CN207248912U - A kind of electro-motor rotation-speed measuring device - Google Patents
A kind of electro-motor rotation-speed measuring device Download PDFInfo
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- CN207248912U CN207248912U CN201720243818.5U CN201720243818U CN207248912U CN 207248912 U CN207248912 U CN 207248912U CN 201720243818 U CN201720243818 U CN 201720243818U CN 207248912 U CN207248912 U CN 207248912U
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Abstract
The utility model discloses a kind of electro-motor rotation-speed measuring device, including rotation speed detection unit, signal condition unit, central control unit, signal display unit, signal alarm unit, power circuit and signal translation interface unit, the signal input part of the rotation speed detection unit and the output terminal of motor connect, the signal output part of the rotation speed detection unit is connected with the input terminal of the signal condition unit, the output terminal of the signal condition unit is connected with the central control unit, the central control unit also respectively with the signal display unit, signal alarm unit is connected with signal translation interface unit.The utility model can measuring device can the quick, rotary speed stablizing, accurately measure motor, working condition during revolution can be reacted in time, do tachometric survey matching more preferable, to reduce the abrasion of motor.
Description
Technical field
It the utility model is related to motor rotary speed field of measuring technique, more particularly to a kind of electro-motor rotation-speed measuring device.
Background technology
Electro-motor (Electric motor), also known as motor or motor, refer to realize according to the law of electromagnetic induction
A kind of calutron that electric energy is changed or transmitted, for driving the electrical equipment of other devices.In industrial automation production, warp
Electro-motor rotating speed can be often detected, to find the abnormal conditions of electro-motor work in time, once failure omen
Corresponding measure is taken in time, huge economic losses caused by maintenance down can be avoided.At present, the measurement method of electro-motor be
Brush and commutator are installed on motor, then mix corresponding measuring circuit to realize, but due to the friction of brush and commutator, is increased
The viscous torque of tested motor is added, sensitivity is low, simultaneously because the discontinuous connection or bad contact of brush and commutator cause
Radio noise, produces electromagnetic interference, can directly influence the measurement accuracy of electro-motor, and the rotating speed for directly resulting in electro-motor is surveyed
Amount can not obtain effectively monitoring and ensure in process of production.
Utility model content
The purpose of this utility model is to provide a kind of electro-motor rotation-speed measuring device, measurement according to the present utility model
The rotary speed of motor can be stablized, be accurately measured to device, can react working condition during motor rotation in time, make rotating speed
Measurement matching is done more preferable, and to reduce the abrasion of motor, to achieve these goals, the utility model uses following technical side
Case：
According to the one side of this hair utility model, there is provided a kind of electro-motor rotation-speed measuring device, including rotating speed inspection
Survey unit, signal condition unit, central control unit, signal display unit, signal alarm unit, power circuit and signal conversion
Interface unit, the signal input part of the rotation speed detection unit and the output terminal of motor connect, the letter of the rotation speed detection unit
Number output terminal is connected with the input terminal of the signal condition unit, and the output terminal of the signal condition unit is controlled with the center
Unit connect, the central control unit also respectively with the signal display unit, signal alarm unit and signal translation interface
Unit connects, the output terminal of the power circuit respectively the power end with signal condition unit, central control unit power end,
The power end of signal display unit, the power end of signal alarm list current rectifying and wave filtering circuit member, the power supply of signal translation interface unit
End connection.
Preferably, the signal condition unit includes current rectifying and wave filtering circuit, signal partial pressure amplitude limiter circuit, signal compensation circuit
It is described whole and signal isolation circuit, the input terminal of the current rectifying and wave filtering circuit are connected with the output terminal of the rotation speed detection unit
The output terminal of stream filter circuit is connected with the input terminal of the signal partial pressure amplitude limiter circuit, the output of the signal partial pressure amplitude limiter circuit
End is connected with the input terminal of the signal compensation circuit, and the output terminal of the signal compensation circuit connects with the signal isolation circuit
Connect, the output terminal of the signal isolation circuit is connected with the digital counting input terminal of the central control unit, the power circuit
The power end with the signal compensation circuit, the power end of signal isolation circuit, the power end of central control unit are connected respectively.
Preferably, the current rectifying and wave filtering circuit includes rectifier diode D1, rectifier diode D2, rectifier diode D3, whole
Stream diode D4, resistance R1 and capacitance C1, the signal partial pressure amplitude limiter circuit include resistance R2, limiter diode D5 and amplitude limit two
Level pipe D6, the signal compensation circuit are put including resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C4 and computing
Big device U1, the signal isolation circuit include optical coupling isolator U2, resistance R7 and resistance R8；The output of the rotation speed detection unit
The anode with the rectifier diode D1, the cathode of rectifier diode D2 are connected first output terminal at end respectively, the rotating speed inspection
The anode with the rectifier diode D3, the cathode of rectifier diode D4 are connected second output terminal of survey unit respectively, described whole
The one end of the cathode, rectifier diode D3 cathodes of stream diode D1 respectively with the resistance R1 is connected, the other end of resistance R1
One end with the capacitance C1, one end of resistance R2 are connected respectively, the other end of the resistance R2 respectively with limiter diode
The anode of D5, the cathode of limiter diode D6, one end of capacitance C3, capacitance C4 one end connection, the other end of capacitance C4 with
One end connection of resistance R3, the other end of resistance R3 are connected with the negative input of the operational amplifier U1, the resistance R4
One end be connected with the electrode input end of the operational amplifier U1, one end of resistance R5, the output of the operational amplifier U1
End respectively the other end with resistance R5, one end of resistance R6, one end of resistance R7 be connected, the other end of resistance R6 with it is described
Potential circuit connects, and the other end of resistance R7 is connected with the anode of the optical coupling isolator U2, the collection of optical coupling isolator U2
One end with the resistance R8, the digital counting input terminal of central control unit are connected electrode respectively, the other end of resistance R8
It is connected with power circuit, the anode of the rectifier diode D2, rectifier diode D4 anodes, the cathode of limiter diode D5, limit
The anode of width diode D6, the other end of resistance R4, the other end of capacitance C1, the other end of capacitance C3, optical coupling isolator U2
Cathode, the emitter of optical coupling isolator U2 are connected to ground.
Preferably, for LM311 chips, the optical coupling isolator U2 is adopted the Amplifier Model that the operational amplifier U1 is used
Model 4N28 isolators.
Preferably, the central control unit uses processor of single chip computer, the model which uses
MSP430 series monolithics.
Preferably, the rotation speed detection unit is adopted mutual inductor and is detected, which uses current transformer or voltage
Mutual inductor.
The utility model employs above-mentioned technical proposal, and the utility model has following technique effect：
The measuring device of the utility model rapidly can measure motor rotary speed, when electric notor rotates, mutual inductor
Collection is subject to electric current caused by motor stator coil and exports acquisition and the directly proportional current signal of rotating speed, and to output
Current signal carry out shaping, filtering, amplification and compensation after export moderately good impulse waveform, in order to singlechip controller
Step-by-step counting is carried out, does tachometric survey matching more preferable, to reduce the abrasion of motor.The utility model high certainty of measurement,
Strong interference immunity, working stability, reliability are high, easy to use, highly practical, can save human resources, lower measurement cost,
So as to improve work efficiency
Brief description of the drawings
Fig. 1 is a kind of measuring principle figure of motor rotary speed measuring device of the utility model；
Fig. 2 is the conditioning functional block diagram of the signal condition unit of the utility model；
Fig. 3 is the circuit fundamental diagram of the signal condition unit of the utility model.
Embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, referring to the drawings and enumerate excellent
Embodiment is selected, the utility model is further described.However, it is necessary to illustrate, many details listed in specification
It is specific even without these just for the sake of making reader have a thorough explanation to the one or more aspects of the utility model
Details can also realize the utility model these aspect.
As shown in Figure 1, a kind of motor rotary speed measuring device according to the present utility model, including rotation speed detection unit, signal
Conditioning unit, central control unit, signal display unit, signal alarm unit, power circuit and signal translation interface unit, institute
The output terminal of the signal input part and motor of stating rotation speed detection unit connects, the signal output part of the rotation speed detection unit and institute
The input terminal connection of signal condition unit is stated, the output terminal of the signal condition unit is connected with the central control unit, institute
State central control unit to be also connected with the signal display unit, signal alarm unit and signal translation interface unit respectively, institute
Stating the output terminal of power circuit, the power end with signal condition unit, the power end of central control unit, signal display are single respectively
The power end connection of the power end of member, the power end of signal alarm list current rectifying and wave filtering circuit member, signal translation interface unit,；Institute
State central control unit and use processor of single chip computer, the model MSP430 series monolithics which uses.
As shown in Fig. 2, the signal condition unit includes current rectifying and wave filtering circuit, signal partial pressure amplitude limiter circuit, signal compensation
Circuit and signal isolation circuit, the input terminal of the current rectifying and wave filtering circuit are connected with the output terminal of the rotation speed detection unit, institute
The output terminal for stating current rectifying and wave filtering circuit is connected with the input terminal of the signal partial pressure amplitude limiter circuit, the signal partial pressure amplitude limiter circuit
Output terminal is connected with the input terminal of the signal compensation circuit, the output terminal of the signal compensation circuit and the signal isolation circuit
Connection, the output terminal of the signal isolation circuit are connected with the digital counting input terminal of the central control unit, the power supply electricity
The power end with the signal compensation circuit, the power end of signal isolation circuit, the power end of central control unit connect respectively on road
Connect.
As shown in figure 3, the current rectifying and wave filtering circuit include rectifier diode D1, rectifier diode D2, rectifier diode D3,
Rectifier diode D4, resistance R1 and capacitance C1, the signal partial pressure amplitude limiter circuit include resistance R2, limiter diode D5 and amplitude limit
Diode D6, the signal compensation circuit include resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C4 and computing
Amplifier U1, the signal isolation circuit include optical coupling isolator U2, resistance R7 and resistance R8；The rotation speed detection unit it is defeated
The anode with the rectifier diode D1, the cathode of rectifier diode D2 are connected first output terminal of outlet respectively, the rotating speed
The anode with the rectifier diode D3, the cathode of rectifier diode D4 are connected second output terminal of detection unit respectively, described
Rotation speed detection unit is adopted mutual inductor T1 and is detected, which uses current transformer or voltage transformer, current transformer
Or the primary coil of voltage transformer is connected in motor coil in stator current conducting wire, passes through the secondary coil of current transformer
Coupling output to current rectifying and wave filtering circuit, the utility model is specifically detected using current transformer, the rectifier diode D1
One end respectively with the resistance R1 of cathode, rectifier diode D3 cathodes be connected, the other end of resistance R1 respectively with it is described
One end of capacitance C1, one end connection of resistance R2, the other end of the resistance R2 anode with limiter diode D5, limit respectively
The cathode of width diode D6, one end connection of one end of capacitance C3, capacitance C4, the other end of capacitance C4 and one end of resistance R3
Connection, the other end of resistance R3 is connected with the negative input of the operational amplifier U1, one end of the resistance R4 with it is described
One end connection of the electrode input end of operational amplifier U1, resistance R5, the output terminal of the operational amplifier U1 respectively with resistance
The other end of R5, one end connection of one end of resistance R6, resistance R7, the other end of resistance R6 are connected with the potential circuit,
The other end of resistance R7 is connected with the anode of the optical coupling isolator U2, the collector of optical coupling isolator U2 respectively with it is described
One end of resistance R8, the digital counting input terminal connection of central control unit, the other end of resistance R8 are connected with power circuit,
Anode, rectifier diode D4 anodes, the cathode of limiter diode D5, the sun of limiter diode D6 of the rectifier diode D2
Pole, the other end of resistance R4, the other end of capacitance C1, the other end of capacitance C3, the cathode of optical coupling isolator U2, light-coupled isolation
The emitter of device U2 is connected to ground, and the voltage of power circuit output is respectively 12V and 5V, wherein, resistance R6 connection power supplys
The 12V voltages of circuit output, the 5V voltages of resistance R8 connections power circuit output, the amplifier that the operational amplifier U1 is used
Model LM311 chips, the model 4N28 isolators that the optical coupling isolator U2 is used.
The current signal produced when detecting motor rotation by current transformer on stator coil, couples the electric current of output
Tach signal is inputted to operational amplifier U1 progress amplitude limits and compensation row by shaping with filtering and then by coupled capacitor C4
Big processing, to prevent the signal of amplification is excessive from damaging device, amplitude limiting processing is carried out using limiter diode to the signal of amplification,
Then the comparison circuit that amplified signal is made up of LM311 amplification chips, resistance R4, resistance R5 and resistance R6 carries out partial pressure, two
Secondary amplitude limit and shaping, while signal compensation, iterative double clipping and the effect for arranging alternating voltage waveform are carried out to output signal, to defeated
Go out effective alternating voltage square wave, carry out isolation finally by optocoupler and level conversion exports the moderately good impulse waveforms of 0-5V,
Then the impulse waveform of output is sent into the digital counting input terminal INT0 of processor of single chip computer, in order to processor of single chip computer into
Row step-by-step counting, processor of single chip computer is obtained after count results and to count results into row decoding, so as to obtain decoded signal, is used
(shown using LCD liquid crystal display screen in being shown according to decoded signal to the rotating speed of motor, or turned by signaling interface
Unit is changed, for example, carrying out conversion output using serial ports or USB interface), pass through the motor speed measurement circuit of the utility model
Simple in structure, easy to operate and accuracy is high, easy to operate.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (4)
- A kind of 1. electro-motor rotation-speed measuring device, it is characterised in that：Including rotation speed detection unit, signal condition unit, center Control unit, signal display unit, signal alarm unit, power circuit and signal translation interface unit, the Rotating speed measring list The signal input part of member and the output terminal of motor connect, the signal output part of the rotation speed detection unit and the signal condition list The input terminal connection of member, the output terminal of the signal condition unit are connected with the central control unit, and the center control is single Member is also connected with the signal display unit, signal alarm unit and signal translation interface unit respectively, the power circuit Output terminal respectively the power end with signal condition unit, the power end of central control unit, signal display unit power end, letter Power end, the power end of signal translation interface unit of number single current rectifying and wave filtering circuit member of alarm connect；The signal condition unit Including current rectifying and wave filtering circuit, signal partial pressure amplitude limiter circuit, signal compensation circuit and signal isolation circuit, the current rectifying and wave filtering circuit Input terminal be connected with the output terminal of the rotation speed detection unit, the output terminal of the current rectifying and wave filtering circuit and the signal partial pressure The input terminal connection of amplitude limiter circuit, the output terminal of the signal partial pressure amplitude limiter circuit connect with the input terminal of the signal compensation circuit Connect, the output terminal of the signal compensation circuit is connected with the signal isolation circuit, the output terminal of the signal isolation circuit with it is described Central control unit digital counting input terminal connection, the power circuit respectively the power end with the signal compensation circuit, The power end connection of the power end, central control unit of signal isolation circuit.
- A kind of 2. electro-motor rotation-speed measuring device according to claim 1, it is characterised in that：The current rectifying and wave filtering circuit Including rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4, resistance R1 and capacitance C1, the letter Number partial pressure amplitude limiter circuit includes resistance R2, limiter diode D5 and limiter diode D6, and the signal compensation circuit includes resistance R3, resistance R4, resistance R5, resistance R6, capacitance C3, capacitance C4 and operational amplifier U1, the signal isolation circuit include optocoupler Isolator U2, resistance R7 and resistance R8；First output terminal of the output terminal of the rotation speed detection unit respectively with the rectification two The cathode connection of the anode of pole pipe D1, rectifier diode D2, the second output terminal of the rotation speed detection unit respectively with it is described whole The cathode connection of the anode, rectifier diode D4 of diode D3 is flowed, cathode, the rectifier diode D3 of the rectifier diode D1 is cloudy The one end of pole respectively with the resistance R1 is connected, the other end of the resistance R1 one end with the capacitance C1, resistance R2 respectively One end connects, the other end of the resistance R2 anode with limiter diode D5, the cathode of limiter diode D6, capacitance C3 respectively One end, capacitance C4 one end connection, the other end of capacitance C4 is connected with one end of resistance R3, the other end of resistance R3 and institute The negative input connection of operational amplifier U1 is stated, one end of the resistance R4 and the cathode of the operational amplifier U1 input End, one end connection of resistance R5, the output terminal of the operational amplifier U1 other end with resistance R5, the one of resistance R6 respectively End, one end connection of resistance R7, the other end of resistance R6 is connected with the power circuit, the other end of resistance R7 with it is described The anode connection of optical coupling isolator U2, collector one end with the resistance R8, the center control respectively of optical coupling isolator U2 The digital counting input terminal connection of unit, the other end of resistance R8 are connected with power circuit, the sun of the rectifier diode D2 Pole, rectifier diode D4 anodes, the cathode of limiter diode D5, the anode of limiter diode D6, the other end of resistance R4, capacitance The other end of C1, the other end of capacitance C3, the cathode of optical coupling isolator U2, the emitter of optical coupling isolator U2 are connected to ground.
- A kind of 3. electro-motor rotation-speed measuring device according to claim 2, it is characterised in that：The operational amplifier U1 The Amplifier Model used is LM311 chip, the model 4N28 isolators of the optical coupling isolator U2 uses.
- A kind of 4. electro-motor rotation-speed measuring device according to claim 1 or 2, it is characterised in that：The Rotating speed measring Unit is adopted mutual inductor and is detected, which uses current transformer or voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720243818.5U CN207248912U (en) | 2017-03-14 | 2017-03-14 | A kind of electro-motor rotation-speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720243818.5U CN207248912U (en) | 2017-03-14 | 2017-03-14 | A kind of electro-motor rotation-speed measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN207248912U true CN207248912U (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720243818.5U Expired - Fee Related CN207248912U (en) | 2017-03-14 | 2017-03-14 | A kind of electro-motor rotation-speed measuring device |
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| CN (1) | CN207248912U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578149A (en) * | 2018-12-10 | 2019-04-05 | 中国航发南方工业有限公司 | Speed signal conditioning circuit and electronic controller |
| CN112505395A (en) * | 2020-11-30 | 2021-03-16 | 贵州航天风华实业有限公司 | Alternating voltage and frequency detection system |
-
2017
- 2017-03-14 CN CN201720243818.5U patent/CN207248912U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578149A (en) * | 2018-12-10 | 2019-04-05 | 中国航发南方工业有限公司 | Speed signal conditioning circuit and electronic controller |
| CN112505395A (en) * | 2020-11-30 | 2021-03-16 | 贵州航天风华实业有限公司 | Alternating voltage and frequency detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180417 Termination date: 20190314 |