A DC magnetic field testing device for magnetic field coils

Abstract

The present invention discloses a DC magnetic field testing device for a magnetic field coil, comprising a device main body, a display component provided on the front end surface of the device main body, a control button provided on the front end surface of the device main body, a charging port provided on the bottom of the device main body, a probe cable fixedly connected to the top of the device main body, a Hall probe fixedly connected to the other end of the probe cable, a rectangular block fixedly connected to the outer surface of the Hall probe, a protective tube fixedly connected to the right side surface of the device main body, a storage component fixedly connected to the back of the device main body, and a charging component provided on the bottom of the device main body; the DC magnetic field testing device for a magnetic field coil can more intuitively display the remaining power of the device by providing the display component, and can issue an alarm when the power is too low to remind the user to charge; the protective component provided can protect the Hall probe after use to prevent damage to the probe.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic field coils, in particular to a DC magnetic field testing device for magnetic field coils. Background Art

[0002] A magnetic field coil, also known as an "induction coil," has a defined shape and size. It is a device that generates a magnetic field by passing an electric current through a conductor. This can produce fields ranging from weak magnetic fields to hundreds of Gs. Single-loop coils and Holmhertz coils are commonly used in power-frequency magnetic field immunity testing. Single-loop coils have a simpler structure and produce a smaller uniform field, making them suitable for immersion and proximity testing. Holmhertz coils, also known as "double-loop coils," consist of two parallel and coaxial coils of the same radius and number of turns. Current flows through the coils in the same direction, creating a three-dimensional magnetic field in the area between the coils, making them suitable for immersion testing.

[0003] Sensors are fragile devices and are not covered by the manufacturer's warranty. Therefore, they must be used with caution and must be handled with care. Existing devices do not have protective components, and the probes may be damaged after use. Existing devices do not have power reminder components, and the battery may be too low and the user may not charge it, affecting the next use of the device. Existing devices usually have fixed lengths of probe cables and do not have storage components. During use, the cables easily become tangled, making them inconvenient. Existing devices generally require the device to be placed directly on a desktop to charge via the charging cable, and during this process, the device is prone to falling. Summary of the Invention

[0004] The purpose of the present invention is to address the shortcomings of the existing technology and provide a DC magnetic field testing device for a magnetic field coil, which is used to solve the problems that the probe may be damaged after use, there is no power reminder component, the power may be too low and the user may not charge it, there is no storage component, the cables are easily tangled together during use, and the device is directly placed on the desktop and charged via the charging cable, during which the device is prone to falling.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: it includes a device body, the front end surface of the device body is provided with a display component, the front end surface of the device body is provided with a control button, the bottom of the device body is provided with a charging port, the top of the device body is fixedly connected to a probe cable, the other end of the probe cable is fixedly connected to a Hall probe, the outer surface of the Hall probe is fixedly connected to a rectangular block, the right side of the device body is fixedly connected to a protective tube, the back of the device body is fixedly connected to a storage component, and the bottom of the device body is provided with a charging component.

[0006] As a preferred technical solution of the present invention, the display component includes a display screen, an indicator light and a buzzer. The front face of the device body is provided with a display screen, the top of the display screen is provided with an indicator light, and the bottom of the display screen is provided with a buzzer.

[0007] As a preferred technical solution of the present invention, a single-chip microcomputer is provided inside the main body of the device, and the single-chip microcomputer is electrically connected to the display screen. There are three groups of indicator lights, which are linearly and evenly spaced. The three groups of indicator lights are LED green light, LED yellow light and LED red light from left to right. The indicator lights are electrically connected to the single-chip microcomputer, and the buzzer is electrically connected to the LED red light.

[0008] As a preferred technical solution of the present invention, the protective tube includes a protective groove, a fixed groove, a fixed column, a sliding rail, a slider, a locking groove, a spring groove, a compression spring and a movable block. The top of the protective tube is provided with a protective groove, one side of the protective groove is provided with a fixed groove, the interior of the fixed groove is provided with a fixed column, the side surface of the protective groove is provided with a sliding rail, the interior of the sliding rail is provided with a slider, the top of the slider is provided with a locking groove, one side of the sliding rail is provided with a spring groove, the interior of the spring groove is fixedly connected to a compression spring, and the other end of the compression spring is fixedly connected to a movable block.

[0009] As a preferred technical solution of the present invention, the protective groove is a rectangular groove connected to a circular groove, the inner diameter size of the circular groove matches the outer surface size of the Hall probe, the inner diameter size of the rectangular groove matches the outer surface size of the rectangular block, the shape of the fixed column is "I"-shaped, the size of the middle connecting column of the fixed column matches the inner diameter size of the fixed groove, the bottom of the fixed column is conical, the shape of the slide rail is a quarter-circular groove, the slider is a fan-shaped block, a rectangular groove is provided on the top of the slider, and the size of the locking groove matches the outer surface size of the fixed column.

[0010] As a preferred technical solution of the present invention, the storage assembly includes a storage block, a limit block, a plug-in hole, a stop block, a semicircular groove, a slide groove and a card block. The back of the device body is fixedly connected to the storage block, the side wall of the storage block is fixedly connected to the limit block, one side of the limit block is provided with a plug-in hole, the rear end face of the storage block is provided with a stop block, a semicircular groove is provided on the side of the stop block close to the storage block, a slide groove is provided on the side of the stop block close to the limit block, and a card block is provided on the outer surface of the stop block.

[0011] As a preferred technical solution of the present invention, there are four sets of the storage blocks, and they are linearly and equally spaced. A storage groove is formed on the rear end surface of the storage block. The inner diameter size of the storage groove matches the outer surface size of the probe cable. There are four sets of the limiting blocks. Two sets of the limiting blocks are fixedly connected to the right side wall of the rightmost storage block, and the other two sets of the limiting blocks are fixedly connected to the left side wall of the leftmost storage block. The shape of the limiting block is "convex", and the protruding ends of the two sets of limiting blocks are arranged oppositely. There are two sets of the insertion holes, and they are respectively arranged between the two sets of limiting blocks. The shape of the blocking block is "冂". There are four sets of the sliding grooves. The inner diameter size of the sliding groove matches the outer surface size of the top of the limiting block. The shape of the clamping block is "H". There are two sets of the clamping blocks, and they are respectively movably connected to the left and right side walls of the blocking block. The end surface size of the clamping block matches the inner diameter size of the insertion hole.

[0012] As a preferred technical solution of the present invention, the charging component includes a charging base, a placement groove, a charging end, a charging plug and a suction cup. The charging base is arranged at the bottom of the device main body. A placement groove is formed on the top of the charging base. The charging end is fixedly connected inside the placement groove. A charging plug is arranged on one side of the charging base. The suction cup is fixedly connected to the bottom of the charging base.

[0013] As a preferred technical solution of the present invention, the outer surface size of the bottom end of the device main body matches the inner diameter size of the placement groove. The outer surface size of the charging end matches the inner diameter size of the charging port. The charging end is electrically connected to the charging plug. The charging plug is a triangular plug. There are several sets of the suction cups, and they are distributed in a rectangle at the bottom of the charging base.

[0014] Compared with the prior art, the present invention provides a DC magnetic field testing device for a magnetic field coil, and has the following beneficial effects:

[0015] 1. For this DC magnetic field testing device for a magnetic field coil, the specific information of the magnetic field and the remaining situation of the power supply are displayed through the display screen, and the situation is transmitted to the single-chip microcomputer. At this time, the single-chip microcomputer will turn on the corresponding indicator light according to the remaining situation of the power. When the power is lower than 50%, only the LED green light is on. When the power is less than 50% and greater than 10%, only the LED yellow light is on. When the power is less than 10%, at this time, not only the LED red light flashes, but the buzzer also emits an alarm sound, so as to remind the user to charge the device. Through the above settings, the remaining power situation of the device can be observed more intuitively, and an alarm is issued when the power is too low, so as to charge the device in time.

[0016] 2. This is a DC magnetic field testing device for a magnetic field coil. After the device is used, the Hall probe is inserted into the inside of the protective tube until the rectangular block is inserted into the rectangular groove of the slider. The Hall probe is then rotated to drive the slider to slide inside the slide rail. When the slider squeezes the movable block into the inside of the spring groove, the fixed column will be inserted into the locking groove under the action of gravity, thereby fixing the slider and then fixing the Hall probe inside the protective tube to protect the Hall probe.

[0017] 3. A DC magnetic field testing device for a magnetic field coil, wherein the probe cables are placed in an S shape in sequence inside the storage block, and then the sliding groove of the block is sleeved on the raised part of the limit block, and then the block is pushed toward the storage block until the block contacts the storage block, and then the card block is pushed toward the plug hole until the card block is plugged into the inside of the plug hole, thereby fixing the block at the rear end of the storage block, and then fixing the probe cable in the storage block, so as to prevent the probe cable from being too long and causing the cables to be entangled.

[0018] 4. This DC magnetic field testing device for a magnetic field coil is placed in a suitable position through a charging base, and then the charging base is squeezed so that the suction cup is adsorbed with the contact surface, thereby fixing the charging base, and then the device body is inserted into the inside of the placement slot. At this time, the charging port of the device body will be plugged into the charging end, and then the charging plug is electrically connected to the socket, so that the charging base charges the device body. The charging base can be fixed on the desktop through the provided suction cup, and the device body is fixed on the charging base through the provided placement slot to prevent the device from falling during charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the Hall probe, protective tube and fixed column of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the protective tube of the present invention;

[0022] Figure 4 This is a schematic diagram of the slider structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the back structure of the device body and the internal structure of the charging base of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the receiving block and the stop block of the present invention.

[0025] In the figure: 1. Device body; 2. Display screen; 21. Indicator light; 22. Buzzer; 3. Control button; 4. Charging port; 5. Probe cable; 6. Hall probe; 7. Rectangular block; 8. Protective tube; 81. Protective groove; 82. Fixing groove; 83. Fixing column; 84. Slide rail; 85. Slider; 86. Locking groove; 87. Spring groove; 88. Compression spring; 89. Movable block; 9. Storage block; 91. Limit block; 92. Plug-in hole; 10. Stop block; 101. Semicircular groove; 102. Slide groove; 103. Card block; 11. Charging seat; 111. Placement slot; 112. Charging terminal; 113. Charging plug; 114. Suction cup. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-6 In this embodiment: a DC magnetic field testing device for a magnetic field coil includes a device body 1, a display component is provided on the front end surface of the device body 1, a control button 3 is provided on the front end surface of the device body 1, a charging port 4 is provided at the bottom of the device body 1, a probe cable 5 is fixedly connected to the top of the device body 1, the other end of the probe cable 5 is fixedly connected to a Hall probe 6, a rectangular block 7 is fixedly connected to the outer surface of the Hall probe 6, a protective tube 8 is fixedly connected to the right side of the device body 1, a storage component is fixedly connected to the back of the device body 1, and a charging component is provided at the bottom of the device body 1.

