摘要:
The present invention is related to an angular velocity sensor, and intends to improve the detection characteristic through a precise measuring of an angular velocity signal. For this objective, the invented angular velocity sensor comprises U-shape first and second piezoelectric elements(4),(5) bonded together sandwitching a detection electrode(6), wherein in at least one of the tuning fork arms(4a),(5a) the first and second piezoelectric elements(4),(5) are polarized in a direction of thickness along which the piezoelectric elements are bonded together. Driving electrodes(7),(12) and (8),(11) provided in diagonal arrangement on the tuning fork arm are supplied with driving signals inverse-phased to each other. In such a structure, the driving signals cancell to each other at the vicinity of detection electrode; as a result, the driving signals never mix with a detection signal to be detected by the detection electrode(6). Thus, the capability of detecting an angular velocity signal is improved.
摘要:
An object of the present invention is to provide an inclination sensor that has a superior rotational performance and long term stability, and is high in detecting accuracy. In order to achieve the above object, the inclination sensor of the present invention comprises a pendulum (10) mounted rotatably relative to a case (1) of a fixing body to be fixed to a mounting body, a magnetic flux generation means (11) mounted on the pendulum (10), reed switches (4a) and (4b) mounted on a part of the case (1) corresponding with a rotational path of the magnetic flux generation means (11), and a flange part (12) having nonmagnetic and electrically conductive properties defining a damping body arranged on the case (1) along the rotational path of the magnetic flux generation means (11).
摘要:
A detector of a rotation angle and torque is disclosed. First gear (1) and second gear (2) are coupled to input shaft (4) and output shaft (6) of a torsion-bar unit respectively. First magnet (20a) magnetized in a radius direction is rigidly mounted to first rotor (10) engaging with first gear (1). Second magnet (20b) magnetized in a radius direction is rigidly mounted to second rotor (16) engaging with second gear (3). Circuit board (15) is placed between first rotor (10) and second rotor (16). Circuit board (15) includes first magnetism detecting element (21a) on its first face confronting the first magnet (20a), and also includes second magnetism detecting element (21b) on its second face confronting the second magnet (20b).
摘要:
The present invention aims at providing an inclination angle sensor that can be mounted on a vehicle such as an automobile, resistant to external disturbances such as vibrations, superior in rotational performance, and small in size. In order to achieve the object, an inclination angle sensor of the present invention includes: a non-magnetic and electrically conductive weight (1); a rotary shaft (2) fixed to the weight (1); a bearing (3) for rotatably supporting the rotary shaft (2); a frame (4) for securing the bearing (3); one or two combinations of reflection type photo-interrupter (6) consisting of a light-receiving element (27) and a light-emitting element (26) for varying signal in response to a movement of the weight (1); a flange part (7) provided to outstretch from an outer perimeter of the weight in parallel to or in a manner to form a predetermined angle with the rotary shaft (2); and a magnet (8) fixed to the frame (4) in a manner produce magnetic flux primarily toward the flange part (7).
摘要:
The rotation angle-detecting device has a main rotator and two detecting rotators that rotate as the main rotator rotates. Each of the two detecting rotators has a magnet and a magnetic detector. As the detecting rotator rotates, a change occurs in magnetic lines of force from the magnet. From the change, the magnetic detector detects rotation of the detecting rotator. According to the rotation detected, the device determines the rotation angle of the main rotator. In addition, a ring-shaped ferromagnetic body is disposed around the magnet or the magnetic detector of the detecting rotator. The structure described above enables magnetic detection without disturbance in each magnetic field of the magnets, and even in a downsized structure, the device can detect the rotation angle with high accuracy
摘要:
A detector of an absolute rotation angle and torque is disclosed. The detector includes a first gear (1) coupled to an input shaft (2) of a torsion-bar unit, a gear A (6) engaging with the first gear (1), and a first detecting section of an absolute rotation angle placed at the center of the gear A (6). The detector also includes a second gear (3) coupled to an output shaft (4) of the torsion-bar unit, a gear B (7) engaging with the second gear (3), and a second detecting section of an absolute angle placed at the center of gear B (7).
摘要:
An angular velocity sensor for accurately detecting an angular velocity signal. The angular velocity sensor employs a tuning fork structure wherein first and second U-shaped piezoelectric members (4) and (5) superposed with each other through a detection electrode (6) are polarized in the same direction as the direction of thickness in which their prongs (4a) and (5a) at least on one sidre is superposed, and driving signals having opposite phases are supplied between driving electrodes (7) and (12) and between (8) and (11) disposed on the diagonal lines of the tuning fork prongs. Therefore, the driving signals are cancelled in the proximity of the detection electrode, and the driving signals do not mix in the signal detected by the detection electrode (6). Accordingly, the performance of the angular velocity signal can be improved.