CN101216333A - Capacitance type angle sensor calibration apparatus - Google Patents
Capacitance type angle sensor calibration apparatus Download PDFInfo
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- CN101216333A CN101216333A CNA2008100323835A CN200810032383A CN101216333A CN 101216333 A CN101216333 A CN 101216333A CN A2008100323835 A CNA2008100323835 A CN A2008100323835A CN 200810032383 A CN200810032383 A CN 200810032383A CN 101216333 A CN101216333 A CN 101216333A
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- electricity encoder
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Abstract
The invention relates to a calibration device for a capacitive angular transducer, which comprises a calibration table, a capacitive angular transducer and a computer, wherein the capacitive angular transducer and an increment type photoelectric encoder are concentrically disposed on the calibration table, the output ports of the two devices are respectively connected with the input port of the computer through a CPLD data acquisition circuit via a signal wire, and the inputted signals from the two device are analyzed and processed by the computer to obtain the calibration parameters of the capacitive angular transducer. The invention has the advantages of simple structure and process, easy manufacturing, low cost, convenient application, and high reliability.
Description
Technical field
The present invention relates to a kind of capacitance type angle sensor calibration apparatus, more particularly, relate to the special-purpose capacitance type angle sensor calibration apparatus of bearing circle among a kind of automobile electric booster steering system EPS.
Background technology
In automobile electric booster steering system EPS, angular transducer can obtain the bearing circle anglec of rotation effectively, helps the realization of EPS controlling models and the optimization of control performance.EPS is that a cover collection physical construction, assist motor, sensor, controller are the assembly parts of one.Characteristics such as the automobile sensor amount of having is big, security requirement height, therefore, effective demarcation of automobile-used angular transducer parameter is an important research contents always.This caliberating device is mainly used in the parameter of demarcating a kind of specific steering wheel for vehicle angular transducer.If it is improper to demarcate the evaluation index that adopts, may make calibration result can not reflect actual measured value, even lose the demarcation meaning, the brand-new caliberating device of a cover has been proposed for this reason.
Summary of the invention
The purpose of this invention is to provide that a kind of structural manufacturing process is simple, easily manufactured, low-cost, easy to use, reliability is high, calibration principle capacitance type angle sensor calibration apparatus clearly.
For achieving the above object, design of the present invention is:
Principle of the present invention basis is an angle parameter of demarcating this capacitance type angle sensor by the corner size that incremental optical-electricity encoder measures as the corner value of standard.The present invention is installed in incremental optical-electricity encoder and capacitance type angle sensor on the same turning axle, when turning axle rotates, capacitance type angle sensor and incremental optical-electricity encoder are followed the tracks of the turning axle corner simultaneously and are changed, and export correspondent voltage and pulse signal in real time.Finally, the corner size that records with the increment photoelectric coding by Computer Processing analyzes, demarcates the parameter of capacitance type angle sensing as the corner value of standard.Advantage of the present invention is: structural manufacturing process is simple, easily manufactured, low-cost, easy to use, reliability is high, calibration principle is clear.
Capacitance type angle sensor calibration apparatus of the present invention, it is made up of calibrating table, capacitance type angle sensor and computing machine.Calibrating table is the mechanical hook-up of capacitance type angle sensor calibration apparatus, is used to install capacitance type angle sensor and incremental optical-electricity encoder; Incremental optical-electricity encoder is that all pulse numbers are 2500 tubular shaft incremental optical-electricity encoder; Capacitance type angle sensor is the specific angular transducer that obtains the bearing circle anglec of rotation; The CPLD data acquisition circuit is a core with the CPLD chip, gathers the two-way angle signal of incremental optical-electricity encoder and capacitance type angle sensor output respectively; The two-way angle signal that computing machine collects by obtaining the CPLD data acquisition circuit in real time, the angle value that records with incremental optical-electricity encoder with calibration software is the standard angle value again, analyzes and demarcate the parameter of capacitance type angle sensor.
According to above-mentioned inventive concept, the present invention adopts following technical proposals:
A kind of capacitance type angle sensor calibration apparatus, comprise calibrating table, capacitance type angle sensor and computing machine, it is characterized in that: the described capacitance type angle sensor of coaxial installation and an incremental optical-electricity encoder on the described calibrating table, the delivery outlet of described capacitance type angle sensor and incremental optical-electricity encoder is connected the input port of described computing machine through a CPLD data acquisition circuit respectively by signal wire, and the signal of its input is handled the calibrating parameters that obtains capacitance type angle sensor by Computer Analysis
Above-mentioned calibrating table is made up of base, support, turning axle, retainer and axle sleeve.Fixed support on the base; Prop up top of the trellis fixed installation axle sleeve; Turning axle is installed in it can freely be rotated, and an end of turning axle has a swing handle; The retainer bottom is fixed on the base, and the top is fixedly mounted on the capacitance type angle sensor on the turning axle and the housing of incremental optical-electricity encoder.
Above-mentioned CPLD data acquisition circuit mainly comprises CPLD (CPLD), photoelectrical coupler, A/D converter, frequency measurement, computer parallel port.Design has quadruplicated frequency circuit, counting circuit and computer interface circuit in the CPLD internal logic; Photoelectrical coupler can be eliminated noise effectively, improves the photoelectric encoder signal transfer quality; A/D converter can convert the voltage signal of capacitance type angle sensor output to digital signal that computing machine can be discerned; Computer parallel port can realize the both-way communication between CPLD data acquisition circuit and the computing machine.The pulse signal of incremental optical-electricity encoder is input to CPLD inside through photoelectrical coupler, is input in the computing machine through computer interface circuit control computer parallel port; The voltage of capacitance type angle sensor output is after A/D converter converts digital signal to, and machine interface circuit control computer parallel port is input in the computing machine as calculated; Frequency measurement is the expansion design of CPLD data acquisition circuit.
Incremental optical-electricity encoder of the present invention is that all pulse numbers are 2500 tubular shaft incremental optical-electricity encoder.
Capacitance type angle sensor of the present invention is a vehicle steering specialty angular transducer, by a kind of change structure capacitive pole plate, mainly be made up of moving plate and stator, behind the heterogeneous electric field of turning axle drive moving plate rotation formation, the correspondent voltage signal is exported in synthetic coupling in real time through electric field.
Computing machine of the present invention is mainly used in and obtains capacitance type angle sensor and the incremental optical-electricity encoder two paths of signals that the CPLD data acquisition circuit collects in real time.
The present invention compared with prior art has following conspicuous outstanding substantive distinguishing features and remarkable advantage:
1. because calibrating table of the present invention is simple in structure, easy to use, improved efficient.And the swing handle of calibrating table is designed to manually control the turning axle rotation and the rotation of Electric Machine Control turning axle all provides possibility.
2. because the corner that has adopted incremental optical-electricity encoder to record is demarcated capacitance type angle sensor as standard, the pulse signal antijamming capability of its output is strong, stability is high, it is convenient to gather.Simultaneously, the pulse signal of incremental optical-electricity encoder has improved the precision of demarcating after 4 frequency multiplier circuits are handled.
Description of drawings
Fig. 1 is the system architecture diagram of one embodiment of the invention.
Fig. 2 is the calibrating table structural drawing of Fig. 1 example.
Fig. 3 is a CPLD data acquisition circuit structured flowchart of the present invention.
Fig. 4 is the Computer Processing FB(flow block) of Fig. 1 example.
Embodiment
Details are as follows in conjunction with the accompanying drawings for a preferred embodiment of the present invention:
This capacitance type angle sensor calibration apparatus system architecture diagram as shown in Figure 1.Comprise calibrating table 1, capacitance type angle sensor 2, incremental optical-electricity encoder 3, CPLD data acquisition circuit 4 and computing machine 5.Calibrating table 1 by the turning axle 2 that rotates in real time output capacitance formula angular transducer 2 and incremental optical-electricity encoder 3 two paths of signals to CPLD data acquisition circuit 4, signal is handled after computer parallel port is transferred to computing machine 5 by CPLD data acquisition circuit 4, and the calibrating parameters of back output capacitance formula angular transducer 2 is analyzed, handled to computing machine 5.
When turning axle 7 rotates, drive capacitance type angle sensor 2 moving pole piece and incremental optical-electricity encoder 3 coaxial rotation, simultaneously, the pulse signal of the voltage signal of capacitance type angle sensor 2 and incremental optical-electricity encoder 3 arrives CPLD data acquisition circuit 4 by signal wire transmits.Signal is handled after computer parallel port is transferred to computing machine 5 by CPLD data acquisition circuit 4, computing machine 5 is that standard value is analyzed the angle signal that capacitance type angle sensor 2 collects with incremental optical-electricity encoder 3 measured angle signals, finally demarcates the parameter of capacitance type angle sensor 2.
