CN112504488A - Temperature sensor matching capacitor adapting device and method - Google Patents
Temperature sensor matching capacitor adapting device and method Download PDFInfo
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- CN112504488A CN112504488A CN202011237285.2A CN202011237285A CN112504488A CN 112504488 A CN112504488 A CN 112504488A CN 202011237285 A CN202011237285 A CN 202011237285A CN 112504488 A CN112504488 A CN 112504488A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 230000002159 abnormal effect Effects 0.000 claims abstract description 7
- 230000006978 adaptation Effects 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a temperature sensor matching capacitor adapting device and a method, wherein a temperature sensor is electrically connected with a temperature detection controller through a matching capacitor; the temperature detection controller judges whether the temperature detected by the temperature sensor is normal or not, and controls the matching capacitor switching circuit to switch the matching capacitor if the temperature detected by the temperature sensor is abnormal. The invention judges the output of the temperature sensor in real time, and switches the matching capacitor in time when the temperature detected by the temperature sensor is abnormal, thereby avoiding the output offset and instability of the temperature sensor and improving the detection accuracy of the system.
Description
Technical Field
The invention relates to the field of temperature sensors, in particular to a temperature sensor matching capacitance adaptation device and method.
Background
The application range of the temperature sensor in the circuit is very wide, and in practical use, the temperature sensor can be generally matched with an external matching capacitor to meet normal work, but because the temperature sensor is influenced by factors such as manufacturing process, temperature, aging rate and the like, output deviation and instability are easily caused under the condition of a single fixed external matching capacitor, and faults of a circuit system are easily caused.
Disclosure of Invention
In order to solve the above problems, the present invention provides an adaptive device and method for matching capacitance of a temperature sensor.
The technical scheme of the invention is as follows: a temperature sensor matching capacitor adapting device is characterized in that a temperature sensor is electrically connected with a temperature detection controller through a matching capacitor, the device comprises a matching capacitor switching circuit, the input end of the matching capacitor switching circuit is electrically connected with the output end of the temperature detection controller, and the output end of the matching capacitor switching circuit is electrically connected with the matching capacitor;
the temperature detection controller judges whether the temperature detected by the temperature sensor is normal or not, and controls the matching capacitor switching circuit to switch the matching capacitor if the temperature detected by the temperature sensor is abnormal.
Further, whether the temperature detected by the temperature sensor is normal is judged, specifically:
judging whether the difference value between the temperature detected by the temperature sensor and the temperature detected by the standard temperature sensor exceeds a threshold value or not;
if the temperature does not exceed the threshold, the temperature detected by the temperature sensor is normal; if the temperature exceeds the threshold value, the temperature sensor detects temperature abnormality.
Further, when all the matching capacitors are not suitable, the temperature detection controller gives an alarm.
Further, the temperature detection controller is a CPLD chip or an MCU chip.
Further, the matching capacitance includes at least 2.
The technical scheme of the invention also comprises a temperature sensor matching capacitance adaptation method based on the device, which comprises the following steps:
the temperature detection sensor receives the temperature detected by the temperature sensor;
judging whether the received temperature is normal;
if not, a matching capacitor switching circuit is controlled to switch the matching capacitor.
Further, judging whether the received temperature is normal, specifically:
judging whether the difference value between the temperature detected by the temperature sensor and the temperature detected by the standard temperature sensor exceeds a threshold value or not;
if the temperature does not exceed the threshold, the temperature detected by the temperature sensor is normal; if the temperature exceeds the threshold value, the temperature sensor detects temperature abnormality.
Further, the method comprises the steps of:
and when all the matching capacitors are not suitable, the temperature detection controller gives an alarm.
Further, the temperature detection controller is a CPLD chip or an MCU chip.
Further, the matching capacitance includes at least 2.
The temperature sensor matching capacitor adapting device and method provided by the invention can judge the output of the temperature sensor in real time, and switch the matching capacitor in time when the temperature detected by the temperature sensor is abnormal, thereby avoiding the output offset and instability of the temperature sensor and improving the detection accuracy of the system.
Drawings
FIG. 1 is a block diagram illustrating a structure of an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
Example one
As shown in fig. 1, in the present embodiment, an adaptive device for a matching capacitor 2 of a temperature sensor 1 is provided, where the temperature sensor 1 is electrically connected to a temperature detection controller 3 through the matching capacitor 2, it should be noted that, in the present embodiment, the matching capacitor 2 includes at least 2, the temperature sensor 1 is connected to only one of the matching capacitors, and the file detection controller switches the matching capacitor 2 according to an output of the temperature sensor 1.
The device comprises a matching capacitor switching circuit 4, wherein the input end of the matching capacitor switching circuit 4 is electrically connected with the output end of a temperature detection controller 3, and the output end of the matching capacitor switching circuit 4 is electrically connected with a matching capacitor 2.
The temperature detection controller 3 judges whether the temperature detected by the temperature sensor 1 is normal, and controls the matching capacitor switching circuit 4 to switch the matching capacitor 2 if the temperature detected by the temperature sensor 1 is abnormal. It should be noted that, after the matching capacitor 2 is switched, the temperature detection controller 3 continues to detect the output of the temperature sensor 1, and if the output is not normal, the switching is continued until a suitable matching capacitor 2 is found. And if all the matching capacitors 2 are not suitable, sending out alarm information.
In this embodiment, the temperature detection controller 3 may be a CPLD (Complex programmable logic device) chip or an MCU (micro controller Unit) chip to implement detection, judgment and switching.
Example two
As shown in fig. 2, on the basis of the first embodiment, the present embodiment provides an adaptation method for a matching capacitor 2 of a temperature sensor 1, which includes the following steps:
s1, the temperature detection sensor receives the temperature detected by the temperature sensor 1;
s2, judging whether the received temperature is normal;
s3, if not normal, a matching capacitor switching circuit 4 is controlled to switch the matching capacitor 2.
Step S2 is to determine whether the received temperature is normal, specifically:
judging whether the difference value between the temperature detected by the temperature sensor 1 and the temperature detected by the standard temperature sensor 1 exceeds a threshold value;
if the temperature does not exceed the threshold, the temperature sensor 1 detects that the temperature is normal; if the temperature exceeds the threshold, the temperature sensor 1 detects a temperature abnormality.
It should be noted that the matching capacitors 2 include at least 2 capacitors for switching. After the matching capacitor 2 is switched, the temperature detection controller 3 continues to detect the output of the temperature sensor 1, and if the output is abnormal, the switching is continued until a proper matching capacitor 2 is found. And if all the matching capacitors 2 are not suitable, sending out alarm information.
In addition, the temperature detection controller 3 can be a CPLD chip or an MCU chip to realize detection, judgment and switching.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A temperature sensor matching capacitor adapting device is characterized by comprising a matching capacitor switching circuit, wherein the input end of the matching capacitor switching circuit is electrically connected with the output end of a temperature detection controller, and the output end of the matching capacitor switching circuit is electrically connected with a matching capacitor;
the temperature detection controller judges whether the temperature detected by the temperature sensor is normal or not, and controls the matching capacitor switching circuit to switch the matching capacitor if the temperature detected by the temperature sensor is abnormal.
2. The adaptive device for matching capacitance of a temperature sensor according to claim 1, wherein the judgment of whether the temperature detected by the temperature sensor is normal is specifically as follows:
judging whether the difference value between the temperature detected by the temperature sensor and the temperature detected by the standard temperature sensor exceeds a threshold value or not;
if the temperature does not exceed the threshold, the temperature detected by the temperature sensor is normal; if the temperature exceeds the threshold value, the temperature sensor detects temperature abnormality.
3. The matched capacitance adaption device for the temperature sensor as claimed in claim 1 or 2, wherein the temperature detection controller gives an alarm when all matched capacitances are not suitable.
4. The temperature sensor matching capacitor adapting device according to claim 1 or 2, wherein the temperature detection controller is a CPLD chip or an MCU chip.
5. Temperature sensor matching capacitance adaption device according to claim 1 or 2, characterized in that the matching capacitance comprises at least 2.
6. A method for matching capacitance adaptation of a temperature sensor based on the device of claim 1, comprising the steps of:
the temperature detection sensor receives the temperature detected by the temperature sensor;
judging whether the received temperature is normal;
if not, a matching capacitor switching circuit is controlled to switch the matching capacitor.
7. The method for matching capacitance adaptation of a temperature sensor according to claim 6, wherein the step of determining whether the received temperature is normal is specifically:
judging whether the difference value between the temperature detected by the temperature sensor and the temperature detected by the standard temperature sensor exceeds a threshold value or not;
if the temperature does not exceed the threshold, the temperature detected by the temperature sensor is normal; if the temperature exceeds the threshold value, the temperature sensor detects temperature abnormality.
8. The method for matching capacitance adaptation of a temperature sensor according to claim 6 or 7, characterized in that the method further comprises the steps of:
and when all the matching capacitors are not suitable, the temperature detection controller gives an alarm.
9. The method for matching capacitance adaptation of a temperature sensor according to claim 6 or 7, wherein the temperature detection controller is a CPLD chip or an MCU chip.
10. The method of claim 6 or 7, wherein the matching capacitance comprises at least 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237285.2A CN112504488A (en) | 2020-11-09 | 2020-11-09 | Temperature sensor matching capacitor adapting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237285.2A CN112504488A (en) | 2020-11-09 | 2020-11-09 | Temperature sensor matching capacitor adapting device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112504488A true CN112504488A (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011237285.2A Withdrawn CN112504488A (en) | 2020-11-09 | 2020-11-09 | Temperature sensor matching capacitor adapting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112504488A (en) |
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2020
- 2020-11-09 CN CN202011237285.2A patent/CN112504488A/en not_active Withdrawn
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Application publication date: 20210316 |