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公开(公告)号：US20180328804A1
公开(公告)日：2018-11-15
申请号：US15775253
申请日：2016-10-14
申请人： Robert Bosch GmbH
发明人： Stefan Zehringer , Zoltan Lestyan , Richard Fix , Jochen Franz , Michaela Mitschke , Tobias Sebastian Frey
CPC分类号： G01L9/085 , G01L9/0052 , G01L19/0092
摘要： A sensor element for a pressure sensor, includes a sensor membrane on which a defined number of piezoresistors are situated, the piezoresistors being configured in a circuit in such a way that, when there is a change in pressure an electrical change in voltage can be generated; at least two temperature measuring elements configured in relation to the sensor membrane in such a way that temperatures of the sensor membrane at positions of the piezoresistors can be measured using the temperature measuring elements, an electrical voltage present at the circuit of the piezoresistors due to a temperature gradient being capable of being compensated computationally using the measured temperatures.
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公开(公告)号：US07389680B2
公开(公告)日：2008-06-24
申请号：US11232784
申请日：2005-09-21
申请人： Uwe Kassner
发明人： Uwe Kassner
IPC分类号： G01M15/00
CPC分类号： G01L23/22 , F02D35/023 , F02D35/025 , F02D41/28 , F02D2041/281 , F02D2041/285 , G01L9/085 , G01L23/10
摘要： A method and a device for analyzing a sensor element are described, which allow a temperature dependence of the sensor element to be considered without an additional temperature sensor in particular. The sensor element outputs a signal as a function of a measured variable. The signal of the sensor element is analyzed in a first analysis operating mode to detect the measured variable. The signal of the sensor element is analyzed in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable.
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公开(公告)号：US07042288B2
公开(公告)日：2006-05-09
申请号：US10433330
申请日：2001-11-27
申请人： Masayoshi Matsui , Koji Okazaki
发明人： Masayoshi Matsui , Koji Okazaki
摘要： An object of the present invention is to provide a charge amplifier which can be operated at low cost so that electric charge generated in a piezoelectric pressure sensor having one end grounded is converted into a voltage signal.In the charge amplifier (1) according to an embodiment of the present invention, a plus side power source input terminal of an operational amplifier (5) is connected to a plus power source (+5 V) while a minus side power source input terminal of the operational amplifier (5) is grounded, so that the operational amplifier (5) is supplied with a single power source. Further, an offset voltage lower than the plus power source voltage but higher than the ground potential is applied to a non-inverted input terminal of the operational amplifier (5). Accordingly, change of pressure in both positive and negative directions can be converted into a voltage signal with the offset voltage as its center though the operational amplifier (5) is driven by a single power source. That is, cost can be suppressed because a double power source is not required.
摘要翻译： 本发明的目的是提供一种可以以低成本操作的电荷放大器，使得在具有一端接地的压电式压力传感器中产生的电荷被转换为电压信号。 在根据本发明的实施例的电荷放大器（1）中，运算放大器（5）的正侧电源输入端连接到正电源（+ 5V），而负侧电源输入端 运算放大器（5）接地，使得运算放大器（5）被提供有单个电源。 此外，低于正电源电压但高于接地电位的偏移电压被施加到运算放大器（5）的非反相输入端子。 因此，通过运算放大器（5）由单个电源驱动，正负方向的压力变化可以转换为以偏移电压为中心的电压信号。 也就是说，可以抑制成本，因为不需要双电源。
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公开(公告)号：US20050062514A1
公开(公告)日：2005-03-24
申请号：US10943569
申请日：2004-09-17
CPC分类号： G01L23/222 , G01L9/085 , G01L23/10
摘要： Positive charges of a sensor element are stored in a capacitor for converting a voltage, are converted into a positive voltage by an amplifier, and then are outputted. When the polarity of the charges of the sensor element are inverted to the negative, the charges inversely flow from the capacitor for converting the voltage and feed back to an equivalent capacitor of the sensor element, and an output of the amplifier reduces and returns to a zero-point, an automatic correcting circuit makes an FET conductive and the charges are discharged in order to prevent the fluctuation of the zero-point level due to the negative drift.
摘要翻译： 传感器元件的正电荷存储在用于转换电压的电容器中，由放大器转换成正电压，然后被输出。 当传感器元件的电荷的极性反转为负时，电荷从电容器反向流动，用于转换电压并反馈到传感器元件的等效电容器，并且放大器的输出减小并返回到 零点，自动校正电路使FET导通并且电荷被放电，以便防止由于负漂移引起的零点电平的波动。
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公开(公告)号：US20040183398A1
公开(公告)日：2004-09-23
申请号：US10801390
申请日：2004-03-15
IPC分类号： H01L041/113
CPC分类号： H03F13/00 , G01L9/085 , G01L23/222 , H03F3/45475 , H03F3/45973 , H03F3/70
摘要： A positive charge of a sensor element is charged in a signal converting circuit, is converted into a positive voltage, and is outputted. When the polarity of the charge of the sensor element is inverted to the negative and an output of the signal converting circuit is decreased, the leaked charges are superimposed and become the negative. An automatic correction circuit detects the negative output and discharges the charges so as to set the input to null0null. Thus, the offset of the signal level due to the charge leakage is automatically corrected.
摘要翻译： 传感器元件的正电荷在信号转换电路中充电，被转换为正电压，并被输出。 当传感器元件的电荷的极性反转到负极并且信号转换电路的输出减小时，泄漏的电荷被叠加并变为负值。 自动校正电路检测负输出并放电，以将输入设置为“0”。 因此，由于电荷泄漏引起的信号电平的偏移被自动校正。
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6.发明授权
公开(公告)号：US5945667A
公开(公告)日：1999-08-31
申请号：US005044
申请日：1998-01-09
申请人： Klaus Bohnert , Pascal Pequignot
发明人： Klaus Bohnert , Pascal Pequignot
CPC分类号： G01R15/247 , G01D3/028 , G01D5/344 , G01L9/008 , G01L9/085
摘要： The piezoelectric effect of an optical sensor (6) made from quartz is a function of temperature. Without correcting or compensating measures, this temperature dependence leads to a falsification of the measuring signal if the temperature of the sensor element is not held constant. In order to obtain accurate measurements for variable sensor temperatures T.sub.s, a temperature-corrected measuring signal M is provided in accordance with:M=U13.multidot.(1+.alpha..multidot.(T.sub.0 -T.sub.s)),U13 signifying a control signal, T.sub.0 a prescribable calibration temperature of the sensor (6), and .alpha. the temperature coefficient of the sensor (6). In this case, the sensor temperature (T.sub.s) is calculated in accordance with:T.sub.s =f(K,E(U.sub.Tr)),K being a contrast parameter which is calculated from light power signals (U1, U2), is a function of the sensor temperature (T.sub.s) and is proportional to the interference contrast, and U.sub.Tr signifying a signal receiver temperature signal and T.sub.r signifying a signal receiver temperature. The contrast parameter (K) is arrived at by virtue of the fact that an oscillator signal (U.sub.HF) of prescribable amplitude is superimposed on a control signal (U13) of a differential voltage regulator (11), the frequency (f) of said oscillator signal being at least so high that a light modulation effected in the receiving fiber (r) by the oscillator signal (U.sub.HF) is not compensated by the differential voltage regulator (11).
摘要翻译： 由石英制成的光学传感器（6）的压电效应是温度的函数。 没有校正或补偿措施，如果传感器元件的温度不保持恒定，则该温度依赖性导致测量信号的伪造。 为了获得可变传感器温度Ts的精确测量，根据以下公式提供温度校正测量信号M：M = U13x（1 +αx（T0-Ts）），表示控制信号的U13，可规定的校准 传感器（6）的温度，和传感器（6）的温度系数α。 在这种情况下，传感器温度（Ts）根据：Ts = f（K，E（UTr））计算，K是从光功率信号（U1，U2）计算的对比度参数，K是 传感器温度（Ts）与干扰对比度成比例，UTr表示信号接收器温度信号，Tr表示信号接收器温度。 对比度参数（K）由于以下事实而得到，即：将规定幅度的振荡器信号（UHF）叠加在差分电压调节器（11）的控制信号（U13）上，所述振荡器的频率（f） 信号至少高到通过振荡器信号（UHF）在接收光纤（r）中实现的光调制不被差分电压调节器（11）补偿。
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公开(公告)号：US5371472A
公开(公告)日：1994-12-06
申请号：US4415
申请日：1993-01-14
申请人： Franz Wohlstreicher
发明人： Franz Wohlstreicher
CPC分类号： G01L1/16 , G01L23/10 , G01L23/222 , G01L23/225 , G01L9/085
摘要： A charge amplifier for sensors outputting electrical charge, particularly for piezoceramic pressure sensors, includes a voltage integrator having an output, an integration capacitor and a resistor connected parallel to the integration capacitor. A current-to-voltage converter is connected upstream of the voltage integrator and has an input. A negative feedback branch has a series circuit of a farther voltage integrator and a voltage-to-current converter. The negative feedback branch is connected between the output of the voltage integrator and the input of the current-to-voltage converter.
摘要翻译： 用于输出电荷的传感器的电荷放大器，特别是用于压电陶瓷压力传感器的电荷放大器包括具有输出，积分电容器和并联于积分电容器的电阻器的电压积分器。 电压 - 电压转换器连接在电压积分器的上游并具有输入。 负反馈支路具有更远的电压积分器和电压 - 电流转换器的串联电路。 负反馈支路连接在电压积分器的输出端与电流 - 电压转换器的输入端之间。
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公开(公告)号：US5307683A
公开(公告)日：1994-05-03
申请号：US926097
申请日：1992-08-05
申请人： Eric B. Phelps , Gary R. Cook , Wayne O. Roszelle
发明人： Eric B. Phelps , Gary R. Cook , Wayne O. Roszelle
CPC分类号： G01L27/005 , G01L9/085
摘要： Disclosed is a system wherein the compensation for temperature effects on a pressure measurement gauge are accomplished by processing the raw pressure measurement signal from the gauge through a linear differential equation to produce a thermally compensated measurement. The linear differential equation expresses the thermally compensated pressure determination as a relation between a derivative of temperature and a derivative of pressure error. The linear differential equation contains several coefficients having constant values, and these constant values are computed by calibrating the pressure gauge in a pressure tank having a known pressure and temperature. When the gauge is later placed in an oil or gas well, the coefficient values are used to obtain the corrected measured pressure from the raw measured pressure received from the gauge.
摘要翻译： 公开了一种系统，其中对压力测量计的温度影响的补偿通过经由线性微分方程处理来自量规的原始压力测量信号来实现，以产生热补偿测量。 线性微分方程表示热补偿压力确定为温度导数与压力误差导数之间的关系。 线性微分方程包含具有恒定值的几个系数，并且通过校准具有已知压力和温度的压力罐中的压力计来计算这些常数值。 当量规稍后放置在油井或气井中时，系数值用于从从量规接收的原始测量压力获得校正的测量压力。
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公开(公告)号：US4995263A
公开(公告)日：1991-02-26
申请号：US450857
申请日：1989-12-14
申请人： Rudolf Stocker
发明人： Rudolf Stocker
CPC分类号： G01L9/0022 , G01L19/04 , G01L21/22 , G01L9/085
摘要： The tuning fork quartz manometer has a tuning fork quartz (2) mounted in a protective casing (3) which is in turn part of a self-oscillating feedback circuit. According to the invention the protective casing (3) is inserted by means of a sealing compound (4) or directly into a hosing (5) of a measuring head (1,6) or a mounting support (15a, 20') so that the mounting support can in turn be inserted in the measuring head (1,6) and, as desired, an ideal rigid or elastic suspension is provided. A measuring circuit (20) is located directly in the measuring head close to the tuning gork quartz (2) and is thermally coupled to the latter. The measuring circuit (20) preferably has a temperature correction network (R.sub.1, R.sub.2, 22) high frequency coupled from the feedback circuit containing the tuning fork quartz.
摘要翻译： 音叉石英压力计具有安装在保护壳体（3）中的音叉石英（2），该保护壳又是自振荡反馈电路的一部分。 根据本发明，保护壳体（3）通过密封化合物（4）或直接插入测量头（1,6）或安装支撑件（15a，20'）的软管（5）中，使得 安装支撑件又可插入到测量头（1,6）中，并且根据需要，提供理想的刚性或弹性悬挂。 测量电路（20）直接位于靠近调音石英（2）的测量头中，并与之耦合。 测量电路（20）优选地具有从包含音叉石英的反馈电路耦合的高频耦合的温度校正网络（R1，R2,22）。
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公开(公告)号：US09689766B2
公开(公告)日：2017-06-27
申请号：US14432528
申请日：2013-09-24
发明人： Benjamin Lemke , Rene Ziermann , Sebastian Pobering , Ralf Roder
CPC分类号： G01L9/065 , G01L9/0042 , G01L9/0052 , G01L9/085
摘要： A pressure sensor, comprising: a substrate having a measuring membrane, and an electrically conductive cover layer, which has electrical contact elements and is electrically isolated from the substrate by an insulating layer. The cover layer is divided in such a manner that two independent measurements of the respective resistance between two contact elements are possible in two regions electrically isolated from one another. The regions of the cover layer serve to shield external electromagnetic influences from the sensor elements of the measuring membrane, to detect damage to the measuring membrane, as well as for determining exact temperature.
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