TWI774606B - Magnetic angle detector - Google Patents

Abstract

A magnetic angle detector includes: a sleeve with magnets and an inspection component. The sleeve with magnets is coaxially mounted on an end of a shaft to be tested and emits identifying magnetic field lines. The inspection component is provided in a manner that the inspection component is separate from the sleeve with magnets. The inspection component senses the identifying magnetic field lines and correspondingly outputs a shaft rotation signal, calculates rotation angle information according to the shaft rotation signal, displays a rotation angle indication of the rotation of the shaft to be tested according to the rotation angle information, and resets the rotation angle information to zero by triggering a reset switch.

Description

Magnetic angle detector

The present invention relates to a detector, in particular to a magnetic angle detector.

The prime mover is the driving device in mechanical equipment. Further, the prime mover converts the energy of electrical energy or thermal energy into mechanical energy, and the mechanical energy is used to form power to perform a specific purpose operation, such as: an electric motor, a steam engine, an internal combustion engine... . Taking the stepper motor or servo motor in the electric motor as an example, the shaft of the motor is used as the power output end and is connected to the load of the application end, so the rotation angle (or speed) of the shaft body is the target that the field workers want to pay attention to. parameter.

During the rotation process of the shaft body, the measurement of the rotation angle of the shaft body is obviously an on-site engineering problem that workers in the related technical field are eager to perfect and solve. Moreover, after the measurement of the rotation angle of the shaft body is completed, "how to display the rotation angle of the shaft body so that the on-site staff can be informed" is also the core subject of the field work. In addition, when the shaft body is displaced in the axial direction, the measurement of the rotation angle of the shaft body cannot obtain accurate information by using the conventional device.

Therefore, the purpose of the present invention is to provide a magnetic angle detector, which can accurately measure the rotation angle information of the rotation of the shaft to be measured under the situation that the shaft body is displaced in the axial direction, and provide the field staff to know the information of the rotation angle of the shaft body to be measured. Rotation angle information.

The technical means adopted by the present invention to solve the problems of the prior art is to provide a magnetic angle detector, comprising: a shaft sleeve with a magnet, and the shaft sleeve with a magnet is coaxially installed on the end of the shaft body to be measured, so that the The shaft sleeve with magnets rotates and moves axially along with the shaft body to be measured, and the shaft sleeve with magnets emits identification magnetic lines of force toward the extending direction of the end; and the detection member is fastened to the shaft with magnets The shaft sleeve is separated and arranged in the extension direction of the end of the shaft body to be measured to avoid direct contact between the detection member and the shaft sleeve with the magnet, wherein the detection member has a magnetic sensor, a calculating A processing unit, a shaft state display unit and a reset switch, the magnetic sensor senses the intensity and direction of the identification magnetic field line emitted by the shaft sleeve with magnets at the current position and the shaft sleeve with magnets in the previous The change between the intensity and the direction of the identification magnetic line of force emitted by the position to obtain an axial displacement signal and a rotational displacement signal, the calculation processing unit is electrically connected to the magnetic sensor to receive the axial displacement signal of the shaft body and The rotational displacement signal is combined and calculated to obtain correct rotational angle information. Therefore, correct rotational angle information can still be obtained under the condition of axial displacement of the shaft to be measured. The shaft state display unit is electrically connected to the shaft state display unit. The calculation processing unit receives the rotation angle information, the shaft state display unit displays a rotation angle indication about the rotation of the shaft to be measured according to the rotation angle information, and the reset switch is electrically connected to the calculation processing unit, And the reset switch is set to reset the rotation angle information calculated by the shaft body rotation signal to zero after being triggered when the user needs it.

In an embodiment of the present invention, a magnetic angle detector is provided, wherein the detection component has a package housing, and the magnetic sensor and the calculation processing unit are installed inside the package housing.

In an embodiment of the present invention, a magnetic angle detector is provided, wherein the shaft state display unit is mounted on the outer surface of the package casing to display the rotation angle indication.

In an embodiment of the present invention, a magnetic angle detector is provided, wherein the shaft state display unit has a plurality of indicating elements.

In an embodiment of the present invention, a magnetic angle detector is provided, wherein one of the plurality of indicating elements is a system status indicator light.

In an embodiment of the present invention, a magnetic angle detector is provided, wherein the reset switch is disposed on the outer surface or inside of the package casing for triggering by pressing.

Through the technical means adopted by the magnetic angle detector of the present invention, the following technical effects can be obtained. In the case that the shaft body is displaced in the axial direction, the rotation angle information of the rotation of the shaft body to be measured can still be accurately measured, and the field staff can know the rotation angle information; The information can be reset to zero when the user wants it.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 6 . This description is not intended to limit the embodiments of the present invention, but is an example of the present invention.

As shown in FIGS. 1 to 3 , a magnetic angle detector 100 according to an embodiment of the present invention includes a shaft sleeve 1 with a magnet, and a detection member 2 . The magnetic angle detector 100 of the present invention can measure the rotation angle information of the rotation of the shaft body S to be measured, and provide the on-site staff to know the rotation angle information; in addition, the present invention enables the rotation calculated from the shaft body rotation signal. The angle information can be reset to zero when the user needs it. Furthermore, the present invention allows the shaft body S to be measured to move back and forth in the axial direction and still obtain correct rotational angle information, and prevents the shaft body S to be measured and the shaft sleeve 1 with magnets from colliding with the shaft. Detect the condition of member 2.

As shown in Figures 1 and 3, the shaft sleeve 1 with magnets is coaxially mounted on the end of the shaft body S to be measured, so that the shaft sleeve 1 with magnets accompanies the shaft body S to be measured Rotation and axial movement; and, the shaft sleeve 1 with magnets emits identification magnetic field lines M toward the extension direction of the end.

Further, according to the magnetic angle detector 100 according to an embodiment of the present invention, the shaft sleeve 1 with a magnet can be a sleeve member equipped with a strong magnet, wherein the strong magnet is directed toward the magnetic sensor 21 It is arranged on the end face of the sleeve member in a way (not shown in the drawings of the present invention).

As shown in FIG. 1 to FIG. 3 , the detection member 2 is provided in the extending direction of the end of the shaft body S to be measured in a manner of being separated from the shaft sleeve 1 with the magnet. Thereby, the present invention can avoid the direct contact between the detection member 2 and the shaft sleeve 1 with the magnet, thereby allowing the shaft body S to be measured to be displaced back and forth in the axial direction and still obtain a correct rotation angle information and prevent the bushing 1 with magnets from touching the detection member 2 .

Specifically, as shown in FIGS. 1 to 3 , the detection member 2 includes a magnetic sensor 21 , a calculation processing unit 22 , a shaft state display unit 23 , and a reset switch 24 . The magnetic sensor 21 is aligned with the shaft sleeve 1 with the magnet to sense the rotation and axial displacement changes of the identification magnetic field line M during the rotation of the shaft body S to be measured, and output the shaft body rotation signal correspondingly. The calculation processing unit 22 is electrically connected to the magnetic sensor 21 to receive the axial displacement signal and the rotational displacement signal of the shaft body and combine and calculate the correct rotational angle information accordingly. The shaft state display unit 23 is electrically connected to the calculation processing unit 22 to receive the rotation angle information. The shaft state display unit 23 displays a rotation angle indication about the rotation of the shaft S to be measured according to the rotation angle information. The reset switch 24 is electrically connected to the calculation processing unit 22, and the reset switch 24 is configured to reset the rotation angle information calculated by the shaft rotation signal to zero after being triggered.

Specifically, as shown in FIGS. 1 to 3 , according to the magnetic angle detector 100 according to an embodiment of the present invention, the detection member 2 has a package casing 20 . The magnetic sensor 21 and the calculation processing unit 22 are installed inside the package casing 20 . In a specific embodiment of the present invention, the encapsulation casing 20 may have a communication hole 20H formed through the encapsulation casing 20 and corresponding to the magnetic sensor 21 and the shaft sleeve with the magnet in position. 1; Thereby, the identification magnetic field line M emitted by the shaft sleeve 1 with the magnet can travel to the magnetic sensor 21 through the communication hole 20H.

As shown in FIG. 1 , FIG. 4 and FIG. 5 , in the magnetic angle detector 100 according to an embodiment of the present invention, the shaft state display unit 23 of the detection member 2 is installed outside the package casing 20 surface to display the rotation angle indication. Therefore, the field staff can know the rotation change of the shaft body S to be measured during the rotation process by visual inspection of the shaft body state display unit 23 (that is, the field staff can know the current state of the shaft body S to be measured S). angle of rotation).

Further, as shown in FIGS. 1 , 4 and 5 , in the magnetic angle detector 100 according to an embodiment of the present invention, the shaft state display unit 23 has a plurality of indicating elements 231 . For example, the indicating element 231 can be an LED bulb; the field staff can know the rotation angle indication of the current rotation of the shaft S to be measured by the number or combination of the indicating elements 231 emitting bright light.

As shown in FIG. 1 , FIG. 4 and FIG. 5 , in the magnetic angle detector 100 according to an embodiment of the present invention, the reset switch 24 is disposed on the outer surface or inside of the package casing 20 for Press to trigger. Specifically, the reset switch 24 is a push-button switch; however, the present invention is not limited to this, and the reset switch 24 can also be a rotary switch, which can be toggled by the on-site staff to achieve the rotation angle information reset to zero.

As described above, according to the magnetic angle detector 100 of the embodiment of the present invention, the magnetic angle detector 100 of the present invention can measure the shaft body S to be measured by the configuration of the shaft sleeve 1 with the magnet and the detection member 2 Rotation angle information for the rotation. In addition, the present invention provides the field workers to know the rotation angle information by visual inspection through the shaft state display unit 23 of the detection member 2 .

Further, as shown in FIG. 1 , FIG. 3 and FIG. 6 , when the shaft body S to be measured is displaced in the axial direction, the magnetic sensor 21 of the detection member 2 can sense the The change between the intensity of the identification magnetic field line M1 (or M2) emitted by the sleeve 1 with magnets at the current position and the intensity of the identification magnetic field lines M emitted by the sleeve 1 with magnets at the previous position, and The displacement of the shaft body S to be measured in the axial direction is known. For example, when the magnetic sensor 21 senses that the strength of the identification magnetic field M1 (FIG. 6) is greater than the strength of the identification magnetic field M (FIGS. 1 and 3), it can be known that the to-be-measured The displacement of the shaft body S in the axial direction is to move toward the detection member 2; and, when the magnetic sensor 21 senses that the strength of the identification magnetic field line M2 (FIG. 6) is less than the strength of the identification magnetic field line M (No. 1 and 3), it can be known that the displacement of the shaft body S to be measured in the axial direction is moving away from the detection member 2 . Further, please refer to FIG. 2 and FIG. 6 at the same time, the axial displacement signal obtained by the magnetic sensor 21 sensing the change between the intensity of the identification magnetic force line M and the intensity of the identification magnetic force lines M1 and M2 , and the axial displacement information can be obtained through the calculation of the calculation processing unit 22 . In other words, the present invention can still accurately measure the rotation of the shaft to be measured S by combining the detection and calculation of the shaft rotation signal and the axial displacement signal when the shaft to be measured S is displaced in the axial direction Rotation angle information.

The above descriptions and descriptions are only descriptions of preferred embodiments of the present invention. Those with ordinary knowledge in the art can make other modifications according to the scope of the patent application defined below and the above descriptions, but these modifications should still be It is within the scope of the right of the present invention for the inventive spirit of the present invention.

100: Magnetic angle detector 1: Bushing with magnet 2: Detection components 20: Encapsulation shell 20H: Connecting hole 21: Magnetic sensor 22: Computing Processing Unit 23: Axis status display unit 231: Indicating element 231A: System Status Indicator 24: Reset switch M: Identify magnetic field lines M1: Identify magnetic field lines M2: Identify Magnetic Field Lines S: shaft to be measured

[Fig. 1] is a schematic diagram showing the arrangement between the magnetic angle detector and the shaft to be measured according to an embodiment of the present invention; [Fig. 2] is a block diagram showing a detection member of a magnetic angle detector according to an embodiment of the present invention; [FIG. 3] is a partial cross-sectional schematic diagram showing a magnetic angle detector according to an embodiment of the present invention; [FIG. 4] is a schematic diagram showing that the magnetic angle detector according to an embodiment of the present invention displays a rotation angle indication about the rotation of the shaft to be measured; [FIG. 5] is a schematic diagram showing that the magnetic angle detector according to an embodiment of the present invention resets the rotation angle information to zero after being triggered; and, [FIG. 6] is a schematic diagram showing that the magnetic angle detector according to the embodiment of the present invention senses the axial displacement of the shaft to be measured.

100: Magnetic angle detector

1: Bushing with magnet

2: Detection components

20: Encapsulation shell

23: Axis status display unit

231: Indicating element

231A: System Status Indicator

24: Reset switch

M: Identify magnetic field lines

S: shaft to be measured

Claims (1)

A magnetic angle detector, comprising: A shaft sleeve with a magnet, the shaft sleeve with a magnet is coaxially installed on the end of the shaft body to be measured, so that the shaft sleeve with a magnet rotates and moves axially with the shaft body to be measured, and the shaft sleeve with a magnet The sleeve emits identifying magnetic lines of force in the direction of extension of the end; and, a detection member, which is arranged in the extending direction of the end of the shaft body to be measured in a manner of being separated from the shaft sleeve with a magnet to avoid direct contact between the detection member and the shaft sleeve with a magnet, The detection component has a magnetic sensor, a calculation processing unit, a shaft state display unit and a reset switch. The magnetic sensor detects the intensity of the magnetic field line and The axial displacement signal and the rotational displacement signal are obtained by the change between the direction and the intensity and direction of the identification magnetic field line issued by the shaft sleeve with the magnet at the previous position, and the calculation processing unit is electrically connected to the magnetic sensor to Receive the axial displacement signal and the rotational displacement signal of the shaft body and combine them to calculate the correct rotational angle information. Therefore, the correct rotational angle information can still be obtained under the condition of the axial displacement of the shaft to be measured. , the shaft state display unit is electrically connected to the calculation processing unit to receive the rotation angle information, the shaft state display unit displays the rotation angle indication about the rotation of the shaft to be measured according to the rotation angle information, and the The reset switch is electrically connected to the calculation processing unit, and the reset switch is set to reset the rotation angle information calculated by the shaft body rotation signal to zero after being triggered when the user needs it.

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