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    • 17. 发明申请
    • DIELECTRICALLY ISOLATED RESONANT MICROSENSORS
    • 电介质隔离型MICROSENSORS
    • WO1995004265A2
    • 1995-02-09
    • PCT/US1994008258
    • 1994-07-22
    • HONEYWELL INC.
    • HONEYWELL INC.BURNS, David, W.
    • G01N00/00
    • H04R17/025G01L1/183G01L9/0019G01P15/0802G01P15/097G01P2015/0828
    • A resonant strain gauge includes a silicon substrate, a polysilicon flexure beam fixed at both ends relative to the substrate, and a polysilicon rigid cover cooperating with the substrate to enclose the flexure beam within a sealed vacuum chamber. An upper bias electrode is formed on the cover, and a lower bias electrode is formed at the bottom of a trough in the substrate directly beneath the flexure beam. A drive electrode and a piezoresistive element are supported by the beam, formed over a silicon nitride thin film layer deposited onto the top surface of the flexure beam. A second silicon nitride layer covers the drive electrode and piezoresistor, cooperating with the first silicon nitride layer to dielectrically encapsulate the drive electrode and piezoresistor. The silicon nitride further extends outwardly of the beam to a location between the polysilicon layer that contains the beam, and the cover, to isolate the cover from the flexure beam. A polysilicon film is applied over the upper silicon nitride layer as a passivation layer to protect the silicon nitride during gauge fabrication. The process for fabricating the gauge includes a sequence of applying the various polysilicon and silicon nitride layers by low pressure chemical vapor deposition, in combination with selective etching to define the flexure beam, electric circuit components and vacuum chamber.
    • 共振应变计包括硅衬底,相对于衬底的两端固定的多晶硅弯曲梁,以及与衬底配合的多晶硅刚性盖,以将挠曲梁封闭在密封的真空室内。 在盖上形成上部偏置电极,并且在弯曲梁正下方的基板的底部的底部形成下部偏置电极。 驱动电极和压阻元件由光束支撑,形成在沉积在挠曲束的顶表面上的氮化硅薄膜层上。 第二氮化硅层覆盖驱动电极和压电电阻器,与第一氮化硅层配合以介电地封装驱动电极和压敏电阻器。 氮化硅进一步从梁的外侧延伸到包含梁的多晶硅层与盖之间的位置,以将盖与弯曲梁隔离。 将多晶硅膜施加在上部氮化硅层上作为钝化层,以在量规制造期间保护氮化硅。 用于制造该量规的方法包括通过低压化学气相沉积施加各种多晶硅和氮化硅层的顺序,与选择性蚀刻结合以限定挠曲束,电路部件和真空室。
    • 19. 发明公开
    • 속도 및 차선의 변경을 고려한 주행 차량의 무게 측정 시스템 및 그 측정 방법
    • 一个重量测量系统及其在改变地面和改变驾驶速度的时候的方法
    • KR1020120053754A
    • 2012-05-29
    • KR1020100115034
    • 2010-11-18
    • 박제우김영백
    • 박제우김영백
    • G01G19/03G01G19/02G08G1/052
    • G01G19/03G01G3/165G01G19/62G01L1/183
    • PURPOSE: A system and a method for measuring weight of a traveling vehicle in consideration of change of speed and lanes are provided to accurately measure a weight of a vehicle even though the centroid of the vehicle is inclined toward the left side or right side because a weight value measured by a piezo-sensor is revised according to an acceleration value. CONSTITUTION: A system for measuring weight of a traveling vehicle in consideration of change of speed and lanes comprises three piezo sensor groups(P10,P20,P30) arranged lengthways side by side at constant intervals, a pair of loop sensor groups(L10,L20) arranged in the outer side around the piezo-sensor groups at constant intervals, a pair of the piezo sensor groups(P40,P50) arranged in the outer side of the loop sensor groups at constant intervals, a pair of the loop sensor groups(L30,L40) arranged in the outer side of the piezo sensor groups at constant intervals, and a server. The server receives information from loop sensor groups and calculates a weight of a vehicle by multiplying left and right bias correction coefficients by the weight of the left and right wheels.
    • 目的:提供考虑到速度和车道变化来测量行驶车辆的重量的系统和方法,以精确地测量车辆的重量,即使车辆的重心向左侧或右侧倾斜,因为 由压电传感器测量的重量值根据加速度值进行修正。 考虑到速度和车道变化来测量行驶车辆的重量的系统包括以恒定间隔并排布置的三个压电传感器组(P10,P20,P30),一对环路传感器组(L10,L20 )以一定间隔布置在压电传感器组周围的外侧中,布置在环传感器外侧的一对压电传感器组(P40,P50)以恒定间隔组合,一对环传感器组 L30,L40)和服务器。 服务器从环路传感器组接收信息,并通过将左右偏置校正系数乘以左右车轮的重量来计算车辆的重量。