CN110873549A - Angle measuring system and angle measuring method - Google Patents
Angle measuring system and angle measuring method Download PDFInfo
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- CN110873549A CN110873549A CN201811003284.4A CN201811003284A CN110873549A CN 110873549 A CN110873549 A CN 110873549A CN 201811003284 A CN201811003284 A CN 201811003284A CN 110873549 A CN110873549 A CN 110873549A
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- rotary transformer
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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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- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides an angle measuring system which comprises a rotary transformer and a vehicle control unit in signal connection with the rotary transformer. The angle measuring system also comprises a carrier generator for transmitting an excitation signal to the rotary transformer, a signal processing module for receiving the signal of the rotary transformer and an angle acquisition module which is connected with the signal processing module and used for obtaining the rotor rotation angle through the signal output by the signal processing module. The carrier wave generator, the signal processing module and the angle acquisition module are all arranged on the vehicle control unit. The invention also provides an angle measuring method. According to the angle measuring system and the angle measuring method, the signal processing module for processing the signal of the rotary transformer is arranged in the vehicle control unit, so that the manufacturing cost of the product is reduced.
Description
Technical Field
The present invention relates to an angle measuring system and an angle measuring method, and more particularly, to an angle vehicle system and an angle measuring method for a vehicle.
Background
Angle measurement is particularly widely used in the vehicle sector. For example, the measurement of the rotation angle of the steering wheel or the measurement of the rotation speed of the motor. The measurement of the angle of the vehicle affects the safety and usability of the vehicle, so accurate angle vehicle is particularly important.
Currently, the commonly used angle measurement is of the hall type or electromagnetic induction (i.e., resolver) type. Since the hall type is susceptible to interference, the electromagnetic induction type is often used. During measurement, the rotary transformer obtains a rotation angle signal of the rotor. Then, the special chip calculates the rotation angle of the rotor by an algorithm. And the calculated rotation angle value is sent to a vehicle control unit for corresponding control. Since a dedicated chip is required to calculate the rotational angle of the rotor, the manufacturing cost of the angle measuring system is increased.
Disclosure of Invention
The invention aims to provide an angle measuring system and an angle measuring method which can reduce the manufacturing cost.
According to one aspect of the invention, an angle measurement system is provided that includes a resolver and a vehicle control unit in signal connection with the resolver. The angle measurement system further comprises a carrier wave generator for transmitting an excitation signal to the rotary transformer, a signal processing module for receiving the signal of the rotary transformer, and an angle acquisition module which is connected with the signal processing module and used for obtaining the rotor rotation angle through the signal output by the signal processing module, wherein the carrier wave generator, the signal processing module and the angle acquisition module are all arranged on the vehicle control unit.
Preferably, the rotary transformer comprises an excitation coil connected with the carrier wave generator, a rotor, and a first receiving coil and a second receiving coil which are orthogonally arranged, and the signal processing module comprises a first signal processing device connected with the first receiving coil and a second signal processing device connected with the second receiving coil.
Preferably, the angle acquisition module receives signals sent by the first signal processing device and the second signal processing device, and obtains the rotor rotation angle through an application layer table look-up mode according to the received signals.
Preferably, the table is a two-dimensional table calibrated by experiment.
Preferably, the first signal processing device includes a first filter connected to the first receiving coil, a first rectifier connected to the first filter, a first integrator connected to the first rectifier, and a first result register connected to the first integrator, the second signal processing device includes a second filter connected to the second receiving coil, a second rectifier connected to the second filter, a second integrator connected to the second rectifier, and a second result register connected to the second integrator, and signals output by the first result register and the second result register are transmitted to the angle obtaining module.
Preferably, the signal u1 output by the first signal processing device is k × Em sin (θ), and the signal u2 output by the second signal processing device is k × Em cos (θ), where k is a transmission coefficient, Em is an excitation signal amplitude, and θ is a rotor rotation angle.
