Piezoelectric force sensor
    11.
    发明授权
    Piezoelectric force sensor 失效
    压电力传感器

    公开(公告)号:US5499541A

    公开(公告)日:1996-03-19

    申请号:US278667

    申请日:1994-07-21

    IPC分类号: G01L1/18 G01P15/09 G01L25/00

    摘要: A piezoelectric force sensor includes a piezoelectric plate, with one electrode on each of the top and bottom sides of the plate. One of the electrodes is electrically connected via a conductor to a contact pad. In the case that the piezoelectric plate experiences breakage, the conductor is broken, and the remaining residual capacitance of the conductor and contact pad becomes so comparatively small that the breakage can be reliably detected.

    摘要翻译: 压电力传感器包括压电板,在板的顶侧和底侧各有一个电极。 电极中的一个通过导体电连接到接触垫。 在压电板遇到破损的情况下,导体断裂,并且导体和接触焊盘的剩余电容变得相当小,从而可以可靠地检测断裂。

    Measuring cell for use with a sensor for measuring the mixture ratio of
liquids
    13.
    发明授权
    Measuring cell for use with a sensor for measuring the mixture ratio of liquids 失效
    用于测量液体混合比的传感器的测量单元

    公开(公告)号:US5418465A

    公开(公告)日:1995-05-23

    申请号:US50057

    申请日:1993-06-22

    IPC分类号: G01N27/22 G01N33/28 G01R27/26

    摘要: A sensor for measuring the mixture ratio of liquids, particularly of fuel mixtures, comprises a measuring cell, which has a cavity with one inlet and one outlet. The liquid is directed through the cavity, whereby regions of the inner wall of the cavity are electrically conductive and, together with at least one additional electrically conductive surface, form a capacitor, which is a component of an evaluation circuit. The measuring cell is manufactured from at least two ceramic carriers, which are connected by way of at least one connection layer to form a layer arrangement. The cavity is produced between the ceramic carriers as the result of the lack of at least one connection layer in certain regions. In each case, at least one electrode is applied, in the vicinity of the cavity, to the ceramic carrier delimiting the cavity using thick-film technology.

    摘要翻译: PCT No.PCT / DE91 / 00798 Sec。 371日期:1993年6月22日 102(e)日期1993年6月22日PCT 1991年10月10日PCT PCT。 出版物WO92 / 08126 日期:1992年5月14日。用于测量液体,特别是燃料混合物的混合比的传感器包括具有一个入口和一个出口的空腔的测量池。 液体被引导通过空腔,由此腔的内壁的区域是导电的,并且与至少一个额外的导电表面一起形成作为评估电路的组件的电容器。 测量单元由至少两个陶瓷载体制成,其通过至少一个连接层连接以形成层布置。 由于在某些区域缺少至少一个连接层,在陶瓷载体之间产生空腔。 在每种情况下,至少一个电极在空腔附近施加到使用厚膜技术限定空腔的陶瓷载体上。

    Fluid-based acceleration and tilt sensor
    16.
    发明授权
    Fluid-based acceleration and tilt sensor 失效
    基于流体的加速和倾斜传感器

    公开(公告)号:US5279040A

    公开(公告)日:1994-01-18

    申请号:US896898

    申请日:1992-06-10

    摘要: A sensor (10) for measurement of acceleration and/or tilt of a movable object, particularly a motor vehicle, features an interior space (12) partially filled with fluid (15). Within that space, at least two heatable, temperature-sensitive electrical circuit elements are arranged so that, in a rest or initial position of the sensor, they are equally covered or wetted by the fluid. If the acceleration and tilt of the movable object are both zero, or the two cancel each other out, the sensor reading is zero. If this is not the case, the acceleration or tilt leads to a differing degree of coverage or wetting of the at least two circuit elements, and thus to a non-zero sensor reading.

    摘要翻译: 用于测量可移动物体,特别是机动车辆的加速度和/或倾斜的传感器(10)具有部分填充有流体(15)的内部空间(12)。 在该空间内,设置至少两个可加热的温度敏感的电路元件,使得在传感器的休息或初始位置,它们被流体同等地覆盖或润湿。 如果可移动物体的加速度和倾斜度均为零,或两者彼此抵消,传感器读数为零。 如果不是这种情况,则加速度或倾斜导致至少两个电路元件的不同程度的覆盖或湿润,从而导致非零传感器读数。

    Acceleration sensor with oppositely-polarized piezoelectric plates
    19.
    发明授权
    Acceleration sensor with oppositely-polarized piezoelectric plates 失效
    具有相反极化压电板的加速度传感器

    公开(公告)号:US5473930A

    公开(公告)日:1995-12-12

    申请号:US384238

    申请日:1995-02-06

    CPC分类号: G01P21/00 G01P15/0922

    摘要: An acceleration sensor, which is particularly adapted for use in motor vehicles, is improved by structuring it to be readily testable, to assure reliability before installation. The acceleration sensor has a piezo element (1), which consists of at least two piezo-electric plates (2) placed on top of each other, the piezo-electrical polarization of which is oriented in opposite directions. At least two electrodes (9) are placed on each of the topside (7) and the underside (8) of the piezo element (1). For testing the sensor, the piezo element is deformed by the application of an electrical voltage to electrodes (9) of a first lateral portion (11a) of the piezo element. This deformation is detected by means of a deformation-generated voltage at the electrodes (9) of a second lateral portion (11b) of the piezo element.

    摘要翻译: 特别适用于机动车辆的加速度传感器通过将其构造成易于测试而得到改进,以确保安装前的可靠性。 加速度传感器具有压电元件(1),该压电元件(1)由至少两个放置在彼此顶部的压电板(2)组成,其压电电极化方向相反。 至少两个电极(9)被放置在压电元件(1)的顶侧(7)和下侧(8)的每一个上。 为了测试传感器,压电元件通过对压电元件的第一横向部分(11a)的电极(9)施加电压而变形。 通过压电元件的第二横向部分(11b)的电极(9)处的变形产生的电压来检测该变形。

    Sensor for measuring acceleration and tilt with a bubble level
    20.
    发明授权
    Sensor for measuring acceleration and tilt with a bubble level 失效
    用于测量气泡高度的加速度和倾斜度的传感器

    公开(公告)号:US5351539A

    公开(公告)日:1994-10-04

    申请号:US839757

    申请日:1992-05-26

    摘要: A sensor is proposed which is used for detecting the acceleration and the inclination of a movable object (10), in particular a motor vehicle. A bubble level (11) is fixed on the object (10). The bubble level (11) comprises a housing (12), a liquid (16) contained in the housing (12) and a gas bubble (17) contained in the housing (12). The liquid (16) and the gas bubble (17) together completely fill the hollow chamber (15) enclosed by the housing (12), so that the gas bubble (17) is not completely enclosed by the liquid (16), but lies against the interior of the housing (12), so that the surface separating the liquid and the gas pushes against the interior of the housing (12). The gas bubble (17) is in an initial position inside the housing (12) when the acceleration and the inclination of the bubble level (11) are equal to zero or their effects are mutually canceled out. On the inside of the housing (12), within that area over which the gas bubble (17) extends in the said initial position, an electrically heatable, temperature-sensitive electrical circuit element (RS) is disposed, which is a component of an evaluation circuit, which generates an output signal (U.sub.D) which is a function of the acceleration and the inclination of the bubble level (11).

    摘要翻译: PCT No.PCT / DE90 / 00862 Sec。 371日期:1992年5月26日 102(e)日期1992年5月26日PCT 1990年11月13日PCT PCT。 公开号WO90 / 08492 日期:1991年6月13日。提出了一种用于检测可移动物体(10),特别是机动车辆的加速度和倾角的传感器。 气泡水平(11)固定在物体(10)上。 气泡高度(11)包括壳体(12),容纳在壳体(12)中的液体(16)和容纳在壳体(12)中的气泡(17)。 液体(16)和气泡(17)一起完全填充由壳体(12)包围的中空室(15),使得气泡(17)不被液体(16)完全包围,而是位于 抵靠壳体(12)的内部,使得分离液体和气体的表面推动抵靠壳体(12)的内部。 当气泡水平(11)的加速度和倾斜度等于零或其效果相互抵消时,气泡(17)处于壳体(12)内的初始位置。 在壳体(12)的内部,在气泡(17)在所述初始位置延伸的区域内,设置可电加热的温度敏感电路元件(RS),其是 评估电路,其产生作为气泡水平(11)的加速度和倾斜度的函数的输出信号(UD)。