Sensor for magnetic field measurement and use method thereof

Abstract

The invention discloses a sensor for magnetic field measurement and a use method thereof, and relates to the technical field of magnetic field sensors, the front side of a probe shell is detachably connected with a measuring head, the front end of the measuring head is provided with a magnetic sensor, the outer side of the measuring head is sleeved with a sleeve, and the bottom of the front side of the sleeve is fixedly connected with an upper cylinder. According to the sensor for magnetic field measurement and the use method thereof, the upper column body, the lower column body, the elastic body, the connecting rope and the telescopic device are arranged, the connecting rope pulls the front side of the elastic plate to bend downwards, the opposite faces of the upper column body and the lower column body do not make contact, and the upper column body rotates around the shaft rod; the magnetic field sensor is kept at the same position, the orientation of the measuring head can be stably changed, the deviation condition of the measuring head is reduced, the measuring accuracy is improved, the distance between the fixing frame and the elastic plate can be changed, the measuring horizontal position of the measuring head is changed, all positions of the magnetic field of the magnet are measured, and the acceptance inspection efficiency of the magnet is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic field sensors, and in particular to a sensor for measuring magnetic field and a method of using the sensor. Background Art

[0002] A magnetic field sensor is a sensor that can convert various magnetic fields and their changes into magnetic field signal outputs. The magnetic field sensor is generally set at the probe of a magnetic field measuring device. The probe is placed or suspended on the surface of a magnet, and then the measured magnetic induction intensity value is read on the device.

[0003] However, the probes of most magnetic field measuring devices are moved by hand, and the probe placement will shift during the measurement process. The measurement accuracy is affected by the measurement position and angle of the probe. Therefore, it is difficult to ensure the measurement accuracy of the magnetic induction intensity of the magnet, which affects the acceptance efficiency of the magnet.

[0004] In order to solve the deficiencies of the prior art, we propose a sensor for measuring magnetic field and a method for using the same. Summary of the invention

[0005] The main purpose of the present invention is to provide a sensor for measuring magnetic field and a method of using the same, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A sensor for measuring magnetic field, including a probe housing, a probe detachably connected to the front side of the probe housing, a magnetic sensor installed at the front end of the probe, a sleeve sleeved on the outside of the probe, an upper cylinder fixedly connected to the bottom of the front side of the sleeve, a lower cylinder rotatably connected to the bottom of the upper cylinder, a shaft fixedly connected to the axis of the lower cylinder, the opposite surfaces of the upper cylinder and the lower cylinder are arranged in an irregular shape, the top of the shaft extends into the upper cylinder, the bottom of the shaft fixedly connected to an elastic plate, a fixing frame is installed on the rear side of the elastic plate, and a fixing frame is arranged between the fixing frame and the elastic plate. A telescopic device is provided, a plurality of suction cup devices are fixedly connected to the bottom surface of the rear side of the fixing frame, a plurality of fixing blocks are installed between the suction cup devices, a connecting rope passes through the inside of the fixing block, one end of the connecting rope is fixedly connected to the bottom surface of the front side of the elastic plate, and the other end of the connecting rope is fixedly connected to a ring, a flat plate is provided on the top surface of the fixing frame, a semi-elliptical ring is detachably connected to the top surface of the flat plate, a supporting device is detachably connected to the front side of the probe housing, a wire is fixedly connected to the axis of the front side of the probe housing, and the tail of the wire passes through the supporting device and is detachably connected to a display device.

[0008] Preferably, a valve block is installed on the top surface of the suction cup device, and a plurality of top blocks are fixedly connected to the bottom surface of the flat plate, and the top blocks are embedded with the valve block.

[0009] Preferably, a protruding block is fixedly connected to the top surface of the fixing frame, a sliding groove is provided on the surface of the flat plate, the protruding block is slidably connected inside the sliding groove, a groove is provided on the side surface of the protruding block, and the groove is embedded in the circular ring.

