A portable electronic communication device including a display, a pressure sensor array including a plurality of pressure sensors, and an electronic processor communicatively coupled to the pressure sensor array. The electronic processor is configured to receive, from the pressure sensor array, a plurality of stress tensor measurements corresponding to a user interaction with the display, perform an interpolation of the plurality of pressure measurements, and determine, based on the interpolation, a faulty sensor of the plurality of sensors.

A method for determining a resultant force is provided including includes performing a standard calibration by evenly applying a force across a plurality of sensing areas of a sensor system, performing a non-standard calibration by non-evenly applying a force across the plurality of sensing areas of the sensor system, developing a machine learning algorithm based on data collected during the standard calibration and the non-standard calibration, detecting a field use force applied to a sensing area of the sensor system, and using the machine learning algorithm to correct a force measurement of the field use force applied to the sensing area of the sensor system.

A method for determining a resultant force is provided including includes performing a standard calibration by evenly applying a force across a plurality of sensing areas of a sensor system, performing a non-standard calibration by non-evenly applying a force across the plurality of sensing areas of the sensor system, developing a machine learning algorithm based on data collected during the standard calibration and the non-standard calibration, detecting a field use force applied to a sensing area of the sensor system, and using the machine learning algorithm to correct a force measurement of the field use force applied to the sensing area of the sensor system.

A method for calibrating an output of a torsional vibration transducer can include: providing a torsional vibration transducer proximate to a body of a shaft configured to rotate along an axis of rotation, the torsional vibration transducer configured to measure a torsional vibration of the shaft; actuating the shaft to cause rotation of the shaft; while the shaft rotates, acquiring, using the torsional vibration transducer, a plurality of zero-stress measurements of the shaft across a plurality of gaps between the torsional vibration transducer and the shaft; calculating at least one calibration coefficient using the plurality of zero-stress measurements; and calibrating the output of the torsional vibration transducer according to the at least one calibration coefficient to reduce a sensitivity of the torsional vibration transducer to changes in gap between the torsional vibration transducer and the shaft when the torsional vibration of the shaft is measured.

An automatic robot control system and methods relating thereto are described. These systems include components such as a touch screen panel (“TSP”) robot controller for controlling a TSP robot, a camera robot controller for controlling a camera robot and an audio robot controller for controlling an audio robot. The TSP robot operates inside a TSP testing subsystem, the camera robot operates inside a camera testing subsystem, and the audio robot operates inside an audio testing subsystem. Inside the audio testing subsystem, an audio signals measurement system, using a bi-directional coupling, controls the operation of the audio robot controller. In this control scheme, a test application controller is designed to control the different types of subsystem robots. Methods relating to TSP, camera, and audio robots, and their controllers, taken individually or in combination, for automatic testing of device functionalities are also described.

A gas sensor includes an electrically conductive membrane that bends with an applied surface stress, a fixing member disposed outside the membrane, a coupling portion that couples together the membrane and the fixing member, a flexible resistor whose resistance value changes in accordance with a deflection that occurs in the coupling portion, a conductive support substrate connected to the fixing member and disposed with a gap between the membrane and the coupling portion, a receptor which is formed on an area including the center of a surface on one side of the membrane which is opposite to the other side facing the support substrate, and deforms in accordance with a substance adsorbed, a first terminal capable of applying a first potential to the membrane, a second terminal capable of applying a second potential to the support substrate, and an insulating portion electrically insulating the fixing member from the support substrate.

A service life testing device for a pressure sensor includes a first and a second plates, the first plate including a stage carrying a to-be-tested pressure sensor; a pair of drivers, two ends thereof respectively connected to the first and the second plates; a pair of linear slide mechanisms, disposed between the first and the second plates, and each including a slide rail and a slider moving there along, where a compression spring is disposed along an axial direction of each slide rail; a jig, disposed between the first and the second plates, and facing the to-be-tested pressure sensor; and a processing unit, electrically connected to the drivers and the to-be-tested pressure sensor, and configured to control a moving direction, a moving speed, and a moving stroke of the drivers, to cause the to-be-tested pressure sensor to press against or move away from a surface of the jig.

A service life testing device for a pressure sensor includes a first and a second plates, the first plate including a stage carrying a to-be-tested pressure sensor; a pair of drivers, two ends thereof respectively connected to the first and the second plates; a pair of linear slide mechanisms, disposed between the first and the second plates, and each including a slide rail and a slider moving there along, where a compression spring is disposed along an axial direction of each slide rail; a jig, disposed between the first and the second plates, and facing the to-be-tested pressure sensor; and a processing unit, electrically connected to the drivers and the to-be-tested pressure sensor, and configured to control a moving direction, a moving speed, and a moving stroke of the drivers, to cause the to-be-tested pressure sensor to press against or move away from a surface of the jig.

A method for determining a resultant force is provided including performing a standard calibration by evenly applying a force across a plurality of sensing areas of a sensor system, performing a non-standard calibration by non-evenly applying a force across the plurality of sensing areas of the sensor system, developing a machine learning algorithm based on data collected during the standard calibration and the non-standard calibration, detecting a field use force applied to a sensing area of the sensor system, and using the machine learning algorithm to correct a force measurement of the field use force applied to the sensing area of the sensor system.

A method for determining a resultant force is provided including performing a standard calibration by evenly applying a force across a plurality of sensing areas of a sensor system, performing a non-standard calibration by non-evenly applying a force across the plurality of sensing areas of the sensor system, developing a machine learning algorithm based on data collected during the standard calibration and the non-standard calibration, detecting a field use force applied to a sensing area of the sensor system, and using the machine learning algorithm to correct a force measurement of the field use force applied to the sensing area of the sensor system.