A sensor for measuring magnetic field and method of using the same

Abstract

The present invention discloses a sensor for measuring magnetic field and a method for using the same, and relates to the technical field of magnetic field sensors. The front side of the probe housing is detachably connected to a probe, a magnetic sensor is installed at the front end of the probe, a sleeve is sleeved on the outside of the probe, and an upper cylinder is fixedly connected to the bottom of the front side of the sleeve. The sensor for measuring magnetic field of the present invention and a method for using the same, by providing an upper cylinder, a lower cylinder, an elastic body, a connecting rope and a telescopic device. The connecting rope pulls the front side of the elastic plate to bend downward, the upper cylinder and the lower cylinder are not in contact with each other, and the upper cylinder rotates around the shaft, so that the magnetic field sensor remains in the same position and the orientation of the probe can be changed smoothly, thereby reducing the deviation of the probe and improving the measurement accuracy. The spacing between the fixing frame and the elastic plate can be changed, and the horizontal measurement position of the probe is changed. The various positions of the magnetic field of the magnet are measured, which is conducive to improving the acceptance efficiency of the magnet.

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 installed at the probe of a magnetic field measuring device. The probe is placed or suspended on the surface of a magnet, and the measured magnetic induction intensity value is then 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 address 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 and, comprising 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 set to 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 bracket is installed on the rear side of the elastic plate, and a fixing bracket is arranged between the fixing bracket and the elastic plate. A telescopic device is provided, and 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, and one end of the connecting rope is fixedly connected to the bottom surface of the front side of the elastic plate. 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, and a semi-elliptical ring is detachably connected to the top surface of the flat plate. The front side of the probe housing is detachably connected to a supporting device, and a wire is fixedly connected to the axis center of the front side of the probe housing. 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 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 fixedly connected to the side of the mounting plate, a No. 1 L-shaped plate slidingly connected to the side of the No. 1 L-shaped plate, a No. 2 L-shaped plate fixedly connected to the bottom of the connecting rod, and a No. 1 return spring sleeved on the top of the connecting rod.

[0011] Preferably, a plurality of balls 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 fixing 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, for executing a magnetic field measuring sensor, specifically comprises the following steps:

[0014] S1: The magnetic field sensor is connected to the display device through a wire. Press the zero adjustment button on the display device to zero the magnetic field sensor. Then, extend the probe of the magnetic field sensor to a certain position on the surface of the magnet.

[0015] S2: Press the semi-elliptical ring downward, and the flat plate squeezes the suction cup device to adsorb the fixed frame on the table. Pull the connecting rope and bend the front side of the elastic plate downward, so that the upper and lower cylinders do not touch each other. The upper cylinder can rotate around the shaft, and the magnetic field sensor remains in the same position, changing the orientation of the probe.

[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: Cooperate with the telescopic device to change the distance between the fixed frame and the elastic body, so that the measuring position and angle of the probe are changed, and the various positions of the magnetic field of the magnet are 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, upper column, lower column, elastic body and connecting rope are provided. The suction cup device fixes the fixing frame on the table. When the connecting rope is pulled, the connecting rope pulls the front side of the elastic plate to bend downward, and the opposing surfaces of the upper column and the lower column do not contact each other. Pushing the supporting device can cause the upper column to rotate around the shaft, so that the magnetic field sensor remains in the same position and the orientation of the probe can be changed smoothly. This reduces 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 column, the various positions 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] Figure 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. protrusion; 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. support device; 81. mounting plate; 82. L-shaped plate No. 1; 83. connecting rod; 84. L-shaped plate No. 2; 85. ball; 86. return 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 easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] A sensor for measuring magnetic field comprises a probe housing 1, a probe head 11 being detachably connected to the front side of the probe housing 1, a magnetic sensor being installed at the front end of the probe head 11, a sleeve 12 being sleeved on the outside of the probe head 11, an upper cylinder 2 being fixedly connected to the bottom of the front side of the sleeve 12, a lower cylinder 21 being rotatably connected to the bottom of the upper cylinder, a shaft 22 being fixedly connected to the axis of the lower cylinder 21, the opposite surfaces of the upper cylinder 2 and the lower cylinder 21 being arranged in an irregular shape, the top of the shaft 22 extending into the upper cylinder 2, an elastic plate 3 being fixedly connected to the bottom of the shaft 22, a fixing bracket 31 being installed at the rear side of the elastic plate 3, and a fixing bracket 31 being arranged between the fixing bracket 31 and the elastic plate 3. A telescopic device 4 is provided, and 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 passes 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 provided 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. The front side of the probe housing 1 is detachably connected to a supporting device 8, and a wire 9 is fixedly connected to the axis center of the front side of the probe housing 1. The tail of the wire 9 passes 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 a wire 9. 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. The mode change button is used to switch to the magnetic induction intensity measurement mode or the magnetic induction direction measurement mode. A socket is provided at the bottom of the display device 91, and the socket can be connected to a computer through a data cable. The measured data can be graphed by software on the computer, which is conducive to a more intuitive expression of the measured values.

