Provided is a measuring device capable of enhancing convenience. The measuring device 1 comprises a first sensor 2 provided on a surface of an object 11 to be measured, an elastic body 3 that clamps the first sensor 2 between the elastic body 3 and the object 11 to be measured, a protective sheet 4 provided on the surface of the elastic body 3 on the side of the object 11 to be measured, a case 5 provided on the surface of the elastic body 3 on a side opposite from the object 11 to be measured, and a processing circuit 8 which is provided inside the case 5 and processes an output signal from the first sensor 2. The first sensor 2 is provided between the elastic body 3 and the protective sheet 4. The first sensor 2 is a strain sensor and includes a thin film piezoelectric element. The elastic body 3 is made of foamed rubber.

A hand-held device for measuring tire pressure and temperature including a pressure sensor, a temperature sensor, an optical pointer, a processor responsive to an output of the pressure sensor and the temperature sensor, and a display. The processor is configured to output a value on the display indicative of a measured tire pressure.

The present invention is a system for measuring and displaying the pressure of conventional American-style footballs in real time to game officials and spectators continuously. In one preferred embodiment, at least one pressure transducer device is disposed inside the football. The pressure transducer is an electrical oscillator. The frequency of oscillation is a known mathematical function of the bladder pressure. At least one pressure readout device is positioned externally to the football at the outside of the cover-liner. The pressure readout device wirelessly stimulates the pressure transducer device to oscillate. The pressure readout device reads the frequency of oscillation and calculates the value of the pressure. In another preferred embodiment, the value of the football's pressure is measured by physical contact with a Durometer. Both embodiments display the pressure to game officials locally; and transmit the value of the football's pressure to spectators remotely.

A pressure testing device for calculating a pressure in a flexible line comprises a housing unit, a force sensor mounted on the housing unit and a clamp assembly having a clamp mounted on the housing unit. The clamp is operable to compress the flexible line against the force sensor by a predetermined degree of deformation of the flexible line. The device includes a displacement sensor adapted to measure a displacement of the clamp. The device also includes a controller having a processor in communication with the force sensor and the displacement sensor, and a memory unit containing stored data. At the predetermined degree of deformation of the flexible line, the processor compares a first signal from the force sensor and a second signal from the displacement senor with the stored data to estimate the pressure within the flexible line.

Sensors incorporating piezoresistive materials are described. One class of includes conductive traces formed directly on or otherwise integrated with the piezoresistive material.

A tire valve registration system including: a plurality of tire valves that are respectively installed on a plurality of tires and on a spare tire and that each transmit a radio signal that includes a valve ID and data on tire air pressure; and a receiver that is provided to a vehicle body and that is capable of receiving the radio signal from each of the plurality of tire valves. The system includes: a spare tire ID collecting unit that collects, as at least one spare tire candidate ID, the valve ID of at least one radio signal received by the receiver; and a spare tire ID confirming unit that confirms the ID of the spare tire.

A wireless tire pressure monitoring system and a method for operating the tire pressure monitoring system to locate each wireless tire pressure sensor. The wireless host is connected to the wireless receiver. Each wireless tire pressure sensor sends info to the wireless host and the wireless receiver. The wireless host and the wireless receiver allocate the positions of the wheels where the wireless tire pressure sensors are installed by the info received from wireless tire pressure sensors. The wireless receiver analyses and calculates the received info, and forwards the result to the wireless host to process a cross-comparison to precise allocate the positions of the wireless tire pressure sensors. The method does not need to replace or add new wireless tire pressure sensors, and does not need to obtain new serial numbers. The positions of the wireless tire pressure sensor are precisely allocated by the method of the present invention.

A system for measuring tire pressure and temperature including a pressure sensor, a temperature sensor, a processor responsive to an output of the pressure sensor and the temperature sensor, and a display. The processor is configured to output a value on the display indicative of a measured tire pressure and an indication of measured tire temperature, wherein the indication of measured tire temperature comprises an indication of the result of a comparison between the measured tire temperature and a predetermined temperature value.