Pulse voltage signal generating device for representation of electrostatic force touch
A technology of tactile reproduction and pulse voltage, applied in the input/output of user/computer interaction, electrical digital data processing, input/output process of data processing, etc., can solve the limitation of adjustment range, single signal waveform, and low signal amplitude High-level problems, to achieve the effect of easy realization and rich changes
Inactive Publication Date: 2014-12-24
CHANGCHUN JIDA SCOLA
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Problems solved by technology
The control of the waveform frequency is mainly realized by mechanically driving variable elements such as capacitors or resonant cavities, and the adjustment range is greatly limited.
With the increasing development of digital technology, most signal generators no longer use mechanical drives but digital circuits. From a frequency reference to a variable frequency signal generated by a digital synthesis circuit, the modulation method becomes complicated.
Direct digital frequency synthesis (DDS) technology was proposed in the 1970s. This is a new frequency synthesis technology based on the concept of phase. However, since microelectronics technology and digital signal processing technology were not mature at that time, direct digital frequency synthesis technology also not taken seriously
[0004] Since the 1980s, all countries have been researching and developing their own DDS products, but the signal waveform output by the existing signal generator is relatively simple, the signal amplitude is not very high, and it is difficult to generate complex waveforms such as AM waves and Gaussian waves.
Method used
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[0020] The present invention includes: a waveform generating unit 101, a signal conditioning unit 102, a high-voltage amplifier 103, and a crystal oscillator 104;
[0021] The waveform generation unit 101 is sequentially electrically connected by an adder 1011, a phase register 1012, an adder 2 1013, and a data ROM 1014, wherein:
[0022] (1) Adder 1 1011: Receive the frequency control word sent by the controller and add it to the value in the phase register;
[0023] (2) Phase register 1012: store phase sequence code;
[0024] (3) Adder 2 1013: Receive the phase control word sent by the controller, make the phase information change linearly, and form a phase accumulator with the adder 1 and the phase register;
[0025] (4) Data ROM1014: connected to adder 2, and converts phase sequence codes into discrete amplitude sequence codes;
[0026] The signal conditioning unit 102 is electrically connected in sequence by a D / A digital-to-analog converter 1021, a low-pass filter 1023...
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The invention relates to a pulse voltage signal generating device for representation of an electrostatic force touch and belongs to the field of man-machine interaction and virtual reality. The pulse voltage signal generating device is formed by three parts of a waveform generating unit, a signal conditioning unit and a high voltage amplifying unit, wherein the waveform generating unit is formed by a phase accumulator consisting of two summators and a phase register, a data storage and a D / A (digital / analog) converter; the signal conditioning unit is formed by a low pass filter and a D / A controller; the high voltage amplifying unit takes a high voltage amplifying chip PA90 as a core. The pulse voltage generating device disclosed by the invention is mainly used for an electrostatic force touch representation system, can generate multiple waveforms such as sine waves, amplitude modulated waves and gauss waves, is simple in circuit and easy to realize, and has the characteristics of high frequency, high amplitude value, low power consumption, intelligence and adjustability.
Description
technical field [0001] The invention belongs to the fields of human-computer interaction and virtual reality, and specifically realizes a pulse voltage signal generation technology for tactile reproduction of electrostatic force. Background technique [0002] The tactile reproduction system based on electrostatic force is the frontier of research in the field of human-computer interaction and virtual reality. It is one of the best recognized forms of portable tactile reproduction devices, and it is also an important research direction at home and abroad. The first key task to realize this technology is to develop a pulse voltage signal generating device for the tactile reproduction device. [0003] The early signal generators were mainly realized by analog technology, with the help of resistors and capacitors, inductors and capacitors, resonant cavities, and coaxial lines as oscillation circuits to generate sine waves or other waveforms. The control of the waveform frequenc...
Claims
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Inventor 孙晓颖龙慧董杨瑞王庆龙吴赛文王婷婷燕学智陈建
Owner CHANGCHUN JIDA SCOLA