Preferably, the vehicle control unit is provided with a DSADC module, and the carrier generator and the signal processing module are integrated in the DSADC module.
Preferably, the rotary transformer is integrated onto a circuit board.
Preferably, the angle measuring system is used for measuring an accelerator/brake pedal angle, a steering wheel angle or a motor angle.
According to an aspect of the present invention, there is provided an angle measuring method including:
transmitting an excitation signal to the excitation coil through a carrier generator;
the first receiving coil and the second receiving coil respectively output a first analog signal and a second analog signal under the excitation of the exciting coil;
the first signal processing device processes the first signal and outputs a first digital signal, and the second digital signal processing device processes the second signal and outputs a second digital signal;
the angle acquisition module receives the first digital signal and the second digital signal and obtains the rotor rotation angle in a two-dimensional table look-up mode.
According to the angle measuring system and the angle measuring method provided by the invention, the signal processing module for processing the signal of the rotary transformer is arranged in the vehicle control unit, so that the manufacturing cost of the product is reduced.
Drawings
FIG. 1 is a block diagram of an angle measurement system of the present invention.
Fig. 2 is a block diagram of a signal processing apparatus according to the present invention.
FIG. 3 is a flow chart of an angle measuring method of the present invention.
Detailed Description
Referring to fig. 1, the present invention provides an angle measuring system including a resolver 101 and a vehicle control unit 200 in signal connection with the resolver 101. The angle measuring system further comprises a carrier generator 211 for transmitting an excitation signal to the rotary transformer 101, a signal processing module a for receiving the signal of the rotary transformer 101, and an angle obtaining module 22 connected to the signal processing module a for obtaining the rotor rotation angle through the signal output by the signal processing module a. The carrier generator 211, the signal processing module a, and the angle acquisition module 22 are all provided in the vehicle control unit 200. The present invention reduces the manufacturing cost of the angle measuring system by providing the signal processing module a in the vehicle control unit 200.
The resolver 101 includes an excitation coil 11 connected to a carrier wave generator 211, a rotor 12, and a first receiving coil 13 and a second receiving coil 14 arranged orthogonally. The signal processing module a comprises first signal processing means 212 connected to the first receiving coil 13 and second signal processing means 213 connected to the second receiving coil 14. The signal of the coil can be changed by shielding the coil when the rotor 12 rotates.
The angle obtaining module 22 receives the signals sent by the first signal processing device 212 and the second signal processing device 213, and obtains the rotor rotation angle according to the received signals by using an application layer table look-up method. The invention obtains the rotor rotation angle by using an application layer table look-up mode, and can simply obtain the rotor rotation angle without complex calculation.
In a preferred embodiment, the table is a two-dimensional table calibrated by experiment. The two-dimensional table is calibrated in advance by an experimental method. The calibrated two-dimensional table may be used in the same series of applications for the angle acquisition module 22.
The signal u1 output by the first signal processing device 212 is k × Em sin (θ), and the signal u2 output by the second signal processing device 213 is k × Em cos (θ), where k is a transfer coefficient, Em is an excitation signal amplitude, and θ is a rotor rotation angle. The angle obtaining module 22 may obtain the rotor rotation angle quickly by applying a layer table look-up through the received signals u1 and u 2.
The vehicle control unit 200 is provided with a DSADC module 21. The carrier generator 211 and the signal processing module a are integrated within the DSADC block 21.
The resolver 101 is integrated on the circuit board 100. The present invention reduces the manufacturing cost of the product by integrating the signal processing module a that processes the signal of the resolver 101 into the vehicle control unit 200.
