CN203534605U - A ball grid converter - Google Patents
A ball grid converter Download PDFInfo
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- CN203534605U CN203534605U CN201320657728.2U CN201320657728U CN203534605U CN 203534605 U CN203534605 U CN 203534605U CN 201320657728 U CN201320657728 U CN 201320657728U CN 203534605 U CN203534605 U CN 203534605U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000005086 pumping Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000005284 excitation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a ball grid converter, and solves a problem that existing ball grid sensors can not be directly connected with a PLC, a numerical control system, a servo system, a computer, etc. The converter comprises a displacement processing unit and a converting circuit. The converting circuit comprises a differential signal converting unit and a single-ended signal converting unit. The displacement processing unit is provided with a QEI port. The displacement processing unit is separately connected with the differential signal conversion unit and the single-ended signal converting unit through the QEI port. The displacement processing unit is connected with a read head of the ball grid sensor through a ball grid signal control detection circuit. The ball grid converter of the utility model is advantageous in that: the ball grid converter can convert signals of the ball grid sensor into differential signals and single ended signals through the converting circuit and output the signals, so that connection of the common ball grid sensor with devices such as the PLC, the numerical control system and the servo system is realized, and support is provided for applications such as further displacement detection, industrial control and full-closed loop control.
Description
Technical field
The utility model relates to a kind of ball bar sensor, especially relates to a kind of ball bar converter that can connect digital control system, servo-drive system.
Background technology
Latest generation linear displacement transducer in the world at present during ball bar sensor, is applicable to the in-process measurement of various lathes.Ball bar sensor originates in as Britain, and it is to utilize the variation of magnetic conductive media amount to realize the conversion of electromagnetism/magnetoelectricity, and its structure includes sensor reading head and ball bar digital display meter.What at present common ball bar sensor was exported is phase modulation analog, cannot directly be connected with the equipment such as PLC, digital control system, servo-drive system and computing machine, so just cannot provide support for application such as further displacement detecting, Industry Control, closed-loop controls.
Summary of the invention
The utility model is mainly to solve existing ball bar sensor cannot directly be connected with PLC, digital control system, servo-drive system, computing machine etc., the problem that can not further provide support for application such as displacement detecting, Industry Control, closed-loop controls, provides a kind of ball bar converter that can connect digital control system, servo-drive system.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: ball bar converter includes displacement processing unit and displacement signal converted to the change-over circuit of difference or single-ended signal, described change-over circuit comprises differential signal converting unit and single-ended signal converting unit, displacement processing unit is provided with QEI port, displacement processing unit is connected with single-ended signal converting unit with differential signal converting unit respectively by QEI port, and displacement processing unit is connected in ball bar sensor read heads by ball bar signal controlling testing circuit.The utility model can by change-over circuit, convert the signal of ball bar sensor to differential signal and single-ended signal is exported, realized being connected of the equipment such as common ball bar sensor and PLC, digital control system, private dress system, for the application such as further displacement detecting, Industry Control, closed-loop control provide support.This displacement processing unit transmitted signal is controlled sensor read heads work, accept the signal that sensor read heads detects simultaneously, and by obtaining corresponding displacement signal after the computings such as digital phase detection, digital filtering, displacement processing unit sends differential signal converting unit and single-ended signal converting unit to after displacement signal being converted to the signal that QEI port is corresponding again, by conversion differential signal converting unit and single-ended signal converting unit, convert respectively differential signal and the single-ended signal needing to, realized the effect being connected with plurality of devices.
As a kind of preferred version, described differential signal converting unit includes differential signal change-over circuit and differential signal output connection port, this differential signal change-over circuit comprises a differential signal conversion chip, this chip adopts MC3487 chip, differential signal conversion chip includes three signal input part A that are connected with QEI port, signal input part B, signal input part R, and with 6 differential signal output terminals, be respectively differential signal output terminals A+, differential signal output terminals A-, differential signal output terminal B+, differential signal output terminal B-, differential signal output terminal R+, differential signal output terminal R-, the corresponding differential signal output terminals A of signal input part A+, differential signal output terminals A-, the corresponding differential signal output terminal of signal input part B B+, differential signal output terminal B-, the corresponding differential signal output terminal of signal input part R R+, differential signal output terminal R-, 6 each differential signal output terminals are all connected on signal differential signal output connection port.Displacement processing unit sends displacement information to differential signal converting unit by QEI port, differential signal converting unit converts A, the B of displacement processing unit QEI port, R signal to RS-422 differential signal, A corresponding A+, A-, B corresponding B+, B-, R corresponding R+, R-, RS-422 differential signal output, for connecting the equipment with difference input function, as the 8400D of Siemens, digital control system, the thunders such as 828 are matched intelligent DMC2210 motion control card.
As a kind of preferred version, described single-ended signal converting unit comprises single-ended signal change-over circuit and single-ended signal output connection port, single-ended signal change-over circuit comprises three triodes, the base stage of each triode is connected with the QEI port of displacement processing unit after by contact resistance, grounded emitter, collector is by connecting after fuse as a single-ended signal output terminal, three triodes connect respectively QEI port, and forming three single-ended signal output terminals, three single-ended signal output terminals are all connected to single-ended signal output connection port.Displacement processing unit sends displacement information to single-ended signal converting unit by QEI port, single-ended signal converting unit converts A, the B of displacement processing unit QEI port, R signal to A, B, the R signal of open collector (OC) output, realizes level output DC3-24V and the driving force of wide region.Open collector single-ended signal output is for connecing the equipment without differential signal input, as the PLC of Delta DVP16EH00T3 type etc.
As a kind of preferred version, described ball bar signal controlling testing circuit includes sinusoidal generation unit, pumping signal driver element, signal processing unit, displacement processing unit is connected with sinusoidal generation unit, sinusoidal generation unit is connected with pumping signal driver element, pumping signal unit is connected on sensor read heads input end, and sensor read heads output terminal is connected on displacement processing unit by connecting signal processing unit.Displacement processing unit produces the required 1KHz sinusoidal signal of pumping signal and the clk signal of 125KHz, is transformed into the sine wave signal of 1KHz, then after pumping signal driver element, sends to the excitation end of ball bar sensor read heads through sinusoidal generation unit.After sensor read heads work, export one with pumping signal with phase-modulated signal frequently, this signal is converted to by signal processing unit the digital signal that MCU can accept.
As a kind of preferred version, displacement processing unit is also provided with serial ports output port, on serial ports output port, be connected with level conversion unit, this level conversion unit comprises RS232 level shifting circuit and RS232 signal output connection port, RS232 level shifting circuit input end is connected with serial ports output port, and RS232 level shifting circuit output terminal is connected with RS232 signal output connection port.The output of RS-232 signal, for connecting the equipment of not being with QEI interface, as industrial computer, embedded system etc.
As a kind of preferred version, described displacement processing unit adopts STM32F103CBT6 chip, on this STM32F103CBT6 chip basis, by loading routine, is formed with QEI port, serial ports output port.
Therefore, the utility model has the advantages that: can by change-over circuit, convert the signal of ball bar sensor to differential signal and single-ended signal is exported, realized being connected of the equipment such as common ball bar sensor and PLC, digital control system, private dress system, for the application such as further displacement detecting, Industry Control, closed-loop control provide support.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of circuit structure frame diagram of the present utility model;
Accompanying drawing 2 is a kind of electrical block diagrams of displacement processing unit in the utility model;
Accompanying drawing 3 is a kind of electrical block diagrams of differential signal converting unit in the utility model;
Accompanying drawing 4 is a kind of electrical block diagrams of single-ended signal converting unit in the utility model;
Accompanying drawing 5 is a kind of electrical block diagrams of sinusoidal generation unit in the utility model;
Accompanying drawing 6 is a kind of electrical block diagrams of pumping signal driver element in the utility model;
Accompanying drawing 7 is a kind of electrical block diagrams of signal processing unit in the utility model;
Accompanying drawing 8 is a kind of electrical block diagrams of level conversion unit in the utility model.
The sinusoidal generation unit 3-of 1-displacement processing unit 2-pumping signal driver element 4-sensor read heads 5-signal processing unit 6-differential signal converting unit 7-single-ended signal converting unit 8-level conversion unit.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
A kind of ball bar converter of the present embodiment, as shown in Figure 1, include displacement processing unit 1, displacement processing unit is connected with ball bar sensor read heads 4 by ball bar signal controlling testing circuit, this displacement processing unit has QEI port and serial ports output port by internal processes design forming, displacement processing unit connects respectively differential signal converting unit 6 and single-ended signal converting unit 7 by QEI port, and serial ports output port connects level conversion unit 8.This ball bar signal controlling testing circuit includes sinusoidal generation unit 2, pumping signal driver element 3, signal processing unit 5, displacement processing unit is connected with sinusoidal generation unit input end, sinusoidal generation unit output terminal connects pumping signal driver element input end, pumping signal driver element output terminal connecting sensor read head input end, sensor read heads output terminal connects signal processing unit input end, and signal processing unit output terminal connects displacement processing unit.
As shown in Figure 2, this displacement processing unit adopts STM32F103CBT6 singlechip chip to form, this chip is formed with QEI port and serial ports output port by program design, this QEI port has three pin, the QEI-A end, QEI-B end, the QEI-R end that are respectively 17,18,19 pin, 21 and 22 pin of chip are respectively two ends of input and output of serial ports output port.On chip, also there are in addition 42 pin CLK signal ends, 32 pin 1KHz signal ends to ball bar signal controlling testing circuit transmitted signal, and 11 pin SIG-X ends of acknowledge(ment) signal.
Sinusoidal wave generation unit circuit as shown in Figure 5, mainly by MAX7427CUA+ chip and amplifier and form by capacitance resistance components and parts, this MAX7427CUA+ chip has IN pin, CLK pin, OUT pin, the CLK signal end of the chip of displacement processing unit is connected on CLK pin, 1KHz signal end is connected on IN pin after by contact resistance, OUT pin is connected on amplifier normal phase input end after connecting electric capacity, resistance, and amplifier out connects pumping signal driver element.As shown in Figure 6, adopt LM380N-8 chip to form, this LM380N-8 chip has INPUT+ pin, INPUT-pin, VOUT pin, INPUT+ pin ground connection, VOUT pin connecting sensor read head underexcitation coil electrode, INPUT ﹣ pin connecting sensor read head underexcitation coil negative pole, the amplifier out of pumping signal driver element circuit is also connected on INPUT ﹣ pin in addition.Signal processing circuit unit as shown in Figure 7, in figure, SIG-IN pin is input port, SIN-OUT pin is output port, the middle analog to digital conversion circuit being formed by resistance, electric capacity and two-stage amplifier, SIN-IN pin connecting sensor read head output terminal, SIN-OUT pin is connected to the SIG-X end on displacement processing unit chip.
Differential signal converting unit includes differential signal change-over circuit and differential signal output connection port, differential signal conversion unit circuit as shown in Figure 3, adopt MC3487 chip, this chip has three connectivity ports corresponding with QEI port on displacement processing unit chip, be respectively signal input part A, signal input part B, signal input part R, also there are 6 differential signal output terminals, be respectively differential signal output terminals A+, differential signal output terminals A-, differential signal output terminal B+, differential signal output terminal B-, differential signal output terminal R+, differential signal output terminal R-, the corresponding differential signal output terminals A of signal input part A+, differential signal output terminals A-, the corresponding differential signal output terminal of signal input part B B+, differential signal output terminal B-, the corresponding differential signal output terminal of signal input part R R+, differential signal output terminal R-, 6 differential signal output terminals are all connected on signal differential signal output connection port.
Single-ended signal converting unit comprises single-ended signal change-over circuit and single-ended signal output connection port, as shown in Figure 4, single-ended signal change-over circuit comprises three triodes, the base stage of each triode is connected with a pin of the QEI port of displacement processing unit after by contact resistance, three corresponding QEI-A ends of transistor base, QEI-B end, QEI-R end.Transistor emitter ground connection, collector is by connecting after fuse as a single-ended signal output terminal, three single-ended signal output terminals of three triodes, three single-ended signal output terminals are all connected on single-ended signal output connection port.
Level conversion unit comprises RS232 level shifting circuit and RS232 signal output connection port, as shown in Figure 8, RS232 level shifting circuit chip has 11,12 pin and is connected with 21,22 pin of displacement processing unit chip respectively, in addition RS232 level shifting circuit chip have 13,14 pin as output, input end is connected on RS232 signal output connection port.
During the work of the present embodiment ball bar converter, by displacement processing unit, produce the required 1KHz sinusoidal signal of pumping signal and the clk signal of 125KHz, through sinusoidal generation unit, be transformed into the sine wave signal of 1KHz, then after pumping signal driver element, send to the excitation end of ball bar sensor read heads.After sensor read heads work, export one with pumping signal with phase-modulated signal frequently, this signal is converted to by signal processing unit the digital signal that MCU can accept.Displacement processing unit is accepted the signal that sensor read heads detects, and by obtaining corresponding displacement signal after the computings such as digital phase detection, digital filtering, displacement processing unit sends differential signal converting unit and single-ended signal converting unit to after displacement signal being converted to the signal that QEI port is corresponding again, and converts the signal that serial ports output port is corresponding to and send pad converting unit to.By differential signal converting unit output RS-422 differential signal, by single-ended signal converting unit output open collector (OC) signal, by level conversion unit, export RS-232 signal.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although more used the terms such as displacement processing unit, sinusoidal generation unit, pumping signal driver element, sensor read heads herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.
Claims (6)
1. a ball bar converter, it is characterized in that: include displacement processing unit (1) and displacement signal is converted to the change-over circuit of difference or single-ended signal, described change-over circuit comprises differential signal converting unit (6) and single-ended signal converting unit (7), displacement processing unit is provided with QEI port, displacement processing unit is connected with single-ended signal converting unit (7) with differential signal converting unit (6) respectively by QEI port, and displacement processing unit is connected in ball bar sensor read heads (4) by ball bar signal controlling testing circuit.
2. ball bar converter according to claim 1, it is characterized in that described differential signal converting unit includes differential signal change-over circuit and differential signal output connection port, this differential signal change-over circuit comprises a differential signal conversion chip, this chip adopts MC3487 chip, differential signal conversion chip includes three signal input part A that are connected with QEI port, signal input part B, signal input part R, and with 6 differential signal output terminals, be respectively differential signal output terminals A+, differential signal output terminals A-, differential signal output terminal B+, differential signal output terminal B-, differential signal output terminal R+, differential signal output terminal R-, the corresponding differential signal output terminals A of signal input part A+, differential signal output terminals A-, the corresponding differential signal output terminal of signal input part B B+, differential signal output terminal B-, the corresponding differential signal output terminal of signal input part R R+, differential signal output terminal R-, 6 differential signal output terminals are all connected on signal differential signal output connection port.
3. ball bar converter according to claim 1, it is characterized in that described single-ended signal converting unit comprises single-ended signal change-over circuit and single-ended signal output connection port, single-ended signal change-over circuit comprises three triodes, the base stage of each triode is connected with the QEI port of displacement processing unit after by contact resistance, grounded emitter, collector is by connecting after fuse as a single-ended signal output terminal, three triodes connect respectively QEI port, and form three single-ended signal output terminals, three single-ended signal output terminals are all connected to single-ended signal output connection port.
4. according to the ball bar converter described in claim 1 or 2 or 3, it is characterized in that described ball bar signal controlling testing circuit includes sinusoidal generation unit (2), pumping signal driver element (3), signal processing unit (5), displacement processing unit is connected with sinusoidal generation unit, sinusoidal generation unit is connected with pumping signal driver element, pumping signal unit is connected on sensor read heads input end, and sensor read heads output terminal is connected on displacement processing unit by connecting signal processing unit.
5. according to the ball bar converter described in claim 1 or 2 or 3, it is characterized in that displacement processing unit is also provided with serial ports output port, on serial ports output port, be connected with level conversion unit, this level conversion unit comprises RS232 level shifting circuit and RS232 signal output connection port, RS232 level shifting circuit input end is connected with serial ports output port, and RS232 level shifting circuit output terminal is connected with RS232 signal output connection port.
6. according to the ball bar converter described in claim 1 or 2 or 3, it is characterized in that described displacement processing unit adopts STM32F103CBT6 chip, is formed with QEI port, serial ports output port by loading routine on this STM32F103CBT6 chip basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657728.2U CN203534605U (en) | 2013-10-23 | 2013-10-23 | A ball grid converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657728.2U CN203534605U (en) | 2013-10-23 | 2013-10-23 | A ball grid converter |
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| CN203534605U true CN203534605U (en) | 2014-04-09 |
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| CN201320657728.2U Expired - Lifetime CN203534605U (en) | 2013-10-23 | 2013-10-23 | A ball grid converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983282A (en) * | 2013-10-23 | 2014-08-13 | 杭州德普测量设备有限公司 | Spheric grid converter |
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2013
- 2013-10-23 CN CN201320657728.2U patent/CN203534605U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983282A (en) * | 2013-10-23 | 2014-08-13 | 杭州德普测量设备有限公司 | Spheric grid converter |
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