Haptic communication system using cutaneous actuators for simulation of continuous human touch
摘要
說明書
The band pass filters 1844 decompose the sensor signals 1806 into frequency bands 1846. For example, an array of band-pass filters 1844 that span the speech spectrum may be used to decompose the sensor signals 1806 into the frequency bands 1846. Each band-pass filter passes frequencies within a certain range and rejects (attenuates) frequencies outside that range. The band pass filters 1844 may be constructed using an analog resistor-inductor-capacitor circuit or digital filters that perform mathematical operations on the sampled sensor signals 1806. For example, an analog-to-digital converter may be used to sample the sensor signals 1806, followed by a microprocessor and peripheral components such as memory to store data and filter coefficients, etc. Finally a digital-to-analog converter completes the output stage.
The amplitude detector 1848 detects an amplitude of each frequency band 1846. The amplitude detector 1848 may be an electronic circuit that takes the frequency bands 1846 as input and provides an output which is the envelope of each frequency band 1846. For example, the amplitude detector 1848 may include a level controller to determine the amplitude range of each frequency band. The amplitude detector 1848 may include a capacitor to store up charge on the rising edges of each frequency band signal, and release it through a resistor when the signal falls. The amplitudes and frequency bands 1846 make up the parameters 1852 used to generate the actuator signals 1818.
