CN114035168A - Automatic test system for complete radar - Google Patents

Abstract

The invention discloses an automatic test system of a radar complete machine, which adopts a signal conversion center as an excitation channel and a test channel to provide a microwave channel for the test of the radar complete machine, one end of the signal conversion center receives a microwave signal to be tested, a timing signal and a control signal, the other end of the signal conversion center is connected with a test instrument to configure basic information of the radar complete machine, set the batch number, the model specification and the test stage of radar, select one or more of an oscilloscope, a signal source and a frequency spectrograph for use by test items, select one or more of the software version, the timing signal, a radio frequency signal, a PG value, sensitivity and lobe performance of the radar according to the test items sent by a main control computer, as test contents, establish a corresponding signal channel in the signal conversion center according to the radar configuration, the test instrument and the test contents, and transmit the signal to be tested to the test instrument, and generating a test result data packet and feeding back the test result data packet to the main control computer.

Description

Automatic test system for complete radar

Technical Field

The invention belongs to the technical field of radar testing, and particularly relates to a sensing computer technology.

Background

In the field of radar production, radar complete machine test and far field test are mostly manual or semi-automatic tests. The test equipment of different test modes is independent, and the port is various, and is high to tester's technical capability requirement. The form can not standardize, the test result can not be standardized, and the test efficiency can not be effectively improved. The test data cannot form effective data management and analysis, the production and test capability of radar products is limited, and the production cost and uncertainty of the radar are increased.

Disclosure of Invention

The invention provides an automatic test system for a complete radar machine, which aims to solve the problems in the prior art and adopts the following technical scheme in order to achieve the purpose.

The system adopts the signal conversion center as an excitation channel and a test channel to provide a microwave channel for the test of the whole radar, one end of the system receives a microwave signal to be tested, a timing signal and a control signal, the other end of the system is connected with a test instrument to configure the basic information of the whole radar, set the batch number, the model specification and the test stage of the radar, select one or more of an oscilloscope, a signal source and a spectrometer for test items, according to the test items sent by the main control computer, one or more of the software version, timing signal, radio frequency signal, PG value, sensitivity and lobe performance of the radar are selected as test contents, according to the radar configuration, the test instrument and the test contents, and establishing a corresponding signal path in the signal conversion center, transmitting the signal to be tested to an instrument for testing, generating a test result data packet, and feeding back the test result data packet to the main control computer.

Furthermore, the signal conversion center comprises a control panel, an Ethernet adapter board, microwave switches, an adjustable attenuator, a direct current power supply, cables and joints, the control panel receives a control instruction sent by the main control computer through the Ethernet adapter board to generate TTL level signals and control the on-off of different microwave switches to form different signal paths, the adjustable attenuator distributes the power of the signals, the direct current power supply supplies power to each unit, and the cables and the joints are connected with the inside of the center.

Specifically, the control panel adopts a micro-program controller MCU as a main control chip, a complex programmable logic circuit CPLD is adopted to expand the number of control ports, the dynamic range of the adjustable attenuator is 0-70 decibels, and a stainless steel SMA-KFK adapter and an LAN port are adopted as connectors.

Furthermore, the system selects to automatically control the liquid cooling equipment and the power supply equipment to work, liquid supply to the liquid cooling equipment is started, the liquid cooling sensor is used for monitoring the liquid cooling flow in real time, power is supplied to the power supply equipment, and the voltage and current sensors are used for monitoring the voltage and the current in real time, so that environmental monitoring is realized.

Furthermore, frequency points required by the sensitivity and PG value of the test signal are set, and the radar whole machine is enabled to work under the parameters.

Specifically, when the sensitivity of a signal is tested, a radio frequency path from a signal source to a far-field horn is established in a signal conversion center, a system controls a radar complete machine to receive a radio frequency signal from the far-field horn, if the signal reaches a check threshold and a threshold value of detection probability, a power value output by the signal source is recorded, Po is equal to the output power value of the signal source, L is equal to the sum of an attenuation value from the radar to the far-field horn and an attenuation value from the far-field horn to an instrument, G is equal to the gain of the far-field horn, H is equal to the gain of the radar, Pr is equal to the sensitivity, and a main control computer calculates the sensitivity according to Pr, Po-L-G + H.

Specifically, when the PG value of a signal is tested, a radio frequency path from a far-field loudspeaker to a frequency spectrograph is established in a signal conversion center, the system controls the far-field loudspeaker to receive a high-power radio frequency signal from a radar whole machine, P is a power value tested by the frequency spectrograph, and a main control computer calculates the PG value according to the PG, P-G + L.

The invention forms big data by relying on the debugging, operation, equipment state and other information collected by a multi-source sensor, manages basic information configuration, comprises product information, product process configuration, a test stage, product test items, station basic composition, test items and configuration management of several types of basic information of functional modules, automatically receives test data returned by each instrument, analyzes, displays and stores the test result of each item, marks test time, test items and product information, outputs a test report according to a specified format, and conveniently provides data viewing and analysis; the testing process is automatically controlled, the radio frequency channel is automatically calibrated, the testing channel is automatically switched, manual intervention is reduced, a worker can complete the testing, data processing and report generation of the whole radar through a main control computer, the automation and the intelligentization degree of the testing are improved, and the uncertain factors caused by manual interpretation performance and manual operation are reduced.

Drawings

Fig. 1 is a schematic diagram of a system configuration, fig. 2 is a functional diagram of a host computer, fig. 3 is a configuration flowchart, and fig. 4 is a preparation work flowchart.

Reference numerals: 1-main control computer, 2-environment monitoring, 3-liquid cooling equipment, 4-power supply equipment, 5-signal conversion center, 6-radar complete machine, 7-far field loudspeaker and 8-instrument.

Detailed Description

The technical scheme of the invention is specifically explained in the following by combining the attached drawings.

The structural principle of the system is shown in figure 1, a main control computer 1 controls the whole testing process, state information of a liquid cooling device 3 and a power supply device 4 is collected through an environment monitoring device 2, the liquid cooling device 3 dissipates heat of a radar complete machine 6, the power supply device 4 supplies power to the radar complete machine 6, a signal conversion center 5 establishes a signal channel between the radar complete machine 6 and the main control computer 1, an instrument 8 and a far-field loudspeaker 7, the instrument 8 tests radio-frequency signals of the radar complete machine 6 and feeds back a testing result to the main control computer 1, and the far-field loudspeaker 7 provides bidirectional receiving and sending supporting equipment for testing the sensitivity and the PN value of the radar complete machine 6.

The function of the main control computer is shown in figure 2, basic information configuration, test execution, data processing and data report generation are provided for the radar complete machine, the configuration flow is shown in figure 3 and comprises basic information configuration, test item configuration 1), test item configuration 2) and test item configuration 3), the basic information configuration sequentially sets radar batch number, model specification and test stage, the test item configuration 1) uses a selection instrument comprising an oscilloscope, a signal source and a spectrometer to automatically control whether liquid cooling equipment and power supply equipment are used, environment monitoring software acquires state information of liquid cooling flow, voltage and current data through a sensor, the test item configuration 2 selects items to be tested, the items comprise software version, timing signal, radio frequency signal, PG value, sensitivity and lobe performance of the radar complete machine, a test passage is established, and the test item configuration 3) sets test radio frequency signal sensitivity, And the PG value is a required frequency point, and the performance of the test lobe is required to be parameters such as scanning width, stepping width and the like.

The preparation work flow before the test is started is shown in fig. 4, firstly, the state of the instrument is checked, the instrument selected in 1) is checked whether the instrument is on line or normal or not and works normally according to the configuration of the test items, if the instrument is normal, the environment monitoring is started, the liquid cooling equipment is controlled to start liquid supply, after the liquid supply of the liquid cooling equipment is started, the liquid cooling sensor is used for monitoring the liquid cooling flow in real time, the power supply equipment is controlled to start power supply, the voltage and current sensors are used for checking the voltage state, and the voltage and the current are monitored in real time.

The method is characterized in that external cable connection is required to be continuously replaced among different test items in the test process of the whole radar, or microwave modules such as an attenuator and a power divider are connected, a signal conversion center is a key device for realizing automatic test of a far-field station, the microwave modules such as the attenuator and the power divider which are required to be connected are integrated, an excitation channel and a test channel are switched through a switch, and the external cable connection is not required to be replaced

The control panel receives a control instruction from the main control computer, and converts the control instruction into a corresponding switch control signal according to the control instruction to complete the switching of microwave signal channels, the switch control device adopts a micro-program controller MCU as a main control chip and adopts a complex programmable logic circuit CPLD to expand the number of control ports, the device adopts an Ethernet mode to realize the communication with the main control computer, and the adjustable attenuator can attenuate an excitation signal to meet the test requirement of attenuating a 0-70 decibel dynamic range.

The microwave switch establishes a corresponding radio frequency channel and a corresponding test channel, performance index parameters of the microwave switch directly influence the performance of the channel so as to influence system test indexes, a signal conversion center selects a mechanical switch which is the same as a complete machine signal adapter, the switching frequency reaches the million level, the repeatability is good, the frequency range is wide, the power tolerance is strong, the standing wave is small, the insertion loss is small, and the switching speed can reach the ms level.

The above-described embodiments are not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the present invention.

Claims (7)

1. An automatic test system for a complete radar machine is characterized by comprising: the signal conversion center is used as an excitation channel and a test channel to provide a microwave channel for the test of the whole radar, one end of the signal conversion center receives a microwave signal to be tested, a timing signal and a control signal, the other end of the signal conversion center is connected with a test instrument, the basic information of the whole radar is configured, the batch number, the model specification and the test stage of the radar are set, one or more of an oscilloscope, a signal source and a spectrometer are selected for test items, according to the test items sent by the main control computer, one or more of the software version, timing signal, radio frequency signal, PG value, sensitivity and lobe performance of the radar are selected as test contents, according to the radar configuration, the test instrument and the test contents, and establishing a corresponding signal path in the signal conversion center, transmitting the signal to be tested to an instrument for testing, generating a test result data packet, and feeding back the test result data packet to the main control computer.

2. The complete machine automatic test system of the radar as recited in claim 1, wherein the signal conversion hub comprises:

the control panel receives a control instruction sent by a main control computer through the Ethernet adapter board to generate TTL level signals and control the on-off of different microwave switches to form different signal paths, the adjustable attenuator distributes the power of the signals, the direct current power supply supplies power to each unit, and the cable and the joint are connected with the inside of the center.

3. The automatic test system of the radar whole machine as claimed in claim 2, wherein the control board adopts a micro-program controller MCU as a main control chip, a complex programmable logic circuit CPLD is adopted to expand the number of control ports, the dynamic range of the adjustable attenuator is 0-70 decibels, and the connector adopts a stainless steel SMA-KFK adapter and an LAN port.

4. The automatic test system for radar complete machine according to any one of claims 1 to 3, characterized by further comprising: the system selects automatic control liquid cooling equipment and power supply equipment to work, liquid supply to the liquid cooling equipment is started, the liquid cooling sensor is used for monitoring liquid cooling flow in real time, power supply is supplied to the power supply equipment, and the voltage and current sensors are used for monitoring voltage and current in real time, so that environment monitoring is achieved.

5. The complete machine automatic test system of the radar as recited in claim 1, further comprising: the system sets the frequency points required by the sensitivity and PG value of the test signal, and the radar complete machine is enabled to work under the parameters.

6. The complete machine automatic test system of the radar as set forth in claim 1, wherein the sensitivity of the test signal comprises: establishing a radio frequency path from a signal source to a far-field horn in a signal conversion center, controlling a radar complete machine to receive a radio frequency signal from the far-field horn by a system, recording a power value output by the signal source if the signal reaches a check threshold and a critical value of detection probability, enabling Po to be the signal source output power value, L to be the sum of an attenuation value from the radar to the far-field horn and an attenuation value from the far-field horn to an instrument, G to be the far-field horn gain, H to be the radar gain, and Pr to be the sensitivity, and controlling a main control computer to perform the control according to Pr to Po-L plus

G + H calculated sensitivity.

7. The automatic test system for complete radar machines according to claim 1, wherein the PG value of the test signal comprises: a radio frequency path from a far-field loudspeaker to a frequency spectrograph is established in a signal conversion center, a system controls the far-field loudspeaker to receive a high-power radio frequency signal from a radar complete machine, P is the power value tested by the frequency spectrograph, and a main control computer calculates the PG value according to PG which is P-G + L.

Images