Abstract: The present invention provides the stress detection method for force sensor device with multiple axis sensor device and force sensor device employing this method, whose installation angle is arbitrary. The stress detection method includes, first and second force sensors whose detection axes are orthogonal to each other. When the detection axis of first force sensor forms angle ? with direction of detected stress Ax, and the stress component of direction perpendicular to direction of the detected stress Ax is Az, output Apx of the axis direction of first force sensor is found as Apx=?x (Ax×cos ?+Az×sin ?), and output Apz of the axis direction of the second force sensor is found as Apz=?z (Ax×sin ?+Az×cos ?), and, when ?x and ?z are detection sensitivity coefficients of first and second force sensors respectively, the detection sensitivity coefficient ?z of second force sensor is set as ?z=?x tan ?, and the detected stress Ax is found as Ax=(Apx?Apz)/?x(cos ??tan ?×sin ?).

Abstract: A piezoresistive device is provided for sensing mechanical input and converts mechanical movement of at least two relatively movable parts into an electrical output. A silicon substrate is provided that is oriented in the (100) plane and has an n-type impurity. A gap extends across a portion of the substrate. The gap defines the at least two relatively moveable parts. A flexible cross-section connects the at least two relatively moveable parts. The cross-section is made of the same material as the substrate. At least one strain sensitive element is provided on a surface of the silicon substrate, is aligned in a [110] direction and includes a p-type impurity. The strain sensitive element has two end portions interconnected by an intermediate neck portion. The neck portion is supported on a structure that concentrates strain. The structure extends across the gap and has vertical walls that extend to the cross-section in the gap. The structure is made of the same material as the substrate.

Abstract: An occupant load sensor of a seat for a vehicle includes a strain member, a connecting member, first and second strain gauge plates, an upper bracket, an amplifier substrate, and an FPC substrate. The strain gauge plates are attached to a surface of the strain member and respectively arranged between a central portion and both end portions of the strain member. Each strain gauge plate includes two strain detecting elements forming a half bridge circuit of a Wheatstone bridge circuit. The FPC substrate is connected to the amplifier substrate and to the strain gauge plates between the both end portions and the central portion of the strain member. Further, the FPC substrate includes a plurality of wiring patterns. The Wheatstone bridge circuit is formed with the plurality of wiring patterns and the half bridge circuit formed at each strain gauge plates.

Abstract: A pneumatic tire comprises a tread portion, a pair of bead portions and a pair of sidewall portions, and at least one of the sidewall portions is provided with at least three strain sensors disposed at least three circumferentially different mounting positions, respectively. The at least three strain sensors are oriented at angles ? with respect to tire radial directions at the respective mounting positions. The orientation angles ? of at least two of the at least three strain sensors are different from one another and their difference(s) is(are) not less than 20 degrees in absolute value.

Abstract: Simple and inexpensive electrical compensation for off-axis and off-center loading sensitivity is possible in compression column load cells having a pair of compensation strain gages in series with each of the main strain gages in the load cell. The compensation gages are connected in series with their associated main strain gage. Each set of one main strain gage and two series connected compensation gages form one bridge arm in a strain gage bridge. Two compensation gages meet at each bridge corner, and are shunted by a common trimming resistor. The loading sensitivity compensation works for both conventional fixed axis load cells and Rocker Pin load cells.

Abstract: A mold-clamping force is detected based on an output from a strain detection apparatus (30) provided to a mold-clamping apparatus of a molding machine. A first output value output from the strain detection apparatus (30) is detected when the mold-clamping apparatus is in a maximum mold open state. A second output value output from the strain detection apparatus (30) is corrected based on the first output value when a mold-clamping force is generated by the mold-clamping apparatus. The mold-clamping force is acquired based on the corrected second output value. A correction is made after converting an output from the strain detection apparatus (30) into a digital value, or a strain gauge (50) is used so as to change a reference voltage supplied to a comparison amplifier of the strain gauge using the strain gauge based on the first output value.

Abstract: There is provided a method for producing a force sensor including: a force sensor chip; and an attenuator, in which the force sensor chip and the attenuator are joined at joint portions with a glass layer sandwiched therebetween. The method includes: a film forming step in which a glass film as the glass layer is formed on regions of the attenuator containing the joint portions or on regions of the force sensor chip containing the joint portions; and an anodic bonding step in which the force sensor chip and the attenuator are stacked as a stacked body in close contact with each other at the joint portions, and the glass film and the force sensor chip, or the glass film and the attenuator, are joined.

Abstract: In a seat load detecting device, sensor bodies are interposed between an upper rail and respective lower brackets. Each sensor body includes an annular strain portion which axial line extends vertically, an outer peripheral holder which is mounted to the upper rail and which holds an outer peripheral edge of the strain portion, and an inner peripheral holder which is mounted to the lower bracket and which holds an inner peripheral edge of the strain portion. Strain gauges for detecting a load applied to a seat on the basis of a strain amount between an outer periphery and an inner periphery of each strain portion are disposed on each strain portion. A second clamping member of each inner peripheral holder has a mounting hole which is formed through the second clamping member in a widthwise direction thereof and which rockably connects the lower bracket.

Abstract: The invention relates to a roller bearing comprising curved running paths, in addition to roller bodies and strain gauge sensors which are arranged between said running paths, said sensors being located in a groove on the outer diameter of the outer ring and/or on the inner diameter of the inner ring. The length of two adjacent strip conductor sections of the strain gauge sensor varies in such a way as to measure the angular position of the roller bodies between the strip conductors.

Abstract: A load cell includes a first element, a second element and a sensor measuring force between the first and second elements along a first axis. In some embodiments, lateral and angular decoupling is provided by the provision of a convex surface between the first and second elements. The convex surface is slidable relative to at least one of the first and second elements in a first direction perpendicular to the first axis.

Abstract: A tensile force measuring device provides improved linearity and temperature transient behavior. A column load cell (10) in the device is connected at its ends to a first and a second roller chain portion (34, 36), which are in turn connected to the tensile force, to dispose the column load cell to the tensile force between the chain portions. The roller chain portions are connected to the load cell in mutually perpendicular orientation. The load cell has notches (18) formed in the side thereof to equalize the strain thereupon when tensile load is applied. Longitudinal and transverse strain gages (20) are positioned longitudinally intermediate to the notches, and may be on a gaging web (22).

Abstract: A semiconductor force sensor capable of preventing a diaphragm part from being broken and accurately measuring a force applied thereto in a direction orthogonal to the diaphragm part, wherein a force transmitting device for applying a measured force to the diaphragm part of a semiconductor force sensor element is formed of a sphere having a rigidity, and a through hole passing through an opposed wall part toward the diaphragm is formed in the opposed wall parts at a position opposed to the center part of the diaphragm part so that a part of the sphere can face the outside of the opposed wall part and stores a part of the remaining part of the sphere to allow the sphere to be moved only in a direction orthogonal to the diaphragm part and rotated on the center part of the diaphragm part.

Abstract: A seat load measuring apparatus which can be effectively adopted to various kinds of motor vehicles without requiring various load sensors having cables of different lengths according to the kinds of motor vehicles, thereby providing improved installation, maintenance and manufacturing benefits. A seat load measuring apparatus may include a connector of a load sensor is a male connector having terminals projecting downwardly. The entry of the male connector faces the open bottom of a protector. On the other hand, a cable to be connected to an ECU is provided with a cable-side connector. The cable-side connector is composed of a female connector which is detachable relative to the male connector. Therefore, the load sensor and the cable are detachable from each other, thereby achieving the adaptability of the load sensor and the connector casing a relative to various kinds of motor vehicles.

Abstract: In a force-measuring cell with a deformable body and with at least one strain gauge which has a strain-sensitive electrical resistor track arranged on a polymer carrier substrate, the strain gauge is bonded to the deformable body by an adhesive layer of an inorganic-organic hybrid polymer. For the bonding of the strain gauge to the deformable body, an adhesive compound having an inorganic-organic hybrid polymer in solution is applied to the deformable body, whereupon the strain gauge is placed on the hybrid polymer layer, and the adhesive layer is subsequently hardened at a temperature between 80° C. and 130° C. For the hardening of the adhesive layer, the deformable body with the strain gauge is exposed to the increased temperature for a time period between a half hour and three hours.

Abstract: A system for sensing the load carried in a structural member by attaching a load cell to a neutral axis of bending. Small deflections along an arc of bending create a desirable signal level via mechanical amplification. A load sensor is adapted for mounting on an axle that deviates from a neutral axis when under a load. The load sensor comprises a reaction portion adapted for mounting on the axle and an active portion adapted for mounting to at least two points along the axle. The active portion has an amplifier arm and at least one sensor element. The sensor element is attached at a first end to the reaction portion and the sensor is attached at its second end to the amplifier arm. At least one strain gauge is mounted on the sensor element. At least one flexion web is attached to the reaction portion and to the active portion.

Abstract: Disclosed is a diaphragm type load detection sensor, comprising: a mounting portion attached to a installation plate; a strain generation portion provided on the mounting portion and having a load applied portion formed at the center thereof to which a load to be detected is applied; and a strain gauge provided on the strain generation portion. According to the present invention said strain gauge has sensing elements evenly provided on substantially whole periphery thereof and positioned at the predetermined distances from the center axis of the load applied portion of the strain generation portion.

Abstract: A thin-film resistor (5) provided on a strain-generating part (2) via an insulating film (4) and an electrode thin-film (6) including an electrode pad (10) arranged in the thin-film resistor (5) are provided. The thin-film resistor (5) includes a strain-detecting thin-film resistive part (8) and an electrode connection (9) connected to the resistive part (8). The electrode connection (9) is formed to extend to the electrode pad (10). The electrode pad (10) includes an external-connection bonding area (12) and a testing probe area (13) formed at different positions. The electrode pad (10) is disposed on a tubular rigid body (1) provided at the outer peripheral edge of a strain-generating part (2).

Abstract: A force measuring apparatus comprises a force-transmitting component, on which a strain measuring element is held, which comprises a carrier element and a displacement transducer. The carrier element has two fixing sections at a predefined distance from each other in the direction of the strain with which it is fixed to the component. Furthermore, the carrier element has a strain section, which is provided between the fixing sections and which has a shorter length in the direction of the strain than the distance between the fixing sections and which has a smaller cross section than the remaining carrier element. The displacement transducer is connected to the strain section in order to register the strain of the strain section.

Abstract: A force sensor comprises a force sensor chip, and a buffering device for dampening and applying incoming external force to the force sensor chip. The buffering device comprises an input portion to which external force is input, a sensor mount for fixing the force sensor chip to the exterior, a dampening mechanism for dampening external force, and a transmission portion for transmitting the dampened external force to the active sensing portion.

Abstract: A method of testing and a tester apparatus to determine the axial stress and strain of cements under the temperature and pressures encountered by cement during use in wellbore environments. Using these stress and strain measurements, the Young's Modulus may be established for a material at the encountered temperature and pressure of the wellbore. By combining static tensile strength testing and elasticity measurements of cements, Young's Modulus values for different cement compositions under stresses that are similar to the conditions occurring in an actual wellbore are possible.

Abstract: A piezoresistive device senses mechanical input and converts mechanical movement of at least two relatively movable parts into an electrical output. An SOI substrate is provided. A gap extends across a portion of the substrate. The gap defines the at least two relatively moveable parts and a flexible cross-section that connects the at least two relatively moveable parts. The cross-section is made of a same material as the substrate. At least one strain sensitive element is at a surface of the substrate. The at least one strain sensitive element has two end portions interconnected by an intermediate neck portion. The neck portion is supported on a structure that concentrates strain. The structure extends across the gap and has vertical walls extending to the cross-section in the gap. The structure is made of the same material as the substrate.

