Speed sensing device
First Claim
Patent Images
1. A speed sensing device adapted to attach to a hydrostatic motor, said hydrostatic motor being a hydraulic motor connectable to a hydraulic pump in a high-pressure circuit and having a motor housing, comprising:
- a sensor housing attachable to the motor housing of the hydrostatic motor;
a sensor coupled to the sensor housing for sensing the rotational speed, including angular velocity and direction, of the hydrostatic motor;
a microprocessor disposed within said sensor housing and connected to the sensor for receiving and processing the sensed rotational speed of the hydrostatic motor; and
a connector coupled to the sensor housing for connecting the microprocessor to an external device to send and receive signals from the external device.
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Abstract
A speed sensor for sensing the speed and direction of a hydrostatic motor or pump measures the speed, monitors an operator input, processes this information and generates a high power output to drive a solenoid valve or electrical displacement control. The sensor is housed in a single package mounted directly on the hydrostatic motor or pump. The function of the sensor can be easily modified with software changes.
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Citations
17 Claims
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1. A speed sensing device adapted to attach to a hydrostatic motor, said hydrostatic motor being a hydraulic motor connectable to a hydraulic pump in a high-pressure circuit and having a motor housing, comprising:
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a sensor housing attachable to the motor housing of the hydrostatic motor; a sensor coupled to the sensor housing for sensing the rotational speed, including angular velocity and direction, of the hydrostatic motor; a microprocessor disposed within said sensor housing and connected to the sensor for receiving and processing the sensed rotational speed of the hydrostatic motor; and a connector coupled to the sensor housing for connecting the microprocessor to an external device to send and receive signals from the external device. - View Dependent Claims (3, 4, 5, 6, 12, 13, 14)
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2. A switching device adapted to attach to a hydrostatic motor having a swashplate for controlling the operation of the hydrostatic motor depending on the angle of the swashplate, said hydrostatic motor being a hydraulic motor connectable to a hydraulic pump in a high-pressure circuit, the switching device comprising:
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a sensor housing coupled to the hydrostatic motor; a sensor coupled to the sensor housing for sensing the rotational speed, including angular velocity and direction, of the hydrostatic motor;
a microprocessor disposed within said sensor housing and connected to the sensor for receiving and processing the sensed rotational speed and direction of the hydrostatic device and for generating a control signal based on the sensed rotational speed and direction of the hydrostatic motor;a connector coupled to the sensor housing for connecting the microprocessor to the hydrostatic motor to send the control signal to the hydrostatic motor; and wherein said control signal controls the angle of the hydrostatic motor swashplate.
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7. A speed sensing device adapted to attach to a hydrostatic pump, said hydrostatic pump being a hydraulic pump connectable to a hydraulic motor in a high-pressure circuit, comprising:
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a housing attachable to the hydrostatic pump; a sensor coupled to the housing for sensing the rotational speed, including angular velocity and direction, of the hydrostatic pump a microprocessor disposed within said housing and connected to the sensor for receiving and processing the sensed rotational speed of the hydrostatic pump; and a connector coupled to the housing for connecting the microprocessor to an external device to send and receive signals from the external device. - View Dependent Claims (8, 9, 10, 11, 15, 16, 17)
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Specification