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US 6,438,239 B1Granted
Process and arrangement of monitoring the effectiveness of a spray stream
OwnerJörg Kücheninventor
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Abstract
A process of monitoring the function of a spray stream, includes the steps of determining a first signal commensurate with noise in proximity of the spray stream when exiting a spray gun, determining a second signal commensurate with noise in an environment further distant to the spray stream, separating from the first and second signals a wanted signal, and analyzing the wanted signal for evaluation of the effectiveness of the spray stream.
Claims7
A process of monitoring the effectiveness of a spray stream;
- comprising the steps of:
- determining a first acoustical signal commensurate with noise generated in proximity of a spray stream discharged from a spray device;
- determining a second acoustical signal commensurate with noise detected in an environment at a distance to the spray stream;
- digitizing the so determined acoustical signals by transmitting each of the acoustical signals separately to an analog-to-digital converter;
- feeding the so digitized signals to a compensation circuit;
- separating from the first and second digitized signals a wanted signal;
- said separating step including the step of forming the wanted signal by means of the compensation circuit;
- and
- analyzing the wanted signal for evaluation of the functioning of the spray stream.
6 more elements
Arrangement for monitoring the effectiveness of a spray stream, comprising:
- a first microphone forming a first acoustical signal commensurate with noise generated in proximity of a spray stream being discharged from a spray device;
- a second microphone forming a second acoustical signal commensurate with interfering noise generated in an environment further distant to the discharged spray stream;
- analog-to-digital converter means operatively connected to the first and second microphones for changing the detected noises into respective first and second digital output signals;
- and
- first signal processing means for receiving the first and second digital output signals for computing a wanted signal which is freed from any interfering signal, wherein the signal processing means includes compensation means for computing said wanted signal;
- and
- second signal processing means for comparing the wanted signal with a reference signal such that a degree of similarity with the reference signal can be indicated, and wherein the signal processing means includes means for executing a cross correlation function.
4 more elements
Dependencies are inferred from the claim text.