CN204066013U - A kind of pulse voltage signal generating apparatus for electrostatic force tactile sense reproduction - Google Patents

Abstract

The utility model relates to a kind of pulse voltage signal generating apparatus for electrostatic force tactile sense reproduction, belongs to man-machine interaction and field of virtual reality.Be made up of three parts: the wave generating unit that the phase accumulator be made up of two totalizers and phase register, data-carrier store, D/A converter form; The signal condition unit be made up of low-pass filter and D/A controller; With the high voltage amplifier unit that high voltage amplifier chip PA90 is core.Disclosed in the utility model, pulse voltage signal generating apparatus is mainly used in electrostatic force tactile representation system, the multiple waveforms such as sine wave, modulated wave, high bass wave can be produced, circuit is simple, is easy to realize, and has high-frequency, amplitude, low-power consumption and the adjustable feature of intelligence.

Description

A kind of pulse voltage signal generating apparatus for electrostatic force tactile sense reproduction

Technical field

The utility model belongs to man-machine interaction and field of virtual reality, a kind of pulse voltage signal generation technique for electrostatic force tactile sense reproduction of specific implementation.

Background technology

Based on the forward position that electrostatic force tactile representation system is contemporary man-machine interaction and field of virtual reality research, being realize one of generally acknowledged best form of portable touch sense-reproducing device, is also the important directions that Present Domestic is studied outward.And the primary mission critical realizing this technology is exactly to work out the pulse voltage signal generating apparatus acting on this tactile representation device.

Early stage signal generator mainly utilizes analogue technique to realize, and by resistance capacitance, inductance capacitance, resonator cavity, coaxial cable produce sinusoidal wave or other waveforms as concussion loop.And the control of waveform frequency is mainly realized by Mechanical Driven variable element such as capacitor or resonator cavity, range of adjustment is limited by very large.Growing along with digital technology, most signal generator no longer adopts Mechanical Driven but digital circuit, develops into from a frequency reference variable frequency signal produced by Digital synthesis circuit, and modulation system also becomes complicated.Direct digital synthesis technique (DDS) technology proposes at the seventies, this is a kind of from phase place concept novel frequency synthetic technology, but because microelectric technique and Digital Signal Processing were all immature at that time, direct digital frequency synthesis technology is not also paid attention to.

Since the eighties, each state is all developing and is developing respective DDS product, but the signal waveform that existing signal generator exports is more single, and the amplitude of signal neither be very high, and is difficult to produce modulated wave, the complicated wave forms such as high bass wave.The pulse voltage signal generating means of the utility model design not only can produce the multiple waveforms such as modulated wave, high bass wave, sine wave, and frequency range is comparatively wide, and the peak-to-peak value of signal is higher, and frequency, waveform and amplitude are all that intelligence is adjustable within the specific limits.The test of electrostatic force tactile representation system is by changing the driving voltage be loaded on the electrically conducting transparent pole plate of tactile sense reproduction panel, change the upper induced charge of finger and the electrostatic force suffered by finger, thus change friction force all when finger slides on sense of touch panel, finger skin is stressed and be out of shape, thus experiences corresponding touch feeling.In order to can be finer and smoother various texture is embodied by sense of touch, the voltage signal be applied on electrically conducting transparent pole plate must have and changes more galore, therefore, the pulse voltage signal generating means of the utility model design is applicable to electrostatic force tactile representation system completely.

Summary of the invention

The utility model provides a kind of pulse voltage signal generating apparatus for electrostatic force tactile sense reproduction, object produces the multiple waveforms such as sine wave, square wave, triangular wave, sawtooth wave, modulated wave, pulsating wave, high bass wave, frequency range is 10Hz ~ 20KHz, peak-to-peak value is 10V ~ 400V, apply to electrostatic force tactile representation system, for electrostatic force tactile representation device provides various stable pumping signal.

The technical scheme that the utility model is taked is: comprising: wave generating unit, signal condition unit, high-voltage amplifier, crystal oscillator;

Described wave generating unit is by totalizer one, phase register, totalizer two, the electrical connection of data ROM order, wherein:

(1) totalizer one: receive the frequency control word that controller sends, and be added with the value in phase register;

(2) phase register: store phase sequence code;

(3) totalizer two: receive the phase control words that controller sends, phase information is linearly changed, and forms a phase accumulator with totalizer one, phase register;

(4) data ROM: be connected with totalizer two, and convert phase sequence code to discrete amplitude sequence code;

Described signal condition unit is by D/A digital to analog converter, low-pass filter, the electrical connection of D/A amplitude controller order, wherein:

(1) D/A digital to analog converter: convert the amplitude sequence code stored in data ROM to simulating signal;

(2) low-pass filter 1023: the harmonic wave in filtered signal and spike, obtains comparatively level and smooth waveform;

(3) D/A amplitude controller 1022: the reference voltage changing D/A chip, realizes the control to amplitude;

High voltage amplifier unit is connected with D/A amplitude controller: be realize with high voltage amplifier chip PA90, the peak-to-peak value of signal is amplified to 400V;

Crystal oscillator is connected with phase register, D/A digital to analog converter, D/A amplitude controller respectively.

The pulse voltage signal generating means of the utility model design not only can the multiple waveforms such as sine wave, square wave, triangular wave, sawtooth wave, modulated wave, pulsating wave, high bass wave, frequency range is 20-20KHz, the peak value of signal is up to 400V, whole process easily realizes, circuit is simply easy to integrated, and frequency, waveform and amplitude are all that intelligence is adjustable within the specific limits.The test of electrostatic force tactile representation system is by changing the driving voltage be loaded on the electrically conducting transparent pole plate of tactile sense reproduction panel, change the upper induced charge of finger and the electrostatic force suffered by finger, thus change friction force all when finger slides on sense of touch panel, finger skin is stressed and be out of shape, thus experiences corresponding touch feeling.In order to can be finer and smoother various texture is embodied by sense of touch, the voltage signal be applied on electrically conducting transparent pole plate must have and changes more galore, therefore, the pulse voltage signal generating means of the utility model design is applicable to electrostatic force tactile representation system completely.

Accompanying drawing explanation

Fig. 1 is schematic block circuit diagram of the present utility model.

Embodiment

The utility model comprises: wave generating unit 101, signal condition unit 102, high-voltage amplifier 103, crystal oscillator 104;

Described wave generating unit 101 is by totalizer 1, phase register 1012, totalizer 2 1013, the electrical connection of data ROM1014 order, wherein:

(1) totalizer 1: receive the frequency control word that controller sends, and be added with the value in phase register;

(2) phase register 1012: store phase sequence code;

(3) totalizer 2 1013: receive the phase control words that controller sends, phase information is linearly changed, and forms a phase accumulator with totalizer one, phase register;

(4) data ROM1014: be connected with totalizer two, and convert phase sequence code to discrete amplitude sequence code;

Described signal condition unit 102 is by D/A digital to analog converter 1021, low-pass filter 1023, the electrical connection of D/A amplitude controller 1022 order, wherein:

(1) D/A digital to analog converter 1021: convert the amplitude sequence code stored in data ROM to simulating signal;

(2) low-pass filter 1023: the harmonic wave in filtered signal and spike, obtains comparatively level and smooth waveform;

(3) D/A amplitude controller 1022: the reference voltage changing D/A chip, realizes the control to amplitude;

High voltage amplifier unit 103 is connected with D/A amplitude controller 1022: be realize with high voltage amplifier chip PA90, the peak-to-peak value of signal is amplified to 400V;

Crystal oscillator 104 is connected with phase register 1012, D/A digital to analog converter 1021, D/A amplitude controller 1022 respectively.

Circuit working principle: totalizer one and totalizer two receive the frequency control word and phase control words that dsp controller sends respectively, numerical value in totalizer one and totalizer two is added with the numerical value stored in phase accumulator, and add up according to the initial value in phase register, if the figure place of phase register is N, so through 2 ⁿbe back to initial value after the individual clock period, crystal oscillator 104 is then for phase accumulator, D/A converter and D/A controller provide reference clock; What totalizer two exported is a series of phase sequence code information, data ROM converts phase sequence code information to amplitude sequence code information, convert discrete amplitude sequence code information to simulating signal by D/A converter, then filtering process is carried out to simulating signal; D/A controller is mainly controlled by the amplitude of reference voltage to signal of change, realizes the intelligence of signal amplitude adjustable; In order to realize finer and smoother touch feeling, needing amplitude and the wide pumping signal of variation range, therefore utilizing high-voltage amplifier that the voltage signal amplitude that D/A controller exports is amplified to 400V.

Claims (1)

1. for a pulse voltage signal generating apparatus for electrostatic force tactile sense reproduction, it is characterized in that comprising: wave generating unit, signal condition unit, high-voltage amplifier, crystal oscillator;

Described wave generating unit is by totalizer one, phase register, totalizer two, the electrical connection of data ROM order, wherein:

(1) totalizer one: receive the frequency control word that controller sends, and be added with the value in phase register;

(2) phase register: store phase sequence code;

(3) totalizer two: receive the phase control words that controller sends, phase information is linearly changed, and forms a phase accumulator with totalizer one, phase register;

(4) data ROM: be connected with totalizer two, and convert phase sequence code to discrete amplitude sequence code;

Described signal condition unit is by D/A digital to analog converter, low-pass filter, the electrical connection of D/A amplitude controller order, wherein:

(1) D/A digital to analog converter: convert the amplitude sequence code stored in data ROM to simulating signal;

(2) low-pass filter 1023: the harmonic wave in filtered signal and spike, obtains comparatively level and smooth waveform;

(3) D/A amplitude controller 1022: the reference voltage changing D/A chip, realizes the control to amplitude;

High voltage amplifier unit is connected with D/A amplitude controller, and crystal oscillator is connected with phase register, D/A digital to analog converter, D/A amplitude controller respectively.