摘要:
A remotely interrogatable pressure transition indicator (100) having a pressure sensitive element (110) interacting with a remotely interrogatable mechanical switch (120). The pressure sensitive element (110) is a hermetically sealed, gas impermeable, flexible walled sachet (110) containing a quantity of gas, operable for transitioning between inflated and deflated conditions induced by a change in external gaseous pressure experienced by the sachet (110). The sachet (110) interacts with the mechanical switch (120) to producing a first interrogatable value when the sachet (110) is inflated and a second interrogatable value when the sachet (110) is deflated.
摘要:
A method for detecting an error in a bridge sensor which is adapted for measuring a physical parameter. The method comprises biasing a first contact pair of the bridge sensor at least two times in a first direction and at least one time in a second direction opposite to the first direction; while biasing the first contact pair, measuring an output signal on a different contact pair of the bridge sensor, thus obtaining at least three output measurements which are representative for the physical parameter and which are separated by time intervals; combining the output measurements to obtain an output value which is indicative for an error in the bridge sensor, wherein the output measurements which are combined are only those output measurements which are measured when biasing the first contact pair.
摘要:
A module is operable to monitor at least a pressure within a tire of a wheel, the module being operatively mounted to said wheel, the module including (a) a pressure sensor for measuring the pressure (P) and generating a corresponding pressure signal; and b1) an associated data memory including a data field containing data relevant to the functional status of the tire.
摘要:
A field device commissioning system, may include, but is not limited to, a commissioning tool. The commissioning tool is configured to communicate with a plurality of field devices and a repository. The commissioning tool is configured to: provide a user interface with at least one template of a plurality of templates in the repository for selection; determine, using at least one parameter in at least one of a control system loop information file and a field device information file in the repository, check functions for at least one of the plurality of field devices; provide the user interface with information which identifies at least one of the plurality of field devices for selection; and generate, using a selected template, tasks associated with the determined check functions for the selected at least one field device.
摘要:
Provided are: a vacuum gauge that, with a simple configuration, can accurately diagnose the degree of contamination of the vacuum gauge; and a contamination diagnosis method that, with a simple process, can accurately diagnose the degree of contamination of a vacuum gauge. Provided is a cold cathode ionization vacuum gauge that has a normal operation mode and a contamination diagnosis mode, the cold cathode ionization vacuum gauge comprising: an anode 1 and a cathode 3 that are for measuring vacuum pressure in the normal operation mode; an anode 7 and the cathode 3 that are for measuring the vacuum pressure in the contamination diagnosis mode; and a controller 10 that compares the size of a current measured between the anode 7 and the cathode 3 and the size of a current measured between the anode 1 and the cathode 3.
摘要:
Provided are a dynamic quantity measuring device having higher accuracy and longer-term reliability than in the prior art, and a pressure sensor using the same. A dynamic quantity measuring device is provided with a first Wheatstone bridge configured by an impurity diffused resistor on a principal surface of one semiconductor substrate, and detects a difference between strain quantities respectively generated in an x-axis direction and a y-axis direction that are orthogonal to each other on the principal surface of the semiconductor substrate by the first Wheatstone bridge, the dynamic quantity measuring device being provided with, on the principal surface of the semiconductor substrate, a second Wheatstone bridge for detecting the strain quantity in the x-axis direction, and a third Wheatstone bridge for detecting the strain quantity in the y-axis direction.
摘要:
A device for measuring pressure having at least one pressure sensor with at least one active sensor surface, an oscillating and/or variable temperature counter-surface arranged opposite the at least one sensor surface, wherein the sensor surface and the counter-surface are arranged in a hollow body, and the hollow body has at least one opening, and wherein at least one alternating signal amplifier is provided.
摘要:
The invention relates to a device for monitoring a probe for measuring the pressure of a flow; the probe comprising an internal volume; the device comprising: an acoustic transmitter and receiver, connection means intended to connect the device to the probe, for the transmitter to transmit an acoustic signal in the internal volume and for the receiver to pick up an acoustic signal in the internal volume. The device also comprises an electronic module comprising: an audio transmission and reception circuit, linked to the transmitter and to the receiver by analog link, a non-erasable memory comprising a digital encryption key, an erasable read-only memory, a digital communication interface, configured to transmit or receive digital signals between the outside of the device and the audio circuit, the non-erasable memory and the erasable read-only memory.
摘要:
A semiconductor device 3 for sensing a physical quantity adjusts the output characteristic of a pressure sensor, for example, based on trimming data stored in an EPROM 34. A comparator 311 compares an input voltage given to a terminal 43 and a predetermined reference voltage, and delivers a write control signal for EPROM 34. When the comparator 311 delivers a Low signal for the EPROM 34, a first gate circuit 312 provided between the terminal 43 and a temperature sensor 32 connects the terminal 43 and the temperature sensor 32. A second gate circuit 313 provided between the terminal 43 and a pull-down resistor 314 disconnects the terminal 43 and the pull-down resistor 314. The operational voltage of the temperature sensor 32 is lower than the reference voltage, and the terminal 43 is used as an output terminal for the temperature sensor 32.
摘要:
An output specification calibrating apparatus for a capacitive pressure sensor. The output specification calibrating apparatus enables adjustment of non-linearity, offset, and gain of the capacitive pressure sensor in a software manner at the time of shipment. Accordingly, it is feasible to easily adjust output specifications of the capacitive pressure sensor and to thereby meet various needs of customers.