67 results about "Force-sensing resistor" patented technology

A force sensing resistor (FSR) includes a substrate having separated electrically conductive traces and another substrate having a resistive layer in which the substrates are subjected to a biasing force such that the substrates contact one another with the resistive layer electrically connecting the traces with a resistance inversely dependent on the biasing force. Upon an external force applied towards a substrate, the substrates contact one another with a total force which is the sum of the forces with the resistive layer electrically connecting the traces with a resistance inversely dependent on the total force. An FSR output which is a function of the resistance is measured. Whether a change in magnitude of the FSR output during a time interval is greater than a threshold is determined. A touch applied on the FSR is detected during the time interval if the change is greater than the threshold.

A portable electronic drumhead includes a sensor responsive to drumstick impacts in producing electrical signal pulses input to headphones to thereby simulate sounds of an acoustic drumhead. The sensor includes a Force Sensing Resistor (FSR) lamination coated with an electrically conductive polymer ink, a spacer lamination, and a flexible electrode lamination having on an inner surface thereof a pair of interdigitated electrodes, the electrode lamination elastically contacting the FSR lamination in response to drumstick impacts on the outer surface of the electrode lamination or FSR lamination to thus momentarily reduce electrical resistance between the electrodes. Resilient batter pads overlying the laminations muffle sounds produced by drumstick impacts. Optionally, the sensor may have an annular ring shape which may be placed concentrically on the head of an acoustic drum, the sensor having an upwardly protruding resilient bumper strikable to produce electronically synthesized rim shot sounds.

A force sensing resistor includes two substrates. Conductive traces including first, common, and calibration fingers are on the first substrate and define a contact area. A spacer surrounds the contact area and attaches the substrates together such that a cavity separates the substrates in the contact area. A first resistive layer is on the second substrate and arranged within the cavity. In response to a force moving one substrate, the first resistive layer electrically connects the first and common fingers with a resistance dependent upon resistivity of the first resistive layer and the applied force to produce an electrical signal indicative of the applied force. A second resistive layer is arranged within the cavity and electrically connects the calibration and common fingers with a resistance dependent upon resistivity of the second resistive layer to produce an electrical signal indicative of the resistivity of the second resistive layer.

A force sensing resistor (FSR) includes a substrate having separated electrically conductive traces and another substrate having a resistive layer in which the substrates are subjected to a biasing force such that the substrates contact one another with the resistive layer electrically connecting the traces with a resistance inversely dependent on the biasing force. Upon an external force applied towards a substrate, the substrates contact one another with a total force which is the sum of the forces with the resistive layer electrically connecting the traces with a resistance inversely dependent on the total force. An FSR output which is a function of the resistance is measured. Whether a change in magnitude of the FSR output during a time interval is greater than a threshold is determined. A touch applied on the FSR is detected during the time interval if the change is greater than the threshold.

Logic of a handheld controller can implement sensor fusion algorithms based on force data provided by a force sensing resistor (FSR) in combination with touch data or proximity data provided by a touch sensor or an array of proximity sensors, respectively. An example sensor fusion algorithm can be used to re-calibrate the FSR when an object contacts an associated control, as detected by the touch sensor. Another example sensor fusion algorithm can be used to ignore spurious inputs detected by the FSR when an object is in contact with an adjacent control. Another example sensor fusion algorithm can be used to detect a hand size of a hand grasping a handle of the controller, as detected by the array of proximity sensors, and to adjust the threshold force to register a FSR input event at the FSR according to the hand size.

A method for analyzing a gait pattern includes: measuring, by a plurality of force sensing resistor (FSR) sensors, foot pressure values, and outputting the measured foot pressure values, respectively; searching for a maximum pressure local area in which the sum of the output values from the FSR sensors included in each of a plurality of pressure local areas is maximized; calculating a center of pressure (COP) with respect to the detected maximum pressure local area; and analyzing a gait pattern by adding the calculated COP to the trajectory of COPs.

A system and method is provided for detecting fluid low-volume and occlusion in a device using force sensing resistor (FSR) sensor. One or more force sensing resistors are positioned in communication with a fluid channel at one or more of a pump intake and pump outlet to detect pressure in the fluid channel. The pressure is detected through communication with the force sensing resistor and indicates an irregular system condition including but not limited to, fluid low-volume level and occlusion. Also provided are a fluid flow sensor (e.g., FSR or MEMS sensor) disposed relative to an embedded fluid channel in the base of a wearable medicine delivery pump.

A force sensing resistor (FSR) that is constructed with a first substrate made of polyimide disposed underneath a second substrate that is resistive and flexible. A handheld controller for an electronic system may include the FSR having a first substrate made of polyimide. The FSR may be mounted on a planar surface of a structure within the controller body, such as a structure mounted within a handle of the controller body, and / or a structure that is mounted underneath at least one thumb-operated control that is included on a head of the controller body. The FSR may be configured to measure a resistance value that corresponds to an amount of force applied to an outer surface of the handle and / or an amount of force applied to the at least one thumb-operated control.

Embodiments of a force sensing resistor (FSR) are disclosed. The FSR has one or more external conductive layers, applied to at least part of the contact surface of the FSR, so that when a conductive probe presses the FSR, initial zero-force contact with the FSR can be detected immediately. The external conductive layer or layers may be rigid sheet metal, flexible sheet metal, metallic-coated polymer, conductive polymer, conductive elastomer, or other conductive material. A lead or trace may be electrically coupled to the external conductive layer or layers to allow for ease of coupling to a circuit or circuit board.

Pressure sensitive transducer assembly that includes a force sensing resistor. The force sensing resistor includes: first and second substrates; at least a first and a second electrically conductive traces on the inner surface of the first substrate including interdigitated fingers defining a sensitive area; and a resistive layer facing the sensitive area. The force sensing resistor includes an auxiliary trace on the inner surface of the first substrate connecting the first trace to the second trace through a constant resistance that is not dependent on the force applied to the substrates. The constant resistance being of a value largely greater than the value of the variable resistance which can be measured indirectly between the fingers when an external force is applied to the substrates. A system and a control method are also proposed.

Logic of a handheld controller can implement sensor fusion algorithms based on force data provided by a force sensing resistor (FSR) in combination with touch data or proximity data provided by a touch sensor or an array of proximity sensors, respectively. An example sensor fusion algorithm can be used to re-calibrate the FSR when an object contacts an associated control, as detected by the touch sensor. Another example sensor fusion algorithm can be used to ignore spurious inputs detected by the FSR when an object is in contact with an adjacent control. Another example sensor fusion algorithm can be used to detect a hand size of a hand grasping a handle of the controller, as detected by the array of proximity sensors, and to adjust the threshold force to register a FSR input event at the FSR according to the hand size.

Archery bow overdraw or under draw sensing system is comprised of four main parts: (1) a force sensing resistor (FSR) on the bow limb near a cam between the draw stop on the cam and the bow limb where the draw stop rests on the bow limb at full draw or on the grip; (2) at least one LED light mounted on or adjacent to the bow sight; (3) a controller for reading the force of the draw stop on the force sensing resister (FSR) and controlling the on / off function of the LED; and (4); and a power source for the system.

The invention provides a MEMS polysilicon nanofilm pressure sensor chip and a manufacturing method thereof, and relates to a sensor chip and a manufacturing method thereof. The sensor includes a monocrystalline silicon substrate (1), a pressure sensing film (4) having the section of a flat polysilicon is arranged on the silicon substrate, an enclosed cavity (2) is formed between the pressure sensing film and the substrate by taking silica as a sacrificial layer, the upper surface of the pressure sensing film (4) is provided with four polysilicon nanofilm force sensing resistors (5), the four polysilicon nanofilm force sensing resistors (5), the pressure sensing film (4), and metal leads are isolated by insulation layers (7), the four force sensing resistors (5) are connected to form a Wheatstone bridge via the metal leads to convert the pressure to voltage to output, and sealed corrosion holes (3) are arranged outside the edge of the pressure sensing film (4). The sensor preparing method is compatible with integrated circuit technology and is easy to integrate. The sensor has the characteristics of high linearity sensitivity, wide operational temperature range, high overload capability, easy integration, and low cost.

The invention provides a detection system, a detection method and an adjustment method for the uniformity of a cutting edge of a printing scraper. The detection system comprises three hardware units, namely an equipment base, a clamping downward-pressing unit and a measuring unit; a precision galvanometer and a force sensing resistor form a circuit system group; a different point of the uniformity of the scraper cutting edge is visually measured by applying the pressure and adopting a current data difference mode; the measured difference point is subjected to data processing and positioning to obtain the corresponding uniformity and adjustment strategy.

A control switch arrangement for sequentially controlling different operating states in a moving beam reader or an imager employs a force sensing resistor switch requiring a low actuation force, and a control switch with improved tactile feedback and ergonomic efficiency between the switches.

A force sensing resistor (FSR) sensor with bladder system provides for ingress protection for FSR sensors by using sealed bladder areas, which act as air reservoirs. A sealed bladder area is attached to an air vent of a sensor area. The sensor area includes two conductive layers forming an open circuit in the static state, the two conductive layers separated by an air cavity. When a force is applied to the sensing area, the two conductive layers are forced toward each other to form a short circuit and the air in the air cavity is forced out the air vent into the bladder area. When the applied force is removed, the air in the bladder area returns into the air cavity separating the two conductive layers to form the open circuit. The bladder area provides a sealed environment within the FSR sensor, ensuring more reliable and consistent measurements.

Pre-loaded force sensitive input devices, force sensing resistors (FSR), are formed as a multiple membrane assembly that is capable of detecting low intensity pressure inputs and quantifying varying applications of pressure to the sensor surface. Pre-loading the force sensor elements results in a controlled amount of force between the two substrates causing a constant state of pre-load and eliminating the low-end or minimal pressure signal noise associated with unloaded sensors. Pre-loading the force sensing resistor sensor also enables the sensor to detect removal of low intensity pressure input such as might occur during theft of light weight articles placed in contact with the pre-loaded force sensor. Using an FSR or FSR Matrix Array will enable any handling of protected retail packaging to be detected and identified. A library of “touches” can be established that will yield cutting, ripping, twisting, etc. making the detection of a theft in progress more accurate.

A control switch arrangement for sequentially controlling different operating states in a moving beam reader or an imager employs a force sensing resistor switch requiring a low actuation force, and a control switch with improved tactile feedback and ergonomic efficiency between the switches.

A resistive force sensing circuit and a resistive force sensing apparatus. The circuit includes a plurality of sensor circuit inputs, a plurality of sensor circuit outputs; and a plurality of resistor units. Each of the resistor units includes a force-sensing resistor, a first side resistor, and a second side resistor. The first terminals of the force-sensing resistor, the first side resistor and the second side resistor are electrically connected to each other at one node, a second terminal of the force-sensing resistor is electrically connected to one of the sensor circuit inputs, and second terminals of the first side resistor and the second side resistor are electrically connected to two adjacent sensor circuit outputs, respectively. The first side resistor and the second side resistor are a pair of resistors with substantially equal resistance. The apparatus includes structures to realize the function of the resistive force sensing circuit.

The invention relates to a touch display device, a pressure sensing unit adopted by the touch display device and a manufacturing method of the pressure sensing unit. The pressure sensing unit comprises a base material, multiple first electrodes, multiple second electrodes and multiple force sensing resistor layers, wherein the multiple first electrodes, the multiple second electrodes and the multiple force sensing resistor layers are formed in the surface of the base material, the multiple first electrodes extend in the first direction and are long strip-shaped, the multiple first electrodes are distributed at intervals in the second direction, the multiple second electrodes are mutually arranged in the gaps between any two adjacent first electrodes at intervals, each of the force sensing resistor layers passes over one corresponding first electrode and is connected to the two second electrodes at the two sides of the corresponding first electrode. The pressure sensing unit is arranged between a protection cover and a display unit of the touch display device, so that the sensitivity of pressure sensing is high, and the method of pressure sensing does not limit operational media.

A case for an electronic device including a coupling member detachably coupled to at least a part of the electronic device. A cover, which has one or more folded positions ranging between an opened state and a closed state, the cover extends from the coupling member in a to cover a display of the electronic device, and at least one Force Sensing Resistor (FSR) sensor disposed in the cover to generate an interrupt based on a pressure applied thereto. The at least one FSR sensor includes one or more inner FSR sensors disposed on an inner surface of the cover, and one or more outer FSR sensors disposed on an outer surface of the cover.

