摘要:
A method and a device for supplying a measurement electronics system in a fitting, through which a fluid flows, with electrical energy, which is generated in a turbine by the fluid flowing through the filling, wherein the flow quantities and pressures vary within wide boundaries, typically 1:1000. A pressure control device associated with the turbine controls the pressure of the fluid striking the turbine in such a manner that the electrical energy required for operating the measurement electronics system is generated with a small flow quantity, the pressure loss incurred by the fluid while flowing through the fitting being limited to a maximum value.
摘要:
The invention provides a torsional resonance frequency measuring device and method applicable to a large-scale power generating equipment or a traction motor equipment with a rotating shaft, such as a large power grid-tied wind turbine. The invention is characterized by employing a machine-side converter existing in the grid-tied wind turbine to output direct currents to a three-phase PMSG (permanent magnet synchronous generator), such that a pulse torque is generated to mechanically excite a rotor of the three-phase PMSG. Afterwards, a control circuit of the machine-side converter acquires back electromotive force generated by the mechanically excited rotor so as to calculate the torsional resonance frequency of the overall drive-chain system according to the frequency spectrum of the back electromotive force.
摘要:
A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). In desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface.
摘要:
A tester that measures pressure includes at least one pressure input port, at least one transducer, GPS communications, and a controller. The transducer measures pressure of the pressure input port. The controller is coupled with the transducer and the GPS communications such that the controller associates location data provided by the GPS communications with the pressure measured by the transducer to create a test result.
摘要:
The invention is for a method and apparatus for a pressure measuring cell for measuring a metered pressure, with a base body having at least one base body electrode and with a membrane body connected to the base body to form a sensor chamber, which has at least one membrane electrode and can be subjected to the pressure of a medium that is below the measurement pressure, wherein both the wall of the sensor chamber that is formed by the base body and the wall of the sensor chamber that is formed by the membrane body is covered with a protective layer; according to the invention, the protective layer is fashioned as a glass layer.
摘要:
A method is described for producing a pressure sensor assembly, the pressure sensor assembly having a sensor housing element having a pressure sensor and a base housing element, which have a continuous recess accommodating the pressure sensor and are welded to each other. It is provided that, after the welding, in the area of the welding connection, the recess of the base housing element and/or the sensor housing element is enlarged by material removal. A pressure sensor assembly is also described.
摘要:
A pressure sensor and method of use provides for the detection of a sudden increase or decrease of pressure within tubing during the administration of solutions to a patient. Detection of an occlusion, partial or other significant pressure change in the tubing is accomplished by measuring the compression and/or expansion of the tubing. Transfer of the change in force within the tubing is communicated from the tubing to a sensor by a transfer rod which as a membrane attached thereto to provide a seal thereabout.
摘要:
A method for verifying whether a technician is accurately monitoring one or more Leak Detection And Repair (LDAR) components. The method includes receiving a request to display an assignment. The assignment lists one or more LDAR components to be monitored in one or more areas. The assignment also lists one or more artificial LDAR components that do not exist in the areas. After receiving the request to display the assignment, the method includes displaying the assignment and receiving information regarding one of the artificial LDAR components.
摘要:
A pressure switch comprises a housing having a cavity for conveying a pressurized fluid. The cavity extends from an inlet to an outlet and defines a flow path for the fluid. A pressure-transducing element is provided for measuring the fluid pressure. The pressure-transducing element is in fluid communication with the cavity and is at least partially disposed in the flow path between the inlet and the outlet. The pressure-transducing element has a cylindrical shape with a constant diameter and is partially disposed in a bore in the housing. The bore has a constant bore diameter. One end of the pressure-transducing element extends into the flow path.
摘要:
A sensor assembly includes a sense element for sensing a sensed parameter. The sense element may provide a sense element output signal that is related to the sensed parameter. A control block may include a first input port for receiving the sense element output signal, a second input port for receiving a scale input adjustable by a user, and an output port for providing a sensor assembly output signal. The control block may be configured to take in the sense element output signal via the first input port and produce the sensor assembly output signal at the output port, wherein the sensor assembly output signal at the output port is related to the sense element output signal and corresponds to a user selected range of the sensed parameter. The user selected range may be determined, at least in part, by the scale input received via the second input port.