CN105181994A - Method and system for detecting rotating speed of direct current motor - Google Patents
Method and system for detecting rotating speed of direct current motor Download PDFInfo
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- CN105181994A CN105181994A CN201510673379.7A CN201510673379A CN105181994A CN 105181994 A CN105181994 A CN 105181994A CN 201510673379 A CN201510673379 A CN 201510673379A CN 105181994 A CN105181994 A CN 105181994A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
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Abstract
The invention discloses a method for detecting the rotating speed of a direct current motor, which comprises the following steps: collecting the rotating speed of a direct current motor; converting the rotating speed into an alternating current sinusoidal voltage signal; amplifying the voltage amplitude of the alternating current sinusoidal voltage signal to generate a high-voltage alternating current sinusoidal signal; acquiring index parameters of the high-voltage alternating current sinusoidal signal; and calculating the real rotating speed value of the direct current motor according to the index parameter. The invention amplifies the collected alternating current sinusoidal voltage signal, solves the problem that the low-voltage pulse signal is easily interfered by external electromagnetic interference in the prior art, and leads the detected result to be more accurate. The invention also discloses a system for detecting the rotating speed of the direct current motor.
Description
Technical field
The present invention relates to DC motor technology field, particularly relate to a kind of Rotating speed measring method and system of direct current generator.
Background technology
At present, for the detection of DC motor speed in air-conditioning, mainly by gathering the low voltage pulse information of direct current generator, carried out the judgement of rotating speed by the number of pulses detecting low voltage pulse in the unit interval.But existing this detection method, because low voltage pulse signal easily receives extraneous electromagnetic interference (EMI), therefore can make testing result inaccurate.
Summary of the invention
The invention provides a kind of Rotating speed measring method of direct current generator, extraneous electromagnetic interference (EMI) can be avoided, make testing result more accurate.
The invention provides a kind of Rotating speed measring method of direct current generator, comprising:
Gather the rotating speed of direct current generator;
Described rotating speed is converted into AC sinusoidal voltage signal;
Amplify the voltage magnitude of described AC sinusoidal voltage signal, generate high voltage AC sine signal;
Gather the index parameter of described high voltage AC sine signal;
The actual revolution value of described direct current generator is calculated according to described index parameter.
Preferably, the rotating speed of described collection direct current generator is specially:
The rotating speed of direct current generator is gathered by Hall element.
Preferably, the voltage magnitude of the described AC sinusoidal voltage signal of described amplification, generates high voltage AC sine signal and is specially:
Amplified the voltage magnitude of described AC sinusoidal voltage signal by amplifier, generate high voltage AC sine signal.
Preferably, described index parameter comprises: the crest voltage of described high voltage AC sine signal and frequency.
Preferably, the described actual revolution value calculating described direct current generator according to described index parameter is specially:
Relational expression n=F (v, f) according to setting calculates the actual revolution value of described direct current generator, and wherein, n is the actual revolution value of direct current generator, and v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
A rotary speed detecting system for direct current generator, comprising:
First collecting unit, for gathering the rotating speed of direct current generator;
Converting unit, for being converted into AC sinusoidal voltage signal by described rotating speed;
Amplifying unit, for amplifying the voltage magnitude of described AC sinusoidal voltage signal, generates high voltage AC sine signal;
Second collecting unit, for gathering the index parameter of described high voltage AC sine signal;
Computing unit, for calculating the actual revolution value of described direct current generator according to described index parameter.
Preferably, described first collecting unit is Hall element, is gathered the rotating speed of direct current generator by described Hall element.
Preferably, described amplifying unit is amplifier, is amplified the voltage magnitude of described AC sinusoidal voltage signal by described amplifier, generates high voltage AC sine signal.
Preferably, described index parameter comprises: the crest voltage of described high voltage AC sine signal and frequency.
Preferably, described computing unit is used for, according to the relational expression n=F (v of setting, f) calculate the actual revolution value of described direct current generator, wherein, n is the actual revolution value of direct current generator, v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
From such scheme, the Rotating speed measring method of a kind of direct current generator provided by the invention, by gathering the rotating speed of direct current generator, and the rotating speed of collection is converted into AC sinusoidal voltage signal, the AC sinusoidal voltage signal obtained is amplified, gather the index parameter of the high voltage AC sine signal obtained after amplifying, calculate the tachometer value of direct current generator reality according to the index parameter collected.The AC sinusoidal voltage signal collected amplifies by the present invention, solves low voltage pulse signal in prior art and is easily subject to the problem of outside electromagnetic interference, makes the result that detects more accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art 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.
The process flow diagram of Fig. 1 a kind of Rotating speed measring method of direct current generator disclosed in the embodiment of the present invention;
The process flow diagram of Fig. 2 Rotating speed measring method of another kind of direct current generator disclosed in the embodiment of the present invention;
The structural representation of Fig. 3 a kind of rotary speed detecting system of direct current generator disclosed in the embodiment of the present invention;
The structural representation of Fig. 4 rotary speed detecting system of another kind of direct current generator disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only 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.
As shown in Figure 1, a kind of Rotating speed measring method of direct current generator disclosed in the embodiment of the present invention, comprising:
The rotating speed of S101, collection direct current generator;
When needing to detect the rotating speed of the direct current generator in air-conditioning, gather rotating speed during direct current generator work.The described rotating speed collected is the virtual rotating speed of direct current generator, is not namely the actual revolution of direct current generator.
S102, described rotating speed is converted into AC sinusoidal voltage signal;
For getting the actual revolution of direct current generator, tachometer value when being worked by the direct current generator collected is converted to AC sinusoidal voltage signal.
S103, amplify the voltage magnitude of described AC sinusoidal voltage signal, generate high voltage AC sine signal;
The voltage magnitude of AC sinusoidal voltage signal is amplified to default high voltage, generates high voltage AC sine signal.
S104, gather the index parameter of described high voltage AC sine signal;
To the feature of the high voltage AC sine signal obtained after amplification, namely index parameter gathers.
S105, calculate the actual revolution value of described direct current generator according to described index parameter.
According to the index parameter of the high voltage AC sine signal collected, calculate the real tachometer value of direct current generator.
In the above-described embodiments, by gathering the rotating speed of direct current generator, and the rotating speed of collection is converted into AC sinusoidal voltage signal, the AC sinusoidal voltage signal obtained is amplified, gather the index parameter of the high voltage AC sine signal obtained after amplifying, calculate the tachometer value of direct current generator reality according to the index parameter collected.The AC sinusoidal voltage signal collected amplifies by the present invention, solves low voltage pulse signal in prior art and is easily subject to the problem of outside electromagnetic interference, makes the result that detects more accurate.
As shown in Figure 2, the Rotating speed measring method of another kind of direct current generator disclosed in the embodiment of the present invention, comprising:
S201, gather the rotating speed of direct current generator by Hall element;
When needing to detect the rotating speed of the direct current generator in air-conditioning, gather rotating speed when direct current generator works by Hall element.The described rotating speed collected is the virtual rotating speed of direct current generator, is not namely the actual revolution of direct current generator.
S202, described rotating speed is converted into AC sinusoidal voltage signal;
The rotating speed of the direct current generator collected is sent to the master controller of direct current generator by Hall element, and the rotating speed of the direct current generator received is converted into AC sinusoidal voltage signal by the master controller of direct current generator.
S203, amplified the voltage magnitude of described AC sinusoidal voltage signal by amplifier, generate high voltage AC sine signal;
The master controller of direct current generator is sent to amplifier by transforming the AC sinusoidal voltage signal obtained, and the voltage magnitude of the AC sinusoidal voltage signal received is amplified to default high voltage by amplifier, generates high voltage AC sine signal.
S204, the crest voltage gathering described high voltage AC sine signal and frequency;
The high voltage AC sine signal obtained after amplification is sent to the master controller of air-conditioning by amplifier, and the primary controller of air-conditioning gathers the crest voltage of the high voltage AC sine signal received and frequency.
Relational expression n=F (the v of S205, foundation setting, f) calculate the actual revolution value of described direct current generator, wherein, n is the actual revolution value of direct current generator, v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
The master controller of air-conditioning is by the crest voltage of high voltage AC sine signal that collects and the frequency relational expression n=F (v according to setting, f) the actual revolution value of described direct current generator is calculated, wherein, n is the actual revolution value of direct current generator, v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
In the above-described embodiments, the rotating speed of direct current generator is gathered by Hall element, and by the master controller of direct current generator, the rotating speed of collection is converted into AC sinusoidal voltage signal, by amplifier, the AC sinusoidal voltage signal obtained is amplified, the index parameter of the high voltage AC sine signal obtained after being amplified by the master controller collection of air-conditioning, calculates the tachometer value of direct current generator reality according to the index parameter collected.The AC sinusoidal voltage signal collected amplifies by the present invention, solves low voltage pulse signal in prior art and is easily subject to the problem of outside electromagnetic interference, makes the result that detects more accurate.
As shown in Figure 3, a kind of rotary speed detecting system of direct current generator disclosed in the embodiment of the present invention, comprising:
First collecting unit 301, for gathering the rotating speed of direct current generator;
When needing to detect the rotating speed of the direct current generator in air-conditioning, gather rotating speed when direct current generator works by the first collecting unit 301.The described rotating speed collected is the virtual rotating speed of direct current generator, is not namely the actual revolution of direct current generator.
Converting unit 302, for being converted into AC sinusoidal voltage signal by described rotating speed;
For getting the actual revolution of direct current generator, the tachometer value during direct current generator work collected by the first collecting unit 301 by converting unit 302 is converted to AC sinusoidal voltage signal.
Amplifying unit 303, for amplifying the voltage magnitude of described AC sinusoidal voltage signal, generates high voltage AC sine signal;
By amplifying unit 303, the voltage magnitude of AC sinusoidal voltage signal is amplified to default high voltage, generates high voltage AC sine signal.
Second collecting unit 304, for gathering the index parameter of described high voltage AC sine signal;
The feature of the high voltage AC sine signal obtained after being amplified by the second collecting unit 304 pairs of amplifying units 303, namely index parameter gathers.
Computing unit 305, for calculating the actual revolution value of described direct current generator according to described index parameter.
The index parameter of the high voltage AC sine signal that computing unit 305 collects according to the second collecting unit 304, calculates the real tachometer value of direct current generator.
In the above-described embodiments, by gathering the rotating speed of direct current generator, and the rotating speed of collection is converted into AC sinusoidal voltage signal, the AC sinusoidal voltage signal obtained is amplified, gather the index parameter of the high voltage AC sine signal obtained after amplifying, calculate the tachometer value of direct current generator reality according to the index parameter collected.The AC sinusoidal voltage signal collected amplifies by the present invention, solves low voltage pulse signal in prior art and is easily subject to the problem of outside electromagnetic interference, makes the result that detects more accurate.
As shown in Figure 4, the rotary speed detecting system of another kind of direct current generator disclosed in the embodiment of the present invention, comprising:
Hall element 401, for gathering the rotating speed of direct current generator;
When needing to detect the rotating speed of the direct current generator in air-conditioning, gather rotating speed when direct current generator works by Hall element 401.The described rotating speed collected is the virtual rotating speed of direct current generator, is not namely the actual revolution of direct current generator.
Converting unit 402, for being converted into AC sinusoidal voltage signal by described rotating speed;
The rotating speed of the direct current generator collected is sent to the master controller of direct current generator by Hall element 401, and the rotating speed of the direct current generator received is converted into AC sinusoidal voltage signal by the converting unit 402 in the master controller of direct current generator.
Amplifier 403, for amplifying the voltage magnitude of described AC sinusoidal voltage signal, generates high voltage AC sine signal;
Converting unit 402 in the master controller of direct current generator is sent to amplifier 403 by transforming the AC sinusoidal voltage signal obtained, the voltage magnitude of the AC sinusoidal voltage signal received is amplified to default high voltage by amplifier 403, generates high voltage AC sine signal.
Second collecting unit 404, for gathering crest voltage and the frequency of described high voltage AC sine signal;
The high voltage AC sine signal obtained after amplification is sent to the master controller of air-conditioning by amplifier 403, and the second collecting unit 404 in the primary controller of air-conditioning gathers the crest voltage of the high voltage AC sine signal received and frequency.
Computing unit 405, for calculating the actual revolution value of described direct current generator according to the relational expression n=F (v, f) of setting, wherein, n is the actual revolution value of direct current generator, and v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
The crest voltage of the high voltage AC sine signal that the second collecting unit 404 collects by the computing unit 405 in the master controller of air-conditioning and frequency are according to the relational expression n=F (v set, f) the actual revolution value of described direct current generator is calculated, wherein, n is the actual revolution value of direct current generator, v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
In the above-described embodiments, the rotating speed of direct current generator is gathered by Hall element, and by the master controller of direct current generator, the rotating speed of collection is converted into AC sinusoidal voltage signal, by amplifier, the AC sinusoidal voltage signal obtained is amplified, the index parameter of the high voltage AC sine signal obtained after being amplified by the master controller collection of air-conditioning, calculates the tachometer value of direct current generator reality according to the index parameter collected.The AC sinusoidal voltage signal collected amplifies by the present invention, solves low voltage pulse signal in prior art and is easily subject to the problem of outside electromagnetic interference, makes the result that detects more accurate.
If the function described in the present embodiment method using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computing equipment read/write memory medium.Based on such understanding, the part of the part that the embodiment of the present invention contributes to prior art or this technical scheme can embody with the form of software product, this software product is stored in a storage medium, comprising some instructions in order to make a computing equipment (can be personal computer, server, mobile computing device or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment same or similar part mutually see.
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 (10)
1. a Rotating speed measring method for direct current generator, is characterized in that, comprising:
Gather the rotating speed of direct current generator;
Described rotating speed is converted into AC sinusoidal voltage signal;
Amplify the voltage magnitude of described AC sinusoidal voltage signal, generate high voltage AC sine signal;
Gather the index parameter of described high voltage AC sine signal;
The actual revolution value of described direct current generator is calculated according to described index parameter.
2. method according to claim 1, is characterized in that, the rotating speed of described collection direct current generator is specially:
The rotating speed of direct current generator is gathered by Hall element.
3. method according to claim 2, is characterized in that, the voltage magnitude of the described AC sinusoidal voltage signal of described amplification, generates high voltage AC sine signal and is specially:
Amplified the voltage magnitude of described AC sinusoidal voltage signal by amplifier, generate high voltage AC sine signal.
4. method according to claim 3, is characterized in that, described index parameter comprises: the crest voltage of described high voltage AC sine signal and frequency.
5. method according to claim 4, is characterized in that, the described actual revolution value calculating described direct current generator according to described index parameter is specially:
Relational expression n=F (v, f) according to setting calculates the actual revolution value of described direct current generator, and wherein, n is the actual revolution value of direct current generator, and v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
6. a rotary speed detecting system for direct current generator, is characterized in that, comprising:
First collecting unit, for gathering the rotating speed of direct current generator;
Converting unit, for being converted into AC sinusoidal voltage signal by described rotating speed;
Amplifying unit, for amplifying the voltage magnitude of described AC sinusoidal voltage signal, generates high voltage AC sine signal;
Second collecting unit, for gathering the index parameter of described high voltage AC sine signal;
Computing unit, for calculating the actual revolution value of described direct current generator according to described index parameter.
7. system according to claim 6, is characterized in that, described first collecting unit is Hall element, is gathered the rotating speed of direct current generator by described Hall element.
8. system according to claim 7, is characterized in that, described amplifying unit is amplifier, is amplified the voltage magnitude of described AC sinusoidal voltage signal by described amplifier, generates high voltage AC sine signal.
9. system according to claim 8, is characterized in that, described index parameter comprises: the crest voltage of described high voltage AC sine signal and frequency.
10. system according to claim 9, it is characterized in that, described computing unit is used for, according to the relational expression n=F (v of setting, f) calculate the actual revolution value of described direct current generator, wherein, n is the actual revolution value of direct current generator, v is the crest voltage of high voltage AC sine signal, and f is the frequency of high voltage AC sine signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510673379.7A CN105181994B (en) | 2015-10-13 | 2015-10-13 | Method and system for detecting rotating speed of direct current motor |
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| CN201510673379.7A CN105181994B (en) | 2015-10-13 | 2015-10-13 | Method and system for detecting rotating speed of direct current motor |
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| CN105181994A true CN105181994A (en) | 2015-12-23 |
| CN105181994B CN105181994B (en) | 2018-09-07 |
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