We disclose an intelligent headrail for a window covering which includes an extensible end cap which applies force to the adjacent window or door frame to hold the headrail in place. The end cap includes a pressure sensor or a force sensing resistor to detect whether sufficient force is present to safely hold the headrail in place. The headrail may include a controller which is connected to the pressure sensor or a force sensing resistor. The controller may include program code which identifies the safety status of the window covering based on the pressure or force reading. The controller may include a data transmission port which transmits pressure or force readings to an output device. The program code may also send a report to the output device to indicate whether the force or pressure is moderately low or so low that the window covering is in danger of falling.

Logic of a handheld controller can implement sensor fusion algorithms based on force data provided by a force sensing resistor (FSR) in combination with touch sensor data provided by a touch sensor. An example sensor fusion algorithm can be used to pause calibration adjustments for the touch sensor—at least with respect to a high-level value that corresponds to a touch of a control—in response to a user pressing upon the control of the handheld controller with an above-threshold amount of force, which may be detected by a FSR associated with the control. For instance, calibration adjustments with respect to the high-level value can be paused in response to FSR values crossing a threshold value from below the threshold value to above the threshold value, and the calibration adjustments can be resumed in response to the FSR values crossing the threshold value in the opposite direction.

Pre-loaded force sensitive input devices, force sensing resistors (FSR), are formed as a multiple membrane assembly that is capable of detecting low intensity pressure inputs and quantifying varying applications of pressure to the sensor surface. Pre-loading the force sensor elements results in controlled amount of force between the two substrates causing a constant state of pre-load and eliminating the low-end or minimal pressure signal noise associated with unloaded sensors. Pre-loading the force sensing resistor sensors also enables the sensor to detect removal of low intensity pressure input such as might occur during theft of light weight articles placed in contact with the pre-loaded force sensor. Using an FSR or FSR Matrix Array will enable any handling of protected retail packaging to be detected and identified. A library of “touches” can be established that will yield cutting, ripping, twisting, etc. making the detection of a theft in progress more accurate.

A device and method for human intention detection Sensor Band (HID). In preferred embodiments, it makes use of an array of force sensing resistors (FSRs) which are embedded inside a flexible band, which is capable of reading the muscle activity for different motion type and muscle forcein a human user. In one implementation of the invention two of such bands are attached to the forearm and the upper arm. From the readings of the sensors, the patterns for motion type and muscle force are then distinguished autonomously by machine learning, a Support Vector Machine (SVM) algorithm, or a neural network. The method is advantageous e.g. the detection of dexterous motion of the arms, upon which assistive exoskeleton can be controlled for motion assistance. The invention can also be applicable to hand gestures recognition and bilateral rehabilitation, besides this the invention can be used to control lower body exoskeleton as well.

A manipulation and force measuring device includes a planar force sensing resistor, a protective material surrounding the resistor, and an outer material surrounding the protective material. A first strap extends outwardly from the outer material. The first strap has one of a hook and loop fastener disposed thereon. A second strap extends outwardly from the outer material, distal from the first strap. The second strap has the other of the hook and loop fastener disposed thereon. A processor is attached to one of the first strap and the second strap. The processor is electronically connected to the resistor. A loop extends outwardly from the outer material. The loop is located proximate to the first strap. A method of using the device is also disclosed.

Adevice and method for human intention detection (HID). In preferred embodiments, it makes use of an array of force sensing resistors (FSRs) which are embedded inside a flexible band, which is capableof reading the muscle activity for different motion type and muscle forcein a human user. In one implementation of the invention two of such bands are attached to the forearm and the upper arm. Fromthe readings of the sensors, the patterns for motion type and muscle forceare then distinguished autonomously by machine learning, a Support Vector Machine (SVM)algorithm, or a neural network. The method is advantageous e.g. the detection of dexterous motion of the arms, upon which assistive exoskeleton can be controlled for motion assistance. The invention can also be applicable to hand gesturesrecognition and bilateral rehabilitation, besides this the invention can be used to control lower body exoskeleton as well.

A system and method for driving a power driven wheelchair is provided. One system embodiment may include, for example, a plurality of force sensing resistors, at least one force sensing resistor comprising a contactable surface for sensing a pressure thereon, wherein the at least one force sensing resistor generates a proportional signal in response to the sensed pressure. A controller comprising at least one input for receiving the proportional signal and having logic to receive the proportional signal and generate a control signal which is outputted to a motor controller to control the power driven wheelchair.