Test tool applied to multiple power supply products

Abstract

The utility model belongs to the technical field of communication, and particularly relates to a test tool applied to a plurality of power supply products in related technologies of communication networks, electronic circuits and the like. In the development process of military power supply products, in order to ensure the reliability of delivered products, comprehensive tests and aging tests need to be carried out. Product tests generally require manual timing operation of a measuring instrument, data measurement and result recording; due to manual operation, manpower is consumed. The test tool comprises a main control computer, a tandem box, a direct-current power supply, a load tool, a serial port expansion box, an electronic load and a digital multimeter, the main control computer is respectively connected with the tandem box, the direct-current power supply and the digital multimeter through the serial port expansion box; the direct-current power supply is connected with the power supply product through an RS232 communication cable, and the power supply product is connected with the load tool; the output end of the load tool is connected with the tandem box, the tandem box is connected with the digital multimeter, and the digital multimeter is used for displaying digital signals of voltage output values.

Description

Technical Field

[0001] The utility model belongs to the field of communication technology, and specifically relates to a test tool applied to multiple power supply products in technologies related to communication networks, electronic circuits, etc. Background Art

[0002] In the development process of military power products, in order to ensure the reliability of the delivered products, comprehensive tests and operation aging tests are required. These product tests generally require manual timed operation of measuring instruments, measuring data, and recording results. Because it is a manual operation, it consumes manpower. With the increase in the batch and variety of power products, the number of people required for this work has also increased rapidly, becoming the main bottleneck restricting the rapid increase in power production capacity, and it is also the primary problem that must be solved for the development of the power industry. According to this situation, it is urgent to develop automated testing tooling suitable for the comprehensive testing and aging needs of power products to save labor, reduce costs, and increase production capacity. Utility Model Content

[0003] In view of this, the utility model provides a testing tool applied to multiple power supply products.

[0004] The utility model adopts the following specific technical solutions:

[0005] The test tooling includes a main control computer, junction box, DC power supply, load tooling, serial port expansion box, electronic load and digital multimeter;

[0006] The main control computer is respectively connected to the junction box, the DC power supply and the digital multimeter through the serial port expansion box;

[0007] The DC power supply is connected to the power supply product via an RS232 communication cable.

[0008] The power supply product is connected to a load tool;

[0009] The output end of the load tooling is connected to a junction box, the junction box is connected to a digital multimeter, and the digital multimeter is used to display a digital signal of a voltage output value.

[0010] Preferably, the test fixture further comprises an electronic load, and the main control computer is connected to the electronic load via a serial port expansion box; the electronic load is respectively connected to each power supply product.

[0011] Preferably, the junction box comprises a junction matrix and a control circuit for receiving commands from a main control computer.

[0012] Preferably, shutters are provided on the peripheral sides of the junction box.

[0013] Preferably, the junction box is provided with a flow hole and a reserved plug port.

[0014] Preferably, the load tooling and the junction box are provided with the same type of plug-in ports, and the same names are marked on the plug-in ports.

[0015] Preferably, the two ends of the RS232 communication cable are a D-shaped profile connector port for connecting to a power product, and a trapezoidal connector port for connecting to a load tooling.

[0016] Preferably, the box body of the junction box is made of aluminum alloy.

[0017] Beneficial Effects

[0018] (I) The test fixture applied to multiple power supply products solves the problem of manual timed operation of measuring instruments, measuring data, and recording results, which relies on manual labor, consumes manpower, and affects the production capacity of power supply products. It has the characteristics of saving labor costs and improving production capacity.

[0019] (2) The junction box is equipped with shutters and handles to facilitate heat dissipation and movement of the chassis.

[0020] (III) The junction box adopts an anti-misinsertion design, as well as different types of connector ports and identification designs at both ends of the cable. Misinsertion during the test process may lead to adverse consequences.

[0021] (IV) The junction matrix in the junction box uses optical MOS relays, which have the advantages of low power consumption, fast response and good isolation performance. They are widely used in communication, measurement, automatic control and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the minimum component of automated test fixture;

[0023] Figure 2 It is the connection diagram of the test system;

[0024] Figure 3 Provide a functional block diagram for the junction box;

[0025] Figure 4 It is the connection matrix configuration;

[0026] Figure 5 This is the structure diagram of the plug-in port at the input end of the junction box;

[0027] Figure 6 This is the structure diagram of the plug-in port at the output end of the junction box. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings: It should be emphasized that the embodiments described in the utility model are illustrative rather than restrictive, so the present invention is not limited to the embodiments described in the specific implementation methods, and any other implementation methods derived by those skilled in the art based on the technical solution of the utility model also fall within the scope of protection of the utility model.

[0029] like Figure 1 As shown, the test fixture for multiple power products includes: a main control computer, a serial port expansion box, a load fixture, an electronic load, a DC power supply and a junction box. The main control computer is connected to the serial port expansion box via a USB interface, and the DC power supply is connected to the serial port expansion box via an RS232 communication cable (when the DC power supply is connected to the power product), and the main control computer controls the DC power supply to supply power to the power product. In addition, the serial port expansion box is also connected to the junction box and the digital multimeter via an RS232 communication cable, so that the junction box and the digital multimeter are controlled by the main control computer.

[0030] The load fixtures correspond to the power products one by one, and the load fixtures use load fixture boards that can be purchased directly on the market; the power products are connected to the corresponding load fixtures via RS232 communication cables, and the load fixtures are used to simulate electrical loads of different types and sizes for the power products; each load fixture output terminal leads to a measuring point, which transmits the voltage output signal of the power product and is connected to a junction box via an RS232 communication cable. The junction box connects the voltage output signals of multiple power products to a digital multimeter through the time division switching of the junction matrix (time division switching is a time division multiplexing (TDM) technology used in switching telecommunication networks), and converts them into digital signals, thereby achieving the technical effect of a digital multimeter measuring multiple power products simultaneously at time intervals.

[0031] The main control computer in the automated testing tooling displays the digital signal converted by the digital multimeter on the display terminal of the main control computer.

[0032] In addition, the main control computer is connected to the electronic load through the serial port expansion box, and the electronic load is respectively connected to each power supply product, and the load voltage is provided to the power supply product through the electronic load.

[0033] The load fixtures correspond to the power products one by one, that is, the output end of the power product is connected to the corresponding load fixture through an RS232 communication cable, and the load fixture leads to the measuring point connected to the junction box.

[0034] like Figure 2 As shown, the main control computer is connected to a serial port expansion box via a USB interface. As an example, the serial port expansion box provides 12 serial port paths for connecting a DC power supply, a digital multimeter, a junction box, an electronic load, and other test instruments or equipment. Figure 2The intermediate transfer fixture is a component in the load fixture, which is used to connect the power supply product to the load fixture and apply the load voltage to the power supply product.

[0035] like Figure 3 As shown, the junction box includes a chassis and a printed circuit board arranged in the chassis. The printed circuit board is provided with a junction matrix and a control circuit. The core of the control circuit is a single-chip microcomputer (equivalent to the CPU in the figure), which is used to receive commands from the main control computer and convert the output voltage value of the power supply product into a voltage output signal. The junction matrix is ​​used to exchange the measured signal input of the multi-point power supply product to the input end of the digital multimeter in a time-sharing manner; the junction matrix and the control circuit are both based on existing technologies. In addition to the printed circuit board, the chassis of the junction box also needs to accommodate AC / DC power modules and tablet computer modules. Shutters or current holes required for ventilation and heat dissipation are arranged around the junction box, and necessary installation positions for the plug ports are reserved. A carrying handle can be installed on the outside of the junction box as needed.

[0036] like Figure 4 , 5 As shown, the structure of the tandem matrix adopts a hybrid mode of binary tree configuration and flattened configuration, which can fully utilize the control capability of the I / O port and reduce the excessive cascade levels of the complete binary tree structure. As an example, the entire tandem matrix consists of 32 units ( Figure 4 Only two units are shown in the figure). Each unit consists of three switches forming a two-level binary tree. Each binary tree has four leaf nodes, one of which is used for parking when not active, and the other three can provide three measurement points for tandem connection. In this way, 32 units can provide 96 measurement points (equivalent to Figure 4 The test channel in the junction box receives the voltage output signal from the power supply product through the 10 plug ports on the outside of the junction box.

[0037] The junction matrix is ​​composed of optical MOS relays, which are used to control the on-off of the signal of the junction box. The control signal is output by the parallel port of the microcontroller in the junction box. The junction matrix is ​​used to exchange the signal output of multi-point power products to the input end of the digital multimeter in a time-sharing manner.

[0038] As an example, the load tooling adopts an anti-misplugging design to prevent adverse consequences caused by inadvertent wrong plugging during use. Two measures are taken in the design to prevent misplugging. First, different types of plug ports are selected for the two ends of the RS232 communication cable (one end is a D-shaped contour plug port for connecting the power product, and the other end is a trapezoidal plug port for connecting the load tooling); second, the plug port connected to one end of the junction box and the plug port connected to the load tooling are of the same type of plug port, and the same name is marked in a conspicuous position on the plug port.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A test fixture for multiple power products, characterized in that: It includes a main control computer, junction box, DC power supply, load tooling, serial port expansion box, electronic load and digital multimeter; The main control computer is respectively connected to the junction box, the DC power supply and the digital multimeter through the serial port expansion box; The DC power supply is connected to the power supply product via an RS232 communication cable. The power supply product is connected to a load tool; The output end of the load tooling is connected to a junction box, the junction box is connected to a digital multimeter, and the digital multimeter is used to display a digital signal of a voltage output value.

2. A test fixture for multiple power products according to claim 1, characterized in that: It also includes an electronic load. The main control computer is connected to the electronic load via a serial port expansion box; the electronic load is connected to each power supply product respectively.

3. The test fixture for multiple power products according to claim 1, characterized in that: The junction box comprises a junction matrix and a control circuit for receiving commands from a main control computer.

4. The test fixture for multiple power products according to claim 1, characterized in that: Shutters are arranged around the junction box.

5. The test fixture for multiple power products according to claim 1, characterized in that: The junction box is provided with a flow hole and a reserved plug port.

6. The test fixture for multiple power products according to claim 5, characterized in that: The load tooling and the junction box are provided with the same type of plug-in ports, and the same name is marked on the plug-in ports.

7. The test fixture for multiple power products according to claim 1, characterized in that: The two ends of the RS232 communication cable are a D-shaped profile plug port for connecting to a power supply product, and a trapezoidal plug port for connecting to a load tooling.

8. A test fixture for multiple power products according to any one of claims 1 to 7, characterized in that: The box body of the junction box is made of aluminum alloy.

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