摘要:
A piezoelectric actuator comprises: a piezoelectric ceramic vibrator (2) which vibrates when a voltage is applied to electrodes; a first holder (3) which is joined to a panel (502) and supports one end portion of the piezoelectric ceramic vibrator (2); and a second holder (4) which is joined to the panel (502) and supports the other end portion of the piezoelectric ceramic vibrator (2). The vibrations generated in the piezoelectric ceramic vibrator (2) are transmitted to the panel (502) via the one end portion of the piezoelectric ceramic vibrator (2) and the first holder (3), and the relative movements of the other end portion of the piezoelectric ceramic vibrator (2) in the lengthwise and crosswise directions with respect to the panel (502) are constrained by the second holder (4).
摘要:
A portable terminal device comprises a case 110, oscillator 171, passive element 172, voltage measurement circuit 173 and controller 180. The case 110 comprises an electrode having a surface exposed to the outside, on at least a part of the case 110. The oscillator 171 outputs an A.C. voltage signal. One end of the passive element 172 is connected to the oscillator 171, and the other end is connected to the electrode. The voltage measurement circuit 173 is connected to both ends of the passive element 172, and detects the voltage applied to the passive element 172. The control unit 180 acquires the biological information of a living body based on the voltage detected by the voltage measurement circuit 173 in a state in which an A.C. output from the oscillator 171 and the electrode exposed to the outside is in contact with the living body.
摘要:
An organism information measuring instrument of the present invention includes: a sensor that measures organism information; a normalization circuit that normalizes the organism information by converting a value of the organism information based on preset normalization information; and a reliability information generation circuit that detects a change amount greater than or equal to a predetermined value in a predetermined time period, with respect to the organism information or the normalized organism information, and generates reliability information indicating lower reliability as the change amount is greater.
摘要:
The present invention aims to reduce a size and improve quality of an infrared sensor. An infrared sensor (203) according to the present invention includes a substrate (202) and an infrared detection element (201). A principal surface of the substrate (202) includes a convex shape. The infrared detection element (201) is formed over the principal surface including the convex shape of the substrate (202). Further, as for the infrared detection element (201), an entire light-receiving surface includes a planar shape. Then, it can be the small-sized infrared sensor (203) with improved quality.
摘要:
Provided is an infrared ray sensor that can conduct a plurality of different types of detection such as temperature detection and gas detection in a simple structure and that is small size and low cost. The infrared ray sensor (1) includes, on one base (10), a first infrared ray detection unit (31) including at least one infrared ray detection element (20) including an infrared ray detection material (22) with physical properties changing depending on properties of incident infrared rays and receives and detects ambient infrared rays, and a second infrared ray detection unit (32) including at least one infrared ray detection element (20) having an identical element structure to the infrared ray detection element of the first infrared ray detection unit (31), is irradiated with infrared rays X for measurement having specific physical properties, and detects a change in the physical properties of the infrared rays X for measurement.
摘要:
Provided is an infrared ray sensor that can conduct a plurality of different types of detection such as temperature detection and gas detection in a simple structure and that is small size and low cost. The infrared ray sensor (1) includes, on one base (10), a first infrared ray detection unit (31) including at least one infrared ray detection element (20) including an infrared ray detection material (22) with physical properties changing depending on properties of incident infrared rays and receives and detects ambient infrared rays, and a second infrared ray detection unit (32) including at least one infrared ray detection element (20) having an identical element structure to the infrared ray detection element of the first infrared ray detection unit (31), is irradiated with infrared rays X for measurement having specific physical properties, and detects a change in the physical properties of the infrared rays X for measurement.
摘要:
The present invention aims to reduce a size and improve quality of an infrared sensor. An infrared sensor (203) according to the present invention includes a substrate (202) and an infrared detection element (201). A principal surface of the substrate (202) includes a convex shape. The infrared detection element (201) is formed over the principal surface including the convex shape of the substrate (202). Further, as for the infrared detection element (201), an entire light-receiving surface includes a planar shape. Then, it can be the small-sized infrared sensor (203) with improved quality.
摘要:
Provided is a small-size thin piezoelectric actuator which can be mounted on a mobile electronic device and operate with a low power consumption also provided is an electronic device which uses the piezoelectric actuator to provide a function to give a contact feeling of a three dimensional movement to a users hand palm. The piezoelectric actuator (1) includes: a piezoelectric ceramic oscillator having a piezoelectric ceramic thin plate (5) bonded to at least one surface of a shim member (6); at least one holder (7) for holding the shim member (6); and a sheet-shaped elastic body (2). Vibration generated by the piezoelectric ceramic oscillator is transmitted via the holder (7) and the sheet-shaped elastic body (2) to a case (3) of the electronic device.
摘要:
A piezoelectric actuator 60 includes a piezoelectric element 10 expanding and contracting according to a state of an electric field, a pedestal 20, a vibration film 30, and a support member. In the vibration mode of the divided vibration occurring in the piezoelectric actuator in a high frequency band, one or more reinforcement members 50 are selectively disposed on an upper surface or a lower surface of the piezoelectric element 10, in a region where a node of divided vibration occurs. With such configurations, the vibration mode can be changed in the piezoelectric element 10. Therefore, in the frequency sound pressure level characteristics, the divided vibration causing hills or valleys (peaks or dips) can be effectively suppressed, thus enabling the achievement of flatness of frequency sound pressure level characteristics and of reproduction of excellent sound.
摘要:
A viscoelastic body is interposed between a vibrating membrane vibrating in association with a piezoelectric vibrator composed of a piezoelectric element and a base and a support member supporting the vibrating membrane. The viscoelastic body attenuates vibration transmitted from the support member to the vibrating membrane and converts vibration of the vibrating membrane in the surface direction parallel to its main surfaces to vibration of the vibrating membrane in the direction nearly perpendicular to the surface direction. The vibrating membrane is annular with an opening at the center, and the base is joined to the vibrating membrane coaxially with opening.