Above-mentioned calibrating table 1 structure as shown in Figure 2.Comprise incremental optical-electricity encoder 3, turning axle 7, retainer 8, base 9, capacitance type angle sensor 2, axle sleeve 11, support 10.Support 10 is fixed on the base 9, axle sleeve 11 is fixedly mounted on support 10 tops, turning axle 7 is installed in the axle sleeve 11, can freely rotate, capacitance type angle sensor 2 and incremental optical-electricity encoder 3 are installed in the middle part of turning axle and the end of an end respectively, and with the top of retainer 8 fixed plate of fixed capacity formula angular transducer 2 and the housing of incremental optical-electricity encoder 3 respectively, the bottom of retainer 8 is fixedly mounted on the base 9.When rotating turning axle, capacitance type angle sensor 2 and incremental optical-electricity encoder 3 are followed the tracks of the angle that turning axle turns in real time, export corresponding signal respectively.The voltage signal of capacitance type angle sensor 2 is through A/D converter 17 inputs, and final, machine parallel port 15 outputs to computing machine 5 as calculated.The pulse signal of incremental optical-electricity encoder 3 is through photoelectrical coupler 19 inputs, and final, machine parallel port 15 outputs to computing machine 5 as calculated.
Above-mentioned CPLD data acquisition circuit 4 figure as shown in Figure 3.The master chip of this CPLD data acquisition circuit 4 adopts the EPM7128S-100 of altera corp, and design has quadruplicated frequency circuit 13, counting circuit 16 and computer interface circuit 14 in its internal logic.The pulse signal of incremental optical-electricity encoder 3 is input to CPLD inside through photoelectrical coupler 19, after pulse signal process quadruplicated frequency circuit 13 quadruples, the umber of pulse of revolution output is increased to 10000 pulses of revolution output by original 2500, counting circuit 16 writes down the umber of pulse of exporting after the quadruples (umber of pulse is exactly the actual angle that turning axle turns over), and is input in the computing machine 5 by computer interface circuit 14 control computer parallel ports 15.A/D converter 17 adopts MAX197, and it is 12 high-speed a/d converters.The voltage signal of capacitance type angle sensor 2 outputs is input in the computing machine 5 machine interface circuit 14 control computer parallel ports 15 as calculated by data bus D0-D7 after A/D converter 17 converts digital signal to.Frequency measurement 18 in the CPLD data acquisition circuit 4 is expansion design of circuit.Above-mentioned computing machine 5 analyzing and processing flow processs as shown in Figure 4.Call in hardware drive program behind the system boot.Whether detection and computer port have the signal input, if do not have, just wait for always that up to computer parallel port the signal input is arranged.If computer parallel port has the signal input, read the parallel port data immediately, and store the data in the calculator memory.Simultaneously, data are analyzed and handled, and to reading in the diagnosis of the data amount of transfiniting, if the amount of transfiniting then jumps to the amount of transfiniting at once and reports to the police and handle subroutine, if the amount of transfiniting not, then draw performance plot, so just finished data processing one time according to the input data.Then, call in next group data, repeat top operation, up to handling the data that all read, and draw good complete performance diagram, final, the calibrating parameters of output angle sensor is finished the calibration process of whole capacitor formula angular transducer.
Claims (4)
1. capacitance type angle sensor calibration apparatus, comprise calibrating table (1), capacitance type angle sensor (2) and computing machine (5), it is characterized in that: a coaxial installation capacitance type angle sensor (2) and an incremental optical-electricity encoder (3) on the described calibrating table, the delivery outlet of a described capacitance type angle sensor (2) and an incremental optical-electricity encoder (3) is connected the input port of described computing machine (5) through a CPLD data acquisition circuit (4) respectively by signal wire, and the signal of its input is obtained the calibrating parameters of capacitance type angle sensor by computing machine (5) analyzing and processing.
2. capacitance type angle sensor calibration apparatus according to claim 1 is characterized in that: described calibrating table (1) is made up of base (9), support (10), turning axle (7), retainer (8) and axle sleeve (11).Base (9) is gone up fixed support (10); Support (10) top fixed installation axle sleeve (11); Turning axle (7) is installed in the axle sleeve (11), and can freely rotate, and an end of turning axle (7) has a swing handle; Retainer (8) bottom is fixed on the base (9), and the top is fixedly mounted on the capacitance type angle sensor (2) on the turning axle (7) and the housing of incremental optical-electricity encoder (3).
3. capacitance type angle sensor calibration apparatus according to claim 1, it is characterized in that: described CPLD data acquisition circuit (4) is a core with the EPM7128S-100 chip, design has quadruplicated frequency circuit (13) in its internal logic, counting circuit (16) and computer interface circuit (14) can be gathered the signal of incremental optical-electricity encoder (3) and capacitance type angle sensor (2) by signal wire respectively.
