Thermistor temperature sensor detection device

Abstract

The utility model provides a thermistor temperature sensor detection device, and belongs to the field of temperature sensor detection. The device comprises a constant-temperature box, a test tube fixing tool and a data acquisition module, a tool mounting hole is formed in the constant-temperature box, the test tube fixing tool comprises a first fixing plate, a second fixing plate and a connecting rod, the first fixing plate and the second fixing plate are arranged in parallel at an interval, and the connecting rod penetrates through the first fixing plate and the second fixing plate; the first fixing plate is matched with the tool mounting hole, the second fixing plate is arranged above the tool mounting hole, a plurality of test tube mounting holes are formed in the first fixing plate and the second fixing plate, the test tube mounting holes are used for mounting test tubes, and thermistor temperature sensors to be tested are placed in the test tubes; the data acquisition module is used for monitoring the resistance of the thermistor temperature sensor to be detected. By adopting the thermistor temperature sensor detection device provided by the embodiment of the utility model, the problem of low detection efficiency in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensor detection, in particular to a detection device for a thermistor temperature sensor. Background Technique

[0002] A thermistor is a temperature-sensitive component whose resistance changes with temperature. The resistance of a positive temperature coefficient thermistor (PTC) increases with the increase of temperature, and the resistance of a negative temperature coefficient thermistor (NTC) decreases with the increase of temperature. Due to the characteristics of high sensitivity, small size and simple use of the thermistor, it is widely used in various circuits.

[0003] In the aviation-related fields, in order to meet the temperature detection requirements of different scenarios, sensors with different shapes and sizes can be made using thermistors of different specifications. After the finished product of the thermistor temperature sensor is produced, accuracy detection is required. In the prior art, the detection method of the thermistor temperature sensor is to detect it one by one at each temperature point manually. The temperature of the constant temperature device needs to be set manually for each temperature point, and wait for the constant temperature device and the sensor to reach temperature equilibrium.

[0004] In the prior art, the detection method of the thermistor temperature sensor requires the detection of each thermistor temperature sensor one by one at each temperature point, resulting in a long detection time and cumbersome detection steps, thus leading to low detection efficiency. Content of the Utility Model

[0005] The embodiment of the utility model provides a detection device for a thermistor temperature sensor, which can solve the problem of low detection efficiency in the prior art. The technical solution is as follows:

[0006] A detection device for a thermistor temperature sensor includes: a constant temperature box, a test tube fixing tooling and a data acquisition module.

[0007] A tooling installation hole is opened on the constant temperature box.

[0008] The test tube fixing tooling includes a first fixing plate, a second fixing plate and a connecting rod. The first fixing plate and the second fixing plate are arranged in parallel at intervals. The connecting rod passes through the first fixing plate and the second fixing plate. The first fixing plate matches the tooling installation hole. The second fixing plate is arranged above the tooling installation hole. A plurality of test tube installation holes are opened on the first fixing plate and the second fixing plate. The test tube installation holes are used for installing test tubes, and the test tubes are placed with the thermistor temperature sensors to be detected.

[0009] The data acquisition module is used to monitor the resistance of the thermistor temperature sensor to be detected.

[0010] Optionally, a plurality of the connecting rods are provided, and the plurality of connecting rods are arrayed and penetrate through the first fixing plate and the second fixing plate.

[0011] Optionally, the test tube fixing tooling includes a third fixing plate and an insulating rubber pad. The insulating rubber pad is wrapped outside the third fixing plate. The third fixing plate and the insulating rubber pad are slidably arranged on the connecting rod, at one end far from the first fixing plate and covering the test tube mounting hole. Cross holes matching the test tube mounting hole are formed in the third fixing plate and the insulating rubber pad.

[0012] Optionally, a bath inlet is formed in the thermostat. The tooling mounting hole is located at the bottom of the bath inlet, and the second fixing plate matches the bath inlet.

[0013] Optionally, a control module is arranged on the thermostat, and the control module is used to control the temperature of the thermostat.

[0014] Optionally, a display is arranged on the thermostat, and the display is in signal connection with the control module.

[0015] Optionally, a controller is further included. A first communication interface is arranged on the thermostat, and the first communication interface is in signal connection with the controller.

[0016] Optionally, the data acquisition module includes a common end, a sensor cable interface, and a second communication interface. The common end is communicated with the sensor cable interface, and the second communication interface is in signal connection with the controller.

[0017] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model at least include:

[0018] A thermistor temperature sensor detection device provided by an embodiment of the present utility model is provided with test tube fixing tooling, and a plurality of test tube mounting holes are arranged on the first fixing plate and the second fixing plate of the test tube fixing tooling. A plurality of test tubes can be installed on the first fixing plate and the second fixing plate at the same time. A plurality of thermistor temperature sensors to be tested are respectively placed in the plurality of test tubes, and then the thermistor temperature sensors to be tested are placed inside the thermostat through the test tube fixing tooling. The plurality of thermistor temperature sensors to be tested are subjected to constant temperature treatment at the same time, and the resistance of the plurality of thermistor temperature sensors to be tested is measured through the data acquisition module, so as to perform accuracy detection on the plurality of thermistor temperature sensors to be tested at the same time, and can effectively solve the problem of low detection efficiency in the prior art. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the present invention;

[0021] Figure 2 It is a schematic top view structure diagram of the incubator provided by the embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the test tube fixing tooling structure provided by the embodiment of the present invention;

[0023] Figure 4 It is provided by the embodiment of the present invention Figure 3 A-A side cross-sectional schematic diagram of the third fixing plate and the insulating rubber pad;

[0024] Figure 5 It is a schematic diagram of the data acquisition module structure provided by the embodiment of the present invention;

[0025] Figure 6 It is a signal transmission schematic diagram provided by the embodiment of the present invention.

[0026] In the figure: 1 - incubator; 11 - tooling installation hole; 12 - bath trough; 13 - control module; 14 - display; 15 - first communication interface; 2 - test tube fixing tooling; 21 - first fixing plate; 22 - second fixing plate; 23 - connecting rod; 24 - test tube installation hole; 25 - third fixing plate; 26 - insulating rubber pad; 27 - cross hole; 3 - data acquisition module; 31 - common terminal; 311 - positive pole of the common terminal; 312 - negative pole of the common terminal; 32 - sensor cable interface; 321 - positive pole of the cable interface; 322 - negative pole of the cable interface; 33 - second communication interface; 34 - relay control board; 35 - relay; 351 - positive pole of the relay; 352 - negative pole of the relay; 4 - controller. Detailed implementation manners

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail in conjunction with the drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the present invention; Figure 2 It is a schematic top view structure diagram of the incubator provided by the embodiment of the present invention; Figure 3It is a schematic structural diagram of a test tube fixing tooling provided by an embodiment of the present utility model; Figure 4 It is provided by an embodiment of the present utility model Figure 3 Schematic A-A side cross-sectional view of the third fixing plate and the insulating rubber pad; Figure 5 It is a schematic structural diagram of a data acquisition module provided by an embodiment of the present utility model; Figure 6 It is a schematic signal transmission diagram provided by an embodiment of the present utility model. As Figures 1 to 6 Shown is a thermistor temperature sensor detection device, including: a constant temperature box 1, a test tube fixing tooling 2, and a data acquisition module 3. A tooling installation hole 11 is provided on the constant temperature box 1. The test tube fixing tooling 2 includes a first fixing plate 21, a second fixing plate 22, and a connecting rod 23. The first fixing plate 21 and the second fixing plate 22 are arranged in parallel at intervals. The connecting rod 23 passes through the first fixing plate 21 and the second fixing plate 22. The first fixing plate 21 matches the tooling installation hole 11. The second fixing plate 22 is arranged above the tooling installation hole 11. A plurality of test tube installation holes 24 are provided on the first fixing plate 21 and the second fixing plate 22. The test tube installation holes 24 are used to install test tubes. A thermistor temperature sensor to be measured is placed in the test tube. The data acquisition module 3 is used to monitor the resistance of the thermistor temperature sensor to be measured.

[0029] Exemplarily, in the embodiment of the present utility model, a thermostatic medium is contained in the thermostatic chamber 1. In order to prevent the thermostatic medium from directly contacting the thermistor temperature sensor to be measured, the operation of placing the thermistor temperature sensor to be measured into a test tube and then placing the test tube in the thermostatic chamber 1 is adopted for detection. The first fixing plate 21, the second fixing plate 22 and the connecting rod 23 are all made of metal. In the present utility model, the shape of the tooling installation hole 11 can be set according to actual usage requirements. The first fixing plate 21 and the second fixing plate 22 can be changed according to the shape of the tooling installation hole 11, so that when the first fixing plate 21 enters the interior of the thermostatic chamber 1 through the tooling installation hole 11 and contacts the thermostatic medium, the second fixing plate 22 is stuck by the upper surface of the thermostatic chamber 1, so that the test tube fixing tooling 2 will not completely fall into the thermostatic chamber 1, thus facilitating its taking. In this embodiment, both the tooling installation hole 11 and the first fixing plate 21 are circular, and the second fixing plate 22 is square with a side length greater than the diameter of the tooling installation hole 11. The thermistor temperature sensor to be measured is placed into the test tube. The test tube can be selected according to the size and shape of the thermistor temperature sensor to be measured. Then the test tube is placed on the test tube fixing tooling 2. The test tube opening is larger than the test tube installation hole 24, and the test tube opening can be erected on the second fixing plate. Multiple sets of test tube fixing tooling 2 can be provided, and the sizes of the test tube installation holes 24 on each set of test tube fixing tooling 2 are different, and different test tube fixing tooling 2 can be selected according to different test tubes. The connecting rod 23 is fixedly connected to the first fixing plate 21 and the second fixing plate 22, playing a role in fixing and supporting the first fixing plate 21 and the second fixing plate 22. Compared with the traditional technology of detecting the thermistor temperature sensor to be measured one by one, in the thermistor temperature sensor detecting device in the embodiment of the present utility model, multiple thermistor temperature sensors to be measured are placed in the thermostatic medium of the thermostatic chamber 1 through test tubes and test tube fixing tooling 2, and the resistance of multiple thermistor temperature sensors to be measured is detected simultaneously, thereby improving the detection efficiency.

[0030] A thermistor temperature sensor detecting device provided by an embodiment of the present utility model is provided with a test tube fixing tooling 2, and a plurality of test tube installation holes 24 are arranged on the first fixing plate 21 and the second fixing plate 22 of the test tube fixing tooling 2. Multiple test tubes can be installed on the first fixing plate 21 and the second fixing plate 22 at the same time. Multiple thermistor temperature sensors to be measured are respectively placed in multiple test tubes, and then the thermistor temperature sensors to be measured are placed inside the thermostatic chamber 1 through the test tube fixing tooling 2. Multiple thermistor temperature sensors to be measured are subjected to thermostatic treatment at the same time, and the resistance of multiple thermistor temperature sensors to be measured is measured by the data acquisition module 3, so as to perform accuracy detection on multiple thermistor temperature sensors to be measured at the same time, and can effectively solve the problem of low detection efficiency in the prior art.

[0031] Optionally, a plurality of connecting rods 23 are provided, and the plurality of connecting rods 23 are arrayed and passed through the first fixing plate 21 and the second fixing plate 22.

[0032] Exemplarily, in the embodiment of the present invention, the first fixing plate 21 is circular, and three connecting rods 23 are provided. The connecting rods 23 are evenly spaced along the circumferential direction of the first fixing plate 21. By providing a plurality of connecting rods 23, the structure of the test tube fixing tooling 2 is made more stable. When more test tubes are installed simultaneously, the structural strength of the test tube fixing tooling 2 can also be ensured, thereby ensuring the number of thermistor temperature sensors to be tested during simultaneous testing and further improving the detection efficiency of the thermistor temperature sensor detection device.

[0033] Optionally, the test tube fixing tooling 2 includes a third fixing plate 25 and an insulating rubber pad 26. The insulating rubber pad 26 is wrapped outside the third fixing plate 25. The third fixing plate 25 and the insulating rubber pad 26 are slidably arranged on the connecting rod 23, located at one end far from the first fixing plate 21 and covering the test tube mounting hole 24. A cross hole 27 matching the test tube mounting hole 24 is provided on the third fixing plate 25 and the insulating rubber pad 26.

[0034] Exemplarily, in the embodiment of the present invention, by providing the third fixing plate 25 and the insulating rubber pad 26, after the test tube is placed in the constant temperature box 1, the test tube opening can be covered by the third fixing plate 25 and the insulating rubber pad 26 to prevent heat from escaping from the test tube opening, so that the temperature inside the test tube is closer to the true temperature inside the constant temperature box 1, thereby improving the accuracy of the detection result of the thermistor temperature sensor detection device. The thermistor temperature sensor to be tested needs to be connected to the data acquisition module 3 through a cable to detect the thermistor temperature sensor to be tested. By providing a cross hole 27 on the third fixing plate 25 and the insulating rubber pad 26, the cable can pass through the cross hole 27 and enter the inside of the test tube to be connected to the thermistor temperature sensor to be tested. The cross hole 27 allows the cable to move within a certain range and has a smaller diameter than a round hole, preventing excessive heat from escaping through the cross hole 27, thereby further improving the accuracy of the detection result. By slidably arranging the third fixing plate 25 and the insulating rubber pad 26 on the connecting rod 23, when installing the cable, the third fixing plate 25 and the insulating rubber pad 26 can be removed first, passed through the cross hole 27 and connected to the thermistor temperature sensor to be tested, and then the thermistor temperature sensor to be tested is placed in the test tube, and the third fixing plate 25 and the insulating rubber pad 26 are installed back on the connecting rod 23, which facilitates the connection of the circuit and improves the operation convenience of the thermistor temperature sensor detection device.

