CN202502102U - Circuit for detecting rotation speed of machine tool spindle - Google Patents
Circuit for detecting rotation speed of machine tool spindle Download PDFInfo
- Publication number
- CN202502102U CN202502102U CN2012200899409U CN201220089940U CN202502102U CN 202502102 U CN202502102 U CN 202502102U CN 2012200899409 U CN2012200899409 U CN 2012200899409U CN 201220089940 U CN201220089940 U CN 201220089940U CN 202502102 U CN202502102 U CN 202502102U
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- spindle
- rotation speed
- control module
- circuit
- photoelectrical coupler
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Abstract
The utility model discloses a circuit for detecting the rotation speed of a machine tool spindle, comprising a rotation speed sensing unit, a signal sorting circuit and a control unit which are orderly connected, wherein the rotation speed sensing unit is arranged beside the gear of the main tool spindle, when the teeth of the gear approach/move away from a sampling unit, low level/high level is output; the signal sorting circuit comprises a photoelectric coupler and a Schmitt trigger and is used for transmission signal isolation and level conversion and sending signals to the control unit; and the control unit is used for judging whether the spindle is started, measuring the rotation speed and controlling the detection of brake. The circuit disclosed by the utility model has the advantages that a sensor is arranged at the spindle gear in a transmission case to detect the rotation situation of the spindle in real time, and the real-time rotation speed of the spindle is displayed on a display panel so that the time for the spindle to stop rotating and braking can be accurately judged. The circuit provides accurate logic running and judgment evidences for a series of practical functions, such as soft starting, power-saving running, electronic braking and the like.
Description
Technical field
The utility model relates to a kind of testing circuit, relates in particular to a kind of machine spindle speed testing circuit.
Background technology
The main shaft of prior art rotates the measurement form: reduction of speed generating pulse detection (the flex point pulse when detecting the spindle motor brake); Whether this measurement form is simple, without the additional device of sensor installation and so on, but can only stop operating by the easy detection spindle motor, can not satisfy people's demand.
The utility model content
The purpose of the utility model is for machine tool a kind of speed of mainshaft testing circuit to be provided; This testing circuit can detect the speed of mainshaft in real time; And on charactron, show, for a series of utility functions such as soft start, power-saving running, electric brake provide accurate logic operation and judgment basis.
The utility model adopts following technical scheme to realize:
A kind of machine spindle speed testing circuit is characterized in that, this circuit comprises revolution speed sensing unit, signal conditioning circuit, the control module that links to each other successively, wherein:
Said revolution speed sensing unit is installed in by the gear of machine tool chief axis, when the toe joint of gear near/output low level/high level during away from this sampling unit;
Comprise photoelectrical coupler and Schmidt trigger in the said signal conditioning circuit, be used to isolate transmission signals and level conversion, send signal to control module;
Said control module is used to judge that startup, the running speed of main shaft are measured and brake detects control.
Further, also comprise a display unit, said display unit is connected with control module, is used for showing the speed of mainshaft in real time to the external world.
Further; Said revolution speed sensing unit is one near switch, comprises pull-up resistor and wire jumper, and said pull-up resistor one end links to each other with power supply; The other end links to each other with the input end of photoelectrical coupler; Said wire jumper is connected the input end of photoelectrical coupler and links to each other with signal wire near switch, and the Schmidt trigger in the said signal arrangement unit is made up of first resistance, second resistance, diode and triode, and said diode cathode is connected the output terminal of photoelectrical coupler; Negative pole is connected on the base stage of triode; One end of said first and second resistance is connected on the positive pole and negative pole of diode, other end ground connection, and said photoelectrical coupler connects positive supply through first biasing resistor; Said control module is a single-chip microcomputer, and the collector of said triode connects power supply through second biasing resistor and is connected the input I/O port of single-chip microcomputer.
Further, also comprise first and second filter capacitor, said first filter capacitor is connected across on the photoelectric coupler output end, and second filter capacitor is connected across between the collector and emitter of triode.
The useful technique effect that the utility model possesses is: a sensor is installed on the transmission case inner main axis gear; Detection main shaft rotation situation that can be real-time; And the real-time rotating speed that on display board, shows main shaft can be judged when main shaft stall accurately and stop brake.For a series of utility functions such as soft start, power-saving running, electric brake provide accurate logic operation and judgment basis.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model machine spindle speed testing circuit.
