Abstract:
PROBLEM TO BE SOLVED: To provide a method of measuring riding comfort of a road, which is more effective and timely.SOLUTION: A virtual profile graph is disclosed, which can provide a measurement result indicating the riding comfort of a road as the road is being constructed. As a result, a more timely and less costly indication of the riding comfort of the road is obtained as compared to prior methods. In a first embodiment, an antenna of Global Navigation Satellite System is attached to a vehicle. When the vehicle travels over the road, a measurement value of the position of the antenna is recorded at different times. The profile of the road is created by measuring the elevation of the antenna as a function of the distance traveled from a starting point. In another embodiment, a tilt sensor is used to measure the slope of the road and the tilt of the vehicle. By this, the precise orientation of the vehicle, and consequently, the contours of the road can be determined.
Abstract:
PROBLEM TO BE SOLVED: To provide an earthmoving machine including a control system. SOLUTION: The machine is provided with a first and second satellite antennas installed in the longitudinal direction on the machine. A third satellite navigation antenna is attached to a pole installed on an operation element of the earthmoving machine. In one embodiment, the earthmoving machine is a bulldozer, and the operation element is a blade of the bulldozer. The machine further includes a gravity reference sensor and a plurality of gyroscopes installed on the machine. A computer processor produces a control signal on the basis of data received from various component parts. On the basis of the system and the method disclosed, the earthmoving machine can perform dynamically stable operation at a relatively high speed without developing undesired vibrations. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for processing signals in a satellite/laser positioning system capable of generating location coordinates from received satellite signals and a received laser signal. SOLUTION: A height coordinate bias value is maintained by a filter processor during periods when the laser signal is available. The height coordinate bias value represents an estimated difference between a satellite signal derived height coordinate and a laser signal derived height coordinate. During periods when the laser signal is available, the laser signal derived height coordinate is output. During periods when the laser signal is not available, a corrected height coordinate value is generated by applying the height coordinate bias value to the satellite signal derived height coordinate. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of measuring the riding comfort of a road which is more effective and timely. SOLUTION: A virtual profile graph has been disclosed which can provide a measurement result indicating the riding comfort of the road while constructing the road. As a result, an indicator of the riding comfort of the road has been obtained which is more timely and inexpensive than a traditional method. In the first execution pattern, an antenna of the GNSS is mounted on a vehicle. While the vehicle is travelling on the road, a measurement value of an antenna position is recorded at different time. The profile of the road is created by measuring the height of the antenna as a function of distance traveled from a start point. In other execution patterns, an inclination sensor is used for the measurement of the slope of the road and the inclination of the vehicle. By this, the precise orientation of the vehicle, consequently, the outline of the road can be determined. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for generating a three dimensional terrain map of a geographic area. SOLUTION: A mobile unit is equipped with a satellite receiver (e.g., a GPS receiver 302) for generating location data. A map generator (404) uses the location data (402) to generate a three dimensional terrain map (406). In one embodiment, the mobile unit has primary uses other than mapping, and is traversing the geographic area to be mapped in connection with their primary function. The map generation process may be performed iteratively over time, as additional location data becomes available. During a time period when location data is unavailable for a portion of the three dimensional terrain map, the map generator may estimate the missing portion of the map using the available data. The estimated portion may later be updated with actual data as that data becomes available. The map may also contain enhancements based on enhancement data received by the map generator. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an improved machinery control method and a controller for guaranteeing the dynamic stabilization of machinery (for example, a bulldozer) in operation with a relatively high speed. SOLUTION: A ground leveling machine is provided with first and second satellite antennas 104 and 106 installed thereon in the longitudinal direction. A third satellite navigation antenna 108 is installed on a column 110 attached to a movable component of the ground leveling machine. According to an embodiment of this invention, the ground leveling machine refers to a bulldozer 102 and the movable component its blade 112. The machine is also equipped with a gravity reference sensor and a plurality of gyroscopes installed thereon. A computer processor generates machine control signals in accordance with the sensor data received from various components of the machine. The system and method disclosed by the invention allow the dynamic stabilization of ground leveling machine during its operation with a relatively fast speed without developing undesired vibrations. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
An apparatus includes an antenna, RF path, Analog to Digital converter (ADC), filter, and navigation channel for processing a received GNSS signal based on a navigation clock. A communication modem is configured to receive the signal via a first antenna, RF path, and ADC and process the received signal in order to generate a signal based on a modem clock. The communication modem is further configured to transmit the signal based on the modem clock using a R+1 antenna via a R+1 RF path and a Digital to Analog Converter (DAC). A multichannel synchronous signal analysis system (MSSAS) receives outputs of the ADCs and processes them using a plurality of decimators and plurality data receivers. Each of the decimators is configured to process the outputs of the ADCs and output data to one of a plurality of data receivers. A CPU is configured to control all of the devices.
Abstract:
An apparatus for forming wideband pseudo random noise signals includes a set of channels each comprising an NCO having a controlled frequency and phase and a PRN code generator, the NCO generating a strobe that is output to the PRN code generator. The PRN code generator forms a new sequence element of +1 or -1 in response to the strobe. The apparatus also comprises a first modulator having a plurality of weight coefficients, a plurality of multipliers each multiplying one of the weight coefficients, an adder outputting a sum of the plurality of multipliers output signals, and a mixer with a quadrature output signal multiplying the adder's output by sine and cosine of a low intermediate frequency. The apparatus also includes a processor controlling the set of channels, a transceiver module to receive and/or transmit quadrature signals, and an interface connecting the output of the mixer and the transceiver module.
Abstract:
A method for the application of agricultural fluid to a field includes determining a location of each of a plurality of nozzles of an agricultural spraying machine. A flow rate for each of the nozzles is determined based on each respective nozzle's location in the field. A field map is used to determine a crop requirement and application restriction associated with a nozzle's location. The field map contains indications of crop requirements and application restrictions. The flow rate for a nozzle is determined by comparing the nozzle's location to the field map. A flow rate signal is transmitted to each of the nozzles based on its determined flow rate.