4. capacitance type angle sensor calibration apparatus according to claim 1, it is characterized in that: described incremental optical-electricity encoder (3) is that all pulse numbers are 2500 tubular shaft incremental optical-electricity encoder, signal is handled Later Zhou Dynasty, one of the Five Dynasties's pulse number by quadruplicated frequency circuit and is increased to 10000, has improved measuring accuracy.
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| CNA2008100323835A CN101216333A (en) | 2008-01-08 | 2008-01-08 | Capacitance type angle sensor calibration apparatus |
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| CNA2008100323835A CN101216333A (en) | 2008-01-08 | 2008-01-08 | Capacitance type angle sensor calibration apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2230488A1 (en) * | 2009-03-17 | 2010-09-22 | Honeywell International Inc. | Calibration to improve weather radar positioning determination |
| CN102494710A (en) * | 2011-12-01 | 2012-06-13 | 中国科学院长春光学精密机械与物理研究所 | Angle measurement precision detection apparatus of encoder and detection method thereof |
| CN102818580A (en) * | 2012-09-06 | 2012-12-12 | 西华大学 | Position detector of non-contact sensor and detection method of position detector |
| CN103123361A (en) * | 2012-11-22 | 2013-05-29 | 常州天大龙成节能环保科技有限公司 | MEMS (micro-electromechanical system) angular speed and acceleration sensor automatic demarcating method and system thereof |
| CN104179588A (en) * | 2013-05-28 | 2014-12-03 | 上海汽车集团股份有限公司 | Steering wheel angle sensor based idle steering torque compensation method, system and vehicle |
| CN104197978A (en) * | 2014-09-25 | 2014-12-10 | 南京埃斯顿自动化股份有限公司 | Data detecting device of angle rotation control equipment |
| CN106679599A (en) * | 2016-12-02 | 2017-05-17 | 长春工程学院 | Hydroelectric set axis measurement device |
| CN108680097A (en) * | 2018-05-17 | 2018-10-19 | 黄云汉 | A kind of resistance-type angular sensor and its application method |
| CN110356473A (en) * | 2019-07-24 | 2019-10-22 | 重庆长安汽车股份有限公司 | A kind of vehicle redundancy rotation angular sensing system |
-
2008
- 2008-01-08 CN CNA2008100323835A patent/CN101216333A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8077080B2 (en) | 2009-03-17 | 2011-12-13 | Honeywell International Inc. | Calibration to improve weather radar positioning determination |
| EP2230488A1 (en) * | 2009-03-17 | 2010-09-22 | Honeywell International Inc. | Calibration to improve weather radar positioning determination |
| CN102494710A (en) * | 2011-12-01 | 2012-06-13 | 中国科学院长春光学精密机械与物理研究所 | Angle measurement precision detection apparatus of encoder and detection method thereof |
| CN102494710B (en) * | 2011-12-01 | 2014-03-12 | 中国科学院长春光学精密机械与物理研究所 | Angle measurement precision detection apparatus of encoder and detection method thereof |
| CN102818580B (en) * | 2012-09-06 | 2015-01-07 | 西华大学 | Position detector of non-contact sensor and detection method of position detector |
| CN102818580A (en) * | 2012-09-06 | 2012-12-12 | 西华大学 | Position detector of non-contact sensor and detection method of position detector |
| CN103123361B (en) * | 2012-11-22 | 2015-11-25 | 常州天大龙成节能环保科技有限公司 | MEMS angular velocity and acceleration transducer automatic calibration method and system thereof |
| CN103123361A (en) * | 2012-11-22 | 2013-05-29 | 常州天大龙成节能环保科技有限公司 | MEMS (micro-electromechanical system) angular speed and acceleration sensor automatic demarcating method and system thereof |
| CN104179588A (en) * | 2013-05-28 | 2014-12-03 | 上海汽车集团股份有限公司 | Steering wheel angle sensor based idle steering torque compensation method, system and vehicle |
| CN104197978A (en) * | 2014-09-25 | 2014-12-10 | 南京埃斯顿自动化股份有限公司 | Data detecting device of angle rotation control equipment |
| CN104197978B (en) * | 2014-09-25 | 2016-08-31 | 南京埃斯顿自动化股份有限公司 | A kind of data detection device of angle rotary control device |
| CN106679599A (en) * | 2016-12-02 | 2017-05-17 | 长春工程学院 | Hydroelectric set axis measurement device |
| CN108680097A (en) * | 2018-05-17 | 2018-10-19 | 黄云汉 | A kind of resistance-type angular sensor and its application method |
| CN110356473A (en) * | 2019-07-24 | 2019-10-22 | 重庆长安汽车股份有限公司 | A kind of vehicle redundancy rotation angular sensing system |
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Open date: 20080709 |