CN216117833U

CN216117833U - Detection apparatus for low frequency magnetic field noise immunity convenient to maintain

Info

Publication number: CN216117833U
Application number: CN202121986976.2U
Authority: CN
Inventors: 裴菊静; 周优为; 李煜; 高青
Original assignee: Xi'an Sushi Guangbo Environmental Reliability Laboratory Co ltd
Current assignee: Xi'an Sushi Guangbo Environmental Reliability Laboratory Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-03-22
Anticipated expiration: 2031-08-23

Abstract

The utility model provides a detection device of low-frequency magnetic field immunity convenient to maintain, which comprises a base plate, an electromagnetic wave chamber, a partition plate, a switch door, an observation window, a video monitor, a test probe, a support column, a workbench, a computer, a controller, a drive switch, a detachable fixing frame structure, a movable maintenance rack structure, a chamber, an intelligent field intensity meter and a filter, wherein the electromagnetic wave chamber is integrally arranged at the upper end of the base plate, and the chamber is arranged in the electromagnetic wave chamber; the partition plate is embedded in the middle left side of the inner wall of the chamber cavity; the door opening and closing hinge is arranged on the middle right side of the rear side inside the electromagnetic wave chamber; the observation window is embedded above the inside of the opening and closing door. The utility model has the beneficial effects that: through the setting of dismouting mount structure, be convenient for press from both sides the dress fixed to the equipment that needs detect to convenient detect the use to the check out test set of equidimension not.

Description

Detection apparatus for low frequency magnetic field noise immunity convenient to maintain

Technical Field

The utility model belongs to the technical field of magnetic field detection, and particularly relates to a low-frequency magnetic field immunity detection device convenient to maintain.

Background

The low-frequency magnetic field immunity test system is used for testing the magnetic field immunity of automobile electronic products, the low-frequency magnetic field immunity test system is specially used for performing immunity tests, and the magnetic field and low-frequency tests cover almost all test methods applied to automobile, military and aerospace test standards.

However, the conventional detection device for detecting the noise immunity of the low-frequency magnetic field has the problems that the device to be detected is inconvenient to fixedly install and use, the device which is matched with the detection device is inconvenient to move, and the device is inconvenient to maintain and use.

Therefore, it is necessary to provide a low-frequency magnetic field immunity detection device which is convenient to maintain.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a low-frequency magnetic field immunity detection device convenient to maintain, so as to solve the problems that the conventional low-frequency magnetic field immunity detection device is inconvenient to fixedly install and use detected equipment, move a device which is not convenient to cooperate with the detected equipment and maintain and use the device. A detection device of low-frequency magnetic field immunity convenient to maintain comprises a base plate, an electromagnetic wave chamber, a partition plate, a switch door, an observation window, a video monitor, a test probe, a support column, a workbench, a computer, a controller, a drive switch, a detachable fixing frame structure, a movable maintenance rack structure, a chamber, an intelligent field intensity meter and a filter, wherein the electromagnetic wave chamber is integrally arranged at the upper end of the base plate, and the chamber is formed in the electromagnetic wave chamber; the partition plate is embedded in the middle left side of the inner wall of the chamber cavity; the door opening and closing hinge is arranged on the middle right side of the rear side inside the electromagnetic wave chamber; the observation window is embedded above the inside of the opening and closing door; the video monitor bolt is arranged on the right side of the upper part of the inner wall of the chamber cavity; the test probe bolt is arranged on the right side of the lower part of the inner wall of the chamber cavity; the support columns are respectively welded around the lower end of the workbench; the workbench bolt is arranged in the middle of the front end of the electromagnetic wave chamber; the computer, the intelligent field intensity meter and the filter are respectively arranged on the upper surface of the workbench; the controller bolt is arranged on the middle left side of the upper part of the front end of the electromagnetic wave chamber, and the front end of the controller is electrically connected with a driving switch; the dismounting fixing frame structure is arranged on the middle right side of the upper surface of the base plate; the movable maintenance rack structure is arranged on the left side of the upper surface of the base plate.

Preferably, the detachable fixing frame structure comprises a vertical plate, a side support plate, a clamping electric cylinder, a movable shaft, a movable plate and an adjusting plate frame structure, wherein the vertical plate is mounted in the middle of the right side of the upper surface of the base plate through a bolt; the side supporting plates are respectively welded at the front part and the rear part of the left end of the vertical plate, and a clamping electric cylinder is installed on a left bolt on the outer wall of the side supporting plate; the movable shaft is movably embedded in the clamping electric cylinder, and a movable plate is arranged on the inner side of the movable shaft through a bolt; the adjusting plate frame structure is arranged on the outer side of the moving plate.

Preferably, the adjusting plate frame structure comprises a movable sleeve, a movable cavity, a connecting groove, a clamping guard plate, a tension spring and a connecting head, wherein the movable cavity is formed in the middle of the inner part of the movable sleeve; the connecting groove is formed in the rear side of the inner part of the movable sleeve, and the movable sleeve and the connecting groove are sleeved on the periphery of the outer wall of the moving plate respectively; the clamping guard plate is welded at the upper end of the movable sleeve; the upper part and the lower part of the tension spring are respectively inserted into connecting heads; the connector respectively threaded connection in the inside top of spread groove and the inside outside of movable plate.

Preferably, the movable maintenance rack structure comprises a supporting plate, a fastening plate, a contraction electric cylinder, a signal generator, a power amplifier, an assembly box, an N-type coaxial connector and a movable maintenance base structure, wherein the supporting plate is respectively installed on the front part and the rear part of the lower end of the fastening plate through bolts, and the contraction electric cylinder is installed on the middle part of the inner wall of the fastening plate through bolts; the signal generator and the power amplifier are respectively arranged on the left side and the right side of the inner side of the fastening plate; the assembling box is mounted on an output shaft of the electric shrinkage cylinder through a bolt, and an N-type coaxial connector is mounted on the right side of the inside of the assembling box through a bolt; the N-type coaxial connector is inserted into the middle part inside the partition plate; the movable maintenance base structure is arranged at the lower end of the fastening plate.

Preferably, the movable maintenance base structure comprises a movable support plate, a first assembly plate, a stabilizing column, a second assembly plate, a threaded rod and a movable motor, wherein fastening plates are respectively mounted on the front part and the rear part of the upper end of the movable support plate through bolts; the first assembling plate bolt is arranged on the right side of the lower end of the movable support plate; the stabilizing column is embedded in the middle left side of the lower part of the inner wall of the chamber cavity, and is inserted into the first assembling plate; the second assembling plate bolt is arranged on the left side of the lower end of the movable support plate; one end of the threaded rod is connected with a coupler of an output shaft of the mobile motor, the other end of the threaded rod is installed in front of the left side of the lower portion of the inner wall of the chamber cavity through a bearing, and meanwhile the threaded rod is in threaded connection with the second assembly plate.

Preferably, the middle part of the left side of the front part of the electromagnetic wave chamber is provided with a through hole, and the through hole corresponds to the support plate.

Preferably, the side supporting plate supports the clamping electric cylinder, and the clamping electric cylinder is matched with the movable shaft to support the moving plate.

Preferably, the moving plate is made of a steel plate, and the moving plate is in a cross shape.

Preferably, four movable sleeves are arranged, and the movable sleeves are matched with the moving plate.

Preferably, the clamping protection plate is matched with the movable sleeve to be in an inverted L shape, and the lower surface of the clamping protection plate is provided with straight anti-skidding lines.

Preferably, the tension spring is respectively connected with the movable sleeve and the movable plate.

Preferably, two support plates are arranged at the lower end of the fastening plate, and are assembled into a U shape.

Preferably, the shrinkage electric cylinder is matched with the assembling box to support the N-type coaxial connector.

Preferably, the first assembling plate and the second assembling plate are respectively arranged in an L shape and respectively support the first assembling plate.

Preferably, the rear end of the threaded rod is supported by a moving motor.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the utility model, the arrangement of the vertical plate and the side supporting plate can be matched with other structures for supporting, thereby realizing the clamping work.

2. In the utility model, the clamping electric cylinder, the movable shaft and the movable plate are arranged, so that equipment needing to be detected can be clamped and fixed conveniently, and detection equipment with different sizes can be detected and used conveniently.

3. In the utility model, the arrangement of the movable sleeve and the clamping protection plate is convenient for fixing the detected equipment for use again when clamping.

4. In the utility model, the movable cavity and the connecting groove are arranged, so that the movable cavity and the connecting groove can be conveniently matched with the movable sleeve to move and can be used along with the movable sleeve.

5. In the utility model, the tension spring and the connector are arranged, and the elastic force of the tension spring and the connector can drive the movable sleeve to move and use along with the movable sleeve.

6. In the utility model, the arrangement of the supporting plate and the fastening plate can be matched with other structures for installation and protection and use.

7. According to the utility model, the arrangement of the shrinkage electric cylinder, the assembling box and the N-type coaxial connector is convenient for driving the N-type coaxial connector to move so as to perform shrinkage maintenance.

8. In the utility model, the arrangement of the movable support plate, the first assembly plate and the second assembly plate is convenient for being matched with the movable support plate for supporting and using.

9. In the utility model, the threaded rod and the mobile motor can drive the mobile support plate and the signal generator and the power amplifier above the mobile support plate to move out of the chamber, thereby facilitating the work of maintenance.

10. According to the utility model, the first assembling plate and the stabilizing column are arranged, so that the first assembling plate and the stabilizing column can be stably matched with the movable support plate for supporting and moving use.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural diagram of the detachable fixing frame structure of the present invention.

Fig. 3 is a schematic structural view of the structure of the adjusting plate frame of the present invention.

Fig. 4 is a schematic structural diagram of a mobile maintenance rack structure of the present invention.

Fig. 5 is a schematic structural view of the mobile maintenance base structure of the present invention.

Fig. 6 is a schematic electrical wiring diagram of the present invention.

In the figure:

1. a base plate; 2. an electromagnetic wave chamber; 3. a partition plate; 4. opening and closing the door; 5. an observation window; 6. a video monitor; 7. testing the probe; 8. a support pillar; 9. a work table; 10. a computer; 11. a controller; 12. a drive switch; 13. disassembling and assembling the fixed frame structure; 131. a vertical plate; 132. a side support plate; 133. clamping an electric cylinder; 134. a movable shaft; 135. moving the plate; 136. adjusting the plate frame structure; 1361. a movable sleeve; 1362. a movable cavity; 1363. connecting grooves; 1364. clamping a guard plate; 1365. a tension spring; 1366. a connector; 14. moving the maintenance frame structure; 141. a support plate; 142. a fastening plate; 143. contracting the electric cylinder; 144. a signal generator; 145. a power amplifier; 146. assembling a box; 147. an N-type coaxial connector; 148. moving the maintenance base structure; 1481. moving the support plate; 1482. a first assembly plate; 1483. a stabilization post; 1484. a second assembly plate; 1485. a threaded rod; 1486. a moving motor; 15. a chamber cavity; 16. an intelligent field intensity meter; 17. and a filter.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

example (b):

as shown in fig. 1, a device for detecting immunity of a low-frequency magnetic field, which is convenient for maintenance, includes a base plate 1, an electromagnetic wave chamber 2, a partition plate 3, a switch door 4, an observation window 5, a video monitor 6, a test probe 7, a support column 8, a workbench 9, a computer 10, a controller 11, a driving switch 12, a detachable fixing frame structure 13, a movable maintenance rack structure 14, a chamber cavity 15, an intelligent field intensity meter 16 and a filter 17, wherein the electromagnetic wave chamber 2 is integrally arranged at the upper end of the base plate 1, and the chamber cavity 15 is arranged in the electromagnetic wave chamber 2; the partition plate 3 is embedded in the middle left side of the inner wall of the chamber cavity 15; the switch door 4 is hinged on the middle right side of the rear side inside the electromagnetic wave chamber 2; the observation window 5 is embedded above the inside of the switch door 4; in the working process, the detection equipment is placed or taken in the electromagnetic wave chamber 2 by opening and closing the opening and closing door 4, and meanwhile, the detection equipment is observed and used through the observation window 5; the video monitor 6 is mounted on the right side of the upper part of the inner wall of the chamber cavity 15 through bolts; the test probe 7 is mounted on the right side of the lower part of the inner wall of the chamber 15 through a bolt; the support columns 8 are respectively welded around the lower end of the workbench 9; the workbench 9 is mounted in the middle of the front end of the electromagnetic wave chamber 2 through bolts; the computer 10, the intelligent field intensity meter 16 and the filter 17 are respectively arranged on the upper surface of the workbench 9, and the workbench 9 is supported by the supporting column 8 while the workbench 9 is arranged on other equipment for working use; the controller 11 is installed on the middle left side of the upper part of the front end of the electromagnetic wave chamber 2 through bolts, and the front end of the controller 11 is electrically connected with a driving switch 12; the dismounting fixing frame structure 13 is arranged on the middle right side of the upper surface of the base plate 1; the mobile maintenance frame structure 14 is mounted on the left side of the upper surface of the base plate 1.

As shown in fig. 2, in the above embodiment, specifically, the detachable fixing frame structure 13 includes a vertical plate 131, a side support plate 132, a clamping electric cylinder 133, a movable shaft 134, a movable plate 135 and an adjusting plate frame structure 136, where the vertical plate 131 is bolted to the middle of the right side of the upper surface of the base plate 1; the side supporting plates 132 are respectively welded at the front and rear parts of the left end of the vertical plate 131, and the clamping electric cylinder 133 is installed on the left bolt on the outer wall of the side supporting plate 132; the movable shaft 134 is movably embedded in the clamping electric cylinder 133, and a movable plate 135 is mounted on the inner side of the movable shaft 134 through bolts; the clamping electric cylinder 133 works to drive the movable shaft 134 to move so as to drive the movable plate 135 to move and to be clamped by matching with detection equipment; the adjustment ledge structure 136 is mounted on the outside of the moving plate 135.

As shown in fig. 3, in the above embodiment, specifically, the adjusting plate frame structure 136 includes a movable sleeve 1361, a movable cavity 1362, a connecting groove 1363, a clamping plate 1364, a tension spring 1365 and a connecting head 1366, and the movable cavity 1362 is disposed in the middle of the inside of the movable sleeve 1361; the connecting groove 1363 is arranged at the rear side of the interior of the movable sleeve 1361, and the movable sleeve 1361 and the connecting groove 1363 are respectively sleeved on the periphery of the outer wall of the moving plate 135; the movable sleeve 1361 moves up and down on the moving plate 135 and clamps the detected equipment in cooperation with the guard plate 1364; the clamping protection plate 1364 is welded at the upper end of the movable sleeve 1361; the upper part and the lower part of the tension spring 1365 are respectively inserted into the connectors 1366; the clamp protection plate 1364 is driven to move and clamp in the moving process of the movable sleeve 1361; the connecting head 1366 is respectively in threaded connection with the upper part inside the connecting groove 1363 and the outer side inside the moving plate 135; during operation, the elastic force of the tension spring 1365 drives the movable sleeve 1361 to move on the moving plate 135.

As shown in fig. 4, in the above embodiment, specifically, the mobile maintenance rack structure 14 includes a supporting plate 141, a fastening plate 142, a contracting electric cylinder 143, a signal generator 144, a power amplifier 145, an assembling box 146, an N-type coaxial connector 147 and a mobile maintenance base structure 148, the supporting plate 141 is respectively bolted to the front and rear portions of the lower end of the fastening plate 142, and the contracting electric cylinder 143 is bolted to the middle portion of the inner wall of the fastening plate 142; when the telescopic electric cylinder 143 is contracted, the assembling box 146 and the N-shaped coaxial connector 147 are driven to move and retract to reach the inner side of the fastening plate 142 for storage; the signal generator 144 and the power amplifier 145 are respectively arranged at the left and right sides of the inner side of the fastening plate 142; the assembling box 146 is bolted on the output shaft of the electric contracting cylinder 143, and an N-shaped coaxial joint 147 is bolted on the right side in the assembling box 146; the N-type coaxial connector 147 is inserted into the middle part of the inner part of the clapboard 3; the mobile maintenance base structure 148 is mounted to the lower end of the fastening plate 142.

As shown in fig. 5, in the above embodiment, specifically, the movable maintenance base structure 148 includes a movable support plate 1481, a first assembly plate 1482, a stabilizing column 1483, a second assembly plate 1484, a threaded rod 1485 and a moving motor 1486, and the front and rear portions of the upper end of the movable support plate 1481 are respectively bolted with fastening plates 142; the first assembling plate 1482 is mounted on the right side of the lower end of the movable support plate 1481 through bolts; the first assembling plate 1482 is stably used in sliding on the stabilizing columns 1483 during the movement of the moving support plate 1481; the stabilizing column 1483 is embedded in the middle left side of the lower part of the inner wall of the chamber 15, and the stabilizing column 1483 is inserted into the first assembling plate 1482; the second assembling plate 1484 is mounted on the left side of the lower end of the movable support plate 1481 through bolts; one end of the threaded rod 1485 is connected with a coupler of an output shaft of a moving motor 1486, the other end of the threaded rod 1485 is mounted in front of the left side of the lower part of the inner wall of the chamber cavity 15 through a bearing, and meanwhile, the threaded rod 1485 is in threaded connection with a second assembly plate 1484; in the working process, the moving motor 1486 drives the threaded rod 1485 to rotate, and meanwhile, the rotating threaded rod 1485 drives the moving support plate 1481 to move back and forth.

In the above embodiment, specifically, the controller 11 employs a PLC of model FX 2N-48.

In the above embodiment, specifically, the clamping electric cylinder 133 is an electric cylinder of a type TYS 001.

In the above embodiment, specifically, the contracting electric cylinder 143 is a TYS001 electric cylinder.

In the above embodiment, the moving motor 1486 is a 5IK120RGU-CF motor.

In the above embodiment, specifically, the driving switch 12 is electrically connected to the controller 11, the clamping electric cylinder 133 is electrically connected to the controller 11, the contracting electric cylinder 143 is electrically connected to the controller 11, and the moving motor 1486 is electrically connected to the controller 11.

Principle of operation

The working principle of the utility model is as follows: in the using process, the detection device is placed between the moving plate 135 and the moving plate 135, then the clamping electric cylinder 133 is driven to be matched with the moving plate 135 on the moving shaft 134 to clamp the detected device, meanwhile, the movable sleeve 1361 and the clamping protection plate 1364 are matched with the elastic force of the tension spring 1365 to move, so that the detection device is clamped and fixed again, after the fixation is completed, signals are processed through the signal generator 144 and the power amplifier 145 and are sent into the chamber cavity 15 from the N-type coaxial connector 147 to work the detection device, then the video monitor 6 and the test probe 7 are respectively matched with the intelligent field intensity meter 16, the filter 17 and the computer 10 to detect the immunity, when maintenance is needed, the contracting electric cylinder 143 is actuated to drive the N-type coaxial connector 147 to retract to the inner side of the supporting plate 141, then the moving motor 1486 is driven to rotate in coordination with the threaded rod 1485 to drive the second assembling plate 1484, the moving support plate 1481, The first assembling plate 1482, the support plate 141 and the fastening plate 142 move back and forth and are removed from the base plate 1 for maintenance and repair work.

The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.

Claims

1. The detection device for the low-frequency magnetic field immunity convenient to maintain is characterized by comprising a base plate (1), an electromagnetic wave chamber (2), a partition plate (3), a switch door (4), an observation window (5), a video monitor (6), a test probe (7), a support column (8), a workbench (9), a computer (10), a controller (11), a driving switch (12), a dismounting and mounting fixing frame structure (13), a movable maintenance rack structure (14), a chamber (15), an intelligent field intensity meter (16) and a filter (17), wherein the electromagnetic wave chamber (2) is integrally arranged at the upper end of the base plate (1), and the chamber (15) is arranged in the electromagnetic wave chamber (2); the partition plate (3) is embedded in the middle left side of the inner wall of the chamber cavity (15); the switch door (4) is hinged on the middle right side of the rear side inside the electromagnetic wave chamber (2); the observation window (5) is embedded above the inside of the switch door (4); the video monitor (6) is mounted on the right side of the upper part of the inner wall of the chamber cavity (15) through bolts; the test probe (7) is mounted on the right side of the lower part of the inner wall of the chamber (15) through a bolt; the supporting columns (8) are respectively welded around the lower end of the workbench (9); the workbench (9) is mounted in the middle of the front end of the electromagnetic wave chamber (2) through bolts; the computer (10), the intelligent field intensity meter (16) and the filter (17) are respectively arranged on the upper surface of the workbench (9); the controller (11) is installed on the middle left side of the upper part of the front end of the electromagnetic wave chamber (2) through a bolt, and the front end of the controller (11) is electrically connected with a driving switch (12); the dismounting fixing frame structure (13) is arranged on the middle right side of the upper surface of the base plate (1); the mobile maintenance rack structure (14) is arranged on the left side of the upper surface of the base plate (1); the dismounting and mounting fixed frame structure (13) comprises a vertical plate (131), a side supporting plate (132), a clamping electric cylinder (133), a movable shaft (134), a movable plate (135) and an adjusting plate frame structure (136), wherein the vertical plate (131) is arranged in the middle of the right side of the upper surface of the base plate (1) through bolts; the side support plates (132) are respectively welded at the front part and the rear part of the left end of the vertical plate (131), and clamping electric cylinders (133) are installed on left bolts on the outer walls of the side support plates (132); the movable shaft (134) is movably embedded in the clamping electric cylinder (133), and a movable plate (135) is mounted on the inner side of the movable shaft (134) through bolts; the adjusting plate frame structure (136) is arranged on the outer side of the moving plate (135); the adjusting plate frame structure (136) comprises a movable sleeve (1361), a movable cavity (1362), a connecting groove (1363), a clamping protection plate (1364), a tension spring (1365) and a connector (1366), wherein the movable cavity (1362) is formed in the middle part inside the movable sleeve (1361); the connecting groove (1363) is formed in the rear side of the interior of the movable sleeve (1361), and meanwhile, the movable sleeve (1361) and the connecting groove (1363) are respectively sleeved on the periphery of the outer wall of the moving plate (135); the clamping protection plate (1364) is welded at the upper end of the movable sleeve (1361); the upper part and the lower part of the tension spring (1365) are respectively inserted into a connector (1366); the connecting head (1366) is respectively in threaded connection with the upper part inside the connecting groove (1363) and the outer side inside the moving plate (135).

2. The easy-to-maintain low-frequency magnetic field immunity detection device as claimed in claim 1, wherein the electromagnetic wave chamber (2) is provided with a through hole at the left middle part of the front part, and the through hole corresponds to the support plate (141).

3. The device for detecting the immunity of a low-frequency magnetic field convenient for maintenance according to claim 1, wherein the clamping electric cylinder (133) is supported by the side supporting plate (132), the moving plate (135) is supported by the clamping electric cylinder (133) in cooperation with the movable shaft (134), the moving plate (135) is made of a steel plate, and the moving plate (135) is arranged in a cross shape.

4. The easy-to-maintain low-frequency magnetic field immunity detection device as claimed in claim 1, wherein, four of the movable sleeve (1361) are provided, and the movable sleeve (1361) is matched with the movable plate (135); press from both sides backplate (1364) cooperation movable sleeve (1361) and be the type of falling L, press from both sides backplate (1364) lower surface be provided with a word anti-skidding line, extension spring (1365) respectively with movable sleeve (1361) and movable plate (135) interconnect.

5. The easy-to-maintain low-frequency magnetic field immunity detection device as claimed in claim 1, wherein the mobile maintenance rack structure (14) comprises a support plate (141), a fastening plate (142), a contracting electric cylinder (143), a signal generator (144), a power amplifier (145), an assembly box (146), an N-type coaxial connector (147) and a mobile maintenance base structure (148), the support plate (141) is respectively bolted to the front and rear parts of the lower end of the fastening plate (142), and the contracting electric cylinder (143) is bolted to the middle part of the inner wall of the fastening plate (142); the signal generator (144) and the power amplifier (145) are respectively arranged on the left side and the right side of the inner side of the fastening plate (142); the assembling box (146) is mounted on an output shaft of the electric shrinkage cylinder (143) through bolts, and an N-shaped coaxial joint (147) is mounted on the right side of the inside of the assembling box (146) through bolts; the N-type coaxial connector (147) is inserted into the middle part inside the partition plate (3); the movable maintenance base structure (148) is arranged at the lower end of the fastening plate (142).

6. The easy-to-maintain low frequency magnetic field immunity detecting device as claimed in claim 5, wherein, two supporting plates (141) are provided at the lower end of the fastening plate (142), and are assembled in a U shape.

7. The device for detecting the immunity of a low-frequency magnetic field convenient for maintenance as claimed in claim 5, wherein the contracting electric cylinder (143) is matched with an assembling box (146) to support an N-type coaxial connector (147).

8. The easy-to-maintain low-frequency magnetic field immunity detection device as claimed in claim 5, wherein said movable maintenance base structure (148) comprises a movable support plate (1481), a first assembly plate (1482), a stabilization column (1483), a second assembly plate (1484), a threaded rod (1485) and a movable motor (1486), and a fastening plate (142) is respectively bolted to the front and rear parts of the upper end of said movable support plate (1481); the first assembling plate (1482) is arranged on the right side of the lower end of the movable support plate (1481) through bolts; the stabilizing column (1483) is embedded in the middle left side of the lower part of the inner wall of the chamber cavity (15), and the stabilizing column (1483) is inserted into the first assembling plate (1482); the second assembling plate (1484) is arranged on the left side of the lower end of the movable support plate (1481) through bolts; threaded rod (1485) one end and moving motor (1486) output shaft coupling, the other end passes through the bearing and installs in the left place ahead of room chamber (15) inner wall lower part, threaded rod (1485) and second assembled plate (1484) threaded connection simultaneously.

9. The apparatus for detecting immunity to low frequency magnetic field convenient for maintenance according to claim 8, wherein said first assembling plate (1482) and said second assembling plate (1484) are respectively provided in an L-shape and support said first assembling plate (1482); the rear end of the threaded rod (1485) is supported by a moving motor (1486).