CN204807238U - A test fixture for water temperature sensor detection - Google Patents

Abstract

The utility model discloses a test fixture for water temperature sensor detection, characterized in that: the test fixture includes a cylinder connected to an upper test plate assembly, an ejector pin is provided on the upper test plate assembly, a lower test plate assembly with a concave structure is provided below the upper test plate assembly, a water temperature sensor to be tested is placed on the lower test plate assembly, and the ejector pin contacts the output end of the water temperature sensor. Due to the above structure, the utility model realizes automatic detection of the water temperature sensor during factory testing, ensuring the factory quality of the product; the test results are accurate and reliable; the structure is simple, and there is no need to increase excessive costs.

Description

A test fixture for water temperature sensor detection

technical field

The utility model relates to the detection and inspection of the water temperature sensor, in particular to a test fixture used for the detection of the water temperature sensor and a method for testing the resistance value by matrix scanning of a single-chip microcomputer.

Background technique

The current test method for water temperature sensors is to manually use a multimeter to test the resistance value of the water temperature sensors one by one. This detection method is inefficient and prone to missed tests, which is not conducive to the manufacturer's control of product quality.

In view of the above problems, a new type of test fixture is provided, which is a problem that needs to be solved in the prior art when the automatic detection of the water temperature sensor is realized during the factory test.

Utility model content

The technical problem to be solved by the utility model is to provide a test fixture for the detection of the water temperature sensor, which can automatically detect the water temperature sensor during the factory test and ensure the quality of the product when it leaves the factory.

In order to achieve the above object, the technical solution of this utility model is a test fixture for water temperature sensor detection, which is characterized in that: the test fixture includes a cylinder connected to the upper test board assembly, and the upper test board assembly is equipped with The thimble, the bottom of the upper test board assembly is provided with the lower test board assembly of concave structure, the water temperature sensor to be tested is placed on the lower test board assembly, and the thimble is in contact with the output end of the water temperature sensor.

The number of thimbles is 40, and the arrangement structure is 5×8.

The cylinder is fixed to the support rod through the two ends of the cylinder fixing plate, and the lower test board assembly is fixed to the support rod through the lower test board adjustment sleeve.

The lower part of the support rod is connected through the lower support plate.

The upper test board assembly is provided with a guide post, which passes through the guide sleeve arranged on the cylinder fixing plate to fix the moving track of the upper test board assembly.

The thimble is connected to the test circuit, and the resistance value of the water temperature sensor is measured and recorded through the control of the single-chip microcomputer.

A test fixture for water temperature sensor detection, a method for testing resistance with a single-chip microcomputer matrix. Due to the adoption of the above-mentioned structure, the utility model realizes the automatic detection of the water temperature sensor during the factory test to ensure the quality of the product; the test result is accurate and the reliability is strong; the structure is simple, and there is no need to increase too much cost.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail;

Fig. 1 is the structural representation of a kind of test fixture that is used for water temperature sensor detection of the utility model;

Fig. 2 is a partial structural schematic diagram of a test fixture for water temperature sensor detection of the present invention;

Fig. 3 is a side structural schematic diagram of a test fixture used for water temperature sensor detection of the present invention;

In Figure 1-3, 1. cylinder; 2. guide sleeve; 3. cylinder fixing plate; 4. guide post; 5. upper test board assembly; 6. thimble; 7. lower test board assembly; 8. support Rod; 9, the lower support plate; 10, the lower test plate adjustment sleeve.

Detailed ways

As shown in Fig. 1-3, the utility model comprises that the cylinder 1 is connected with the upper test board assembly 5, the upper test board assembly 5 is provided with a thimble 6, and the bottom of the upper test board assembly 5 is provided with a lower test board with a concave structure. The board assembly 7, the water temperature sensor to be tested is placed on the lower test board assembly 7, and the thimble 6 is in contact with the output end of the water temperature sensor. The number of thimbles 6 is 40, and the arrangement structure is 5×8 distribution.

The cylinder 1 is fixed on the support rod 8 through the two ends of the cylinder fixing plate 3 , and the lower test board assembly 7 is fixed on the support rod 8 through the lower test board adjustment sleeve 10 . The lower part of the support rod 8 is connected by a lower support plate 9 . The upper test board assembly 5 is provided with a guide post 4 , which passes through the guide sleeve 2 arranged on the cylinder fixing plate 3 to fix the moving track of the upper test board assembly 5 .

The temperature sensor is put into the lower test board assembly 7, and the upper test board assembly moves downward under the control of the cylinder, and the upper test board thimble 6 is in contact with the output end of the sensor. The thimble pin 6 is connected to the test circuit, and the 13 I/O ports of the single-chip microcomputer are used to form a 5×8 scanning matrix on the upper and lower test boards. Using the conversion circuit, after AD conversion, the table look-up method is used to determine whether the sensor is qualified.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above method, as long as the various improvements made by the technical solution of the utility model are adopted, or directly applied to other occasions without improvement All are within the protection scope of the present utility model.

Claims (6)

1. the test fixture detected for cooling-water temperature sensor, it is characterized in that: described test fixture comprises test board assembly (5) in cylinder (1) connection, upper test board assembly (5) is provided with thimble (6), the below of upper test board assembly (5) is provided with the lower test board assembly (7) of concave structure, lower test board assembly (7) is upper places cooling-water temperature sensor to be measured, and thimble (6) contacts with the output terminal of cooling-water temperature sensor.

2. a kind of test fixture detected for cooling-water temperature sensor according to claim 1, is characterized in that: described thimble (6) quantity is 40, and arrangement architecture is 5 × 8 distributions.

3. a kind of test fixture detected for cooling-water temperature sensor according to claim 1, it is characterized in that: described cylinder (1) is fixed on support bar (8) by the two ends of air cylinder fixed plate (3), lower test board assembly (7) is fixed on support bar (8) by lower test board regulating sleeve (10).

4. a kind of test fixture detected for cooling-water temperature sensor according to claim 3, is characterized in that: the bottom of described support bar (8) is connected by lower supporting plate (9).

5. a kind of test fixture detected for cooling-water temperature sensor according to claim 1 or 3, it is characterized in that: described upper test board assembly (5) is provided with guide pillar (4), through the guide pin bushing (2) be arranged in air cylinder fixed plate (3), the motion track of upper test board assembly (5) is fixed.

6. a kind of test fixture detected for cooling-water temperature sensor according to claim 1, is characterized in that: described thimble (6) connecting test circuit, and control survey also records the resistance of cooling-water temperature sensor.