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SENSING DEVICE

IP.com Disclosure Number: IPCOM000205610D
Publication Date: 2011-Mar-31
Document File: 7 page(s) / 79K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present sensing device comprises a sensor (1) for providing sensor data representative of a quantity to be measured. Together with the sensor (1) a radio frequency interface (2) for transmitting the sensor data is arranged in a casing (3). The casing (3) comprises an opening (33) for exposing a sensitive element (11) of the sensor (1) to an environment of the casing (3). A seal (4) is provided for sealing the opening (33) against an interior (3) of the casing (3). The sensing device can be used as autonomous humidity detector for detecting humidity e.g. in cars under test.

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SENSING DEVICE

Abstract

The present sensing device comprises a sensor (1) for providing sensor data representative of a quantity to be measured. Together with the sensor (1) a radio frequency interface (2) for transmitting the sensor data is arranged in a casing (3). The casing (3) comprises an opening
(33) for exposing a sensitive element (11) of the sensor (1) to an environment of the casing
(3). A seal (4) is provided for sealing the opening (33) against an interior (3) of the casing (3). The sensing device can be used as autonomous humidity detector for detecting humidity e.g. in cars under test.

Technical Field

The present idea refers to a sensing device and to a method for manufacturing a sensing device.

Background Art

Subject to the application and the quantity to be measured sensors may need to be arranged at locations that may be difficult to access. Installing a cabling for connecting such sensors may be cumbersome and may result in a considerable technical effort and/or investment.

Disclosure of the Invention

The problem to be solved by the present invention is therefore to provide a sensing device with an exposed sensitive element which sensing device may be easily installed in environments which are difficult to access.

According to a first aspect of the present invention, a sensing device is provided with a sensor for providing sensor data representative of a quantity to be measured, and a radio frequency interface for transmitting the sensor data. Such sensing device provides a casing for the sensor and the radio frequency interface, the casing comprising an opening for exposing a sensitive element of the sensor to an environment of the casing. A seal is arranged for sealing the opening against an interior of the casing.

The sensing device is autonomous in that it does not need any cabling and is protected from the environment such that it can be installed in an exposed manner in even hardly accessible environments. Especially, the sensing device may be implemented such that it is also autonomous from a local energy source such as batteries: When the radio frequency interface is implemented in transponder technology, an external reader may initiate a wireless transfer of energy for operating the sensor and the radio frequency interface. In this sense, not only data communication is provided wirelessly between the sensing device and the reader but also the energy transfer from the reader to the device. The sensing device may be interpreted as a tag to be attached to its destination which tag provides sensor data representative of the quantity of the desired measure when being energized. Still, the sensor is protected by the casing including an appropriate seal between the interior and the opening in the casing. As such, the sensor device is easily mountable, requires only little space, and may be used in test applications where measures may need to be taken at multiple locations. The tag may also be mounted permanen...