Abstract:
A process for manufacturing a fabric pressure sensor comprises cutting a sensing fabric to a pre-determined size, connecting a flexible electric wire with a wire of the sensing fabric by sewing, fixing the sensing fabric by means of a clamping positioner at a pre-determined tension, bonding a lower conversion layer with the sensing fabric by means of a lower conversion layer positioning box, bonding an adjustable column with the sensing fabric by means of an upper conversion layer positioning box, and bonding the upper conversion layer with the adjustable column by means of the upper conversion layer positioning box. A tool for manufacturing the sensor comprises an electrical property measuring device, a wire connecting tool, and a sensor structural component assembling tool. The present invention provides an easy and convenient way of manufacturing a fabric pressure sensor, monitoring the quality of manufacture, and enhancing the manufacturing precision and product yield.
Abstract:
A deformation measurement sensor for measuring pressures and shearing forces according to the present invention includes: a plurality of beams shaped like a lattice; a strain gauge attached to each of the plurality of beams for measuring a deformation rate; a frame connected to the end of the lattice shape for surrounding the plurality of beams; and holes for arranging lines and formed in the intersections of the plurality of beams, whereby it is possible to precisely measure the deformation rate depending on the pressures or shearing forces exerted to a plurality of areas.
Abstract:
A stitched sensor including a plurality of threads stitched to a textile in a stitch geometry is described. The plurality of threads includes a conductive thread, and the stitch geometry is configured such that an electrical property of the stitched sensor changes based on at least one of stretching, relaxation, or bending of the textile. Methods for forming a stitched sensor are also described.
Abstract:
An optically transparent force sensor, which may be used as input to an electronic device. The optically transparent force sensor may be configured to compensate for variations in temperature using two or more force-sensitive components that are formed from materials having different temperature- and strain-dependent responses.
Abstract:
Disclosed is a touch position sensor. Force detection circuitry can be included with the position sensor, for example, to determine an amount of force applied to a touch panel of the sensor.
Abstract:
An optically transparent force sensor that may compensate for environmental effects, including, for example, variations in temperature of the device or the surroundings. In some examples, two force-sensitive layers are separated by a compliant layer. The relative electrical response of the two force-sensitive layers may be used to compute an estimate of the force of a touch that reduces the effect of variations in temperature. In some examples, piezoelectric films having anisotropic strain properties are used to reduce the effects of temperature.
Abstract:
A low profile, high capacity load cell suitable for use in connection with in motion weighing or other weighing scales and systems. Also disclosed are scales for use with the load cell, and systems for using the scales. The load cells are especially suited for use in high speed in-motion weighing.
Abstract:
Steering wheel hand detection systems are disclosed herein. The systems can optionally be used with a system for identifying the presence and/or location of a driver's hands on the steering wheel. The systems include a sensor mat including a plurality of sensor loops arranged in the steering wheel to achieve multiple sensing zones. Because the systems include a sensor mat including a plurality of sensor loops, the systems can be implemented in steering wheels having different designs. The systems can also be implemented to achieve different numbers and/or types (e.g., tap detection, swipe detection, grip detection, etc.) of sensing zones. Additionally, the systems can be implemented in a way that reduces the likelihood of crosstalk due to wire routing.
Abstract:
Disclosed is a touch position sensor. Force detection circuitry can be included with the position sensor, for example, to determine an amount of force applied to a touch panel of the sensor.
Abstract:
An electronic device may be provided with a flexible printed circuit. The flexible printed circuit may have layers of metal and dielectric. Strain gauge resistors may be formed from a strain gauge metal such as constantan. The strain gauge metal may be formed within the flexible printed circuit layers. A strain gauge may include strain gauge circuitry coupled to a strain gauge bridge circuit. Strain gauge resistors for the bridge circuit may be formed from traces that follow parallel meandering paths in the flexible printed circuit layers. A component such as a fingerprint sensor may overlap the strain gauge resistors. Strain gauge resistors may be formed in different overlapping metal layers in the flexible printed circuit layers or may be formed from the same metal layer. Electroplating techniques may be used to form metal traces to which solder balls or wire bonds are coupled.