CN103217614A - System and method for detecting connectivity of pins of Dewar flask - Google Patents

Abstract

The invention discloses a Dewar bottle pin connectivity detection system and detection method. The detection system includes: a switch matrix, a source meter, and a computer. The two input ports are connected, and the communication ports of the switch matrix and the source meter are respectively connected with the two USB ports of the computer. The detection method includes the following steps: first, install the detected Dewar bottle in the detection system, then use the computer to send configuration signals to the switch matrix and the source meter in a cyclic manner, and sequentially connect the different internal and external pins of the Dewar bottle with the source meter electrically to perform resistance Test, and then use the resistance test data to judge the connectivity between the pins. When the connectivity between the pins is all judged, save the test results. The advantages of the present invention are: 1. The automation of the detection of the pin connectivity of the Dewar bottle is realized, and the detection efficiency is improved; 2. The inaccurate detection caused by manual replacement of the pin connection is avoided.

Description

A Dewar bottle pin connectivity detection system and detection method

Technical field:

The invention relates to the detection field of a Dewar bottle used for an infrared focal plane device, in particular to a detection system and a detection method for the connectivity of a pin of a Dewar bottle.

Background technique:

Dewar flasks need to be widely used in the performance testing process of infrared focal plane detectors. Dewar flasks used for testing infrared focal plane detector chips have a large number of pins, and the number of internal and external pins is usually 50 or 78. Dewar bottles need to be tested for pin connectivity before they are put into use. The existing Dewar bottle pin connectivity testing method is to use a hand-held multimeter for manual testing. The resistance to determine whether there is continuity between the pins. Since the detection of the continuity of the pins of the Dewar bottle needs to test the continuity between the inner and outer corresponding pins and the insulation between the inner and outer non-corresponding pins. For a dewar with 50 internal and external pins, at least 1125 manual multimeter measurements are required to detect the connectivity of the dewar pins, and for a dewar with 78 internal and external pins, at least 2701 measurements are required Manual multimeter measurement. The efficiency of manual detection is low and it is easy to cause fatigue of the testers, resulting in missed or false detections.

Invention content:

In order to solve the problems of the above-mentioned manual detection, the object of the present invention is to provide a kind of Dewar pin connectivity detection system that can realize the automation of Dewar pin connectivity detection and improve detection efficiency and accuracy. Detection method.

For reaching above-mentioned purpose, the present invention provides a kind of Dewar bottle pin connectivity detection system, comprising: switch matrix 102, source meter 103 and computer 104, described switch matrix 102 is to have multi-way row selection, column selection switch function The programmable switch matrix, the source meter 103 is a programmable source meter with a resistance test function, and the computer 104 is a general-purpose microcomputer. The connection method is as follows: the two row selection output ports of the switch matrix 102 are respectively connected with the two input ports of the source meter 103, and the communication ports of the switch matrix 102 and the source meter 103 are respectively connected with two USB ports of the computer 104.

A method for detecting the connectivity of the pins of a Dewar flask, the steps of which are as follows:

1. Connect the inner and outer pins of the dewar vessel 101 to be detected to two groups of column selection ports of the switch matrix 102;

Two, utilize computer 104 to send configuration signal to switch matrix 102, make each one in the inner and outer pins of dewar bottle 101 to be detected conduct with two groups of column selection ports of switch matrix 102 respectively;

3. Utilize the computer 104 to send configuration signals to the source meter 103, test the resistance between the inner and outer pins of the Dewar bottle 101 to be detected, and transmit the test results to the computer 104 after the test is completed;

4. Use the test results to judge the connectivity between the tested pins;

Five, loop step 2, step 3, step 4 to judge the connectivity between all internal and external pins of the Dewar vessel 101 to be detected;

6. Save the test results on the computer 104 hard disk.

The beneficial effects of the present invention are:

1) Realized the automation of Dewar bottle pin connectivity test and improved test efficiency.

2) The transformation of different pin connections of the Dewar flask is completed by computer control, which avoids the uncertainty of manual replacement of pin connections.

Description of drawings:

Fig. 1 is a schematic diagram of the testing system of the present invention.

