CN202281593U - Precision detection system of rotary transformer - Google Patents
Precision detection system of rotary transformer Download PDFInfo
- Publication number
- CN202281593U CN202281593U CN2011203790174U CN201120379017U CN202281593U CN 202281593 U CN202281593 U CN 202281593U CN 2011203790174 U CN2011203790174 U CN 2011203790174U CN 201120379017 U CN201120379017 U CN 201120379017U CN 202281593 U CN202281593 U CN 202281593U
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- rotary transformer
- detection system
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Abstract
The present utility model discloses a precision detection system of a rotary transformer. The system comprises the rotary transformer and a photoelectric rotary encoder arranged on a motor shaft, a rotary transformer auxiliary circuit, a data acquisition circuit and a host computer. The precision detection system of the rotary transformer can be used for accurately evaluating measuring precision during processes of fixed rotating speed, acceleration and deceleration of the motor based on a position detection system of the rotary transformer, shortages of a design can be found, and design can be improved. Moreover, the testing platform is small in volume and low in costs, has small influences on detected equipment, and measuring precision of the detected equipment can be evaluated objectively.
Description
Technical field
The utility model relates to the automotive electronics electric field, particularly relates to a kind of detection system of sensor accuracy.
Background technology
Position and speed pickup in the new-energy automobile (for example hybrid vehicle, electric automobile etc.) originally adopt the photo-electric rotary encoder mostly, replace but promptly be rotated transformer (resolver) in recent years.Rotary encoder has higher resolution though this is, shakes badly easily, and frequency of maintenance is high; And dust and greasy dirt are not afraid of in the high-intensity vibrations of rotary transformer ability, long service life, and failure rate is low.
See also Fig. 1, this is a position detecting system based on rotary transformer.Under the control of MCU (microcontroller) 10, the pair of output of demoder (Decoder) 11 produces the pumping signal of a high frequency, and is as shown in Figure 2.This pumping signal is promptly carried out voltage power and is amplified earlier through blasting impact damper (Excitation Buffer) 12, is added to a pair of input end of rotary transformer 13 again.Two modulation signals of two pairs of output terminal output of rotary transformer 13, as shown in Figure 3.These two modulation signals are promptly carried out voltage power and are dwindled through decoder input buffer device (Decoder Input Buffer) 14, are added to two pairs of input ends of demoder 11 again.
The stator and the anglec of rotation between rotor of supposing rotary transformer 13 are θ, so two modulation signals being exported of rotary transformer 13 can be interpreted as input simply pumping signal respectively with the sine of anglec of rotation θ, the product of cosine.Demoder 11 can be tried to achieve anglec of rotation θ according to certain algorithm from these two modulation signals, thereby realizes the measurement of angle.
The measuring accuracy of position detecting system shown in Figure 1 determines jointly that by demoder 11, excitation impact damper 12, rotary transformer 13 and decoding input buffer 14 this measuring accuracy directly influences the performance of Electric Machine Control.So detect the precision of this position detecting system exactly, particularly its dynamic accuracy (referring to the angle-measurement accuracy of controlled motor in high speed rotating and acceleration, moderating process) is very important.
At present mainly be the detection of on the electromechanical testing stand, accomplishing the precision of position detecting system shown in Figure 1, there is following defective in operation like this:
One of which, electromechanical testing stand can only be measured the precision of this position detecting system under the fixed rotating speed of controlled motor, and can't measure in controlled rotating speed of motor the precision when changing (quickening or deceleration).
Its two, the ground unrest of electromechanical testing stand is bigger, for the detection of precision certain influence is arranged.
Its three, the construction and the maintenance cost of electromechanical testing stand are higher.
The utility model content
The utility model technical matters to be solved provides a kind of accuracy detection system of the position detecting system based on rotary transformer, this system with low cost, compact conformation and powerful.
For solving the problems of the technologies described above, the accuracy detection system of the utility model rotary transformer comprises turntable, rotary transformer auxiliary circuit, data acquisition circuit and host computer;
Said turntable specifically comprises:
A motor;
An electric machine controller that is connected with said motor;
Be installed in said motor the axle on rotary transformer to be tested and a photo-electric rotary encoder;
Said rotary transformer auxiliary circuit specifically comprises:
A demoder;
Connect said rotary transformer to be tested and an excitation impact damper and decoder input buffer device of demoder;
Said data acquisition circuit specifically comprises:
A synchronization control circuit;
A buffer that connects said synchronization control circuit;
A rotary transformer interface that connects said synchronization control circuit and rotary transformer to be tested;
A photo-electric rotary encoder interface that connects said synchronization control circuit and photo-electric rotary encoder;
A host computer interface that connects said synchronization control circuit and host computer.
Further, the accuracy detection system of said rotary transformer also is included as the power supply of all the other each several part power supplies.
The accuracy detection system of the utility model rotary transformer can be more accurate assessment based on the position detecting system of rotary transformer motor be in fixed rotating speed, and quicken, measuring accuracy in the moderating process; The defective that exists in helping to find to design is improved design.And the volume of this test platform is less, and is with low cost, also little to the influence of equipment under test, the measuring accuracy of ability objective assessment equipment under test.
Description of drawings
Fig. 1 is based on the structural representation of the position detecting system of rotary transformer;
Fig. 2 is a pumping signal of rotary transformer input among Fig. 1;
Fig. 3 is two modulation signals of rotary transformer output among Fig. 1;
Fig. 4 is the structural representation of the accuracy detection system of the utility model rotary transformer;
Fig. 5 is the structural representation of the turntable among Fig. 4;
Fig. 6 is the structural representation of the rotary transformer auxiliary circuit among Fig. 4;
Fig. 7 is the structural representation of the data acquisition circuit among Fig. 4.
Description of reference numerals among the figure:
10 is microcontroller (MCU); 11 is demoder; 12 are the excitation impact damper; 13 is rotary transformer; 14 is the decoder input buffer device; 15 is the photo-electric rotary encoder; 20 is turntable; 21 is electric machine controller; 22 is motor; 30 is the rotary transformer auxiliary circuit; 40 is data acquisition circuit; 41 is the rotary transformer interface; 42 is photo-electric rotary encoder interface; 43 is synchronization control circuit; 44 is buffer; 45 is the host computer interface; 50 is host computer.
Embodiment
See also Fig. 4, the accuracy detection system of the utility model rotary transformer comprises turntable 20, rotary transformer auxiliary circuit 30, data acquisition circuit 40 and host computer 50.
See also Fig. 5, said turntable 20 specifically comprises an electric machine controller 21, high-speed electric expreess locomotive 22, rotary transformer 13 and a photo-electric rotary encoder 15 to be tested again.Wherein, electric machine controller 21 be used to control motor 22 at the uniform velocity, quicken or the rotation of slowing down.And motor 22 only is used for driven rotary transformer 13 and 15 rotations of photo-electric rotary encoder, so that the power of this motor 22 does not need is too big.Rotary transformer 13 all is assemblied on the motor shaft with photo-electric rotary encoder 15, and this mechanism design need be considered the replacement of rotary transformer 13.
See also Fig. 6, said rotary transformer auxiliary circuit 30 specifically comprises a demoder 11, an excitation impact damper 12 and a decoder input buffer device 14 again.Wherein, demoder 11 is the output drive signal on the one hand, receives modulation signal on the other hand and calculates the anglec of rotation.Excitation impact damper 12 is used for balanced excitation voltage of signals power, and decoder input buffer device 14 is used for the voltage power of balance modulation signal.This partial circuit is consistent with the position detecting system based on rotary transformer shown in Figure 1.
See also Fig. 7, said data acquisition circuit 40 specifically comprises a rotary transformer interface 41, photo-electric rotary encoder interface 42, synchronization control circuit 43, a buffer 44 and a host computer interface 45 again.Wherein, rotary transformer interface 41 is used for the anglec of rotation that detection obtains based on rotary transformer of Rcv decoder 11 outputs.Photo-electric rotary encoder interface 42 is used to receive photo-electric rotary encoder 15 and detects the anglec of rotation that obtains.43 of synchronization control circuits be used to guarantee from two independently position detecting system obtain the angle information of synchronization.Buffer 44 is used to preserve the data that collect.Host computer interface 45 is used to let host computer 50 can control whole detection system and obtain data from data acquisition circuit 40 to analyze.
Because being based on the Different control principle, rotary transformer 13 and photo-electric rotary encoder 15 come configuration register, detection angles information and image data; Thereby in data acquisition circuit shown in Figure 7 40, how to guarantee to obtain two independently position detecting system be technological difficulties at the angle information of synchronization.Why the synchronization control circuit 43 of the utility model can guarantee the synchro control to two-way independent detection system; Be to realize based on the programmable logic array device of parallel organization through FPGA (Field Programmable Gate Array, field programmable gate array) is this.When data acquisition circuit 40 receives when needing the detection angles information instruction; The state machine of inner two independent parallels of FPGA is started working; Carry out initialization; And through interior slotting time-delay guarantee final two of obtaining independently the angle information of detection system be consistent, be the angle information of synchronization.
For example, rotary transformer 13 on the turntable 20 and rotary transformer auxiliary circuit 30 are as first via detection system, and be known the time delay of its inter-process, for example is x1.Photo-electric rotary encoder 15 on the turntable 20 is as the second tunnel detection system, and also be known the time delay of its inter-process, for example is y1.First state machine in the said synchronization control circuit 43 is gathered the data of first via detection system, through z1 after the time second state machine gather the data of the second tunnel detection system.The z1 here just can be, zero, negative.When z1 is zero, represent that the state machine of two parallel processings is gathered simultaneously.When z1 is negative, represent the collection earlier of second state machine, gather behind first state machine.43 of synchronization control circuits need to guarantee to insert time-delay in first state machine than the time of inserting time-delay in second state machine and many y1+z1-x1 so, can guarantee to be the information of angle detection of synchronization from the acquisition of two-way independent detection system.Y1+z1-x1 just can be, zero, negative.When y1+z1-x1 is zero, represent that two state machines all need not interior inserting and delay time, or interior time-delay of inserting the identical time.When y1+z1-x1 is negative, represent that slotting time-delay is more than first state machine in second state machine.
When typical device application, the data bandwidth of rotary transformer 13 is 16bit, and the data bandwidth of photo-electric rotary encoder 15 is 20bit, that is to say that the same time needs the data of 36bit to be stored in the buffer 44.This does not consider that also data acquisition circuit 40 also need respond the demand of host computer 50 simultaneously at any time, and with data upload to host computer 50 etc.The utility model synchronization control circuit 43 adopts the interface and read-write strategy of HSM in FPGA; The FIFO bandwidth of applying flexible and degree of depth setting; The data of two-way independent detection system are passed through at least one inner FIFO (First In; First Out, FIFO) form synchronous 64bit data, write again in the buffer 44; If simultaneously host computer 50 has the demand of the data uploaded, FPGA can will be stored in data read in the buffer 44 through ping pong scheme and take out and be uploaded to host computer 50 through host computer interface 45.
Said host computer 50 for example is a PC, wherein is built-in with data processing software, is used for controlling whole detection system and obtains data from data acquisition circuit 40 analyzing, and man-machine interface interface etc. is provided.Aspect the whole detection system of control, comprising: the duty (motor 22 is uniform rotation, still quickens to rotate, and still slows down and rotates) that turntable 20 is set; The parameter of configuration rotary transformer 13, rotary transformer auxiliary circuit 30 and photo-electric rotary encoder 15; Analyze the data that data acquisition circuit 40 is preserved, assessment is based on the measuring accuracy (according to comparing with the testing result of photo-electric rotary encoder) of the position detecting system of rotary transformer.
