阅读说明：本技术 一种用于雷达微波产品的可靠性试验验证系统 (Reliability test verification system for radar microwave product ) 是由 米海波 石士进 栾家辉 王诏宣 韩慧超 朱兴高 代永德 于 2019-08-21 设计创作，主要内容包括：本发明公开了一种用于雷达微波产品的可靠性试验验证系统,通过将温湿度应力试验子系统、振动应力试验子系统与微波暗室有机连接,搭建了具有温度、湿度、振动等应力模拟能力的综合环境试验,解决了现有试验系统无法全面测试雷达微波产品的功能和性能指标,导致产品的可靠性验证不充分的问题,为提升雷达微波产品可靠性水平,满足贴近实战化考核新要求,提供了试验验证手段,从而缩短了产品的研制周期,具有较大的经济效益。(The invention discloses a reliability test verification system for radar microwave products, which is characterized in that a temperature and humidity stress test subsystem and a vibration stress test subsystem are organically connected with a microwave darkroom, so that a comprehensive environment test with the stress simulation capabilities of temperature, humidity, vibration and the like is established, the problem of insufficient reliability verification of products due to the fact that the existing test system cannot comprehensively test the functions and performance indexes of radar microwave products is solved, and a test verification means is provided for improving the reliability level of radar microwave products and meeting the new requirements close to actual combat assessment, so that the development period of the products is shortened, and the economic benefit is greater.)

1. A reliability test verification system for radar microwave products is characterized by comprising a temperature and humidity stress test subsystem (1), a vibration stress test subsystem (2), a microwave darkroom (3) and an auxiliary test subsystem;

the temperature and humidity stress test subsystem (1) comprises a test box, a wave-transmitting window (4) and a temperature and humidity stress control unit, wherein a tested radar microwave product (5) is installed in the test box, and a temperature and humidity environment set for a test is provided for the tested radar microwave product (5); the wave-transparent window (4) is used for transmitting microwave signals; the temperature and humidity stress control unit is used for monitoring the temperature and humidity in the test chamber; the temperature and humidity stress test subsystem (1) is in flexible connection with the vibration stress test subsystem (2) through a heat insulation pad and is in glued connection with the microwave darkroom (3) through the wave-transparent window (4);

the vibration stress test subsystem (2) comprises a vibration stress control unit and a vibration table, wherein the vibration stress control unit is used for monitoring the vibration stress of the vibration table, the vibration table is used for simulating the vibration stress on the tested radar microwave product (5), the tested radar microwave product (5) is placed on the vibration table, and the transmitting direction of the tested radar microwave product (5) is aligned to the wave-transparent window (4);

the microwave darkroom (3) is used for simulating the electromagnetic environment of the tested radar microwave product (5) and receiving the microwave signal of the tested radar microwave product (5);

the auxiliary test subsystem is used for providing cooling water and compressed air required by the operation of the temperature and humidity stress test subsystem and the vibration stress test subsystem.

2. The method of claim 1, wherein the vibration table simulates the vibration stress experienced by the test product by applying a sinusoidal swept vibration stress, a random vibration stress, or an impulsive vibration stress.

3. The method according to claim 1, wherein the wave-transparent window (4) is of a sandwich structure, the inner surface is coated with a coating with a loss rate of less than 30% and a temperature resistance of not less than 150 ℃, and the outer surface is coated with a coating with a loss rate of less than 30%.

4. A method according to claim 3, characterized in that the technical specifications of the wave-transparent window (4) are: wave transmission rate greater than95 percent and power resistance not less than 5W/cm²Less than 2% impact on standing waves.

5. The method of claim 1, wherein the insulation mat has both insulation and moisture barrier functions.

Technical Field

The invention belongs to the technical field of radar microwave product reliability test verification, and particularly relates to a reliability test verification system for radar microwave products.

Background

At present, the reliability test of radar microwave products is a comprehensive environment test in which the radar microwave products are placed in a comprehensive test box simulating actual storage and working environments and composite stress of temperature, humidity and vibration is applied. However, the radar microwave product is different from other electronic equipment reliability tests in that the emission and receiving performance of the radar microwave product needs to be tested through space radiation. Because the microwave power emitted by the radar microwave product is high, if wave-absorbing protection measures are not taken, the radar can be damaged by the microwaves reflected back from a short distance.

In the past, when a reliability test of a radar microwave product is carried out, the reliability identification/acceptance test of the radar microwave product is usually carried out according to the requirements of GJB 899A-2009 reliability identification and acceptance test, the function and performance of the product are tested under the condition that the product does not carry out power emission, and after the test is finished, the power emission related test of the product is finished under the static environment of a microwave darkroom according to the requirements of GJB151B-2013 electromagnetic emission and sensitivity and measurement of military equipment and subsystems. Therefore, the function and performance of radar microwave products are not fully verified in simulated storage and working environments, and the verification requirements of product reliability tests cannot be completely met on the whole.

Disclosure of Invention

In view of the above, the invention provides a reliability test verification system for radar microwave products, which is designed to perform full-power, full-state and full-radiation tests on radar microwave products to be tested under comprehensive environmental stress conditions such as temperature, humidity and vibration, so that the reliability of the radar microwave products to be tested is fully verified.

The invention provides a reliability test verification system for radar microwave products, which comprises a temperature and humidity stress test subsystem 1, a vibration stress test subsystem 2, a microwave darkroom 3 and an auxiliary test subsystem;

the temperature and humidity stress test subsystem 1 comprises a test box, a wave-transparent window 4 and a temperature and humidity stress control unit, wherein a tested radar microwave product 5 is installed in the test box, and a temperature and humidity environment set in a test is provided for the tested radar microwave product 5; the wave-transparent window 4 is used for transmitting microwave signals; the temperature and humidity stress control unit is used for monitoring the temperature and humidity in the test chamber; the temperature and humidity stress test subsystem 1 is in flexible connection with the vibration stress test subsystem 2 through a heat insulation pad and is in glued connection with the microwave darkroom 3 through the wave-transparent window 4;

the vibration stress test subsystem 2 comprises a vibration stress control unit and a vibration table, wherein the vibration stress control unit is used for monitoring the vibration stress of the vibration table, the vibration table is used for simulating the vibration stress of the tested radar microwave product 5, the tested radar microwave product 5 is placed on the vibration table, and the transmitting direction of the tested radar microwave product 5 is aligned to the wave-transparent window 4;

the microwave darkroom 3 is used for simulating the electromagnetic environment of the tested radar microwave product 5 and receiving the microwave signal of the tested radar microwave product 5;

the auxiliary test subsystem is used for providing cooling water and compressed air required by the operation of the temperature and humidity stress test subsystem and the vibration stress test subsystem.

Further, the vibration table simulates the vibration stress of the tested product by applying a sine sweep frequency vibration stress, a random vibration stress or an impact vibration stress.

Furthermore, the wave-transmitting window 4 adopts a sandwich structure, the inner surface of the wave-transmitting window is a coating with a loss rate of less than 30% and temperature resistance of not less than 150 ℃, and the outer surface of the wave-transmitting window is a coating with a loss rate of less than 30%.

Further, the technical indexes of the wave-transparent window 4 are as follows: wave transmittance is more than 95 percent, and power resistance is not less than 5W/cm²Less than 2% impact on standing waves.

Further, the heat insulation pad has heat insulation and moisture insulation functions.

Has the advantages that:

according to the invention, the temperature and humidity stress test subsystem and the vibration stress test subsystem are organically connected with the microwave darkroom, so that a comprehensive environment test with stress simulation capabilities of temperature, humidity, vibration and the like is set up, the problem that the existing test system cannot comprehensively test the function and performance indexes of a radar microwave product, so that the reliability verification of the product is insufficient is solved, and a test verification means is provided for improving the reliability level of the radar microwave product, meeting the new requirement close to actual combat assessment, so that the development period of the product is shortened, and the economic benefit is greater.

Drawings

Fig. 1 is a structural diagram of a reliability test verification system for a radar microwave product provided by the invention.

Fig. 2 is a schematic diagram of a working process of the reliability test verification system for radar microwave products provided by the invention.

Fig. 3 is a cross-sectional data diagram of temperature, humidity and vibration tests of the reliability test verification system for radar microwave products provided by the invention.

The system comprises a temperature and humidity stress test subsystem, a vibration stress test subsystem, a microwave darkroom, a wave-transparent window and a radar microwave product to be tested, wherein the temperature and humidity stress test subsystem, the vibration stress test subsystem, the microwave darkroom, the wave-transparent window and the radar microwave product to be tested are 1-included.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The reliability test verification system for the radar microwave product, disclosed by the invention, comprises a temperature and humidity stress test subsystem 1, a vibration stress test subsystem 2, a microwave darkroom 3 and an auxiliary test subsystem as shown in figure 1. The temperature and humidity stress test subsystem 1 and the vibration stress test subsystem 2 are in flexible connection through a heat insulation pad, and the heat insulation pad has the functions of heat insulation and moisture insulation; the microwave anechoic chamber 3 is connected with the temperature and humidity stress test subsystem 1 through a wave-transmitting window 4 in a gluing mode, and the wave-transmitting window 4 needs to meet the requirements of the working wave band, the microwave transmitting and receiving wave-transmitting rate and the power resistance of the tested radar microwave product 5.

