Test device and detection method for detecting diode installed in aviation control box

Abstract

The invention discloses a test device and a detection method for detecting diodes mounted in an aviation control box. The device is a box body formed by front and rear panels and upper and lower cover plates; a knob switch, a diode measurement indication area and an instrument measurement interface are arranged on the front panel; the rear panel is provided with a device test interface, a DC power supply input interface and an AC 220V input interface. The method comprises the following steps of: introducing positive and negative electrodes of corresponding pins of a diode mounted in an airborne equipment control box into a device test interface by using a matched cable; the knob switch simultaneously connects anode and cathode electrical circuits of the diode to a common detection instrument interface diode measurement gear, judges whether the product can be conducted, and measures whether the forward conduction voltage value of the diode is within a value range specified by a process test card; whether the reverse direction of the diode can be cut off or not is judged by exchanging and connecting the red meter pen and the black meter pen of the meter measuring interface universal meter, so that whether the assembling direction of the diode object in the closed shell of the aviation airborne equipment is correct or not is judged; the knob switch is rotated, and other diodes can be tested through the same operation.

Description

Technical Field

[0001] The invention relates to a test device and a test method for detecting a diode installed in an aviation control box, and belongs to the field of acceptance test equipment manufacturing for aviation airborne equipment control box products. Background Art

[0002] During the manufacturing process of aviation airborne equipment, the current direction is usually considered. Some control devices usually need to add multiple line anti-reverse diodes to ensure that the line current flows in the specified direction. The positive and negative polarities of the diodes must not be reversed during the assembly of the control box. If they are reversed, the product will not work or even be damaged. Therefore, during the factory acceptance, it is necessary to check whether these diodes are installed correctly according to the process guidance documents. The test interface of the diode installed in this aviation airborne equipment is generally led to the product end electrical interface, that is, the aviation plug, in the form of a wire or through some internal lines. The aviation plug usually uses a circular electrical connector or a square connector. The arrangement and numbering of the aviation pins of the connector have multiple ways, which are different for each product. Some arrangements are numbered from left to right, while some are arranged clockwise or counterclockwise in uppercase and lowercase English letters. At present, manual detection is usually performed using a multimeter. The corresponding aviation pin pins at both ends of the diode line must be accurately positioned. The positioning of the pin pins will take time. If the multimeter probe used is passivated, it will also cause a certain degree of damage and slight deformation to the connector pins of the delivered product. This situation will inevitably lead to human error in counting aviation pins, increasing the complexity of the test and the risk of missed detection. Summary of the invention

[0003] The present invention aims to solve the technical problem of detecting whether multiple diodes installed in a closed product control box of an airborne device are correctly installed and whether the diode parameters are qualified.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A test device for detecting diodes installed in an aviation control box, comprising a front panel, a multi-layer multi-position knob switch, a diode measurement indication area, an instrument measurement interface, a rear panel, a device test interface, a DC power input interface and an AC 220V input interface; the front panel, the rear panel, the upper and lower cover plates are combined into a box-type structure; the front panel is equipped with a multi-layer multi-position knob switch, a diode measurement indication area and an instrument measurement interface; the rear panel is equipped with a device test interface, a DC power input interface and an AC 220V input interface; the red and black test interfaces of the instrument measurement interface are respectively welded to the 1st and 2nd static contacts of the multi-layer and multi-position knob switch, and the 1st and 2nd dynamic contact test positions are introduced into the device test interface installed on the rear panel according to the test diodes marked on the panel; the positive power line of the DC power input interface is introduced into the 3rd static contact of the multi-layer and multi-position knob switch, and the test position welding wire of the 3rd dynamic contact is connected to the positive pole of the indicator light corresponding to the measurement indication area marked with the panel diode. The indicator light is directly returned to the negative end of the power supply after being connected in series with a current limiting resistor. The indicator light in the indication area is made into a PCB light board, and the light board is connected to the negative end of the power supply.

[0005] A method for testing a diode installed in an aviation control box using a test device comprises the following steps: Step 1: Use the matching cable to connect the positive and negative electrodes of the corresponding pins of the diode in the airborne device control box to the device test interface; Step 2: Use a multi-layer, multi-position knob switch to simultaneously connect the positive and negative electrical circuits of the diode to the diode measurement gear of the common detection instrument interface to determine whether the product can be turned on, and measure whether the forward conduction voltage value of the diode is within the value range specified on the process test card; Step 3: By exchanging the red and black test leads of the multimeter connected to the instrument measurement interface, it is determined whether the diode can be cut off in the reverse direction, so as to determine whether the actual assembly direction of the diode inside the closed shell of the aviation airborne equipment is correct; Step 4: Rotate the multi-layer, multi-position knob switch and perform the same operation to test the remaining diodes.

