Detecting device and method for pulley position of electronci music instrument
A detection device and detection method technology, applied in the direction of using electric devices, measuring devices, electro-acoustic musical instruments, etc., can solve the problems of non-response area of pulley resistance 41, cost increase, etc.
Inactive Publication Date: 2007-01-24
HOLTEK SEMICON
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Its disadvantage is that it must be noted that the divided voltage of the pulley resistor 41 cannot exceed the maximum value of the input voltage of the analog / digital converter 49, otherwise it will all become the maximum conversion value of the analog / digital converter 49, causing the pulley resistor 41 to appear in an unresponsive zone
Basically, although this is the most direct method, the main control unit 40 will increase the cost due to the addition of an analog / digital converter 49
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[0033]The pulley position detection device and method of the present invention will be fully understood from the following examples, so that those skilled in the art can complete the present invention, but the present invention is not limited to the following examples.
[0034] The pulley position detection device of the present invention mainly includes a capacitor, which charges / discharges twice when the pulley moves, and a data processor, which is used to calculate the time and parameters required for each capacitor charge / discharge, and by The time and parameters are used with a pulley data and sound effect comparison table to determine the position of the pulley. For this capacitor and other charge / discharge related components, refer to Figure 5 , which is a configuration schematic diagram of a device for detecting pulley position using dual output / input ports and resistance and capacitance in a preferred embodiment. Figure 5 In addition to the capacitor 53, there is a...
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The present invention provides a kind of pulley position detecting device and method for use in electronic music instrument. The pulley position detecting device includes at least one capacitor capable of being charged / discharged for at least two times during shifting the pulley, and one data processor for calculating the time and parameter for each charge / discharge and judging the position of the pulley by means of pulley data / sound effect list. The pulley position detecting method using the capacitor and the pulley data / sound effect list includes the following steps: twice charging / discharging the capacitor during shifting the pulley, calculating the time and parameters for each charge / discharge and judging the position of the pulley based on the parameters and the pulley data / sound effect list.
Description
technical field [0001] The invention relates to a pulley position detection device and method, in particular to a pulley position detection device and method applied to electronic musical instruments. Background technique [0002] The pulley (Pitch wheel / stick) is an essential device for mid-to-high-end electronic pianos. Its mechanism uses a roller structure. The player can roll the pulley to different positions to produce the effect of raising and lowering the tone. The tremolo wheel (MOD wheel) ) can produce the effect of vibrating the volume of the sound. Generally, the I / O port of a general-purpose main control unit (MCU) is used to achieve the function of detecting the position of the pulley. However, the conventional I / O port method has the disadvantage of unstable detection, and then resorts to an analog-to-digital converter ( ADC) function of the main control unit, which not only increases the system cost, but also the detection method still needs to be carefully m...
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IPC IPC(8): G10H1/02G10H1/32G01D5/12G01B7/00
Inventor 王明坤
Owner HOLTEK SEMICON