[0028] In this embodiment, the display component includes a display screen 2, an indicator light 21 and a buzzer 22. The front face of the device body 1 is provided with a display screen 2, an indicator light 21 is provided on the top of the display screen 2, and a buzzer 22 is provided at the bottom of the display screen 2. A single-chip microcomputer is provided inside the device body 1, and the single-chip microcomputer is electrically connected to the display screen 2. There are three groups of indicator lights 21, which are linearly and evenly spaced. The three groups of indicator lights 21 are LED green light, LED yellow light and LED red light from left to right. The indicator light 21 is electrically connected to the single-chip microcomputer, and the buzzer 22 is electrically connected to the LED red light. The specific information of the magnetic field is displayed through the display screen 2. The information and the remaining power of the power supply are transmitted to the single-chip microcomputer. At this time, the single-chip microcomputer will turn on the corresponding indicator light 21 according to the remaining power. When the power is less than 50%, only the green LED light is on. When the power is less than 50% and greater than 10%, only the yellow LED light is on. When the power is less than 10%, not only the red LED light flashes, but also the buzzer 22 will sound an alarm to remind the user to charge the device. Through the above settings, the remaining power of the device can be observed more intuitively, and an alarm will be sounded when the power is too low, so that the device can be charged in time.The protective tube 8 includes a protective groove 81, a fixed groove 82, a fixed column 83, a slide rail 84, a slider 85, a locking groove 86, a spring groove 87, a compression spring 88 and a movable block 89. The top of the protective tube 8 is provided with a protective groove 81, a fixed groove 82 is provided on one side of the protective groove 81, a fixed column 83 is provided inside the fixed groove 82, a slide rail 84 is provided on the side surface of the protective groove 81, a slider 85 is provided inside the slide rail 84, a locking groove 86 is provided on the top of the slider 85, a spring groove 87 is provided on one side of the slide rail 84, and a spring The interior of the groove 87 is fixedly connected with a compression spring 88, and the other end of the compression spring 88 is fixedly connected with a movable block 89. The protective groove 81 is a rectangular groove connected to the circular groove. The inner diameter of the circular groove matches the outer surface size of the Hall probe 6, and the inner diameter of the rectangular groove matches the outer surface size of the rectangular block 7. The shape of the fixed column 83 is an "I" shape. The size of the middle connecting column of the fixed column 83 matches the inner diameter of the fixed groove 82. The bottom of the fixed column 83 is conical, and the shape of the slide rail 84 is a quarter-circular groove. The slider 85 is a fan-shaped block, and a rectangular groove is provided on the top of the slider 85. The size of the locking groove 86 matches the outer surface size of the fixed column 83. When the device is used, the Hall probe 6 is inserted into the inside of the protective tube 8 until the rectangular block 7 is inserted into the rectangular groove of the slider 85. Then, the Hall probe 6 is rotated to drive the slider 85 to slide inside the slide rail 84. When the slider 85 squeezes the movable block 89 into the inside of the spring groove 87, the fixed column 83 will be inserted into the locking groove 86 under the action of gravity, thereby locking the slider. 85 is fixed, and then the Hall probe 6 is fixed inside the protective tube 8, so as to protect the Hall probe 6. When the Hall probe 6 needs to be used, the fixed column 83 is pulled upward, and then the movable block 89 slides out of the spring groove 87 under the elastic force of the compression spring 88, so that the movable block 89 pushes the slider 85, and then the locking groove 86 is away from the bottom of the fixed column 83. At this time, the Hall probe 6 is rotated until its rectangular block 7 is located just below the rectangular groove of the protective groove 81, so that the Hall probe 6 can be pulled out of the protective tube 8;The storage component includes a storage block 9, a limiting block 91, a plugging hole 92, a stop block 10, a semi-circular groove 101, a sliding groove 102 and a clamping block 103. The back of the device body 1 is fixedly connected with the storage block 9. The side wall of the storage block 9 is fixedly connected with the limiting block 91. One side of the limiting block 91 is provided with the plugging hole 92. The rear end face of the storage block 9 is provided with the stop block 10. A semi-circular groove 101 is opened on the side of the stop block 10 close to the storage block 9. A sliding groove 102 is opened on the side of the stop block 10 close to the limiting block 91. The outer surface of the stop block 10 is provided with the clamping block 103. The number of the storage blocks 9 is four groups, and they are linearly and equally spaced. A storage groove is opened on the rear end face of the storage block 9. The inner diameter size of the storage groove matches the outer surface size of the probe cable 5. The number of the limiting blocks 91 is four groups. Two groups of limiting blocks 91 are fixedly connected to the right side wall of the rightmost storage block 9, and the other two groups of limiting blocks 91 are fixedly connected to the left side wall of the leftmost storage block 9. The shape of the limiting block 91 is "convex", and the protruding ends of the two groups of limiting blocks 91 are arranged oppositely. The number of the plugging holes 92 is two groups, and they are respectively arranged between the two groups of limiting blocks 91. The shape of the stop block 10 is "冂". The number of the sliding grooves 102 is four groups. The inner diameter size of the sliding groove 102 matches the outer surface size of the top of the limiting block 91. The shape of the clamping block 103 is "H". The number of the clamping blocks 103 is two groups, and they are respectively movably connected to the left and right side walls of the stop block 10. The end face size of the clamping block 103 matches the inner diameter size of the plugging hole 92. By placing the probe cable 5 in an S shape in the storage block 9 in sequence, then sleeving the sliding groove 102 of the stop block 10 on the protruding part of the limiting block 91, and then pushing the stop block 10 towards the storage block 9 until the stop block 10 contacts the storage block 9. At this time, push the clamping block 103 towards the plugging hole 92 until the clamping block 103 is inserted into the plugging hole 92, so as to fix the stop block 10 at the rear end of the storage block 9, and further fix the probe cable 5 in the storage block 9, so as to prevent the situation that the probe cable length is too long and the cables are wound together;The charging assembly includes a charging base 11, a placement slot 111, a charging end 112, a charging plug 113 and a suction cup 114. The charging base 11 is provided at the bottom of the device body 1, and a placement slot 111 is provided at the top of the charging base 11. The charging end 112 is fixedly connected to the placement slot 111. A charging plug 113 is provided on one side of the charging base 11. A suction cup 114 is fixedly connected to the bottom of the charging base 11. The outer surface size of the bottom end of the device body 1 matches the inner diameter size of the placement slot 111. The outer surface size of the charging end 112 matches the inner diameter size of the charging port 4. The charging end 112 is electrically connected to the charging plug 113. The charging plug 113 is a triangular plug. The number of suction cups 114 is several. The charging base 11 is arranged in a rectangular shape at the bottom of the charging base 11. The charging base 11 is placed in the appropriate position and then squeezed, so that the suction cup 114 is attracted to the contact surface, thereby fixing the charging base 11. The device body 1 is then inserted into the placement groove 111. At this time, the charging port 4 of the device body 1 will be plugged into the charging terminal 112. Then, the charging plug 113 is electrically connected to the socket, so that the charging base 11 can charge the device body 1. The suction cup 114 can fix the charging base 11 on the desktop, and the device body 1 is fixed to the charging base 11 through the placement groove 111. This prevents the device from falling during charging.

[0029] The working principle and use process of the present invention are as follows: the specific information of the magnetic field and the remaining power of the power supply are displayed on the display screen 2, and the information is transmitted to the single-chip microcomputer. At this time, the single-chip microcomputer will turn on the corresponding indicator light 21 according to the remaining power. When the power is less than 50%, only the green LED light is on. When the power is less than 50% and greater than 10%, only the yellow LED light is on. When the power is less than 10%, not only the red LED light flashes, but also the buzzer 22 will sound an alarm to remind the user to charge the device. When the detection is completed, the probe cable 5 is placed in the storage block 9 in an S shape, and then the slide slot 1 of the block 10 is moved. 02 is sleeved on the raised part of the limit block 91, and then the stopper 10 is pushed toward the direction of the receiving block 9 until the stopper 10 contacts the receiving block 9. At this time, the card block 103 is pushed toward the direction of the plug hole 92 until the card block 103 is plugged into the inside of the plug hole 92, thereby fixing the stopper 10 at the rear end of the receiving block 9, and then fixing the probe cable 5 in the receiving block 9, so as to prevent the probe cable 5 from being too long and causing the cables to be entangled. Then, the Hall probe 6 is inserted into the inside of the protective tube 8 until the rectangular block 7 is inserted into the rectangular groove of the slider 85, and then the Hall probe 6 is rotated to drive the slider 85 to slide inside the slide rail 84. When the slider 85 When the movable block 89 is squeezed into the spring groove 87, the fixed column 83 will be inserted into the locking groove 86 under the action of gravity, thereby fixing the slider 85 and then fixing the Hall probe 6 inside the protective tube 8, so as to protect the Hall probe 6. When the Hall probe 6 needs to be used, the fixed column 83 is pulled upward, and then the movable block 89 will slide out of the spring groove 87 under the elastic force of the compression spring 88, so that the movable block 89 pushes the slider 85, and then the locking groove 86 is away from the bottom of the fixed column 83. At this time, the Hall probe 6 is rotated until its rectangular block 7 is located directly below the rectangular groove of the protective groove 81, so that the Hall probe 6 can be pulled out of the protective tube. The tube 8 is placed in a suitable position through the charging seat 11 when charging is needed, and then the charging seat 11 is squeezed so that the suction cup 114 is adsorbed with the contact surface, thereby fixing the charging seat 11, and then the device body 1 is inserted into the inside of the placement groove 111. At this time, the charging port 4 of the device body 1 will be plugged into the charging end 112, and then the charging plug 113 is electrically connected to the socket, so that the charging seat 11 can charge the device body 1, and the charging seat 11 can be fixed on the desktop through the provided suction cup 114, and the device body 1 is fixed on the charging seat 11 through the provided placement groove 111, so as to prevent the device from falling during charging.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A DC magnetic field test device for a magnetic field coil, characterized in that: The device comprises a device body (1), a display assembly is provided on the front face of the device body (1), a control button (3) is provided on the front face of the device body (1), a charging port (4) is provided on the bottom of the device body (1), a probe cable (5) is fixedly connected to the top of the device body (1), a Hall probe (6) is fixedly connected to the other end of the probe cable (5), a rectangular block (7) is fixedly connected to the outer surface of the Hall probe (6), a protective tube (8) is fixedly connected to the right side of the device body (1), a storage assembly is fixedly connected to the back of the device body (1), and a charging assembly is provided on the bottom of the device body (1); The protective tube (8) includes a protective groove (81), a fixed groove (82), a fixed column (83), a slide rail (84), a slider (85), a locking groove (86), a spring groove (87), a compression spring (88) and a movable block (89). The top of the protective tube (8) is provided with a protective groove (81), one side of the protective groove (81) is provided with a fixed groove (82), the interior of the fixed groove (82) is provided with a fixed column (83), the side surface of the protective groove (81) is provided with a slide rail (84), the interior of the slide rail (84) is provided with a slider (85), the top of the slider (85) is provided with a locking groove (86), one side of the slide rail (84) is provided with a spring groove (87), the interior of the spring groove (87) is fixedly connected with a compression spring (88), and the other end of the compression spring (88) is fixedly connected with a movable block (89); The protective groove (81) is a rectangular groove connected to the circular groove, the inner diameter of the circular groove matches the outer surface size of the Hall probe (6), the inner diameter of the rectangular groove matches the outer surface size of the rectangular block (7), the shape of the fixed column (83) is "I"-shaped, the size of the middle connecting column of the fixed column (83) matches the inner diameter of the fixed groove (82), the bottom of the fixed column (83) is conical, the shape of the slide rail (84) is a quarter-circular groove, the slider (85) is a fan-shaped block, the top of the slider (85) is provided with a rectangular groove, and the size of the locking groove (86) matches the outer surface size of the fixed column (83).