[0035] Optionally, a bath trough 12 is provided on the constant temperature box 1, the tooling mounting hole 11 is located at the bottom of the bath trough 12, and the second fixing plate 22 matches the bath trough 12.

[0036] Exemplarily, in the embodiment of the present utility model, a bathing tank 12 is arranged around the tooling installation hole 11. When the constant temperature box 1 limits and fixes the second fixing plate 22, not only the vertical limit and fixation are carried out, but also the horizontal limit and fixation can be carried out. In this embodiment, both the bathing tank 12 and the second fixing plate 22 are square. When the second fixing plate 22 is installed on the constant temperature box 1, it is embedded in the bathing tank 12, so that the tank wall of the bathing tank 12 limits the second fixing plate 22 in the horizontal direction, thereby making the test tube fixing tooling 2 more stably arranged on the constant temperature box 1, and thus improving the stability of the thermistor temperature sensor detection device of the present invention.

[0037] Optionally, a control module 13 is arranged on the constant temperature box 1, and the control module 13 is used to control the temperature of the constant temperature box 1.

[0038] Exemplarily, in the embodiment of the present utility model, by setting the control module 13 to control the stability of the constant temperature box 1, the resistance change of the thermistor temperature sensor to be measured can be detected at different temperatures, so as to increase the detection items for each thermistor temperature sensor to be measured, and further improve the accuracy of the detection result of the thermistor temperature sensor detection device of the present invention.

[0039] Optionally, a display 14 is arranged on the constant temperature box 1, and the display 14 is in signal connection with the control module 13.

[0040] Exemplarily, in the embodiment of the present utility model, by setting the display 14, the operator can observe the temperature inside the constant temperature box 1 displayed in the display 14 in real time, so as to facilitate the operator to respond according to the actual situation, thereby further improving the operation convenience of the thermistor temperature sensor detection device of the present invention.

[0041] Optionally, a controller 4 is further included. A first communication interface 15 is arranged on the constant temperature box 1, and the first communication interface 15 is in signal connection with the controller 4.

[0042] Exemplarily, in the embodiment of the present utility model, the controller 4 can be a data processing device such as a computer or a host computer, which is used to receive the temperature data transmitted by the constant temperature box 1, and can remotely control the temperature of the constant temperature box 1 through the controller 4, so that the staff does not need to wait beside the constant temperature box 1 to adjust the temperature of the constant temperature box 1, further improving the operation convenience of the thermistor temperature sensor detection device of the present invention. At the same time, by setting a program in the controller 4, after the test of the thermistor temperature sensor to be measured is completed at the current temperature, the controller 4 can automatically adjust to the next test temperature for testing, thereby improving the automation degree of the thermistor temperature sensor detection device of the present invention.

[0043] Optionally, the data acquisition module 3 includes a common terminal 31, a sensor cable interface 32, and a second communication interface 33. The common terminal 31 is connected to the sensor cable interface 32, and the second communication interface 33 is signal-connected to the controller 4.

