CN204536411U - A kind of pot Acquisition Circuit with burn out detection - Google Patents
A kind of pot Acquisition Circuit with burn out detection Download PDFInfo
- Publication number
- CN204536411U CN204536411U CN201420729032.0U CN201420729032U CN204536411U CN 204536411 U CN204536411 U CN 204536411U CN 201420729032 U CN201420729032 U CN 201420729032U CN 204536411 U CN204536411 U CN 204536411U
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- Prior art keywords
- pot
- circuit
- processor
- acquisition circuit
- pass filter
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Abstract
The utility model provides a kind of pot Acquisition Circuit with burn out detection, comprise second-order low-pass filter circuit, it is characterized in that described pot Acquisition Circuit also comprises a bleeder circuit, the output terminal of described bleeder circuit is connected with the input end of second-order low-pass filter circuit, the output terminal of second-order low-pass filter circuit is connected with processor, processor, by identifying the size of pot Acquisition Circuit input voltage, judges potentiometric broken string state.The utility model has the advantage of: by identifying the size of pot Acquisition Circuit input voltage, potentiometric broken string state can be judged, when pot is in broken string state, processor can detect this fault and send control signal to the controlled plant in downstream, prevent controlled plant to be in runaway condition completely, improve the security performance of product; This functional realiey gets up fairly simple, easy to operate; Realize cost lower.
Description
Technical field
The utility model relates to a kind of pot Acquisition Circuit with burn out detection, can be applicable to pot and regulates and a kind of pot Acquisition Circuit with burn out detection of pot station acquisition.
Background technology
Pot, as the adjustable electronic component of a kind of resistance, can be used for the size of regulation voltage and electric current according to certain Changing Pattern, thus be applied in brightness regulation more and more, speed regulates, volume adjusting or temperature to regulate etc. in product.
Modern electronic product or systems grow many employings bus data transfer mode, thus realize the control to upstream device, so in the product or system of the adjustment of a lot of use pot, first need processor to carry out position signal acquisition to pot.
Signal acquisition circuit in the past mainly carries out a process of filtering to signal, along with the security requirement of people to electronic equipment and system is more and more higher, traditional signal acquisition circuit more and more shows the limitation of himself performance, cannot meet the security requirement of product.
For Airborne Lighting System, Airborne Lighting System mainly adopts pot to carry out brightness adjustment control to it, traditional pot position signal acquisition main circuit will adopt second-order low-pass filter circuit to carry out filtering to signal, then signal is after filtering delivered to the ADC module of processor.But when pot breaks down, sliding contact is caused to be in vacant state, time contact for example between sliding contact and resistor occurs to depart from, the ADC module acquires of processor is less than any signal, thus cause processor cannot judge potentiometric position, so cannot provide a definite brightness regulated signal to light fixture, the now brightness of light fixture is in a uncertain state, and the security of illuminator reduces greatly.
Therefore, the improvement traditional pot position signal acquisition circuit made in design is necessary.
Utility model content
The utility model provides a kind of pot Acquisition Circuit with burn out detection, solves in prior art and causes processor cannot gather the problem of pot location status because of sliding contact broken string.
To achieve these goals, the technical solution of the utility model is as follows: a kind of pot Acquisition Circuit with burn out detection, comprise second-order low-pass filter circuit, it is characterized in that described pot Acquisition Circuit also comprises a bleeder circuit, the output terminal of described bleeder circuit is connected with the input end of second-order low-pass filter circuit, the output terminal of second-order low-pass filter circuit is connected with processor, and processor, by identifying the size of pot Acquisition Circuit input voltage, judges potentiometric broken string state.Described bleeder circuit comprises the first divider resistance and the second divider resistance, one end of first divider resistance is connected with input voltage, the other end of the first divider resistance is connected with the second divider resistance, the other end ground connection of the second divider resistance, the input end of described low-pass filter circuit is connected with the tie point of the first divider resistance and the second divider resistance.
The utility model has the advantage of: by identifying the size of pot Acquisition Circuit input voltage, potentiometric broken string state can be judged, when pot is in broken string state, processor can detect this fault and send control signal to the controlled plant in downstream, prevent controlled plant to be in runaway condition completely, improve the security performance of product; This functional realiey gets up fairly simple, easy to operate; Realize cost lower.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment functional block diagram.
Fig. 2 is the utility model embodiment circuit block diagram.
Below in conjunction with drawings and Examples, the utility model is elaborated.
Embodiment
The main circuit of pot Acquisition Circuit of the present utility model is still second-order low-pass filter circuit, at positive input termination one bleeder circuit of second-order low-pass filter circuit, to introduce an other road burn out detection voltage U 1, object is that when preventing pot sliding contact from breaking, processor collection pin is in vacant state, when sliding contact breaks, processor collects another road burn out detection voltage U 1, and now processor judges pot state and sends satisfactory control signal to controlled plant; This road burn out detection voltage U 1 increased can not exceed the input voltage range of processor pin; This road burn out detection voltage U 1 increased can not be included within the scope of pot output voltage, and object facilitates processor to the identification of pot broken string state; This road burn out detection voltage U 1 increased is that the mode of carrying out electric resistance partial pressure by input voltage obtains, use the benefit of electric resistance partial pressure be can at any time adjusting resistance to obtain the input voltage value oneself wanted; Above-mentioned used divider resistance resistance must be far longer than potentiometric end resistance (more than 200 times), and object prevents the potentiometric output voltage of divider resistance to normal work from producing disturbing effect.
Fig. 1 is the utility model embodiment functional block diagram, when pot normally works time, because the divider resistance resistance in bleeder circuit will be far longer than potentiometric end resistance, so now c point voltage is mainly potentiometric output voltage, the output voltage of bleeder circuit is substantially negligible, then after second-order low-pass filter circuit filtering, enter the ADC module of processor, then processor sends control signal to the controlled plant in downstream; When pot is in broken string state, c point voltage value is burn out detection voltage U 1, and all provided by bleeder circuit, then after second-order low-pass filter circuit filtering, enter the ADC module of processor, processor, by identifying the size of sampled value U1, judges potentiometric broken string state, then processor send meet designing requirement control signal to the controlled plant in downstream, avoid controlled plant to be in runaway condition.
Fig. 2 is physical circuit block diagram of the present utility model.This circuit comprises divider resistance R1 and divider resistance R2, and input voltage Ub obtains burn out detection magnitude of voltage U1 by the dividing potential drop effect of divider resistance R1 and divider resistance R2; The resistance of divider resistance R1 and divider resistance R2 will be far longer than potentiometric end resistance, when pot normally works, c point voltage value is mainly potentiometric output voltage values, the now impact of divider resistance R1 and divider resistance R2 on c point voltage value is very little, can ignore; When pot breaks down and is in broken string state, c point voltage value is burn out detection magnitude of voltage U1, is obtained by the dividing potential drop effect of divider resistance R1 and divider resistance R2; Burn out detection magnitude of voltage U1 can not be included within the scope of pot output voltage values, object facilitates processor to the identification of pot broken string state, burn out detection voltage U 1 delivers to processor after second-order low-pass filter circuit, after processor recognizes U1 magnitude of voltage, pot broken string state is judged, then the controlled plant in downstream is sent to the control signal meeting design.
Claims (2)
1. the pot Acquisition Circuit with burn out detection, comprise second-order low-pass filter circuit, it is characterized in that described pot Acquisition Circuit also comprises a bleeder circuit, the output terminal of described bleeder circuit is connected with the input end of second-order low-pass filter circuit, and the output terminal of second-order low-pass filter circuit is connected with processor.
2. pot Acquisition Circuit as claimed in claim 1, it is characterized in that, described bleeder circuit comprises the first divider resistance and the second divider resistance, one end of first divider resistance is connected with input voltage, the other end of the first divider resistance is connected with the second divider resistance, the other end ground connection of the second divider resistance, the input end of described low-pass filter circuit is connected with the tie point of the first divider resistance and the second divider resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729032.0U CN204536411U (en) | 2014-11-28 | 2014-11-28 | A kind of pot Acquisition Circuit with burn out detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729032.0U CN204536411U (en) | 2014-11-28 | 2014-11-28 | A kind of pot Acquisition Circuit with burn out detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536411U true CN204536411U (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420729032.0U Withdrawn - After Issue CN204536411U (en) | 2014-11-28 | 2014-11-28 | A kind of pot Acquisition Circuit with burn out detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN204536411U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242167A (en) * | 2015-10-20 | 2016-01-13 | 中国南方电网有限责任公司 | Substation conventional sampling instrument transformer secondary loop fracture online detection method |
| CN105699750A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | Potentiometer acquisition circuit having broken line detection function and broken line detection method thereof |
| CN108801186A (en) * | 2017-05-03 | 2018-11-13 | 布楼恩特公司 | trigger potentiometer |
-
2014
- 2014-11-28 CN CN201420729032.0U patent/CN204536411U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699750A (en) * | 2014-11-28 | 2016-06-22 | 上海航空电器有限公司 | Potentiometer acquisition circuit having broken line detection function and broken line detection method thereof |
| CN105699750B (en) * | 2014-11-28 | 2023-08-11 | 上海航空电器有限公司 | Potentiometer acquisition circuit with broken wire detection function and broken wire detection method thereof |
| CN105242167A (en) * | 2015-10-20 | 2016-01-13 | 中国南方电网有限责任公司 | Substation conventional sampling instrument transformer secondary loop fracture online detection method |
| CN105242167B (en) * | 2015-10-20 | 2017-11-03 | 中国南方电网有限责任公司 | Transformer station's routine sampling instrument transformer secondary circuit broken string online test method |
| CN108801186A (en) * | 2017-05-03 | 2018-11-13 | 布楼恩特公司 | trigger potentiometer |
| CN108801186B (en) * | 2017-05-03 | 2020-06-30 | 布楼恩特公司 | Trigger potentiometer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20230811 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20230811 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |