Temperature sensor detection device

Abstract

The utility model discloses a temperature sensor detection device, and relates to the technical field of automobile detection, and the temperature sensor detection device comprises a temperature adjustment module which is arranged in a system environment where a temperature sensor of a warm air and air conditioning system of a vehicle is located, and is used for adjusting the environment temperature of the system environment according to a received temperature control signal; and the impedance detection module is connected with the temperature sensor and is used for detecting the internal resistance of the temperature sensor at different environment temperatures. The internal resistance of the temperature sensor is detected in a system environment with stable temperature, the influence of unstable environment temperature on the internal resistance detection result is avoided, the technical problem of how to accurately detect the internal resistance of the related temperature sensor in the warm air and air conditioning system is solved, and the detection accuracy of the temperature sensor is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile detection technology, and in particular to a temperature sensor detection device. Background Art

[0002] In the related art, a failure of a temperature sensor in a vehicle's heating and air conditioning system will cause a failure of the heating and air conditioning system. By detecting the internal resistance of the temperature sensor and comparing the detected internal resistance value with the internal resistance specification range, it is possible to determine whether the temperature sensor is faulty and implement troubleshooting of the heating and air conditioning system. However, the ambient temperature of the temperature sensor in the heating and air conditioning system is unstable, which will affect the internal resistance detection result of the temperature sensor. Therefore, the problem of how to accurately detect the internal resistance of the temperature sensor in the heating and air conditioning system needs to be solved urgently. Utility Model Content

[0003] The main purpose of this application is to propose a temperature sensor detection device, which aims to solve the technical problem of how to accurately detect the internal resistance of relevant temperature sensors in heating and air conditioning systems.

[0004] To achieve the above-mentioned purpose, the temperature sensor detection device proposed in the present application comprises:

[0005] A temperature adjustment module, which is arranged in a system environment where a temperature sensor of a heating and air conditioning system of the vehicle is located, and is used to adjust an ambient temperature of the system environment according to a received temperature control signal;

[0006] The impedance detection module is connected to the temperature sensor and is used to detect the internal resistance of the temperature sensor at different ambient temperatures.

[0007] In one embodiment, the temperature sensor detection device further comprises:

[0008] The interface module is connected to the impedance detection module and is used to connect the temperature sensor.

[0009] In one embodiment, the interface module and the temperature adjustment module are both disposed in a box, and the box is disposed in the system environment.

[0010] In one embodiment, the interface module comprises at least one temperature sensor interface.

[0011] In one embodiment, the temperature sensor detection device further comprises:

[0012] The first switch module is connected to the interface module and the impedance detection module respectively, and is used to connect or disconnect the interface module and the impedance detection module according to a received first switch control signal.

[0013] In one embodiment, the first switch module includes at least one first switch device;

[0014] A temperature sensor interface is connected to the impedance detection module through a first switch device.

[0015] In one embodiment, the temperature sensor detection device further comprises:

[0016] The temperature acquisition module is set in the system environment to detect the real-time ambient temperature of the system environment and output the real-time ambient temperature.

[0017] In one embodiment, the temperature sensor detection device includes a second switch module;

[0018] The second switch module is connected to the power supply and the temperature adjustment module respectively, and is used to connect or disconnect the power supply and the temperature adjustment module according to the received second switch control signal.

[0019] In one embodiment, the temperature sensor detection device further comprises:

[0020] The status indication module is connected to the power supply and the temperature adjustment module respectively, and is used to indicate the working status of the temperature adjustment module.

[0021] In one embodiment, the impedance detection module includes a multimeter.

[0022] One or more technical solutions proposed in this application have at least the following technical effects:

[0023] The technical solution of the present application is to set a temperature adjustment module in the system environment where the temperature sensor of the vehicle heating and air-conditioning system is located, and adjust the ambient temperature of the system environment. When the ambient temperature of the system environment where the temperature sensor is located is in a stable state, the internal resistance of the temperature sensor is detected by the impedance detection module, thereby detecting the internal resistance of the temperature sensor in the system environment with stable temperature, avoiding the influence of unstable ambient temperature on the internal resistance detection result, and improving the accuracy of temperature sensor detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of an embodiment of a temperature sensor detection device provided by the present application;

[0026] Figure 2A schematic diagram of the structure of another embodiment of the temperature sensor detection device provided by the present application;

[0027] Figure 3 An exemplary internal resistance specification curve of a water temperature sensor provided in the present application;

[0028] Figure 4 An exemplary internal resistance specification curve of a front evaporator temperature sensor provided in the present application;

[0029] Figure 5 An exemplary internal resistance specification curve of an exhaust temperature sensor provided in the present application;

[0030] Figure 6 An exemplary internal resistance specification curve of an in-vehicle and ambient temperature sensor provided by the present application;

[0031] Figure 7 This is a circuit schematic diagram of an embodiment of a temperature sensor detection device provided in this application.

[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] It should be noted that in the present invention, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a device or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a device or system. In the absence of more restrictions, an element defined by the sentence "includes..." does not exclude the existence of other identical elements in the device or system including the element.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, if there are descriptions involving "first", "second", etc., the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0037] In the present utility model, the use of suffixes such as "module", "component" or "unit" to represent elements is only to facilitate the description of the present utility model, and has no specific meaning in itself. Therefore, "module", "component" or "unit" can be used in a mixed manner. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] In order to solve the technical problem of how to accurately detect the internal resistance of relevant temperature sensors in heating and air conditioning systems, the present application proposes a temperature sensor detection device.

[0039] See also Figures 1 to 7 In one embodiment of the present application, the temperature sensor detection device may include:

[0040] A temperature adjustment module, which is arranged in a system environment where a temperature sensor of a heating and air conditioning system of the vehicle is located, and is used to adjust an ambient temperature of the system environment according to a received temperature control signal;

[0041] The impedance detection module is connected to the temperature sensor and is used to detect the internal resistance of the temperature sensor at different ambient temperatures.

[0042] It should be noted that if Figure 2As shown, the heating and air conditioning system may include temperature sensors such as the water temperature sensor T1, the front evaporator temperature sensor T2, the exhaust temperature sensor T3, and the in-vehicle and ambient temperature sensor T4 of the heating and air conditioning system. When monitoring different temperature sensors, the temperature adjustment module may be set in the system environment where the temperature sensor to be detected is located, or the temperature adjustment module may also be set in the system environment where all temperature sensors are located. In specific implementation, the specific position of the temperature adjustment module is set according to actual detection requirements. Among them, the temperature adjustment module may include a heater / cooler U1, and the ambient temperature of the system environment may be adjusted by heating or cooling the heater / cooler U1 according to the temperature control signal.

[0043] It is understandable that the temperature sensor detection device may also include a main control module, which may generate a temperature control signal according to the real-time ambient temperature to control the temperature adjustment module. Alternatively, the ambient temperature of the system environment may be adjusted by manually controlling the temperature adjustment module, in which case the temperature control signal is a manual control signal.

[0044] The impedance detection module can detect the internal resistance of the temperature sensor at different ambient temperatures and obtain different internal resistance values. By comparing the internal resistance values ​​at different ambient temperatures with the internal resistance specification range, it can be determined whether there is any abnormality in the temperature sensor.

[0045] It is understandable that, for any temperature sensor, the main control module can pre-store the internal resistance specification range of different temperature sensors, and the impedance detection module can output the detected internal resistance values ​​at different ambient temperatures to the main control module, so that the main control module can compare the internal resistance values ​​at different ambient temperatures with the internal resistance specification range to determine whether the temperature sensor is abnormal. Or, for any temperature sensor, the impedance detection module can also output the detected internal resistance values ​​at different ambient temperatures to the detection personnel, so that the detection personnel can manually compare the internal resistance values ​​at different ambient temperatures with the internal resistance specification range to determine whether the temperature sensor is abnormal. In specific implementation, the internal resistance specification range is determined according to the specifications of the temperature sensor actually used.