1. Temperature and humidity stress test subsystem

The temperature and humidity stress test subsystem 1 comprises a temperature and humidity stress control unit, a test box and a wave-transparent window 4, is used for simulating the temperature and humidity environment experienced by the tested radar microwave product 5 in the life cycle, and can apply the stress such as temperature, humidity and the like to the product independently or simultaneously.

The temperature and humidity stress control unit is used for monitoring the temperature and humidity in the test chamber. The wave-transmitting window 4 is used as an important component of the temperature and humidity stress test subsystem 1 and is used for transmitting microwave signals between the temperature and humidity stress test subsystem 1 and the microwave darkroom 3, and in order to ensure the requirements of heat preservation, moisture preservation and temperature change rate of a working area of the test subsystem and meet the requirements of wave-transmitting rate, power resistance and influence on standing waves of a tested radar microwave product 5, the wave-transmitting window 4 adopts a sandwich structure with good wave-transmitting and heat preservation, different coatings are selected for the inner surface and the outer surface according to different use temperatures, a low-loss temperature-resistant coating is selected for the inner surface, a low-loss coating is selected for the outer surface, specifically, a coating with the loss rate of less than 30% and the temperature resistance of not less than 150 ℃ is selected for the inner surface, and a. The technical indexes of the wave-transparent window 4 are as follows under the condition that the best effect is ensured through experiments: wave transmittance is more than 95 percent, and power resistance is not less than 5W/cm²Less than 2% impact on standing waves. In addition, the test box is used for installing the tested radar microwave product 5 in the test box and providing a temperature and humidity environment set by a test for the tested radar microwave product 5, and the effective size, the temperature and humidity range and the temperature change rate of the test box need to be designed according to the tested radar microwave product 5 and the product test conditions.

2. Vibration stress test subsystem

The vibration stress test subsystem 2 comprises a vibration stress control unit and a vibration table and is used for simulating a vibration environment experienced in the service life cycle of the tested radar microwave product 5. Wherein, the vibration stress control unit is used for monitoring the vibration stress of the vibration table. The vibration table is used for simulating the vibration stress of the tested radar microwave product 5, the vibration stress such as sine sweep frequency vibration, random vibration, impact vibration and the like can be applied to the product, and the thrust, the working frequency range, the maximum bearing and the like of the vibration table are designed according to the tested radar microwave product 5 and the product test conditions.

3. Microwave darkroom

The microwave anechoic chamber 3 comprises a shielding shell, a wave-absorbing material, a transmitting-receiving antenna and a monitoring system, is used for simulating the electromagnetic environment of the actual work of the tested radar microwave product 5, and can realize the functional performance tests of the radiation power, the antenna directional diagram and the like of the product during the environment reliability test. Wherein the shielding effectiveness of the shielding shell is greater than 80 dB; the effective testing length of the darkroom is determined according to the conversion relation between the antenna aperture of the tested radar microwave product 5 and the testing distance, the far-field testing condition of the product is met, the height and the width are effectively tested, and the pitching and the azimuth angles of the wave beams are determined according to the receiving and transmitting tests of the tested radar microwave product 5; in addition, the main wave absorbing wall transceiving antenna has the functions of receiving and transmitting microwave beams in the working frequency band of the tested radar microwave product 5, can receive space radiation microwave signals, is connected with the test equipment through the radio frequency interface to perform data acquisition and processing, can also be connected with the signal simulator through the radio frequency interface to transmit simulated microwave signals, and receives the microwave signals through the tested radar microwave product 5.

4. Auxiliary test subsystem

The auxiliary test subsystem can comprise a circulating water system and a compressed air system and is used for providing cooling water and compressed air required by normal operation of the temperature and humidity comprehensive stress test system and the vibration stress test system.

The tested radar microwave product 5 is mounted to the test chamber according to the test requirements, and the antenna radiation front is aligned with the wave-transparent window. And the user executes the temperature, humidity and vibration test section through the control unit and monitors the test stress application condition according to the test task requirement. When the emission test is carried out, the tested radar microwave product 5 emits electromagnetic waves to a microwave darkroom through a wave-transparent window according to the functional performance test requirement of the product, receives electromagnetic wave signals radiated by a space through a receiving antenna in the darkroom, and transmits the electromagnetic wave signals to test equipment through a radio frequency cable for analysis and processing; when receiving test is carried out, according to the requirement of product functional performance test, the test equipment transmits electromagnetic waves through the receiving antenna in the microwave darkroom, the electromagnetic wave signals are received by the antenna array surface of the tested radar microwave product 5 through the wave-transmitting window after space radiation, and the signals are analyzed and processed by the product processing unit. And comparing and analyzing the tested radar microwave product 5 and input and output data parameters of the test equipment, and verifying the functional performance indexes of the product.