Device and system for monitoring internal temperature of inaccessible or moving parts
First Claim
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1. A device for measuring temperature of the inside of an inaccessible movable mechanical part, comprising:
- a temperature-sensitive element from which a measurement of temperature can be obtained and having a SAW chip with temperature-dependent transfer function, the SAW chip having a transducer designed to be connected to an antenna mounted on an outside of said mechanical part,an encapsulation for said temperature-sensitive element, the encapsulation being designed to be arranged separately and kept in position at an inner end of a mounting hole in said moving mechanical part and thus exposed to temperature inside the mechanical part,a bolt for closing the mounting hole and a material placed between said bolt and the encapsulation for holding the encapsulation securely in position after mounting, anda transmission line for connecting the antenna to the temperature-sensitive element,whereby the device is adapted for measuring temperature inside the inaccessible mechanical part while the mechanical part is in motion.
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Abstract
A device and a system for measuring temperature in an inaccessible and/or movable mechanical part. The device comprises a temperature-sensitive clement which can be installed inside the movable part and which is designed to emit a signal containing information on the temperature of said clement, in such a way that this signal can be received by a control unit. The temperature-sensitive clement is a SAW chip which is arranged at the lower end of a hole in the mechanical part whose temperature is to be measured and it is connected to a first antenna provided outside said hole in said mechanical part.
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Citations
10 Claims
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1. A device for measuring temperature of the inside of an inaccessible movable mechanical part, comprising:
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a temperature-sensitive element from which a measurement of temperature can be obtained and having a SAW chip with temperature-dependent transfer function, the SAW chip having a transducer designed to be connected to an antenna mounted on an outside of said mechanical part, an encapsulation for said temperature-sensitive element, the encapsulation being designed to be arranged separately and kept in position at an inner end of a mounting hole in said moving mechanical part and thus exposed to temperature inside the mechanical part, a bolt for closing the mounting hole and a material placed between said bolt and the encapsulation for holding the encapsulation securely in position after mounting, and a transmission line for connecting the antenna to the temperature-sensitive element, whereby the device is adapted for measuring temperature inside the inaccessible mechanical part while the mechanical part is in motion. - View Dependent Claims (2, 3)
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4. A system for monitoring the temperature inside inaccessible movable mechanical parts, comprising:
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a sensor for each of the mechanical parts and including a temperature-sensitive element having a SAW chip with a temperature-dependent transfer function, the SAW chip having a transducer connected to a first antenna mounted on the outside of the respective mechanical part; an encapsulation for the temperature-sensitive element, the encapsulation being placed and kept in position in a mounting hole in the respective mechanical part to measure temperature inside the mechanical part, the temperature-sensitive element being connected to the first antenna via a transmission line; and a second antenna for the sensor of each mechanical part and arranged to transmit signals to and receive signals from the respective sensor via said first antenna while the mechanical part is in motion, said second antenna being connected via a signal cable with a control unit comprising a multiplexer; wherein the control unit includes means for transmitting a polling signal to and for receiving a modified polling signal from the sensor of each mechanical part via an associated signal cable and associated second antenna while the respective mechanical part is in motion, the control unit further including means for processing the received modified polling signal, and, on the basis of the characteristics of the modified polling signal, for generating a data signal representative for the temperature of the sensor of the respective mechanical part. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification