Vehicle-mounted power frequency electromagnetic environment patrolling device and patrolling method

Abstract

The invention discloses a vehicle-mounted power frequency electromagnetic environment patrolling device and patrolling method.The device comprises a main body, an adsorption mechanism and a protection mechanism, the main body comprises a bottom plate, the top of the bottom plate is detachably connected with a shell, the top and the bottom of the shell are open, the top of the shell is detachably connected with a top plate, and the top of the top plate is fixedly connected with a fluxgate sensor; the adsorption mechanism comprises a mounting cylinder arranged in the shell, the mounting cylinder is fixedly connected to the top of the bottom plate, the outer side of the mounting cylinder is rotationally sleeved with a rotating cylinder, and the bottom of the outer side of the rotating cylinder is fixedly sleeved with a gear ring; the magnetic fluxgate sensor protection device has the beneficial effects that the protection mechanism is arranged to be matched with the adsorption mechanism, so that the three groups of arc-shaped baffles extend out to protect the magnetic fluxgate sensor when the three groups of suction cups fall off, the magnetic fluxgate sensor is prevented from being damaged, the three groups of suction cups which can be stored and unfolded are arranged, and the three groups of suction cups are automatically stored when falling off; and three groups of balancing weights are matched, so that the side where the fluxgate sensor is located upwarps after the device falls, and collision on one side of the fluxgate sensor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power frequency electromagnetic environment inspection and detection, and in particular to a vehicle-mounted power frequency electromagnetic environment inspection and detection device and inspection and detection method. Background Art

[0002] The industrial frequency electronic environment refers to the electromagnetic field environment generated by the 50Hz or 60Hz AC power grid frequency, which is usually related to power systems, substations, distribution networks, etc. This environment is mainly composed of electromagnetic interference, harmonics and industrial frequency electromagnetic fields generated by the operation of the power system. The stability of the industrial frequency electronic environment is directly related to the normal operation of the facilities. Therefore, it is necessary to patrol the industrial frequency electronic environment. The vehicle-mounted industrial frequency electromagnetic environment patrol device is a device specially designed for industrial frequency electromagnetic environment monitoring in a mobile environment.

[0003] The current on-board industrial frequency electromagnetic environment patrol device usually consists of a negative pressure suction cup and a sensor for detecting the magnetic field. The device is fixed on the roof of the vehicle or other appropriate positions by the negative pressure suction cup. Since obstructions may interfere with the normal operation of the magnetic field sensor, the sensor is usually designed to be exposed and has poor protection capabilities. The fixing method of the negative pressure suction cup may be affected by the external environment, and there is a risk of weak adsorption or falling off. Once the suction cup falls off, the sensor is easily damaged. Therefore, a vehicle-mounted industrial frequency electromagnetic environment patrol device and a patrol method are proposed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The present invention has been proposed in view of the above-mentioned problems.

[0006] Therefore, the purpose of the present invention is to provide a vehicle-mounted industrial frequency electromagnetic environment patrol device and patrol method, which is used to solve the problem that the existing technology lacks protection capabilities for sensors and once the device falls off, it is easy to cause damage to the sensor.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a vehicle-mounted power frequency electromagnetic environment inspection device, comprising:

[0008] A main body, comprising a bottom plate, a shell is detachably connected to the top of the bottom plate, the top and bottom of the shell are open, a top plate is detachably connected to the top of the shell, and a fluxgate sensor is fixedly connected to the top of the top plate;

[0009] The adsorption mechanism comprises a mounting cylinder arranged in a shell, the mounting cylinder is fixedly connected to the top of the bottom plate, a rotating sleeve is rotatably provided on the outer side of the mounting cylinder, a gear ring is fixedly provided on the outer bottom of the rotating sleeve, three groups of transmission gears with rotating shafts are also arranged in the shell, the three groups of transmission gear rotating shafts all penetrate the bottom plate and are rotatably connected with the bottom plate, the three groups of transmission gears are equidistantly arranged around the rotating cylinder, the three groups of transmission gears are meshed with the gear ring, the bottom ends of the three groups of transmission gear rotating shafts are fixedly connected with connecting strips, the bottom sides of the three groups of connecting strips away from the transmission gear rotating shafts are fixedly connected with suction cups, the three groups of suction cups are jointly matched with a piston cylinder, the piston cylinder penetrates the bottom plate and is fixedly connected with the bottom plate, a negative pressure pump is fixedly connected to the bottom of the piston cylinder, a one-way valve is fixedly connected to the air outlet of the negative pressure pump, the one-way valve is fixedly connected to the piston cylinder, the tops of the three groups of suction cups are fixedly connected with connecting pipes, and the ends of the three groups of connecting pipes away from the suction cups are fixedly connected with the piston cylinder;

[0010] The protection mechanism comprises a mounting plate, which is arranged on the inner side of the mounting cylinder and above the piston cylinder, three groups of arc-shaped baffles are fixedly connected to the top of the mounting plate, the three groups of arc-shaped baffles are equidistantly distributed in a ring shape, openings are provided at the positions of the top plate facing the three groups of arc-shaped baffles, the three groups of arc-shaped baffles pass through the three groups of openings respectively, the fluxgate sensor is located on the inner sides of the three groups of arc-shaped baffles, the outer bottoms of the three groups of arc-shaped baffles are fixedly connected with blocks, the positions of the rotating cylinder facing the three groups of blocks are provided with oblique grooves, the three groups of blocks are respectively inserted into the three groups of oblique grooves, a piston rod is fixedly connected to the bottom of the mounting plate, the piston rod passes through the top of the piston cylinder and is slidably connected to the piston cylinder, a piston is slidably connected in the piston cylinder, the piston is fixedly connected to the bottom end of the piston rod, a reset spring is also provided under the mounting plate, and the two ends of the reset spring are respectively abutted against the bottom plate and the mounting plate;

[0011] Among them, when the arc-shaped baffle moves from the highest point to the lowest point, the three groups of suction cups expand outward, and when the arc-shaped baffle is at the lowest point, its top is flush with the top of the top plate. The one-way valve conducts from the negative pressure pump to the piston cylinder, and the size of the side of the shell close to the bottom plate is larger than the size of the side away from the bottom plate.

[0012] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the shape and size of the top plate opening are consistent with the arc baffle, the arc baffle is in an arc shape, and three groups of the arc baffles are arranged in an arc-shaped overlapping manner.

[0013] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, four groups of first screw holes are opened at the bottom of the shell and the four groups of first screw holes are all equipped with first screws, and the positions of the base plate opposite to the four groups of first screw holes are all opened with first through holes, and the four groups of first screws respectively pass through the four groups of first through holes and are screwed into the corresponding first screw holes, and the shell is detachably connected to the base plate through the four groups of first screws.

[0014] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, three groups of second screw holes are opened on the top of the shell and the three groups of second screw holes are all equipped with second screws, and second through holes are opened at the positions of the top plate facing the three groups of second screw holes, and the three groups of second screws pass through the three groups of second through holes respectively and are screwed into the corresponding second screw holes.

[0015] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the main body also includes three groups of counterweight blocks arranged in the shell, and the three groups of counterweight blocks are fixedly connected to the bottom plate.

[0016] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the bottom plate, shell, top plate, piston cylinder, mounting plate, piston rod and return spring axis are arranged to coincide with each other, and the three groups of counterweights are arranged equidistantly around the rotating cylinder.

[0017] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the mounting plate, three groups of arc-shaped baffles and three groups of abutments are all made of plastic material, and the mounting plate, three groups of arc-shaped baffles and three groups of abutments are integrally formed.

[0018] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the three groups of suction cups are distributed in a ring shape with equal distances, and the three groups of suction cups are all made of rubber material.

[0019] As a preferred solution of the vehicle-mounted industrial frequency electromagnetic environment patrol device described in the present invention, the bottom plate, shell, top plate, rotating drum and gear ring are all made of plastic material, and the rotating drum and gear ring are integrally formed.

[0020] Based on the above-mentioned vehicle-mounted power frequency electromagnetic environment inspection device, the present invention additionally provides a vehicle-mounted power frequency electromagnetic environment inspection method, which specifically includes the following steps:

[0021] S1, initially, three sets of arc-shaped baffles shield the fluxgate sensor, and three sets of suction cups are folded and stored under the bottom plate. When in use, the negative pressure pump is started, and the negative pressure pump draws air into the piston cylinder, generating suction at the three sets of suction cups;

[0022] S2, press down the three groups of arc baffles, the three groups of arc baffles drive the mounting plate to move downward, the reset spring is compressed, the mounting plate drives the piston to move downward through the piston rod, the three groups of arc baffles move downward and drive the three groups of resistance blocks to move downward synchronously, the three groups of resistance blocks drive the rotating drum to rotate through the inclined groove when they move downward, the rotating drum drives the gear ring to rotate when the rotating drum rotates, the gear ring drives the three groups of transmission gears to rotate when the gear ring rotates, the three groups of transmission gears drive the three groups of connecting strips to rotate respectively, the three groups of suction cups are spread outward, and pressed until the top of the arc baffle is flush with the top of the top plate, stop pressing, and adsorb the three groups of suction cups of the device to the appropriate position on the roof, and the device installation is completed;

[0023] S3, when the three groups of suction cups fall off, the reset spring rebounds and drives the mounting plate to move up, and the mounting plate drives the three groups of arc-shaped baffles to move up to cover the fluxgate sensor. The three groups of arc-shaped baffles cooperate with the three groups of resistance blocks to drive the rotating drum to rotate, the rotating drum drives the gear ring to rotate, the gear ring drives the three groups of transmission gears to rotate, the three groups of transmission gears respectively drive the three groups of connecting strips to rotate, and the three groups of connecting strips respectively drive the three groups of suction cups to move under the bottom plate. When the device falls, the three groups of arc-shaped baffles protect the fluxgate sensor. Under the gravity of the three groups of counterweights, the side where the fluxgate sensor is located is tilted, thereby reducing the number of collisions on one side of the fluxgate sensor.

[0024] Beneficial effects of the present invention:

[0025] 1. By setting up a protective mechanism and an adsorption mechanism, when the three groups of suction cups fall off, the three groups of arc baffles extend to protect the fluxgate sensor, thereby preventing the fluxgate sensor from being damaged. At the same time, when the device is fixed to the vehicle, the three groups of arc baffles are stored to avoid affecting the detection of the fluxgate sensor.

[0026] 2. By setting three sets of suction cups that can be folded and unfolded, the three sets of suction cups are unfolded when the device is fixed to the vehicle, which can ensure the stability of the device. The three sets of suction cups are automatically folded when they fall off. With the three sets of counterweights, the side where the fluxgate sensor is located is tilted after the device falls, which is beneficial to reduce the collision on one side of the fluxgate sensor, thereby preventing the fluxgate sensor from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 The figure is a schematic diagram of the upper three-dimensional structure of a vehicle-mounted industrial frequency electromagnetic environment patrol device of the present invention.

[0029] Figure 2The figure is a schematic diagram of the bottom three-dimensional structure of a vehicle-mounted industrial frequency electromagnetic environment patrol device of the present invention.

[0030] Figure 3 The diagram is a partially disassembled structural diagram of a vehicle-mounted industrial frequency electromagnetic environment patrol device according to the present invention.

[0031] Figure 4 For the present invention Figure 3 A magnified view of the structure of area A.

[0032] Figure 5 The present invention is a three-dimensional cross-sectional structural schematic diagram of a vehicle-mounted industrial frequency electromagnetic environment patrol device.

[0033] Figure 6 The present invention is a schematic cross-sectional structural diagram of a vehicle-mounted industrial frequency electromagnetic environment patrol device.

[0034] Figure 7 It is a schematic diagram of the upper three-dimensional structure of a vehicle-mounted industrial frequency electromagnetic environment patrol device in use state of the present invention.

[0035] Figure 8 This is a schematic diagram of the lower three-dimensional structure of a vehicle-mounted industrial frequency electromagnetic environment patrol device in use state according to the present invention.

[0036] Description of the drawings: 100, main body; 101, bottom plate; 102, shell; 103, top plate; 104, fluxgate sensor; 105, counterweight; 200, adsorption mechanism; 201, mounting cylinder; 202, rotating cylinder; 202a, inclined groove; 203, gear ring; 204, transmission gear; 205, connecting strip; 206, suction cup; 207, piston cylinder; 208, negative pressure pump; 209, connecting pipe; 210, one-way valve; 300, protection mechanism; 301, mounting plate; 302, arc baffle; 303, block; 304, piston rod; 305, piston; 306, reset spring. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] Example 1

[0042] A vehicle-mounted power frequency electromagnetic environment inspection device, comprising:

[0043] The main body 100 includes a bottom plate 101, a shell 102 is detachably connected to the top of the bottom plate 101, the top and bottom of the shell 102 are open, a top plate 103 is detachably connected to the top of the shell 102, a fluxgate sensor 104 is fixedly connected to the top of the top plate 103, four groups of first screw holes are opened at the bottom of the shell 102, and the four groups of first screw holes are matched with first screws, first through holes are opened at positions of the bottom plate 101 facing the four groups of first screw holes, the four groups of first screws pass through the four groups of first through holes respectively and are screwed into the corresponding first screw holes, the shell 102 is detachably connected to the bottom plate 101 through the four groups of first screws, three groups of second screw holes are opened at the top of the shell 102, and the three groups of second screw holes are matched with second screws, second through holes are opened at positions of the top plate 103 facing the three groups of second screw holes, the three groups of second screws pass through the three groups of second through holes respectively and are screwed into the corresponding second screw holes;

[0044] The adsorption mechanism 200 includes a mounting cylinder 201 disposed in a housing 102, the mounting cylinder 201 is fixedly connected to the top of the bottom plate 101, a rotating cylinder 202 is rotatably sleeved on the outside of the mounting cylinder 201, a gear ring 203 is fixedly sleeved on the bottom outside of the rotating cylinder 202, and three sets of transmission gears 204 with rotating shafts are also disposed in the housing 102, the rotating shafts of the three sets of transmission gears 204 all penetrate the bottom plate 101 and are rotatably connected to the bottom plate 101, the three sets of transmission gears 204 are equidistantly arranged around the rotating cylinder 202, the three sets of transmission gears 204 are all meshed with the gear ring 203, and the bottom ends of the rotating shafts of the three sets of transmission gears 204 are fixedly connected with a connecting rod. Connecting strips 205, the bottom of the three groups of connecting strips 205 are fixedly connected with suction cups 206 on one side away from the rotating shaft of the transmission gear 204, the three groups of suction cups 206 are jointly matched with a piston cylinder 207, the piston cylinder 207 penetrates the bottom plate 101 and is fixedly connected to the bottom plate 101, the bottom of the piston cylinder 207 is fixedly connected with a negative pressure pump 208, the suction port of the negative pressure pump 208 is fixedly connected with a one-way valve 210, the one-way valve 210 is fixedly connected with the piston cylinder 207, the tops of the three groups of suction cups 206 are fixedly connected with connecting pipes 209, and the ends of the three groups of connecting pipes 209 away from the suction cups 206 are fixedly connected with the piston cylinder 207;

[0045] The protection mechanism 300 includes a mounting plate 301, which is arranged on the inner side of the mounting cylinder 201 and above the piston cylinder 207. Three groups of arc-shaped baffles 302 are fixedly connected to the top of the mounting plate 301. The three groups of arc-shaped baffles 302 are equidistantly distributed in a ring shape. Openings are provided at the positions of the top plate 103 facing the three groups of arc-shaped baffles 302. The three groups of arc-shaped baffles 302 pass through the three groups of openings respectively. The fluxgate sensor 104 is located on the inner side of the three groups of arc-shaped baffles 302. The outer bottoms of the three groups of arc-shaped baffles 302 are fixedly connected with abutments 303. The position of the cylinder 202 facing the three groups of abutment blocks 303 is provided with an inclined groove 202a, and the three groups of abutment blocks 303 are respectively inserted into the three groups of inclined grooves 202a. The bottom of the mounting plate 301 is fixedly connected with a piston rod 304, which passes through the top of the piston cylinder 207 and is slidably connected with the piston cylinder 207. A piston 305 is slidably connected in the piston cylinder 207, and the piston 305 is fixedly connected with the bottom end of the piston rod 304. A return spring 306 is also provided under the mounting plate 301, and the two ends of the return spring 306 are respectively in contact with the bottom plate 101 and the mounting plate 301;

[0046] Among them, when the arc baffle 302 moves from the highest point to the lowest point, the three groups of suction cups 206 expand outward, and when the arc baffle 302 is at the lowest point, its top is flush with the top of the top plate 103, and the one-way valve 210 conducts in the direction from the negative pressure pump 208 to the piston cylinder 207. The size of the side of the shell 102 close to the bottom plate 101 is larger than the size of the side away from the bottom plate 101.

[0047] Among them, the opening shape and size of the top plate 103 are consistent with the arc baffle 302, the arc baffle 302 is arc-shaped, and the three groups of arc baffles 302 are arranged in an arc-shaped overlapping manner. The main body 100 also includes three groups of counterweight blocks 105 arranged in the shell 102, and the three groups of counterweight blocks 105 are fixedly connected to the bottom plate 101.

[0048] In addition, the bottom plate 101 , the housing 102 , the top plate 103 , the piston cylinder 207 , the mounting plate 301 , the piston rod 304 and the return spring 306 are arranged with their axes overlapping, and the three sets of counterweights 105 are arranged equidistantly around the rotating cylinder 202 .

[0049] It should be noted that the mounting plate 301, the three groups of arc-shaped baffles 302 and the three groups of resistance blocks 303 are all made of plastic material, the mounting plate 301, the three groups of arc-shaped baffles 302 and the three groups of resistance blocks 303 are integrally formed, the three groups of suction cups 206 are equidistantly distributed in a ring shape, the three groups of suction cups 206 are all made of rubber material, the bottom plate 101, the shell 102, the top plate 103, the rotating drum 202 and the gear ring 203 are all made of plastic material, and the rotating drum 202 and the gear ring 203 are integrally formed.

[0050] Example 2

[0051] A patrol method of a vehicle-mounted power frequency electromagnetic environment patrol device, based on Example 1, specifically comprises the following steps:

[0052] S1, initially, the three sets of arc-shaped baffles 302 shield the fluxgate sensor 104, and the three sets of suction cups 206 are folded and stored under the bottom plate 101. When in use, the negative pressure pump 208 is started, and the negative pressure pump 208 pumps air into the piston cylinder 207, and suction is generated at the three sets of suction cups 206;

[0053] S2, press down the three groups of arc baffles 302, the three groups of arc baffles 302 drive the mounting plate 301 to move downward, the reset spring 306 is compressed, the mounting plate 301 drives the piston 305 to move downward through the piston rod 304, and the three groups of arc baffles 302 respectively drive the three groups of resistance blocks 303 to move downward synchronously when moving downward, and the three groups of resistance blocks 303 drive the rotating drum 202 to rotate through the inclined groove 202a when moving downward, and the rotating drum 202 drives the gear ring 203 to rotate when rotating, and the gear ring 203 drives the three groups of transmission gears 204 to rotate when rotating, and the three groups of transmission gears 204 respectively drive the three groups of connecting strips 205 to rotate, and the three groups of suction cups 206 are unfolded outward and pressed until the top of the arc baffle 302 is flush with the top of the top plate 103, stop pressing, and adsorb the three groups of suction cups 206 of the device to the appropriate position on the roof, and the device installation is completed;

[0054] S3, when the three groups of suction cups 206 fall off, the reset spring 306 rebounds, driving the mounting plate 301 to move upward, and the mounting plate 301 drives the three groups of arc baffles 302 to move upward to block the fluxgate sensor 104, and the three groups of arc baffles 302 cooperate with the three groups of resistance blocks 303 to drive the rotating drum 202 to rotate, and the rotating drum 202 drives the gear ring 203 to rotate, and the gear ring 203 drives the three groups of transmission gears 204 to rotate. The three groups of transmission gears 204 respectively drive the three groups of connecting strips 205 to rotate, and the three groups of connecting strips 205 respectively drive the three groups of suction cups 206 to move to the bottom of the bottom plate 101. When the device falls, the three groups of arc baffles 302 protect the fluxgate sensor 104. Under the gravity of the three groups of counterweights 105, the side where the fluxgate sensor 104 is located is tilted, thereby reducing the number of collisions on one side of the fluxgate sensor 104.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A vehicle-mounted power frequency electromagnetic environment inspection device, characterized in that: include: A main body (100) comprises a bottom plate (101), the top of the bottom plate (101) being detachably connected to a shell (102), the top and bottom of the shell (102) being open, the top of the shell (102) being detachably connected to a top plate (103), and the top of the top plate (103) being fixedly connected to a fluxgate sensor (104); The adsorption mechanism (200) comprises a mounting cylinder (201) arranged in a housing (102), the mounting cylinder (201) being fixedly connected to the top of a bottom plate (101), a rotating cylinder (202) being rotatably sleeved on the outside of the mounting cylinder (201), a toothed ring (203) being fixedly sleeved on the outside bottom of the rotating cylinder (202), three groups of transmission gears (204) with rotating shafts being further arranged in the housing (102), the rotating shafts of the three groups of transmission gears (204) all passing through the bottom plate (101) and being rotatably connected to the bottom plate (101), the three groups of transmission gears (204) being equidistantly arranged around the rotating cylinder (202), the three groups of transmission gears (204) all meshing with the toothed ring (203), the bottom ends of the rotating shafts of the three groups of transmission gears (204) all being fixedly connected to connecting gears (203). The three groups of connecting slats (205) are fixedly connected with suction cups (206) at the bottom side away from the rotating shaft of the transmission gear (204); the three groups of suction cups (206) are jointly matched with a piston cylinder (207); the piston cylinder (207) penetrates the bottom plate (101) and is fixedly connected to the bottom plate (101); the bottom of the piston cylinder (207) is fixedly connected with a negative pressure pump (208); the air outlet of the negative pressure pump (208) is fixedly connected with a one-way valve (210); the one-way valve (210) is fixedly connected with the piston cylinder (207); the tops of the three groups of suction cups (206) are fixedly connected with connecting pipes (209); the ends of the three groups of connecting pipes (209) away from the suction cups (206) are fixedly connected with the piston cylinder (207); The protection mechanism (300) comprises a mounting plate (301), wherein the mounting plate (301) is arranged inside the mounting cylinder (201) and above the piston cylinder (207), wherein three groups of arc-shaped baffles (302) are fixedly connected to the top of the mounting plate (301), wherein the three groups of arc-shaped baffles (302) are distributed equidistantly in a ring shape, wherein the top plate (103) is provided with openings at positions facing the three groups of arc-shaped baffles (302), wherein the three groups of arc-shaped baffles (302) pass through the three groups of openings respectively, wherein the fluxgate sensor (104) is located inside the three groups of arc-shaped baffles (302), wherein the outer bottoms of the three groups of arc-shaped baffles (302) are fixedly connected to abutments (303), wherein the rotating cylinder (2 02) The positions facing the three groups of abutment blocks (303) are all provided with inclined grooves (202a), and the three groups of abutment blocks (303) are respectively inserted into the three groups of inclined grooves (202a), and the bottom of the mounting plate (301) is fixedly connected with a piston rod (304), and the piston rod (304) passes through the top of the piston cylinder (207) and is slidably connected with the piston cylinder (207), and a piston (305) is slidably connected in the piston cylinder (207), and the piston (305) is fixedly connected with the bottom end of the piston rod (304), and a return spring (306) is also provided below the mounting plate (301), and the two ends of the return spring (306) are respectively in contact with the bottom plate (101) and the mounting plate (301); When the arc-shaped baffle (302) moves from the highest point to the lowest point, the three groups of suction cups (206) expand outward, and when the arc-shaped baffle (302) is at the lowest point, its top is flush with the top of the top plate (103), and the one-way valve (210) is connected in the direction from the negative pressure pump (208) to the piston cylinder (207), and the size of the side of the shell (102) close to the bottom plate (101) is larger than the size of the side away from the bottom plate (101).

2. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1 is characterized in that: The shape and size of the opening of the top plate (103) are consistent with the arc-shaped baffle (302), the arc-shaped baffle (302) is in an arc shape, and three groups of the arc-shaped baffles (302) are arranged to overlap in an arc shape.

3. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1 is characterized in that: The shell (102) is provided with four groups of first screw holes at the bottom, and the four groups of first screw holes are all equipped with first screws. The base plate (101) is provided with first through holes at positions opposite to the four groups of first screw holes. The four groups of first screws pass through the four groups of first through holes respectively and are screwed into the corresponding first screw holes. The shell (102) is detachably connected to the base plate (101) via the four groups of first screws.

4. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1 is characterized in that: The shell (102) is provided with three groups of second screw holes on the top and the three groups of second screw holes are all equipped with second screws. The top plate (103) is provided with second through holes at positions opposite to the three groups of second screw holes. The three groups of second screws pass through the three groups of second through holes respectively and are screwed into the corresponding second screw holes.

5. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1 is characterized in that: The main body (100) further comprises three groups of counterweight blocks (105) arranged in the shell (102), and the three groups of counterweight blocks (105) are all fixedly connected to the bottom plate (101).

6. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 5, characterized in that: The axes of the bottom plate (101), the housing (102), the top plate (103), the piston cylinder (207), the mounting plate (301), the piston rod (304) and the return spring (306) are arranged to coincide with each other, and the three groups of counterweights (105) are arranged at equal distances around the rotating cylinder (202).

7. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1, characterized in that: The mounting plate (301), the three groups of arc-shaped baffles (302) and the three groups of abutment blocks (303) are all made of plastic material, and the mounting plate (301), the three groups of arc-shaped baffles (302) and the three groups of abutment blocks (303) are integrally formed.

8. The vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1, characterized in that: The three groups of suction cups (206) are distributed in a circular shape with equal distances, and the three groups of suction cups (206) are all made of rubber material.

9. A vehicle-mounted power frequency electromagnetic environment inspection device according to claim 1 or 7, characterized in that: The bottom plate (101), the shell (102), the top plate (103), the rotating drum (202) and the gear ring (203) are all made of plastic material, and the rotating drum (202) and the gear ring (203) are integrally formed.

10. A patrol method for a vehicle-mounted power frequency electromagnetic environment patrol device, characterized in that: The specific steps include: S1, initially, the three groups of arc-shaped baffles (302) shield the fluxgate sensor (104), and the three groups of suction cups (206) are folded and stored under the bottom plate (101). When in use, the negative pressure pump (208) is started, and the negative pressure pump (208) draws air into the piston cylinder (207), generating suction at the three groups of suction cups (206); S2, the three groups of arc-shaped baffles (302) are pressed downward, the three groups of arc-shaped baffles (302) drive the mounting plate (301) to move downward, the return spring (306) is compressed, the mounting plate (301) drives the piston (305) to move downward through the piston rod (304), and when the three groups of arc-shaped baffles (302) move downward, they respectively drive the three groups of resistance blocks (303) to move downward synchronously, and when the three groups of resistance blocks (303) move downward, they drive the rotating drum (202) to rotate through the inclined groove (202a), and the rotating drum When (202) rotates, the gear ring (203) is driven to rotate. When the gear ring (203) rotates, the three sets of transmission gears (204) are driven to rotate. The three sets of transmission gears (204) respectively drive the three sets of connecting strips (205) to rotate. The three sets of suction cups (206) are spread outward and pressed until the top of the arc-shaped baffle (302) is flush with the top of the top plate (103). The pressing is stopped, and the three sets of suction cups (206) of the device are adsorbed on the appropriate position of the roof. The device installation is completed; S3, when the three groups of suction cups (206) fall off, the reset spring (306) rebounds, driving the mounting plate (301) to move upward, the mounting plate (301) drives the three groups of arc baffles (302) to move upward to block the fluxgate sensor (104), the three groups of arc baffles (302) cooperate with the three groups of resistance blocks (303) to drive the rotating drum (202) to rotate, the rotating drum (202) drives the gear ring (203) to rotate, the gear ring (203) drives the three groups of transmission gears (204) to rotate the three groups of The transmission gear (204) drives the three groups of connection strips (205) to rotate respectively, and the three groups of connection strips (205) drive the three groups of suction cups (206) to move to the bottom of the bottom plate (101). When the device falls, the three groups of arc-shaped baffles (302) protect the fluxgate sensor (104). Under the gravity of the three groups of counterweights (105), the side where the fluxgate sensor (104) is located is tilted, thereby reducing the number of collisions on one side of the fluxgate sensor (104).

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