An apparatus includes a sensor module, an offset diagnostic module, and a notification module. The sensor module is in operative communication with a cylinder pressure sensor and structured to acquire cylinder pressure data from the cylinder pressure sensor indicative of an actual in-cylinder pressure of a cylinder of an engine. The offset diagnostic module is structured to interpret the cylinder pressure data to determine an offset of the cylinder pressure sensor based on a reference in-cylinder pressure and the actual in-cylinder pressure. The notification module is structured to provide an offset error notification responsive to the offset being greater than a threshold offset.

A load cell input unit capable of determining whether load cell connection cables have a broken line is provided. When the load cell input unit (30) is in a broken line detection mode, a voltage applying element (311) applies a voltage to distribution lines of an amplifying element (31), and a broken line determination element (33) determines whether the load cell connection cables (40) have a broken line based on a voltage measured by a load measuring element (32).

Facilitating fault detection of a system using a test input comprising a linear combination of inputs of the system is presented herein. A system can comprise a test signal component that generates, via a test procedure, a test input signal comprising a first linear combination of at least two input signals of the system, and applies the test input signal to the system during a phase of respective phases of the test procedure; and a fault detection component that detects a fault of the system based on a test output signal corresponding to the test input signal and a second linear combination of respective output signals of the system corresponding to the at least two input signals.

A method for checking the plausibility of a pressure sensor that, during the measurement of a differential pressure, records measured values, whereby the measured values from the pressure sensor are compared to reference values for the differential pressure calculated on the basis of a model; whereby in order to determine the plausibility, at least one deviation of the measured values from the reference values and a difference between a first slope of the changing measured values and a second slope of the changing reference values over the curve of the measured values are taken into account.

The invention relates to an expansion body having an equalization chamber, which is separated by an elastic diaphragm from a fluid which flows through part of the expansion body. A mechanical spring applies an additional spring force to the diaphragm, wherein the spring has mechanical prestress. In addition, the invention relates to an SCR system with such an expansion body, and a method for monitoring a pressure sensor in such a SCR system with an expansion body. The method comprises the following steps: first, an anticipated characteristic pressure at which the spring force of the spring of the expansion body is overcome is defined by setting the prestress of the spring in the expansion body.

Methods, systems, and computer program products for monitoring a building pressurization without penetrating an envelope of a building. The system includes one or more processors and a memory coupled to the processors. The memory stores data comprising program code that, when executed by the processors, causes the system to receive at least one interior pressure signal from at least one interior pressure sensor and at least one exterior pressure signal from at least one exterior pressure sensor, where at least one of the at least one interior pressure signal and the at least one exterior pressure signal are received wirelessly. The system determines an interior pressure value based on the at least one interior pressure signal and an exterior pressure value based on the at least one exterior pressure signal. The system calculates the building pressurization based on a difference between the interior pressure value and the exterior pressure value.

An electro-mechanical miniaturized device for pressure measurements is described, the device comprising at least one first electro-mechanical miniaturized pressure sensor member, configured to detect a respective first pressure value P1 and to generate a first electrical signal S1 representative of the first pressure value P1, and further comprising at least one second electro-mechanical miniaturized pressure sensor member, configured to detect a respective second pressure value P2 and to generate a second electrical signal S2 representative of said second pressure value P2. The second sensor member is arranged within a casing suitable to seal it. The device further comprises electronic processing means, operatively connected to the first and the second sensor members, and configured to determine a measured pressure value P based on said first S1 and second S2 electrical signals.

A pressure measurement device comprising a pressure sensor of a first type and a pressure sensor of a second type different from the first, which sensors are mounted on a common support in order to be subjected to the same pressure, in which the pressure sensor of the first type is of the capacitive type, the device being characterized in that the pressure sensor of the first type comprises at least one membrane and a first internal channel passing through the common support, a second internal channel bringing a fluid to the membrane being in fluid flow connection with the first internal channel. A calibration method associated with the device.

A respiratory apparatus evaluates accuracy of a pressure sensor, such as when only a single pressure sensor is provided. The accuracy of the pressure sensor may be assessed based on pressure measurement obtained from the pressure sensor and a subordinate or secondary characteristic of the respiratory device such as altitude or atmospheric pressure. A controller or processor may calculate the altitude of the respiratory device based in part on the pressure measurement. In some embodiments, the assessment of the pressure sensor may involve an evaluation of the calculated altitude. In some cases, the assessment of the pressure sensor may involve determining an estimated pressure based on a calculated altitude, and comparing the pressure measurement obtained from the pressure sensor with the estimated pressure.

Fiber-optic equipment is often deployed in various locations, and performance of fiber-optic transmissions may be monitored as a gauge of equipment status to prevent costly and inconvenient communication outages. Events that damage equipment that eventually result in outage and may be desirable to address proactively, but the occurrence of such events may be difficult to detect only through equipment performance. Presented herein are techniques for monitoring and maintaining fiber-optic equipment performance via enclosure sensors that measure physical properties within a fiber-optic equipment enclosure, such as temperature, pressure, light, motion, vibration, and moisture, which are often diagnostic and predictive of causes of eventual communication outages, such as temperature-induced cable loss (TICL), incomplete flash-testing during installation, exposure to hazardous environmental conditions, and tampering. An enclosure sensor package transmits the physical measurements to a monitoring station, and automatic determination of enclosure-related events may enable triaging and transmission of repair alerts to maintenance personnel.