Acceleration sensor
First Claim
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1. An apparatus comprising a group of at least two acceleration sensors arranged on one carrier;
- wherein each acceleration sensor comprises a first body portion, a second body portion, and a breakable interconnecting element, constructed to break at a determine rupture point, said interconnecting element making the first body portion integral with the second body portion and a detector arranged for giving an indication when the breakable interconnecting element of the sensor is ruptured;
and wherein at least two of the sensors are oriented differently from one another, such that a first sensor is more sensitive than a second sensor to a force in a first direction, and the second sensor is more sensitive than the first sensor to a force in a second direction different to the first direction.
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Abstract
A low-cost breakable inertial threshold sensor using mainly micro-machining silicon technology constructed on a silicon-wafer or on some other brittle material according to the MEMS process. The sensor comprises a first body portion, a second body portion, and detecting means for giving an indication if the second body portion has damaged the detecting means. The status of the sensor can be read in various ways. In one embodiment the status is remotely readable.
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Citations
29 Claims
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1. An apparatus comprising a group of at least two acceleration sensors arranged on one carrier;
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wherein each acceleration sensor comprises a first body portion, a second body portion, and a breakable interconnecting element, constructed to break at a determine rupture point, said interconnecting element making the first body portion integral with the second body portion and a detector arranged for giving an indication when the breakable interconnecting element of the sensor is ruptured; and wherein at least two of the sensors are oriented differently from one another, such that a first sensor is more sensitive than a second sensor to a force in a first direction, and the second sensor is more sensitive than the first sensor to a force in a second direction different to the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A handheld terminal, comprising
an acceleration sensor arrangement comprising a group of at least two acceleration sensors; -
wherein each acceleration sensor comprises a first body portion, a second body portion, an interconnecting element making the first body integral with the second body, and a detector means arranged for giving an indication when a breakable component of the sensor is ruptured and further giving an indication to a user of the handheld terminal of rupture of the breakable component; and wherein at least two of the sensors are oriented differently from one another, such that a first sensor is more sensitive than a second sensor to a force in a first direction, and the second sensor is more sensitive than the first sensor to a force in a second direction different to the first direction. - View Dependent Claims (24)
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25. A method comprising:
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giving an indication when a breakable component of at least one acceleration sensor of an acceleration arrangement is ruptured; wherein the acceleration sensor arrangement comprises a group of at least two acceleration sensors, each acceleration sensor comprising a first body portion, a second body portion, and a breakable interconnecting element, constructed to break at a predetermined rupture point, said interconnecting element making the first body portion integral with the second body portion and a detector arrangement for giving the indication when the breakable interconnecting element of the sensor is ruptured; and wherein at least two of the sensors are oriented differently from one another, such that a first sensor is more sensitive than a second sensor to a force in a first direction, and the second sensor is more sensitive than the first sensor to a force in a second direction different to the first direction. - View Dependent Claims (26, 27, 28, 29)
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Specification