CN114577109A - Magnetic measuring device and method for rotating shaft angle of shaft side detection - Google Patents
Magnetic measuring device and method for rotating shaft angle of shaft side detection Download PDFInfo
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- CN114577109A CN114577109A CN202210097402.2A CN202210097402A CN114577109A CN 114577109 A CN114577109 A CN 114577109A CN 202210097402 A CN202210097402 A CN 202210097402A CN 114577109 A CN114577109 A CN 114577109A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 69
- 238000012545 processing Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000005355 Hall effect Effects 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 1
- 230000005389 magnetism Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000008859 change Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
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- 229920001651 Cyanoacrylate Polymers 0.000 description 2
- 239000004830 Super Glue Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
Abstract
The invention discloses a magnetic measuring device and a magnetic measuring method for detecting the angle of a rotating shaft from the shaft side, which are used for high-precision measurement of angles when various shaft bodies rotate at high speed. The magnetic measuring device includes: a magnetic field generating element, a magnetic induction unit and an external microprocessor. The magnetic field generating element is fixed on the rotation shaft to be measured, and rotates coaxially and synchronously with the shaft body. The magnetic induction unit is arranged on the side surface of the magnetic field generating element in a non-contact mode and used for detecting the change of the magnetic field intensity and the direction of the magnetic field generating element and calculating the data of the rotation angle of the detected rotating shaft. And the external microprocessor is connected with the magnetic induction unit and used for reading the angle value generated by the magnetic induction unit, automatically correcting the detection result according to the correction parameter and finally outputting the processed angle data to the outside through a serial port. The invention can measure the rotation angle of the measured object with a rotating shaft in real time; the problem of current angle measurement equipment easily receive spatial position influence, with high costs, installation difficulty etc is solved.
Description
Technical Field
The present invention relates to a magnetic angle measuring device, and more particularly, to a magnetic angle measuring device and method capable of measuring a rotation angle from a side surface of a rotating shaft.
Background
In practical engineering application systems requiring precise angle measurement, it is very important to determine the implementation method thereof.
The angle measuring devices commonly used at present include photoelectric devices, mechanical devices, and magnetoelectric devices. Although the photoelectric equipment is widely applied, the photoelectric equipment has high cost, short service life and poor adaptability to severe working environments. Most of mechanical equipment is contact measurement, so that the requirements on installation conditions and precision are strict, and the measured data are inconvenient to process and transmit. The magnetoelectric sensor has high precision, high resolution, low cost and small occupied space, thereby having great advantages in the scenes of measuring the rotation angles of some rotating shafts.
In the existing method for measuring the angle of the rotating shaft magnetically, a mounting mode that a magnetic field generating element is fixed on the transverse end face of the rotating shaft is mostly adopted, so that the center of a circle of a disc-shaped permanent magnet is opposite to the axis of the rotating shaft, and the disc-shaped permanent magnet rotates coaxially and synchronously. The sensor in this measurement mode, even including the data acquisition and analysis module (including the circuit board), is aligned with the center of the magnetic field generating element, is fixedly mounted on the housing or the bracket facing the outside of the shaft section, and needs to maintain a fixed gap without contact with the magnetic field generating element. This requires a sufficient space and a stable fulcrum outside the end face of the shaft.
However, in many application scenarios, there are many space-limiting factors at both ends of the rotation axis: on one hand, the disc-shaped permanent magnet cannot be fixedly arranged at the position of the circle center of the disc-shaped permanent magnet, which is opposite to the axle center of the rotating shaft, so that the disc-shaped permanent magnet cannot rotate coaxially and synchronously with the rotating shaft; on the other hand, the data acquisition and analysis module and its circuit board do not have enough space and fixing points, so that it cannot be installed at the corresponding position facing the magnetic field generating element.
Disclosure of Invention
In view of the above-mentioned technical deficiencies, it is an object of the present invention to provide a magnetic measuring device and method for measuring an angle of a rotating shaft from a side surface of the rotating shaft. The method for fixedly mounting the magnetic field generating element and the magnetic induction unit can be used for solving the problem of larger detection error of the magnetic induction unit caused by improper mounting of the magnetic field generating element.
The invention is realized by adopting the following technical scheme:
the invention relates to a magnetic measuring device for the angle of a rotating shaft detected by the shaft side, which comprises a magnetic field generating element, a magnetic induction unit and an external microprocessor.
The magnetic field generating element is fixed on the measured rotating shaft through the auxiliary clamp, so that the magnetic field generating element is more stably installed and can rotate coaxially and synchronously with the measured rotating shaft.
The magnetic induction unit and the external microprocessor are arranged outside the magnetic field generating element. When the measured rotating shaft and the magnetic field generating element rotate synchronously, the direction of the magnetic field and the intensity of the magnetic field also change along with the rotation. The magnetic induction unit detects the magnetic field in a non-contact mode and outputs a digital signal representing the rotation angle to an external microprocessor for further processing.
Furthermore, the magnetic field generating element adopts an annular permanent magnet, and the magnetizing mode is radial magnetizing.
Furthermore, the magnetic induction unit core element is a sensor chip integrated with a hall element and is packaged in a square shape.
Furthermore, the auxiliary clamp comprises a lower annular column platform and an upper annular column cover plate.
The angle measuring method of the magnetic measuring device for the angle of the rotating shaft by the shaft side detection is characterized in that the magnetic induction unit is arranged on the side surface of the magnetic field generating element. The central plane of the magnetic induction unit and the annular central plane of the annular permanent magnet are coincident as much as possible. The front side edge of the sensor chip square package is as perpendicular as possible to a connecting line between the center of the sensor chip and the center of the annular permanent magnet. The gap between the sensor chip and the magnetic field generating element is 0.1-1 mm, and the sensor chip is as close to the edge of the magnetic field generating element as possible.
The external microprocessor sends a well-agreed data reading instruction to the magnetic induction unit by writing an SPI communication program, obtains binary data representing angles in a register of the magnetic induction unit, and analyzes and processes the data for transmission.
The invention has the beneficial effects that: the invention can measure the rotation angle of the measured object with a rotating shaft in real time; the angle measuring device based on the magnetic principle solves the problems that the existing angle measuring device based on the magnetic principle is easily influenced by the spatial position, cannot be installed and detected by adopting the cross-sectional end face of a rotating shaft, and other detection methods are high in cost and difficult to install while the measurement accuracy is ensured.
Drawings
FIG. 1 is a schematic view of a magnetic measuring device for measuring the angle of a rotating shaft by shaft side detection according to the present invention;
FIG. 2 is a schematic diagram of the relative positions of the magnetic field generating element and the magnetic induction unit according to the present invention;
FIG. 3 is a cross-sectional view of a magnetic measuring device for measuring the angle of a rotating shaft according to the present invention;
fig. 4 is a schematic diagram of an SPI return angle data format in the embodiment of the present invention.
In the figure: 11. a measured rotating shaft; 12. a magnetic field generating element; 14. MA702 contactless angle sensor chip; 15. a magnetic induction unit circuit board; 21. connecting geometric centers; 31. the axis of the rotating shaft to be measured; 32. spacing; 131. an upper annular column cover plate; 132. a lower annular column platform; 161. a circuit board cover plate; 162. a circuit board base.
Detailed Description
The invention relates to a magnetic measuring device for the angle of a rotating shaft detected by the shaft side, which comprises a magnetic field generating element, a magnetic induction unit and an external microprocessor. The magnetic field generating element is fixedly arranged on the rotating shaft to be measured and rotates coaxially and synchronously with the rotating shaft; the magnetic induction unit and the external microprocessor are arranged outside the magnetic field generating element. When the measured rotating shaft and the magnetic field generating element rotate synchronously, the direction of the magnetic field and the intensity of the magnetic field also change along with the rotation. The magnetic induction unit detects the magnetic field in a non-contact mode and outputs a digital signal representing the rotation angle to an external microprocessor for further processing.
