Abstract:
A soil sensor includes a first signal line transmitting a high-frequency electromagnetic wave, and a porous body having a water permeability and a water retention property. The soil sensor further includes a second signal line transmitting a low-frequency electromagnetic wave and facing soil through the porous body, and a ground line arranged on an inside of the first signal line. The second signal line is arranged on an inside of the first signal line and the ground line. Thus, the first signal line and the second signal line are prevented from causing an influence to each other by an electric field generated by one of the two lines.
Abstract:
When one direction of plane directions of a substrate is a first direction and a direction of the plane directions of the substrate perpendicular to the first direction is a second direction, a vibrating member is supported at an outer peripheral section via a plurality of beam sections having first beam-configuring members that can displace at least in the first direction and second beam-configuring members that are joined to the first beam-configuring members and that can displace at least in the second direction. In at least a subset of the plurality of beam sections, beam-configuring members on a side of the outer peripheral section among the first beam-configuring members and the second beam-configuring members are integrated with each other.
Abstract:
A vibration angular velocity sensor includes a fixed portion, a movable portion, a beam portion, and an anti-vibration spring structure. The movable portion has driving-detection weights. The beam portion has detection beams, support members, and driving beams, and has a frame structure formed of the driving beams, the support members, and the driving-detection weights. The anti-vibration spring structure is disposed between the detection beams and the fixed portion and is deformable along a first axis and a second axis. The vibration angular velocity sensor causes the driving-detection weights disposed on both sides of the fixed portion to undergo driving vibrations in directions opposite to each other along the first axis about the fixed portion and detects an angular velocity based on a fact that the driving-detection weights vibrate also along the second axis upon application of the angular velocity.
Abstract:
An oscillation device includes a vibrator made of a quartz substrate, a vibration substrate coupled to the vibrator and including a peripheral portion surrounding a periphery of the vibrator, a support substrate jointed to the vibration substrate at the peripheral portion of the vibration substrate, a cap layer disposed on an opposite side of the vibration substrate from the support substrate and jointed to the vibration substrate at the peripheral portion of the vibration substrate via a joint. At least one pad electrically connected to the vibration substrate is formed on the cap layer. At least one conductor pattern opposed to the pad is formed on a vibration substrate side surface of the cap layer and is electrically connected to the pad.
Abstract:
In a physical quantity sensor, a contact part that is directly and electrically connected to an external circuit is formed in a support substrate, and the support substrate is maintained at a predetermined potential through the contact part. With this configuration, the support substrate is maintained at the predetermined potential without disposing an electrode in the interior of the semiconductor layer. For that reason, a processing precision can be restrained from being reduced in forming the movable electrode, and hence a detection precision can be restrained from being reduced.