摘要:
Static and dynamic acceleration as well as static and dynamic angular velocity are detected with a simple structure. An acceleration detecting section (100) includes a weight body (110), a pedestal (130) around the weight body (110), flexible plate-like bridge portions (121-124), and piezoresistive elements (P) embedded in the upper surface of the bridge portions (121-124). An angular velocity detecting section (200) includes a weight body (210), a pedestal (230) around the weight body (210), flexible plate-like bridge portions (221-224), and piezoelectric elements (D, E) fixed to the upper surface of the bridge portions (221-224). The pedestals (130, 230) are fixed to a device chassis (400). When the weight body (110) is displaced by acceleration, the plate-like bridge portions (121-124) are deflected, so that the acceleration is detected based on the change in the electrical resistances of the piezoresistive elements (P). When the weight body (210) is displaced by a Coriolis force based on angular velocity while supplying alternating signals to the piezoelectric elements (E) to oscillate the weight body (210), the plate-like bridge portions (221-224) are deflected, so that the angular velocity is detected based on charge generation in the piezoelectric elements (D).
摘要:
A MEMS acceleration sensor comprising: a frame, a plurality of proofmasses; a plurality of flexures; a plurality of hinges and a plurality of gauges. The frame, proofmasses, flexures, hinges and gauges designed to measure acceleration in a direction perpendicular to the device plane while being generally resistant to motions parallel to the device plane. The measurement of the acceleration is accomplished through the piezoresistive effect of the strain in the gauges.
摘要:
A system includes a component, an electronic circuit, and a display. The electronic circuit and the display are on the component. The electronic circuit is connected to receive data related to use of the component. The electronic circuit is connected to the display for providing a time parameter related to at least one from the group consisting of remaining life of the component and life expended by the component. The time parameter is for displaying on the display.
摘要:
The present disclosure is related to an amplifier circuit in which noise components are reduced to achieve a high SN ratio, a low noise, and a small area, and an amplifier circuit IC chip. An amplifier circuit (100) includes a converter (70) configured to convert a predefined physical quantity to a resistance value, and the resistance value converted by the converter (70) is converted to a voltage value and then amplified. The converter (70) includes variable resistance sensors (71, 72) of piezoresistance elements. A bias unit (80) is configured to determine a bias current of the converter (70), and includes bias resistances (81, 82). An operation amplifier unit (90) receives, as input signals, output signals from the bias unit (80) and the converter (70), and includes feedback resistances (91, 92) respectively connected to input and output ends of a first operational amplifier (101). The first operational amplifier (101) is a whole differential operational amplifier including a common-mode feedback circuit.
摘要:
Le procédé de mesure d'un paramètre physique est effectué avec un circuit électronique (1) à capteur résistif (2). Le capteur résistif comprend deux résistances (R1, R2) montées en série, dont un noeud de connexion lié à une masse mobile (M), est relié à une première entrée d'un amplificateur-comparateur (3). Une seconde entrée de l'amplificateur-comparateur reçoit une tension de référence. Une sortie de l'amplificateur-comparateur est reliée à une unité logique (4), qui fournit un signal numérique de sortie (OUT). Un convertisseur numérique-analogique (5) fournit une tension de mesure (V dac ), en fonction d'un signal numérique fourni par l'unité logique, à la première résistance (R1) dans une première phase d'un cycle de mesure, alors que la seconde résistance (R2) est polarisée par une tension de polarisation, et à la seconde résistance dans une seconde phase, alors que la première résistance est polarisée par une tension de polarisation via une unité de commutation.