Fig. 2 is a schematic diagram of the connection relationship between the inner and outer pins of the Dewar vessel to be tested, the switch matrix, and the source meter according to a specific embodiment of the present invention. Wherein, 201 is the positive port connected with the source meter 103, 202 is the negative port connected with the source meter 103, 203 is the outer pin connected with the Dewar bottle 101 to be detected, and 204 is the pin connected with the Dewar bottle 101 to be detected. Inner pin, 205 is the vertical port connected to the first group of 1×96 line-column switches of the switch matrix 102, 206 is the vertical port connected to the second group of 1×96 line-column switches of the switch matrix 102, and 207 is connected to the switch matrix 102 208 is the horizontal port connected to the second group of 1×96 line switches of the switch matrix 102 .

Fig. 3 is a schematic diagram of the running steps of the Labview detection program in a specific embodiment of the present invention.

Detailed ways:

In order to illustrate the present invention more clearly, below in conjunction with accompanying drawing and specific embodiment the present invention is further detailed as follows:

Referring to Fig. 1, the Dewar bottle 101 to be detected in the detection system of the present invention is the Dewar bottle measured in the infrared focal plane device, with 50 internal and external pins, and the switch matrix 102 is a Keithley707B switch matrix with two Keithley7075 switch matrix cards installed The host has two sets of 1×96 line-column switches, the source meter 103 is a Keithley2400 multi-function source meter, and the computer 104 is installed with Labview software, which can be used to control the switch matrix 102 and the source meter 103 and collect data by writing test programs through the Labview software.

The dewar bottle 101 to be detected, the switch matrix 102 and the source meter 103 are connected. The specific connection method is shown in FIG. Each pin of the inner pin 204 is connected with each port of the longitudinal port 206 in turn.

The switch matrix 102 and the source meter 103 are connected to the computer 104 through connection lines. Using the computer 104 to write a Labview detection program to control the switch matrix 102 and the source meter 103 to detect the connectivity of the Dewar pins.

Refer to Figure 3 for the running steps of the Labview detection program. In the first step, configure the switch matrix 102 so that the switches corresponding to the specific ports in the longitudinal port 205 and the longitudinal port 206 are closed, and the remaining switches are disconnected to realize the internal and external introduction of the Dewar bottle 101 to be detected. The two specific pins in the feet are electrically connected, the 2nd step, configure the source meter 103, and carry out the resistance test, the 3rd step, transmit the resistance data tested by the source meter 103 to the computer 104, the 4th step, receive the resistance data of the computer 104 The resistance data is judged. If the resistance is greater than 1× ¹⁰⁹ ohms, it is judged that the pins of the Dewar bottle are disconnected, and if the resistance is less than 10 ohms, it is judged that the pins of the Dewar bottle are connected. Step 5: Repeat steps 1, 2, 3, and 4 to perform connectivity detection on all possible connections between the inner and outer pins of the Dewar vessel 101 to be detected. Step 6: Save the detection results in the computer 104 .

The above specific embodiments are only for describing the present invention in detail, and do not limit the present invention in any form.

Claims (2)

1. Dewar flask pin detection of connectivity system comprises: switch matrix (102), source table (103) and computing machine (104) is characterized in that:

Described switch matrix (102) is the program-controlled switch matrix with the choosing of multichannel row, column selection switching function, and described source table (103) is the program-controlled source table with resistance test function, and described computing machine (104) is a mini-computer;

Two row of switch matrix (102) select output port to link to each other with two input ports of source table (103) respectively, and the PORT COM of switch matrix (102), source table (103) links to each other with two USB port of computing machine (104) respectively.

2. Dewar flask pin method for detecting connectivity based on the described system of claim 1 is characterized in that may further comprise the steps:

One, the inside and outside pin with Dewar flask to be detected (101) links to each other with two groups of column selection ports of switch matrix (102) respectively;

Two, utilize computing machine (104) to send configuration signal to switch matrix (102), make in the inside and outside pin of Dewar flask to be detected (101) each one respectively with two groups of column selection ports conducting of switch matrix (102);

Three, utilize computing machine (104) Xiang Yuanbiao (103) to send configuration signal, test the resistance between the inside and outside pin of Dewar flask to be detected (101), test backcasting machine (104) the test transmission result that finishes;

Four, utilize test result to judge connectedness between tested pin;

Five, circulation step two, step 3, step 4 are judged the connectedness between all inside and outside pins of Dewar flask to be detected (101);

Six, on computing machine (104) hard disk, preserve testing result.

Images