[0010] Preferably, the supporting device includes a mounting plate, which is detachably connected to the rear side of the probe housing, a No. 1 L-shaped plate is fixedly connected to the side of the mounting plate, a connecting rod is slidably connected to the side of the No. 1 L-shaped plate, a No. 2 L-shaped plate is fixedly connected to the bottom of the connecting rod, and a No. 1 return spring is sleeved on the top of the connecting rod.

[0011] Preferably, a plurality of ball bearings are rotatably connected to the bottom surface of the second L-shaped plate.

[0012] Preferably, the telescopic device includes a No. 1 plate, a symmetrical No. 2 rod is fixedly connected to the rear side of the telescopic plate, a limiting groove is provided on the front side of the fixed frame, a plurality of No. 1 semicircular blocks are fixedly connected to the left and right sides of the limiting groove, a plurality of No. 2 semicircular blocks are fixedly connected to the outer side of the No. 2 rod, and the No. 1 semicircular blocks are embedded with the No. 2 semicircular blocks.

[0013] A method for using a magnetic field measuring sensor is used to implement a magnetic field measuring sensor, specifically comprising the following steps:

[0014] S1: The magnetic field sensor is connected to the display device through a wire, the zero adjustment button on the display device is pressed to zero the magnetic field sensor, and then the probe of the magnetic field sensor is extended to a certain position on the surface of the magnet;

[0015] S2: Press the semi-elliptical ring downward, the flat plate squeezes the suction cup device to make the fixing frame adsorbed on the desktop, pull the connecting rope and bend the front side of the elastic plate downward, so that the upper column and the lower column opposite surfaces do not contact, the upper column can rotate around the shaft, the magnetic field sensor is in the same position, and the orientation of the probe is changed;

[0016] S3: Observe and record the measurement data. Since the magnetic sensor measures the component of the magnetic field along the axis, the direction of the maximum value is the direction of the magnetic field.

[0017] S4: With the help of the telescopic device, the distance between the fixed frame and the elastic body is changed to change the measuring position and angle of the probe, and each position of the magnetic field of the magnet is measured. The data in the display device is imported into the computer through the connecting line, and a drawing is drawn to show the distribution of magnetic induction intensity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the suction cup device, the upper column, the lower column, the elastic body and the connecting rope are provided, the suction cup device fixes the fixing frame on the desktop, and the connecting rope is pulled, and the connecting rope pulls the front side of the elastic plate to bend downward, and the upper column and the lower column The opposite surfaces are not in contact, and the supporting device is pushed, so that the upper column can rotate around the shaft rod, so that the magnetic field sensor maintains the same position and can smoothly change the orientation of the probe, thereby reducing the position and angle deviation of the probe during the measurement process, which is beneficial to improving the accuracy of measuring the magnetic induction intensity value of the magnet.

[0020] 2. In the present invention, the telescopic device is provided, which can change the distance between the fixed frame and the elastic plate, so that the measuring horizontal position of the probe changes. In conjunction with the rotatable upper cylinder, each position of the magnet's magnetic field can be measured, which is beneficial to improving the acceptance efficiency of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the magnetic field measurement sensor of the present invention;

[0022] Figure 2 is a flow chart of a method for using the magnetic field measurement sensor of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the probe housing of the present invention;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0025] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 6 It is a schematic diagram of the related structure of the limiting groove of the present invention;

[0027] Figure 7 It is a schematic diagram of the relevant structure of the support device of the present invention;

[0028] Figure 8 It is a schematic diagram of the ball-related structure of the present invention;

[0029] Fig. 9 It is a schematic diagram of the related structure of the semi-elliptical ring of the present invention.

