installed in the high-low temperature box. The controller is electrically connected with the shielded calibration cabin, the high-low temperature box, the wireless reader and the radio frequency switch. The radio frequency switch is electrically connected with the shielded calibration cabin and the wireless reader. The shielded calibration cabin comprises a metal shielding cavity, a plate-shaped reading antenna, a wireless temperature sensor fixing plate, a calibration temperature sensor and a calibration temperature sensor fixing plate. One end of the metal shielding cavity is provided with a metal flat plate, and a side plate extends from the edge of the metal flat plate to one side. The other end of the metal shielding cavity is provided with the wireless temperature sensor fixing plate, and the wireless temperature sensor fixing plate is connected with the side plate. The plate-shaped reading antenna is fixedly installed on one side of the wireless temperature sensor fixing plate. The calibration temperature sensor fixing plate is fixedly installed in the metal shielding cavity and is connected with the plate-shaped reading antenna and the wireless temperature sensor fixing plate. The calibration temperature sensor is installed on the calibration temperature sensor fixing plate. The wireless temperature sensor fixing plate comprises a sensor fixing panel, a vertical plate and a panel handle. The sensor fixing panel is installed on the side plate and is matched with the edge of the side plate. The sensor fixing panel extends a vertical plate towards one side of the metal shielding cavity, and the vertical plate is arranged in the metal shielding cavity. The other side of the sensor fixing panel is provided with the panel handle. A wireless sensor positioning hole is arranged on the vertical plate, and a plurality of wireless sensor positioning holes are arranged. The wireless sensor positioning hole is fixedly installed with the passive wireless temperature sensor. The shielded calibration cabin is provided with a plurality of shielded calibration cabins.

2. The passive wireless temperature sensor calibration device of claim 1, wherein: The calibration temperature sensor fixing plate is installed on the vertical plate.

3. The passive wireless temperature sensor calibration device of claim 1, wherein: A cavity is arranged in the metal shielding cavity, and the calibration temperature sensor fixing plate and the vertical plate divide the cavity into a cavity linear groove and a square cavity. The plate-shaped reading antenna is installed in the square cavity. An antenna interface hole and a calibration sensor interface hole are arranged on the metal flat plate.

4. The passive wireless temperature sensor calibration device of claim 3, wherein: The antenna interface hole is communicated with the square cavity. ​ The calibration sensor interface hole (114) communicates with the cavity slot (111).

5. The passive wireless temperature sensor calibration device of claim 4, wherein: The antenna interface (13) is installed in the antenna interface hole (113), and an outer diameter of the antenna interface (13) is the same as a hole diameter of the antenna interface hole (113). The calibration sensor interface (17) is installed in the calibration sensor interface hole (114), and an outer diameter of the calibration sensor interface (17) is the same as a hole diameter of the calibration sensor interface hole (114). The antenna interface (13) is connected to the plate-shaped reading antenna (12), and the calibration sensor interface (17) is connected to the calibration temperature sensor (15).

6. The passive wireless temperature sensor calibration device of claim 1, wherein: The calibration temperature sensor fixing plate (16) is provided with a calibration sensor fixing hole (161), and the calibration temperature sensor (15) is fixedly installed in the calibration sensor fixing hole (161). A plurality of calibration sensor fixing holes (161) are provided, and the calibration sensor fixing holes (161) are one-to-one aligned with the wireless sensor positioning holes (141).

7. The passive wireless temperature sensor calibration device of claim 5, wherein: The radio frequency switch (4) is electrically connected to the antenna interface (13). The controller (5) is electrically connected to the calibration sensor interface (17).

8. A method of using the passive wireless temperature sensor calibration device of claim 7, wherein, The method comprises the following steps: Step S1, a plurality of shielding calibration compartments (1) are placed in the high-low temperature box (2), and shielding calibration compartments (1) of different frequencies can be placed in the same frequency band. Step S2, the controller (5) is electrically connected to the high-low temperature box (2), the wireless reader (3) and the radio frequency switch (4) through signal lines, the controller (5) is electrically connected to a plurality of calibration sensor interfaces (17) through compensation wires, the wireless reader (3) is electrically connected to the radio frequency switch (4) through radio frequency feed lines, and the radio frequency switch (4) is electrically connected to a plurality of antenna interfaces (13) through radio frequency feed lines. Step S3, the controller (5) sets the required starting temperature calibration point, the terminal temperature calibration point, the temperature interval and the reading sequence of the shielding calibration compartment (1). Step S4, the controller (5) controls the high-low temperature box (2) to reach the starting temperature calibration point. Step S5, the controller (5) reads the state of the high-low temperature box (2) and judges whether the current temperature is stable. Step S6, when the temperature of the high-low temperature box (2) reaches a stable state, the controller (5) controls the radio frequency switch (4) to switch to the corresponding sequence of the antenna interface (13), the controller (5) controls the wireless reader (3) to read the corresponding passive wireless temperature sensor through the corresponding plate-shaped reading antenna (12), and simultaneously reads the temperature value of the calibration temperature sensor (15) at the corresponding position of the passive wireless temperature sensor and records the temperature value. Step S7, the controller (5) repeats step 6 for a plurality of shielding calibration compartments (1) until reading and recording are completed for all the shielding calibration compartments (1) in sequence. Step S8, the controller (5) controls the high-low temperature box (2) to reach the next temperature calibration point at the set temperature interval, and repeats steps 5 to 7. Step S9, repeat step 8 until the end temperature calibration point is reached, and end the calibration process.

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