[0034] like Figure 1 and Figure 3 As shown, a probe 11 is detachably connected to the front side of the probe housing 1, and 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 interior of the sleeve 12 is a cavity, 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 measurement of the probe 11. 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, the bottom of the front side of the sleeve 12 is fixedly connected to the upper cylinder 2, the bottom of the upper cylinder 2 is provided with a lower cylinder 21, the axis of the lower cylinder 21 is provided with a shaft 22, and the axis of the lower cylinder 21 is fixedly connected to the shaft 22. The upper cylinder 2, the lower cylinder 21 and the shaft 22 have the same center of a circle, and the opposing surfaces of the upper cylinder 2 and the lower cylinder 21 are set to irregular shapes. For example, the opposing surfaces of the upper cylinder 2 and the lower cylinder 21 are provided with a plurality of protrusions, which are engaged 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 opposing surfaces of the upper cylinder 2 and the lower cylinder 21 are not engaged, the shaft 22 can rotate around the upper cylinder 2. On the contrary, if the upper cylinder 2 and the lower cylinder 21 are engaged, 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. 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, which is the same material and process as 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 to a ring 62. The connecting rope 61 is installed on the bottom surface of the fixing frame 31 through multiple fixing blocks 6. The connecting rope 61 passes through the multiple fixing blocks 6 and is pulled by the ring 62. The connecting rope 61 has a traction force on the front side of the elastic plate 3. The front side of the elastic plate 3 bends downward, so that the upper column 2 and the lower column 21 are not in engagement.

[0037] like Figure 3 As shown, multiple 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 cross-sectional length of the semi-elliptical ring 73 is greater than the vertical cross-sectional length of the thickest part of the probe housing 1, so that the semi-elliptical ring 73 can move back and forth and up and down at the thickest part of the probe housing 1. When the fixing frame 31 is moved 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 are under negative pressure, so that the multiple suction cup devices 5 adsorb the fixing frame 31 on the desktop or other contact surface;

[0038] like Figure 3-Figure 5 As shown and Figure 9 As shown, multiple top blocks 71 can 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 the valve block 51. A cross groove is provided at the axis of the valve block 51, which can 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. On the contrary, 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, destroying 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, symmetrical protrusions 32 are provided at the corners on the rear side 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 protrusions 32 slide in the corresponding sliding grooves 72 to limit the direction of movement of the flat plate 7 on the top surface of the fixing frame 31. Since the vertical cross-sectional length of the semi-elliptical ring 73 is greater than the vertical cross-sectional 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 protrusions 32 are disengaged. The slide groove 72 releases the restriction of the protrusion 32 and the slide groove 72 on the flat plate 7; at the same time, the ring 62 is made of rubber, and a groove 33 is provided on the side of the protrusion 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 end of the connecting rope 61 is wrapped around the outside of the symmetrical protrusion 32, and the ring 62 is sleeved on the groove 33, so that the upper column 2 and the lower column 21 remain separated, which is convenient for changing the orientation of the probe 11.

[0040] like Figure 7-Figure 8As shown, the support 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 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, the rear side of the probe housing 1 is detachably connected to a mounting plate 81, 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. When the No. 1 return spring 86 is compressed, 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 relaxed, the No. 1 L-shaped plate 82 is fixedly connected to the mounting plate 81, and the No. 2 L-shaped plate 84 is fixedly connected to the top of the display device 91 housing. 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 immovable. Initially, 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 can be expanded. Under the action of the No. 1 return 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 No. 2 L-shaped plate 84 is longer than the length of the vertical part of the No. 1 L-shaped plate 82, which increases the contact area between the No. 2 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 to adapt to the changes 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. There is a spacing between the No. 2 rods 42, so that the symmetrical No. 2 rods 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 outside 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 inward 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 be moved 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 via a wire 9. The zero adjustment button on the display device 91 is pressed to zero the magnetic field sensor. 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 tablet 7 squeezes the suction cup device 5 so that the fixing frame 31 is adsorbed on the table. The connecting rope 61 is pulled 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 contact with each other. The upper column 2 can rotate around the shaft 22, and the magnetic field sensor remains in the same position, changing the orientation of the probe 11.

[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: Cooperate with the telescopic device 4 to change the distance between the fixed frame 31 and the elastic body, 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.

[0048] It should be noted that the present invention is a sensor for measuring magnetic field and its use method, such as Figures 1-8As shown, when in use, the magnet to be measured is placed on the table, the fixing frame 31 is moved to the appropriate position and the front side of the probe 11 extends to a certain position on the surface of the magnet. Then, the semi-elliptical ring 73 is pressed downward. The semi-elliptical ring 73 squeezes the fixing frame 31 through the flat plate 7, causing the suction cup device 5 to adsorb to the table, thereby fixing the position of the fixing frame 31. Then, the connecting rope 61 is pulled through the circular ring 62. The connecting rope 61 exerts a traction force on the front side of the elastic plate 3, causing the front side of the elastic plate 3 to bend downward. The opposing surfaces of the upper column 2 and the lower column 21 do not contact each other. The upper column 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 smoothly 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 be used to change the distance between the fixing frame 31 and the elastic plate 3, so that various positions of the magnet's magnetic field can be measured, and the measuring position and angle of the probe 11 can be smoothly changed, which is beneficial to improving the acceptance efficiency of the magnet.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

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

2. A magnetic field measuring sensor according to claim 1, characterized in that: A valve block (51) is installed on the top surface of the suction cup device (5), and a plurality of top blocks (71) are fixedly connected to the bottom surface of the flat plate (7), 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), and 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. The magnetic field measuring sensor according to claim 1, wherein: The supporting device (8) includes a mounting plate (81), the mounting plate (81) is detachably connected to the rear side of the probe housing (1), the side of the mounting plate (81) is fixedly connected to a No. 1 L-shaped plate (82), the side of the No. 1 L-shaped plate (82) is slidably connected to a connecting rod (83), the bottom of the connecting rod (83) is fixedly connected to a No. 2 L-shaped plate (84), and the top of the connecting rod (83) is sleeved with a No. 1 return spring (86).

5. The 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. The magnetic field measuring sensor according to claim 1, characterized in that: The telescopic device (4) comprises a No. 1 plate (41), a rear side of the No. 1 plate (41) is fixedly connected to a symmetrical No. 2 rod (42), a front side of the fixing frame (31) is provided with a limiting groove (43), a plurality of No. 1 semicircular blocks (44) are fixedly connected to the left and right sides of the limiting groove (43), a plurality of No. 2 semicircular blocks (45) are fixedly connected to the outer side of the No. 2 rod (42), and the No. 1 semicircular blocks (44) and the No. 2 semicircular blocks (45) are embedded.

7. A method for using a magnetic field measuring sensor, wherein the method is used to implement the magnetic field measuring sensor according to any one of claims 1 to 6, and specifically comprises 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: In conjunction with the telescopic device (4), the distance between the fixed frame (31) and the elastic plate (3) is changed to change the measuring position and angle of the probe (11), and the various positions of the magnetic field of the magnet are 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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