2. A DC magnetic field testing device for a magnetic field coil according to claim 1, characterized in that: The display assembly comprises a display screen (2), an indicator light (21) and a buzzer (22); the front face of the device body (1) is provided with a display screen (2); the top of the display screen (2) is provided with an indicator light (21); and the bottom of the display screen (2) is provided with a buzzer (22).

3. A DC magnetic field testing device for a magnetic field coil according to claim 2, characterized in that: A single-chip microcomputer is provided inside the device body (1), and the single-chip microcomputer is electrically connected to the display screen (2). The indicator lights (21) are in three groups and are linearly and evenly spaced. The three groups of indicator lights (21) are LED green lights, LED yellow lights, and LED red lights from left to right. The indicator lights (21) are electrically connected to the single-chip microcomputer, and the buzzer (22) is electrically connected to the LED red light.

4. The DC magnetic field testing device for a magnetic field coil according to claim 1, characterized in that: The storage component includes a storage block (9), a limit block (91), a plugging hole (92), a stop block (10), a semi-circular groove (101), a sliding groove (102) and a clamping block (103). A storage block (9) is fixedly connected to the back of the device main body (1). A limit block (91) is fixedly connected to the side wall of the storage block (9). A plugging hole (92) is arranged on one side of the limit block (91). A stop block (10) is arranged on the rear end face of the storage block (9). A semi-circular groove (101) is opened on the side of the stop block (10) close to the storage block (9). A sliding groove (102) is opened on the side of the stop block (10) close to the limit block (91). A clamping block (103) is arranged on the outer surface of the stop block (10).

5. A DC magnetic field testing device for a magnetic field coil according to claim 4, characterized in that: There are four groups of the storage blocks (9), and they are linearly and equally spaced. A storage groove is opened on the rear end face of the storage block (9). The inner diameter dimension of the storage groove matches the outer surface dimension of the probe cable (5). There are four groups of the limit blocks (91). Two groups of the limit blocks (91) are fixedly connected to the right side wall of the rightmost storage block (9). The other two groups of the limit blocks (91) are fixedly connected to the left side wall of the leftmost storage block (9). The shape of the limit block (91) is "convex", and the protruding ends of the two groups of limit blocks (91) are arranged oppositely. There are two groups of the plugging holes (92), and they are respectively arranged between the two groups of limit blocks (91). The shape of the stop block (10) is "冂". There are four groups of the sliding grooves (102). The inner diameter dimension of the sliding groove (102) matches the outer surface dimension of the top of the limit block (91). The shape of the clamping block (103) is "H". There are two groups of the clamping blocks (103), and they are respectively movably connected to the left and right side walls of the stop block (10). The end face dimension of the clamping block (103) matches the inner diameter dimension of the plugging hole (92).

6. The DC magnetic field testing device for a magnetic field coil according to claim 1, characterized in that: The charging component includes a charging base (11), a placement groove (111), a charging end (112), a charging plug (113) and a suction cup (114). A charging base (11) is arranged at the bottom of the device main body (1). A placement groove (111) is opened on the top of the charging base (11). A charging end (112) is fixedly connected inside the placement groove (111). A charging plug (113) is arranged on one side of the charging base (11). A suction cup (114) is fixedly connected to the bottom of the charging base (11).

7. A DC magnetic field testing device for a magnetic field coil according to claim 6, characterized in that: The outer surface dimension of the bottom end of the device main body (l) matches the inner diameter dimension of the placement groove (111). The outer surface dimension of the charging end (112) matches the inner diameter dimension of the charging port (4). The charging end (112) is electrically connected to the charging plug (113). The charging plug (113) is a triangular plug. There are several groups of the suction cups (114), and they are distributed in a rectangle at the bottom of the charging base (11).

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