As further shown in fig. 2, the first signal processing means 212 comprises a first filter 2121 connected to the first receiving coil 13, a first rectifier 2122 connected to the first filter 2121, a first integrator 2123 connected to the first rectifier 2122, and a first result register 2124 connected to the first integrator 2123. The second signal processing means 213 comprises a second filter 2131 connected to the second receiving coil 14, a second rectifier 2132 connected to the second filter 2131, a second integrator 2133 connected to the second rectifier 2132, and a second result register 2134 connected to the second integrator 2133. The signals output by the first result register 2124 and the second result register 2134 are passed to the angle acquisition module 22. The first analog signal of the first receiving coil 13 is processed by the first signal processing device 212 to output a first digital signal, and the second analog signal of the second receiving coil 14 is processed by the second signal processing device 213 to output a second digital signal.
The invention utilizes the DSADC module 21 in the vehicle control unit 200 to measure the angle based on the principle of the rotary transformer 101, and does not need an additional chip. The DSADC module 21 integrates the carrier generator 211 to generate the excitation signal, the rectifier, the filter and the integrator to demodulate the 2-path receive coil signal and extract the amplitude information, and compensate for the delay. And finally, obtaining the rotor angle information in real time by a table look-up method of software.
The angle measurement system may be used to measure accelerator/brake pedal angle, steering wheel angle, or motor angle.
As further shown in fig. 3, the present invention also provides an angle measuring method, which includes:
an excitation signal is transmitted to the excitation coil 11 through the carrier generator 211. The transmitted signal is an analog signal. The exciting coil 11 generates a magnetic field upon receiving the signal.
The first receiving coil 13 and the second receiving coil 14 output a first analog signal and a second analog signal, respectively, upon excitation of the exciting coil 11. The first and second receiving coils 13, 14 generate a first and a second analog signal under the influence of a magnetic field.
The first signal processing means 212 processes the first analog signal and outputs a first digital signal, and the second signal processing means 213 processes the second analog signal and outputs a second digital signal.
The angle obtaining module 22 receives the first digital signal and the second digital signal and obtains a rotor rotation angle through a two-dimensional table look-up manner. The invention can easily obtain the rotor rotation angle by using a two-dimensional table look-up mode, and reduces the complexity of software compared with the traditional method of calculating the rotor rotation angle by software.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. The angle measuring system comprises a rotary transformer (101) and a vehicle control unit (200) in signal connection with the rotary transformer (101), and is characterized by further comprising a carrier generator (211) for transmitting an excitation signal to the rotary transformer (101), a signal processing module (A) for receiving a signal of the rotary transformer (101), and an angle acquisition module (22) which is connected with the signal processing module (A) and used for acquiring a rotor rotation angle through the signal output by the signal processing module (A), wherein the carrier generator (211), the signal processing module (A) and the angle acquisition module (22) are all arranged on the vehicle control unit (200).
2. An angle measuring system according to claim 1, characterized in that the rotary transformer (101) comprises an excitation coil (11) connected to a carrier wave generator (211), a rotor (12) and a first receiving coil (13) and a second receiving coil (14) arranged orthogonally, the signal processing module (a) comprising a first signal processing means (212) connected to the first receiving coil (13) and a second signal processing means (213) connected to the second receiving coil (14).
3. The angle measurement system of claim 3, wherein the angle acquisition module (22) receives the signals from the first signal processing device (212) and the second signal processing device (213), and obtains the rotor rotation angle by using an application layer table look-up according to the received signals.
4. The angle measurement system of claim 3, wherein the table is a two-dimensional table calibrated by experiment.
5. Angle measuring system according to claim 3, characterized in that the first signal processing means (212) comprise a first filter (2121) connected to the first receiving coil (13), a first rectifier (2122) connected to the first filter (2121), a first integrator (2123) connected to the first rectifier (2122), and a first result register (2124) connected to the first integrator (2123), said second signal processing means (213) comprising a second filter (2131) connected to the second receiving coil (14), a second rectifier (2132) connected to the second filter (2131), a second integrator (2133) connected to the second rectifier (2132) and a second result register (2134) connected to the second integrator (2133), the signals output by the first result register (2124) and the second result register (2134) are transmitted to an angle acquisition module (22).
