CN201331535Y - Speed characteristic detector for permanent-magnet linear motor operating mechanism of breaker - Google Patents
Speed characteristic detector for permanent-magnet linear motor operating mechanism of breaker Download PDFInfo
- Publication number
- CN201331535Y CN201331535Y CNU2008202321469U CN200820232146U CN201331535Y CN 201331535 Y CN201331535 Y CN 201331535Y CN U2008202321469 U CNU2008202321469 U CN U2008202321469U CN 200820232146 U CN200820232146 U CN 200820232146U CN 201331535 Y CN201331535 Y CN 201331535Y
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- linear motor
- magnet linear
- dsp chip
- permanent magnet
- circuit breaker
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- 230000033001 locomotion Effects 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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Abstract
本实用新型涉及断路器永磁直线电机操动机构的速度特性检测装置，该装置的结构为高压断路器的动触头连接绝缘拉杆，在绝缘拉杆和永磁直线电机的操纵杆上分别装配，光栅尺的输出端连接电平转换电路的输入端，电平转换电路的输出端连接DSP芯片，DSP芯片连接上位机。本实用新型装置的优点为通过高精度的光栅尺测得断路器的动触头和永磁直线电机的运动信号，通过电平转换电路和DSP芯片实现了对数据的计算处理，通过上位机PC显示，实现了高压断路器和永磁直线电机速度的在线检测，同时由于采用了高精度的光栅尺和DSP芯片，使得检测的结果更加实时、准确，并且其结构比较简单、可靠。
The utility model relates to a speed characteristic detection device of a permanent magnet linear motor operating mechanism of a circuit breaker. The structure of the device is that the moving contact of a high voltage circuit breaker is connected with an insulating pull rod, and the insulating pull rod and the operating rod of a permanent magnet linear motor are respectively assembled. The output end of the grating ruler is connected to the input end of the level conversion circuit, the output end of the level conversion circuit is connected to the DSP chip, and the DSP chip is connected to the upper computer. The advantage of the utility model device is that the motion signal of the moving contact of the circuit breaker and the permanent magnet linear motor is measured by a high-precision grating ruler, and the calculation and processing of the data is realized through the level conversion circuit and the DSP chip. It shows that the on-line detection of the speed of the high-voltage circuit breaker and the permanent magnet linear motor is realized. At the same time, due to the use of high-precision grating ruler and DSP chip, the detection result is more real-time and accurate, and its structure is relatively simple and reliable.
Description
Technical field
The speed characteristic detection device of a kind of breaker permanent magnet linear electric motor operation mechanism of the utility model is used for the velocity characteristic of measuring switch equipment at motion process.
Background technology
For isolating switch,, adopt conventional proving installation to be difficult to survey accurate Speed Characteristics for Vacuum Circuit Breaker parameter thus because its running time is shorter.The measurement of contact of breaker speed mainly is by measuring stroke, the time relationship of moving contact, then through calculating the speed parameter of moving contact.Adopt the additional contact method to measure branch, the closing speed of moving contact at the vacuum circuit breaker appearance initial stage.Measure the velocity characteristic of isolating switch at present, adopt optical displacement sensors to cooperate with corresponding metering circuit carries out more, commonly used have Rotary Optoelectrical Encoder of Incremental Type, grating chi sensor and have the swept resistance sensor of contact to measure the speed of vacuum circuit breaker, wherein the Rotary Optoelectrical Encoder of Incremental Type complex structure has the swept resistance sensor measurement precision of contact low.
Summary of the invention
The utility model designs a kind of isolating switch speed characteristic detection device at breaker permanent magnet linear electric motor operation mechanism.This pick-up unit is based on DSP, reach debugging, operation by device, can obtain speed, the stroke curve of moving contact of breaker speed, stroke curve and permanent magnet linear electric motor operation mechanism, finally realize high-precision moving contact of breaker speed real-time detection function.
The structure of this device connects insulated tension pole by the moving contact of isolating switch, on the operating rod of insulated tension pole and permanent-magnetism linear motor, be respectively fitted with the grating chi, the output terminal of grating chi connects the input end of level shifting circuit, breaking-closing operating by isolating switch, drive the insulated tension pole motion by the permanent magnet linear electric motor operation mechanism drivening rod, thereby make the grating chi produce relative motion, sensor on the grating chi is with the rectilinear motion conversion of signals of permanent-magnetism linear motor and the isolating switch coded pulse signal that is orthogonal, level shifting circuit receives the quadrature coding pulse signal, with the quadrature coding pulse conversion of signals of 5V is the quadrature coding pulse signal of the receivable 3.3V of DSP, realize the level conversion function, the output terminal of level shifting circuit connects dsp chip, and dsp chip connects host computer.
Advantage of the present utility model: record the moving contact of isolating switch and the motor message of permanent-magnetism linear motor by high-precision grating chi, realized computing to data showing then by host computer PC by level shifting circuit and dsp chip.Realized the online detection of isolating switch and permanent-magnetism linear motor speed, the while make that the result who detects is real-time more, accurate, and it is relatively simple for structure, reliable owing to adopted high-precision grating chi and dsp chip.
Description of drawings
Fig. 1 is the utility model contact of breaker speed kinetic characteristic detection system structural representation
Fig. 2 is the utility model dsp chip and grating chi hardware interface circuit;
Fig. 3 is the computing method process flow diagram of the utility model dsp chip image data.
Among Fig. 1: 1, the moving contact of isolating switch, 2, the grating chi, 3, insulated tension pole, 4, connecting rod, 5, operating rod, 6, permanent magnet linear electric motor operation mechanism, 7, level shifting circuit, 8, dsp chip, 9, host computer.
Embodiment
The maximum measuring speed of the grating that the utility model adopts is 4.8m/s, and pitch Δ s is 0.02mm.If sample frequency is chosen for 10000Hz, promptly the sampling period is 0.1ms.The orthogonal intersection code signal of grating chi 2 outputs is counted through the DSP quadruple, dsp chip 8 models of choosing are the TMS320LF2407A chip, level shifting circuit 7 is chosen high-speed bus transceiver SN74LVCH245A chip, the utility model moving contact 1 of isolating switch as depicted in figs. 1 and 2 connects insulated tension pole 3, on the operating rod 5 of insulated tension pole 3 and permanent-magnetism linear motor, be respectively fitted with grating chi 2, the output terminal of grating chi 2 connects the input end of high-speed bus transceiver SN74LVCH245A chip, breaking-closing operating by isolating switch, drive insulated tension pole 3 motions by permanent magnet linear electric motor operation mechanism 6 drivening rods 4, thereby make grating chi 2 produce relative motion, sensor on the grating chi 2 is with the rectilinear motion conversion of signals of permanent-magnetism linear motor and the isolating switch coded pulse signal that is orthogonal, the A1-A4 interface of high-speed bus transceiver SN74LVCH245A chip receives the quadrature coding pulse signal, realize the level conversion function by the high-speed bus transceiver, with the quadrature coding pulse conversion of signals of 5V is the quadrature coding pulse signal of the receivable 3.3V of dsp chip, and the output terminal of high-speed bus transceiver SN74LVCH245A chip is connected to the input pin QEP1 and the QEP2 (for the EVA module) of the quadrature coding pulse circuit of TMS320LF2407A chip.
The TMS320LF2407A chip is to the computing method of image data as shown in Figure 3 as follows:
The first step: interrupt inlet, keep the scene intact;
Second step: remove interrupt identification, read counter currency N
k, Δ N=N
k-N
0, give temporary variable temp, wherein N with Δ N assignment
k: the Counter Value of the k time sampling instant; N
0: the counter initial value;
The 3rd step: read motion flag register flg and whether equal 1, continue operation, jumped to for the 6th step if be not equal to 1 if equal 1;
The 4th step: whether temporary variable temp equals 0, if be not equal to 0 then continue operation, jumps to for the 9th step if equal 0;
The 5th step: motion begins, makes flag equal 1;
The 6th step: make Δ X=temp* Δ s, wherein pitch Δ s is 0.02mm;
The 7th the step: speed by formula v (k)=Δ x*0.05 can in the hope of;
The 8th step: (k) stores the data field into speed v;
The 9th step: reply on-the-spot;
The tenth step: return.
The TMS320LF2407A chip is passed to host computer 9 through serial communication interface with the data that calculate.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202321469U CN201331535Y (en) | 2008-12-26 | 2008-12-26 | Speed characteristic detector for permanent-magnet linear motor operating mechanism of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202321469U CN201331535Y (en) | 2008-12-26 | 2008-12-26 | Speed characteristic detector for permanent-magnet linear motor operating mechanism of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201331535Y true CN201331535Y (en) | 2009-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202321469U Expired - Fee Related CN201331535Y (en) | 2008-12-26 | 2008-12-26 | Speed characteristic detector for permanent-magnet linear motor operating mechanism of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201331535Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549021A (en) * | 2018-06-21 | 2018-09-18 | 沈阳工业大学 | A kind of experimental rig and method for the research of environment-friendly type gas arc extinction performance |
-
2008
- 2008-12-26 CN CNU2008202321469U patent/CN201331535Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549021A (en) * | 2018-06-21 | 2018-09-18 | 沈阳工业大学 | A kind of experimental rig and method for the research of environment-friendly type gas arc extinction performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20101226 |