CN105510619A - Motor rotational speed measurement device - Google Patents
Motor rotational speed measurement device Download PDFInfo
- Publication number
- CN105510619A CN105510619A CN201510836631.1A CN201510836631A CN105510619A CN 105510619 A CN105510619 A CN 105510619A CN 201510836631 A CN201510836631 A CN 201510836631A CN 105510619 A CN105510619 A CN 105510619A
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- Prior art keywords
- speed measurement
- measurement device
- motor
- motor speed
- signal
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
Abstract
The present invention discloses a motor rotational speed measurement device, which comprises a hall sensor used for measuring the rotational speed of a motor, generating a speed measurement pulse and then sending the speed measurement pulse to a NAND gate; a timing unit used for outputting a high level within a preset period of time to the NAND gate; the NAND gate used for outputting a rotational speed signal to a counting unit according to the speed measurement pulse and the high level; the counting unit used for counting to obtain a counting result based on the rotational speed signal, and then decoding the counting result to obtain a decoded signal; and a nixie tube used for displaying the rotational speed of the motor according to the decoded signal. In this way, the motor rotational speed measurement device is simple in structure, convenient to operate and high in accuracy. compared with dedicated rotational speed measurement instruments in the prior art, the cost is greatly lowered.
Description
Technical field
The present invention relates to motor speed measurement technical field, particularly relate to a kind of motor speed measurement device.
Background technology
Motor as a kind of common actuating unit be employed more and more extensive, user needs when controlling motor and when judging the performance of motor to measure the rotating speed of motor, in prior art, the tachometer of measuring of existing much special measurement motor speed, but these instruments all also exist complex structure and expensive shortcoming.
Therefore, the motor speed measurement device how providing a kind of simple structure, cost low is the problem that those skilled in the art need to solve at present.
Summary of the invention
The object of this invention is to provide a kind of motor speed measurement device, structure is simple, compared with tachometer of measuring special in prior art, greatly reduces cost.
For solving the problems of the technologies described above, the invention provides a kind of motor speed measurement device, comprising:
Hall element, for measuring the rotating speed of motor, generating tachometer pulse, and described tachometer pulse is sent to Sheffer stroke gate;
Timing unit, is sent to described Sheffer stroke gate for exporting high level in predetermined period;
Described Sheffer stroke gate according to described tachometer pulse and described high level output tach signal to counting unit;
Described counting unit counts according to described tach signal, obtains count results, and carries out decoding to described count results, obtains decoded signal;
Charactron, for showing according to the rotating speed of described decoded signal to described motor.
Preferably, described timing unit specifically comprises:
Controlled multivibrator, for output low level in predetermined period to not gate;
Described not gate, anti-phasely obtains high level for carrying out described low level, and described high level is sent to described Sheffer stroke gate.
Preferably, described controlled multi-harmonic-oscillations implement body comprises:
CD4060 and the RC circuit be connected on outward on described CD4060 or crystal oscillating circuit.
Preferably, described RC circuit specifically comprises resistance R1, resistance R2, slide rheostat Rp and electric capacity C, wherein:
The first end of described resistance R1 is connected with the signal input pin of described CD4060, second end of described resistance R1 is connected with the first end of described slide rheostat Rp and the first end of described electric capacity C respectively, second end of described electric capacity C is connected with the signal forward output pin of described CD4060, second end of described slide rheostat Rp is connected with the first end of described resistance R2, and second end of described resistance R2 is connected with the signals reverse output pin of described CD4060.
Preferably, described predetermined period is T=1/f; Wherein, f is the oscillation frequency of described controlled multivibrator;
And
Preferably, described counting unit is specially CD4026.
Preferably, the number of described CD4026 is 2, then the number of corresponding described charactron is 2.
Preferably, described charactron is LED charactron.
The invention provides a kind of motor speed measurement device, comprise Hall element, for measuring the rotating speed of motor, generating tachometer pulse, and tachometer pulse is sent to Sheffer stroke gate; Timing unit, is sent to Sheffer stroke gate for exporting high level in predetermined period; Sheffer stroke gate foundation tachometer pulse and high level output tach signal are to counting unit; Counting unit counts according to tach signal, obtains count results, and carries out decoding to count results, obtain decoded signal; Charactron, for showing according to the rotating speed of decoded signal to motor.Visible, motor speed measurement apparatus structure provided by the invention is simple, easy to operate and accuracy is high, compared with tachometer of measuring special in prior art, greatly reduces cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in prior art and embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of motor speed measurement device provided by the invention;
Fig. 2 is the structural representation of another kind of motor speed measurement device provided by the invention;
Fig. 3 is the pinouts of a kind of CD4060 provided by the invention;
Fig. 4 is the pinouts of a kind of CD4026 provided by the invention;
Wherein, pin 1-12 frequency division exports; Pin 2-13 frequency division exports; Pin 3-14 frequency division exports; Pin 4-6 frequency division exports; Pin 5-5 frequency division exports; Pin 6-7 frequency division exports; Pin 8-Vss ground; Pin 9-signal forward exports; Pin 10-signals reverse exports; Pin 11-signal inputs; Pin 12-reset signal inputs; Pin 13-9 frequency division exports; Pin 14-8 frequency division exports; Pin 15-10 frequency division exports; Pin 1-V
dDpower supply.
Embodiment
Core of the present invention is to provide a kind of motor speed measurement device, and structure is simple, compared with tachometer of measuring special in prior art, greatly reduces cost.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of motor speed measurement device provided by the invention, and this device comprises:
Hall element 1, for measuring the rotating speed of motor, generating tachometer pulse, and tachometer pulse is sent to Sheffer stroke gate 2;
Be understandable that, Hall element 1 is a kind of relatively conventional magneto-dependent sensor, magneto-dependent sensor be utilize conductor, the magnetoelectric effect of semiconductor is made, and is a kind of sensor that field signal can be converted to electric signal.Detect field signal during the Main Function of magneto-dependent sensor, maximum advantage is Poul Dorset Sheep, namely does not need between magneto-dependent sensor with object to be detected directly to contact just can obtain corresponding feedback signal.So just can measure motor speed very easily, thus send tachometer pulse to counter and count.
Hall element 1 is integrated with the multiple circuit such as mu balanced circuit, amplifying circuit, trigger circuit and driving circuit, there is the advantages such as volume is little, function is many, easy to install and sturdy and durable, contactless Rotating speed measring can be carried out to the motor of High Rotation Speed very easily by Hall element 1, produce tachometer pulse, and tachometer pulse is given next stage Fundamental Digital Circuit and process.
Timing unit 3, is sent to Sheffer stroke gate 2 for exporting high level in predetermined period;
Sheffer stroke gate 2 according to tachometer pulse and high level output tach signal to counting unit 4;
Counting unit 4 counts according to tach signal, obtains count results, and carries out decoding to count results, obtains decoded signal;
Charactron 5, for showing according to the rotating speed of decoded signal to motor.
The invention provides a kind of motor speed measurement device, comprise Hall element, for measuring the rotating speed of motor, generating tachometer pulse, and tachometer pulse is sent to Sheffer stroke gate; Timing unit, is sent to Sheffer stroke gate for exporting high level in predetermined period; Sheffer stroke gate foundation tachometer pulse and high level output tach signal are to counting unit; Counting unit counts according to tach signal, obtains count results, and carries out decoding to count results, obtain decoded signal; Charactron, for showing according to the rotating speed of decoded signal to motor.Visible, motor speed measurement apparatus structure provided by the invention is simple, easy to operate and accuracy is high, compared with tachometer of measuring special in prior art, greatly reduces cost.
Embodiment two
Please refer to Fig. 2, Fig. 2 is the structural representation of another kind of motor speed measurement device provided by the invention, and this device is on the basis of embodiment one:
As preferably, timing unit 3 specifically comprises:
Controlled multivibrator, for output low level in predetermined period to not gate 2;
Not gate 31, anti-phasely obtains high level for carrying out low level, and high level is sent to Sheffer stroke gate 2.
As preferably, controlled multi-harmonic-oscillations implement body comprises:
CD406032 and the RC circuit be connected on outward on CD406032 or crystal oscillating circuit.Particularly, please refer to Fig. 3, Fig. 3 is the pinouts of a kind of CD4060 provided by the invention.
Being understandable that, to testing the speed in the control of unit interval, can achieving the goal by selecting CD406032.CD406032 is the binary system serial counter of 14 grades, and its inside comprises oscillatory circuit, only needs external RC circuit or crystal oscillating circuit just can form controlled multi-harmonic-oscillations.
In addition, CD406032 also comprises reset switch S, for resetting to CD406032.The first end of reset switch S is connected with Vss ground pin 8, and second end of reset switch S is connected with reset signal input end 12 by resistance R3.
As preferably, RC circuit specifically comprises resistance R1, resistance R2, slide rheostat Rp and electric capacity C, wherein:
The first end of resistance R1 is connected with the signal input pin 11 of CD406032, second end of resistance R1 is connected with the first end of slide rheostat Rp and the first end of electric capacity C respectively, second end of electric capacity C is connected with the signal forward output pin 9 of CD406032, second end of slide rheostat Rp is connected with the first end of resistance R2, and second end of resistance R2 is connected with the signals reverse output pin 10 of CD406032.As preferably, predetermined period is T=1/f; Wherein, f is the oscillation frequency of controlled multivibrator;
And
In oscillatory circuit, have Q4-Q14 output pin, divide ratio is followed successively by 2
4, 2
5..., 2
14, maximal value is 2
14=16384.When the negative edge counter of CP1 (and CP0) is with binary counting, time clock line use this schmitt trigger can not limit the rising and falling time of clock.In addition, by regulating the slide rheostat in RC circuit, obtain required resistance, make the frequency that output frequency reaches required, also be oscillation frequency, also just obtain required predetermined period, thus control counter obtains the revolution of the motor in one-period, i.e. the rotating speed of motor.
As preferably, counting unit 4 is specially CD402641.
As preferably, charactron 5 is LED charactron 51.
Certainly, charactron 5 here can also be the charactron of other types, and the present invention does not do special restriction at this.
Please refer to Fig. 4, Fig. 4 is the pinouts of a kind of CD4026 provided by the invention.
CD402641 chip has decade counter function and has seven sections of decoding functions.Under normal circumstances, CD402641 is for the display of common cathode seven sections of LED charactrons provides input signal under the effect of CP pulse.Signal due to CD402641 output terminal is regular governed, so, carry pulse signal and carry reset signal can be obtained after suitable reasonable feedback, so just can realize the clocking capability of digital clock.Meanwhile, CD402641 also has the function of display decoding, the decade counter of counter can be converted to seven show codes that driving LED charactron 51 shows, eliminate special display decoder.The output pin abcdefg of CD402641 is directly connected with LED charactron 51, and the CR of CD402641 is asynchronous resetting end, as CR=1, will make counter O reset immediately.This makes it possible to very like a cork the data obtained carried out counting and be presented on LED charactron 51, just can obtain the rotating speed of current motor by reading LED charactron 51.
Specific works process below with regard to motor speed measurement device is described:
Regulate the contact of slide rheostat Rp, draw desired resistance, the frequency (=oscillation frequency/16384) that 3 pin are exported is f=1/60Hz, and namely predetermined period is T=60s.Before starting counting, click reset switch S, object allows circuit all reset.Start counting after reset, when Counts does not reach the fixed time, the 3 pin meeting output low levels 0 of CD406032, obtain high level after not gate 31 is anti-phase.The tachometer pulse output speed signal that Sheffer stroke gate 2 exports according to high level and Hall element 1, and tach signal is sent to CD402641 start counting, CD402641 is with decoding function and display driver function, can count according to tach signal, obtain count results, and decoding is carried out to count results, obtain decoded signal.And decoded signal is also by Direct driver light emitting semiconductor device---LED charactron 51 demonstrates numeral.When counter is to the fixed time, 3 pin of CD406032 just can export high level 1, and anti-phase is after low level 1, and Sheffer stroke gate 2 exports high level, and CD402641 counting will stop.Now, the numeral that LED charactron 51 shows is rotating speed at that time, reaches the object tested the speed.
In addition, if want again to count, only need again to allow circuit reset by a reset switch S; If want the figure place increasing display numeral, the number of the module of CD402641 and the number of corresponding charactron 5 so just can be increased after the same method, to increase digit.
As preferably, the number of CD402641 is 2, then the number of corresponding charactron 5 is 2.
Certainly, the present invention does not do special restriction for the number of CD402641 and charactron 5, determines according to actual conditions.
Carry out contactless testing the speed by the rotor of the motor of Hall element 1 pair of High Rotation Speed like this, directly send the tachometer pulse of collection to CD402641 and count.CD406032 chip, to by regulating RC circuit to obtain the oscillation frequency of specifying, namely obtains the predetermined period of specifying, thus enters to control to the time of testing the speed.In predetermined period, several CD402641 chip counts the pulse that Hall element 1 exports, and by its direct decoding, and be presented on charactron 5, several IC chip can be selected according to the actual needs just can to measure larger rotating speed by the mode of series connection.
The invention provides a kind of motor speed measurement device, comprise Hall element, for measuring the rotating speed of motor, generating tachometer pulse, and tachometer pulse is sent to Sheffer stroke gate; Timing unit, is sent to Sheffer stroke gate for exporting high level in predetermined period; Sheffer stroke gate foundation tachometer pulse and high level output tach signal are to counting unit; Counting unit counts according to tach signal, obtains count results, and carries out decoding to count results, obtain decoded signal; Charactron, for showing according to the rotating speed of decoded signal to motor.Visible, motor speed measurement apparatus structure provided by the invention is simple, compared with tachometer of measuring special in prior art, eliminates a large amount of manpower and materials, improves the efficiency of work.Circuit design is very simple, and the accuracy tested the speed is very high, can carry out real-time monitoring to measurement data, and it is more convenient to operate.The needs of higher speed can be met according to the actual needs tested the speed by increasing IC chip, greatly reducing cost.
It should be noted that, in this manual, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a motor speed measurement device, is characterized in that, comprising:
Hall element, for measuring the rotating speed of motor, generating tachometer pulse, and described tachometer pulse is sent to Sheffer stroke gate;
Timing unit, is sent to described Sheffer stroke gate for exporting high level in predetermined period;
Described Sheffer stroke gate according to described tachometer pulse and described high level output tach signal to counting unit;
Described counting unit counts according to described tach signal, obtains count results, and carries out decoding to described count results, obtains decoded signal;
Charactron, for showing according to the rotating speed of described decoded signal to described motor.
2. motor speed measurement device as claimed in claim 1, it is characterized in that, described timing unit specifically comprises:
Controlled multivibrator, for output low level in predetermined period to not gate;
Described not gate, anti-phasely obtains high level for carrying out described low level, and described high level is sent to described Sheffer stroke gate.
3. motor speed measurement device as claimed in claim 2, it is characterized in that, described controlled multi-harmonic-oscillations implement body comprises:
CD4060 and the RC circuit be connected on outward on described CD4060 or crystal oscillating circuit.
4. motor speed measurement device as claimed in claim 3, it is characterized in that, described RC circuit specifically comprises resistance R1, resistance R2, slide rheostat Rp and electric capacity C, wherein:
The first end of described resistance R1 is connected with the signal input pin of described CD4060, second end of described resistance R1 is connected with the first end of described slide rheostat Rp and the first end of described electric capacity C respectively, second end of described electric capacity C is connected with the signal forward output pin of described CD4060, second end of described slide rheostat Rp is connected with the first end of described resistance R2, and second end of described resistance R2 is connected with the signals reverse output pin of described CD4060.
5. motor speed measurement device as claimed in claim 4, it is characterized in that, described predetermined period is T=1/f; Wherein, f is the oscillation frequency of described controlled multivibrator;
And
6. motor speed measurement device as claimed in claim 1, it is characterized in that, described counting unit is specially CD4026.
7. motor speed measurement device as claimed in claim 6, it is characterized in that, the number of described CD4026 is 2, then the number of corresponding described charactron is 2.
8. motor speed measurement device as claimed in claim 1, it is characterized in that, described charactron is LED charactron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510836631.1A CN105510619A (en) | 2015-11-26 | 2015-11-26 | Motor rotational speed measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510836631.1A CN105510619A (en) | 2015-11-26 | 2015-11-26 | Motor rotational speed measurement device |
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| CN105510619A true CN105510619A (en) | 2016-04-20 |
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| CN201510836631.1A Pending CN105510619A (en) | 2015-11-26 | 2015-11-26 | Motor rotational speed measurement device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374916A (en) * | 2018-09-06 | 2019-02-22 | 芜湖职业技术学院 | A kind of low power consumption electric motor speed detector |
| CN110068700A (en) * | 2018-01-23 | 2019-07-30 | 埃佩多夫股份公司 | The method and apparatus of revolving speed for monitoring element |
| CN110736946A (en) * | 2018-07-19 | 2020-01-31 | Tdk-Micronas有限公司 | Hall sensor |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05188067A (en) * | 1992-01-14 | 1993-07-27 | Kobe Steel Ltd | Servo motor speed detecting device |
| JPH1164362A (en) * | 1997-08-27 | 1999-03-05 | Yazaki Corp | Vehicle speed displaying method, its device, and tachometer |
| US6219624B1 (en) * | 1998-08-03 | 2001-04-17 | Visteon Global Technologies, Inc. | Synchronous timer vehicle speed measurement |
| CN103472300A (en) * | 2013-09-11 | 2013-12-25 | 昆山新金福精密电子有限公司 | Simple digital frequency meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110068700A (en) * | 2018-01-23 | 2019-07-30 | 埃佩多夫股份公司 | The method and apparatus of revolving speed for monitoring element |
| CN110736946A (en) * | 2018-07-19 | 2020-01-31 | Tdk-Micronas有限公司 | Hall sensor |
| CN109374916A (en) * | 2018-09-06 | 2019-02-22 | 芜湖职业技术学院 | A kind of low power consumption electric motor speed detector |
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