Crossed coil meter driving device having a plurality of input parameters
First Claim
1. A meter driving device for driving a cross coil meter which indicates angular directions corresponding to input values, comprising:
- (a) a clock generating means for generating basic clock signals;
(b) a frequency calculating means for calculating input pulse signal frequency which provides the input value for indicating the angular direction;
(c) a memory means for memorizing, as parameters, a plurality of input values Sm (m=1, 2, . . . ), angular directions θ
m corresponding to the input values Sm, and coefficients Rm representative of the grades of the change in angular direction depending on the change between adjacent two input values Sm and Sm+1 among the plurality of input values;
(d) a calculating means for calculating the angular direction corresponding to the input value, on the basis of the input pulse signal frequency obtained by said frequency calculating means and of the parameters read out from said memory means, and for outputting an angular direction signal;
(e) a driving means, having a power source, for energizing a first and a second mutually crossed coils based on the outputted angular direction signal.
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Abstract
A meter driving device for indicating angular positions corresponding to input values. The device includes a memory for storing previously given input values, angular directions corresponding to the input values, and coefficients representative of the grades of change in angular direction depending on the change between adjacent two input values, as parameters. Based on these parameters and the frequency of input pulse signal giving the input values, the angular direction corresponding thereto is calculated. The angular direction signal receives PWM process and then supplies to a pair of crossed exciting coils via a driver. During a predetermined time period from the turning ON and OFF of the power source, the transference of the angular direction signals to the driver is shut out by logic gates, thereby inhibiting malfunctional meter indication.
227 Citations
6 Claims
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1. A meter driving device for driving a cross coil meter which indicates angular directions corresponding to input values, comprising:
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(a) a clock generating means for generating basic clock signals; (b) a frequency calculating means for calculating input pulse signal frequency which provides the input value for indicating the angular direction; (c) a memory means for memorizing, as parameters, a plurality of input values Sm (m=1, 2, . . . ), angular directions θ
m corresponding to the input values Sm, and coefficients Rm representative of the grades of the change in angular direction depending on the change between adjacent two input values Sm and Sm+1 among the plurality of input values;(d) a calculating means for calculating the angular direction corresponding to the input value, on the basis of the input pulse signal frequency obtained by said frequency calculating means and of the parameters read out from said memory means, and for outputting an angular direction signal; (e) a driving means, having a power source, for energizing a first and a second mutually crossed coils based on the outputted angular direction signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification