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High-speed DA-based multi-channel signal high-precision synchronous control method and device

A high-precision synchronization and control method technology, which is applied in general control systems, program control, computer control, etc., to achieve the effects of ensuring consistency, high-speed multi-channel signal synchronization, and improving control accuracy

Inactive Publication Date: 2019-01-11
WEIHAI WEIGAO ELECTRONICS ENG
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Problems solved by technology

[0005] The present invention aims at the technical problem that the existing technology cannot realize high-precision control of multi-channel signals under the condition of ensuring phase consistency; it provides a high-speed system based on high-speed DA multi-channel signal high-precision synchronous control method and device

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  • High-speed DA-based multi-channel signal high-precision synchronous control method and device

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the examples.

[0031] Such as figure 1 As shown, the present invention discloses a multi-channel signal high-precision synchronous control method based on multi-chip high-speed DA, and the specific steps are:

[0032] Step 1, generate calibration signal:

[0033] The multi-channel low-frequency fixed-frequency signal generated by multiple FPGAs is used as a calibration signal, which is convenient for subsequent use of general oscilloscopes to measure the time difference of multi-channel signals;

[0034] Step 2, measuring the time difference between channels;

[0035] The time difference between channels is measured with a multi-channel oscilloscope, and the delay required for each channel is obtained by testing the time advance of the pulse front on each channel relative to the pulse front of the latest channel;

[0036] Step 3, calculate the calibration value:

[0037] Multiply the delay am...

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Abstract

The invention provides a high-speed DA-based multi-channel signal high-precision synchronous control method and device, and solves the technical problem that an existing technology cannot realize high-precision control on multi-channel signals under the condition of ensuring the phase consistency. The method comprises the following steps of 1, generating a calibration signal; 2, measuring a time difference between channels: testing a time advance of a pulse front edge on each channel relative to a pulse front edge of the latest channel to obtain a delay quantity needed by each channel; 3, calculating a calibration value: multiplying the delay quantity by a sampling frequency of DA and performing rounding to obtain the calibration value of each channel; 4, performing synchronous fine adjustment and calibration: performing time delay of the corresponding calibration value on a signal generation unit by a fine adjustment and calibration module in an FPGA; and 5, generating the multi-channel signals synchronously. The control method and device is widely applied to the field of multi-radiation signal source signal synchronization.

Description

technical field [0001] The invention relates to a multi-channel signal synchronous control method, in particular to a high-speed DA-based multi-channel signal high-precision synchronous control method and device. Background technique [0002] With the rapid development of signal and information processing technology, multi-channel signal generation technology is widely used in military, industrial, aviation and other fields. With the increasingly complex application scenarios, in terms of radar signal simulation, the most important part of radar signal simulation is the D / A conversion chip. For the simulation of multi-channel signals, the requirements for synchronization are constantly increasing. How to further improve the synchronization between high-speed DA multi-channel signals has always been an important research direction in the field of radar signal simulation. [0003] At present, the analog generation and counting of multi-radiation source radar signals, in terms...

Claims

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Application Information

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IPC IPC(8): G05B19/042G01S7/40
CPCG01S7/4052G05B19/0428G05B2219/2612
Inventor 杨树慧符士华廉斌王彩玲贾丽华
Owner WEIHAI WEIGAO ELECTRONICS ENG
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