[0030] In the figure: 1. probe housing; 11. probe; 12. sleeve; 2. upper cylinder; 21. lower cylinder; 22. shaft; 3. elastic plate; 31. fixing frame; 32. raised block; 33. groove; 4. telescopic device; 41. plate No. 1; 42. rod No. 2; 43. limit groove; 44. semicircular block No. 1; 45. semicircular block No. 2; 5. suction cup device; 51. valve block; 6. fixing block; 61. connecting rope; 62. ring; 7. flat plate; 71. top block; 72. slide groove; 73. semi-elliptical ring; 8. supporting device; 81. mounting plate; 82. L-shaped plate No. 1; 83. connecting rod; 84. L-shaped plate No. 2; 85. ball; 86. reset spring No. 1; 9. wire; 91. display device. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] A sensor for measuring magnetic field comprises a probe housing 1, a probe head 11 is detachably connected to the front side of the probe housing 1, a magnetic sensor is installed at the front end of the probe head 11, a sleeve 12 is sleeved on the outer side of the probe head 11, an upper cylinder 2 is fixedly connected to the bottom of the front side of the sleeve 12, a lower cylinder 21 is rotatably connected to the bottom of the upper cylinder, a shaft 22 is fixedly connected to the axis of the lower cylinder 21, the opposite surface of the upper cylinder 2 and the lower cylinder 21 is set to an irregular shape, the top of the shaft 22 extends into the upper cylinder 2, the bottom of the shaft 22 is fixedly connected to an elastic plate 3, a fixing frame 31 is installed on the rear side of the elastic plate 3, and a fixing frame 31 is arranged between the fixing frame 31 and the elastic plate 3. A telescopic device 4 is provided, a plurality of suction cup devices 5 are fixedly connected to the bottom surface of the rear side of the fixed frame 31, a plurality of fixed blocks 6 are installed between the suction cup devices 5, a connecting rope 61 runs through the inside of the fixed block 6, one end of the connecting rope 61 is fixedly connected to the bottom surface of the front side of the elastic plate 3, and the other end of the connecting rope 61 is fixedly connected to a ring 62, a flat plate 7 is provided on the top surface of the fixed frame 31, and a semi-elliptical ring 73 is detachably connected to the top surface of the flat plate 7, a supporting device 8 is detachably connected to the front side of the probe housing 1, a conducting wire 9 is fixedly connected to the axis center of the front side of the probe housing 1, and the tail of the conducting wire 9 runs through the supporting device 8 and is detachably connected to a display device 91.

[0033] like Figure 1 As shown, the probe housing 1 is electrically connected to the display device 91 through the wire 9, and the display device 91 is provided with a display screen and a mode change button, the display screen is used to display the magnetic induction intensity value measured by the magnetic field sensor, and the mode change button is used to switch into the magnetic induction intensity measurement mode or the magnetic induction direction measurement mode, wherein the display device 91 is provided with a socket at the bottom, and the socket can be connected to the computer through a data cable, and the measured data can be graphically drawn through the software on the computer, which is conducive to a more intuitive expression of the measured value;

[0034] like Figure 1 and Figure 3 As shown, a probe 11 is detachably connected to the front side of the probe housing 1, a magnetic field sensor is located at the front end of the probe 11, a sleeve 12 is sleeved on the outside of the probe 11, the sleeve 12 is hollow inside, so that the probe 11 is protected at the axis of the sleeve 12, the sleeve 12 is made of plastic material, and there are no defects such as bubbles or impurities on the surface of the sleeve 12, so as to reduce the interference of the sleeve 12 on the probe 11 during measurement, wherein the rear side of the sleeve 12 is set as an opening, and the rear side of the sleeve 12 is threadedly connected to the front side of the probe;

[0035] like Figure 1 As shown and Figure 3-Figure 5 As shown, an upper cylinder 2 is fixedly connected to the bottom of the front side of the sleeve 12, a lower cylinder 21 is arranged at the bottom of the upper cylinder 2, a shaft 22 is arranged at the axis of the lower cylinder 21, and a shaft 22 is fixedly connected to the axis of the lower cylinder 21. The upper cylinder 2, the lower cylinder 21 and the shaft 22 are at the same center of a circle, and the opposite surfaces of the upper cylinder 2 and the lower cylinder 21 are set to irregular shapes. For example, the opposite surfaces of the upper cylinder 2 and the lower cylinder 21 are provided with a plurality of protrusions, and the two are fitted with each other. The top of the shaft 22 extends into the upper cylinder 2, and the bottom of the shaft 22 is fixedly connected to the elastic plate 3. If the opposite surfaces of the upper cylinder 2 and the lower cylinder 21 are not fitted, the shaft 22 can rotate around the upper cylinder 2, and on the contrary, if the upper cylinder 2 and the lower cylinder 21 are fitted, the shaft 22 cannot rotate around the upper cylinder 2.

[0036] like Figure 3-Figure 5 As shown, the elastic plate 3 is installed on the front side of the fixing frame 31, and the front half of the elastic plate 3 can be regarded as a cantilever relative to the fixing frame 31. At the same time, the elastic plate 3 is made of plastic material, which is the same as the material and process of the sleeve 12, so that the front half of the elastic plate 3 has a certain elasticity. One end of the connecting rope 61 is connected to the bottom surface of the front side of the elastic plate 3, and the other end is fixedly connected with a ring 62. The connecting rope 61 is installed on the bottom surface of the fixing frame 31 through a plurality of fixing blocks 6. The connecting rope 61 passes through the plurality of fixing blocks 6, and the connecting rope 61 is pulled by the ring 62, so that the connecting rope 61 has a traction force on the front side of the elastic plate 3, and the front side of the elastic plate 3 is bent downward, so that the upper column 2 and the lower column 21 are not in engagement;

[0037] like Figure 3 As shown, a plurality of suction cup devices 5 are evenly arranged on the bottom surface of the fixing frame 31, and the semi-elliptical ring 73 is sleeved on the outside of the thickest part of the probe housing 1. At the same time, the vertical section length of the semi-elliptical ring 73 is greater than the vertical section length of the thickest part of the probe housing 1, so the semi-elliptical ring 73 can move forward and backward and up and down at the thickest part of the probe housing 1. When the fixing frame 31 moves to a suitable position, the semi-elliptical ring 73 is pressed downward, so that the semi-elliptical ring 73 drives the flat plate 7 to press the fixing frame 31 downward, so that the suction cup devices 5 are squeezed and in a negative pressure, so that the plurality of suction cup devices 5 adsorb the fixing frame 31 on the desktop or other contact surfaces;

[0038] like Figure 3-Figure 5 As shown and Fig. 9 As shown, a plurality of top blocks 71 may also be installed on the bottom surface of the flat plate 7. The top blocks 71 are in the shape of a truncated cone trapezoid, wherein the top surface of each suction cup device 5 is detachably connected to a valve block 51. A cross groove is provided at the axis of the valve block 51, which may also be a groove of other shapes. The flat plate 7 is driven to move by the semi-elliptical ring 73, so that the top block 71 and the valve block 51 are misaligned. The bottom surface of the top block 71 contacts the top surface of the fixing frame 31, and the semi-elliptical ring 73 is pressed downward, so that the flat plate 7 compresses the suction cup device 5 at the bottom of the fixing frame 31 through the top block 71, so that the suction cup device 5 is adsorbed. Conversely, when the top block 71 and the valve block 51 overlap, the semi-elliptical ring 73 is pressed downward, and the top block 71 will extend toward the axis of the valve block 51 to destroy the sealing state of the valve block 51, thereby releasing the adsorption effect of the suction cup device 5, thereby facilitating the installation and removal of the fixing frame 31.

[0039] like Figure 3-Figure 5 As shown, a symmetrical raised block 32 is provided at the rear corner of the top surface of the fixing frame 31, and symmetrical sliding grooves 72 are provided on the left and right sides of the bottom surface of the flat plate 7. The raised block 32 slides in the corresponding sliding groove 72 to limit the direction in which the flat plate 7 moves on the top surface of the fixing frame 31. Since the vertical section length of the semi-elliptical ring 73 is greater than the vertical section length of the thickest part of the probe housing 1, when the semi-elliptical ring 73 is lifted, the semi-elliptical ring 73 can drive the flat plate 7 to move upward, so that the raised block 32 is disengaged. The slide groove 72 releases the restriction of the protruding block 32 and the slide groove 72 on the flat plate 7; at the same time, the ring 62 is made of rubber material, and a groove 33 is provided on the side of the protruding block 32. The connecting rope 61 is pulled so that the connecting rope 61 drives the front side of the elastic plate 3 to bend downward, and the upper column 2 can rotate around the shaft 22. The excess part of the tail of the connecting rope 61 is wrapped around the outside of the symmetrical protruding block 32. At the same time, the ring 62 is sleeved on the groove 33, so that the upper column 2 and the lower column 21 are kept separated, which is convenient for changing the orientation of the probe 11.

[0040] like Figure 7-Figure 8As shown, the supporting device 8 is detachably connected to the rear side of the probe housing 1 to support the end of the probe housing 1, so as to facilitate the left and right rotation and the forward and backward movement of the probe housing 1, and also facilitate the probe housing 1 to be hung on the top of the display device 91 housing after the measurement is completed; specifically, a mounting plate 81 is detachably connected to the rear side of the probe housing 1, one side of the No. 1 L-shaped plate 82 is fixedly connected to the mounting plate 81, and the other side is internally slidably connected to a connecting rod 83, which passes through the vertical part of the No. 1 L-shaped plate 82 and extends to the outside, a No. 1 return spring 86 is sleeved on the top of the connecting rod 83 and is located at the extended part of the connecting rod 83, and a No. 2 L-shaped plate 84 is fixedly connected to the bottom of the connecting rod 83, and when the No. 1 return spring 86 is in compression, the distance between the vertical part of the No. 1 L-shaped plate 82 and the vertical part of the No. 2 L-shaped plate 84 increases, and conversely, when the No. 2 return spring is in relaxation, the No. 1 return spring 86 is in compression, and the No. 2 return spring is in compression. The distance between the vertical part of the L-shaped plate 82 and the vertical part of the second L-shaped plate 84 tends to be initial; when working, the vertical part of the second L-shaped plate 84 and the suction cup device 5 support the probe housing 1. The difference is that the vertical part of the second L-shaped plate 84 is movable, and the suction cup device 5 is not movable. Initially, the distance between the vertical part of the first L-shaped plate 82 and the vertical part of the second L-shaped plate 84 can be expanded. Under the action of the first reset spring 86, the two are clamped and fixed on the top of the display device 91 housing. The suction cup device 5 can also be pressed to make the suction cup device 5 adsorb the side of the display device 91 housing, so that the probe housing 1 is stably installed on the display device 91 housing. The length of the vertical part of the second L-shaped plate 84 is longer than the length of the vertical part of the first L-shaped plate 82, which increases the contact area between the second L-shaped plate 84 and the contact surface, which is beneficial to improving the stability of the movement of the probe housing 1.

[0041] like Figure 8 As shown, a plurality of balls 85 may be rotatably connected to the bottom surface of the vertical portion of the second L-shaped plate 84. The plurality of balls 85 are evenly arranged, which is beneficial to improving the smoothness of the movement of the second L-shaped plate 84 on the contact surface.

[0042] like Figure 3 and Figure 6As shown, the telescopic device 4 can adjust the distance between the elastic plate 3 and the fixing frame 31, and the connecting rope 61 is also made of rubber material to adapt to the change between the elastic plate 3 and the fixing plate; specifically, the limiting groove 43 is opened on the front side of the fixing frame 31, and a plurality of No. 1 semicircular blocks 44 are evenly arranged on the left and right sides of the limiting groove 43. The front side of the No. 1 plate 41 is fixedly connected to the rear side of the elastic plate 3, and the rear side of the No. 1 plate 41 is fixedly connected to the symmetrical No. 2 rod 42, and there is a spacing between the No. 2 rod 42, so that the symmetrical No. 2 rod 4 2 can be elastically moved toward the axis of the No. 1 plate 41. If the No. 2 rod 42 is squeezed, the No. 2 rod 42 can be offset toward the axis of the No. 1 plate 41. A plurality of No. 2 semicircular blocks 45 are fixedly connected to the outer side of the No. 2 rod 42. The No. 2 semicircular blocks 45 can be clamped between adjacent No. 1 semicircular blocks 44. The symmetrical No. 2 rods 42 are squeezed inwardly to make the No. 2 semicircular blocks 45 separate from between the No. 1 semicircular blocks 44. Then, the supporting device 8 is pushed, and the No. 1 plate 41 can move outward, thereby changing the distance between the elastic plate 3 and the fixing frame 31.

[0043] like Figure 2 As shown, a method for using a magnetic field measuring sensor is used to implement a magnetic field measuring sensor, specifically comprising the following steps:

[0044] S1: The magnetic field sensor is connected to the display device 91 through the wire 9, the zero adjustment button on the display device 91 is pressed to zero the magnetic field sensor, and then the probe 11 of the magnetic field sensor is extended to a certain position on the surface of the magnet;

[0045] S2: Press the semi-elliptical ring 73 downward, the flat plate 7 squeezes the suction cup device 5 to make the fixing frame 31 adsorbed on the table, pull the connecting rope 61 and bend the front side of the elastic plate 3 downward, so that the upper column 2 and the lower column 21 do not contact each other, the upper column 2 can rotate around the shaft 22, the magnetic field sensor is in the same position, and the orientation of the probe 11 is changed;

[0046] S3: Observe and record the measurement data. Since the magnetic sensor measures the component of the magnetic field along the axis, the direction of the maximum value is the direction of the magnetic field.

[0047] S4: Cooperating with the telescopic device 4, the distance between the fixing frame 31 and the elastic body is changed to change the measuring position and angle of the probe 11, and each position of the magnetic field of the magnet is measured. The data in the display device 91 is imported into the computer through the connecting line, and a drawing is drawn to show the distribution of the magnetic induction intensity.

[0048] It should be noted that the present invention is a sensor for measuring magnetic field and a method of using the same. Figure 1-Figure 8As shown, when in use, the magnet to be measured is placed on the desktop, the fixing frame 31 is moved to a suitable position and the front side of the probe 11 extends to a certain position on the surface of the magnet, and then the semi-elliptical ring 73 is pressed downward, and the semi-elliptical ring 73 squeezes the fixing frame 31 through the flat plate 7, so that the suction cup device 5 adsorbs the desktop, thereby fixing the position of the fixing frame 31, and then the connecting rope 61 is pulled through the ring 62, and the connecting rope 61 exerts a traction force on the front side of the elastic plate 3, so that the front side of the elastic plate 3 bends downward, and the upper cylinder 2 and the lower cylinder 21 The opposite surfaces do not contact, the upper cylinder 2 can rotate around the shaft 22, so that the magnetic field sensor at the front end of the probe 11 is in the same position, thereby steadily changing the orientation of the probe 11, which is beneficial to reducing the position and angle deviation of the probe 11 during the measurement process, and improving the accuracy of the magnetic induction intensity value of the measured magnet. At the same time, the telescopic device 4 can change the distance between the fixing frame 31 and the elastic plate 3, and each position of the magnetic field of the magnet can be measured, and the measuring position and angle of the probe 11 can be steadily changed, which is beneficial to improving the acceptance efficiency of the magnet.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sensor for measuring a magnetic field, characterized in that: The invention comprises a probe housing (1), wherein a probe head (11) is detachably connected to the front side of the probe housing (1), a magnetic sensor is installed at the front end of the probe head (11), a sleeve (12) is sleeved on the outside of the probe head (11), an upper column (2) is fixedly connected to the bottom of the front side of the sleeve (12), a lower column (21) is rotatably connected to the bottom of the upper column, a shaft (22) is fixedly connected to the axis of the lower column (21), the opposite surfaces of the upper column (2) and the lower column (21) are arranged in an irregular shape, the top of the shaft (22) extends into the upper column (2), the bottom of the shaft (22) is fixedly connected to an elastic plate (3), a fixing frame (31) is installed on the rear side of the elastic plate (3), and a telescopic device is arranged between the fixing frame (31) and the elastic plate (3). (4), a plurality of suction cup devices (5) are fixedly connected to the bottom surface of the rear side of the fixing frame (31), a plurality of fixing blocks (6) are installed between the suction cup devices (5), a connecting rope (61) runs through the inside of the fixing block (6), one end of the connecting rope (61) is fixedly connected to the bottom surface of the front side of the elastic plate (3), and the other end of the connecting rope (61) is fixedly connected to a ring (62), a flat plate (7) is arranged on the top surface of the fixing frame (31), and a semi-elliptical ring (73) is detachably connected to the top surface of the flat plate (7), a supporting device (8) is detachably connected to the front side of the probe housing (1), a conducting wire (9) is fixedly connected at the axis of the front side of the probe housing (1), and the tail of the conducting wire (9) runs through the supporting device (8) and is detachably connected to a display device (91).