[0044] Exemplarily, in the embodiment of the present utility model, the data acquisition module 3 further includes a plurality of relay control boards 34. A relay 35 is provided on the relay control board 34. The relay 35 includes a relay positive electrode 351 and a relay negative electrode 352. In this embodiment, the relay 35 is arranged in two rows and three columns. Two relays 35 in each column are correspondingly connected to a thermistor temperature sensor to be measured. The common terminal 31 includes a common terminal positive electrode 311 and a common terminal negative electrode 312. The sensor cable interface 32 includes a cable interface positive electrode 321 and a cable interface negative electrode 322. Connect all the relay positive electrodes 351 in the upper row to the common terminal positive electrode 311, and the relay negative electrodes 352 in the upper row are respectively connected to each cable interface positive electrode 321. Connect the relay positive electrodes 351 in the lower row to the common terminal negative electrode 312, and the relay negative electrodes 352 in the lower row are connected to the cable interface negative electrode 322. Connect the sensor cable interface 32 to the thermistor temperature sensor to be measured through a cable. Connect the common terminal positive electrode 311 and the common terminal negative electrode 312 of the common terminal 31 to the positive and negative terminals of a digital multimeter respectively. The controller 4 can be a data processing device such as a computer or a host computer, which is used to receive the data transmitted by the data acquisition module 3, and the switch of the relay 35 can be remotely controlled through the controller 4. When the thermistor temperature sensor to be measured reaches the temperature to be tested in the constant temperature box 1 and lasts for a period of time, the constant temperature box 1 transmits a signal to the controller 4. The controller 4 controls the two relays 35 in the first column to be turned on, and controls the digital multimeter to collect and save the resistance data of the first thermistor temperature sensor to be measured. After the detection of the first thermistor temperature sensor to be measured is completed, the data acquisition module 3 transmits a signal to the controller 4, causing the controller 4 to turn off the relays 35 in the first column and turn on the relays 35 in the second column, so as to collect and save the resistance data of the next thermistor temperature sensor to be measured. After sequentially detecting all the thermistor temperature sensors to be measured in a cycle, the controller 4 transmits a signal to control the constant temperature box 1 to adjust the temperature, enter the next temperature point and maintain a constant temperature for a period of time, and then perform the resistance test at the next temperature for all the thermistor temperature sensors to be measured. In this way, the resistance tests of all the thermistor temperature sensors to be measured at multiple temperature points are completed, the data is recorded to generate a report, and the measured resistance results are compared with the standard values to confirm whether the accuracy of the thermistor temperature sensor to be measured meets the usage requirements. The embodiment of the present utility model realizes automatic continuous testing. For detections at different temperatures, there is no need for frequent manual intervention. The test switching of the thermistor temperature sensor to be measured and the temperature setting of the constant temperature box 1 are all controlled by the controller 4 throughout the process, thereby further improving the automation degree of the thermistor temperature sensor detection device and greatly improving the test efficiency.

[0045] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the field to which the present utility model pertains. The terms "first", "second" and similar terms used in the description and claims of the present utility model patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0046] The above are only optional embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A thermistor temperature sensor detection device, characterized in that: include: A constant temperature box (1), a test tube fixing tool (2) and a data acquisition module (3), The thermostatic box (1) is provided with a tool installation hole (11). The test tube fixing tool (2) comprises a first fixing plate (21), a second fixing plate (22) and a connecting rod (23); the first fixing plate (21) and the second fixing plate (22) are arranged in parallel and spaced apart; the connecting rod (23) is passed through the first fixing plate (21) and the second fixing plate (22); the first fixing plate (21) matches the tool mounting hole (11); the second fixing plate (22) is arranged above the tool mounting hole (11); a plurality of test tube mounting holes (24) are provided on the first fixing plate (21) and the second fixing plate (22); the test tube mounting holes (24) are used to mount test tubes; a thermistor temperature sensor to be tested is placed in the test tube; The data acquisition module (3) is used to monitor the resistance of the thermistor temperature sensor to be tested.

2. The thermistor temperature sensor detection device according to claim 1, characterized in that: A plurality of the connecting rods (23) are provided, and the plurality of connecting rods (23) are arranged in an array and penetrate the first fixing plate (21) and the second fixing plate (22).

3. The thermistor temperature sensor detection device according to claim 1, characterized in that: The test tube fixing tool (2) comprises a third fixing plate (25) and an insulating rubber pad (26), wherein the insulating rubber pad (26) is wrapped around the outside of the third fixing plate (25), and the third fixing plate (25) and the insulating rubber pad (26) are slidably arranged on the connecting rod (23), located at an end away from the first fixing plate (21) and covering the test tube mounting hole (24), and a cross hole (27) matching the test tube mounting hole (24) is opened on the third fixing plate (25) and the insulating rubber pad (26).

4. The thermistor temperature sensor detection device according to claim 1, characterized in that: The thermostatic box (1) is provided with a bathing groove (12), the tooling installation hole (11) is located at the bottom of the bathing groove (12), and the second fixing plate (22) matches the bathing groove (12).

5. The thermistor temperature sensor detection device according to claim 1, characterized in that: The thermostatic box (1) is provided with a control module (13), and the control module (13) is used to control the temperature of the thermostatic box (1).

6. The thermistor temperature sensor detection device according to claim 5, characterized in that: The thermostatic box (1) is provided with a display (14), and the display (14) is signal-connected to the control module (13).

7. The thermistor temperature sensor detection device according to claim 1, characterized in that: It also includes a controller (4), and the thermostatic box (1) is provided with a first communication interface (15), and the first communication interface (15) is connected to the controller (4) by signal.

8. The thermistor temperature sensor detection device according to claim 7, characterized in that: The data acquisition module (3) comprises a common end (31), a sensor cable interface (32) and a second communication interface (33); the common end (31) is connected to the sensor cable interface (32); and the second communication interface (33) is connected to the controller (4) by signal.

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