Abstract:
A sensor for measuring pressure and/or force comprises at least one measurement arrangement with at least one piezoelectric measurement element (2) which is subjected to a compression stress for dynamic pressure and/or force measurement, and a diaphragm (3) for introducing the pressure and/or the force to at least the piezoelectric measurement element. In order to specify a further embodiment of a sensor for pressure or force measurement that permits improved capturing of static and dynamic effects, a further measurement arrangement (4, 7) for static pressure and/or force measurement based on another physical measurement principle is proposed for this sensor.
Abstract:
Ce détecteur comporte un dispositif de commande (140) conçu pour fournir un signal électrique de commande (Vc) en réponse à une sollicitation mécanique, et un transducteur (118, 130), appelé transducteur d'émission, conçu pour convertir le signal électrique de commande (Vc) en un signal de détection. Il comporte en outre un élément piézoélectrique (114), appelé élément piézoélectrique d'alimentation, connecté électriquement au dispositif de commande (140) et conçu pour fournir, lorsque excité mécaniquement, une énergie électrique d'alimentation au dispositif de commande (140), et un dispositif d'excitation mécanique (116) de l'élément piézoélectrique d'alimentation (114) à partir de la sollicitation mécanique.
Abstract translation:
这种去检测器包括控制装置(140)CONç u到提供信号DE电控制(VC)随r的响应Eà 偏置M E机械,和换能器(118,130),来电德 Dé任务CON&ccedil的换能器; u到的信号DE电气控制(VC)转换成Dé检测的信号。 它还包括一个与eacute; Lé精神疾病英尺éZO电子电器(114),呼叫é ÉL E换货英尺éZOé电力,连接é É电至所述控制装置(140)和CONç u到提供,当激发Dé M E caniquement解能量Dé功率电给控制装置(140),并且所述E L E换货PIéZODé供给电的激励装置M E机械(116) (114)à 来自偏置M E机械 P>。
Abstract:
In order to operate an electromechanical converter system comprising at least one piezoelectric converter element, if necessary at least an identification element, and control electronics, the useful signals of a certain useful operating range defined by the frequency band and time window, which signals are associated with at least one piezoelectric converter, as well as polling and response signals for identifying and/or checking the function of the converter system are transmitted by means of a line system comprising only one electric signal line. In order to enable a simple and reliable diagnosis possibility of the input circuit for cable breaks, that suitably increases the operational reliability, shortens the troubleshooting times, and simplifies the operation, at least one polling signal located outside of the useful operating range of the converter element is transmitted to the converter system, and at least one characteristic value is formed from the resulting response signal and polled for at least one previously determined criterion, wherein an error message is generated when the criterion is not met.
Abstract:
A method for both detecting and analyzing a change in the loading condition of a structure. A flexible substrate is employed, in which a distributed network of sensors is built. This substrate is either affixed to the surface of the structure, or built within it, so as to be able to detect propagating stress waves. After load change is detected, the resulting sensor signals are analyzed to determine the location, severity, and/or any characteristic frequencies of the load change. This information is then used to determine an appropriate response.
Abstract:
A load cell device includes a load cell structure formed of a suitable metal and including vertically spaced apart, generally parallel horizontal elements (14, 15) integrally formed with longitudinally spaced apart, generally parallel vertical elements (12, 13). Flexures (16, 17) interconnect each horizontal element with the vertical elements. A bending beam (18) extends between and is interconnected with the horizontal or vertical elements. When a load is applied vertically and perpendicularly to one of the horizontal elements, the load cell structure will elastically deform as a parallelogram to thereby transfer shear force to the bending beam to cause shearinduced bending of the latter. Strain gages or frequency resonator crystal elements sense the shearinduced bending and are embodied in electronic circuitry which produces an output signal caused by deformation of the bending beam. The electronic circuitry is operable to convert the output signal to a perceptive force readout.
Abstract:
A vibrating beam resonator (10) is formed with a unitary isolator mass (12, 13) at each end of the vibratory beam. Isolator springs (14), (15) connected to the unitary masses are joined to mounts (16), (17). Forces (29), (30) applied to the mounts cause the vibrating beam frequency to vary to enable precise force measurements. With this arrangement, fewer cutting operations are required to produce the vibrating beam resonator than were necessary with known resonators. In a preferred embodiment, a side of the vibratory beam is formed by an edge of the crystal blank from which the resonator is cut to further reduce cutting time. This also permits cuts to be made from only one side of the blank.
Abstract in simplified Chinese:于根据本发明之压电振动式力传感器中,振动被一压电体及一限制构件间之摩擦力所限制,且因此与一该振动系直接由一与振动方向相同之方向被限制的案例作比较,传感力之范围能被扩大。引线被直接软焊以于电连接该压电体至一外部控制电路的传统结构,由于附接至该压电体之焊料而造成该振动之限制,导致该传感范围变窄。使用该压电振动式力传感器,该传感力之范围能借由造成一状态被扩大,在该状态中,该压电体及该限制构件之导电部份不被固定,但互相接触以保持导电性。
Abstract:
A resonator is suitable for reducing or suppressing a force transmitted by a vibrating portion of the resonator to a support part. To this end, the vibrating portion includes two extensions which are each meander shaped such that two segments of each extension have respective speed components that are oriented in opposite directions. Such a resonator, which is balanced, can advantageously be used within a rate gyro or a force sensor.
Abstract:
A physical quantity detecting device includes a vibrating element and a charge amplifier. The vibrating element includes a first detection electrode, a second detection electrode, a third detection electrode, and a fourth detection electrode. The first and fourth detection electrodes have the same electrical polarity, the second and third detection electrodes have the same electrical polarity, and the first and second detection electrodes have opposite electrical polarities. The first and fourth detection electrodes are connected to the charge amplifier, and the second and third detection electrodes are connected to the charge amplifier.