Temperature sensor inspection device

Abstract

The utility model provides a temperature sensor inspection device, which is provided with a stepped temperature control temperature generating box capable of having linear temperature difference along the direction of a conveying channel, and a conveying belt type conveying mechanism arranged in a penetrating manner along the temperature gradient direction of the temperature generating box, a to-be-detected temperature sensor mounting seat and a standard temperature sensor mounting seat are arranged on a conveying belt of the conveying belt type conveying mechanism, and after the temperature of the temperature generating box is set, the temperature distribution in the temperature generating box does not need to be changed for the detection requirements of various batches of to-be-detected temperature sensors with the same working temperature range, so that the detection efficiency is improved. The to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat are loaded and unloaded, so that the test can be continuously carried out. According to the temperature sensor inspection device provided by the utility model, the temperature generation box does not need to be opened during inspection, the inspection efficiency can be improved, meanwhile, the temperature condition of the temperature generation box does not need to be specially changed, the energy consumption of the temperature generation box can be effectively reduced, and the inspection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor inspection, in particular to a temperature sensor inspection device. Background Art

[0002] A temperature sensor refers to a sensor that can sense temperature and convert it into an available output signal, and temperature sensors are widely used in all walks of life.

[0003] Temperature sensors usually have the advantages of small size and high sensitivity. However, due to their small size and high sensitivity, their actual temperature response characteristics are more easily affected by process deviations in actual production. Therefore, before leaving the factory, it is necessary to inspect the actual temperature response characteristics of temperature sensors to calibrate their specific performance, and screen out temperature sensors whose temperature response characteristics do not meet the technical requirements to ensure the quality of the products leaving the factory.

[0004] In the prior art, generally, the temperature sensor to be tested and the standard temperature sensor are fixedly arranged close to each other in a temperature generating box. The temperature in the temperature generating box is adjusted according to the operating temperature range of the temperature sensor to be tested, and the temperature sensing values of the temperature sensor to be tested and the standard temperature sensor are collected to obtain the relationship between the sensed temperature of the temperature sensor to be tested and the ambient temperature, and then to judge whether its temperature response characteristics are qualified. Among them, when testing the next group of temperature sensors, it is necessary to adjust the temperature in the temperature generating box to change within the operating temperature range again. However, the temperature adjustment of the temperature generating box has high energy consumption and long time consumption for completing the temperature adjustment, resulting in high inspection cost and low efficiency in the prior art. Summary of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a temperature sensor inspection device to solve the problems of high cost and low efficiency in the temperature sensor inspection method in the prior art.

[0006] The utility model provides a temperature sensor inspection device, including: a temperature generating box, a conveying module and an inspection control module, wherein,

[0007] A conveying channel is arranged in the temperature generating box, the conveying module is arranged through the conveying channel, and the temperature generating box is a stepped temperature control temperature generating box that can have a linear temperature difference along the direction of the conveying channel;

[0008] The conveying module includes a conveyor belt type conveying mechanism. On the conveyor belt of the conveyor belt type conveying mechanism, there are an installation seat for the temperature sensor to be measured and an installation seat for the standard temperature sensor. Communication ports connected to the communication pins of the corresponding sensors are also provided on the installation seat for the temperature sensor to be measured and the installation seat for the standard temperature sensor. The communication ports are communicatively connected to the inspection control module, and the conveying module is communicatively connected to the inspection control module.

[0009] Optionally, the inspection control module includes: a host computer, a communication module, and a data acquisition module. Among them,

[0010] The data acquisition module is connected to the communication module, as well as the communication ports of the installation seat for the temperature sensor to be measured and the installation seat for the standard temperature sensor;

[0011] The communication module is communicatively connected to the drive motor of the conveyor belt type conveying mechanism, the host computer, and the temperature generating box.

[0012] Optionally, the host computer includes a speed setting unit, a temperature setting unit, and a data analysis unit. The speed setting unit is communicatively connected to the drive motor of the conveyor belt type conveying mechanism through the communication module. The temperature setting unit is communicatively connected to the temperature generating box through the communication module. The data analysis unit is communicatively connected to the data acquisition module through the communication module.

[0013] Optionally, the drive motor is a bidirectional rotatable motor.

[0014] Optionally, the conveying module further includes a linear slide. The conveyor belt is arranged above the linear slide. Linear brush conductive sheets are provided on the linear slide. A plurality of linear brush conductive sheets are arranged in electrical isolation side by side. The linear brush conductive sheets are communicatively connected to the inspection control module. Brush heads are connected to the communication ports on the installation seat for the temperature sensor to be measured and the installation seat for the standard temperature sensor, and are correspondingly coupled to the linear brush conductive sheets through the brush heads.

[0015] Optionally, the installation seat for the temperature sensor to be measured and the installation seat for the standard temperature sensor are arranged side by side as a group, and multiple groups are arranged along the conveyor belt of the conveyor belt type conveying mechanism.

[0016] Optionally, the linear brush conductive sheets are arranged at intervals in the extending direction of the linear slide, and each section is communicatively connected to the inspection control module respectively.

[0017] Optionally, hot-swap connection terminals are provided on the installation seat for the temperature sensor to be measured and the installation seat for the standard temperature sensor, so as to perform hot-swap connection with the corresponding sensors through the hot-swap connection terminals.

[0018] Optionally, the data analysis unit includes an oscilloscope.

[0019] The temperature sensor inspection device provided by the present utility model includes: a temperature generating box, a conveying module, and an inspection control module. Among them, a conveying channel is provided in the temperature generating box, the conveying module is disposed through the conveying channel, and the temperature generating box is a stepped temperature control temperature generating box that can have a linear temperature difference along the direction of the conveying channel; the conveying module includes a conveyor belt type conveying mechanism, and a to-be-tested temperature sensor mounting seat and a standard temperature sensor mounting seat are provided on the conveyor belt of the conveyor belt type conveying mechanism. Communication ports connected to the communication pins of the corresponding sensors are further provided on the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat, and the communication ports are communicatively connected to the inspection control module, and the conveying module is communicatively connected to the inspection control module. During inspection, according to the operating temperature range of the to-be-tested temperature sensor, the temperature gradient span of the temperature generating box is set, the to-be-tested temperature sensor and the standard temperature sensor are fixedly installed on the corresponding mounting seats, the conveyor belt type conveying mechanism is started, and the to-be-tested temperature sensor and the standard temperature sensor traverse the temperature gradient through the conveying channel of the temperature generating box, and the sensing data of the to-be-tested temperature sensor and the standard temperature sensor can be obtained and transmitted to the inspection control module. The inspection control module can obtain the temperature sensor curve of the to-be-tested temperature sensor and the standard temperature curve according to the sensing data. After comparison, it can effectively detect whether the to-be-tested temperature sensor is qualified. And after setting the temperature of the temperature generating box, for the detection requirements of the next batch of to-be-tested temperature sensors with the same operating temperature range, only the temperature distribution in the temperature generating box needs to be maintained, and the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat are loaded and unloaded, and the inspection can be continuously carried out. There is no need to adjust the temperature in the temperature generating box again, nor to open the temperature generating box, which can reduce the large change in the temperature distribution in the temperature generating box affected by opening the box, and overall can effectively reduce the comprehensive energy consumption of the temperature generating box during inspection. The temperature sensor inspection device provided by the present utility model selects a stepped temperature control temperature generating box with a linear temperature difference, and sets a conveyor belt type conveying mechanism to drive the to-be-tested temperature sensor to sequentially traverse the gradient temperature in the temperature generating box. During inspection, there is no need to open the temperature generating box, which can improve the inspection efficiency. At the same time, there is no need to specially change the temperature condition of the temperature generating box, which can effectively reduce the energy consumption of the temperature generating box and reduce the inspection cost. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the main structure of the temperature sensor inspection device in the present utility model;

[0021] Figure 2 It is a schematic diagram of the brush structure layout of the temperature sensor inspection device in the present utility model;

[0022] Figure 3 This is an actual measurement data curve of the temperature sensor inspection device in the present utility model.

[0023] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixedly arranged on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] To solve the problems of high cost and low efficiency in the existing temperature sensor inspection methods. The present utility model provides a temperature sensor inspection device, which selects a stepped temperature control temperature generating box with a linear temperature difference, sets a conveying channel in the temperature generating box, and sets a conveyor belt type conveying mechanism to drive the temperature sensor to be tested, so that the temperature sensor can move along the conveying channel and sequentially traverse the gradient temperatures in the temperature generating box. During the inspection, there is no need to open the temperature generating box, which can improve the inspection efficiency. At the same time, there is no need to specially change the temperature condition of the temperature generating box, which can effectively reduce the energy consumption of the temperature generating box and reduce the inspection cost.

[0028] Specifically, as Figure 1As shown in the figure, it is a schematic diagram of the main structure of the temperature sensor inspection device in the present utility model. The temperature sensor inspection device in this embodiment includes: a temperature generating box 1, a conveying module, and an inspection control module. The conveying module is mainly used to send the sensor to be tested and the standard sensor into and out of the temperature generating box, so that the sensor to be tested and the standard sensor can sense the temperature in the temperature generating box and provide temperature sensing data. The inspection control module is mainly used to control the working states of the temperature generating box 1 and the conveying module according to the set control parameters, and collect the temperature sensing data of the sensor to be tested and the standard sensor, so as to analyze whether the performance of the sensor to be tested is qualified based on the collected temperature sensing data.

[0029] Specifically, a conveying channel is provided in the temperature generating box 1, and the conveying module is disposed through the conveying channel. Moreover, the temperature generating box 1 is a stepped temperature control temperature generating box that can have a linear temperature difference along the direction of the conveying channel. For example, it is a programmable constant temperature and humidity test chamber of model JHY-H-408L provided by a certain manufacturer. The temperature gradient distribution from the inlet to the outlet is, for example, Figure 3 the temperature gradient distribution from left to right as shown in the figure, with high-temperature zones at both ends and a low-temperature zone in the middle. And the temperature at the inlet is closer to the normal temperature of 25 °C, or the middle is a high-temperature region and both ends are low-temperature zones. Among them, the temperature at the inlet and outlet is closer to the normal temperature of 25 °C, which can reduce the heat exchange between the inlet and outlet and the outside, and reduce the energy loss in the temperature generating box.

[0030] The conveying module includes a belt-type conveying mechanism. On the belt 3 of the belt-type conveying mechanism, there are provided an installation seat for the temperature sensor to be tested and an installation seat for the standard temperature sensor, which are respectively used for the installation of the temperature sensor 5 to be tested and the standard temperature sensor 4. On the installation seat for the temperature sensor to be tested and the installation seat for the standard temperature sensor, there are also provided communication ports connected to the communication pins of the corresponding sensors, and the communication ports are communicatively connected to the inspection control module, so as to upload the temperature sensing signals of the temperature sensor 5 to be tested and the standard temperature sensor 4 to the inspection control module; the conveying module is communicatively connected to the inspection control module to control the conveying speed of the belt 3 according to the control signal provided by the inspection control module.

[0031] Among them, the conveying speed of the conveyor belt 3 needs to be specifically adjusted according to the working requirements of the temperature sensor to be measured and the temperature distribution in the temperature generating chamber 1, so as to avoid excessive speed exceeding the temperature response speed of the temperature sensor to be measured, resulting in a large error in the sensed temperature provided by the temperature sensor to be measured. For example, when the temperature response speeds of the temperature sensor to be measured and the standard temperature sensor are 25 degrees Celsius per minute, and the temperature gradient in the temperature generating chamber increases linearly from the inlet to the outlet, with a temperature span of 25 degrees Celsius, if the conveying speed of the conveyor belt 3 is too large and the elapsed time of the temperature sensor to be measured in the temperature generating chamber 1 is less than one minute, the measured temperatures obtained at each moment will be lower than the actual temperature at its location, resulting in unreliable test results. Therefore, the conveying speed of the conveyor belt 3 needs to be set specifically according to the specific situation, and the present application does not make special limitations on this.

[0032] For convenient control, in this embodiment, the inspection control module includes: a host computer 9, a communication module 8, a data acquisition module 6, and a power supply module 7 for powering each module.

[0033] The data acquisition module 6 is connected to the power supply module 7, the communication module 8, and the communication ports of the temperature sensor mounting seat to be measured and the standard temperature sensor mounting seat. It can provide working power for each sensor according to the power provided by the power supply module 7, collect the temperature sensing signals of each sensor, and convert the multiple parallel-collected temperature sensing signals into serial signals and upload them to the communication module 8. The communication module 8 further uploads the data to the host computer 9. The host computer 9 processes, analyzes, stores, etc. the multiple temperature sensing signals, which can be used for the display of various data and test results, as well as the query of historical data, etc.

[0034] The communication module 8 is also communicatively connected to the drive motor of the conveyor belt type conveying mechanism, the host computer 9, and the temperature controller 2 of the temperature generating chamber 1. The user can input the target temperature requirement and the target conveying speed requirement through the host computer 9. The host computer 9 provides corresponding control signals to the communication module 8 according to the target temperature requirement and the target conveying speed requirement, and then distributes the corresponding control signals to the drive motor of the conveyor belt type conveying mechanism and the temperature controller 2 of the temperature generating chamber 1 through the communication module 8, so that the conveyor belt type conveying mechanism and the temperature generating chamber 1 can work under the target conveying speed requirement and the target temperature requirement.

[0035] Among them, the data acquisition module 6 can be implemented by using a parallel-to-serial data conversion chip, etc. The communication module 9 can be implemented based on a single-chip microcomputer. The host computer 9 can be implemented based on a central processing unit. The power supply module 7 can select the corresponding power conversion chip according to the power consumption requirements of each part. The power supply of the power supply module 7 can select commercial power, and can be flexibly selected specifically according to the functional requirements and cost control requirements. The present application does not make special limitations on this.

[0036] In a specific embodiment, the host computer includes a rotational speed setting unit, a temperature setting unit, and a data analysis unit. The rotational speed setting unit is communicatively connected to the drive motor of the conveyor belt type conveying mechanism through the communication module 8. The temperature setting unit is communicatively connected to the temperature generating box controller 2 of the temperature generating box 1 through the communication module 8. The data analysis unit is communicatively connected to the data acquisition module 6 through the communication module 8. The data processing amounts of the rotational speed setting unit and the temperature setting unit are relatively small, and they are separately arranged from the data analysis unit, which can ensure the reliability of the data analysis of the data analysis unit and the credibility of the test results.

[0037] It can be understood that the above data acquisition, data processing, and parameter setting in the present application are all conventional technologies in the field of digital control. Those skilled in the art can, based on the prior art and in combination with the above technical requirements, implement the technical requirements of the present application. For other specific implementation details, the present application will not be elaborated herein.

[0038] In a specific example, the mounting seats of the sensors are directly connected to the data acquisition module 6 through communication cables. When the conveyor belt is running, it will drive the communication cables to move synchronously. To avoid the entanglement and interference of the communication cables during the system operation, the drive motor is selected as a bidirectional rotatable motor. When a set of tests is completed, the temperature sensor to be tested is replaced, and the drive motor is controlled to rotate in the reverse direction. Each sensor can traverse the temperature in the temperature generating box in the reverse direction to meet the test requirements, and the communication cables that are slightly entangled during the forward operation can return to normal after the reverse operation, avoiding the influence of the communication cables.

[0039] To reduce the design requirements of the physical layout of the communication cables on the conveying method of the conveying module, in an alternative example, as Figure 2 shown, the conveying module further includes a linear slide 11. The conveyor belt is arranged above the linear slide. The linear slide 11 is provided with linear brush conductive sheets 12. A plurality of linear brush conductive sheets 12 are arranged in parallel in an electrically isolated manner. The linear brush conductive sheets 12 are communicatively connected to the test control module. The communication ports on the mounting seats of the temperature sensor to be tested and the standard temperature sensor are connected with brush heads 13, and are respectively coupled to the linear brush conductive sheets 12 through the brush heads 13. Thus, when the temperature sensor 5 to be tested and the standard temperature sensor 4 move along with the conveyor belt, the communication cables communicatively connected between the linear brush conductive sheets 12 and the test control module can remain stationary, reducing the design difficulty of the physical layout of the communication cables.

[0040] To improve the inspection efficiency, the temperature sensor mount to be tested and the standard temperature sensor mount are set side by side as a group, and multiple groups are arranged along the conveyor belt of the conveyor belt type conveying mechanism. Multiple temperature sensors to be tested can be installed simultaneously for batch detection. The sensors in the same batch enter the temperature generating chamber in sequence and can all completely experience the temperature gradient in the temperature generating chamber, ensuring the reliability of the inspection. The brush heads of the electric brushes of the temperature sensor mount to be tested and the standard temperature sensor mount in the same batch and the corresponding linear brush conductive sheets 12 are arranged at intervals in the conveying direction to prevent two or more temperature sensors from being connected to the same linear brush conductive sheet 12 at the same time and avoid data crosstalk.

[0041] Among them, to avoid data crosstalk, the number of parallel arrangements of the linear brush conductive sheets 12 needs to correspond to the number of sensors in a batch. The more temperature sensors to be tested in the same batch, the more the number of parallel arrangements of the linear brush conductive sheets 12, and the interval of the parallel arrangements of the temperature sensors to be tested in the conveying direction needs to be increased synchronously. Furthermore, a wider conveying channel is required, which will increase the temperature exchange window between the temperature generating chamber and the outside and increase the heat preservation energy consumption of the temperature generating chamber.

[0042] Therefore, in an optional embodiment, as Figure 3 shown, the linear brush conductive sheets 12 are arranged at intervals in the extending direction of the linear slide 11, and each section is respectively communicatively connected to the inspection control module. The same section of the linear brush conductive sheet 12 is only electrically coupled to the brush head 13 at the same time. There will be a certain interval between each section of the linear brush conductive sheets 12, and there will be a certain interval in the corresponding temperature acquisition data. However, the overall continuity can still meet the data volume requirements of the inspection. The acquisition data corresponding to each section of the linear brush conductive sheets 12 on the same line can be combined to obtain complete data.

[0043] Among them, the contact position will affect the transmission resistance and the electrical signal characteristics of the transmitted signal. Therefore, the brush scheme is more suitable for digital temperature sensors, and it can be actually selected according to specific situations.

[0044] To facilitate the disassembly and assembly of the sensor to the corresponding mount and ensure the inspection and replacement efficiency, hot-swap connection terminals are provided on the temperature sensor mount to be tested and the standard temperature sensor mount to enable hot-swap connection with the corresponding sensor through the hot-swap connection terminals.

[0045] To facilitate the user to intuitively understand the actual performance of the temperature sensor to be tested, the data analysis unit includes an oscilloscope and can display as Figure 3The test results are shown. Among them, curve L1 is the sensed temperature data of the standard temperature sensor, and curve L2 is the sensed temperature data of the temperature sensor to be tested. It can be seen that the temperature sensor inspection device provided by the present invention can effectively inspect the actual sensing situation of the temperature sensor. By setting the temperature ranges at both ends, the temperature difference between the outlet and the inlet of the temperature generator and the outside can be reduced, the energy loss of heat exchange can be reduced, the consistency between the actual temperature and the set temperature at various parts inside the temperature generation box can be improved, the inspection controllability can be improved, and the sensing ability of the temperature sensor to be tested at each temperature point can be obtained. Compared with single-point inspection, the comprehensiveness of the inspection can be effectively improved, providing efficient technical guidance for the qualified inspection and parameter calibration of the temperature sensor.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The above embodiments only represent several specific implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A temperature sensor inspection device, characterized in that, Comprising: A temperature generating chamber, a conveying module, and an inspection control module, wherein A conveying channel is provided in the temperature generating chamber, the conveying module is disposed through the conveying channel, and the temperature generating chamber is a stepped temperature control temperature generating chamber that can have a linear temperature difference along the direction of the conveying channel; The conveying module includes a conveyor belt type conveying mechanism. On the conveyor belt of the conveyor belt type conveying mechanism, there are provided a to-be-tested temperature sensor mounting seat and a standard temperature sensor mounting seat. Communication ports connected to the communication pins of the corresponding sensors are further provided on the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat. The communication ports are communicatively connected to the inspection control module, and the conveying module is communicatively connected to the inspection control module.

2. The temperature sensor inspection device according to claim 1, characterized in that, The inspection control module includes: a host computer, a communication module, and a data acquisition module, wherein The data acquisition module is connected to the communication module, and the communication ports of the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat; The communication module is communicatively connected to the drive motor of the conveyor belt type conveying mechanism, the host computer, and the temperature generating chamber.

3. The temperature sensor inspection device according to claim 2, wherein, The host computer includes a rotation speed setting unit, a temperature setting unit, and a data analysis unit. The rotation speed setting unit is communicatively connected to the drive motor of the conveyor belt type conveying mechanism through the communication module, the temperature setting unit is communicatively connected to the temperature generating chamber through the communication module, and the data analysis unit is communicatively connected to the data acquisition module through the communication module.

4. The temperature sensor inspection device according to claim 3, characterized in that, The drive motor is a bidirectional rotatable motor.

5. The temperature sensor inspection device according to claim 1, wherein The conveying module further includes a linear slide. The conveyor belt is disposed above the linear slide. Linear brush conductive sheets are provided on the linear slide. A plurality of linear brush conductive sheets are arranged in electrical isolation side by side. The linear brush conductive sheets are communicatively connected to the inspection control module. Brush heads are connected to the communication ports on the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat, and are respectively coupled to the linear brush conductive sheets through the brush heads.

6. The temperature sensor inspection device according to claim 5, characterized in that, The to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat are arranged side by side as a group, and multiple groups are arranged along the conveyor belt of the conveyor belt type conveying mechanism.

7. The temperature sensor inspection device according to claim 6, characterized in that, The linear brush conductive sheets are arranged at intervals in multiple sections along the extending direction of the linear slide, and each section is communicatively connected to the inspection control module respectively.

8. The temperature sensor inspection device according to claim 1, characterized in that, Hot-swap connection terminals are provided on the to-be-tested temperature sensor mounting seat and the standard temperature sensor mounting seat to perform hot-swap connection with the corresponding sensors through the hot-swap connection terminals.

9. The temperature sensor inspection device according to claim 3, characterized in that, The data analysis unit includes an oscilloscope.

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