Abstract: A system for evaluating the modulation transfer function (MTF) of a device under test is provided. The system includes an image projector configured to provide light in a pattern representing a desired image. The system further includes a lens configured to direct the provided light toward the device under test as a collimated beam. An image analysis component calculates the MTF for the device under test from the at least one image taken at the device under test and the known characteristics of the image projector and the lens.

Abstract: A method of unlocking a vehicle includes acquiring images of a person approaching the vehicle. A gait and facial features of the person are determined based on the acquired images. The determined gait is matched to a stored gait in a first data set. The determined facial features are matched to stored facial features in a second data set. The vehicle is unlocked if the matched gaits and matched facial features indicate the person is an authorized person.

Abstract: A system for evaluating the modulation transfer function (MTF) of a device under test is provided. The system includes an image projector configured to provide light in a pattern representing a desired image. The system further includes a lens configured to direct the provided light toward the device under test as a collimated beam. An image analysis component calculates the MTF for the device under test from the at least one image taken at the device under test and the known characteristics of the image projector and the lens.

Abstract: An electronic control unit for a vehicle system that includes at least one acceleration sensor and at least one angular rate sensor for generating data concerning motion of the vehicle relative to vehicle reference axes.

Abstract: An inertial sensor includes a single linear accelerometer disposed upon a silicon wafer. The accelerometer is electrically connected to a plurality of signal conditioning circuits that generate an output signals in different ranges. Each signal conditioning circuit has an output that is electrically connected to an associated control device.

Abstract: An inertial sensor includes a single sense element disposed upon a silicon wafer. The sense element is electrically connected to a plurality of signal conditioning circuits that generate output signals in different ranges. Each signal conditioning circuit has an output that is electrically connected to an associated control device.

Abstract: A balanced resonant micro electromechanical system angular rate sensor includes a feedback control loop that generates a null signal to rebalance the sense element to cancel any a Coriolis force induced displacement of the proof mass. The null signal is proportional to the Coriolis force and is used as the sensor output signal. A test signal is injected into the null signal feedback control loop. The resulting sensor output signal is a function of the test signal. If there is no change in the output signal following the injection of the test signal or if the output signal resulting from the test signal exceeds a predetermined threshold, the sensor is defective. Because the test signal is used to cancel the proof mass displacement, the test verifies operation of the sensor element.

Abstract: An electronic control unit for a vehicle system that includes at least one acceleration sensor and at least one angular rate sensor for generating data concerning motion of the vehicle relative to vehicle reference axes.

Abstract: A pressure sensor is mounted integrally in a hydraulic valve body. The sensor has a base which extends into a bore formed in the valve body. The valve body bore is in communication with a pressurized hydraulic fluid. A first circumferential groove formed in the sensor base carries an O-ring which forms a seal between the sensor and the wall of the valve body bore. A second circumferential groove formed in the sensor base carries a spring ring which extends into a corresponding groove formed in the wall of the valve body groove. The spring ring cooperates with the sensor base and valve body bore grooves to retain the sensor in the valve body bore.

Abstract: An inertial sensor includes a plurality of sense elements disposed upon a silicon wafer. Each of the sense elements senses a different inertia range. The sense elements are electrically connected to a common signal conditioning circuit that generates an output signal for each of the sense elements. The signal conditioning circuit has an output that is electrically connected to at least one control system and provides output signals in different ranges to the control system.

Abstract: An inertial sensor includes a plurality of sense elements disposed upon a silicon wafer. Each of the sense elements senses a different inertia range. The sense elements are electrically connected to a common signal conditioning circuit that generates an output signal for each of the sense elements. The signal conditioning circuit has an output that is electrically connected to at least one control system and provides output signals in different ranges to the control system.

Abstract: An inertial sensor includes a plurality of sense elements disposed upon a silicon wafer. Each of the sense elements senses a different inertia range. The sense elements are electrically connected to a common signal conditioning circuit that generates an output signal for each of the sense elements. The signal conditioning circuit has an output that is electrically connected to at least one control system and provides output signals in different ranges to the control system.

Abstract: A balanced resonant micro electromechanical system angular rate sensor includes a feedback control loop that generates a null signal to rebalance the sense element to cancel any a Coriolis force induced displacement of the proof mass. The null signal is proportional to the Coriolis force and is used as the sensor output signal. A test signal is injected into the null signal feedback control loop. The resulting sensor output signal is a function of the test signal. If there is no change in the output signal following the injection of the test signal or if the output signal resulting from the test signal exceeds a predetermined threshold, the sensor is defective. Because the test signal is used to cancel the proof mass displacement, the test verifies operation of the sensor element.

Abstract: A pressure sensor is mounted integrally in a hydraulic valve body. The sensor has a base which extends into a bore formed in the valve body. The valve body bore is in communication with a pressurized hydraulic fluid. A first circumferential groove formed in the sensor base carries an O-ring which forms a seal between the sensor and the wall of the valve body bore. A second circumferential groove formed in the sensor base carries a spring ring which extends into a corresponding groove formed in the wall of the valve body groove. The spring ring cooperates with the sensor base and valve body bore grooves to retain the sensor in the valve body bore.

Abstract: A pressure sensor is mounted integrally in a hydraulic valve body. The sensor has a base which extends into a bore formed in the valve body. The valve body bore is in communication with a pressurized hydraulic fluid. A first circumferential groove formed in the sensor base carries an O-ring which forms a seal between the sensor and the wall of the valve body bore. A second circumferential groove formed in the sensor base carries a spring ring which extends into a corresponding groove formed in the wall of the valve body groove. The spring ring cooperates with the sensor base and valve body bore grooves to retain the sensor in the valve body bore.