CN216978170U - Temperature sensor circuit structure - Google Patents
Temperature sensor circuit structure Download PDFInfo
- Publication number
- CN216978170U CN216978170U CN202220146895.XU CN202220146895U CN216978170U CN 216978170 U CN216978170 U CN 216978170U CN 202220146895 U CN202220146895 U CN 202220146895U CN 216978170 U CN216978170 U CN 216978170U
- Authority
- CN
- China
- Prior art keywords
- signal
- voltage
- alarm
- temperature
- sensing element
- 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.)
- Active
Links
Images
Abstract
The application provides a temperature sensor circuit structure, which belongs to the technical field of sensors and particularly comprises an integrated temperature sensing element, a signal processing module and an alarm module, wherein the integrated temperature sensing element is used for detecting the external temperature and outputting a resistance signal in direct proportion to the external temperature; the signal processing module is connected with the integrated temperature sensing element and used for converting the resistance signal into an analog voltage signal to be output; the alarm module is connected with the integrated temperature sensing element and the signal processing module and used for detecting the temperature of the integrated temperature sensing element and outputting an alarm signal through the signal processing module when the temperature exceeds an alarm value. Through the processing scheme of the application, not only can the accurate output of temperature signal be realized, but also the temperature alarm and self-detection capabilities are provided, and the quick fault location of the temperature sensor can be realized.
Description
Technical Field
The application relates to the technical field of sensors, in particular to a temperature sensor circuit structure.
Background
The temperature sensor is a sensor capable of sensing temperature and converting the sensed temperature into a usable output signal, is a core part of a temperature measuring instrument, and is widely applied to the fields of aerospace, automotive electronics, ships and the like. The temperature sensors applied in a large amount at present only have the transmission function of temperature signals, the signal processing of the temperature sensors depends on a rear-end acquisition circuit and has no self-detection function, when the temperature signals are abnormal, the sensors cannot be quickly positioned and can only be disassembled or scrapped, and the temperature sensors are not intelligent enough.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a temperature sensor circuit structure, which not only can realize accurate output of a temperature signal, but also has temperature alarm and self-detection capabilities, and can realize quick fault location of a temperature sensor.
The embodiment of the application provides a temperature sensor circuit structure, which comprises an integrated temperature sensing element, a signal processing module and an alarm module,
the integrated temperature sensing element is used for detecting the external temperature and outputting a resistance signal in direct proportion to the external temperature;
the signal processing module is connected with the integrated temperature sensing element and used for converting the resistance signal into an analog voltage signal to be output;
the alarm module is connected with the integrated temperature sensing element and the signal processing module and used for detecting the temperature of the integrated temperature sensing element and outputting an alarm signal through the signal processing module when the temperature exceeds an alarm value.
According to a specific implementation manner of the embodiment of the application, a load resistor is arranged between the signal processing module and the integrated temperature sensing element, and the load resistor is used for converting the resistance signal into a voltage signal and outputting the voltage signal to the signal processing module.
According to a specific implementation manner of the embodiment of the application, the signal processing module comprises a signal comparison amplifying circuit and a disconnecting switch,
the signal comparison amplifying circuit is connected with the load resistor and is used for receiving the voltage signal, amplifying the voltage signal and outputting an analog voltage signal;
the isolating switch is connected with the alarm module and the signal comparison amplifying circuit and is used for outputting an alarm signal isolated from the signal comparison amplifying circuit when the temperature detected by the alarm module exceeds an alarm value.
According to a concrete implementation mode of the embodiment of the application, the temperature sensor circuit structure further comprises a self-detection switch, the self-detection switch is set to be in a short circuit with a grounding end in the signal comparison amplifying circuit through an external means so as to simulate the fault of the temperature sensor, if an alarm signal is output, the temperature sensor normally works, and if the alarm signal is not output, the fault of the temperature sensor is represented.
According to a specific implementation manner of the embodiment of the application, the temperature sensor circuit structure further comprises an isolation power supply module, an input end of the isolation power supply module is connected with an external power supply, an output end of the isolation power supply module is respectively connected with the integrated temperature sensing element and the signal processing module, the isolation power supply module converts voltage output by the external power supply into a first voltage and a second voltage isolated from the external power supply, the first voltage is supplied to the integrated temperature sensing element, and the second voltage is supplied to the signal processing module.
According to a specific implementation manner of the embodiment of the application, the first voltage is a 6V DC reference voltage, and the second voltage is a ± 12V DC voltage.
According to a specific implementation manner of the embodiment of the application, the voltage range of the analog voltage signal is 0-6V.
According to a specific implementation manner of the embodiment of the application, a filter is arranged between the external power supply and the isolation power supply module.
According to a specific implementation manner of the embodiment of the application, the alarm module comprises a potentiometer, and the alarm value is set through the potentiometer.
According to a specific implementation manner of the embodiment of the present application, the integrated temperature sensing element is AD 590M.
Advantageous effects
The temperature sensor circuit structure in the embodiment of the application can realize the self-detection and alarm functions of the temperature sensor and can assist in quick fault location and elimination of the temperature sensor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a temperature sensor circuit configuration according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a circuit structure of a temperature sensor according to an embodiment of the utility model.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiments of the present application provide a temperature sensor circuit structure, which is described in detail below with reference to fig. 1-2.
Referring to fig. 1 and 2, the temperature sensor circuit structure of the present embodiment includes an integrated temperature sensing element N2, a signal processing module N3 and an alarm module, where the integrated temperature sensing element N2 is configured to detect an external temperature and output a resistance signal proportional to the external temperature; the signal processing module N3 is connected with the integrated temperature sensing element N2 and is used for converting the resistance signal into an analog voltage signal to be output; the alarm module is connected with the integrated temperature sensing element N2 and the signal processing module N3, and is used for detecting the temperature of the integrated temperature sensing element N2 and outputting an alarm signal through the signal processing module N3 when the temperature exceeds an alarm value.
A load resistor is further arranged between the integrated temperature sensing element N2 and the signal processing module N3, and the load resistor is used for converting a resistance signal output by the integrated temperature sensing element N2 into a voltage signal and outputting the voltage signal to the signal processing module N3. Specifically, the load resistor is composed of a constant value resistor R1, a constant value resistor R3, a constant value resistor R4, a constant value resistor R7 and a potentiometer R2, the integrated temperature sensing element N2 senses the external temperature to give a resistance signal proportional to the temperature, the resistance signal is converted into a voltage signal through the load resistor composed of the constant value resistors R1, R3, R4, R7 and the potentiometer R2 in fig. 2 and is transmitted to the signal processing module N3, and the voltage signal is amplified and then an analog voltage signal of 0-6V is output (V in the signal processing module N3 in fig. 2 is a V voltage signal (V in the signal processing module N3 in fig. 2)0)。
The above embodiment further includes an isolation power module N1, an input end of the isolation power module N1 is connected to an external power supply, an output end of the isolation power module N1 is connected to the integrated temperature sensing element N2 and the signal processing module N3, the isolation power module N1 converts a 28V working voltage output by the external power supply into a first voltage and a second voltage isolated from the external power supply, the first voltage is supplied to the integrated temperature sensing element N2, the second voltage is supplied to the signal processing module N3, where the first voltage is a 6V DC reference voltage, and the second voltage is a ± 12V DC voltage.
Specifically, the signal processing module N3 includes a signal comparing and amplifying circuit and an isolating switch. The signal comparing and amplifying circuit is used for receiving the voltage signal, amplifying the voltage signal and outputting an analog voltage signal, namely, the voltage signal passes through V in FIG. 20Outputting a temperature signal; the isolating switch is connected with the alarm module and the signal comparison amplifying circuit and is used for outputting an alarm signal (on) isolated from both the isolation power supply module N1 and the signal comparison amplifying circuit when the temperature detected by the alarm module exceeds an alarm valueOff signal).
Referring to fig. 2, the alarm module includes a set potentiometer R6, and an alarm voltage value is set through a potentiometer R6 (V in the signal processing module N3 of fig. 2K) When the temperature exceeds the alarm voltage value, two groups of switch signals isolated from the isolation power supply module N1 and the signal comparison amplifying circuit are output (K in the signal processing module N3 in figure 2)1And K2)。
Preferably, the temperature sensor circuit structure further comprises a self-detection switch, wherein the self-detection switch is set to be in short circuit with a ground terminal through an external means to simulate the temperature sensor fault, if an alarm signal is output, the temperature sensor normally works, and if the alarm signal is not output, the temperature sensor fault is indicated. For example, a test is performed through a potentiometer R6, and when the self-detection point is short-circuited with the negative electrode of the analog voltage signal, the test is used to determine whether the temperature sensor circuit operates normally, for example, two sets of switch circuits K1 and K2 are respectively turned on, which indicates that the circuit operates substantially normally.
Preferably, a filter (Z1 and Z2 in fig. 2) is arranged between the external power supply and the isolation power supply module N1, and the 28V DC working power supply is filtered by the filter, and then converted into a 6V DC reference voltage and a ± 12V DC voltage isolated from the external power supply by the isolation power supply module N1, and respectively supplied to the integrated temperature sensing element N2 and the signal processing module N3.
In one embodiment, the integrated temperature sensing element is AD590M, and AD590M is a monolithic two-terminal temperature-sensitive current source, the output current of which is proportional to absolute temperature, and the device can act as a high-impedance, constant-current regulator in the range of 4V to 30V supply voltage. It is suitable for any temperature sensing application below 150 ℃ using conventional electrical temperature sensors. The low cost of a single chip integrated circuit and the absence of supporting circuitry make it a preferred solution for many temperature measurement applications.
