Operator presence system with bypass logic
First Claim
1. A backhoe having a plurality of actuators having positions for positioning of a digging bucket of the backhoe, an operator station having a first position of an operator and a second position of the operator, and a control system configured for controlling position of the bucket in response to bucket position commands, the control system including:
- a plurality of manual operator input devices located at the operator'"'"'s station for providing the bucket position commands;
a first operator presence sensor associated with the first operator position configured to sense operator presence in the first operator position; and
a second operator presence sensor associated with the second operator position configured to sense operator presence in the second operator position.
3 Assignments
0 Petitions
Accused Products
Abstract
A work vehicle includes a frame, an excavating apparatus movably secured to the frame, an operator'"'"'s station, and a control system. The excavating apparatus includes a material engaging member and a plurality of actuators having positions for positioning the material engaging member with respect to the frame. The control system controls the positions of the plurality of actuators and thereby the position of the material engaging member. The controls system includes a plurality of manual operator input devices, an operator presence sensor, a control circuit, and an override device. The plurality of manual operator input devices are located at the operator station for providing material engaging member position commands. The operator presence sensor is configured to generate an operator presence signal. The control circuit is configured to receive the operator presence signal, to enable the providing of material engaging member position commands when the operator is disposed at a first operator position and to disable the providing of material engaging member position commands when the operator is away from the first operator position. The override device bypasses the presence sensor and is manually engagable by the operator. The control circuit is configured to enable the providing of material engaging member position commands when the override device is manually engaged.
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Citations
22 Claims
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1. A backhoe having a plurality of actuators having positions for positioning of a digging bucket of the backhoe, an operator station having a first position of an operator and a second position of the operator, and a control system configured for controlling position of the bucket in response to bucket position commands, the control system including:
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a plurality of manual operator input devices located at the operator'"'"'s station for providing the bucket position commands;
a first operator presence sensor associated with the first operator position configured to sense operator presence in the first operator position; and
a second operator presence sensor associated with the second operator position configured to sense operator presence in the second operator position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
a driver circuit associated with the plurality of actuators;
a microprocessor; and
a nonvolatile memory device coupled to the microprocessor and including a program;
whereinthe microprocessor is configured by the program to communicate with the driver circuit, the memory device, the first operator presence sensor, and the second operator presence sensor to enable and disable response of the control circuit to the second operator presence sensor.
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8. A work vehicle comprising:
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a frame;
an excavating apparatus movably secured to the frame, including a material engaging member and a plurality of actuators having positions for positioning the material engaging member with respect to the frame;
an operator'"'"'s station; and
a control system for controlling the positions of the plurality of actuators and thereby the position of the material engaging member, the control system including;
a plurality of manual operator input devices located at the operator'"'"'s station for providing material engaging member position commands;
an operator presence sensor configured to generate an operator presence signal;
a control circuit configured to receive the operator presence signal, to enable the providing of material engaging member position commands when the operator is disposed in a first operator position and to disable the providing of material engaging member position commands when the operator is away from the first operator position; and
an override device for bypassing the presence sensor, the override device being manually engageable by the operator, wherein the control circuit is configured to enable the providing of material engaging member position commands when the override device is manually engaged. - View Dependent Claims (9, 10, 11, 12, 13, 14)
a driver circuit associated with the plurality of actuators;
a microprocessor; and
a nonvolatile memory device coupled to the microprocessor and including a program;
whereinthe microprocessor is configured by the program to communicate with the driver circuit, the memory device, the presence sensor and the override device to enable and disable response of the control circuit to the override device.
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15. A control system for positioning a material engaging member of a material excavating apparatus associated with a work vehicle, the work vehicle having an operator'"'"'s station and a seat associated with the operator'"'"'s station, the excavating apparatus movably secured to a frame of the work vehicle, the excavating apparatus including a plurality of actuators having positions for positioning the material engaging member with respect to the frame, the control system comprising:
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a plurality of manual operator input devices located at the operator'"'"'s station for providing material engaging member position commands;
an operator presence sensor associated with the seat, configured to generate an operator presence signal;
a control circuit configured to receive the operator presence signal, to enable the providing of material engaging member position commands when the operator is disposed in a first operator position and to disable the providing of material engaging member position commands when the operator is disposed away from the first operator position; and
an override device for bypassing the presence sensor, the override device being manually engageable by the operator, wherein the control circuit is configured to enable the providing of material engaging member position commands when the override device is manually engaged. - View Dependent Claims (16, 17, 18, 19, 20, 21)
a driver circuit associated with the plurality of actuators;
a microprocessor; and
a memory device coupled to the microprocessor and including a program;
whereinthe microprocessor is configured by the program to communicate with the driver circuit, the memory device, the presence sensor and the override device, and the program is configured to enable and disable response of the control circuit to the override device.
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22. A method of overriding a disablement system for an implement attached to a work vehicle, the work vehicle including an implement control system having operator input devices for operator inputs and configured to disable the implement in the absence of a signal indicative of operator presence provided by an operator presence sensor, and an operator'"'"'s station having an operator'"'"'s seat in the region of the operator input devices, the method including the steps of:
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a. sitting in the seat to provide the signal indicative of operator presence;
b. engaging a manual override device associated with the operator input devices after the step of sitting; and
c. maintaining engagement of the manual override device while rising from the seat to override the disablement system after the step of engaging.
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Specification