The present invention relates generally to a tire pressure and temperature measuring system. More specifically, the system is comprised of an ergonomic and durable tire pressure and temperature gauge that does not require any external buttons, displays, or indicia, and that is capable of measuring the internal pressure and air temperature of a tire. The system is further comprised of an accompanying mobile application or computer-based software program that allows the collected pressure and/or temperature data to be wirelessly transmitted and formatted into a report that is accessible via a user interface on a remote device. The system is also capable of making recommendations to the user based on the collected pressure and/or temperature data.

A method for calibrating a radial acceleration sensor of a wheel of a vehicle including the following steps: acquisition, by the sensor, of signals S.sub.i, each signal S.sub.i being acquired during a predetermined time window W.sub.i when the vehicle is in motion, the windows W.sub.i being different from one another; detection, for each time window W.sub.i, of local extrema of the signal S.sub.i associated respectively with phase values and detection instants; determination, for each time window W.sub.i, of a frequency F.sub.i of the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected; low-pass filtering of the signals S.sub.i, so as to obtain, for each time window W.sub.i, a filtered value Z.sub.i; calibration of a constant error E.sub.c of the radial acceleration sensor as a function of the filtered values Z.sub.i and of the frequencies F.sub.i.

A method for calibrating a radial acceleration sensor of a wheel of a vehicle including the following steps: acquisition, by the sensor, of signals S.sub.i, each signal S.sub.i being acquired during a predetermined time window W.sub.i when the vehicle is in motion, the windows W.sub.i being different from one another; detection, for each time window W.sub.i, of local extrema of the signal S.sub.i associated respectively with phase values and detection instants; determination, for each time window W.sub.i, of a frequency F.sub.i of the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected; low-pass filtering of the signals S.sub.i, so as to obtain, for each time window W.sub.i, a filtered value Z.sub.i; calibration of a constant error E.sub.c of the radial acceleration sensor as a function of the filtered values Z.sub.i and of the frequencies F.sub.i.

A flexible sensor for monitoring operating parameters, including pressure and temperature, of a flexible structure, such as a tire, provides electrodes and an active area that are formed of flexible materials. In particular, the active area may be formed from an elastomeric piezoresistive material, such as an ionic liquid-polymer. The flexible properties of the sensor allow it to be readily incorporated into the body of a tire during manufacture. This allows the operating parameters of the tire to be monitored, such as in real-time, while the tire is in operation. Furthermore, the sensor is formed of materials that allow the sensor to be formed using additive manufacturing techniques, such as 3D (three-dimensional) printing. As such, the sensor may be 3D printed together with another structure, such as a tire tread, so that the sensor is integrated therein.

Aspects of the present disclosure are generally related to one or more systems, methods, and devices for providing an integrated tire inflation system, mounted on each tire, wheel, rim, axle, or structure of the vehicle, that communicates with a remote device (e.g., communication device located in the cab of the vehicle and/or a remote network entity) and obtains an optimal tire pressure from the network entity that is calculated to maximize fuel economy, tread life, load, or an environmental condition. In some examples, the integrated telematics system may periodically measure and transmit data associated with the tire to the communication device in the cab and/or to a network entity that may calculate the optimal tire pressure for each tire on the vehicle. The integrated telematics system may receive the optimal tire pressure information from the communication device and/or the network entity and automatically adjust the tire pressure accordingly.

A method for testing a punctured tyre's resistance to a loss in pressure includes: creating a plurality of punctures in a wall of the tyre by inserting a plurality of puncturing objects through the wall; running the tyre with the puncturing objects in the wall thereof over a given distance with a regulated inflation pressure; stopping the running of the tyre; and determining, for each puncture, a pressure loss resistance index based on an estimate of a leak rate of the puncture.

A method for testing a punctured tyre's resistance to a loss in pressure includes: creating a plurality of punctures in a wall of the tyre by inserting a plurality of puncturing objects through the wall; running the tyre with the puncturing objects in the wall thereof over a given distance with a regulated inflation pressure; stopping the running of the tyre; and determining, for each puncture, a pressure loss resistance index based on an estimate of a leak rate of the puncture.

A charge potential distributed over a vehicle body resulting from the contact, separation, and friction between a tire and a road surface is detected by a detecting unit provided with a sensing electrode that is disposed on the external surface of the vehicle body, a reference electrode that is disposed apart from the external surface of the vehicle body with a space therebetween, and a sensor amplifier that senses a potential between the sensing electrode and the reference electrode as a signal and amplifies the signal. And the amplitude of the charge potential detected by the detecting unit is monitored by a data processing unit, thereby making it possible to accurately identify not only the state of the road surface but also an internal pressure state of the tire, a wear state of the tire, and the like during vehicular travel.

A charge potential distributed over a vehicle body resulting from the contact, separation, and friction between a tire and a road surface is detected by a detecting unit provided with a sensing electrode that is disposed on the external surface of the vehicle body, a reference electrode that is disposed apart from the external surface of the vehicle body with a space therebetween, and a sensor amplifier that senses a potential between the sensing electrode and the reference electrode as a signal and amplifies the signal. And the amplitude of the charge potential detected by the detecting unit is monitored by a data processing unit, thereby making it possible to accurately identify not only the state of the road surface but also an internal pressure state of the tire, a wear state of the tire, and the like during vehicular travel.

The present invention provides an inflatable paddle board including an inflatable paddle board body, an air pressure detection device, and an air pressure display device, where the air pressure detection device is configured to detect air pressure in an air chamber of the inflatable paddle board body and transmit detected air pressure information; and the air pressure display device is configured to receive and display the air pressure information. The inflatable paddle board provided by the present invention enables a user to know the air pressure of the inflatable paddle board at any time, so that the abnormal situation of the air pressure of the inflatable paddle board can be found in time and a response can be made, and the inflatable paddle board has high safety.