CN109030986B - Method and system for testing phase shift accuracy of T/R components based on trigger function - Google Patents

Abstract

The invention discloses a method and system for testing the phase-shifting accuracy of a T/R component based on a trigger function. After each state phase shift command takes effect, output the measurement synchronization signal to the "external trigger input" port of the vector network analyzer to trigger the scan, monitor the measurement completion signal of the "external trigger ready" port of the vector network analyzer in real time, and measure the current vector network analyzer. The completion signal is used as the next state phase shift instruction start signal. Beneficial effects of the invention: the number of times of reading the test data of the vector network analyzer under the program control of the invention is changed from 64 times to 1 time, which improves the test efficiency.

Description

Method and system for testing phase shift accuracy of T/R components based on trigger function

technical field

The invention relates to the technical field of testing, in particular to a method and system for testing the phase-shifting accuracy of a T/R component based on a trigger function.

Background technique

Phase shift accuracy is an important indicator to measure T/R components. At present, the program-controlled state controller of the industrial computer and the vector network analyzer are generally used for coordination. The flow of the traditional phase-shifting accuracy test system is shown in Figure 1. The program-controlled vector network analyzer inputs the excitation signal to the T/R component, and the program-controlled state controller Perform phase-shifting operation on the T/R component, the program-controlled vector network analyzer starts scanning, and the program-controlled vector network analyzer obtains the single-state phasor test data after the scanning is over. Repeat the 64-state phase shift test.

During the above test process, the industrial computer needs to communicate with the instrument (state controller, vector network analyzer) 3 times in a single phase state, and 192 (3×64) times in 64 states. Frequent communication between analyzers severely reduces test efficiency. In addition, the T/R components often generate a large amount of heat during operation, and the lengthy test time will introduce temperature drift, which will have a great impact on the test accuracy.

Therefore, in the automatic test of the T/R component phase-shifting accuracy, the current traditional method requires the IPC to perform phase-shifting operations on the T/R component multiple times by the program-controlled state controller, and the program-controlled vector network analyzer completes the scan and obtains the test data. The frequent communication between the industrial computer, the state controller and the vector network analyzer seriously reduces the test efficiency.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention proposes a method and system for testing the phase-shifting accuracy of T/R components based on a trigger function, which utilizes the preset phase-shifting command group of the state controller to control the phase-shifting operation of the T/R components to replace the industrial computer for many times. A programmable state controller performs phase shifting operations on the T/R components.

In order to achieve the above object, the present invention adopts the following technical solutions:

The first object of the present invention is to disclose a T/R component phase-shifting accuracy test method based on a trigger function, including:

After receiving the phase-shifting start command, the state controller continuously outputs N-state phase-shifting commands to the T/R component, and inputs the measurement synchronization signal to the "external trigger input" port of the vector network analyzer after each state phase-shifting command takes effect. Scan, monitor the measurement completion signal of the "external trigger ready" port of the vector network analyzer in real time, and use the measurement completion signal of the vector network analyzer as the start signal of the next state phase shift instruction.

Further, the specific implementation method is as follows:

(1) Set the scanning mode and the number of scanning points of the vector network analyzer; set the triggering mode and triggering range of the vector network analyzer;

(2) The initial phasor state of the program-controlled T/R component is used as the ground state to normalize the vector network analyzer;

(3) After receiving the phase-shifting start command, the state controller completes the phase-shifting operation on the T/R component, and sends a measurement synchronization signal to the "external trigger input" port of the vector network analyzer;

(4) The vector network analyzer performs the first phase-shift state test;

(5) The state controller outputs the next state phase shift command to the T/R component after monitoring the "external trigger ready" measurement completion signal of the vector network analyzer;

(6) Repeat steps (3)-(5) until all phase-shift state tests are completed.

Further, the scanning mode of the vector network analyzer is set as point frequency scanning.

Further, set the trigger mode of the vector network analyzer to external, the trigger range to channel, the trigger mode to point trigger, and the trigger to be set to single.

Further, all the phase-shifted state test data are temporarily stored in the vector network analyzer, and the IPC obtains all the phase-shifted state test data temporarily stored in the vector network analyzer by one-time program control.

The second object of the present invention is to disclose a state controller for phase-shifting accuracy test, which is connected with the T/R component to perform phase-shifting operation on the T/R component; it is characterized in that the state controller is provided with two additional channels TTL control signal, one way is connected to the "external trigger input" port of the vector network analyzer, and the other is connected to the "external trigger ready" port of the vector network analyzer.

Further, N groups of phase shifting instructions are preset in the state controller, where N is a set integer value.

The third object of the present invention is a T/R component phase-shifting precision test system based on a trigger function, including: an industrial computer, the above-mentioned state controller for performing phase-shifting precision testing, a vector network analyzer, and a T/R component; The industrial computer communicates with the state controller through the LAN bus; the vector network analyzer communicates with the T/R component by radio frequency signal; the state controller communicates with the vector network analyzer and the T/R component respectively.

Further, the state controller continuously outputs N-state phase-shifting commands to the T/R component after receiving the phase-shifting start command of the industrial computer, and sends N-state phase-shifting commands to the "external trigger input" port of the vector network analyzer after each state phase-shifting command takes effect. Output the measurement synchronization signal to trigger the scan, monitor the measurement completion signal of the "external trigger ready" port of the vector network analyzer in real time, and use the measurement completion signal of the vector network analyzer as the start signal of the next state phase shift command.

The beneficial effects of the present invention are:

1. The present invention converts the cooperation test between the industrial computer, the state controller and the vector network analyzer into the cooperation test between the state controller and the vector network analyzer, which simplifies the test composition;

2. The present invention converts the triggering of the vector network analyzer from the original IPC program-controlled command triggering to the TTL level triggering of the controller to speed up the triggering speed;

3. The present invention converts passively blindly waiting for the completion of scanning by the vector network analyzer to actively monitor the completion of scanning, thereby indirectly speeding up the scanning speed;

4. The number of times of reading the test data of the vector network analyzer under the program control of the industrial computer of the present invention is changed from 64 times to 1 time, which improves the test efficiency;

5. The present invention greatly improves the influence of temperature drift on the test results by accelerating the test speed.

Description of drawings

Fig. 1 is a flow chart of the method for testing the phase-shifting accuracy of T/R components in the prior art;

Fig. 2 is the flow chart of the T/R component phase-shifting precision test method based on the trigger function of the present invention;

FIG. 3 is a schematic structural diagram of the phase-shifting precision test of the T/R component based on the trigger function of the present invention.

Detailed ways:

The present invention will be further described below with reference to the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

Based on the frequent communication between the industrial computer, the state controller and the vector network analyzer in the prior art, the test efficiency is seriously reduced, and the T/R components often generate a large amount of heat during operation, and the lengthy test time will introduce temperature drift. , the problem of causing a greater impact on the test accuracy, the present invention discloses a T/R component phase-shifting accuracy test method based on a trigger function, the core idea of which is:

After receiving the phase-shifting start command, the state controller continuously outputs N-state phase-shifting commands to the T/R component, and inputs the measurement synchronization signal to the "external trigger input" port of the vector network analyzer after each state phase-shifting command takes effect. Scan, monitor the measurement completion signal of the "external trigger ready" port of the vector network analyzer in real time, and use the measurement completion signal of the vector network analyzer as the start signal of the next state phase shift instruction.

The T/R component phase-shifting accuracy test method based on the trigger function of the present invention is shown in Figure 2, and the detailed setting and execution process is as follows:

1) Set the scanning mode of the vector network analyzer to point frequency and the number of scanning points to 64;

2) Set the trigger mode of the vector network analyzer to external, the trigger range to channel, the trigger mode to point trigger, and the trigger to set to single;

3) The phasor of the program-controlled T/R component is 0°, and the vector network analyzer is normalized with this state as the ground state;

4) The IPC sends the phase-shifting start command to the state controller;

5) After the state controller completes the phase shifting operation on the T/R component, it sends a measurement synchronization signal to the "external trigger input" port of the vector network analyzer;

6) The vector network analyzer conducts the first phase-shift state test;

7) The state controller outputs the next state phase-shifting command after monitoring the "external trigger ready" port measurement completion signal of the vector network analyzer;

8) The state controller and the vector network analyzer independently cooperate to complete other 63 state tests according to steps 5), 6) and 7);

9) After the test is completed, the channel enters the Hold mode;

10) Obtain the 64-state phase value of the vector network analyzer at one time through process control.

In order to realize the above method, the present invention needs to carry out the following transformation to the state controller:

Two TTL control signals are added to the state controller hardware, one is connected to the "external trigger input" port of the vector network analyzer, and the other is connected to the "external trigger ready" port of the vector network analyzer.

64 groups of phase shift instructions are preset on the controller firmware program. The state controller continuously outputs 64-state phase-shifting instructions to the T/R component after receiving the IPC phase-shifting start instruction. During the period, after each phase-shift command takes effect, output the measurement synchronization signal to the "external trigger input" port of the vector network analyzer to trigger the scan, and the state controller listens to the "external trigger ready" measurement completion signal of the vector network analyzer as the next state phase-shift command to start. Signal.

In order to realize the above method, the present invention discloses a T/R component phase-shifting accuracy test system based on a trigger function, the structure of which is shown in Figure 3, including:

Industrial computer, state controller, vector network analyzer and T/R components; industrial computer communicates with state controller and vector network analyzer through LAN bus; vector network analyzer communicates with T/R components for RF signal; state control The device communicates with the vector analyzer and the T/R component respectively;

The invention converts the coordination test among the industrial computer, the state controller and the vector network analyzer in the prior art into the cooperation test between the state controller and the vector network analyzer, which simplifies the test composition and improves the performance of the test. Test efficiency and precision.

The present invention utilizes the preset phase-shift command group of the state controller to control the phase-shift operation of the T/R component to replace the multiple program-controlled state controllers of the industrial computer to perform the phase-shift operation on the T/R component;

The invention uses the state controller TTL trigger signal to replace the trigger command of the industrial computer to control the trigger scan of the vector network analyzer;

The invention uses the state controller to monitor the "external trigger ready" port measurement completion signal of the vector network analyzer to replace blindly waiting for the scanning end of the vector network analyzer;

The invention uses the internal temporary storage function of the vector network analyzer to replace the frequent data communication between the industrial computer and the vector network analyzer.

It should be noted that the testing method of the present invention is applicable to the technical field of attenuation accuracy testing in addition to the phase-shifting accuracy testing technical field given in the present invention.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the scope of protection of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, those skilled in the art do not need to pay creative efforts. Various modifications or deformations that can be made are still within the protection scope of the present invention.

Claims (8)

1. based on the T/R component phase-shifting accuracy test method of trigger function, it is characterized in that, comprising: After receiving the phase-shifting start command, the state controller continuously outputs N-state phase-shifting commands to the T/R component, and outputs measurement synchronization signals to the external trigger input port of the vector network analyzer to trigger scanning after each state phase-shifting command takes effect. Monitor the measurement completion signal of the external trigger ready port of the vector network analyzer in real time, and use the measurement completion signal of the vector network analyzer as the start signal of the next state phase-shift instruction; The specific implementation method is as follows: (1) Set the scanning mode and the number of scanning points of the vector network analyzer; set the triggering mode and triggering range of the vector network analyzer; (2) The initial phasor state of the program-controlled T/R component is used as the ground state to normalize the vector network analyzer; (3) After receiving the phase-shifting start command, the state controller completes the phase-shifting operation on the T/R component, and sends a measurement synchronization signal to the external trigger input port of the vector network analyzer; (4) The vector network analyzer performs the first phase-shift state test; (5) The state controller outputs the next state phase-shifting command after monitoring the measurement completion signal of the external trigger ready port of the vector network analyzer; (6) Repeat steps (3)-(5) until all phase-shift state tests are completed. 2 . The method for testing the phase-shifting accuracy of T/R components based on a trigger function as claimed in claim 1 , wherein the scanning mode of the vector network analyzer is set as point-frequency scanning. 3 . 3. the T/R component phase-shifting accuracy test method based on trigger function as claimed in claim 1, is characterized in that, setting the vector network analyzer trigger mode to be external, the trigger range is channel, the trigger mode is point trigger, and the trigger is set for a single time. 4. the T/R component phase-shifting accuracy test method based on trigger function as claimed in claim 1, is characterized in that, all phase-shifting state test data are temporarily stored in the vector network analyzer, and the state controller obtains the vector network analysis at one time All phase-shift state test data temporarily stored in the instrument. 5. the state controller for carrying out the phase-shifting precision test adopts the T/R component phase-shifting precision test method based on the trigger function as described in any one of claims 1-4, and is connected with the T/R component to the T/R component. The R component performs phase-shifting operation; it is characterized in that the state controller adds two TTL control signals, one is connected to the "external trigger input" port of the vector network analyzer, and the other is connected to the "external trigger ready" port of the vector network analyzer port. 6 . The state controller according to claim 5 , wherein N groups of phase shifting instructions are preset in the state controller, wherein N is a set integer value. 7 . 7. The T/R component phase-shifting precision test system based on trigger function is characterized in that, comprising: industrial computer, the state controller for carrying out phase-shifting precision test according to any one of claims 5-6, vector network analyzer and T/R component; the industrial computer communicates with the state controller through the LAN bus; the vector network analyzer communicates with the T/R component for radio frequency signal communication; the state controller communicates with the vector network analyzer and the T/R component /R components communicate separately. 8. The T/R component phase-shifting accuracy test system based on the trigger function as claimed in claim 7, wherein the state controller continuously outputs N-state shift to the T/R component after receiving the IPC phase-shifting start instruction phase command, and output the measurement synchronization signal to the external trigger input port of the vector network analyzer after each state phase-shift command takes effect. The measurement completion signal is used as the next state phase shift command start signal.

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