Inclination-measuring device
View Patent ↗An inclination-measuring apparatus for use with a motor vehicle includes a rotary sensor connected to the motor vehicle, the rotary sensor selected from one of a rotary position sensor and a rotary angle sensor, a pendulum and a controller. The pendulum has a pendulous mass being oriented to hang substantially aligned with the earth's gravitational forces. The movement of the pendulum providing an input to the rotary sensor to generate a signal to ascertain the inclination of the vehicle relative to the earth's gravitational forces. The signal is processed by the controller that is operatively connected to control one of an electric park brake, a chassis leveling device while parked, a lateral inclination device while the vehicle is operational and a longitudinal inclination device while the vehicle is operational.
1. A parking brake apparatus for use with a vehicle, the apparatus comprising, in combination;
a non-contacting, rotary, hall effect sensor;
a pendulum member pivotally mounted adjacent to the hall effect sensor, the pendulum member having a pendulous mass and a portion forming an aperture, the hall effect sensor disposed in the aperture of the pendulum member;
a magnet member disposed in the aperture of the pendulum member so that the magnet member can activate the hall effect sensor when the pendulum member is angularly displaced to generate an inclination signal that varies with the inclination of the pendulum member;
a controller coupled to the sensor to process the inclination signal; and
a parking brake having an actuator to set the parking brake, the controller coupled to the actuator for sending a brake setting signal to the actuator that is related to the inclination signal.
2. The parking brake apparatus of claim 1 , wherein the controller controls the actuator when a vehicle is stationary to set the parking brake at a predetermined brake force that is based on vehicle inclination, with more brake force the greater an inclination so as to hold a vehicle without moving.
3. The parking brake apparatus of claim 1 , wherein the parking brake further includes a cable, at least one brake caliper connected to the cable, the actuator connected to the brake caliper to set the parking brake, and a cable tension device, the cable tension device measuring the tension force in the cable when the parking brake is being set, the controller coupled to the actuator for sending a brake setting signal to the cable actuator to set the parking brake with a force that is related to the inclination signal with more brake force being applied for a greater inclination.
4. An inclination measuring apparatus for use with a vehicle, the apparatus comprising, in combination:
a housing;
a pendulum member pivotally disposed in the housing, the pendulum member having a pendulous mass and a portion forming an aperture;
a non-contracting, rotary, hall effect sensor disposed in the aperture of the pendulum member;
a magnet member disposed in the aperture of the pendulum member so that the magnetic member can activate the hall effect sensor when the pendulum member is angularly displaced to generate an inclination signal that varies with the inclination of the pendulum member; and
a controller coupled to the hall effect sensor to process the inclination signals.
5. The inclination measuring apparatus of claim 4 , wherein the pendulum member is supported by a pivot shaft, and the pivot shaft is axially aligned with the aperture.
6. The inclination measuring apparatus of claim 5 , further including a bearing supported by the housing, and wherein the pivot shaft is supported by the bearing.
7. The inclination measuring apparatus of claim 4 , wherein the pendulum member is made of non-magnetic material.
8. The inclination measuring apparatus of claim 4 , further including a flux concentrator disposed in the aperture and connected to the pendulum member, a printed circuit board disposed in the housing and fastened to the hall effect sensor, a pivot shaft, wherein the pendulum member is supported by the pivot shaft, the pivot shaft is axially aligned with the aperture, the magnet member is secured in the aperture of the pendulum and the hall effect sensor is aligned with a central axis of the pivot shaft.
9. The inclination measuring apparatus of claim 4 , wherein the magnet member includes a ring magnet with an outer diameter that engages an inner diameter of the aperture.
10. The inclination measuring apparatus of claim 4 , wherein the apparatus further includes a flux concentrator disposed in the aperture and connected to the pendulum member.
11. The inclination measuring apparatus of claim 4 , wherein the pendulum member is supported by a pivot shaft, and the hall effect sensor is aligned with a central axis of the pivot shaft.
12. The inclination measuring apparatus of claim 4 , further including a printed circuit board disposed in the housing and fastened to the hall effect sensor.
13. The inclination measuring apparatus of claim 4 , further including a liquid dampening material, wherein the housing has a portion forming a cavity for the pendulous mass and the liquid dampening material is disposed in the cavity about the pendulous mass.
14. The inclination measuring apparatus of claim 4 , wherein the controller processes a signal from the hall effect sensor to activate a parking brake.
15. The inclination measuring apparatus of claim 4 , wherein the controller processes a signal from the hall effect sensor for controlling a vehicle-leveling device.