2. A magnetic field measuring sensor according to claim 1, characterized in that: The top surface of the suction cup device (5) is installed with a valve block (51), and the bottom surface of the flat plate (7) is fixedly connected with a plurality of top blocks (71), and the top blocks (71) are embedded with the valve block (51).

3. A magnetic field measuring sensor according to claim 2, characterized in that: A protruding block (32) is fixedly connected to the top surface of the fixing frame (31), a sliding groove (72) is provided on the surface of the flat plate (7), the protruding block (32) is slidably connected inside the sliding groove (72), a groove (33) is provided on the side surface of the protruding block (32), and the groove (33) is embedded in the ring (62).

4. A magnetic field measuring sensor according to claim 1, characterized in that: The supporting device (8) comprises a mounting plate (81), wherein the mounting plate (81) is detachably connected to the rear side of the probe housing (1), a first L-shaped plate (82) is fixedly connected to the side of the mounting plate (81), a connecting rod (83) is slidably connected to the side of the first L-shaped plate (82), a second L-shaped plate (84) is fixedly connected to the bottom of the connecting rod (83), and a first return spring (86) is sleeved on the top of the connecting rod (83).

5. A magnetic field measuring sensor according to claim 4, characterized in that: The bottom surface of the second L-shaped plate (84) is rotatably connected to a plurality of balls (85).

6. A magnetic field measuring sensor according to claim 1, characterized in that: The telescopic device (4) comprises a first plate (41), a symmetrical second rod (42) is fixedly connected to the rear side of the telescopic plate, a limiting groove (43) is provided on the front side of the fixed frame (31), a plurality of first semicircular blocks (44) are fixedly connected to the left and right sides of the limiting groove (43), a plurality of second semicircular blocks (45) are fixedly connected to the outer side of the second rod (42), and the first semicircular blocks (44) are embedded with the second semicircular blocks (45).

7. A method for using a magnetic field measuring sensor, characterized in that it is used to implement a magnetic field measuring sensor according to any one of claims 1 to 6, specifically comprising the following steps: S1: The magnetic field sensor is connected to the display device (91) via a wire (9), a zero adjustment button on the display device (91) is pressed to zero the magnetic field sensor, and then the probe (11) of the magnetic field sensor is extended to a certain position on the surface of the magnet; S2: Press the semi-elliptical ring (73) downward, the flat plate (7) squeezes the suction cup device (5) to make the fixing frame (31) adsorbed on the table, pull the connecting rope (61) and bend the front side of the elastic plate (3) downward, so that the upper column (2) and the lower column (21) are not in contact with each other, the upper column (2) can rotate around the shaft (22), the magnetic field sensor is in the same position, and the orientation of the probe (11) is changed; S3: Observe and record the measurement data. Since the magnetic sensor measures the component of the magnetic field along the axis, the direction of the maximum value is the direction of the magnetic field. S4: By cooperating with the telescopic device (4), the distance between the fixing frame (31) and the elastic body is changed, so that the measuring position and angle of the probe (11) are changed, and each position of the magnetic field of the magnet is measured. The data in the display device (91) is imported into the computer through the connecting line, and a drawing is drawn to show the distribution of the magnetic induction intensity.

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