See also Fig. 4～Fig. 7 again, the rotary transformer 13 in the turntable 20 connects the excitation impact damper 12 and decoding input buffer 14 in the rotary transformer auxiliary circuit 30.The rotary transformer interface 41 that demoder 11 in the rotary transformer auxiliary circuit 30 connects in the data acquisition circuit 40.The photo-electric rotary encoder interface 42 that photo-electric rotary encoder 15 in the turntable 20 connects in the data acquisition circuit 40.Host computer interface 45 in the data acquisition circuit 40 connects host computer 50.
Though not shown among Fig. 4, the accuracy detection system of said rotary transformer also includes a power supply, for each module provides power supply.
In sum; The accuracy detection system of the utility model rotary transformer is contained in rotary transformer 13 and photo-electric rotary encoder 15 on the motor rotating axle simultaneously; Pass through data acquisition circuit 40 record rotary transformers 13 and photo-electric rotary encoder 15 then at the measured angle information of synchronization, assess precision based on the position detecting system of rotary transformer through the angular deviation of comparing both.
More than be merely the preferred embodiment of the utility model, and be not used in qualification the utility model.For a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (2)
1. the accuracy detection system of a rotary transformer is characterized in that, comprises turntable, rotary transformer auxiliary circuit, data acquisition circuit and host computer;
Said turntable specifically comprises:
A motor;
An electric machine controller that is connected with said motor;
Be installed in said motor the axle on rotary transformer to be tested and a photo-electric rotary encoder;
Said rotary transformer auxiliary circuit specifically comprises:
A demoder;
Connect said rotary transformer to be tested and an excitation impact damper and decoder input buffer device of demoder;
Said data acquisition circuit specifically comprises:
A synchronization control circuit;
A buffer that connects said synchronization control circuit;
A rotary transformer interface that connects said synchronization control circuit and rotary transformer to be tested;
A photo-electric rotary encoder interface that connects said synchronization control circuit and photo-electric rotary encoder;
A host computer interface that connects said synchronization control circuit and host computer.
2. the accuracy detection system of rotary transformer according to claim 1 is characterized in that, also is included as the power supply of all the other each several part power supplies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203790174U CN202281593U (en) | 2011-10-09 | 2011-10-09 | Precision detection system of rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203790174U CN202281593U (en) | 2011-10-09 | 2011-10-09 | Precision detection system of rotary transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202281593U true CN202281593U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203790174U Expired - Fee Related CN202281593U (en) | 2011-10-09 | 2011-10-09 | Precision detection system of rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202281593U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137235A (en) * | 2015-08-27 | 2015-12-09 | 北京航天控制仪器研究所 | Rotary transformer electric bridge function detection method |
| CN109739122A (en) * | 2018-12-10 | 2019-05-10 | 河北汉光重工有限责任公司 | A kind of half wave excitation fast lock phase method |
| CN110133392A (en) * | 2018-02-09 | 2019-08-16 | 上海蔚兰动力科技有限公司 | Test method and its associated test system |
| CN113295086A (en) * | 2021-05-07 | 2021-08-24 | 恒大新能源汽车投资控股集团有限公司 | Precision testing system of rotary transformer |
-
2011
- 2011-10-09 CN CN2011203790174U patent/CN202281593U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137235A (en) * | 2015-08-27 | 2015-12-09 | 北京航天控制仪器研究所 | Rotary transformer electric bridge function detection method |
| CN105137235B (en) * | 2015-08-27 | 2018-04-10 | 北京航天控制仪器研究所 | A kind of function detecting method of rotary transformer electric bridge |
| CN110133392A (en) * | 2018-02-09 | 2019-08-16 | 上海蔚兰动力科技有限公司 | Test method and its associated test system |
| CN109739122A (en) * | 2018-12-10 | 2019-05-10 | 河北汉光重工有限责任公司 | A kind of half wave excitation fast lock phase method |
| CN113295086A (en) * | 2021-05-07 | 2021-08-24 | 恒大新能源汽车投资控股集团有限公司 | Precision testing system of rotary transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20141009 |
|
| EXPY | Termination of patent right or utility model |