[0006] The beneficial effects of adopting the above technical solution are: 1. The present invention can improve the efficiency of positive and negative detection of product diodes and has the function of preventing test personnel from misoperating or missing detection.

[0007] 2. The present invention has low manufacturing cost, simple operation, and convenient use and maintenance.

[0008] 3. The output interface of the present invention is universal, and the matching cables made according to the interface definition can meet the needs of positive and negative detection of diodes installed in different control box products. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1The present invention is a schematic diagram of the front panel structure of the test device for detecting diodes installed in an aviation control box.

[0010] Figure 2 The figure is a schematic diagram of the rear panel structure of the test device for detecting diodes installed in an aviation control box according to the present invention.

[0011] Figure 3 The figure is a schematic diagram of the testing principle of the test device for detecting diodes installed in an aviation control box according to the present invention.

[0012] In the figure: 1-front panel, 2-multi-layer and multi-position knob switch, 3-diode measurement indication area, 4-instrument measurement interface, 5-rear panel, 6-device test interface, 7-DC power input interface, 8-AC 220V input interface, 9-adapter cable, 10-product aviation plug, 11-product built-in diode. DETAILED DESCRIPTION

[0013] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] A test device for detecting diodes installed in an aviation control box, comprising a front panel 1, a multi-layer multi-position knob switch 2, a diode measurement indication area 3, an instrument measurement interface 4, a rear panel 5, a device test interface 6, a DC power input interface 7 and an AC220V input interface 8; the front panel 1, the rear panel 5, the upper and lower cover plates are combined into a box-type structure; the multi-layer multi-position knob switch 2, the diode measurement indication area 3 and the instrument measurement interface 4 are installed on the front panel 1; the device test interface 6, the DC power input interface 7 and the AC 220V input interface 8 are installed on the rear panel 5; the red and black test interfaces of the instrument measurement interface 4 are respectively welded to the first and second layers of static contacts (common points) of the multi-layer multi-position knob switch 2, and the test gears of the first and second layers of moving contacts are introduced into the device test interface 6 installed on the rear panel 5 according to the test diodes marked on the panel; the positive and negative pins corresponding to the diodes installed in the control box product can be introduced into the device instrument measurement interface 4; Before using the device, you only need to use the matching adapter cable 9 to connect the product aviation plug 10 to the device test interface 6, and then use the standard red and black M4 banana test wires to connect the multimeter diode gear test interface to the instrument measurement interface 4, turn on the power, and rotate the multi-layer multi-gear knob switch 2 to detect the forward conduction voltage value of the product's built-in diode 11. By reading the voltage value displayed by the multimeter and comparing it with the value required by the process card, you can directly determine whether the diode forward conduction voltage parameter is within the qualified range. The power positive line in the DC power input interface 7 is introduced into the third layer of static contacts of the multi-layer multi-gear knob switch 2, and the test gear welding wire of the third layer of moving contacts is connected to the positive pole of the corresponding indicator light in the panel identification diode measurement indication area 3. The indicator light is directly returned to the negative end of the power supply after being connected in series with the current limiting resistor. The indicator light in the indication area is made into a PCB light board, and the light board is connected to the negative power supply. When the multi-layer multi-gear knob switch 2 is rotated, the corresponding indicator light will be lit to correctly feedback the diode under test, so as to prevent the problem that the test value does not correspond to the test record value due to misreading the knob gear.

[0015] In addition, the gears of the multi-layer multi-position knob switch 2 can be designed into corresponding gears according to the test requirements. If the gears are not enough, multiple multi-layer multi-position knob switches 2 can be designed to increase the number of detection paths to meet the test requirements of different control box products.

[0016] The rear panel 5 mainly includes a DC power input interface 7 and an AC 220V input interface 8. The AC power supply is connected to the mains electricity and enters the device through the AC220V input interface 8. The required voltage value is output through the internal switch power conversion of the device. It also includes a device test interface 6, which is a universal test interface. After the pins corresponding to each diode under test are defined through the device, a dedicated adapter cable is manufactured by analyzing the interfaces of the diodes of different control box products, and then the corresponding control box products are connected to the device. In this way, the forward and reverse detection requirements of diodes of multiple different products can be met.

[0017] A method for testing a diode installed in an aviation control box using a test device comprises the following steps: Step 1: Use the matching cable to connect the positive and negative electrodes of the corresponding pins of the diode in the airborne device control box to the device test interface 6; Step 2: Use the multi-layer multi-position knob switch 2 to simultaneously connect the positive and negative electrical circuits of the diode to the diode measurement gear of the common detection instrument interface (multimeter), determine whether the product can be turned on, and measure whether the forward conduction voltage value of the diode is within the value range specified in the process test card; Step 3, by exchanging the red and black test leads of the multimeter connected to the instrument measurement interface 4, determine whether the diode can be cut off in the reverse direction, so as to determine whether the physical assembly direction of the diode inside the closed shell of the aviation airborne equipment is correct; Step 4: Rotate the multi-layer multi-position knob switch 2, and perform the same operation to test the remaining diodes.

[0018] This method can save the time of diode forward and reverse detection test. It only needs to switch the diodes in multiple different electrical circuits inside the detection product through the multi-layer multi-position knob switch 2 and the exchange of multimeter test leads. The diode detection requirements of different control box products can be met by manufacturing matching test cables through interface definition.

[0019] One of the following equipment types manufactured according to the method described below (note that the following equipment shapes and structures are included but not limited to the following equipment shapes and structures) is described as follows: The whole device adopts a chassis structure, and an aluminum alloy chassis is recommended; it is mainly divided into front and rear panels; the rear panel is installed with I / O test interface and power input interface. The chassis power supply can choose external DC power input or internal switching power supply using external AC input for conversion. The rear panel test interface is a universal detection interface, which can meet the needs of multiple diode detection for different products by converting the test cable according to the interface definition. The front panel is divided into regional layouts, mainly including the following parts: 1. Operation area: Use a multi-layer multi-position knob switch, usually a three-layer multi-position knob switch, to switch different diodes inside the detection control box. Its main function is to switch the measurement circuit to the instrument measurement interface and the corresponding indicator light in the measurement indication area at the same time; 2. Instrument interface: Use red and black M4 standard jacks for marking. Use M4 banana test wires to connect to the multimeter diode test position according to the corresponding color markings. Its internal wiring is connected to the 1st and 2nd layer static contacts of the three-layer knob switch. The accuracy of the test data can be guaranteed by connecting an external high-precision multimeter. 3. Measurement indication area: It serves as an indicator. Its internal wiring is connected to the third layer of the moving contact of the three-layer knob switch. When the knob is rotated for diode detection, the diode indicator light of the corresponding path will light up. This can prevent test deviation caused by inaccurate knob positioning and ensure the accuracy of the test path.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A test device for detecting diodes installed in an aviation control box, comprising a front panel (1), a multi-layer multi-position rotary switch (2), a diode measurement indication area (3), an instrument measurement interface (4), a rear panel (5), a device test interface (6), a DC power input interface (7) and an AC 220V input interface (8); the front panel (1), the rear panel (5), the upper and lower cover plates are combined into a box-type structure; the front panel (1) is provided with a multi-layer multi-position rotary switch (2), a diode measurement indication area (3) and an instrument measurement interface (4); the rear panel (5) is provided with a device test interface (6), a DC power input interface (7) and an AC 220V input interface (8); 220V input interface (8); the red and black test interfaces of the instrument measurement interface (4) are respectively welded to the first and second layers of static contacts of the multi-layer multi-position knob switch (2); the test positions of the first and second layers of moving contacts are introduced into the device test interface (6) installed on the rear panel (5) according to the test diodes marked on the panel; the positive power line in the DC power input interface (7) is introduced into the third layer of static contacts of the multi-layer multi-position knob switch (2); the test position welding wire of the third layer of moving contacts is connected to the positive electrode of the indicator light corresponding to the panel marked diode measurement indication area (3); the indicator light is directly returned to the negative end of the power supply after being connected in series with a current limiting resistor; the indicator light in the indication area is made into a PCB light board, and the light board is connected to the negative end of the power supply.

2. The method for testing a diode installed in an aviation control box by using a test device as claimed in claim 1, comprising the following steps: Step 1: Use the matching cable to connect the positive and negative electrodes of the corresponding pins of the diode in the airborne device control box to the device test interface (6); Step 2: Use a multi-layer multi-position knob switch (2) to simultaneously connect the positive and negative electrical circuits of the diode to the diode measurement range of the common detection instrument interface to determine whether the product can be turned on and to measure whether the forward conduction voltage of the diode is within the range specified on the process test card; Step 3, by exchanging the red and black test leads of the multimeter connected to the instrument measurement interface (4), determine whether the diode can be cut off in the reverse direction, so as to determine whether the actual assembly direction of the diode inside the closed shell of the aviation airborne equipment is correct; Step 4: Rotate the multi-stage multi-position knob switch (2) and repeat the same operation to test the remaining diodes.

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