Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

69 results about "Clamper" patented technology

A clamper is an electronic circuit that fixes either the positive or the negative peak excursions of a signal to a defined value by shifting its DC value. The clamper does not restrict the peak-to-peak excursion of the signal, it moves the whole signal up or down so as to place the peaks at the reference level. A diode clamp (a simple, common type) consists of a diode, which conducts electric current in only one direction and prevents the signal exceeding the reference value; and a capacitor, which provides a DC offset from the stored charge. The capacitor forms a time constant with the resistor load, which determines the range of frequencies over which the clamper will be effective.

Plate clamper platform for falling weight impact test, and impact speed measurement method

The invention discloses a plate clamper platform for a falling weight impact test, and an impact speed measurement method. The plate clamper platform comprises a clamper structure, a supporting lifting structure and a laser sensor, wherein the clamper structure comprises a plate clamping device, a multi-angle rotation device and a clamper bottom plate, the multi-angle rotation device comprises wall plates, wall plate bolts and a bottom plate bolt, each wall plate is provided with a central hole and two arc-shaped grooves, the two arc-shaped grooves are symmetrically arranged relative to the central hole, clamping plates can rotate along the arc-shaped grooves after the wall plate bolts are completely loosened, the supporting lifting structure comprises a platform and a lifting driving device, the clamper bottom plate can rotate by adopting the bottom plate bolt as the center and can slidably move along a straight strip hole, and the laser sensor is arranged below the weight tray positioned on the periphery of a hammer head. With the plate clamper platform and the impact speed measurement method of the present invention, the composite material plate specimen can be tightly clamped, the multi-angle impact on the specimen can be achieved, and the speed change during the drop hammer falling and impact process can be real-timely measured.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Level shifter

The invention discloses a level shifter which comprises an output end, a first input end, a second input end, a latch circuit, a level overturning pull-down circuit and a voltage clamping circuit. Thelatch circuit comprises a first PMOS tube, a second PMOS tube, a first NMOS tube and a second NMOS tube. The voltage clamping circuit comprises a first clamping device, a second clamping device, a third NMOS tube, a fourth NMOS tube, a fifth PMOS tube and a sixth PMOS tube. The level overturning pull-down circuit comprises a fifth NMOS transistor and a sixth NMOS transistor; the first clamping device is used for clamping the voltage of the grid electrodes of the fifth PMOS tube and the sixth PMOS tube; the second clamping device is used for clamping the voltage of the grid electrodes of the third NMOS tube and the fourth NMOS tube. Under the condition that the ground level of the high-voltage driving signal is changed, level conversion is completed at high speed and low power consumption,and the cost is low. A gate oxide layer of a transistor device in the level shifter can be protected from being broken down through the voltage clamping circuit, and the high voltage of the output end is isolated; zero static power consumption and rapid level overturning are achieved through the latch circuit and the level overturning pull-down circuit, and high driving capacity is achieved.
Owner:WILL SEMICON (SHANGHAI) CO LTD

Apparatus and method for winding electrode assembly

The present invention relates to an apparatus and a method for winding an electrode assembly which forms a lithium ion secondary battery or a capacitor, and more particularly to an apparatus and a method for winding the electrode assembly that is clamped by a clamper thereby preventing disengagement between the electrode assembly and a winding part and causing stable winding so as to improve operation efficiency and productivity. For this purpose, the apparatus for winding the electrode assembly which forms the capacitor and secondary battery is characterized by comprising the following components: a clamp part which is provided with a first clamper and a second clamper that are formed oppositely and is provided with a first elastomer that can cause the first clamper and the second clamper to deviate with a preset distance; the winding part which is provided with a first winding roller formed outside the first clamper and a second winding roller formed outside the second clamper; a clamper driving part which compresses the first elastomer for causing the first clamper and the second clamper to cling with each other and fastens an end of the electrode assembly provided therebetween; and a winding driving part which causes the first winding roller and the second winding roller to outside part with a preset distance through connecting the second elastomer with the first winding roller and the second winding roller.
Owner:李癸卨

Rolling device and method

The invention relates to a rounding device which can be used to round a plate-shaped or a slice-shaped work piece, including a fixture, a rounding part, a drive device and a machine table. The fixture comprises a first fixture and a second fixture which is arranged oppositely to first clamper, the fixtures are used to clamp an awaiting work piece to be rounded. The rounding part comprises a grinding surface which is used to round the awaiting work piece to be rounded. The drive device comprises a transmission device, and a first drive device and a second drive device which are connected with the transmission device. The first drive device is used to drive the transmission device and the second drive device is also connected with the work piece to be rounded, so as to adjust the distance between the rounding part and the awaiting work piece to be rounded, drive the self-rotation of the rounding part, and drive the the rounding part rotating around the fixture axis. The machine table is used to place the fixture, the drive device and the rounding part. The invention also provides a method for rounding a work piece. The rounding device of the technical proposal does not need to change grinding wheels of different sizes when rounding a work piece, thereby improving the producing efficiency and reducing the cost.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1

Device and method for carrying out stress corrosion experiment in high-temperature liquid-phase corrosion environment

PendingCN111504801AImplement stress corrosion experimentsAccurate and controllable stress corrosion testMaterial strength using tensile/compressive forcesFluid phaseEngineering
The invention discloses a device for carrying out a stress corrosion experiment in a high-temperature liquid-phase corrosion environment. The device comprises a universal testing machine and a stresscorrosion experiment box clamped with the universal testing machine through a clamper; the stress corrosion experiment box comprises a double-layer glass cylinder, and an upper plug and a lower plug which are hermetically connected with the double-layer glass cylinder; an upper plug sample through hole and a condensing device through hole matched with the condensing device are formed in the upperplug, a lower plug sample through hole is formed in the lower plug, and the upper plug sample through hole and the lower plug sample through hole are connected with the stress corrosion experiment sample in a sealed mode. Besides, the invention also discloses a stress corrosion experiment method, and the method comprises the following steps: loading a stress corrosion experiment sample and corrosive liquid into the stress corrosion experiment box by using a universal testing machine to obtain the loaded experiment sample and data. According to the invention, the universal testing machine is prevented from being contacted with corrosive liquid, a stress corrosion experiment is carried out in a high-temperature liquid-phase corrosion environment, and accurate loading and real-time observation can be realized.
Owner:西安稀有金属材料研究院有限公司

Micro current detection circuit, micro current switching circuit

The invention relates to a microcurrent detection circuit and a microcurrent switch circuit. The microcurrent detection circuit comprises a sampling resistor, one end of the sampling resistor is connected with a detection end of a recognition circuit and a detected circuit, the other end of the sampling resistor is connected with power supply and a clamper circuit, the recognition circuit is connected with the clamper circuit; both the recognition circuit and the clamper circuit comprise a triode, the triodes in the recognition circuit and the clamper circuit have the same model, an emitter bias voltage of the triode in the clamper circuit equals to the supply voltage minus the clamper voltage, an emitter bias voltage of the triode in the recognition circuit equals to the detection end voltage minus the clamper voltage; the clamper voltage is a voltage at a connection point of the recognition circuit and the clamper circuit. The recognition voltage of the recognition circuit is around 0.2V, therefore, the microcurrent detection circuit can detect mA stage current which flows through the sampling resistor; in the microcurrent switch circuit, the microcurrent detection circuit is connected with a switch circuit; the switch circuit is controlled according to the detected current to realize circuit switch.
Owner:王红艳

Electric wire torsion testing machine

The present invention discloses an electric wire torsion testing machine, which comprises a rack, wherein the rack is provided with a control system, a transmission system and plural groups of test assemblies, the test assembly comprises a rotation disc, a clamper, a transmission assembly and a regulation assembly, the rotation disc is arranged on the rack and is matched with the transmission system through the transmission assembly, the clamper is arranged on the rotation disc, the front end of an electric wire to be tested and the clamper are matched, and the rear end of the electric wire to be tested and the regulation assembly are matched. According to the present invention, the clamper is driven by the rotation disc so as to make the front end of the electric wire to be tested be continuously subjected to the repeated torsion test along with the rotation disc, such that the electric wire torsion testing machine is suitable for TUV, VDE, UL and other highly flexible electric cables; and the bending point length and the clamping point length can be regulated through the clamper and the regulation assembly, such that the repeated torsion test can be performed on the samples having other specifications through the electric wire torsion testing machine of the present invention, the application range is wide, and the electric wire torsion testing machine is suitable for quality supervision industry, metal industry, machinery industry, electric cable wires, steel wire ropes, and other manufacturers.
Owner:苏州拓博机械设备有限公司

High-temperature tensile test fixture for structural simulation parts with online observation and full strain pick-up

The present invention relates to a clamper for carrying out tensile test on a structure simulation member under a high temperature condition. The whole clamper comprises an upper clamper and a lower clamper, wherein the main bodies of the upper clamper and the lower clamper are rectangular parallelepiped plate type chucks, the chuck is made of a high-temperature alloy material, the lower portion of the upper chuck is provided with a dovetail type clamping groove, the upper portion of the lower chuck is provided with a clamping groove adapted to the geometric shape of a to-be-researched structure simulation member, and the upper chuck and the lower chuck are respectively provided with a hole for installing the clamper on the outside-furnace clamper of a tensile test machine. According to the present invention, the high-temperature tensile test clamper is used for the high-temperature heating furnace with the observation window so as to meet the online observation and full-strain information picking of the structure simulation member; and the upper chuck and the lower chuck are subjected to asymmetrical structure design, wherein the upper chuck has the large size in the width direction compared to the lower chuck, the size of the clamping groove is correspondingly increased, and the clamping groove of the lower chuck is designed to be adapted to the geometric shape of the to-be-researched structure simulation member, such that the mechanical properties of different parts made of various composite material can be tested.
Owner:BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products