312results about "Apparatus with stored calibration coefficients" patented technology

A calibration method for a hand-held surgical instrument is disclosed. The hand-held instrument includes a drive motor, a firing rod controlled by the drive motor and having at least one indicator, and a sensor configured to detect the at least one indicator. A microcontroller includes a pulse modulation algorithm stored therein to control the drive motor. The microcontroller executes a calibration algorithm to adjust at least one program coefficient in the pulse modulation algorithm.

Methods and systems for capacitive proximity and contact sensing employ one or more simple sensors (which may be a conductive fiber or pattern of conductive ink) in communication with a microcontroller. Digital signal processing executed by the microcontroller enables resolution enhancement, automatic and continuous calibration, noise reduction, pattern recognition and the configuration of virtual sensors capable of detecting how an object incorporating the sensors is being manipulated.

Reactive sensors typically exhibit nonlinear response to temperature variation. Systems and methods are disclosed for compensating for the nonlinear and / or temperature dependent behavior of reactive sensors and for calibrating the post-compensation output signals relative to known samples of the physical parameter under measure. One call of embodiments includes a housing containing at least part of a reactive sensor, a monolithic integrated circuit and a timing reference. The integrated circuit includes a waveform generator for generating a sensor exciting signal, a detector for detecting the response of the sensor to the combination of the exciting signal and the under-measure physical parameter, a temperature compensating unit and the Pade Approximant nonlinearity compensating unit are tuned by use of digitally programmed coefficients. The coefficients calibrate the final output as well as compensating for nonlinearity and temperature sensitivity.

Apparatus and an accompanying method for calibrating a sensor signal conditioner coupled to a sensor. The signal conditioner sensor enables relatively easy and precise calibration of bridge sensors without the use of a microprocessor. When mated to a resistive bridge sensor, the sensor signal conditioner can digitally calibrate offset and gain, with an option to calibrate offset and gain coefficients and linearity over temperature. A second order compensation can be enabled for temperature coefficients of gain, offset or bridge linearity.

A distributed sensor system includes a set of spatially distributed base units and a central server both in communication with a data network. Each base unit includes a controller and one or more sensor modules where each sensor module includes a sensor configured to measure an air quality parameter. Each base unit transmits raw sensor data associated with each of the sensor modules over the data network and the central server receives the raw sensor data from the base units and stores the raw sensor data in a database.

A system and method for determining the angular position of a bearing assembly and compensating measurements for bearing runout error in metrology devices, such as an articulated arm coordinate measurement device and a laser tracker, is provided. The system and method includes measuring the bearing runout error and defining a waveform from encoder readings for a first set of rotations. In one embodiment, a transfer function is created based on an analysis of the bearing runout error, such as with a Fourier analysis for example. In another embodiment the bearing runout error is mapped to an absolute angular position. During operation, the angular position of the bearing assembly is determined by comparing a waveform to the waveform from the first set of rotations. With the angular position determined, the bearing runout error may be used to compensate the measurements of the metrology device.

A magnetic field sensor includes a true power on state (TPOS) detector for which a measured threshold value is stored prior to power down and recalled upon power up. A corresponding method is associated with the magnetic field sensor.

A self-calibrating key sensor system is constituted by an optical modulator, optical position transducers, a data accumulator and a data analyzer, and the optical modulator has a gray scale section to produce a key position signal varied together with the keystroke and an absolute data section to produce a calibration signal representative of a strictly adjusted distance between transparent areas of the absolute data section; the data accumulator accumulates discrete values of the calibration signal and discrete values of the key position signal together with the sampling time, and the data analyzer determines the gradient of the key position signal on the basis of peaks of the calibration signal produced at both ends of the strictly adjusted distance so as to estimate the true distance between the rest and end positions.

The invention provides a calibration tool for a vehicle monitoring device, the tool having a processor with a clock or access to a time signal and arranged for connection to and to receive and process signals from a vehicle on-board diagnostics unit (OBD), the processor having or connected to means for storing data relating to the vehicle and its engine and codes relating to signals from the available OBD outputs and inputs, the processor being programmed to calculate and store certain coefficients derived over the vehicle's operating range and to populate an array with the said coefficients so that the processor can look up the corresponding co-efficient from the array to calculate the desired value or output. The invention extends to a method of calibrating a calibration tool or a vehicle-monitoring device mounted in a vehicle provided with such a calibration tool. The method comprises the steps of configuring the calibration tool to receive data from vehicle sensors including those indicating vehicle road and engine speed data and temperature data, operating the vehicle, processing the data received during operation of the vehicle to calculate coefficients specific to the vehicle, and populating look-up tables that are accessible to the vehicle monitoring device with the calculated coefficients.