A sensor device for measuring linear displacement using magnetic sensitive technology

Abstract

The present invention discloses a sensor device for measuring linear displacement using magnetic sensitive technology, including a magnetic steel, a hardware circuit, a base, a rotating arm and a spring, wherein the top of the base is a rotating seat, a rotating shaft is rotatably mounted on the rotating seat, the lower end of the rotating arm is fixedly mounted on the rotating shaft, and a spring is connected between the middle or upper middle position of the rotating arm and the base; a side cover is installed on the side of the rotating seat corresponding to the end of the rotating shaft, a magnetic steel is fixed on the end of the rotating shaft, and a hardware circuit corresponding to the magnetic steel is fixed on the inner side of the side cover. The rotating arm of the present invention is connected and fixed to the rotating shaft, and the linear displacement of the external downward pressure is received by the roller of the rotating arm, and the linear displacement of the downward pressure of the rotating arm can be converted into the rotational motion of the rotating shaft, and then the angular displacement of the rotating shaft is measured by the magnetic sensitive technology of the magnetic steel and the hardware circuit, thereby realizing the measurement of the linear displacement of the external downward pressure received by the roller of the rotating arm, reducing the cost and improving the detection accuracy and reliability.

Description

Technical Field

[0001] The invention relates to a sensor, and in particular to a sensor device for measuring linear displacement using magnetic sensitive technology. Background Art

[0002] Magnetic sensors, also known as non-contact sensors, are an angular displacement sensor. Their main function is to convert the angular displacement of an object into a linearly changing angular signal for feedback. At present, magnetic sensors are all angular displacement measurements. Linear displacement sensors are mainly traditional contact sensors, which have a short life and low precision. The second is LVDT, which needs to be used with a decoding circuit and has a high cost. Sensors are relatively important electronic detection devices. At present, there is an urgent need to develop a sensor device that can measure the linear displacement of the device under test through magnetic sensitive technology. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sensor device for measuring linear displacement using magnetic sensitive technology. The linear displacement of the downward pressure of the rotating arm is received by the roller of the rotating arm, and the linear displacement of the downward pressure of the rotating arm can be converted into the rotational motion of the rotating shaft. Then, the angular displacement of the rotating shaft is measured by the magnetic sensitive technology of the magnetic steel and the hardware circuit, thereby realizing the measurement of the linear displacement of the downward pressure received by the roller of the rotating arm, reducing the cost and improving the detection accuracy and reliability.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A sensor device for measuring linear displacement using magnetic sensitive technology, comprising a magnet, a hardware circuit, a base, a rotating arm and a spring, wherein the top of the base is a rotating seat, a rotating shaft is rotatably mounted on the rotating seat, the lower end of the rotating arm is fixedly mounted on the rotating shaft, and a spring is connected between the middle or upper middle part of the rotating arm and the base; a side cover is installed on the side of the rotating seat corresponding to the end of the rotating shaft, a magnet is fixed to the end of the rotating shaft, and a hardware circuit corresponding to the magnet is fixed to the inner side of the side cover.

[0006] In order to better implement the present invention, the present invention also includes a signal output line, which is electrically connected to the hardware circuit. The side wall of the rotating seat is provided with a signal output line hole, and the side wall of the rotating seat is provided with a line card corresponding to the signal output line hole.

[0007] Preferably, the rotating seat is composed of two mutually parallel side plates, and the rotating shaft is rotatably mounted between the two side plates of the rotating seat. A rotating space is provided between the two side plates of the rotating seat for the lower end of the rotating arm to rotate.

[0008] Preferably, the upper end of the rotating arm is rotatably connected to a roller via a pin C.

[0009] Preferably, the two side plates of the rotating seat are respectively provided with axial holes, and a sliding bearing A is installed in one axial hole of the rotating seat, and the axial hole of the rotating seat is connected to the inner cavity of the side cover; a sliding bearing B is installed in the other axial hole of the rotating seat, one end of the rotating shaft is installed in the sliding bearing A, and the other end of the rotating shaft is installed in the sliding bearing B.

[0010] Preferably, the lower end of the rotating arm is fixed to the rotating shaft by a pin connection, a protruding arm is protruded in the middle or upper middle part of the rotating arm, the bottom of the base is a bottom plate, and the spring is connected between the protruding arm and the bottom plate.

[0011] Preferably, the convex arm end of the rotating arm is hinged with a spring mounting seat B through a pin shaft B, the bottom plate of the base is hinged with a spring mounting seat A through a pin shaft A, and the spring is connected between the spring mounting seat A and the spring mounting seat B.

[0012] Preferably, the side cover is connected and fixed to the rotating seat by screws, and a plurality of screw holes are formed on the bottom plate of the base.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] (1) The rotating arm of the present invention is fixedly connected to the rotating shaft, and the linear displacement of the external downward pressure is received by the roller of the rotating arm, which can be converted into the rotational motion of the rotating shaft, and then the angular displacement of the rotating shaft is measured by the magnetic sensitive technology of the magnetic steel and the hardware circuit, thereby realizing the measurement of the linear displacement of the external downward pressure received by the roller of the rotating arm, thereby reducing the cost and improving the detection accuracy and reliability.

[0015] (2) The present invention realizes the measurement of linear displacement through magnetic sensitive technology and adopts a magnetic encoder to measure linear displacement, which not only has a long service life and high precision but also has very low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure when looking down after removing the spring and rotating arm.

[0018] The names corresponding to the reference numerals in the accompanying drawings are:

[0019] 1-rotating axis, 2-hardware circuit, 3-rotating arm, 4-base, 41-rotating seat, 5-spring mounting seat A, 6-side cover, 7-pin A, 8-roller, 9-spring, 10-wire clip, 11-pin, 12-sliding bearing A, 13-magnet, 14-pin B, 15-pin C, 16-spring mounting seat B, 17-sliding bearing B. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with embodiments:

[0021] Example

[0022] like Figure 1 , Figure 2 As shown, a sensor device for measuring linear displacement using magnetic sensitive technology includes a magnetic steel 13, a hardware circuit 2, a base 4, a rotating arm 3, a spring 9 and a signal output line. The top of the base 4 is a rotating seat 41, on which a rotating shaft 1 is rotatably mounted, and the lower end of the rotating arm 3 is fixedly mounted on the rotating shaft 1. A spring 9 is connected between the middle or upper middle position of the rotating arm 3 and the base 4. A side cover 6 is installed on the side of the rotating seat 41 corresponding to the end of the rotating shaft 1, and a magnetic steel 13 is fixed on the end of the rotating shaft 1. A hardware circuit 2 corresponding to the magnetic steel 13 is fixed on the inner side of the side cover 6. The signal output line is electrically connected to the hardware circuit 2, and a signal output line hole is opened on the side wall of the rotating seat 41. The side wall of the rotating seat 41 is provided with a line card 10 corresponding to the signal output line hole. The hardware circuit 2 senses the magnetic field change generated by the rotation of the magnetic steel 13, and after being processed internally by the hardware circuit 2, a signal that is linearly related to the angle is output through the signal output line, so that the linear displacement signal is fed back to the host computer.

[0023] like Figure 2 As shown, the rotating seat 41 is composed of two parallel side plates, and the rotating shaft 1 is rotatably installed between the two side plates of the rotating seat 41. There is a rotating space between the two side plates of the rotating seat 41 for the lower end of the rotating arm 3 to rotate. The lower end of the rotating arm 3 rotates in the rotating space, and the rotation of the rotating arm 3 is constrained by the elastic force of the spring 9. The two side plates of the rotating seat 41 are respectively provided with axial holes, and a sliding bearing A12 is installed in one axial hole of the rotating seat 41, and the axial hole of the rotating seat 41 is connected to the inner cavity of the side cover 6. A sliding bearing B17 is installed in the other axial hole of the rotating seat 41, and one end of the rotating shaft 1 is installed in the sliding bearing A12, and the other end of the rotating shaft 1 is installed in the sliding bearing B17.

[0024] like Figure 1 As shown, the upper end of the rotating arm 3 is rotatably connected to the roller 8 through the pin C15. The lower end of the rotating arm 3 is connected and fixed to the rotating shaft 1 through the pin 11. The middle or upper middle part of the rotating arm 3 is provided with a protruding arm, the bottom of the base 4 is a bottom plate, and the spring 9 is connected between the protruding arm and the bottom plate.

[0025] like Figure 1 As shown, the convex arm end of the rotating arm 3 of the present invention is hinged with a spring mounting seat B16 through a pin shaft B14, the bottom plate of the base 4 is hinged with a spring mounting seat A5 through a pin shaft A7, and the spring 9 is connected between the spring mounting seat A5 and the spring mounting seat B16.

[0026] The side cover 6 of the present invention is connected and fixed to the rotating seat 41 by screws, and a plurality of screw holes are opened on the bottom plate of the base 4.

[0027] When in use, the present invention is used for linear displacement detection of a shaft that can be raised and lowered. The shaft of the device to be tested contacts the roller 8 of the present invention up and down. When the shaft of the device to be tested moves downward in a linear motion, the shaft of the device to be tested pushes the roller 8 to move downward, and the roller 8 drives the rotating arm 3 together with the rotating shaft 1 to rotate in the rotating seat 41, and the convex arm of the rotating arm 3 moves downward and causes the spring 9 to be compressed. The rotating shaft 1 rotates forward and drives the magnetic steel 13 to rotate forward. The magnetic steel 13 rotates and generates a magnetic field change. The circuit sensing unit of the hardware circuit 2 senses, receives and processes the signal, and then outputs a signal that is linearly related to the angle to the host computer through the signal output line. When the shaft of the device to be tested moves upward in a linear motion, under the elastic force of the spring 9, the roller 8 follows the shaft of the device to be tested to move upward, and the roller 8 drives the rotating arm 3 together with the rotating shaft 1 to rotate in the rotating seat 41, and the convex arm of the rotating arm 3 moves upward and causes the spring 9 to recover its deformation. The rotating shaft 1 rotates in the opposite direction and drives the magnetic steel 13 to rotate in the opposite direction. The magnetic steel 13 rotates and generates a change in the magnetic field. The circuit sensing unit of the hardware circuit 2 receives and processes the signal and outputs a signal that is linearly related to the angle to the host computer through the signal output line. In this way, the present invention can accurately measure the linear displacement of the shaft of the device to be tested when it rises or falls. Of course, the present invention can also be applied to the linear displacement detection of other devices or components.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sensor device for measuring linear displacement using magnetic sensing technology, comprising a magnetic steel (13) and a hardware circuit (2), characterized in that: The invention also comprises a base (4), a rotating arm (3) and a spring (9), wherein the top of the base (4) is a rotating seat (41), a rotating shaft (1) is rotatably mounted on the rotating seat (41), the lower end of the rotating arm (3) is fixedly mounted on the rotating shaft (1), and a spring (9) is connected between the middle or upper middle part of the rotating arm (3) and the base (4); a side cover (6) is mounted on the side of the rotating seat (41) corresponding to the end of the rotating shaft (1), a magnetic steel (13) is fixed on the end of the rotating shaft (1), and the rotating arm (3) is connected to the rotating shaft (1). A hardware circuit (2) corresponding to the magnetic steel (13) is fixed on the inner side of the side cover (6), and the side cover (6) is connected and fixed to the rotating seat (41) by screws; the upper end of the rotating arm (3) is rotatably connected to a roller (8) through a pin C (15), and the linear displacement of the downward pressure of the external environment is received by the roller of the rotating arm and converted into a rotating motion of the rotating shaft, and the angular displacement of the rotating shaft is measured by the magnetic sensitivity technology of the magnetic steel and the hardware circuit, and the linear displacement of the axis of the device to be tested when it rises or falls is measured.

2. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 1, characterized in that: It also includes a signal output line, the signal output line is electrically connected to the hardware circuit (2), a signal output line hole is opened on the side wall of the rotating seat (41), and a line card (10) corresponding to the signal output line hole is provided on the side wall of the rotating seat (41).

3. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 1, characterized in that: The rotating seat (41) is composed of two mutually parallel side plates, and the rotating shaft (1) is rotatably mounted between the two side plates of the rotating seat (41).

4. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 3, characterized in that: The two side plates of the rotating seat (41) are respectively provided with axial holes, a sliding bearing A (12) is fitted in one of the axial holes of the rotating seat (41), and the axial hole of the rotating seat (41) is in communication with the inner cavity of the side cover (6); a sliding bearing B (17) is fitted in the other axial hole of the rotating seat (41), one end of the rotating shaft (1) is fitted in the sliding bearing A (12), and the other end of the rotating shaft (1) is fitted in the sliding bearing B (17).

5. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 1, characterized in that: The lower end of the rotating arm (3) is connected and fixed to the rotating shaft (1) via a pin (11); a protruding arm is provided in the middle or upper middle portion of the rotating arm (3); the bottom of the base (4) is a bottom plate; and the spring (9) is connected between the protruding arm and the bottom plate.

6. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 5, characterized in that: The protruding arm end of the rotating arm (3) is hingedly connected to a spring mounting seat B (16) via a pin shaft B (14), the bottom plate of the base (4) is hingedly connected to a spring mounting seat A (5) via a pin shaft A (7), and the spring (9) is connected between the spring mounting seat A (5) and the spring mounting seat B (16).

7. A sensor device for measuring linear displacement using magnetic sensing technology according to claim 5, characterized in that: A plurality of screw holes are provided on the bottom plate of the base (4).

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