CN103698652A - Thermal resistor open circuit detection method - Google Patents
Thermal resistor open circuit detection method Download PDFInfo
- Publication number
- CN103698652A CN103698652A CN201310741680.8A CN201310741680A CN103698652A CN 103698652 A CN103698652 A CN 103698652A CN 201310741680 A CN201310741680 A CN 201310741680A CN 103698652 A CN103698652 A CN 103698652A
- Authority
- CN
- China
- Prior art keywords
- thermal resistance
- open
- open circuit
- processor
- thermal resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a thermal resistor open circuit detection method for a control system and belongs to the technical field of industrial detection methods. The method is characterized in that a comparator is adopted to compare a voltage formed by a thermal resistor with a reference voltage, and output signals to a processor so that the processor can judge whether the thermal resistor is in an open circuit according to the acquired signals. The method solves the problem that a meter which achieves detection through a thermal resistor doesn't have a thermal resistor open circuit detection method in the prior art, and also solves the problem that the control system judges whether an in-situ sampled RTD is in an open circuit. The method achieves the thermal resistor open circuit detection in such a way that the comparator is adopted to compare the voltage generated by the thermal resistor with the reference voltage, and output signals to the processor.
Description
Technical field
The present invention relates to a kind of industrial detection method, relate in particular to a kind of open circuit of the thermal resistance for control system detection method.
Background technology
Thermal resistance (thermal resistor) is the most frequently used a kind of Temperature Detector in middle low-temperature space.To be resistance value based on metallic conductor increase this characteristic with the increase of temperature to Thermistor Temperature Measurement carries out thermometric.Its principal feature is that measuring accuracy is high, stable performance.Wherein the measuring accuracy of platinum resistance thermometer sensor, is the highest, and it is not only widely used in industrial thermometric, and is made into the station meter of standard.
The instrument that realizes detection by thermal resistance mode in prior art does not possess thermal resistance open circuit detection method.
Summary of the invention
The invention discloses a kind of thermal resistance open circuit detection method, in order to solve in prior art the instrument that realizes detection by thermal resistance mode, do not possess the problem of thermal resistance open circuit detection method.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of thermal resistance open circuit detection method, wherein, comprising: a comparer obtains the voltage that thermal resistance forms, and described comparer compares the thermal resistance output voltage obtaining and a reference voltage, if the voltage that thermal resistance forms is greater than reference voltage, comparer output high level is to processor; If the voltage that thermal resistance forms is 0, comparer output low level is to processor.
Thermal resistance open circuit detection method as above, wherein, processor obtains the signal of comparer output, if processor obtains high level, by open-circuit condition position 0, expression thermal resistance is not opened a way; If processor obtains low level, controller, by open-circuit condition position 1, represents thermal resistance open circuit.
Thermal resistance open circuit detection method as above, wherein, processor sends to control system by open-circuit condition position, shows whether thermal resistance opens a way on the monitored picture of control system, if open-circuit condition is 0, on the monitored picture of control system, the lamp of open-circuit condition is extinguished; If open-circuit condition is 1, on the monitored picture of control system, the lamp of open-circuit condition is lighted.
In sum, owing to having adopted technique scheme, the invention solves in prior art the problem that the instrument that realizes detection by thermal resistance mode does not possess thermal resistance open circuit detection method; The present invention has also solved control system and has judged the problem whether RTD of spot sampling opens a way.The present invention compares by comparer voltage and the reference voltage that thermal resistance produces, and outputs signal to the detection that processor is realized thermal resistance open circuit, and the present invention is simple in structure, can be for detection of in instrument.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of thermal resistance open circuit detection method of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further:
Fig. 1 is the schematic diagram of thermal resistance open circuit detection method of the present invention, refer to Fig. 1, a kind of thermal resistance open circuit detection method, wherein, comprising: electric current flows through thermal resistance, on thermal resistance, form certain voltage, one comparer obtains the voltage that thermal resistance forms, comparer compares the thermal resistance output voltage obtaining and a reference voltage, if the voltage that thermal resistance forms is greater than reference voltage, comparer output high level is to processor; If the voltage that thermal resistance forms is 0, comparer output low level is to processor, and processor can judge by the signal obtaining whether thermal resistance opens a way.
Processor of the present invention obtains the signal of comparer output, if processor obtains high level, by open-circuit condition position 0, expression thermal resistance is not opened a way; If processor obtains low level, controller, by open-circuit condition position 1, represents thermal resistance open circuit.
Processor of the present invention sends to control system by open-circuit condition position, shows whether thermal resistance opens a way on the monitored picture of control system, if open-circuit condition is 0, on the monitored picture of control system, the lamp of open-circuit condition is extinguished; If open-circuit condition is 1, on the monitored picture of control system, the lamp of open-circuit condition is lighted.
In sum, owing to having adopted technique scheme, the invention solves in prior art the problem that the instrument that realizes detection by thermal resistance mode does not possess thermal resistance open circuit detection method, the present invention compares by comparer voltage and the reference voltage that thermal resistance produces, and output signal to the detection that processor is realized thermal resistance open circuit, of the present invention simple in structure, easy for installation, can be in instrument detector table.
Claims (3)
1. thermal resistance open circuit detection method, it is characterized in that, comprise: a comparer obtains the voltage that thermal resistance forms, described comparer compares the thermal resistance output voltage obtaining and a reference voltage, if the voltage that thermal resistance forms is greater than reference voltage, comparer output high level is to processor; If the voltage that thermal resistance forms is 0, comparer output low level is to processor.
