An impact indicator includes a housing configured to enable movement of a mass member from a first position to a second position in response to receipt by the housing of an acceleration event. The indicator also includes switch circuitry having a compressible switch element positionable between spaced apart contacts where the switch element is configured to be in spaced apart relationship to the mass member. A passive radio-frequency identification (RFID) module is coupled to the switch circuitry and, responsive to movement of the mass member from the first position to the second position, the mass member causes a positional change of the switch element relative to the first and second contacts, and the positional change causes a state change in the switch circuitry. The RFID module outputs a value based on the state of the switch circuitry when energized.

An impact indicator includes a housing configured to enable movement of a mass member from a first position to a second position in response to receipt by the housing of an acceleration event. The indicator also includes switch circuitry having a compressible switch element positionable between spaced apart contacts where the switch element is configured to be in spaced apart relationship to the mass member. A passive radio-frequency identification (RFID) module is coupled to the switch circuitry and, responsive to movement of the mass member from the first position to the second position, the mass member causes a positional change of the switch element relative to the first and second contacts, and the positional change causes a state change in the switch circuitry. The RFID module outputs a value based on the state of the switch circuitry when energized.

An inertial sensor includes: a substrate; a movable body configured to be displaced with respect to the substrate; and an attenuator configured to attenuate a displacement of the movable body with respect to the substrate. The attenuator includes a comb-shaped first structure including a plurality of movable comb fingers whose base ends are coupled to the movable body, and a comb-shaped second structure including a plurality of fixed comb fingers whose base ends are coupled to the substrate, the plurality of fixed comb fingers intersecting with the plurality of movable comb fingers. A width of the base end of each of the movable comb fingers and the fixed comb fingers is larger than a width of a tip end thereof.

An inertial sensor includes: a substrate; a movable body configured to be displaced with respect to the substrate; and an attenuator configured to attenuate a displacement of the movable body with respect to the substrate. The attenuator includes a comb-shaped first structure including a plurality of movable comb fingers whose base ends are coupled to the movable body, and a comb-shaped second structure including a plurality of fixed comb fingers whose base ends are coupled to the substrate, the plurality of fixed comb fingers intersecting with the plurality of movable comb fingers. A width of the base end of each of the movable comb fingers and the fixed comb fingers is larger than a width of a tip end thereof.

A physical quantity sensor includes first and second fixed electrode sections on a substrate, a first movable electrode section having a movable electrode opposite a fixed electrode of the first fixed electrode section, a second movable electrode section having a movable electrode opposite a fixed electrode of the second fixed electrode section, first and second fixed sections fixed to the substrate, a first support beam having one end coupled to the first fixed section, a first coupling section coupling the other end of the first support beam and the first movable electrode section, a second support beam having one end coupled to the second fixed section, and a second coupling section coupling the other end of the second support beam and the second movable electrode section. The first movable electrode section, the second fixed section, the first fixed section, and the second movable electrode section are disposed side by side.

A physical quantity sensor includes first and second fixed electrode sections on a substrate, a first movable electrode section having a movable electrode opposite a fixed electrode of the first fixed electrode section, a second movable electrode section having a movable electrode opposite a fixed electrode of the second fixed electrode section, first and second fixed sections fixed to the substrate, a first support beam having one end coupled to the first fixed section, a first coupling section coupling the other end of the first support beam and the first movable electrode section, a second support beam having one end coupled to the second fixed section, and a second coupling section coupling the other end of the second support beam and the second movable electrode section. The first movable electrode section, the second fixed section, the first fixed section, and the second movable electrode section are disposed side by side.

An impact indicator includes a housing configured to enable movement of a mass member from a first position to a second position in response to receipt by the housing of an acceleration event. The indicator also includes switch circuitry having a compressible switch element positionable between spaced apart contacts where the switch element is configured to be in spaced apart relationship to the mass member. A passive radio-frequency identification (RFID) module is coupled to the switch circuitry and, responsive to movement of the mass member from the first position to the second position, the mass member causes a positional change of the switch element relative to the first and second contacts, and the positional change causes a state change in the switch circuitry. The RFID module outputs a value based on the state of the switch circuitry when energized.

An impact indicator includes a housing configured to enable movement of a mass member from a first position to a second position in response to receipt by the housing of an acceleration event. The indicator also includes switch circuitry having a compressible switch element positionable between spaced apart contacts where the switch element is configured to be in spaced apart relationship to the mass member. A passive radio-frequency identification (RFID) module is coupled to the switch circuitry and, responsive to movement of the mass member from the first position to the second position, the mass member causes a positional change of the switch element relative to the first and second contacts, and the positional change causes a state change in the switch circuitry. The RFID module outputs a value based on the state of the switch circuitry when energized.

A passive micromechanical counter for counting and storing a number of mechanical pulses includes at least one memory cell, the memory cell having a cell input, a latching mechanism and an electromechanical coding unit, the cell input being designed to mechanically transmit the mechanical pulse to the latching mechanism, and the latching mechanism being designed to store the number of mechanical pulses transmitted by means of its discrete latching position. It is provided that an electrical digital signal can be generated by applying an electrical voltage to the electromechanical coding unit, the electrical digital signal representing the discrete latching position of the latching mechanism.

A compact fall detection sensor includes a case. A magnet is housed in the case. A reed switch with a pair of reeds are integrally positioned around the central axis of the case at the bottom of the case. In an upright state, the magnet is gravitationally positioned in the longitudinal direction of the reed switch around the central axis of the curved surface of the case, each magnetic pole magnetizing the corresponding reed of the reed switch, allowing one of the reeds to be magnetized to N pole and the other reed to S pole to turn on the switch. When inclined from the upright state, the magnet slides along the curved surface of the case and deviates from the central axis, to position only one of the magnetic poles of the magnet around the central axis to turn off the reed switch.