Abstract: A load sensor includes a resilient member including a stationary segment, a load-receiving segment extending outward from the stationary segment, and an arm segment between the load-receiving segment and the stationary segment. Moreover, first and second strain-sensor elements are disposed on the same surface of the arm segment. The first strain-sensor element is adjacent to the load-receiving segment and the second strain-sensor element is adjacent to the stationary segment. The arm segment is tapered such that the cross-sectional area of the arm segment decreases from the stationary segment to the load-receiving segment. The narrowest portion of the arm segment has the first strain-sensor element disposed thereon. Accordingly, when a load generated by an impact is applied to the load-receiving segment, the maximum stress is reduced, and moreover, a difference between a stress applied to the first strain-sensor element and a stress applied to the second strain-sensor element is minimized.

Abstract: A load cell type weight measuring device includes a load cell formed of a strain member provided with a plurality of strain gauges and deforming according to a load applied to a load receptacle. The load cell type weight measuring device converts an output of a Wheatstone bridge circuit formed of the respective strain gauges into a weight value to display. Two weight receptacles are attached to the strain member. It is arranged such that when a load is applied to one of the load receptacles, a strain at a portion of the strain member provided with the strain gauges becomes smaller than that when the load is applied to the other of the load receptacles.

Abstract: A piezoresistive device senses mechanical input and converts mechanical movement of at least two relatively movable parts into an electrical output. An SOI substrate is provided. A gap extends across a portion of the substrate. The gap defines the at least two relatively moveable parts and a flexible cross-section that connects the at least two relatively moveable parts. The cross-section is made of a same material as the substrate. At least one strain sensitive element is at a surface of the substrate. The at least one strain sensitive element has two end portions interconnected by an intermediate neck portion. The neck portion is supported on a structure that concentrates strain. The structure extends across the gap and has vertical walls extending to the cross-section in the gap. The structure is made of the same material as the substrate.

Abstract: A piezoresistive device is provided for sensing mechanical input and converts mechanical movement of at least two relatively movable parts into an electrical output. A silicon substrate is provided that is oriented in the (100) plane and has an n-type impurity. A gap extends across a portion of the substrate. The gap defines the at least two relatively moveable parts. A flexible cross-section connects the at least two relatively moveable parts. The cross-section is made of the same material as the substrate. At least one strain sensitive element is provided on a surface of the silicon substrate, is aligned in a [110] direction and includes a p-type impurity. The strain sensitive element has two end portions interconnected by an intermediate neck portion. The neck portion is supported on a structure that concentrates strain. The structure extends across the gap and has vertical walls that extend to the cross-section in the gap. The structure is made of the same material as the substrate.

Abstract: A load sensor hardly causing error in weight measurement even when the environmental temperature of the load sensor varies, and a seat weight measuring apparatus using the load sensor. The sensor includes a plurality of strain gauges form a bridge circuit. The strain gauges forming the bridge circuit are attached to the front and back surfaces of a base plate at substantially the same location. Portions of a flexible substrate, on which the strain gauges are formed, are folded and adhered to the back of the sensor plate with adhesive. The bridge circuit formed by the strain gauges compensates for the variation in resistance among the strain gauges generated due to the temperature distribution of the base plate, resulting in little or no variation in output.

Abstract: In a seat load detecting device, sensor bodies are interposed between an upper rail and respective lower brackets. Each sensor body includes an annular strain portion which axial line extends vertically, an outer peripheral holder which is mounted to the upper rail and which holds an outer peripheral edge of the strain portion, and an inner peripheral holder which is mounted to the lower bracket and which holds an inner peripheral edge of the strain portion. Strain gauges for detecting a load applied to a seat on the basis of a strain amount between an outer periphery and an inner periphery of each strain portion are disposed on each strain portion. A second clamping member of each inner peripheral holder has a mounting hole which is formed through the second clamping member in a widthwise direction thereof and which rockably connects the lower bracket.

Abstract: A stress sensor having a post (6) fixed to or integrated with the surface of an insulation substrate (1) capable of determining the direction and magnitude of a stress applied to the post (6) from changes in the characteristics of a strain gauge (2) made by a stimulus to the strain gauge (2) caused by the stress, wherein a stress to the post (6) can be converted efficiently into changes in the characteristics of the strain gauge (2). Consequently, the stress sensor has a strain gauge (2)-disposed member provided with a locally-easy-to-deform portion where the strain gauge (2) is disposed. The strain gauge (2) is a resistance element (8) and is disposed on the surface of the insulation substrate (1), the insulation substrate mainly contains a resin material, and the easy-to-deform portion is preferably a thin-wall portion (7).

Abstract: A printed circuit board (PCB) having an integrated strain gage. In one embodiment, a PCB includes a component footprint suitable for mounting an electronic component. A strain gage is integrated into the PCB in a location under the component footprint. The strain gage includes at least one electrical conductor that is accessible for resistance measurements.

Abstract: The invention relates to a precision load cell with an elastic body comprising a base end, a load or force receiving part and two or more beams connecting said base end and said load or force receiving part. At least one of the beams constitutes a lever connecting the load or force receiving part and a flexible wall of a sensor cavity placed in the base end. The flexible wall is adapted for undergoing deformation as the result of a displacement of the load or force receiving part through an action of the lever, and the sensor means are adapted for measuring the deformation of the flexible wall or the strain in the flexible wall.

Abstract: A system for sensing the load carried in a structural member by attaching a load cell to a neutral axis of bending. Small deflections along an arc of bending create a desirable signal level via mechanical amplification. A load sensor is adapted for mounting on an axle that deviates from a neutral axis when under a load. The load sensor comprises a reaction portion adapted for mounting on the axle and an active portion adapted for mounting to at least two points along the axle. The active portion has an amplifier arm and at least one sensor element. The sensor element is attached at a first end to the reaction portion and the sensor is attached at its second end to the amplifier arm. At least one strain gauge is mounted on the sensor element. At least one flexion web is attached to the reaction portion and to the active portion.

Abstract: A load cell includes a first element, a second element and a sensor measuring force between the first and second elements along a first axis. In some embodiments, lateral and angular decoupling is provided by the provision of a convex surface between the first and second elements. The convex surface is slidable relative to at least one of the first and second elements in a first direction perpendicular to the first axis.

Abstract: A seat weight sensor for detecting the weight of a seat occupant. The weight sensor has a case mounted between a seat pan and a seat member. One or more strain gauge resistors are mounted in the case. The resistors generate an electrical signal in response to the case being stressed by the weight of the seat occupant. The electrical signal changes as a function of the weight of the occupant. A fastener passes through the seat member, the case, and the seat pan. The fastener secures the sensor between the seat pan and the seat member. The case is adapted to transfer to the strain gage resistor the weight of the occupant up to pre-determined level. The case prevents the strain gage from receiving weight beyond that of the pre-determined level such that the sensor is not damaged by an excessive load. The case also allows the weight sensor to be insensitive to off-axis forces that might otherwise contribute to inaccurate weight readings.

Abstract: A bending beam load cell can be compensated for side-to-side off center load sensitivity by simple electrical adjustments if a pair of shear sensing strain gages are bonded to each bending beam midway between axial strain gages used to measure bending strains. The shear sensing strain gages measure torque on the load cell, and are incorporated in bridge circuits that make it possible to vary the amount of torque sensitivity correction by changing the value of a trimming resistor. The bridge circuits also include circuit components for compensation of front-to-back off center load error and for zero adjustment. Four strain gages on each bending beam can be part of a single composite strain gage element, so the shear sensing strain gages do not add any cost to the load cell. Such a load cell can also be hermetically sealed before any compensation of offset load errors is done.

Abstract: A circuit for measuring mechanical stress impressed on a printed circuit board includes a number of electrically conductive pads formed on at least one outer surface of the printed circuit board, and a resistive material applied in a pattern to the printed circuit board and defining a resistor between first and second ones of the number of electrically conductive pads. The resistive material exhibits an electrical resistance that varies as the resistive material is deformed so that the resistor exhibits an electrical resistance value that varies as a function of mechanical stress impressed on the printed circuit board sufficient to deform the resistive material defining the resistor. Any number of such resistors may be formed on or within the printed circuit board, and any such resistor may form part of an external resistor bridge network configured to monitor changes in its resistance value.

Abstract: An integrated loadcell system, having a loadcell body having a leg connected to a spanning member, the leg having a transducer mounted thereto and a housing coupled to the loadcell body forming a wheatstone bridge circuit with the transducer; where an output of the wheatstone bridge circuit is indicative of a load experienced by the loadcell body.

Abstract: This invention provides a foil strain gauge having a plurality of sensing portions and a plurality of turnup tabs that are connected to each other through respective turnup portions, each turnup portion having an inner side defining a curve with a curvature that changes continuously and gradually.

Abstract: Simple and inexpensive electrical compensation for off-axis and off-center loading sensitivity is possible in compression column load cells comprising a pair of compensation strain gages in series with each of the main strain gages in the load cell. The compensation gages are arranged crosswise to each associated main strain gage, and connected in series with their associated main strain gage. Each set of one main strain gage and two series connected compensation gages form one bridge arm in a strain gage bridge. Two compensation gages meet at each bridge corner, and are shunted by a common trimming resistor. The loading sensitivity compensation works for both conventional fixed axis load cells and Rocker Pin load cells.

Abstract: A pressure transducer suitable for use as a component of a passive occupant detection system installed in a passenger vehicle. The transducer comprises first and second contact members separated by a spacing member. The first contact member has on a surface thereof a primary contact comprising first and second terminations and portions spaced apart in a first direction. The second contact member has on a surface thereof a plurality of secondary contacts crossing and facing the spaced-apart portions of the primary contact through an opening in the spacing member. Application of an increasing force causes the contact members to move toward each other, causing an increasing number of the spaced-apart portions to be shorted out by the secondary contacts and causing an increasing number of secondary contacts to contact the primary contact, thereby altering the electrical path between the terminations of the primary contact.

Abstract: A stress sensor having a post (6) fixed to or integrated with the surface of an insulation substrate (1) capable of determining the direction and magnitude of a stress applied to the post (6) from changes in the characteristics of a strain gauge (2) made by a stimulus to the strain gauge (2) caused by the stress, wherein a stress to the post (6) can be converted efficiently into changes in the characteristics of the strain gauge (2). Consequently, the stress sensor has a strain gauge (2)-disposed member provided with a locally-easy-to-deform portion where the strain gauge (2) is disposed. The strain gauge (2) is a resistance element (8) and is disposed on the surface of the insulation substrate (1), the insulation substrate mainly contains a resin material, and the easy-to-deform portion is preferably a thin-wall portion (7).

Abstract: A pressure transducer suitable for use as a component of a passive occupant detection system installed in a passenger vehicle. The transducer comprises first and second contact members separated by a spacing member. The first contact member has on a surface thereof a primary contact comprising first and second terminations and portions spaced apart in a first direction. The second contact member has on a surface thereof a plurality of secondary contacts crossing and facing the spaced-apart portions of the primary contact through an opening in the spacing member. Application of an increasing force causes the contact members to move toward each other, causing an increasing number of the spaced-apart portions to be shorted out by the secondary contacts and causing an increasing number of secondary contacts to contact the primary contact, thereby altering the electrical path between the terminations of the primary contact.

Abstract: A mechanical deformation amount sensor includes a sensor structure which is formed by a semiconductor substrate or an insulating substrate and integrally includes a deformation portion deformable, when a physical quantity to be detected is applied to the sensor structure, due to the physical quantity and a support portion for supporting the deformation portion, a carbon nanotube resistance element which is provided on the deformation portion so as to be mechanically deformed in response to deformation of the deformation portion and a wiring pattern which is formed in a pattern on the sensor structure so as to be connected to the carbon nanotube resistance element. By applying a voltage to the carbon nanotube resistance element via the wiring pattern, a change of electrical conductivity of the carbon nanotube resistance element upon mechanical deformation of the carbon nanotube resistance element is fetched as an electrical signal.

Abstract: A force transducer for sensing the weight introduced into the mounting of a motor vehicle seat is disclosed. The force transducer includes a force introduction element that is connected to the motor vehicle seat, a force transfer element that is connected to the mounting, and an extension member that is arranged between the force introduction element and the force transfer element. The force transducer makes it possible to accurately determine the weight introduced into the mounting of the motor vehicle seat independently of other influencing forces by the fact that the force introduction element or the force transfer element surrounds the extension member in a plane that extends parallel to the effective direction of the weight, and that at least one wire strain gauge for sensing a shearing force parallel to the weight is arranged on the extension member.

Abstract: Standard attachment fittings for wire rope and chain (WR&C) that are enhanced to also perform load weighing functions in lifting/support or pulling assembly applications. The existing unmodified shape of each typical WR&C fitting provides focused linear strain under tensile or compression loading at determinable points on the fitting body. Affixing a strain gauge element to any of these points will enable accurate load weight measurement eliminating the need for a separate weigh scale and a “thin section” typically required in load sensors to focus load strain and achieve accurate load weight readings. The invention addresses increased WR&C fitting assembly simplicity, preserved structural integrity, improved assembly compactness, reduced cost, enhanced safety and maintenance of the original application functions of the standard attachment fittings while enhancing the said fittings with weighing function capability.

Abstract: A load sensor hardly causing error in weight measurement even when the environmental temperature of the load sensor varies, and a seat weight measuring apparatus using the load sensor. The sensor includes a plurality of strain gauges form a bridge circuit. The strain gauges forming the bridge circuit are attached to the front and back surfaces of a base plate at substantially the same location. Portions of a flexible substrate, on which the strain gauges are formed, are folded and adhered to the back of the sensor plate with adhesive. The bridge circuit formed by the strain gauges compensates for the variation in resistance among the strain gauges generated due to the temperature distribution of the base plate, resulting in little or no variation in output.

Abstract: A load detection structure for a vehicle seat provided with a pair of spaced-apart slide rail devices, wherein a strain block element with a strain gauge is provided on a lateral wall of an upper rail of each of the two slide rail devices. A vertically elongated hole is formed in that lateral wall. The strain block element has a movable end portion and a securing portion fixedly secured to the upper rail lateral wall. A pair of spaced-apart pendent link pieces are provided between the seat and the strain block element, such that the movable end portion of strain block element is connected with the seat via those two spaced-apart pendent link pieces and a connecting pin that passes slidably through the vertically elongated hole, so that the strain block element is delectable in substantially a vertical direction within the vertical limit range defined by the vertically elongated hole.

Abstract: A load cell 1 includes a strain body 2, a bridge circuit and a coating film 10. The bridge circuit is formed of a strain gauge 7 arranged on the strain body 2. The coating film 10 is formed on the strain body 2, covers at least a portion of the strain body 2 attached to a member made of a metal material dissimilar to the strain body and a strain occurring portion of the strain body 2 except for a portion to be attached to the strain gauge 7, includes a coating layer made of resin having a glass transition temperature of 40° C. or more, and has an electrical insulating property.

Abstract: The invention proposes a sensor element (5) for detecting a physical measurement variable such as a pressure, a temperature, a capacitance, or a gap width between two bodies (10, 20) that move in relation to each other during operation and experience high tribological stress. In certain areas between the surfaces of the bodies (10, 20) that move in relation to each other, in a surface region of at least one of the bodies (10), a sensitive layer (13, 30), in particular a sensor segment (13), is provided, which is separated from the body (10) by an insulation layer (12).

Abstract: A load detection structure in a vehicle seat having a slide rail device provided therewith, which basically comprises a generally oblong block member having a rigid yet resiliently deformable property and a strain gauge attached tight thereon. The block member extends along a part of the slide rail device, such that the deflectable portion thereof is operatively connected with the vehicle seat, while the base portion thereof is fixedly connected with that part of the slide rail device. Hence, a load applied to the seat causes deflection of the deflectable portion of block member, in response to which, the strain gauge detects an amount of such deflection and determines a weight of occupant on the seat.

Abstract: Brake pressure indication apparatus in a vehicle includes a plurality of red L.E.D.s arranged in a ladder-like configuration. The L.E.D.s illuminate progressively in response to brake pressure. As brake pressure is increased, more L.E.D.s illuminate. Brake pressure may be sensed in either of two ways, such as movement of the brake pedal or the expansion of a flexible brake hose.