6. The angle measurement system according to claim 5, characterized in that the first signal processing means (212) outputs a signal u1 ═ k × Em × sin (θ), and the second signal processing means (213) outputs a signal u2 ═ k × Em cos (θ), where k is a transmission coefficient, Em is an excitation signal amplitude, and θ is a rotor rotation angle.
7. Angle measurement system according to any one of claims 1 to 6, characterized in that the vehicle control unit (200) is provided with a DSADC module (21), the carrier generator (211) and a signal processing module
(A) Is integrated within the DSADC block (21).
8. Angle measurement system according to any of claims 1 to 6, characterized in that the resolver (101) is integrated onto a circuit board (100).
9. The angle measurement system of claim 1, wherein the angle measurement system is used to measure an accelerator/brake pedal angle, a steering wheel angle, or a motor angle.
10. An angle measuring method, characterized by comprising:
transmitting an excitation signal to the excitation coil (11) by a carrier generator (211);
the first receiving coil (13) and the second receiving coil (14) respectively output a first analog signal and a second analog signal under the excitation of the exciting coil (11);
a first signal processing means (212) processes the first signal and outputs a first digital signal, and a second digital signal processing means (213) processes the second signal and outputs a second digital signal;
the angle acquisition module (22) receives the first digital signal and the second digital signal and obtains the rotor rotation angle in a two-dimensional table look-up mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003284.4A CN110873549A (en) | 2018-08-30 | 2018-08-30 | Angle measuring system and angle measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811003284.4A CN110873549A (en) | 2018-08-30 | 2018-08-30 | Angle measuring system and angle measuring method |
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| CN110873549A true CN110873549A (en) | 2020-03-10 |
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| CN201811003284.4A Pending CN110873549A (en) | 2018-08-30 | 2018-08-30 | Angle measuring system and angle measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353053A (en) * | 2021-06-23 | 2021-09-07 | 精进电动科技股份有限公司 | Hybrid power system and method for acquiring engine crank angle in hybrid power system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202599335U (en) * | 2012-06-27 | 2012-12-12 | 同济大学 | Rotary transformer position measurement system |
| CN204269070U (en) * | 2014-12-01 | 2015-04-15 | 杭州湘滨电子科技有限公司 | A kind of change of revolving of measuring permanent-magnet synchronous motor rotor position angle encourages and decoder module |
| CN107063075A (en) * | 2017-05-27 | 2017-08-18 | 上海世昱电子技术有限公司 | A kind of angle sensing device |
-
2018
- 2018-08-30 CN CN201811003284.4A patent/CN110873549A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202599335U (en) * | 2012-06-27 | 2012-12-12 | 同济大学 | Rotary transformer position measurement system |
| CN204269070U (en) * | 2014-12-01 | 2015-04-15 | 杭州湘滨电子科技有限公司 | A kind of change of revolving of measuring permanent-magnet synchronous motor rotor position angle encourages and decoder module |
| CN107063075A (en) * | 2017-05-27 | 2017-08-18 | 上海世昱电子技术有限公司 | A kind of angle sensing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353053A (en) * | 2021-06-23 | 2021-09-07 | 精进电动科技股份有限公司 | Hybrid power system and method for acquiring engine crank angle in hybrid power system |
| CN113353053B (en) * | 2021-06-23 | 2023-10-03 | 精进电动科技股份有限公司 | Hybrid power system and method for obtaining crank angle of engine in system |
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Address after: 130033 No. 1981, Wuhan Road, Changchun Economic Development Zone, Jilin, China Applicant after: WeiPai automotive electronics (Changchun) Co., Ltd Address before: 130033 No. 1981, Wuhan Road, Changchun Economic Development Zone, Jilin, China Applicant before: Shibeite automotive electronics (Changchun) Co., Ltd. |
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Application publication date: 20200310 |
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