A vehicle wheel with monitoring device, and a monitoring device, comprising a housing which is arranged rotatably with a rim part of the vehicle wheel, an electronic circuit which is arranged in the housing and is coupled to a load detection device arranged in the housing and having strain gauges for detecting forces acting on the vehicle wheel. In order to create a monitoring device which is easy to install on different vehicle wheels and which can reliably determine the load forces occurring on the vehicle wheel, the housing has two fastening zones which are spaced apart from one another and which are connected to one another via at least one bending strut connected to both fastening zones as a component of the load detection device, at least one pair of strain gauges being arranged on the bending strut between the fastening zones for detecting the bending of the bending strut caused by load forces.

A method for determining a fluid pressure in a pneumatic bladder of a pneumatic adjusting device of a vehicle seat is disclosed, wherein the pneumatic bladder is connected to a valve for the filling or emptying of the bladder with or of fluid. Fluid start pressure at the valve is provided as initial pressure for determining of the fluid pressure in the bladder. Fluid throughflow through the valve device is determined using a first assignment rule which assigns the fluid throughflow to the fluid start pressure at the valve. The fluid throughflow obtained using the first assignment rule over a predetermined period of time is summed to determine a fluid quantity that has flowed through the valve. Fluid pressure present in the bladder is determined using a second assignment rule which assigns the fluid pressure present in the bladder to the determined fluid quantity.

A method for determining a fluid pressure in a pneumatic bladder of a pneumatic adjusting device of a vehicle seat is disclosed, wherein the pneumatic bladder is connected to a valve for the filling or emptying of the bladder with or of fluid. Fluid start pressure at the valve is provided as initial pressure for determining of the fluid pressure in the bladder. Fluid throughflow through the valve device is determined using a first assignment rule which assigns the fluid throughflow to the fluid start pressure at the valve. The fluid throughflow obtained using the first assignment rule over a predetermined period of time is summed to determine a fluid quantity that has flowed through the valve. Fluid pressure present in the bladder is determined using a second assignment rule which assigns the fluid pressure present in the bladder to the determined fluid quantity.

A pressure reference resetting structure of an inflatable mattress, the inflatable mattress contains a valve connected with an end of the inflatable mattress, an inflatable air pump connected with the valve, and the valve being connected with a pressure detection pipe which is coupled with a pressure sensing element. The valve includes an air orifice communicated with the pressure detection pipe so that the pressure sensing element detects a pressure of an external environment via the pressure detection pipe and the air orifice, and a reference pressure of the inflatable mattress is reset to inflate the inflatable mattress based on the reference pressure.

A pressure reference resetting structure of an inflatable mattress, the inflatable mattress contains a valve connected with an end of the inflatable mattress, an inflatable air pump connected with the valve, and the valve being connected with a pressure detection pipe which is coupled with a pressure sensing element. The valve includes an air orifice communicated with the pressure detection pipe so that the pressure sensing element detects a pressure of an external environment via the pressure detection pipe and the air orifice, and a reference pressure of the inflatable mattress is reset to inflate the inflatable mattress based on the reference pressure.

An analog input device including at least one mounting panel and a matrix of analog push button assemblies mounted thereon. Each analog push button assembly including an analog pressure sensor including a pressure reception arrangement having an optical sensing sub-arrangement configured to measure an amount of light varied according to a pressure sensed at the pressure reception arrangement and an output terminal for outputting an analog signal corresponding to the amount of light measured, and a plunger element configured to exert the pressure on the pressure reception arrangement. The analog input device may include a multiplexer including an input side coupled to the push button assemblies and an output side; an analog-to-digital converter coupled to the output side of the multiplexer; a processor coupled to the analog-to-digital converter and configured to output a data packet; and a communication interface configured to transmit the data packet to a host computing device.

An at least one acoustic sensor in form of a microphone configured for coupling with a tire pressure monitoring system and tire pressure monitoring system unit sensor to generally detect an acoustic signal within a tire interior space generated by a tire as the tire travels across a road surface. The detected signal can be used by various vehicle systems to generally determine a tire condition, such as, but not limited to, tread wear, tread depth, tire health, road condition, road characterization, status of noise reducing foam, and active noise cancelling.

An at least one acoustic sensor in form of a microphone configured for coupling with a tire pressure monitoring system and tire pressure monitoring system unit sensor to generally detect an acoustic signal within a tire interior space generated by a tire as the tire travels across a road surface. The detected signal can be used by various vehicle systems to generally determine a tire condition, such as, but not limited to, tread wear, tread depth, tire health, road condition, road characterization, status of noise reducing foam, and active noise cancelling.

A method of monitoring the pressure of a tire of an aircraft, the method including: taking two or more pressure readings from the tire at different times; calculating an estimated deflation rate based on the pressure readings; and calculating a time for the tire to deflate to a reference pressure level based on the estimated deflation rate. Two or more temperature readings are each associated with one of the pressure readings, and the estimated deflation rate is calculated by normalising each pressure reading based on its associated temperature reading and a common reference temperature to obtain a temperature-normalised pressure reading, and calculating the estimated deflation rate based on the temperature-normalised pressure readings. The estimated deflation rate is compared with a threshold, and a warning provided if the estimated deflation rate exceeds the threshold.

A method of monitoring the pressure of a tire of an aircraft, the method including: taking two or more pressure readings from the tire at different times; calculating an estimated deflation rate based on the pressure readings; and calculating a time for the tire to deflate to a reference pressure level based on the estimated deflation rate. Two or more temperature readings are each associated with one of the pressure readings, and the estimated deflation rate is calculated by normalising each pressure reading based on its associated temperature reading and a common reference temperature to obtain a temperature-normalised pressure reading, and calculating the estimated deflation rate based on the temperature-normalised pressure readings. The estimated deflation rate is compared with a threshold, and a warning provided if the estimated deflation rate exceeds the threshold.