CN204517772U - Rotating speed modulate circuit - Google Patents
Rotating speed modulate circuit Download PDFInfo
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- CN204517772U CN204517772U CN201520153649.7U CN201520153649U CN204517772U CN 204517772 U CN204517772 U CN 204517772U CN 201520153649 U CN201520153649 U CN 201520153649U CN 204517772 U CN204517772 U CN 204517772U
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Abstract
The utility model discloses a kind of rotating speed modulate circuit, comprise signal generating circuit and circuit for signal conditioning, circuit for signal conditioning comprises coarse tuning circuit and fine tuning circuit, coarse tuning circuit comprises variable input control circuit and discharge circuit, variable input control circuit is connected with discharge circuit, fine tuning circuit comprises digital regulation resistance and regulates chip, and coarse tuning circuit is connected with signal generating circuit with fine tuning circuit simultaneously.The coarse tuning circuit of rotating speed modulate circuit and the acting in conjunction of fine tuning circuit avoid the situation of Zero-cross comparator circuit error detection, substantially increase the operating efficiency of circuit.The utility model cost is lower, practical.
Description
Technical field
The utility model relates to electricity field, refers in particular to a kind of rotating speed modulate circuit.
Background technology
Existing conversion modulate circuit, general employing Zero-cross comparator electric circuit inspection and adjustment, easily produce the situation of error detection.China Patent Publication No. CN203231768U, publication date on October 9th, 2013, name is called the analysis of measurement errors and the design verification platform that disclose a kind of Conditioning Circuits of Sensor system in the utility model patent of " analysis of measurement errors of Conditioning Circuits of Sensor system and design verification platform ", comprise: the some grades of modulate circuits being respectively equipped with gain control end of connecting successively, wherein, the input of first order modulate circuit is respectively with sensor unit, for providing the signal circuit of zero input signal to be connected, each modulate circuit output is connected corresponding A/D unit respectively; What be connected with the gain control end of signal circuit, each AD unit, each modulate circuit respectively outputs signal for the modulate circuits at different levels calculated detected by each AD unit under zero input state, to find out the modulate circuit producing error, and the modulate circuit controlling not produce error carries out the MCU unit of corresponding gain compensation.Weak point is, this Platform Designing is comparatively complicated, and cost is higher.
Utility model content
The purpose of this utility model overcomes the defect that the detection of prior art medium speed modulate circuit and adjustment process easily produce error detection, provides a kind of and detect and rotating speed modulate circuit that adjustment process accuracy is higher.
The purpose of this utility model is achieved by following technical proposals:
A kind of rotating speed modulate circuit, comprise signal generating circuit and circuit for signal conditioning, circuit for signal conditioning comprises coarse tuning circuit and fine tuning circuit, coarse tuning circuit comprises variable input control circuit and discharge circuit, variable input control circuit is connected with discharge circuit, fine tuning circuit comprises digital regulation resistance and regulates chip, and coarse tuning circuit is connected with signal generating circuit with fine tuning circuit simultaneously.The resistance of variable input control circuit controlling resistance, then by the coarse adjustment of discharge circuit realizing circuit, software control digital potentiometer regulates chip to regulate resistance, namely changes the resistance after coarse adjustment, thus realizing circuit fine tuning.The acting in conjunction of coarse adjustment and fine tuning, makes the process accuracy of detection and adjustment greatly improve.
As a kind of preferred version, the digit chip model that discharge circuit variable input control circuit adopts is CD408B, 8 pin that digit chip connects S1-S8 connect 8 identical fixed resistances of resistance respectively, and digit chip A0, A1 are connected with 3 pin of A2 KPH-SW1, KPH-SW2 and KPH-SW3 of regulating 8 fixed resistances respectively.
As a kind of preferred version, described digital regulation resistance regulates the model of chip to be HD3SS3415.
The beneficial effects of the utility model are, the coarse tuning circuit of rotating speed modulate circuit and the acting in conjunction of fine tuning circuit avoid the situation of Zero-cross comparator circuit error detection, substantially increase the operating efficiency of circuit.The utility model cost is lower, practical.
Accompanying drawing explanation
Fig. 1 is a kind of schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of signal generating circuit of the present utility model;
Fig. 3 is the circuit diagram of coarse tuning circuit of the present utility model;
Fig. 4 is the circuit diagram of fine tuning circuit of the present utility model.
Wherein: 1, signal generating circuit, 2, circuit for signal conditioning, 3, coarse tuning circuit, 4, fine tuning circuit, 5, variable input control circuit, 6, discharge circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment: a kind of rotating speed modulate circuit, its schematic block circuit diagram as shown in Figure 1, comprise signal generating circuit 1 and circuit for signal conditioning 2, circuit for signal conditioning comprises coarse tuning circuit 3 and fine tuning circuit 4, coarse tuning circuit comprises variable input control circuit 5 and discharge circuit 6, variable input control circuit is connected with discharge circuit, and fine tuning circuit comprises digital regulation resistance and regulates chip, and coarse tuning circuit is connected with signal generating circuit with fine tuning circuit simultaneously.
As shown in Figure 2, amplifier U302C is used for signal transmission to the circuit diagram of the circuit diagram of signal generating circuit, and amplifier U301C is used for signal to be inverted, and amplifier U302D is used for comparing with the signal after coarse tuning circuit and fine tuning circuit.The circuit diagram of coarse tuning circuit as shown in Figure 2, the digit chip model that discharge circuit variable input control circuit adopts is CD408B, 8 pin that digit chip connects S1-S8 connect 8 identical fixed resistances of resistance respectively, and digit chip A0, A1 are connected with 3 pin of A2 KPH-SW1, KPH-SW2 and KPH-SW3 of regulating 8 fixed resistances respectively.As shown in Figure 3, digital regulation resistance regulates the model of chip to be HD3SS3415 to the circuit diagram of fine tuning circuit.The resistance of variable input control circuit controlling resistance, then by the coarse adjustment of discharge circuit realizing circuit, software control digital potentiometer regulates chip to regulate resistance, namely changes the resistance after coarse adjustment, thus realizing circuit fine tuning.The acting in conjunction of coarse adjustment and fine tuning, makes the process accuracy of detection and adjustment greatly improve.
Claims (3)
1. a rotating speed modulate circuit, it is characterized in that, comprise signal generating circuit and circuit for signal conditioning, circuit for signal conditioning comprises coarse tuning circuit and fine tuning circuit, coarse tuning circuit comprises variable input control circuit and discharge circuit, variable input control circuit is connected with discharge circuit, and fine tuning circuit comprises digital regulation resistance and regulates chip, and coarse tuning circuit is connected with signal generating circuit with fine tuning circuit simultaneously.
2. a kind of rotating speed modulate circuit according to claim 1, it is characterized in that, the digit chip model that described discharge circuit variable input control circuit adopts is CD408B, 8 pin that digit chip connects S1-S8 connect 8 identical fixed resistances of resistance respectively, and digit chip A0, A1 are connected with 3 pin of A2 KPH-SW1, KPH-SW2 and KPH-SW3 of regulating 8 fixed resistances respectively.
3. a kind of rotating speed modulate circuit according to claim 1 and 2, is characterized in that, described digital regulation resistance regulates the model of chip to be HD3SS3415.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153649.7U CN204517772U (en) | 2015-03-18 | 2015-03-18 | Rotating speed modulate circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153649.7U CN204517772U (en) | 2015-03-18 | 2015-03-18 | Rotating speed modulate circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204517772U true CN204517772U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520153649.7U Active CN204517772U (en) | 2015-03-18 | 2015-03-18 | Rotating speed modulate circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204517772U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632633A (en) * | 2017-06-29 | 2018-01-26 | 深圳前海慧联科技发展有限公司 | A kind of adaptive range rotating speed modulate circuit and Opsonizing method |
-
2015
- 2015-03-18 CN CN201520153649.7U patent/CN204517772U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107632633A (en) * | 2017-06-29 | 2018-01-26 | 深圳前海慧联科技发展有限公司 | A kind of adaptive range rotating speed modulate circuit and Opsonizing method |
| CN107632633B (en) * | 2017-06-29 | 2019-01-08 | 深圳前海慧联科技发展有限公司 | A kind of adaptive range revolving speed conditioning circuit and Opsonizing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |