CN215219115U - On-line fault detection circuit of resistance type sensor - Google Patents
On-line fault detection circuit of resistance type sensor Download PDFInfo
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- CN215219115U CN215219115U CN202121513838.2U CN202121513838U CN215219115U CN 215219115 U CN215219115 U CN 215219115U CN 202121513838 U CN202121513838 U CN 202121513838U CN 215219115 U CN215219115 U CN 215219115U
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- resistance
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- type sensor
- resistor
- fault detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000003466 welding Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The on-line fault detection circuit comprises a voltage division circuit consisting of a resistance sensor RP1 and a resistance component, wherein the voltage division circuit is used for limiting the output voltage range of the resistance sensor RP1, one end of the voltage division circuit is connected with a power supply, the other end of the voltage division circuit is grounded, and the signal output end of the resistance sensor RP1 is connected with a grounded resistor R3. The utility model discloses a principle of resistance partial pressure, through the bleeder circuit restriction resistance type sensor's that sets up and resistance type sensor is constituteed output range, when faults such as desoldering, broken string appear at resistance type sensor, resistance type sensor output voltage will surpass normal output range, realizes resistance type sensor on-line fault detection, this circuit low cost, easily realization can effectively judge faults such as resistance type sensor desoldering, broken string.
Description
Technical Field
The utility model belongs to the technical field of electronic circuit, concretely relates to online fault detection circuit of resistance-type sensor.
Background
The avionic product is required to have a self-detection function, and the product and peripheral sensors need to be monitored on line to determine whether the product works normally. The output signal of the resistive sensor is the full range of the input signal, and when the resistive sensor has faults such as welding failure, wire breakage and the like, the output signal is the maximum value or the minimum value, and whether the sensor is in the limit position or the sensor is in a fault cannot be judged, so that improvement is needed for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the on-line fault detection circuit of the resistance-type sensor is low in cost and easy to realize, and can effectively judge the faults of the resistance-type sensor such as welding failure and wire breakage.
The utility model adopts the technical proposal that: the online fault detection circuit of the resistance sensor comprises a voltage division circuit consisting of the resistance sensor RP1 and a resistance component, wherein the voltage division circuit is used for limiting the output voltage range of the resistance sensor RP1, one end of the voltage division circuit is connected with a power supply, the other end of the voltage division circuit is grounded, and the signal output end of the resistance sensor RP1 is connected with a grounded resistor R3.
Wherein, resistance module includes resistance R1 and resistance R2, bleeder circuit includes resistance sensor RP1, resistance R1 and resistance R2, resistance R1 one end is connected with the power, the resistance R1 other end is connected with a resistance sensor RP1 stiff end, another stiff end of sensor RP1 is connected with resistance R2 one end, resistance R2 other end ground connection.
Further, the resistance values of the resistor R1 and the resistor R2 are equal, and the resistance values of the resistor R1 and the resistor R2 are much smaller than the total resistance value of the resistive sensor RP 1.
Furthermore, the movable end of the resistance sensor RP1 is connected to one end of a resistor R3, the other end of the resistor R3 is grounded, and the resistance value of the resistor R3 is much greater than the total resistance value of the resistance sensor RP 1.
The utility model has the advantages compared with the prior art:
1. the technical scheme adopts the principle of resistance voltage division, the output range of the resistance-type sensor RP1 is limited by arranging a voltage division circuit formed by the resistance-type sensor RP1, and when the resistance-type sensor RP1 has faults of welding failure, wire breakage and the like, the output voltage of the resistance-type sensor RP1 exceeds the normal output range, so that the online fault detection of the resistance-type sensor RP1 is realized;
2. according to the technical scheme, the resistor R3 which is far larger than the total resistance value of the resistance-type sensor RP1 is connected to the movable end of the resistance-type sensor RP1, so that the output signal is reliably grounded when no input signal exists on the basis that the influence on the output voltage is controllable;
3. according to the technical scheme, the resistance values of the resistor R1 and the resistor R2 are reasonably selected, so that the reduction of the output precision of the resistance sensor RP1 is acceptable;
4. the technical scheme has the advantages of simple structure, convenience in installation, low circuit cost and easiness in implementation, and can effectively judge faults such as resistance type sensor desoldering and wire breaking.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
An embodiment of the present invention will be described in conjunction with fig. 1, so that the technical solution will be described clearly and completely, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The online fault detection circuit of the resistance sensor comprises a voltage division circuit consisting of the resistance sensor RP1 and a resistance component, wherein the voltage division circuit is used for limiting the output voltage range of the resistance sensor RP1, one end of the voltage division circuit is connected with a power supply, the other end of the voltage division circuit is grounded, and the signal output end of the resistance sensor RP1 is connected with a grounded resistor R3.
The voltage division circuit specifically comprises the following components: the voltage division circuit comprises a resistance-type sensor RP1, a resistor R1 and a resistor R2, one end of the resistor R1 is connected with a power supply, the other end of the resistor R1 is connected with one fixed end of the resistance-type sensor RP1, the other fixed end of the sensor RP1 is connected with one end of a resistor R2, and the other end of the resistor R2 is grounded; specifically, the resistance values of the resistor R1 and the resistor R2 are equal, and the resistance values of the resistor R1 and the resistor R2 are much smaller than the total resistance value of the resistance sensor RP 1.
The resistance component comprises a resistor R1 and a resistor R2, the movable end of the resistance sensor RP1 is connected with one end of a resistor R3, the other end of the resistor R3 is grounded, and the resistance value of the resistor R3 is far greater than the total resistance value of the resistance sensor RP 1.
The voltage division circuit consists of a resistor R1, a resistor R2 and a resistance-type sensor RP1, wherein a resistor R3 which is far greater than the total resistance of the resistance-type sensor RP1 is connected with the movable end of the resistance-type sensor RP1, so that the output signal is reliably grounded when no input signal exists on the basis that the influence on the output voltage is controllable; the resistance values of the resistor R1 and the resistor R2 are the same and far smaller than the total resistance value of the resistance-type sensor RP1, and the decrease of the output accuracy of the resistance-type sensor RP1 is acceptable through reasonable selection of the resistance values of the resistor R1 and the resistor R2; the output voltage V1 range of the resistance-type sensor RP1 is R2/(R1+ RP1+ R2) VCC to [1-R2/(R1+ RP1+ R2) ] VCC, when the resistance-type sensor RP1 has faults such as welding failure and disconnection, the output voltage V1 exceeds the normal output range and reaches the power supply voltage VCC or 0 voltage, and the faults such as welding failure and disconnection of the resistance-type sensor RP1 can be monitored on line by detecting the output voltage V1.
By adopting the principle of resistance voltage division, the output range of the resistance-type sensor RP1 is limited by arranging a voltage division circuit formed by the resistance-type sensor RP1, when the resistance-type sensor RP1 has faults of welding failure, wire breakage and the like, the output voltage of the resistance-type sensor RP1 exceeds the normal output range, the online fault detection of the resistance-type sensor RP1 is realized, the circuit is low in cost and easy to realize, and the faults of welding failure, wire breakage and the like of the resistance-type sensor RP1 can be effectively judged.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims (4)
1. The resistance-type sensor online fault detection circuit is characterized in that: the voltage dividing circuit comprises a resistance type sensor RP1 and a resistance component, the voltage dividing circuit is used for limiting the output voltage range of the resistance type sensor RP1, one end of the voltage dividing circuit is connected with a power supply, the other end of the voltage dividing circuit is grounded, and the signal output end of the resistance type sensor RP1 is connected with a grounded resistor R3.
2. The resistive sensor online fault detection circuit of claim 1, wherein: the resistance assembly includes resistance R1 and resistance R2, bleeder circuit includes resistance sensor RP1, resistance R1 and resistance R2, resistance R1 one end is connected with the power, the resistance R1 other end is connected with a resistance sensor RP1 stiff end, another stiff end of sensor RP1 is connected with resistance R2 one end, resistance R2 other end ground connection.
3. The resistive sensor online fault detection circuit of claim 2, wherein: the resistance values of the resistor R1 and the resistor R2 are equal, and the resistance values of the resistor R1 and the resistor R2 are far smaller than the total resistance value of the resistance sensor RP 1.
4. The resistive sensor online fault detection circuit of claim 1, 2, or 3, wherein: the movable end of the resistance sensor RP1 is connected with one end of a resistor R3, the other end of the resistor R3 is grounded, and the resistance value of the resistor R3 is far greater than the total resistance value of the resistance sensor RP 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513838.2U CN215219115U (en) | 2021-07-05 | 2021-07-05 | On-line fault detection circuit of resistance type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121513838.2U CN215219115U (en) | 2021-07-05 | 2021-07-05 | On-line fault detection circuit of resistance type sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215219115U true CN215219115U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121513838.2U Expired - Fee Related CN215219115U (en) | 2021-07-05 | 2021-07-05 | On-line fault detection circuit of resistance type sensor |
Country Status (1)
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| CN (1) | CN215219115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950470A (en) * | 2022-12-20 | 2023-04-11 | 陕西宝成航空仪表有限责任公司 | Sensor function self-checking circuit |
-
2021
- 2021-07-05 CN CN202121513838.2U patent/CN215219115U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115950470A (en) * | 2022-12-20 | 2023-04-11 | 陕西宝成航空仪表有限责任公司 | Sensor function self-checking circuit |
| CN115950470B (en) * | 2022-12-20 | 2024-04-19 | 陕西宝成航空仪表有限责任公司 | Sensor function self-checking circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211217 |