Device for detecting mass particles and method for control
First Claim
1. A device for detecting mass particles carried in air streams, in particular seeds to be distributed in a seed drill, comprising a pipe through which the air stream containing the mass particles is guided, with a sensor element arranged on the pipe, the sensor element comprisinga piezo-element,an impact plate arranged on the side of the piezoelectric element facing the inside of the pipea damping body arranged on the side of the piezoelectric element facing away from the inside of the pipe, anda rigid base body or securing element disposed on the side of the piezoelectric element facing away from the inside of the pipe, whereinbetween the damping body (10) and the rigid base body or securing element (12) a contact disk (11) is arranged having a first connecting element (17) and a second connecting element (19) at a radial distance to the first connecting element, and whereinthe damping body (10) is designed as a damping disc, having electrical connecting elements (14, 16) spaced-apart from one another in the radial direction, wherein, on the one hand, a first connecting element (14) electrically connects only the first connecting surface (17) of the contact disk (11) with a first connecting element (21) of the piezo element (9), and on the other hand, a second connecting element (16) of the damping plate electrically connects only the second connecting element (19) of the contact disk (11) to the second connecting element (22) of the piezo element (9).
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Accused Products
Abstract
A device for detecting mass particles in air flows guided in a pipe, in particular of seeds to be distributed in a seed drill. A sensor element is disposed on the pipe. The sensor element is a piezoelectric element. An impact surface is disposed on the side of the piezoelectric element facing the interior of the pipe. A damping body is arranged on the side of the piezoelectric element facing away from the interior of the pipe. A rigid base body is disposed on the side of the piezoelectric element facing away from the interior of the pipe.
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Citations
8 Claims
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1. A device for detecting mass particles carried in air streams, in particular seeds to be distributed in a seed drill, comprising a pipe through which the air stream containing the mass particles is guided, with a sensor element arranged on the pipe, the sensor element comprising
a piezo-element, an impact plate arranged on the side of the piezoelectric element facing the inside of the pipe a damping body arranged on the side of the piezoelectric element facing away from the inside of the pipe, and a rigid base body or securing element disposed on the side of the piezoelectric element facing away from the inside of the pipe, wherein between the damping body (10) and the rigid base body or securing element (12) a contact disk (11) is arranged having a first connecting element (17) and a second connecting element (19) at a radial distance to the first connecting element, and wherein the damping body (10) is designed as a damping disc, having electrical connecting elements (14, 16) spaced-apart from one another in the radial direction, wherein, on the one hand, a first connecting element (14) electrically connects only the first connecting surface (17) of the contact disk (11) with a first connecting element (21) of the piezo element (9), and on the other hand, a second connecting element (16) of the damping plate electrically connects only the second connecting element (19) of the contact disk (11) to the second connecting element (22) of the piezo element (9).
Specification