CN204374227U - For the signal acquisition circuit of motor speed test - Google Patents
For the signal acquisition circuit of motor speed test Download PDFInfo
- Publication number
- CN204374227U CN204374227U CN201520090404.4U CN201520090404U CN204374227U CN 204374227 U CN204374227 U CN 204374227U CN 201520090404 U CN201520090404 U CN 201520090404U CN 204374227 U CN204374227 U CN 204374227U
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- signal
- module
- motor speed
- acquisition circuit
- speed test
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Abstract
The utility model discloses a kind of signal acquisition circuit for motor speed test, its drip irrigation device comprises filtration module, carries out filtering to the signal that infrared probe sends; Clamper module, is coupled to filtration module, and carries out amplitude limit to signal; Amplification module, is coupled to clamper module, and amplifies to export amplifying signal to signal; Hysteresis comparator, receives amplifying signal and compares, itself and the threshold value of input on hysteresis comparator to export electric signal; Electric signal is sent to controller by photoelectric coupling module.The purpose of this utility model is to provide a kind of signal acquisition circuit for motor speed test having good in anti-interference performance.
Description
Technical field
The utility model relates to a kind of motor speed test circuit, and more particularly, it relates to a kind of signal acquisition circuit for motor speed test.
Background technology
Synchronous alternating-current generator is widely used in the power fields such as hydropower, thermal power generation, diesel generation, in recent years, along with the development of Power Electronic Technique, computer technology and Micro-control Technology, because TT&C system is constantly towards digital intelligent future development, therefore the control of rotating speed becomes the key link realized in industry measurement and control system.And the rotating speed how measuring motor controls one of outstanding problem becoming motor application with realization to the high precision of rotating speed.Rotating speed measurement method conventional at present has photoelectric code disk velocimetry etc.
The course of work of this photoelectric code disk velocimetry is: after utilizing infrared probe to carry out light-to-current inversion, form electric signal, and then a series of circuit module such as circuit, amplification circuit of electrical signal and trigger after filtering, finally arrive controller, and processed to the received signal by controller.But in this process, the transmission of signal can under environment, external electromagnetic ripple or the interference of sound wave, undesired signal can be produced, cause the instability that the transmission of signal can be suitable, namely add some undesired signals of mixing, so the signal that controller can be caused finally to receive is inaccurate, the existence of undesired signal simultaneously can have influence on the normal operation of a few thing circuit, even can damage some circuit components, therefore there is the space of improvement.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is the signal acquisition circuit for motor speed test providing a kind of good in anti-interference performance.
For achieving the above object, the utility model provides following technical scheme: a kind of signal acquisition circuit for motor speed test, comprises filtration module, carry out filtering to the signal that infrared probe sends; Clamper module, is coupled to filtration module, and carries out amplitude limit to signal; Amplification module, is coupled to clamper module, and amplifies to export amplifying signal to signal; Hysteresis comparator, receives amplifying signal and compares, itself and the threshold value of input on hysteresis comparator to export electric signal; Electric signal is sent to controller by photoelectric coupling module.
By adopting technique scheme, filtration module effectively can carry out preliminary filtering to the signal collected thus obtain signal comparatively stably, and then by this signal transmission to clamper module, by the intersity limitation of this signal in certain scope, further it is amplified for amplification module, and it is utilized, after hysteresis comparator receives this amplifying signal, amplifying signal and threshold value are compared, to export more stable electric signal, then this electric signal is sent to controller by photoelectric coupling module, make controller can receive this stable electric signal, process accurately, hysteresis comparator has been applied in this process, this hysteresis comparator introduces positive-feedback circuit on the basis of anti-phase input list threshold compataror, because the threshold value of the effect comparer of feedback can change with the change of output voltage, so its antijamming capability improves greatly, photoelectric coupling module has the effect of unidirectional conducted signal simultaneously, so prevent the backflow of electric signal, improves the electric coupling interference of security and reduction input/output terminal, thus makes controller can receive stable electric signal and process it.
The utility model is set to further: filtration module is RC filtering circuit, and the input end of RC filtering circuit receives the signal that infrared probe sends.
By adopting technique scheme, RC wave filter is the combination of simple resistance and electric capacity, so structure is comparatively simple, and effective.
The utility model is set to further: clamper module comprises parallel connected in reverse phase in RC filtering circuit first diode and the second diode, the negative pole of the first diode and the equal ground connection of positive pole of the second diode.
By adopting technique scheme, this is arranged so that the signal sent by infrared probe to be limited in bearing in working range of amplifier, thus amplifier is better worked.
The utility model is set to further: amplification module is amplifier, the in-phase input end of amplifier is connected between the positive pole of the first diode and the negative pole of the second diode, the inverting input of amplifier is connected with the output terminal of amplifier and is provided with feedback resistance, to form feedback circuit.
By adopting technique scheme, signal can effectively amplify by this amplifier.
The utility model is set to further: feedback resistance is parallel with the first electric capacity, and the node of the inverting input of the first electric capacity, feedback resistance and amplifier is connected with divider resistance, the other end ground connection of divider resistance.
By adopting technique scheme, on feedback resistance, the first electric capacity in parallel, further can play filter effect, the feedback signal obtained is carried out filtering, improves the stability of feedback signal.
The utility model is set to further: photoelectric coupling module includes photoelectrical coupler, for the transmission of electric signal; Power supply, is coupled to the positive pole of photoelectrical coupler; Triode, collector is coupled to the negative pole of photoelectrical coupler, and base stage is coupled to the output terminal of hysteresis comparator, grounded emitter.
By adopting technique scheme, the setting of photoelectrical coupler, achieves the single-phase transmission of electric signal, effectively prevents the backflow situation of electric signal, improves the stability that electric signal transmits further.
The utility model is set to further: be also connected with trigger between controller and photoelectrical coupler.
By adopt technique scheme, this trigger improves the utility model antijamming capability further, and electric signal transmit stability and security.
The utility model is set to further: the connected node of amplifier and hysteresis comparator is connected with the second electric capacity, the other end ground connection of described second electric capacity.
By adopting technique scheme, this second electric capacity further can play the effect of filtering.
Accompanying drawing explanation
Fig. 1 is the module frame chart of the signal acquisition circuit embodiment that the utility model is tested for motor speed;
Fig. 2 is the circuit diagram of the signal acquisition circuit embodiment that the utility model is tested for motor speed.
Reference numeral: 1, filtration module; 2, clamper module; 3, amplification module; 4, photoelectric coupling module.
Embodiment
With reference to accompanying drawing, the signal acquisition circuit embodiment that the utility model is used for motor speed test is described further.
As shown in Figure 1 and Figure 2, a kind of signal acquisition circuit for motor speed test, comprises filtration module 1, carries out filtering to the signal that infrared probe sends; Clamper module 2, is coupled to filtration module 1, and carries out amplitude limit to signal; Amplification module 3, is coupled to clamper module 2, and carries out amplification process to export amplifying signal to signal; Hysteresis comparator, responds with amplifying signal and compares, itself and the threshold value of input on hysteresis comparator to export stable electric signal; Photoelectric coupling module 4, to transmit the mode of electric signal by opto-electronic conversion in response to electric signal; Controller, response and electric signal, and electric signal is processed.
This RC filtering circuit includes two resistance R25 and R26, and two electric capacity C24 and C25, electric capacity C24 are connected between resistance R25 and R26, other end ground connection, and electric capacity C25 is connected to the output terminal of resistance R26, and the other end ground connection of electric capacity C25.
Clamper module 2 have two parallel connected in reverse phase the first diode D1 and the second diode D2, and be all connected in parallel on electric capacity C25, the negative pole of the first diode D1 and the equal ground connection of positive pole of the second diode D2.
Amplification module 3 includes an amplifier, the model of this amplifier is LM324, the in-phase input end of amplifier is coupled between the first diode D1 and the second diode D2, namely be coupled between the positive pole of the first diode D1 and the negative pole of the second diode D2, connect conducting between the inverting input of amplifier and the output terminal of amplifier and be provided with feedback resistance R1 instrument formation feedback circuit.Simultaneously feedback resistance R1 is parallel with the first electric capacity C1, the first electric capacity C1, connected node between feedback resistance R1 and the inverting input of amplifier are connected with divider resistance R2, the other end ground connection of divider resistance R2.
The inverting input of hysteresis comparator is coupled to the output terminal of amplification module 3, the node between amplification module 3 and hysteresis comparator is connected with the second electric capacity C2, the other end ground connection of this second electric capacity C2.The amplifier applied in this hysteresis comparator is similarly LM324.
Photoelectric coupling module 4 includes a photoelectrical coupler and is arranged on power supply and the triode of photoelectrical coupler periphery, the model of this photoelectrical coupler is TLP521-1, power supply is 5V and is connected to the positive pole of photoelectrical coupler, the collector of triode is connected on the negative pole of photoelectrical coupler, the base stage of triode is coupled to the output terminal of hysteresis comparator, the grounded emitter of triode, the collector of photoelectrical coupler is connected to trigger, the model of this trigger is CD4093, the emitter base of photoelectrical coupler, by trigger, electric signal is sent to controller, last controller receives stable electric signal, and make and processing accurately.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1., for a signal acquisition circuit for motor speed test, it is characterized in that: comprise
Filtration module, carries out filtering to the signal that infrared probe sends;
Clamper module, is coupled to filtration module, and carries out amplitude limit to signal;
Amplification module, is coupled to clamper module, and amplifies to export amplifying signal to signal;
Hysteresis comparator, receives amplifying signal and compares, itself and the threshold value of input on hysteresis comparator to export electric signal;
Described electric signal is sent to controller by photoelectric coupling module.
2. the signal acquisition circuit for motor speed test according to claim 1, is characterized in that: described filtration module is
RC filtering circuit, the input end of RC filtering circuit receives the signal that infrared probe sends.
3. the signal acquisition circuit for motor speed test according to claim 2, is characterized in that: described clamper module comprises
Parallel connected in reverse phase in RC filtering circuit first diode and the second diode, the negative pole of described first diode and the equal ground connection of positive pole of the second diode.
4. the signal acquisition circuit for motor speed test according to claim 3, is characterized in that: described amplification module is
Amplifier, the in-phase input end of amplifier is connected between the positive pole of the first diode and the negative pole of the second diode, and the inverting input of amplifier is connected with the output terminal of amplifier and is provided with feedback resistance, to form feedback circuit.
5. the signal acquisition circuit for motor speed test according to claim 4, it is characterized in that: described feedback resistance is parallel with the first electric capacity, the node of the inverting input of described first electric capacity, feedback resistance and amplifier is connected with divider resistance, the other end ground connection of described divider resistance.
6. the signal acquisition circuit for motor speed test according to claim 5, is characterized in that: described photoelectric coupling module includes
Photoelectrical coupler, for the transmission of electric signal;
Power supply, is coupled to the positive pole of photoelectrical coupler;
Triode, collector is coupled to the negative pole of photoelectrical coupler, and base stage is coupled to the output terminal of hysteresis comparator, grounded emitter.
7. the signal acquisition circuit for motor speed test according to claim 6, is characterized in that: be also connected with trigger between described controller and photoelectrical coupler.
8. the signal acquisition circuit for motor speed test according to claim 7, is characterized in that: the connected node of described amplifier and hysteresis comparator is connected with the second electric capacity, the other end ground connection of described second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520090404.4U CN204374227U (en) | 2015-02-07 | 2015-02-07 | For the signal acquisition circuit of motor speed test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520090404.4U CN204374227U (en) | 2015-02-07 | 2015-02-07 | For the signal acquisition circuit of motor speed test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204374227U true CN204374227U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520090404.4U Active CN204374227U (en) | 2015-02-07 | 2015-02-07 | For the signal acquisition circuit of motor speed test |
Country Status (1)
| Country | Link |
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| CN (1) | CN204374227U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465417A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | Steamer remote signal emitter |
| CN108128211A (en) * | 2016-12-01 | 2018-06-08 | 上海汽车集团股份有限公司 | New-energy automobile and its Motor torque determine method, apparatus and motor |
| CN113391085A (en) * | 2021-06-16 | 2021-09-14 | 沧州市科技创业中心 | Sensor output filter device |
-
2015
- 2015-02-07 CN CN201520090404.4U patent/CN204374227U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108128211A (en) * | 2016-12-01 | 2018-06-08 | 上海汽车集团股份有限公司 | New-energy automobile and its Motor torque determine method, apparatus and motor |
| CN107465417A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | Steamer remote signal emitter |
| CN113391085A (en) * | 2021-06-16 | 2021-09-14 | 沧州市科技创业中心 | Sensor output filter device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |