Multi-channel high-precision PWM signal sampling and generation device

A PWM signal and generation device technology, applied in the field of signal modulation, to achieve the effect of reducing the bit width

Inactive Publication Date: 2014-04-30
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a multi-channel high-precision PWM signal sampling and generating device, which is easy to flexibly expand the number of channels, solves the problem of n

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Embodiment Construction

[0031] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] Such as figure 1 Multi-channel high-precision PWM signal sampling and generating device of the present invention at least comprise bus transceiver 1, crystal oscillator 2, microprocessor 3, FPGA chip 4 and bus transceiver 5, it is characterized in that described FPGA chip 4 comprises at least: PLL clock frequency multiplication module 401, clock frequency division module 402, PWM period sampling module 403, PWM pulse width sampling module 1 (404), PWM sampling register group 406, PWM generation latch group 407, PWM signal generation module 1 (408 ), decoding interface module 410, can also include PWM pulse width sampling module n (405) and PWM signal generation module m (409), these circuits are to realize by hardware description language Verilog HDL programming;

[0033] The input terminal of the bus transceiver 1 is connected to...

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Abstract

The invention discloses a multi-channel high-precision PWM signal sampling and generation device. The multi-channel high-precision PWM signal sampling and generation device at least comprises a bus transceiver, a crystal oscillator, a microprocessor and an FPGA chip. The FPGA chip at least comprises a PLL clock frequency multiplication module, a clock frequency division module, a PWM period sampling module, PWM pulse width sampling modules, a PWM sampling register bank, a PWM generation latch set, PWM signal generation modules and a decoding interface module, wherein the PWM period sampling module, the PWM pulse width sampling modules and the PWM signal generation modules are respectively provided with a us counter and two ns counters, the us counters and the ns counters are used for carrying out coarse counting and fine counting, and high-precision PWM sampling and high-precision PWM generation are achieved; the PWM sampling register bank can carry out synchronous latching on data, and the PWM generation latch set can carry out synchronous output of the data. When the multi-channel high-precision PWM signal sampling and generation device is adopted, PWM sampling and generation precision can be improved, and can reach the ns level, PWM sampling and generation channels can be easily extended, and the multi-channel high-precision PWM signal sampling and generation device is applicable to systems such as an unmanned aerial vehicle flight control system with the requirement for the PWM sampling and generation function.

Description

technical field [0001] The invention relates to the technical field of signal modulation, in particular to a multi-channel high-precision PWM signal sampling and generating device. Background technique [0002] PWM (Pulse Width Modulation) technology has been widely used in many fields such as industrial automation, robotics, precision CNC machine tools, and aerospace. The servo motor control system needs to generate PWM signals with variable duty ratios to drive power devices such as IGBTs and IPMs; motion control systems such as robots or CNC machine tools, between the motion control card and the servo driver, can be transmitted through PWM signals with variable frequency Position control command; unmanned aerial vehicle system, actuator - the steering gear needs PWM signal with variable pulse width (that is, duty cycle), and the unmanned aerial vehicle system with autonomous take-off and landing or formation flight function needs high-precision sampling remote control rec...

Claims

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Application Information

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IPC IPC(8): H03K7/10
Inventor 丑武胜黄海明
Owner BEIHANG UNIV
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