2. thermal resistance open circuit detection method according to claim 1, is characterized in that, processor obtains the signal of comparer output, if processor obtains high level, by open-circuit condition position 0, expression thermal resistance is not opened a way; If processor obtains low level, controller, by open-circuit condition position 1, represents thermal resistance open circuit.
3. thermal resistance according to claim 1 open circuit detection method, it is characterized in that, processor sends to control system by open-circuit condition position, on the monitored picture of control system, show whether thermal resistance opens a way, if open-circuit condition is 0, on the monitored picture of control system, the lamp of open-circuit condition is extinguished; If open-circuit condition is 1, on the monitored picture of control system, the lamp of open-circuit condition is lighted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741680.8A CN103698652A (en) | 2013-12-30 | 2013-12-30 | Thermal resistor open circuit detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741680.8A CN103698652A (en) | 2013-12-30 | 2013-12-30 | Thermal resistor open circuit detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103698652A true CN103698652A (en) | 2014-04-02 |
Family
ID=50360248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310741680.8A Pending CN103698652A (en) | 2013-12-30 | 2013-12-30 | Thermal resistor open circuit detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103698652A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277834A (en) * | 2014-06-18 | 2016-01-27 | 艾默生网络能源有限公司 | Detection circuit |
| CN107607826A (en) * | 2017-09-14 | 2018-01-19 | 浙江正泰中自控制工程有限公司 | A kind of dcs I/O module break detection circuit and its detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781390Y (en) * | 2005-03-14 | 2006-05-17 | 重庆汇力汽车电子仪表有限公司 | Vehicle loading short circuit, open circuit predetection circuit |
| CN2814762Y (en) * | 2005-03-17 | 2006-09-06 | 重庆汇力汽车电子仪表有限公司 | Vehicle load electric control switch with short-circuit and open-circuit predetection |
| CN102539002A (en) * | 2011-12-10 | 2012-07-04 | 洛阳市环城供电局 | Temperature alarm of transformer |
-
2013
- 2013-12-30 CN CN201310741680.8A patent/CN103698652A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781390Y (en) * | 2005-03-14 | 2006-05-17 | 重庆汇力汽车电子仪表有限公司 | Vehicle loading short circuit, open circuit predetection circuit |
| CN2814762Y (en) * | 2005-03-17 | 2006-09-06 | 重庆汇力汽车电子仪表有限公司 | Vehicle load electric control switch with short-circuit and open-circuit predetection |
| CN102539002A (en) * | 2011-12-10 | 2012-07-04 | 洛阳市环城供电局 | Temperature alarm of transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277834A (en) * | 2014-06-18 | 2016-01-27 | 艾默生网络能源有限公司 | Detection circuit |
| CN107607826A (en) * | 2017-09-14 | 2018-01-19 | 浙江正泰中自控制工程有限公司 | A kind of dcs I/O module break detection circuit and its detection method |
| CN107607826B (en) * | 2017-09-14 | 2019-12-17 | 浙江正泰中自控制工程有限公司 | distributed control system IO module disconnection detection circuit and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2926428B1 (en) | Monitoring operating condition of electrical component | |
| ES2705433T3 (en) | Method for temperature drift compensation of temperature measurement device using thermocouple | |
| US20130022075A1 (en) | Temperature sensor having means for in-situ calibration | |
| CN203216630U (en) | Automatic temperature detection system | |
| CN103487158A (en) | Thermocouple | |
| CN109375670A (en) | Closed loop thermal control system and closed loop thermal control method without temperature sensor | |
| CN103698652A (en) | Thermal resistor open circuit detection method | |
| CN104422541B (en) | Battery detection circuit, method and the mobile terminal of mobile terminal | |
| CN202854100U (en) | Thermal conductivity detectors of gas chromatographic analyzer | |
| US20130163633A1 (en) | Thermocouple welding test apparatus | |
| CN201051023Y (en) | Probe for temperature and humidity measurement of big jujube drying room | |
| CN105758548A (en) | Temperature measurement circuit of platinum thermal resistor PT100 | |
| CN203534993U (en) | Integrated conductance cell type hydrogen analyzer | |
| CN203365368U (en) | Semi-conductor gas sensor with temperature compensation function | |
| CN107014511B (en) | Point heat source temperature testing method incapable of being in direct contact | |
| US10670685B2 (en) | Method for detecting a fault in an electricity meter including a breaking unit | |
| US9857325B2 (en) | Electrochemical sensing using comparison of voltage-current time differential values during waveform generation and detection | |
| CN201413338Y (en) | Low wind speed measuring sensor | |
| CN111781969B (en) | Temperature control circuit, device and chip packaging test system | |
| CN201780167U (en) | Katathermometer mounting base | |
| CN204374801U (en) | Automatic alarm constant-temperature testing device | |
| CN203204763U (en) | Electrical fire warning device | |
| CN105157862A (en) | Thermal resistance temperature sensor | |
| CN205427125U (en) | Insulator leakage current and discharge arc temperature measuring device | |
| JP5266287B2 (en) | Gas concentration detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD. Free format text: FORMER OWNER: SHANGHAI AUTOMATIC INDUSTRUMENT AND METER CO LTD Effective date: 20150615 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150615 Address after: Zhabei District Shanghai City 200072 West Guangzhong Road No. 191 Building No. 7 Applicant after: Shanghai instrument and meter for automation company limited Address before: Zhabei District Shanghai City 200072 West Guangzhong Road No. 191 Building No. 7 Applicant before: Shanghai Automatic Industrument and Meter Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140402 |