The magnetic field generating element adopts an annular permanent magnet, and the magnetizing mode is radial magnetizing. The ring-shaped permanent magnet is fixedly arranged on the measured rotating shaft, and the ring-shaped plane of the ring-shaped permanent magnet is vertical to the axis of the measured rotating shaft. When the measured rotating shaft rotates at a high speed, the annular permanent magnet and the measured rotating shaft rotate coaxially and synchronously.
The annular permanent magnet is fixed on the measured rotating shaft through the auxiliary clamp, so that the magnetic field generating element is more stably installed and can coaxially and synchronously rotate with the measured rotating shaft. The inner diameter of the annular permanent magnet is slightly larger than the diameter of the measured rotating shaft.
The auxiliary clamp comprises a lower annular cylinder platform and an upper annular cylinder cover plate. The inner diameter of the lower annular cylinder platform is equal to the diameter of the measured rotating shaft so as to be directly in close contact with and fixed on the measured rotating shaft. The outer diameter of the lower annular cylinder platform is divided into two parts, and the upper outer diameter of the first part is equal to the inner diameter of the annular permanent magnet so as to be directly in close contact with and fixed on the inner diameter of the annular permanent magnet; the lower outer diameter of the second part is slightly smaller than the outer diameter of the annular permanent magnet, and the annular permanent magnet is arranged above the second part so as to be used as a bottom support of the annular permanent magnet and keep the annular plane vertical to the axis of the rotating shaft to be measured. The inner diameter of the upper-layer annular cylinder cover plate is equal to the outer diameter of the first part of the lower-layer annular cylinder platform so as to be sleeved in the lower-layer annular cylinder platform, and the magnetic field generating element is fixed by two layers of auxiliary clamps. Optionally, the magnetic field generating element and the auxiliary fixture are further fixed to the rotation axis to be measured with super glue, thereby improving the rotation angle detection accuracy.
The magnetic induction unit core is a magnetoelectric induction type sensor based on Hall effect, and is a small sensor chip integrated with Hall elements and packaged in a square mode.
In the method for detecting the shaft side of the magnetic measuring device for measuring the angle of the rotating shaft by using the shaft side detection, the magnetic induction unit is installed on the side surface of the magnetic field generating element. The central plane of the magnetic induction unit and the annular central plane of the annular permanent magnet are coincident as much as possible. The front side edge of the square package of the magnetoelectric induction type sensor is perpendicular to a connecting line of the center of the magnetoelectric induction type sensor and the axis of the measured rotating shaft as much as possible. The gap between the magnetoelectric induction type sensor and the magnetic field generating element is 0.1-1 mm and is as close to the edge of the magnetic field generating element as possible.
Optionally, when the magnetic induction unit and the annular central plane of the annular permanent magnet are located at the same height, the parameter compensation for the magnetoelectric induction type sensor can be reduced, so that the measurement result is more accurate.
Optionally, when the front side of the magnetic induction unit is completely perpendicular to the connecting line of the center of the magnetoelectric induction type sensor and the axis of the measured rotating shaft, the parameter compensation of the magnetoelectric induction type sensor can be reduced, so that the measurement result is more accurate.
Optionally, when the gap between the magnetoelectric induction type sensor and the magnetic field generating element is within a range of 0.2-0.5 mm, parameter compensation for the magnetoelectric induction type sensor can be reduced, so that a measurement result is more accurate.
Optionally, when the thickness of the magnetic field generating element, that is, the annular permanent magnet, is increased to a certain extent, the magnetic field intensity at the position where the magnetic induction unit is located is stronger, and the magnetic induction lines are denser and more uniform, so that the measurement result is more accurate.
The magnetic induction unit core element of the present invention can be selected from, but not limited to, an MA702 contactless angle sensor. The contactless angle sensor can convert the magnetic field intensity and the magnetic field direction which are generated by the magnetic field generating element and represent the rotation angle of the measured rotating shaft into electric signals in a digital format. The MA702 contactless angle sensor may transmit binary data representing an angle in its register via an SPI serial peripheral interface protocol.
Optionally, a magnetic induction unit with a higher sampling frequency can be selected to obtain more angle data samples in the same time, so that the measurement result is more accurate.
The external microprocessor can be selected from but not limited to GD32F103, STM32F103 and other single-chip microcomputers with SPI communication functions. The external microprocessor sends a well-agreed data reading instruction to the magnetic induction unit by writing an SPI communication program, obtains binary data representing angles in a register of the magnetic induction unit, and analyzes and processes the data for transmission.
Alternatively, an external microprocessor with a faster processing speed may be used to read and process the angle data more times in the same time, so that the measurement results are more accurate.
The MA702 contactless angle sensor of the present invention is a 12-bit resolution absolute angle sensor. The external microprocessor needs 16 clock pulses to completely read the primary angle value through the SPI protocol, the length of the data output by the non-contact angle sensor is less than 16 bits, and the other bits are zero.
Alternatively, in the case of a 12-bit data output length, only 12 clock counts are needed to obtain the full sensor resolution of the contactless angle sensor, thereby increasing the reading speed.
Alternatively, in case the resolution requirement is lower, the output data of the contactless angle sensor can be read by sending fewer clock counts, thereby enabling a fast reading of the data.
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, in the present embodiment, the object to be measured is a measured rotating shaft 11 in a certain high-voltage switch operating mechanism. The magnetic measuring device for the angle of the rotating shaft by using the shaft side detection of the invention is used for measuring the angle and comprises a magnetic field generating element 12, an auxiliary clamp, a magnetic induction unit and an external microprocessor. The auxiliary fixture comprises an upper annular column cover plate 131 and a lower annular column platform 132. The magnetic induction unit comprises an MA702 contactless angle sensor chip 14, a magnetic induction unit circuit board 15, a circuit board base 162 and a circuit board cover plate 161.
Wherein, the magnetic field generating element 12 is an annular permanent magnet which is magnetized in a radial direction, and is fixed on the measured rotating shaft 11 through an upper annular cylinder cover plate 131 and a lower annular cylinder platform 132 of the auxiliary fixture; the magnetic induction unit adopts an MA702 contactless angle sensor chip 14, and a magnetic induction unit circuit board 15 is fixed on a mechanism bottom board through a circuit board base 162 and a circuit board cover plate 161, so that a certain distance is kept between the magnetic induction unit 14 and the magnetic field generating element 12.
During operation, the magnetic field generating element 12 rotates synchronously and coaxially with the measured rotating shaft 11. The magnetic induction unit can sense the magnetic field in real time, and once the measured rotating shaft 11 drives the angular position of the magnetic field generating element 12 to change, the magnetic induction unit can calculate and generate the absolute angle values of different positions of the magnetic field generating element 12 according to the change of the magnetic field on the surface of the magnetic induction unit.
Fig. 2 shows a schematic diagram of the relationship between the magnetic field generating element and the MA702 contactless angle sensor chip. During installation, the circle center of the magnetic field generating element 12 is perpendicular to the geometric center connecting line 21 of the MA702 contactless angle sensor chip, and the height of the magnetic field generating element 12 is consistent with the height of the horizontal center line of the MA702 contactless angle sensor chip, so that the parameter compensation of the MA702 contactless angle sensor chip can be reduced, and the measuring result is more accurate.
In this embodiment, the magnetic field generating element 12 is fixed to the measured rotating shaft 11 and rotates synchronously and coaxially with the measured rotating shaft 11. Since the relative position of the magnetic field generating element 12 with respect to the rotation axis 11 to be measured and the magnetic induction means is highly required, the magnetic field generating element 12 and the fixing method of the magnetic induction means will be described in detail below. As shown in fig. 3, in order to keep the horizontal central annular plane of the magnetic field generating element 12 perpendicular to the axis 31 of the rotation shaft to be measured, an auxiliary fixture is used to fix the magnetic field generating element 12. The auxiliary clamp includes a lower annular column platform 132 and an upper annular column cover plate 131, both of which are annular. The inner diameter of the lower annular column platform 132 is equal to the diameter of the measured rotating shaft 11, so as to be directly fixed in contact with the measured rotating shaft 11. The outer diameter of the lower annular pillar platform 132 is divided into an upper part and a lower part, the upper outer diameter of the first part is equal to the inner diameter of the magnetic field generating element 12, so as to be directly contacted and fixed with the inner side of the magnetic field generating element 12; the lower outer diameter of the second part is slightly smaller than the outer diameter of the magnetic field generating element 12 to serve as a bottom support of the magnetic field generating element 12, so that the magnetic field generating element 12 keeps the annular plane vertical to the axis 31 of the measured rotating shaft. The inner diameter of the upper annular pillar cover 131 is equal to the outer diameter of the first portion of the lower annular pillar platform 132 to fit into the lower annular pillar platform 132, so that the two layers of auxiliary fixtures fix the magnetic field generating element 12. Preferably, a small amount of super glue is applied to the contact surface to further fix the magnetic field generating element 12, the lower annular cylinder platform 132, the upper annular cylinder cover plate 131 and the rotation axis 11 to be measured, thereby improving the rotation angle detection accuracy.
In the present invention, the edge distance 32 between the front side of the MA702 contactless angle sensor chip 14 and the outer diameter of the magnetic field generating element 12 is required to be as small as possible within a range of 0.1mm to 1 mm. In this example, the spacing 32 is 0.2 mm. The magnetic induction intensity of the magnetic field generated by the annular permanent magnet at the position of the magnetic induction unit 14 is 30-100 mT. In the mounting process, after the magnetic field generating element 12 is fixed, the magnetic induction unit circuit board 15 is placed on the circuit board base 162. The circuit board base 162 has a groove having the same width as the magnetic induction unit circuit board 15 to adjust the front and rear positions thereof, thereby adjusting the distance 32. After the position of the magnetic induction unit circuit board 15 on the circuit board base 162 is determined, the circuit board cover plate 161 is pressed on the top of the magnetic induction unit circuit board 15, and the magnetic induction unit circuit board 15, the circuit board base 162 and the circuit board cover plate 161 are fixed on the metal bottom plate of the high-voltage switch operating mechanism together by screws.
In this embodiment, the time of one opening/closing operation of the high voltage switch operating mechanism is 20 to 30ms, and the rotation angle stroke of the measured rotation shaft is about 80 °.
The external microprocessor can select any high-speed singlechip with the SPI communication function. In the embodiment, a GD32F103 single chip microcomputer is selected, an angle reading instruction is sent to an MA702 contactless angle sensor chip every 200 μ s through an SPI protocol, an absolute angle value of a magnetic field generating element is obtained once, and then calculation is performed according to the absolute angle value of the initial position of the measured rotating shaft, so that the rotating angle of the measured rotating shaft is obtained. And finally, communicating the data to the outside according to the requirements of different use scenes.
In this embodiment, the operation speed of the external micro-processing chip can satisfy the requirement of angle data acquisition of the measured rotating shaft. Thus, the complete 12-bit angle data can be read in two frames of data without optimizing the reading speed by reducing the SCLK clock. As shown in fig. 4, the two data frames of the SPI have 16 bits in total, and after 12-bit angle data is acquired, the 4 bits at the end are automatically zero-padded.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (6)
1. Rotation axis angle magnetism measuring device that axle side detected, including magnetic field generation element, magnetic induction unit and outside microprocessor, its characterized in that:
the magnetic field generating element is an annular permanent magnet, and the annular permanent magnet is magnetized in a radial direction;
the magnetic field generating element is nested on the surface of the measured rotating shaft body through the auxiliary clamp and rotates coaxially and synchronously with the measured rotating shaft; the horizontal annular plane of the magnetic field generating element is vertical to the axis of the rotating shaft to be measured;
the core element of the magnetic induction unit is a magnetoelectric induction type sensor based on a Hall effect and is used for inducing the magnetic field generated by the magnetic field generating element;
and the external microprocessor is connected with the magnetic induction unit and is used for reading and processing angle value data generated by the magnetic induction unit.
2. The magnetic measuring device for the angle of a rotating shaft detected on the shaft side according to claim 1, characterized in that:
the auxiliary clamp comprises a lower-layer annular cylinder platform and an upper-layer annular cylinder cover plate, wherein the inner diameter of the lower-layer annular cylinder platform is equal to the diameter of a measured rotating shaft and is nested on the measured rotating shaft body.
3. The magnetic measuring device for the angle of a rotating shaft detected on the shaft side according to claim 2, characterized in that:
the outer diameter of the lower annular cylinder platform is divided into a first part upper outer diameter and a second part lower outer diameter, and the first part upper outer diameter is equal to the annular permanent magnet inner diameter so as to be directly in close contact with and fixed with the annular permanent magnet inner diameter; the lower outer diameter of the second part is slightly smaller than the outer diameter of the annular permanent magnet so as to be used as a bottom support of the annular permanent magnet.
4. The magnetic measuring device for the shaft angle detected by the shaft side of claim 2, wherein:
the inner diameter of the upper-layer annular cylinder cover plate is equal to the outer diameter of the first part of the lower-layer annular cylinder platform, so that the upper-layer annular cylinder cover plate can be sleeved on the lower-layer annular cylinder platform to fix the magnetic field generating element.
5. The magnetic measuring device for the shaft angle detected by the shaft side of claim 1, wherein:
the magnetoelectric induction type sensor adopts an MA702 contactless angle sensor chip.
6. A magnetic measuring method of a rotation axis angle for an axial side detection, using the measuring apparatus of any one of claims 1 to 5, characterized in that:
connecting the center of a circle of the magnetic field generating element with the geometric center of the magnetoelectric induction type sensor, wherein the connecting line is vertical to the front side edge of the magnetoelectric induction type sensor, so that the height of the horizontal center line of the magnetic field generating element is consistent with that of the horizontal center line of the magnetoelectric induction type sensor; the magnetoelectric induction type sensor is not in contact with the magnetic field generating element and is as close as possible, and the gap is 0.1-1 mm;
the external microprocessor sends a well-agreed instruction to the magnetic induction unit in an SPI communication mode, and the magnetic induction unit reads an angle value and returns the angle value to the external microprocessor after receiving the instruction; and the external microprocessor calculates the rotation angle of the measured rotating shaft according to the acquired absolute angle value and the absolute angle value of the initial position of the measured rotating shaft.
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| CN202210097402.2A CN114577109A (en) | 2022-01-27 | 2022-01-27 | Magnetic measuring device and method for rotating shaft angle of shaft side detection |
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| CN202210097402.2A CN114577109A (en) | 2022-01-27 | 2022-01-27 | Magnetic measuring device and method for rotating shaft angle of shaft side detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116259212A (en) * | 2023-05-12 | 2023-06-13 | 合肥威艾尔智能技术有限公司 | Non-contact magnetic induction simulation console device and linear correction method |
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| CN116259212B (en) * | 2023-05-12 | 2023-08-08 | 合肥威艾尔智能技术有限公司 | Non-contact magnetic induction simulation console device and linear correction method |
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