The temperature sensor circuit structure with the self-detection and alarm functions, provided by the utility model, not only can realize accurate output of temperature signals, but also has the temperature alarm and self-detection capabilities, and can realize quick fault location of the temperature sensor.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A temperature sensor circuit structure is characterized by comprising an integrated temperature sensing element, a signal processing module and an alarm module,
the integrated temperature sensing element is used for detecting the external temperature and outputting a resistance signal in direct proportion to the external temperature;
the signal processing module is connected with the integrated temperature sensing element and used for converting the resistance signal into an analog voltage signal to be output;
the alarm module is connected with the integrated temperature sensing element and the signal processing module and used for detecting the temperature of the integrated temperature sensing element and outputting an alarm signal through the signal processing module when the temperature exceeds an alarm value.
2. The circuit structure of claim 1, wherein a load resistor is disposed between the signal processing module and the integrated temperature sensing element, and the load resistor is configured to convert the resistance signal into a voltage signal and output the voltage signal to the signal processing module.
3. The circuit structure of claim 2, wherein the signal processing module comprises a signal comparison amplifying circuit and a disconnecting switch,
the signal comparison amplifying circuit is connected with the load resistor and is used for receiving the voltage signal, amplifying the voltage signal and outputting an analog voltage signal;
the isolating switch is connected with the alarm module and the signal comparison amplifying circuit and is used for outputting an alarm signal isolated from the signal comparison amplifying circuit when the temperature detected by the alarm module exceeds an alarm value.
4. The temperature sensor circuit arrangement of claim 3, further comprising a self-test switch configured to short-circuit a voltage output terminal and a ground terminal of the signal comparison and amplification circuit by external means to simulate a temperature sensor fault, wherein the output of the alarm signal indicates that the temperature sensor is operating normally, and the output of the alarm signal indicates that the temperature sensor is not operating normally.
5. The temperature sensor circuit arrangement of claim 1, further comprising an isolation power module having an input connected to an external power source and an output connected to the integrated temperature sensing element and the signal processing module, respectively, wherein the isolation power module converts a voltage output by the external power source into a first voltage and a second voltage isolated from the external power source, the first voltage being supplied to the integrated temperature sensing element, and the second voltage being supplied to the signal processing module.
6. The temperature sensor circuit arrangement of claim 5, wherein the first voltage is a 6V DC voltage and the second voltage is a ± 12V DC voltage.
7. The temperature sensor circuit arrangement of claim 6, wherein the analog voltage signal has a voltage range of 0-6V.
8. The temperature sensor circuit arrangement of claim 5, wherein a filter is provided between the external power supply and the isolated power supply module.
9. The temperature sensor circuit arrangement according to claim 1, characterized in that the alarm module comprises a potentiometer by means of which the alarm value is set.
10. The temperature sensor circuit structure of any one of claims 1-9, wherein the integrated temperature sensing element is AD 590M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220146895.XU CN216978170U (en) | 2022-01-19 | 2022-01-19 | Temperature sensor circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220146895.XU CN216978170U (en) | 2022-01-19 | 2022-01-19 | Temperature sensor circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216978170U true CN216978170U (en) | 2022-07-15 |
Family
ID=82351764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220146895.XU Active CN216978170U (en) | 2022-01-19 | 2022-01-19 | Temperature sensor circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216978170U (en) |
-
2022
- 2022-01-19 CN CN202220146895.XU patent/CN216978170U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4241787B2 (en) | Total battery voltage detection and leak detection device | |
| US20030155930A1 (en) | Current measuring circuit suited for batteries | |
| CN203241165U (en) | Thermal resistor temperature measurement circuit based on three-wire system | |
| JP2005532538A (en) | Cell buffer with built-in test | |
| CN112697343B (en) | Detection circuit and method of resistance bridge type pressure sensor, electronic equipment and chip | |
| CN216978170U (en) | Temperature sensor circuit structure | |
| CN209590068U (en) | Constant current source power supply system | |
| CN217443440U (en) | Current acquisition circuit and device | |
| CN208334490U (en) | A kind of micro-current Precision measurement circuit | |
| CN212988630U (en) | Temperature acquisition circuit, control panel and electrical equipment | |
| US8143881B2 (en) | Current measuring apparatus for power supply | |
| JPS6325572A (en) | Leakage current measuring system of electrometer amplifier | |
| CN113791277A (en) | Insulation resistance detection device and forklift | |
| US4103231A (en) | Electrometric apparatus | |
| CN110441699B (en) | Battery voltage detection circuit and battery voltage detection device | |
| CN214473582U (en) | Milliampere-level current detection circuit, detection card and device based on operational amplifier | |
| CN113820029A (en) | PT100 temperature acquisition circuit for acquisition terminal | |
| CN213364866U (en) | Current detection circuit | |
| CN212988631U (en) | Temperature acquisition circuit, control panel and electrical equipment | |
| CN113252988B (en) | Handheld parameter tester and parameter testing method | |
| CN218298360U (en) | High-potential side current sampling circuit structure for direct-current power supply output | |
| CN218002731U (en) | PT100 temperature signal transmitting circuit | |
| CN112198368B (en) | Electric automobile insulation resistance detection circuit and method | |
| CN217179827U (en) | Conversion circuit of pressure sensor chip measuring range, pressure sensor and chip thereof | |
| CN219266409U (en) | Four-electrode conductivity value detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |