CN201788261U - Switching value detection circuit - Google Patents
Switching value detection circuit Download PDFInfo
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- CN201788261U CN201788261U CN2010205387982U CN201020538798U CN201788261U CN 201788261 U CN201788261 U CN 201788261U CN 2010205387982 U CN2010205387982 U CN 2010205387982U CN 201020538798 U CN201020538798 U CN 201020538798U CN 201788261 U CN201788261 U CN 201788261U
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- switching value
- circuit
- switch
- divider resistance
- processing unit
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- 238000001514 detection method Methods 0.000 title abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model relates to a switching value detection circuitry, including MCU processing unit (3), its characterized in that still includes switching value circuit (1) and sampling circuit (2), switching value circuit (1) output is connected with the input of sampling circuit (2), and the output of sampling circuit (2) is connected with the input of MCU processing unit (3). The utility model discloses MCU processing unit can not only distinguish the action logic of switching value through the detection to analog voltage, can also distinguish the abnormal state that the switch connector drops or the broken string effectively. The utility model discloses the circuit is simple, safe and reliable.
Description
Technical field
The utility model relates to a kind of switching value testing circuit, but the switching value testing circuit whether especially a kind of detector switch comes off, breaks belongs to the improvement technology of switching value testing circuit.
Background technology
Existing switching value class sensor has only " closure " and " disconnection " two kinds of logic states, but when the switch self of sensor takes place that connector comes off or during fault such as broken string, actual logic state regardless of detected object, system can think that all switch is in " disconnection " logic state by mistake, and makes false judgment and processing.
Summary of the invention
The purpose of this utility model be to consider the problems referred to above and provide a kind of can detection zone the switch-dividing switching value testing circuit that whether comes off, break.
The technical solution of the utility model is: a kind of switching value testing circuit, comprise the MCU processing unit, it is characterized in that also comprising switching value circuit and sample circuit, described switching value circuit output end is connected with the input end of sample circuit, and the output terminal of sample circuit is connected with the input end of MCU processing unit.
Described switching value circuit comprises the switch and first divider resistance, and the switch and first divider resistance are connected in parallel, and the A of parallel circuit, B two ends are connected with sample circuit respectively.
Described sample circuit comprises second divider resistance, the 3rd divider resistance, current-limiting resistance, filter capacitor, and wherein an end of second divider resistance is connected with the A end of switching value circuit, and the other end is connected with power supply; One end of the 3rd divider resistance is connected with the B end of current-limiting resistance, switching value circuit, and the other end is connected with common port; The other end of current-limiting resistance is connected with an end of filter capacitor and the A/D mouth of MCU processing unit; The other end of filter capacitor is connected with common port.
Described switch is temperature controller switch, water level switch, travel switch or keyswitch.
The utility model MCU processing unit can not only be distinguished the action logic of switching value by the detection to aanalogvoltage, can also distinguish the abnormality that the switch connector comes off or breaks effectively.The utility model circuit is simple, and is safe and reliable.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further specified.
As shown in Figure 1, the utility model switching value testing circuit, comprise switching value circuit 1, sample circuit 2, MCU processing unit 3, described switching value circuit 1 output terminal is connected with the input end of sample circuit 2, and the output terminal of sample circuit 2 is connected with the input end of MCU processing unit 3.
As shown in Figure 2, described switching value circuit 1 comprises the switch T11 and the first divider resistance R11, and the switch T11 and the first divider resistance R11 are connected in parallel, and the A of parallel circuit, B two ends are connected with sample circuit 2 respectively.Described switch T11 is temperature controller switch, water level switch, travel switch or keyswitch
Described sample circuit 2 comprises the second divider resistance R21, the 3rd divider resistance R22, current-limiting resistance R23, filter capacitor C21, and wherein the end of the second divider resistance R21 is connected with the A end of switching value circuit 1, and the other end is connected with power supply U; The end of the 3rd divider resistance R22 is connected with the B end of current-limiting resistance R23, switching value circuit 1, and the other end is connected with public terminal GND; The other end of current-limiting resistance R23 is connected with the end of filter capacitor C21 and the A/D mouth of MCU processing unit 3; The other end of filter capacitor C21 is connected with public terminal GND.
In the present embodiment, the first divider resistance R11, the second divider resistance R21, the 3rd divider resistance R22 resistance equate.
Principle of work of the present utility model is: when switch generation connector comes off: promptly A, B point disconnects or the A point disconnects or B point when disconnecting, owing to the existence of divider resistance R22, the current potential of AD mouth and public terminal GND equipotential, the sampled voltage Vin=0V of AD mouth simultaneously; When switch T11 is in off-state, resistance R 21, resistance R 11, resistance R 22 series connection dividing potential drops, the sampled voltage Vin=(R22/(R21+R11+R22 of AD mouth)) * U=1/3U; When switch T11 is in closure state, the sampling Vin=(R22/(R21+R22 of AD mouth)) * U=1/2U.Therefore, the MCU processing unit can not only be distinguished " closure/disconnection " logic state of switch by the detection to the different sampled voltages of AD mouth, can also distinguish the abnormality that the switch connector comes off or breaks effectively, and then makes corresponding warning and handle.
Claims (4)
1. switching value testing circuit, comprise MCU processing unit (3), it is characterized in that also comprising switching value circuit (1) and sample circuit (2), described switching value circuit (1) output terminal is connected with the input end of sample circuit (2), and the output terminal of sample circuit (2) is connected with the input end of MCU processing unit (3).
2. switching value testing circuit according to claim 1, it is characterized in that described switching value circuit (1) comprises switch (T11) and first divider resistance (R11), switch (T11) is connected in parallel with first divider resistance (R11), and the A of parallel circuit, B two ends are connected with sample circuit (2) respectively.
3. switching value testing circuit according to claim 2, it is characterized in that described sample circuit (2) comprises second divider resistance (R21), the 3rd divider resistance (R22), current-limiting resistance (R23), filter capacitor (C21), wherein an end of second divider resistance (R21) is connected with the A end of switching value circuit (1), and the other end is connected with power supply (U); One end of the 3rd divider resistance (R22) is connected with the B end of current-limiting resistance (R23), switching value circuit (1), and the other end is connected with common port (GND); The other end of current-limiting resistance (R23) is connected with an end of filter capacitor (C21) and the A/D mouth of MCU processing unit (3); The other end of filter capacitor (C21) is connected with common port (GND).
4. switching value testing circuit according to claim 2 is characterized in that described switch (T11) is temperature controller switch, water level switch, travel switch or keyswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205387982U CN201788261U (en) | 2010-09-24 | 2010-09-24 | Switching value detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205387982U CN201788261U (en) | 2010-09-24 | 2010-09-24 | Switching value detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788261U true CN201788261U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205387982U Expired - Fee Related CN201788261U (en) | 2010-09-24 | 2010-09-24 | Switching value detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201788261U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841230A (en) * | 2012-09-25 | 2012-12-26 | 上海微频莱机电科技有限公司 | Safety protection structure of voltage detection circuit |
| CN103852680A (en) * | 2012-12-07 | 2014-06-11 | 中国核动力研究设计院 | Device and method for detecting broken line of switching value signal transmission circuit |
| CN105652191A (en) * | 2015-12-11 | 2016-06-08 | 重庆川仪自动化股份有限公司 | Safety loop state monitoring system |
| CN110673013A (en) * | 2019-09-02 | 2020-01-10 | 武汉光庭科技有限公司 | Automatic detection method and device for switch and switch circuit |
| CN112605984A (en) * | 2020-12-25 | 2021-04-06 | 深圳市越疆科技有限公司 | Firing pin type band-type brake device of mechanical arm joint, mechanical arm joint and mechanical arm |
-
2010
- 2010-09-24 CN CN2010205387982U patent/CN201788261U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841230A (en) * | 2012-09-25 | 2012-12-26 | 上海微频莱机电科技有限公司 | Safety protection structure of voltage detection circuit |
| CN103852680A (en) * | 2012-12-07 | 2014-06-11 | 中国核动力研究设计院 | Device and method for detecting broken line of switching value signal transmission circuit |
| CN105652191A (en) * | 2015-12-11 | 2016-06-08 | 重庆川仪自动化股份有限公司 | Safety loop state monitoring system |
| CN105652191B (en) * | 2015-12-11 | 2019-01-08 | 重庆川仪自动化股份有限公司 | A kind of safety return circuit condition monitoring system |
| CN110673013A (en) * | 2019-09-02 | 2020-01-10 | 武汉光庭科技有限公司 | Automatic detection method and device for switch and switch circuit |
| CN110673013B (en) * | 2019-09-02 | 2022-05-24 | 武汉光庭科技有限公司 | Automatic detection method and device for switch and switch circuit |
| CN112605984A (en) * | 2020-12-25 | 2021-04-06 | 深圳市越疆科技有限公司 | Firing pin type band-type brake device of mechanical arm joint, mechanical arm joint and mechanical arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING Co.,Ltd. Assignor: Midea Group Contract record no.: 2012440000405 Denomination of utility model: Switching value detection circuit Granted publication date: 20110406 License type: Exclusive License Record date: 20120712 |
|
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 beautiful road, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Midea Group |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20180924 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |