| 发明名称 |
CONTACTLESS DISTANCE SENSOR AND METHOD FOR CARRYING OUT A CONTACTLESS DISTANCE MEASUREMENT |
| 摘要 |
The present invention relates to a distance sensor suitable for calculating a processed distance of a target object without contact, including: a contactless measuring circuit suitable for emitting an output signal proportional to the distance of said target object for a plurality of time intervals, so as to obtain a plurality of measurements of the distance of said target object without contact; a first processor circuit suitable for processing said output signals coming from said measuring circuit, so as to calculate a first average distance from said target object based on the average of N distance measurements in output coming from said measuring circuit, said N measurements being consecutive in time and including the last distance measurement emitted by said measuring circuit; a second processor circuit suitable for processing said output signals coming from said measuring circuit, so as to calculate a second average distance from said target object based on the average of M distance measurements in output coming from said measuring circuit, said M measurements being a subset of said N measurements with M<N, consecutive in time and including the last distance measurement emitted by said measuring circuit; a first comparator circuit suitable for calculating a first difference between a value function of said first average distance and a value function of said second average distance; and a third processor circuit suitable for comparing said first difference with a first threshold and for emitting in output a processed distance value, said processed distance value being equal to a value function of said first average distance if said first difference is less than or equal to said first threshold, or being equal to a value function of said last distance measurement emitted by said measuring circuit otherwise. Furthermore, the invention relates to an operating method of said sensor. |
| 申请公布号 |
US2015153169(A1) |
申请公布日期 |
2015.06.04 |
| 申请号 |
US201414553650 |
申请日期 |
2014.11.25 |
| 申请人 |
Datalogic IP Tech, S.r.l. |
发明人 |
Cani Salvatore Valerio;Lorenzoni Enrico |
| 分类号 |
G01B21/16 |
主分类号 |
G01B21/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A distance sensor to calculate distances (d) of a target object without contact, the distance sensor comprising:
a contactless measuring circuit that emits an output signal proportional to a distance of said target object at a plurality of time intervals, to obtain a plurality of measurements of the distance of said target object without contact; a first processor circuit communicatively coupled to receive and process said output signals from said measuring circuit, to calculate a first average distance from said target object based on an average of a number N of distance measurements in output signals from said measuring circuit, said number of N distance measurements being consecutive in time and including a last distance measurement emitted by said measuring circuit in a period of time; a second processor circuit communicatively coupled to receive and process said output signals from said measuring circuit, to calculate a second average distance from said target object based on an average of a number M of distance measurements in output from said measuring circuit, said number M of distance measurements being a subset with the number M<the number N of said number N of distance measurements, consecutive in time and including the last distance measurement emitted by said measuring circuit in the period of time; a first comparator circuit communicatively coupled to receive and calculate a first difference between a function value of said first average distance and a function value of said second average distance; and a third processor circuit communicatively coupled to receive and compare said first difference with a first threshold and to provide as an output a processed distance value, said processed distance value being equal to a value function of said first average distance if said first difference is less than or equal to said first threshold, or otherwise equal to a value function of said last distance measurement emitted by said measuring circuit. |
| 地址 |
Bologna IT |