Fig. 2 is the circuit theory diagrams of the utility model machine spindle speed testing circuit.
Embodiment
Through facing the description of embodiment down; To help public understanding the utility model more; But can't be regarded as restriction by the concrete embodiment that the applicant is given to the utility model technical scheme, any definition to parts or technical characterictic change and/or to one-piece construction do form but not the conversion of essence all should be regarded as the protection domain that technical scheme limited of the utility model.
As shown in Figure 1; The machine spindle speed testing circuit comprises revolution speed sensing unit 1, conversion of signals/transmission unit 2, the control module 3 that links to each other successively; Rotating speed sampling unit 1 is installed in by the gear of main shaft; When the tooth of gear near in the revolution speed sensing unit 1 near switch the time, near low level of switch output; When the tooth of gear away from after, high level of sensor output.So; The main shaft rotation situation will be delivered to signal conditioning circuit with the form of pulse, comprises photoelectrical coupler and Schmidt trigger in the signal conditioning circuit, is used to isolate transmission signals and level conversion; Single-chip processor i/o port to control module sends signal; Control module is used to judge that startup, the running speed of main shaft are measured and brake detects control, and display unit is connected with control module, is used for showing the speed of mainshaft in real time to the external world.For a series of utility functions such as soft start, power-saving running, electric brake provide accurate logic operation and judgment basis.
As shown in Figure 2, be provided with near switch in the revolution speed sensing unit 1, also comprise pull-up resistor R23 in it; Resistance R 100 is a wire jumper, is used for the conversion of test format, and pull-up resistor R23 one end links to each other with power supply VCC; The other end links to each other with the input end of photoelectrical coupler U1, and said wire jumper is connected the input end of photoelectrical coupler and links to each other with signal wire near switch, and first resistance R 3, second resistance R 4, diode D6 and triode Q1 constitute a Schmidt trigger; The positive pole of diode D6 is connected the output terminal of photoelectrical coupler U1; Negative pole is connected on the base stage of triode Q1, and the end of first and second resistance R 3, R4 is connected on the positive pole and negative pole of diode D6, other end ground connection; The collector of triode Q1 connects positive supply through the second biasing resistor R25; And link to each other with the single-chip microcomputer of control module input I/O port, photoelectrical coupler U1 connects positive supply through pull-up resistor R24, and the first filter capacitor C27 is connected across on the output terminal of photoelectrical coupler U1; The second filter capacitor C28 is connected across between the collector and emitter of triode Q1, and two filter capacitors all are used for filtering induction clutter.The workflow of speed of mainshaft testing circuit is following:
Start-up course is judged: during startup, main shaft begins to rotate, and sensor is narrowed down by wide to the pulse width that main shaft rotates, and single-chip microcomputer detects this pulse, then is judged as main shaft and starts;
Running speed detects in real time: finish in start-up course; Sensor becomes constant to the pulse width that main shaft rotates; Single-chip microcomputer detects this pulse, then is judged as main shaft and gets into normal operation, begins then with unit interval sampling pulse number; Through calculating, on display board, show the speed of mainshaft in real time then.
Brake process is judged: during brake, main shaft reduces speed now, and sensor is progressively broadened by constant beginning to the pulse width that main shaft rotates, and single-chip microcomputer detects this pulse, then is judged as to begin brake; When pulse becomes constant high level (after the brake end; The tooth of mainshaft gear just in time leaves sensor) or become constant low level (after the brake end when pulse; The tooth of mainshaft gear is just in time near sensor), judge that then main shaft stops operating, brake process finishes.
Reduction of speed generating pulse detection (the flex point pulse when detecting the spindle motor brake): on hardware, connect CS1, CS2 signal, R23 and R100 are not installed.Brake process is judged: in the brake beginning; The brake electric current is connected; Spindle motor can induce a set of pulses, when spindle motor soon stops, having one group of flex point pulse; Through output Speed signal after isolating transmission, level conversion and wave shaping, the Speed signal is directly delivered to single-chip microcomputer through velocity checking circuits in this two group pulse; Single-chip microcomputer detects the Speed pulse in real time, finishes when detecting second group pulse, judges that then spindle motor will stop operating, and time-delay brake electric current finishes brake after the feeding time.
Workflow by above-mentioned speed of mainshaft testing circuit can be found out; The machine spindle speed testing circuit of the utility model can be real-time detection main shaft rotation situation; And the real-time rotating speed that on display board, shows main shaft; In when brake, can judge when main shaft stall accurately, and stop brake.
Certainly; The utility model can also have other various embodiments; Under the situation that does not deviate from the utility model spirit and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (4)
1. a machine spindle speed testing circuit is characterized in that, this circuit comprises revolution speed sensing unit, signal conditioning circuit, the control module that links to each other successively, wherein:
Said revolution speed sensing unit is installed in by the gear of machine tool chief axis, when the toe joint of gear near/output low level/high level during away from this sampling unit;
Comprise photoelectrical coupler and Schmidt trigger in the said signal conditioning circuit, be used to isolate transmission signals and level conversion, send signal to control module;
Said control module is used to judge that startup, the running speed of main shaft are measured and brake detects control.
2. machine spindle speed testing circuit according to claim 1 is characterized in that, also comprises a display unit, and said display unit is connected with control module, is used for showing the speed of mainshaft in real time to the external world.
3. machine spindle speed testing circuit according to claim 1 and 2 is characterized in that, said revolution speed sensing unit is one near switch; Comprise pull-up resistor and wire jumper; Said pull-up resistor one end links to each other with power supply, and the other end links to each other with the input end of photoelectrical coupler, and said wire jumper is connected the input end of photoelectrical coupler and links to each other with signal wire near switch; Schmidt trigger in the said signal arrangement unit is made up of first resistance, second resistance, diode and triode; Said diode cathode is connected the output terminal of photoelectrical coupler, and negative pole is connected on the base stage of triode, and an end of said first and second resistance is connected on the positive pole and negative pole of diode; Other end ground connection; Said photoelectrical coupler connects positive supply through first biasing resistor, and said control module is a single-chip microcomputer, and the collector of said triode connects power supply through second biasing resistor and is connected the input I/O port of single-chip microcomputer.
4. machine spindle speed testing circuit according to claim 3; It is characterized in that; Also comprise first and second filter capacitor, said first filter capacitor is connected across on the photoelectric coupler output end, and second filter capacitor is connected across between the collector and emitter of triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200899409U CN202502102U (en) | 2012-03-12 | 2012-03-12 | Circuit for detecting rotation speed of machine tool spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200899409U CN202502102U (en) | 2012-03-12 | 2012-03-12 | Circuit for detecting rotation speed of machine tool spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202502102U true CN202502102U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200899409U Expired - Fee Related CN202502102U (en) | 2012-03-12 | 2012-03-12 | Circuit for detecting rotation speed of machine tool spindle |
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| Country | Link |
|---|---|
| CN (1) | CN202502102U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407548A (en) * | 2014-11-27 | 2015-03-11 | 上海任重仪表电器有限公司 | Zero speed measuring control device for rotation machinery |
| CN104483893A (en) * | 2014-10-31 | 2015-04-01 | 濠玮电子科技（惠州）有限公司 | Remote monitoring device and system for machine tool |
| CN108983669A (en) * | 2018-08-06 | 2018-12-11 | 北方工业大学 | Intrinsic safety pilot circuit |
| CN109212252A (en) * | 2017-06-30 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of tach signal sampling processing circuit |
-
2012
- 2012-03-12 CN CN2012200899409U patent/CN202502102U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483893A (en) * | 2014-10-31 | 2015-04-01 | 濠玮电子科技（惠州）有限公司 | Remote monitoring device and system for machine tool |
| CN104483893B (en) * | 2014-10-31 | 2015-10-21 | 濠玮电子科技（惠州）有限公司 | Lathe long-distance monitorng device and system |
| CN104407548A (en) * | 2014-11-27 | 2015-03-11 | 上海任重仪表电器有限公司 | Zero speed measuring control device for rotation machinery |
| CN104407548B (en) * | 2014-11-27 | 2019-01-25 | 上海任重仪表电器有限公司 | Zero velocity measuring and controlling for rotating machinery |
| CN109212252A (en) * | 2017-06-30 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of tach signal sampling processing circuit |
| CN109212252B (en) * | 2017-06-30 | 2024-04-19 | 宇通客车股份有限公司 | Rotational speed signal sampling processing circuit |
| CN108983669A (en) * | 2018-08-06 | 2018-12-11 | 北方工业大学 | Intrinsic safety pilot circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20180312 |