摘要:
An inertial force sensor includes a weight, a first fixing portion linked to the weight, a second fixing portion linked to the weight via the first fixing portion, a first electrode on a first surface of the weight, a second electrode facing the first electrode, and first and second elastic portions elastically deforming so as to displace the weight. The first elastic portion displaces the weight along an X-axis but not along any of a Y-axis and a Z-axis. The second elastic portion displaces the first fixing portion along the Y-axis but not along any of the X-axis and the Z-axis. This inertial force sensor detects an acceleration at high sensitivity.
摘要:
An optical reflection element has a frame-shaped supporting body, a first oscillator and a second oscillator each having a meander shape, and a mirror portion. A line segment connecting a joining position between the mirror portion and the first oscillator to a joining position between the supporting body and the first oscillator, and a line segment connecting a joining position of the mirror portion and the second oscillator to a joining position of the supporting body and the second oscillator cross a mirror portion central axis. An outer circumference of at least any one of turn portions of the first oscillator and the second oscillator is deviated from a first end portion axis that is parallel to the mirror portion central axis and extends along a first side of the mirror portion. Alternatively, an outer circumference of at least any one of the turn portions of the first oscillator and the second oscillator is deviated from a second end portion axis T2 that is parallel to the mirror portion central axis and extends along a second side parallel to the first side of the mirror portion. At least any one of these two conditions is satisfied.
摘要:
Disclosed is an angular velocity sensor for achieving downsizing of a variety of electronic devices. For this purpose, the angular velocity sensor has a subtracter for outputting a first differential signal based on two sensor signals output from a first sensing electrode unit and a second sensing electrode unit, an adder for outputting a first additional signal, another subtracter for outputting a second differential signal based on two sensor signals output from a third sensing electrode unit and a fourth sensing electrode unit, and another adder for outputting a second additional signal. The sensor then detects an angular velocity from an additional signal obtained based on the first differential signal and the second differential signal and a differential signal obtained based on the first additional signal and the second additional signal.
摘要:
An optical reflection device includes a mirror having a reflection surface configured to reflect light, a first support beam connected to the mirror, a tuning fork vibrator connected to the first support beam, a second support beam connected to the tuning fork vibrator, and a supporter connected to the second support beam. The first support beam has a first end connected to the mirror and a second end located on an opposite side to the first end, and extends along a center axis. The tuning fork vibrator includes a joining portion connected to the second end of the first support beam, a first arm extending from the first joining portion while separated from the first center axis, and a second arm extending from the first joining portion symmetrically to the first arm about the first center axis. The second support beam has a third end connected to the joining portion of the tuning fork vibrator and a fourth end located on an opposite side to the third end, and extends along the first center axis.
摘要:
Disclosed is an angular velocity sensor for achieving downsizing of a variety of electronic devices. For this purpose, the angular velocity sensor has a subtracter for outputting a first differential signal based on two sensor signals output from a first sensing electrode unit and a second sensing electrode unit, an adder for outputting a first additional signal, another subtracter for outputting a second differential signal based on two sensor signals output from a third sensing electrode unit and a fourth sensing electrode unit, and another adder for outputting a second additional signal. The sensor then detects an angular velocity from an additional signal obtained based on the first differential signal and the second differential signal and a differential signal obtained based on the first additional signal and the second additional signal.
摘要:
An angular velocity sensor detects an angular velocity of an object. The angular velocity sensor includes a detecting element, and a driving unit. The detecting element includes a supporting part, a first arm extending from the supporting part and being adapted to be fixed to the object, a second arm extending from the supporting part, and a first weight connected with the second arm. The second arm has substantially a U-shape and includes a first extending part extending from the supporting part, a first facing part facing the first extending part and extending in parallel with the first extending part, and a first joint part joining the first extending part to the first facing part. The first weight is connected with the facing part of the second arm. The driving unit includes first to fourth drivers. The first driver is provided at the first extending part and extends and contracts the first extending part. The second driver is positioned at the first extending part at a more outer circumference of the U-shape of the second arm than the first driver. The second driver extends and contracts the first extending part. The third driver is positioned at the first facing part, and extends and contracts the first facing part. The fourth driver is positioned at the first facing part at a more inner circumference of the U-shape of the second arm than the third driver, and extends and contracts the first facing part. This angular velocity sensor has a small size along a rotation axis about which an angular velocity to be detected.
摘要:
An optical reflecting element includes a mirror, and a pair of high-frequency vibrators and a pair of low-frequency vibrators for vibrating the mirror. The high-frequency vibrators include a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer, and a drive electrode and a first monitor electrode as the top electrode layer. One end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, and a second monitor electrode as the top electrode layer. The other end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, a first monitor electrode, and an insulator layer as a dead zone for preventing a piezoelectric effect due to the piezoelectric layer from reaching the first monitor electrode. The first monitor electrode provided on the low-frequency vibrator is connected from the top of the vibrator to an extraction electrode.
摘要:
An optical reflection device includes a flexible substrate, an elastic portion connected with an end of the flexible substrate, an optical reflector coupled with the flexible substrate via the elastic portion, a first electrode layer provided on the flexible substrate, and a piezoelectric layer provided on the first electrode layer. The optical reflection device may have a small size.
摘要:
An optical reflection device includes a mirror adapted to reflect light thereon, a first meander vibration beam supporting the mirror rotatably about the first rotation axis, a movable frame connected to the first meander vibration beam, a second meander vibration beam supporting the movable frame rotatably about a second rotation axis, and a supporter connected to the second meander vibration beam. The first meander vibration beam meanderingly extends along a first rotation axis, and has a first end and a second end opposite to the first end. The movable frame is connected to the second end of the first meander vibration beam. The second meander vibration beam extends meanderingly along the second rotation axis perpendicular to the first rotation axis, and has a third end and a fourth end opposite to the third end. The supporter is connected to the fourth end of the second meander vibration beam. The mirror is coupled to the movable frame only via the first meander vibration beam. This optical reflection device has a large angle by which the mirror rotates about the first rotation axis.
摘要:
A meandering oscillator includes a plurality of oscillating plates bent and coupled in predetermined directions and piezoelectric actuators each including a lower electrode, a piezoelectric body, and an upper electrode stacked on the oscillating plate in this order, and wherein the piezoelectric actuators are alternately arranged on the oscillating plates. Thus, even when an element is made smaller, electrodes can be easily arranged. As a result, the productivity can be improved.