US 12,698,998 B2Granted

Level meter having a radio wave transmission unit and a radio wave reception unit

AssigneeKeyence Corporation

InventorsDaishiro Ishikawa, Takahiro Ishii

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Abstract

Provided is a level meter having a high degree of freedom in an installation place. The level meter includes a sensor unit and a controller that communicates with the sensor unit and supplies power. The sensor unit includes a signal generation unit that generates a transmission signal, a transmission unit that transmits a radio wave according to the generated transmission signal, a reception unit that receives the radio wave reflected by the object and generates a reception signal according to the received radio wave, and a sensor processing unit that measures a level of the object based on at least the reception signal. The controller includes a display unit that performs display according to the measured level and an operation unit for setting a parameter related to measurement of the level.

Claims20

Dependent claims

A level meter for measuring a level of an object, the level meter comprising:

a sensor unit;
and
a controller connected to the sensor unit via a communication cable, configured to communicate with the sensor unit, and supply power to the sensor unit,
wherein
the sensor unit includes:
a signal generation unit configured to generate a transmission signal;
a transmission unit transmitting a radio wave according to a transmission signal generated by the signal generation unit;
a first housing containing the transmission unit;
an attachment portion formed in the first housing and configured to be attached toward an object;
a measurement window provided in the first housing and configured to transmit a radio wave transmitted by the transmission unit;
a reception unit receiving a radio wave reflected by the object through the measurement window and generating a reception signal corresponding to the received radio wave;
and
a sensor processing unit configured to measure the level of the object based on at least the reception signal generated by the reception unit, and
the controller includes:
a power supply supplying power to the sensor unit via the communication cable;
a second housing containing the power supply;
a display unit disposed on the second housing, and configured to display according to the level measured by the sensor processing unit;
and
an operation unit disposed on the second housing, and configured to set a parameter related to measurement of the level.

16 more elements

A level meter for measuring a level of an object, the level meter comprising:

a signal generation unit configured to generate a transmission signal;
a transmission unit transmitting a radio wave according to a transmission signal generated by the signal generation unit;
a first housing containing the transmission unit;
an attachment portion formed in the first housing and configured to be attached toward an object;
a measurement window provided in the first housing and configured to transmit a radio wave transmitted by the transmission unit;
a dielectric lens disposed in the measurement window, and configured to refract a radio wave transmitted by the transmission unit such that the radio wave travels along a measurement axis;
a sensor board contained in the first housing, the sensor board intersecting with the measurement axis, wherein the transmission unit and the reception unit are mounted on the sensor board;
a communication cable penetrating the first housing and electrically connected to the sensor board;
a reception unit receiving a radio wave reflected by the object through the measurement window and generating a reception signal corresponding to the received radio wave;
and
a sensor processing unit configured to measure a level of the object based on at least a reception signal generated by the reception unit.

8 more elements

Dependencies are inferred from the claim text.