[0046] In one example, the internal resistance specification range of the water temperature sensor of the vehicle's heating and air conditioning system is as follows: Figure 3 As shown in the figure, L1 is the upper limit curve of the internal resistance specification of the water temperature sensor at different ambient temperatures, and L2 is the lower limit curve of the internal resistance specification of the water temperature sensor at different ambient temperatures; the internal resistance specification range of the front evaporator temperature sensor of the vehicle's heating and air conditioning system is as follows Figure 4 As shown in the figure, L3 is the upper limit curve of the internal resistance specification of the front evaporator temperature sensor at different ambient temperatures, and L4 is the lower limit curve of the internal resistance specification of the front evaporator temperature sensor at different ambient temperatures; the internal resistance specification range of the exhaust temperature sensor of the vehicle's heating and air conditioning system is as follows Figure 5As shown in the figure, L5 is the upper limit curve of the internal resistance specification of the exhaust temperature sensor at different ambient temperatures, and L6 is the lower limit curve of the internal resistance specification of the exhaust temperature sensor at different ambient temperatures; the internal resistance specification range of the interior and ambient temperature sensors of the vehicle's heating and air conditioning system is as follows Figure 6 As shown, L7 is the upper limit curve of the internal resistance specification of the in-vehicle and ambient temperature sensors at different ambient temperatures, and L8 is the lower limit curve of the internal resistance specification of the in-vehicle and ambient temperature sensors at different ambient temperatures.

[0047] Therefore, this embodiment sets a temperature adjustment module in the system environment where the temperature sensor of the vehicle heating and air-conditioning system is located, and adjusts the ambient temperature of the system environment. When the ambient temperature of the system environment where the temperature sensor is located is in a stable state, the internal resistance of the temperature sensor is detected by the impedance detection module, thereby detecting the internal resistance of the temperature sensor in the system environment with stable temperature, avoiding the influence of unstable ambient temperature on the internal resistance detection result, and improving the accuracy of temperature sensor detection.

[0048] In a possible implementation, Figure 2 As shown, the impedance detection module may include a multimeter OHM.

[0049] It should be noted that when the impedance detection module is a multimeter OHM, the multimeter OHM can display the internal resistance value of the temperature sensor at different ambient temperatures. At this time, by manually comparing the internal resistance value at different ambient temperatures with the internal resistance specification range, it is determined whether the temperature sensor has an abnormality.

[0050] In a feasible implementation manner, the temperature sensor detection device further includes:

[0051] The temperature acquisition module is set in the system environment to detect the real-time ambient temperature of the system environment and output the real-time ambient temperature.

[0052] It should be noted that the temperature acquisition module can output the detected real-time ambient temperature to the main control module, or display the detected real-time ambient temperature to the tester. The main control module or the tester can determine whether the real-time ambient temperature reaches the actual required ambient temperature, and control the temperature adjustment module according to the determination result.

[0053] When the real-time ambient temperature is output to the main control module, the temperature acquisition module may be a temperature detection circuit. When the real-time ambient temperature is displayed to the detection personnel, the temperature acquisition module may include a temperature acquisition device with a display function such as a thermometer or a temperature detector, for example. Figure 2 As shown, the temperature acquisition module may include a thermometer TM.

[0054] In a feasible implementation manner, the temperature sensor detection device further includes:

[0055] The interface module is connected to the impedance detection module and is used to connect the temperature sensor.

[0056] It should be noted that the temperature sensor detection device can be connected to the temperature sensors of the heating and air-conditioning system when a fault occurs in the vehicle's heating and air-conditioning system. Therefore, when performing temperature sensor detection, the multimeter and the temperature sensors can be quickly connected or disconnected through the interface module. Compared with directly connecting the multimeter to the temperature sensor through wires, damage to the temperature sensor terminals can be reduced.

[0057] In one possible implementation, the interface module includes at least one temperature sensor interface.

