CN104698213A - Revolution meter for measuring revolving speed of electric fan - Google Patents
Revolution meter for measuring revolving speed of electric fan Download PDFInfo
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- CN104698213A CN104698213A CN201310653502.XA CN201310653502A CN104698213A CN 104698213 A CN104698213 A CN 104698213A CN 201310653502 A CN201310653502 A CN 201310653502A CN 104698213 A CN104698213 A CN 104698213A
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Abstract
The invention discloses a revolution meter for measuring the revolving speed of an electric fan. The revolution meter comprises a direct-current power source, a bulb, a microampere gauge outfit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, a second diode, a triode, a photosensitive triode and a transformer. The revolution meter has the advantages that according to the characteristics of the photosensitive triode, light rays not shielded by fan blades during revolution of a fan are irradiated to the photosensitive triode intermittently to form pulse potentials, the pulse potentials are differentiated by a differentiating circuit to form sharp pulses, and pulse signals are formed after diode rectification and finally sent to the microampere gauge outfit to achieve revolving speed measurement; the revolution meter is simple and convenient to operate, high in accuracy, simple in circuit structure, low in cost and beneficial to popularization and improvement and has few elements.
Description
Technical field
The present invention relates to a kind of electronics rotation-speed measuring device, particularly relating to a kind of tachometer gage for measuring retation speed of electric fan.
Background technology
Tachometer gage is one of instrument of machinery industry indispensability, is used for measuring the rotating speed of motor, linear velocity or frequency.Be usually used in the manufacturing industry such as motor, electric fan, papermaking, plastics, chemical fibre, washing machine, automobile, aircraft, steamer.In electric fan production run, convenient and comfortable when using for making people, corresponding speed governing test can be carried out, but, many tachometer gages for measuring electric fan wind speed are not easy to operate, accuracy is low, and circuit structure is complicated, element is many, cost is high, sensitivity is low, are difficult to universal and promote.
Summary of the invention
Object of the present invention is just to provide a kind of tachometer gage for measuring retation speed of electric fan to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes direct supply, bulb, microampere gauge outfit, first resistance is to the 6th resistance, first electric capacity is to the 3rd electric capacity, first diode, second diode, triode, phototriode and transformer, the positive pole of described direct supply is connected with the described first end of the 6th resistance and the first end of described bulb simultaneously, second end of described 6th resistance simultaneously with the first end of described 3rd electric capacity, the first end of described first resistance, the first end of described second resistance is connected with the first end of the primary coil of described transformer, the collector of described phototriode is connected with the first end of described first electric capacity and the second end of described first resistance simultaneously, second end of described first electric capacity is connected with the second end of described second resistance and the base stage of described triode simultaneously, the first end penetrating described 3rd resistance of level connection of described triode, the collector of described triode connects the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer connects the positive pole of described first diode, second end of the secondary coil of described transformer connects the positive pole of described second diode, the negative pole of described first diode simultaneously with the negative pole of described second diode, the first end of described 5th resistance is connected with the first end of described second electric capacity, second end of described second electric capacity is connected with the first end of described 4th resistance and the electrode input end of described microampere gauge outfit simultaneously, the negative input of described microampere gauge outfit simultaneously with the second end of described 4th resistance, described phototriode penetrate level, second end of described 3rd electric capacity, second end of described 3rd resistance, second end of described bulb and the second end ground connection of described 5th resistance.
Beneficial effect of the present invention is:
The present invention utilizes phototriode light sensitive characteristic, make not to be irradiated to discontinuously on phototriode by the light that fan blade blocks during fan turns to form pulse potential, spike pulse is formed after differentiating circuit differential, pulse signal is formed again after diode rectification, finally give a microampere gauge outfit and reach the object that tests the speed, and the present invention is easy and simple to handle, accuracy is high, circuit structure is simple, element is few, cost is low, is conducive to universal and improves.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes direct supply V, bulb HL, microampere gauge outfit PA, first resistance R1 is to the 6th resistance R6, first electric capacity C1 is to the 3rd electric capacity C3, first diode VD1, second diode VD2, triode VT, phototriode VTL and transformer T, the positive pole of direct supply V is connected with the first end of the 6th resistance R6 and the first end of bulb HL simultaneously, second end of the 6th resistance R6 simultaneously with the first end of the 3rd electric capacity C3, the first end of the first resistance R1, the first end of the second resistance R2 is connected with the first end of the primary coil of transformer T, the collector of phototriode VTL is connected with the first end of the first electric capacity C1 and second end of the first resistance R1 simultaneously, second end of the first electric capacity C1 is connected with second end of the second resistance R2 and the base stage of triode VT simultaneously, the first end penetrating level connection the 3rd resistance R3 of triode VT, second end of the primary coil of the collector connection transformer T of triode VT, the first end of the secondary coil of transformer T connects the positive pole of the first diode VD1, second end of the secondary coil of transformer T connects the positive pole of the second diode VD2, the negative pole of the first diode VD1 simultaneously with the negative pole of the second diode VD2, the first end of the 5th resistance R5 is connected with the first end of the second electric capacity C2, second end of the second electric capacity C2 is connected with the first end of the 4th resistance R4 and the electrode input end of microampere gauge outfit PA simultaneously, the negative input of microampere gauge outfit PA simultaneously with second end of the 4th resistance R4, phototriode VTL penetrates level, second end of the 3rd electric capacity C3, second end of the 3rd resistance R3, second end of bulb HL and the second end ground connection of the 5th resistance R5.
Principle of work of the present invention:
As shown in Figure 1: the rotating speed measuring electric fan with tachometer gage, fan blade F is placed between light source (bulb HL) and phototriode VTL, when light is covered by fan blade, light can not be irradiated on phototriode VTL, phototriode VTL is high-impedance state, after fan blade F turns over certain angle, light is irradiated to phototriode VTL from fan blade F gap, phototriode VTL conducting is low resistive state, when fan blade F ceaselessly rotates, often turn around, phototriode VTL is just subject to irradiating (general desk fan only has three blades) three times discontinuously, owing to being added with DC voltage at the two ends of the first resistance R1 and phototriode VTL series circuit, thus pulse potential will be formed along with light interrupted illuminating on the two poles of the earth of phototriode VTL, pulse potential is through the first resistance R1, after the differentiating circuit differential that second resistance R2 and the first electric capacity C1 forms, form a series of spike pulse, again through the first diode VD1, second diode VD2 rectification, obtain the pulse signal of two frequencys multiplication, exported by the second electric capacity C2, deliver to a microampere gauge outfit PA, rotating speed is indicated by the pointer of microampere gauge outfit PA, rotating speed is higher, otherwise needle deflection is larger ~ then less.
Claims (1)
1. one kind for measuring the tachometer gage of retation speed of electric fan, it is characterized in that: comprise direct supply, bulb, microampere gauge outfit, first resistance is to the 6th resistance, first electric capacity is to the 3rd electric capacity, first diode, second diode, triode, phototriode and transformer, the positive pole of described direct supply is connected with the described first end of the 6th resistance and the first end of described bulb simultaneously, second end of described 6th resistance simultaneously with the first end of described 3rd electric capacity, the first end of described first resistance, the first end of described second resistance is connected with the first end of the primary coil of described transformer, the collector of described phototriode is connected with the first end of described first electric capacity and the second end of described first resistance simultaneously, second end of described first electric capacity is connected with the second end of described second resistance and the base stage of described triode simultaneously, the first end penetrating described 3rd resistance of level connection of described triode, the collector of described triode connects the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer connects the positive pole of described first diode, second end of the secondary coil of described transformer connects the positive pole of described second diode, the negative pole of described first diode simultaneously with the negative pole of described second diode, the first end of described 5th resistance is connected with the first end of described second electric capacity, second end of described second electric capacity is connected with the first end of described 4th resistance and the electrode input end of described microampere gauge outfit simultaneously, the negative input of described microampere gauge outfit simultaneously with the second end of described 4th resistance, described phototriode penetrate level, second end of described 3rd electric capacity, second end of described 3rd resistance, second end of described bulb and the second end ground connection of described 5th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310653502.XA CN104698213A (en) | 2013-12-05 | 2013-12-05 | Revolution meter for measuring revolving speed of electric fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310653502.XA CN104698213A (en) | 2013-12-05 | 2013-12-05 | Revolution meter for measuring revolving speed of electric fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104698213A true CN104698213A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310653502.XA Pending CN104698213A (en) | 2013-12-05 | 2013-12-05 | Revolution meter for measuring revolving speed of electric fan |
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| Country | Link |
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| CN (1) | CN104698213A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226566A (en) * | 2018-04-04 | 2018-06-29 | 深圳鳍源科技有限公司 | A kind of Electrical Machinery Rotational Speed Testing System, method and storage medium |
| CN109061217A (en) * | 2018-08-01 | 2018-12-21 | 上海理工大学 | Two-wire system optoelectronic sensor for wind speed circuit |
-
2013
- 2013-12-05 CN CN201310653502.XA patent/CN104698213A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226566A (en) * | 2018-04-04 | 2018-06-29 | 深圳鳍源科技有限公司 | A kind of Electrical Machinery Rotational Speed Testing System, method and storage medium |
| CN109061217A (en) * | 2018-08-01 | 2018-12-21 | 上海理工大学 | Two-wire system optoelectronic sensor for wind speed circuit |
| CN109061217B (en) * | 2018-08-01 | 2021-03-02 | 上海理工大学 | Two-wire system photoelectric wind speed sensor circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |