160 results about "Piezodorus" patented technology

The invention discloses a water shooting pressure measurement sensor. The sensor mainly comprises a piezocrystal assembly and an amplifying circuit, wherein the amplifying circuit is arranged in a shell; the piezocrystal assembly is connected with the amplifying circuit through a connecting lead; the amplifying circuit is connected with a signal output cable; the piezocrystal assembly is coated in sound-transparent silicone rubber by an epoxy resin; a graphite layer is coated on the external surface of the sound-transparent silicone rubber; the amplifying circuit is coated by an insulated tape and is packaged in the shell by elastic silicone rubber; one end of the shell is connected with a top cap; the output cable passes through the top cap to be connected with the amplifying circuit; and a screw for fixing the signal output cable is arranged on the shell. The sensor has a simple structure, cannot be easily shot and damaged by explosive products, and can be used for measuring water shooting pressure in a complex environment; and the output cable is reliably connected.

A mesofluidic reactor performs a chemical reaction of a starting material. A liquid phase starting material is introduced into a spraying head equipped with an ultrasound generating piezoelectric crystal unit. An inert/reagent gas feeds into the spraying head, connected to a reactor tube arranged within a thermally insulated multi-zone heating unit. For solid phase, an inert/reagent gas is introduced into a solids container connected to a spraying head equipped with an ultrasound generating piezoelectric crystal unit. The spraying head connects to a reactor tube arranged within a thermally insulated multi-zone heating unit. In either case, a reactor tube outlet connects to a cooled product trap to collect conversed substances. The spraying head generates a particle size distribution with nano and micro sized particles for the liquid phase and nano, micro or larger particles for the solid phase. The inert/reagent gas is preheated over the piezoelectric crystal unit's surface.

The invention discloses a piezoelectric composite film and a preparation method thereof. The method comprises the following steps: a pre-piezoelectric composite film is prepared, and the pre-piezoelectric composite film comprises a substrate, an isolation layer and a piezoelectric crystal film layer which are stacked in sequence; an ion implantation process is performed on the piezoelectric crystal film layer, and implanted ions penetrate through the piezoelectric crystal film layer and stay in the isolation layer so as to enable the polarization direction of an area, where the implanted ionspenetrate through, of the piezoelectric crystal film layer to be reversed; and an annealing process is performed on the pre-piezoelectric composite film after the ion implantation process to obtain the piezoelectric composite film.

The invention relates to a piezoelectric crystal element and belongs to the field of crystal elements. The piezoelectric crystal element comprises a piezoelectric crystalline material (1), an electrode layer (2) and a lead (3). A chemical formula of the piezoelectric crystal material is A3+xB1+yAl3+zSi2+mO14+n, wherein x is more than or equal to -0.2 and less than or equal to 0.2; y is more than or equal to -0.2 and less than or equal to 0.2; z is more than or equal to -0.2 and less than or equal to 0.2; m is more than or equal to -0.2 and less than or equal to 0.2; n is more than or equal to -1.4 and less than or equal to 1.4; A is Ca, Sr or combination of the two elements; and B is one of Ta, Nb or Sb, or combination of more of the three elements. The maximum service temperature of the piezoelectric crystal element can reach 1,000 DEG C; and the piezoelectric crystal element has the characteristics of large high temperature electrical resistivity, large piezoelectric coefficient, large electro-mechanical coupling factor, no phase change from the room temperature to a melting point, low price and the like.

There is provided a meter for measuring the molecular weight of a gas, the meter comprising a housing having an inlet and an interior for receiving said gas to be measured, a sensor assembly comprising a high-frequency planar piezoelectric crystal oscillator located within said housing so that, in use, the piezoelectric crystal oscillator is in contact with said gas, said sensor assembly being arranged: to drive the piezoelectric crystal oscillator such that the piezoelectric crystal oscillator resonates at a single resonant frequency, to measure said single resonant frequency of said piezoelectric crystal oscillator to determine the density of gas, and to determine from the density, determined or pre-determined pressure of the gas and determined or pre-determined temperature of the gas, the molecular weight of the gas.

The invention belongs to the technical field of functional composite materials, and particularly relates to an all-organic metal-free perovskite cement-based piezoelectric material, a preparation method and application. The composite material is prepared by dispersing organic metal-free perovskite piezoelectric crystals and cement into a PVDF-based piezoelectric material according to a certain proportion. On the one hand, the composite material is excellent in piezoelectric property, high in toughness and good in compatibility with a concrete material, and the problems that an existing cement-based piezoelectric material is high in brittleness and poor in overall bonding performance with a concrete structure are solved. And on the other hand, the composite material does not contain metal,especially lead, is little in pollution, and has excellent environmental harmony. The material can be used for preparing sensors of concrete building structures in civil engineering and traffic engineering, the prepared sensors are high in sensitivity and sensing precision, and potential safety hazards are reduced.

A cystotome device that includes a cystotome loop utilized to ablate one or more cataracts and a shaft, the cystotome loop coupled to a first end of the shaft and a shaft connection housing coupled to a second end of the shaft. The cystotome device also includes a hand piece body, a first end of the hand piece body coupled to the shaft connection housing, wherein the hand piece body is grasped by a user to maneuver and position the cystotome device. The cystotome device also includes one or more piezoelectric crystals disposed within the hand piece body, the one or more piezoelectric crystals produces ultrasonic waves directed and applied to the one or more cataracts and a power supply cord coupled to the second end of the hand piece body, the power supply cord providing an electrical conduit of electrical power to power the one or more piezoelectric crystals.

The invention relates to the technical field of machining equipment, and discloses a rotary wear experiment device for bushing machining, which comprises a mounting base and a piezoelectric crystal, wherein a fixed shaft is fixedly connected to the front surface of the mounting base, a first electromagnet is fixedly connected to the interior of the fixed shaft, and traction springs which are uniformly distributed are fixedly connected to the outer side of the fixed shaft. According to the rotary wear experiment device for bushing machining, when the outer side of the bushing is worn, the bushing is stressed between the limiting clamping block and the rotary sleeve shaft to be unbalanced, the traction spring is loosened, and the limiting clamping block is ejected out, so that the mounting insertion shaft is driven to be ejected out, and the piezoelectric crystal is pressed to generate current which is transmitted to the second electromagnet through the current amplifier; the second magnet block is pushed rightwards along the long sliding groove, so that when the dielectric plate moves to the position between the positive plate and the negative plate, the control circuit is cut off,testing is finished, the control circuit is electrically connected with the timer, the wear-resistant time limit can be recorded, the testing precision is high, and data can be conveniently recorded.

The invention relates to the technical field of kitchen appliances, and discloses a pot cover capable of preventing boiling overflow. The pot cover comprises a pot body and a cover body; fixing framesare fixedly connected to the two sides of the inner wall of the cover body, supports are fixedly connected to the two sides of the top of the inner wall of the cover body, piezoelectric crystals arefixedly connected to the bottoms of the supports, a vibrating membrane is fixedly connected to the bottoms of the fixing frames, and the upper surface of the vibrating diaphragm is fixedly connected with a striking rod. According to the pot cover capable of preventing boiling overflow, heat waves generated in the pot body drive the vibrating diaphragm to vibrate, the vibrating diaphragm drives thestriking rod to beat the piezoelectric crystals to generate current, the piezoelectric crystals energize the electromagnet to generate magnetism, the electromagnet pushes the electric contact downwards through the magnetic characteristic, and the electric contact makes contact with the conductive point; and then the current generated on the piezoelectric crystal connected with the electric contact can be transmitted to the conductive point, and the cold air can enter the pot body through the cooperative use of the conductive point, the telescopic rod and the cover plate, so that the anti-overflow effect is achieved.

A fixing anti-loosening device for a PVC new material relates to the technical field of new materials and comprises a component, a piezoelectric crystal is fixedly connected to the inner wall of the component, first springs are fixedly connected to two sides, close to the piezoelectric crystal, of the inner wall of the component, and collision balls are fixedly connected to the inner sides of thefirst springs. A sliding groove is formed in the inner wall of the component, second springs are fixedly connected to the inner walls of the two sides of the sliding groove, sliding blocks are fixedlyconnected to the inner sides of the second springs, and dielectric plates are fixedly connected to the middles of the sliding blocks. According to the fixing anti-loosening device for the PVC new material, through cooperative use of the electromagnet and the clamping block, when a host is used, the electromagnet is in a power-on state at the moment, the clamping block moves rightwards under the repulsion effect of the electromagnet and the magnetic block, the clamping block and the clamping groove are clamped together, and at the moment, the component and the shell are relatively and fixedlyconnected together; therefore, the effect of improving the stability of the part is effectively achieved, and the anti-loosening effect is effectively guaranteed.

The invention provides a piezoelectric type single injection measuring instrument. A cavity is arranged in a single injection measuring instrument body, a piezoelectric crystal test module is arranged in the cavity, the piezoelectric crystal test module is in signal connection with a data acquisition control module through a data cable, one side of the single injection measuring instrument body is provided with an oil drainage channel, the cavity communicates with the oil drainage channel, and an oil drainage valve is installed in the oil drainage channel. An oil atomizer installation table is installed above the single injection measuring instrument body, the cavity communicates with the oil atomizer installation table through an oil inlet channel, pressing screws and an oil atomizer installation adapter are installed above the oil atomizer installation table, and an oil atomizer to be tested is inserted into the upper portion of the oil atomizer installation adapter. The oil atomizer installation adapter is located between the two pressing screws. According to the piezoelectric type single injection measuring instrument, the oil atomization rule of the oil atomizer can be measured more accurately, experimental test data do not need to be collected through a sensor, and measurement errors are reduced.

The invention relates to the technical field of precision instruments, and discloses a conveying device for improving the stability of the precision instruments. The conveying device comprises a conveying box, wherein a containing groove is formed in the bottom of the inner wall of the conveying box, and first springs are fixedly connected to the top of the inner wall of the containing groove; andthe tops of the first springs are fixedly connected with a movable block penetrating through the containing groove and extending to the inner wall of the conveying box, a movable cavity is fixedly connected to the lower surface of the containing groove, an air bag is fixedly connected to the bottom of the containing groove, fixing sleeves are fixedly connected to the outer side of the movable cavity, and baffles are fixedly connected to the inner walls, close to the inner sides, of the fixing sleeves. According to the conveying device for improving the stability of the precision instruments,elastic pieces are driven to vibrate through vibration of the conveying box, the elastic pieces drive beating blocks to operate, the beating blocks knock piezoelectric crystals, the piezoelectric crystals generate current, the current enables electromagnets to be powered on, and the electromagnets pull magnetic blocks to drive the air bag to expand outwards according to the heteropolar attractionprinciple; and through cooperative use of the the movable block, the effect that the precision instruments are fixed in the conveying box is achieved.

The invention discloses a self-powered method of a train platform based on multiple piezoelectric crystals. The method comprises the following steps that S1, when a platform freight trolley transportsgoods on a pressing plate with a power supply mechanism laid on a platform body, the pressing plate generates bearing force perpendicular to the ground and parallel to the ground due to pressure andfriction force; S2, the generated bearing force perpendicular to the ground and the generated bearing force parallel to the ground are transmitted to a power supply mechanism; S3, the piezoelectric plate is driven to vibrate repeatedly through an arranged elastic mechanism, so that the guide rod stretches out and draws back periodically in the sleeve; S4, the spring and the guide rod drive the piezoelectric plate to move, so that the piezoelectric plate moves back and forth, mobile charges are formed in piezoelectric ceramics on the piezoelectric plate, and current is generated; S5, the charges are conveyed to the first rectifier through a wire connected with the piezoelectric plate, the negative charges are conveyed to the second rectifier, and the charges are collected through the collector; and piezoelectric materials are reasonably utilized on the platform, electric energy generated by the piezoelectric materials is collected and utilized, and energy is effectively saved.