Abstract:
A method for operating a device for monitoring and indicating a pressure change in vehicle tires by wire, being preferably arranged in the tire as one module together with the tire valve, and comprising a current source, a pressure sensor arranged for measuring the tire pressure at first time intervals, an analog/digital converter for digitizing a pressure signal obtained from the pressure sensor, a memory for storing the pressure signal, a transmitter for transmitting the measured tire pressure information to a receiving unit located in the vehicle, a comparator, especially one realized in one module with a microprocessor, which compares the pressure signal with a previously stored comparison pressure signal and controls the transmitter in such a way that the transmitter will transmit signals at second time intervals greater than the first time intervals, so long as the decrease of the pressure signal, relative to the comparison pressure signal (drift), does not exceed a threshold value, but will transmit signals at third time intervals smaller than the second time intervals when and so long as the drift exceeds the pressure threshold value; to this end the second time intervals are varied in response to one or more physical conditions that are measured in the tire and that vary in driving operation.
Abstract:
A tire auto-location system for a tire pressure monitor sensor and operating method thereof are provided. The tire auto-location system for a tire pressure monitor sensor includes a host, a plurality of axle rotation detection devices, and a plurality of tire pressure monitor sensors. By allowing the host to receive and compare the corresponding gear ring rotation data transmitted by the plurality of axle rotation detection devices and the corresponding tire rotation data transmitted by the plurality of tire pressure monitor sensors, the location of each tire pressure monitor sensor can be confirmed. At the same time, since the host and the tire pressure monitor sensor have two-way transmission functions, the host can react quickly and promptly command the tire pressure monitor sensor to stop sensing and transmitting after completing the calculation.
Abstract:
An electronic wheel unit for arrangement on a vehicle wheel of a vehicle, having at least one sensor for detecting at least one wheel operational parameter, a control device, which is designed to generate wheel operational data on the basis of the at least one wheel operational parameter, a radio device for transmitting radio data signals containing the wheel operational data, a power supply device for supplying electrical power to the wheel unit which has an energy-harvesting device for converting mechanical energy captured on a rotation of the vehicle wheel into electrical energy and an electric battery, wherein the electronic wheel unit furthermore has a switchover device for switching over between the energy-harvesting device, and the electric battery for the electrical power supply to the wheel unit, and the switchover device has an actuable switch and an actuating device for actuating the switch, wherein the at least one wheel operational parameter comprises an acceleration parameter, and the actuating device effects the switchover depending on the acceleration parameter or a parameter derived therefrom.
A movement sensor and/or a proximity sensor; A microprocessor coupled to the sensor to form a data signal; A storage area connected to the microprocessor for storing a part of the data signal and an identification information element; An energy source; and A radio transmitter connected to the microprocessor;
characterized in that the microprocessor is capable of defining two states of the electronic member, the storage area contains a predetermined change of state which is defined on the basis of the two states, the microprocessor is capable, having detected the predetermined change of state, of transmitting the identification information element via a radiofrequency signal transmitted during a time interval ΔT and then stopping the transmission of the radiofrequency signal at the end of said time interval ΔT and the time interval ΔT is between 20 seconds and 10 minutes.
Abstract:
A tire pressure detection apparatus includes: a transmitter at each of a plurality of wheels with a tire; and a receiver at a vehicle body. The transmitter has: a sensing device having a pressure sensor outputting a detection signal related to a tire pressure of each of the plurality of wheels and an acceleration sensor detecting an acceleration including a centrifugal acceleration caused by rotation of the wheel and a gravitational acceleration; a first controller performing signal processing on the detection signal of the pressure sensor and creating a frame storing data related to the tire pressure; and a radio wave transmitter transmitting the frame. The receiver has: a radio wave receiver receiving the frame; and a second controller detecting a tire pressure based on the data related to the tire pressure stored in the received frame.
Abstract:
A first tire pressure sensor module is configured to provide information related to a pressure of a tire of a vehicle and comprises a pressure sensor configured to determine the information related to the pressure of the tire. The pressure module further includes a controller configured to selectively operate the tire pressure sensor module in an active state and in an inactive state, wherein an energy consumption of the tire pressure sensor module is lower in the inactive state than in the active state. The controller is further configured to control an output of the information related to the pressure of the tire in the active state, and operate the tire pressure sensor module in the inactive state based on determining that information related to a velocity of the tire indicates a velocity above a threshold.
Abstract:
An apparatus for determining a driving situation of a vehicle to be monitored is disclosed. The apparatus comprises a provider configured to provide measurement values, wherein the provider is configured to obtain the measurement values at non-equidistant sampling instants, wherein the measurement values comprise information relating to the driving situation of the vehicle to be monitored. The apparatus further comprises an evaluator configured to evaluate a plurality of the measurement values with respect to a measure indicating a temporal variation of the plurality of measurement values.
Abstract:
A tire pressure sensor device (122) for a wheel (112) of an aircraft (102) including a pressure sensor (124) for measuring the internal pressure of a tire, a temperature sensor (126) for measuring a temperature local to the tire (116), a memory unit (131) local to the tire for storing data, and a control unit (128) local to the tire arranged to record in the memory unit (131) data of the readings taken at intervals of time. The data recorded for each reading includes an indication of the time of the reading, the tire pressure and the temperature local to the tire. Measurements may be taken and recorded over time, both when the aircraft is on the ground and when the aircraft is in flight. Data may be uploaded to a portable handheld device (140) for analysis when maintaining the tires in their correctly inflated state.
Abstract:
Method for transmitting a radio signal between a moving electronics unit of a wheel and a fixed central electronic control unit of the vehicle, includes: defining an angular reference point of the wheel; defining a division of one wheel revolution into successive basic sectors, and transmitting successive radio signals between the two units so that each signal is transmitted at a calculated predetermined wheel angular position; calculating the angular rotation speed of the wheel; determining a minimum wheel rotation sector required for the transmission time of a signal between the two units, at the calculated angular rotation speed; determining an angular offset of transmission between a first and a second following signal, with respect to the angular reference point, as being equal to the smallest multiple of the basic division sector which covers the time required for transmission of the first radio signal at the calculated angular rotation speed.
Abstract:
A monitoring system includes sensors, clocks, global positioning systems (GPS) receiver, display screens and a controller circuitry. The controller circuitry is configured to analyze the collected signals, the time information, and the route information to identify at least one trigger factor based on a tire characteristic; determine whether the identified at least one triggering factor exceeds an triggering threshold based on the collected signals and information; derive when the identified triggering factor exceeds the triggering threshold, an triggering priority indicating an order in which the triggering factors are processed based on the collected signals and route information; trigger a tire monitoring procedure based on the collected information, the triggering threshold and the triggering priority; and display at the display screen, results of the tire monitoring procedure to provide a visual indication of the tire characteristic that caused the triggers factor to exceed the triggering threshold.