摘要:
A dynamic payload monitor measures and displays payload weight for a loader vehicle operated on a slope by sensing the hydraulic pressure and position of the lift arm cylinders. The payload weight is computed by curve fitting the sensed cylinder pressure and position data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. Payload weight is corrected for errors caused by operating the loader vehicle on a slope. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.
摘要:
In many applications, it is important to measure and display payload weight for a loader vehicle. The subject apparatus and method senses only the hydraulic pressure of a lift cylinder. The payload weight is computed by curve fitting the sensed cylinder pressure to a second order time dependent polynomial and comparing the time dependent polynomial to one of a series of predetermined second order geometric polynomials. The weight computation algorithms used in the payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.
摘要:
A dynamic payload monitor measures and displays payload weight for a loader vehicle during tip loading by sensing the hydraulic pressure of the lift and tilt cylinders and the geometry of an implement linkage. The payload weight is computed by curve fitting the sensed lift cylinder pressure and geometry data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. Tilt cylinder curves are derived by curve fitting tilt cylinder pressure and lift cylinder geometry data to a third order polynomial. The tilt cylinder curves are then compared to a plurality of tabulated tilt cylinder curves. Tip loading conditions are detected and the computed payload weight is modified in response to the magnitude of the tilt cylinder pressure. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least two hydraulic cylinders for modifying the linkage geometry.
摘要:
A dynamic payload monitor measures and displays payload weight for a loader vehicle by sensing the hydraulic pressure and position of the lift arm cylinders. The payload weight is computed by curve fitting the sensed cylinder pressure and position data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.
摘要:
A device for detecting undesirable vibrations in a vehicle drive line utilizes a sensor that communicates with a controller to indicate undesirable vibrations in a drive line component. In one example, a temperature sensor is placed in a central portion of a universal joint. The temperature sensor preferably is supported within a single housing along with a transmitter that is responsive to the temperature sensor to transmit a signal to a remotely located receiver without using a hardwire connection between the transmitter and receiver. Packaging the temperature sensor, transmitter and a power source within a single housing provides the ability to seal off or close a series of lubrication channels that extend through the universal joint. In another example, a contact-based sensor provides a signal whenever a vibration of a drive line component occurs. The contact-based sensor signal preferably is processed to monitor the number of vibrations over time and a vehicle operator is provided with an indication of the level of vibrations as desired.
摘要:
A system and method for controlling the navigation of surface based vehicle uses a route that is obtained by manually driving the vehicle over the route to collect data defining the absolute position of the vehicle at various positions along the route. The collected data is smoothed to provide a consistent route to be followed. The smoothed data is subsequently used to automatically guide the vehicle over the route.
摘要:
A method to estimate the thickness of a brake lining based on the periodic sampling of the output of a temperature sensor embedded in the brake lining. A temperature histogram is created which is compared to calibration histograms stored in an electronic processing unit to yield an estimated brake lining thickness which is transmitted to the vehicle cab or to another on-board electronics unit. A brake wear factor is calculated from the temperature histogram by multiplying the average value of each temperature range by the frequency of occurrence and then summing the results.
摘要:
An apparatus and method for controlling a surface-based vehicle provides three operational modes: a manual operation, a tele-operation, and an autonomous operation. In manual operation, an operator directly manipulates vehicle controls on the vehicle. In tele-operation, the operator controls the vehicle from a remote position. In autonomous operation, the vehicle controls itself based on its position and a predetermined path. The apparatus and method of the present invention provides an orderly transition between manual operation, tele-operation, and autonomous operation of the vehicle.
摘要:
The position of a satellite in a satellite based navigation system is determined without reliance on satellite ephemeris data. Orbital parameters are computed for each satellite. The orbital parameters can then be used to predict the position of each satellite at any time. Subsequent ephemeris data may be compared to a predicted satellite position to determine whether the ephemeris data is corrupt. The orbital parameters may be determined by: computing a pseudorange and a velocity for a selected satellite for a plurality of times, computing at least three estimated positions of the satellite from the pseudoranges and velocities, and computing orbital parameters for the satellite from the three estimated positions. In another embodiment, the orbital parameters are determined by: determining the position of a receiver for at least three times using a constellation of satellites, using the three receiver positions to triangulate on an average position for the selected satellite in the constellation, repeating these steps until at least three mean satellite positions have been computed, computing the orbital parameters from the three mean positions of the selected satellite.
摘要:
A sensor system includes a housing that houses a thermally sensitive sensor, a transmitter portion and a power source. Preferably, the sensor device is encapsulated to protect the components from the environment. The transmitter generates a signal in response to the sensor detecting a temperature in a vehicle component that exceeds a predetermined temperature. A receiver is located remotely from the transmitter to receive the signal. The power supply generates electricity when the temperature of the vehicle component achieves an initial threshold temperature that is less than the predetermined temperature.