Method for identifying and interrogating the measured value of the velocity or speed of an object
First Claim
1. A method for identifying and interrogating a measured value M of velocity of speed of an object, comprising the steps of:
- providing a sensor that generates a respective measuring pulse when the object moves through a path interval of a fixed size;
providing a clock generator for generating clock pulses having a constant clock frequency, and providing a clock counter connected to the clock generator;
calculating a sum of the measuring pulses as a measuring pulse sum Si in a measuring interval that is limited by a first and by a last measuring pulse;
calculating a sum of the clock pulses as a clock pulse sum St during said measuring interval;
calculating a new value of measured value M for each measuring interval from said measuring pulse sum Si and said clock pulse sum St;
providing initialization instructions;
upon arrival of every measuring pulse and at every initialization instruction reading a counter reading z of said clock counter and allocating it to a respective triggering event;
storing a counter reading z allocated to the initialization instruction and to a first, following measuring pulse as an initial value za, said initial value za being an initial value of a measuring interval and of an interrogation interval that begins therewith;
storing a counter reading z allocated to every following measuring pulse as a final value ze, whereby every new counter reading overwrites a preceding counter reading; and
for a measured value call-inending the measuring interval with a last measuring pulse,using a difference between the final value ze and the initial value za as said clock pulse sum St, andstoring the final value ze as a new initial value za if the measuring pulse sum Si is greater than 1 and less than a maximum value Simax.
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Accused Products
Abstract
A method for identifying a measured value of a velocity or speed of an object where a measured value call-in can occur at any time. A chronological spacing of measuring pulses of a speed sensor is measured and a measured value is formed therefrom. The measurement is carried out until either a measured value call-in occurs, a maximum number of measuring pulses is registered, or a maximum measuring duration is exceeded. When no measuring pulse or only one measuring pulse is registered, a distinction is made in the formation of the measured value as to whether a measuring duration corresponding to a minimum velocity or minimum speed is upwardly or downwardly crossed. An initial counter reading is stored at every measuring start and at every first registered measured pulse. A final counter reading is stored at every further registered measuring pulse until either a measured value call-in occurs or the maximum measuring duration is exceeded. The time interval lying between the initial counter reading and the final counter reading forms the basis for the calculation of the measured value.
19 Citations
11 Claims
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1. A method for identifying and interrogating a measured value M of velocity of speed of an object, comprising the steps of:
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providing a sensor that generates a respective measuring pulse when the object moves through a path interval of a fixed size; providing a clock generator for generating clock pulses having a constant clock frequency, and providing a clock counter connected to the clock generator; calculating a sum of the measuring pulses as a measuring pulse sum Si in a measuring interval that is limited by a first and by a last measuring pulse; calculating a sum of the clock pulses as a clock pulse sum St during said measuring interval; calculating a new value of measured value M for each measuring interval from said measuring pulse sum Si and said clock pulse sum St; providing initialization instructions; upon arrival of every measuring pulse and at every initialization instruction reading a counter reading z of said clock counter and allocating it to a respective triggering event; storing a counter reading z allocated to the initialization instruction and to a first, following measuring pulse as an initial value za, said initial value za being an initial value of a measuring interval and of an interrogation interval that begins therewith; storing a counter reading z allocated to every following measuring pulse as a final value ze, whereby every new counter reading overwrites a preceding counter reading; and for a measured value call-in ending the measuring interval with a last measuring pulse, using a difference between the final value ze and the initial value za as said clock pulse sum St, and storing the final value ze as a new initial value za if the measuring pulse sum Si is greater than 1 and less than a maximum value Simax. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for identifying and interrogating a measured value M of velocity or speed of an object, comprising:
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sensor means for generating a respective measuring pulse when the object moves through a path interval of a fixed size; clock generator means for generating clock pulses having a constant clock frequency; a clock counter means connected to the clock generator means; means for calculating a sum of the measuring pulses as a measuring pulse sum Si in a measuring interval that is limited by a first and by a last measuring pulse; means for calculating a sum of the clock pulses as a clock pulse sum St during said measuring interval; means for calculating a new value of measured value M for each measuring interval from said measuring pulse sum Si and said clock pulse sum St; means for providing initialization instructions; means for reading a counter reading z of said clock counter means and allocating it to a respective triggering event upon arrival of every measuring pulse and at every initialization instruction; means for storing a counter reading z allocated to the initialization instruction and to a first, following measuring pulse as an initial value za, said initial value za being an initial value of a measuring interval and of an interrogation interval that begins therewith; means for storing the counter reading z allocated to every following measuring pulse as a final value ze, whereby every new counter reading overrides a preceding counter reading; and means for a measured value call-in means ending the measured interval with a last measuring pulse, using a difference between the final value ze and the initial value za as said clock pulse St, and for storing the final value ze as a new initial value za if the measuring pulse sum Si is greater than 1 and less than a maximum value Simax. - View Dependent Claims (8, 9, 10, 11)
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Specification