[0058] It should be noted that since the heating and air conditioning system includes multiple types of temperature sensors, different temperature sensors have different terminal types. Therefore, different types of temperature sensor interfaces need to be set in the interface module to connect different temperature sensors. When used specifically, the type and number of temperature sensor interfaces are set according to actual detection requirements. Preferably, the temperature sensor interface can be a connection terminal corresponding to each temperature sensor.

[0059] In an example, Figure 7 As shown, since the heating and air-conditioning system includes a water temperature sensor T1, a front evaporator temperature sensor T2, an exhaust temperature sensor T3 and an in-vehicle and ambient temperature sensor T4 of the heating and air-conditioning system, the corresponding temperature sensor interfaces may include a temperature sensor interface J1, a temperature sensor interface J2, a temperature sensor interface J3 and a temperature sensor interface J4.

[0060] In a feasible implementation manner, the interface module and the temperature adjustment module are both disposed in a box, and the box is disposed in the system environment.

[0061] It should be noted that the temperature sensor detection device also includes a box body, and each temperature sensor interface and the heater / cooler are arranged in the box body. In addition, the temperature acquisition module is also arranged in the box body to detect the temperature in the box body.

[0062] When testing the temperature sensor, the box is set in the system environment where the temperature sensor is located, the temperature sensor interface is connected to the corresponding temperature sensor, and the heating / cooling device is controlled according to the temperature in the box detected by the temperature acquisition module, so that the temperature in the box reaches the actual required ambient temperature, and then the internal resistance of the temperature sensor can be detected by a multimeter. The size of the box is set according to the size of each temperature sensor, the size of the heater / cooling device, and the size of at least one temperature sensor interface in actual use.

[0063] This embodiment sets up a box to maintain the temperature inside the box at the actually required ambient temperature, and detects the internal resistance of the temperature sensor inside the box. Compared with not setting up a box, it controls the ambient temperature of the overall environment where the heating / cooling condition temperature sensor is located, and can more quickly adjust the ambient temperature of the system environment where the temperature sensor is located to the actually required ambient temperature, thereby improving the detection efficiency of the temperature sensor.

[0064] In a feasible implementation manner, the temperature sensor detection device further includes:

[0065] The first switch module is connected to the interface module and the impedance detection module respectively, and is used to connect or disconnect the interface module and the impedance detection module according to a received first switch control signal.

[0066] It should be noted that the first switch module can be turned on when a temperature sensor is connected to the interface module, connecting the interface module with the impedance detection module, and turned on when no temperature sensor is connected to the interface module, disconnecting the interface module from the impedance detection module, thereby improving the reliability of the temperature sensor detection device.

[0067] It can be understood that the main control module can be connected to the interface module and the first switch module, detect whether there are temperature sensors connected to each temperature sensor interface of the interface module, output the corresponding first switch control signal, control the on and off state of the first switch module, and control the first switch module to connect or disconnect the temperature sensor interface and the impedance detection module.

[0068] In addition, the first switch control signal may also be a manual switch control signal, and the detection personnel may control the on-off state of the first switch module, and may also control the first switch module to connect or disconnect the temperature sensor interface and the impedance detection module.

[0069] The first switch module may be implemented by different switch devices, and the switch device may include a switch device with a pair of contacts or a switch device with multiple pairs of contacts, which may be selected according to actual use requirements.

[0070] In a feasible implementation, the first switch module includes at least one first switch device;

[0071] A temperature sensor interface is connected to the impedance detection module through a first switch device.

[0072] It should be noted that when the switch device in the first switch module is implemented as a first switch device with a pair of contacts, the number of the first switch devices is the same as the number of the temperature sensor interfaces, and different first switch devices are used to connect or disconnect the corresponding temperature sensor interfaces and the impedance detection module. The first switch device can be a manual switch or an automatic switch, etc., which is selected according to actual use requirements. Preferably, the first switch device is a manual switch.

[0073] In an example, Figure 7 As shown, since the temperature sensor interface may include temperature sensor interface J1, temperature sensor interface J2, temperature sensor interface J3 and temperature sensor interface J4, the corresponding first switch devices may include switch device S2, switch device S3, switch device S4 and switch device S5.

[0074] In a feasible implementation, the temperature sensor detection device includes a second switch module;

[0075] The second switch module is connected to the power supply and the temperature adjustment module respectively, and is used to connect or disconnect the power supply and the temperature adjustment module according to the received second switch control signal.

[0076] It should be noted that if Figure 7 As shown, the power supply may include a DC power supply E for supplying power to the temperature adjustment module. The second switch module may connect the power supply and the temperature adjustment module when the ambient temperature needs to be adjusted, and disconnect the power supply and the temperature adjustment module when the ambient temperature does not need to be adjusted, thereby saving power supply energy and improving the reliability of the temperature sensor detection device. The power supply and the second switch module may also be disposed in the above-mentioned box.

[0077] It is understandable that the main control module can be connected to the second switch module, output the second switch control signal, and control the on-off state of the second switch module. Or the second switch control signal can also be a manual switch control signal, and the on-off state of the second switch module can be controlled by the detection personnel, and the second switch module can also be controlled to connect or disconnect the power supply and the temperature adjustment module.

[0078] The second switch module may include a second switch device S1, and the second switch device may be a manual switch or an automatic switch, etc., which is selected according to actual use requirements. Preferably, the second switch device is a manual switch.

[0079] In a feasible implementation manner, the temperature sensor detection device further includes:

[0080] The status indication module is connected to the power supply and the temperature adjustment module respectively, and is used to indicate the working status of the temperature adjustment module.

[0081] It should be noted that if Figure 7 As shown, the status indication module may include a working indicator light L, which may light up when the temperature adjustment module is powered on and go out when the temperature adjustment module is powered off, to indicate the working status of the temperature adjustment module.

[0082] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A temperature sensor detection device, characterized in that: The temperature sensor detection device comprises: A temperature adjustment module, which is arranged in a system environment where a temperature sensor of a heating and air conditioning system of the vehicle is located, and is used to adjust the ambient temperature of the system environment according to a received temperature control signal; The impedance detection module is connected to the temperature sensor and is used to detect the internal resistance of the temperature sensor at different ambient temperatures.

2. The temperature sensor detection device according to claim 1, characterized in that: The temperature sensor detection device also includes: An interface module is connected to the impedance detection module and is used to connect to the temperature sensor.

3. The temperature sensor detection device according to claim 2, characterized in that: The interface module and the temperature adjustment module are both arranged in a box, and the box is arranged in the system environment.

4. The temperature sensor detection device according to claim 2, characterized in that: The interface module includes at least one temperature sensor interface.

5. The temperature sensor detection device according to claim 4, characterized in that: The temperature sensor detection device also includes: The first switch module is connected to the interface module and the impedance detection module respectively, and is used to connect or disconnect the interface module and the impedance detection module according to a received first switch control signal.

6. The temperature sensor detection device according to claim 5, characterized in that: The first switch module includes at least one first switch device; One of the temperature sensor interfaces is connected to the impedance detection module through one of the first switch devices.

7. The temperature sensor detection device according to claim 1, characterized in that: The temperature sensor detection device also includes: The temperature acquisition module is arranged in the system environment, and is used to detect the real-time ambient temperature of the system environment and output the real-time ambient temperature.

8. The temperature sensor detection device according to claim 1, characterized in that: The temperature sensor detection device includes a second switch module; The second switch module is connected to the power supply and the temperature adjustment module respectively, and is used to connect or disconnect the power supply and the temperature adjustment module according to a received second switch control signal.

9. The temperature sensor detection device according to claim 8, characterized in that: The temperature sensor detection device also includes: The status indication module is connected to the power supply and the temperature adjustment module respectively, and is used to indicate the working status of the temperature adjustment module.

10. The temperature sensor detection device according to claim 1, characterized in that: The impedance detection module includes a multimeter.

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