65 results about "Piezo switch" patented technology

A wireless switch is provided having a twenty-year life energy harvesting arrangement for self-powering a wireless transmitter. The energy harvesting arrangement is implemented in one embodiment using a piezoelectric switch element. A tritium light source and photovoltaic device are used in a second embodiment, while a black light source and photovoltaic device are used in a third embodiment. The energy harvesting wireless switch arrangement of the present invention can be combined, for example, with a vehicle side mirror switch, to reduce the complexity of the wire harness feeding the door. The wireless switch can be located without regard to accessability of a wiring harness or connector.

The invention relates to a piezoelectric switch type valve positioner control method and a piezoelectric switch type valve positioner control system. The system consists of a 4-20mA current source, a current-to-voltage (I / V) conversion circuit, a voltage conversion module, a control signal amplifying and filtering circuit, a feedback signal amplifying and filtering circuit, 2 external analog-to-digital converter (ADC), an ultra-low power consumption singlechip, a liquid crystal keyboard module, an electrically erasable programmable read-only memory (EEPROM), a passive crystal, and a piezoelectric valve driven amplifying circuit. The control method comprises the steps of: determining the optimum pulse width modulation (PWM) duty cycle during the self-tuning of parameters; and adopting a five-step switching method with reverse PWM during the control. The piezoelectric switch type valve positioner control method and the piezoelectric switch type valve positioner control system can effectively avoid the overshoot phenomenon during the control of a valve positioner, solve the non-linear problem of an actuating mechanism, and have stronger universal applicability.

A piezoelectric switch for tunable electronic components comprises piezoelectric layers, metal electrodes alternated with the layers and contact pads. Cross voltages are applied to the electrodes, in order to obtain an S-shaped deformation of the switch and allow contact between the contact pads. Additionally, a further electrode can be provided on a substrate where the switch is fabricated, to allow an additional electrostatic effect during movement of the piezoelectric layers to obtain contact between the contact pads. The overall dimensions of the switch are very small and the required actuation voltage is very low, when compared to existing switches.

A functional vehicle component and related methods include a functional leather assembly fixed over a vehicle component. The functional leather assembly includes a leather sheet, a flexible electronic circuit arranged on a first surface of the leather sheet that faces away from the vehicle component to thereby define an outermost surface of the leather sheet, and including a piezoelectric switch that can be actuated to make or break a conductive path in the circuit; and a pigmented coating arranged over the circuit. Upon actuation of the piezoelectric switch to make or break the conductive path in the circuit, the piezoelectric switch provides a haptic signal that indicates the actuation of the piezoelectric switch.

A piezoelectric MEMS switch includes: a base substrate; a diaphragm arranged to oppose the base substrate via a gap; a first piezoelectric drive section constituted by layering a first lower electrode, a first piezoelectric body and a first upper electrode on a first surface of the diaphragm, the first surface being across the diaphragm from the gap; a second piezoelectric drive section constituted by layering a second lower electrode, a second piezoelectric body and a second upper electrode on a second surface of the diaphragm, the second surface facing the gap; a fixed electrode provided on a gap side of the base substrate; and a movable electrode which is fixed to a second piezoelectric drive section side of the diaphragm and opposes the fixed electrode in such a manner that the movable electrode makes contact with and separates from the fixed electrode according to displacement of the diaphragm.

A piezoelectric switch for tunable electronic components comprises piezoelectric layers, metal electrodes alternated with the layers and contact pads. Cross voltages are applied to the electrodes, in order to obtain an S-shaped deformation of the switch and allow contact between the contact pads. Additionally, a further electrode can be provided on a substrate where the switch is fabricated, to allow an additional electrostatic effect during movement of the piezoelectric layers to obtain contact between the contact pads. The overall dimensions of the switch are very small and the required actuation voltage is very low, when compared to existing switches.

A piezoelectric switch includes a piezoelectric element which is electrically connected to a printed circuit board by a pair of wires. A unitary plastic carrier is designed to retain both the piezoelectric element and the printed circuit board fixedly mounted thereon. In turn, the plastic carrier is sized and shaped to be co-axially disposed within the interior cavity of a generally cylindrically-shaped protective housing, wherein the plastic carrier is provided with at least one flexible finger which is configured to snap-fit into engagement within an annular groove formed in the inner surface of the housing so as to retain the carrier in place within the interior cavity. With the carrier fixed in place within the housing, an adhesive spacer disposes the piezoelectric element in contact with the inner surface of a touch plate provided in the housing. Accordingly, in use, the application of a tactile input onto the outer surface of the touch plate in turn causes the approximate center of the piezoelectric element to slightly deform. In response thereto, the piezoelectric element generates an output signal which passes to the printed circuit board. Based on the output signal received, the printed circuit board regulates the state of the piezoelectric switch.

Systems and methods for operating piezoelectric switches are disclosed. A piezoelectric switching system includes a first actuator, a second actuator, and a bias voltage source. The first actuator has a first body electrode, a first gate electrode, and a first contact region. The second actuator has a second body electrode, a second gate electrode, and a second contact region. The first and second contact regions are separated by a gap. The bias voltage source applies a bias voltage to the body electrodes. The bias voltage is lower in magnitude than an actuation voltage for the switch. The gate electrodes receive a switching voltage. The switching voltage causes at least one of the first and second actuators to bend, thereby closing the gap such that the second contact region electrically contacts the first contact region. The difference between the switching voltage and the bias voltage exceeds the actuation voltage of the switch.

A piezoelectric switch includes a piezoelectric element which is electrically connected to a printed circuit board by a pair of wires. A unitary plastic carrier is designed to retain both the piezoelectric element and the printed circuit board fixedly mounted thereon. In turn, the plastic carrier is sized and shaped to be co-axially disposed within the interior cavity of a generally cylindrically-shaped protective housing, wherein the plastic carrier is provided with at least one flexible finger which is configured to snap-fit into engagement within an annular groove formed in the inner surface of the housing so as to retain the carrier in place within the interior cavity. With the carrier fixed in place within the housing, an adhesive spacer disposes the piezoelectric element in contact with the inner surface of a touch plate provided in the housing. Accordingly, in use, the application of a tactile input onto the outer surface of the touch plate in turn causes the approximate center of the piezoelectric element to slightly deform. In response thereto, the piezoelectric element generates an output signal which passes to the printed circuit board. Based on the output signal received, the printed circuit board regulates the state of the piezoelectric switch.

The invention relates to a switch device (10), for switching a user on and off, in particular, a motor or similar in a vehicle, comprising a housing (20), an operating element (30), a switch element (40) and a display (50), wherein the display (50) is arranged on the operating element (30), the switch element (40) may be activated by the operating element (30) and at least one switch signal (117)for a control unit (15,15') may be generated by means of the switch element (40). According to the invention, the switch element (40) is a piezo switch and the piezo switch is arranged such as to generate the switch signal (17) on pushing (31) the operating element (30) into the housing (20).

The invention discloses a piezoelectric on-off valve type jetting dispensing head, and relates to a dispensing device mainly for the quick assembly of electronic chips. The jetting dispensing head is provided with a base, two piezoelectric ceramics, pull rods, a triangular block, a heating block, stop blocks, a nozzle, a firing pin, a flexure hinge and a liquid supply device, wherein the base is provided with the flexure hinge, two piezoelectric ceramics are pre-tensioned on two arms of the flexure hinge respectively through stop blocks, the stop blocks are arranged in the front end of the piezoelectric ceramics respectively, and are fixed on the base by the pull rods and embedded in stop blocks guide groove of the inner frame edge of the base; the nozzle is fixed on the front end under the base; cover plates are arranged on two sides of the base respectively, the rear ends of two cover plates are fixed on two arms of the flexure hinge by bolts, and the triangular block are fixed on the front end of two cover plates; the firing pin is arranged on the front end of the triangular block; the heating block is fixed on the lower part of the base; the liquid supply device is provided with a colloidal runner, an inlet conversion adapter and an inlet hose; and the liquid supply device is arranged on the lower part of the base, a heat-insulating groove is arranged between the base and the liquid supply device, and the colloidal runner is externally connected with the liquid supply device through the inlet conversion adapter and the inlet hose.

A navigation controller for a watercraft enables an operator to safely control the vessel even when in rough seas. A grip member and control head act as an integrated grab bar to be grabbed by a hand of a user and transfer the force to a mount. The grip member is engagable by fingers on the hand of the user for providing a grab bar to the user to resist movement of the body of the user caused by the applied force. The applied force is transferred through the hand of the user to the grip member to the mount to a force transfer member to a structural member to dissipate the applied force in resisting excessive movement of the body of the user caused by the applied force. A navigation controller includes control switches for controlling the operation of the watercraft. A control plate supports the control switches and the control plate with the control switches is configured and dimensioned relative to the grip member to enable a thumb of the user to engage with one or more of the control switches while the fingers remain engaged with the grip member so that the resistance of the applied force to keep the user steady does not cause a unintended activation of one or more of the control switches. A tactile location indicator is disposed on the control plate to provide easy and rapid location indication by haptic feedback. The control switches may include piezo switches to allow use in a severe marine environment that may include prolonged deep immersion, and powerful and prolonged salt spray and pressure washing, enduring conditions that would render a conventional marine joystick inoperable.

The invention relates to a miniature hydrodynamic piezoelectric switch valve which comprises a piezoelectric oscillator, a liquid storage cavity, a driving hole, a flexible valve plug, a valve opening, an inlet, an outlet, a flow passage and driving liquid, wherein the piezoelectric oscillator is arranged at the upper part or the lower part of the liquid storage cavity; the driving hole connected with the liquid storage cavity is formed in the upper part, the lower part or the cavity wall of the liquid storage cavity; the flexible valve plug is arranged on the driving hole and matched with the valve opening; the piezoelectric oscillator, the liquid storage cavity and the flexible valve plug together form a sealed space filled with the driving liquid. The switch valve provided by the invention controls the opening and closing of a valve indirectly by virtue of hydraulic power, can fully utilize the overall deformation of a piezoelectric chip, and has the advantages of high response speed, good cut-off property, high cut-off pressure, low leakage rate and easiness in processing and manufacturing. The piezoelectric driving part and the fluid control part of the switch valve can be separated through a liquid guide tube, and the mounting form is flexible.

A circuit arrangement for an electric appliance, having a control device and a power supply unit connected with an electric current supply connector for providing functional units, which are to be controlled, of the electric appliance with current. A switch is provided on the electric current supply connector for cutting off the power supply unit from the electric current supply connector on a primary side. The switch has a piezo switch which is open in the non-activated state. The circuit arrangement of this invention is used, for example, in connection with electronic household appliances.

The invention relates to a switch device (10), for switching a user on and off, in particular, a motor or similar in a vehicle, comprising a housing (20), an operating element (30), a switch element (40) and a display (50), wherein the display (50) is arranged on the operating element (30), the switch element (40) may be activated by the operating element (30) and at least one switch signal (117) for a control unit (15,15′) may be generated by means of the switch element (40). According to the invention, the switch element (40) is a piezo switch and the piezo switch is arranged such as to generate the switch signal (17) on pushing (31) the operating element (30) into the housing (20).

A head-worn system has one or more illumination, imaging, communication, and / or other controlled elements electrically connected to a switch element (e.g., a piezo switch) positioned on the head-worn system so as to be overlying an area of a wearer's masseter muscle when worn on the wearer's person. The switch element is configured to be activated responsive to clenching of the wearer's jaw. The one or more controlled elements may be arranged to provide directional lighting / imaging from the point of view of the wearer, for example from the area of the wearer's zygomatic bones, when the head-worn system is worn on the wearer's person.

A piezoelectric Micro Electro Mechanical System (MEMS) switch includes a substrate, first and second fixed signal lines symmetrically formed in a spaced-apart relation to each other on the substrate to have a predetermined gap therebetween, a piezoelectric actuator disposed in alignment with the first and the second fixed signal lines in the predetermined gap, and having a first end supported on the substrate to allow the piezoelectric actuator to be movable up and down, and a movable signal line having a first end connected to one of the first and the second fixed signal lines, and a second end configured to be in contact with, or separate from the other of the first and second fixed signal lines, the movable signal line at least one side thereof being connected to an upper surface of the piezoelectric actuator.

The invention relates to an automotive slight-scuffing protection device which comprises an easy-deformed block, a loudspeaker, an automotive brake driver, a touch electric switch and a manual electric switch. The automotive slight-scuffing protection device is characterized in that the easy-deformed block is a soft blocky object which can generate the deformation while in extrusion, the touch electric switch is arranged inside the easy-deformed block, and a plurality of easy-deformed blocks can be arranged out of an automotive shell. After the automotive slight- scuffing protection device is used in an automobile, the easy-deformed block is firstly extruded when the slight scruff of the automobile happens, the touch electric switch is powered on, and the loudspeaker makes an alarming sound so as to enable automotives that collide subsequently to brake urgently; the touch electric switch is powered on if the automotive collides front objects or lateral objects by self, the loudspeaker makes an alarming sound, the brake driver enables the automobile to brake urgently and stop immediately at the same time, and the brake state and a loudspeaker alarming state of the automobile can be relieved after the manual electric switch is manipulated, thereby the invention reduces the scuffing and damage accidents of the automotive.

Systems and methods for operating piezoelectric switches are disclosed. A piezoelectric switching system includes a first actuator, a second actuator, and a bias voltage source. The first actuator has a first body electrode, a first gate electrode, and a first contact region. The second actuator has a second body electrode, a second gate electrode, and a second contact region. The first and second contact regions are separated by a gap. The bias voltage source applies a bias voltage to the body electrodes. The bias voltage is lower in magnitude than an actuation voltage for the switch. The gate electrodes receive a switching voltage. The switching voltage causes at least one of the first and second actuators to bend, thereby closing the gap such that the second contact region electrically contacts the first contact region. The difference between the switching voltage and the bias voltage exceeds the actuation voltage of the switch.

The invention relates to a touch screen, a color film base plate and a manufacture method thereof. The touch screen comprises a base plate, wherein a plurality of first signal lines and second signal lines for forming a plurality of touch sensing areas are arranged on the base plate; the first signal lines are connected with a first piezoelectric switch; the second signal lines are connected with a second piezoelectric switch; and the first piezoelectric switch and the second piezoelectric switch are used for conducting when the touch sensing areas are in touch and are applied with voltage and transferring a voltage signal respectively by the first signal lines and the second signal lines for confirming position coordinates of the touch sensing areas in touch. The invention utilizes the principle that charge is formed on the surface of a film when a piezoelectric film is applied with voltage, adopts structural ways of the signal lines and the piezoelectric switches and has the advantages of simple structure, low cost, high precision, long service life, and the like.

The invention relates to a switch device (10), for switching a user on and off, in particular, a motor or similar in a vehicle, comprising a housing (20), an operating element (30), a switch element (40) and a display (50), wherein the display (50) is arranged on the operating element (30), the switch element (40) may be activated by the operating element (30) and at least one switch signal (117) for a control unit (15,15′) may be generated by means of the switch element (40). According to the invention, the switch element (40) is a piezo switch and the piezo switch is arranged such as to generate the switch signal (17) on pushing (31) the operating element (30) into the housing (20).

The present invention relates to a device for monitoring a gas-insulated high-voltage substation by measuring partial discharges, the substation including an enclosure (11); an electrical field sensor (10) comprising a metal plate (13) attached to the wall of the enclosure (11); a conical metal part (12) closed with a cover at the flared portion thereof, the other end of same extending into the enclosure and opening into a bushing (14) that extends through the metal plate (13) which serves as a back-plane for the conical antenna thus formed; and a connector (15) connected to the bushing (14), which can be used to connect the bushing (14) to a measurement and display device via a coaxial cable.

The invention relates to an electric switch, especially a piezo switch, with optical and / or mechanical feedback of the switching operation. The switch contains at least one switching element, especially beneath a cover panel, which can be activated by means of an activating element. This causes a switching signal to be generated and guided out via electrical contacts. The activating element itself is configured in the form of a passive luminous body consisting of an at least translucent material, which can be illuminated by active luminous means. The mechanical feedback of the switching operation can take place using a vibrator which is activated by the switching operation that has been initiated and conveys a vibrating motion to the luminous body.

A switch assembly includes a base plate and a switch element. The base plate includes a protrusion, a first light emitting diode, a second light emitting diode, a first switch contact, and a second switch contact. The first light emitting diode and the first switch contact are positioned on a first side of the protrusion, and the second light emitting diode and the second switch contact are positioned on a second side of the protrusion. The switch element is movably mounted on the protrusion and contactable with the first switch contact and the second switch contact. The switch element includes a light guiding portion with a first light incident surface positioned above the first light emitting diode, a second light incident surface positioned above the second light emitting diode, and a light emitting surface.

The invention discloses a probing small-sized electrostatic spinning instrument, comprising an ejector tube and a push rod; a piston end of the push rod is mounted on the ejector tube; a piezoelectricswitch is arranged at the top end of the push rod, outside the ejector tube, and a metal piece is arranged on the top surface of the piezoelectric switch fixedly; a battery case and a high-voltage direct-current inverter are fixedly mounted on the outer side wall of the ejector tube, batteries mounted in the battery case supply power to the high-voltage direct-current inverter; the piezoelectricswitch is connected with a battery case through a wire conductor to control a power switch, and a negative pole of the high-voltage direct-current inverter is in electric connection with the metal piece; a needle holder at the bottom of the ejector tube is connected with a spinning nozzle assembly. The electrostatic spinning instrument is of small size, is convenient and portable and is out of limit from the external power supply; the electrostatic spinning instrument is provided with the special-structure spinning nozzle assembly capable of directly probing recess structures directly, therebyrealizing directly spraying nanofiber membrane to insides of deep structures, and having good application prospect.

A hand tool includes a handle and a function end wherein a driving member is rotatably engaged with a through hole defined in the function end so as to output a torque to tighten or loosen an object. A ratchet mechanism including a pawl for engaging with the driving member is connected to the function end and two ends of the pawl member are alternatively in contact with two end walls of a recess for receiving the pawl member. Two detection members are respectively connected to the two end walls of the recess so that when outputting torque, the two ends of the pawl member contact against the two detection members which are piezo-electric switches and electrically connected to a data processing unit and a display unit connected to the handle.

The invention provides a method for performing perturbation simulation on link between Leaf-Spine switches in a network. The method comprises the following steps: disconnecting a link between a Leaf switch and a Spine switch; coupling the Spine switch with a first network card, and coupling the Leaf switch with a second network card; and communicating the first network card with the second networkcard through a server, so that traffics entering from the first network card are entirely forwarded to the second network card through the server, and the traffics entering from the second network card are entirely forwarded to the first network card through the server, wherein abnormal perturbation is generated in the server through first software simulation. The invention further provides a device for performing perturbation simulation on link between Leaf-Spine switches in the network.

A functional vehicle component and related methods include a functional leather assembly fixed over a vehicle component. The functional leather assembly includes a leather sheet, a flexible electronic circuit arranged on a first surface of the leather sheet that faces away from the vehicle component to thereby define an outermost surface of the leather sheet, and including a piezoelectric switch that can be actuated to make or break a conductive path in the circuit; and a pigmented coating arranged over the circuit. Upon actuation of the piezoelectric switch to make or break the conductive path in the circuit, the piezoelectric switch provides a haptic signal that indicates the actuation of the piezoelectric switch.

A method of testing a circuit assembly that includes a piezoelectric switch may include driving a DC current into the piezoelectric switch. The method may further include measuring the time interval it takes to develop a predetermined voltage across the piezoelectric switch and comparing the measured time interval with a first predetermined time interval and a second predetermined time interval. The method may include identifying the circuit assembly as defective when the measured time interval is either less than the first predetermined time interval or more than the second predetermined time interval, and otherwise identifying the circuit assembly is operational.