Test device for simulating heating of airborne electronic equipment

Abstract

The utility model discloses a test device for simulating heating of airborne electronic equipment, which comprises a cooling fan, a temperature sensor, a voltage regulator, a power regulator, an electric heating rod, a heating box and a PLC (programmable logic controller) console. Before heating of the airborne equipment is simulated, the cooling fan, the temperature sensor and the electric heating rod are installed on the heating box, and then the cooling fan, the voltage regulator, the electric heating rod and the power regulator are connected and connected to the PLC console. And starting the PLC console, checking whether the temperature sensor, the power regulator and the voltage regulator are normal or not, and then setting a heat dissipation temperature value of the heating box on a panel interface of the PLC console. Through temperature feedback of the temperature sensor on the surface of the heating box, the PLC console dynamically adjusts the electric heating rod and the fan, the voltage regulator controls the rotating speed of the cooling fan, and the power regulator controls the power of the electric heating rod, so that the surface temperature of the heating box is kept consistent with the set temperature, and heating is simulated.

Description

Technical Field

[0001] The utility model relates to a test device for simulating heating of airborne electronic equipment, belonging to the technical field of environmental testing. Background Art

[0002] With the development of various aircraft technologies in the aviation field, the onboard system tests of many aircraft need to be conducted on the ground. Only after confirming that the onboard systems meet the design indicators will they be flight verified under high-altitude conditions.

[0003] When an aircraft is in operation, all the equipment and components in its onboard systems are powered on, causing fluctuations in the ambient temperature of the equipment compartment. When the ambient temperature rises above a certain level, it can pose risks to the electronic equipment and components, leading to potential failure. Consequently, after the design of an aircraft's environmental control system is completed, an increasing number of ground-based test benches are constructed to simulate the aircraft's equipment compartment environment and recreate the operating conditions of the entire compartment during flight.

[0004] During the ground joint test of the aircraft equipment compartment, the heating simulation of the airborne equipment is more difficult and requires higher temperature control accuracy and stability.

[0005] Based on the above reasons, there is an urgent need to design a device that can be used to simulate the heating test of various airborne electronic equipment, which can simulate airborne equipment under different temperature conditions in the ground laboratory, so as to better carry out ground joint testing of aircraft equipment cabins. Summary of the Invention

[0006] The utility model aims to provide a test device for simulating the heating of airborne electronic equipment to meet the requirements of various existing heating tests of airborne electronic equipment. Furthermore, by cooperating with PLC, the test process control can be automated to improve the accuracy of temperature control and heating control.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A test device for simulating heating of airborne electronic equipment, comprising:

[0009] The heating box is a hollow shell with a plurality of through holes on its surface that communicate with the internal cavity of the heating box;

[0010] A plurality of cooling fans are installed in the through holes of the heating box, and the cooling fans discharge the gas in the internal cavity of the heating box to the environment outside the heating box;

[0011] Electric heating rods, at least one of which is installed in the inner cavity of the heating box;

[0012] A temperature sensor is mounted on the surface of the heating box;

[0013] a voltage regulator connected to a cooling fan;

[0014] A power regulator is connected to the electric heating rod.

[0015] Furthermore, the heating box is a cubic structure, and the same number of through holes are opened on two opposite side surfaces, and cooling fans of the same specifications are installed in the through holes.

[0016] Furthermore, a line connecting any two of the through holes on two opposite side surfaces of the heating box is not perpendicular to the side surfaces.

[0017] Furthermore, temperature sensors are installed on the top surface of the heating box and the two opposite side surfaces with through holes.

[0018] Furthermore, the electric heating rod is installed in the middle position of the inner cavity of the heating box.

[0019] Furthermore, the test device for simulating heating of airborne electronic equipment also includes a PLC console, which is connected to the temperature sensor, the voltage regulator and the power regulator.

[0020] Compared with the prior art, the present invention has the following features:

[0021] (1) The present invention can realize adaptive adjustment of the surface temperature of the heating box within the range of room temperature to 80°C, and the heating box can be processed according to the shape of different airborne equipment, highly reproducing the heating conditions of the airborne equipment on the aircraft, which also provides heating conditions for the airborne equipment in the ground joint test of the equipment cabin of large aircraft;

[0022] (2) The utility model also has a high degree of automation function after being combined with PLC. All cooling fans, electric heating rods, voltage regulators, and power regulators are connected to the PLC control system, which can realize real-time equipment control and data storage. It has high reliability and accuracy, and the temperature error can be controlled within ±0.1℃;

[0023] (3) After the utility model is equipped with a PLC control system, it also has over-temperature alarm shutdown, electrical signal abnormality alarm, and power over-limit alarm shutdown, which can better protect personal safety and system safety. The PLC control system has a simple and beautiful human-computer interaction interface, and each operation is simple and convenient. It can also realize the copying of test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the test device of the utility model;

[0025] In the figure, 1-heating box, 2-first cooling fan, 3-first temperature sensor, 4-second cooling fan, 5-third cooling fan, 6-electric heating rod, 7-second temperature sensor, 8-fourth cooling fan, 9-fifth cooling fan, 10-third temperature sensor, 11-sixth cooling fan, 12-first voltage regulator, 13-second voltage regulator, 14-power regulator, 15-PLC console. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0027] like Figure 1 , a test device for simulating heating of airborne electronic equipment designed for the utility model, including a cubic heating box 1, a first cooling fan 2, a first temperature sensor 3, a second cooling fan 4, a third cooling fan 5, an electric heating rod 6, a second temperature sensor 7, a fourth cooling fan 8, a fifth cooling fan 9, a third temperature sensor 10, a sixth cooling fan 11, a first voltage regulator 12 ( Figure 1 AVR in), the second voltage regulator 13 ( Figure 1 AVR in), power regulator 14 ( Figure 1 The SCR in it, i.e. thyristor or thyristor) and PLC console 15.

[0028] The inner cavity of the heating box 1 is connected to the electric heating rod 6. The heating box 1 is made of stainless steel with good heat conduction effect. Six cooling fans are installed on the two opposite side surfaces of the heating box 1, including the first cooling fan 2, the second cooling fan 4, the third cooling fan 5, the fourth cooling fan 8, the fifth cooling fan 9 and the sixth cooling fan 11. Temperature sensors are installed on the top surface of the heating box 1 and the side surface where the cooling fans are installed, including the first temperature sensor 3, the second temperature sensor 7 and the third temperature sensor 10 (corresponding to Figure 1 T1, T2 and T3 in the .

[0029] The PLC console 15 is connected to the first voltage regulator 12 , the second voltage regulator 13 , and the power regulator 14 , wherein the first voltage regulator 12 and the second voltage regulator 13 are respectively responsible for the input voltage control of the three cooling fans, and the power regulator 14 is responsible for the input power control of the electric heating rod 6 .

[0030] The PLC console 15 in this embodiment uses a high-performance Siemens PLC S7-1200 programmable logic controller to achieve precise control of the power of the electric heating rod 6 and the voltage of the six fans, and can also realize other automated control functions. In this embodiment, the PLC console 15 is mainly composed of a PLC communication module, a switch, a host, a display screen, an electric control cabinet, and communication cables. The control program is written using the KingView software. The PLC program design mainly includes parameter initialization, main program, temperature acquisition, voltage control, power control, and alarm. After the physical signals of the three temperature sensors, two voltage regulators, and power regulator 14 are transmitted to the PLC through programming using the KingView software, they are processed by the PLC into analog feedback switches and hosts. The control program written in the KingView software can control temperature, voltage, and power and alarm. The console's human-computer interaction interface includes a diagram of the heating box model, displays of various components at various locations on the model, real-time temperature values ​​for the temperature sensor, real-time voltage values ​​for the voltage regulator, real-time power values ​​for the power regulator 14, red and green alarm indicators, a start button, a stop button, and a real-time animation when the test device starts. The drop-down menu bar includes items such as real-time data recording, data table generation, data storage, data curve generation, historical data, and options. For program compilation and implementation, please refer to the PLCS7-1200 user manual and the KingView user manual and will not be repeated in this embodiment.

[0031] The temperature values ​​of the first temperature sensor 3, the second temperature sensor 7 and the third temperature sensor 10 are all displayed on the display screen, as well as an average temperature value (the average value of the temperatures displayed by the three temperature sensors).

[0032] After setting the temperature of the heating box 1 through the PLC console 15 and clicking the start button, the control system will energize the electric heating rod 6, and the temperature of the heating box 1 will begin to rise. When the feedback value from the temperature sensor on the heating box 1 reaches 80% of the temperature value set by the PLC console 15, the cooling fan will start to operate, exhausting the hot air in the heating box 1 out of the heating box 1, slowing the temperature rise rate of the heating box 1. After reaching the set temperature value, the PLC console 15 uses the temperature feedback from the temperature sensor to adaptively adjust the voltage regulator and power regulator 14 to control the temperature of the heating box 1 within the range of ±0.1°C of the set temperature.

[0033] The test device designed in this utility model, which simulates the heating of airborne electronic equipment, can easily control the operation of six cooling fans and an electric heating rod 6. For example, the cooling fan speed can be controlled by automatically or manually adjusting the output voltage of the voltage regulator, while the heating power of the electric heating rod 6 can be controlled by automatically or manually adjusting the output power of the power regulator 14. Test data from various electrical instruments can be stored and printed in real time, which is convenient and fast. The equipment layout is reasonable and aesthetically pleasing, the console has a good human-computer interaction interface, and the function settings are easy to operate. In addition, the PLC console 15 will detect signals and issue alarms or shut down when various abnormal phenomena occur.

[0034] In this embodiment, the method of using the test device for simulating heating of airborne electronic equipment is as follows:

[0035] Step 1: Turn on the power of the PLC console 15, open the human-computer interaction interface, and check whether the parameters of various electrical instruments and equipment are normal.

[0036] Step 2: Set the test required temperature of the heating box 1 on the control panel of the PLC console 15.

[0037] Step 3, select automatic mode or manual mode. If automatic mode is selected, click start, the PLC console 15 will adjust the temperature adaptively, and wait for the temperature; if manual mode is selected, continue with the following steps.

[0038] Step 4: Set the heating power of the electric heating rod 6 on the control panel of the PLC console 15, click Start, and observe the temperature of the heating box 1.

[0039] Step 5: When the temperature of the heating box 1 reaches 80% of the set value, the cooling fan input voltage is set, and the cooling fan motor is started to control the temperature of the heating box 1.

[0040] Step 6: When the temperature of the heating box 1 approaches the set target temperature, the automatic control mode is turned on, and the PLC console 15 will dynamically adjust the temperature of the heating box 1.

[0041] Step 7. Click Data Collection and select the collection period as needed.

[0042] Step 8: After the test is completed, tidy up the test bench, print the test data, and turn off the power of the test bench.

[0043] The test device in this embodiment accurately controls the temperature of the heating box 1, and has a real-time acquisition function for various test data, which can be printed at any time. The test device has the advantages of high automation, stable test parameters, accurate test measurement, simple test operation, and strong safety, and perfectly realizes the working state of the heating box 1.

[0044] The above is only one specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A test device for simulating heating of airborne electronic equipment, characterized in that: include: A heating box (1), wherein the heating box (1) is a cavity shell, and a surface of the heating box (1) is provided with a plurality of through holes communicating with the internal cavity of the heating box (1); a heat dissipation fan, wherein a plurality of the heat dissipation fans are installed in the through hole of the heating box (1), and the heat dissipation fans discharge the gas in the internal cavity of the heating box (1) into the environment outside the heating box (1); An electric heating rod (6), at least one of the electric heating rods (6) being installed in the inner cavity of the heating box (1); A temperature sensor, the temperature sensor being mounted on the surface of the heating box (1); a voltage regulator connected to a cooling fan; A power regulator (14) is connected to the electric heating rod (6).

2. A test device for simulating heating of airborne electronic equipment according to claim 1, characterized in that: The heating box (1) is a cubic structure, and the same number of through holes are opened on two opposite side surfaces, and cooling fans of the same specifications are installed in the through holes.

3. The test device for simulating heating of airborne electronic equipment according to claim 2, characterized in that: The line connecting any two of the through holes on two opposite side surfaces of the heating box (1) is not perpendicular to the side surfaces.

4. The test device for simulating heating of airborne electronic equipment according to claim 1, characterized in that: Temperature sensors are installed on the top surface of the heating box (1) and on two opposite side surfaces with through holes.

5. The test device for simulating heating of airborne electronic equipment according to claim 1, characterized in that: The electric heating rod (6) is installed in the middle of the inner cavity of the heating box (1).

6. The test device for simulating heating of airborne electronic equipment according to claim 1, characterized in that: The invention also comprises a PLC console (15), wherein the PLC console (15) is connected with the temperature sensor, the voltage regulator and the power regulator (14).

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