167 results about "Piezodorus" patented technology

An ultrasonic probe having ultrasonic sensors (e.g., piezoelectric crystals) for measuring the level of liquid within a sealed container and having features that make the probe more reliable and enable more precise liquid level readings as the container nears an empty state. Embodiments include spacing the ultrasonic sensors more closely at the lower end of the probe, offsetting the sensors to enable tighter vertical spacing, matched pairs of sensors for redundancy, and a downward facing sensor located at the lower end of the probe to decrease the minimum liquid level that can be accurately measured by the probe. A sump may also be provided to further decrease the minimum liquid level that can be accurately measured by the probe.

A measuring element formed of a piezoelectric crystal of symmetry class 32 for measuring a force Fz, which acts perpendicularly on the plane x-y and causes a charge accumulation on surfaces of the plane x-y. Applications are measurements in which the transverse forces Fxy orthogonal to the force Fz, which generate an error signal at the measuring element, are expected on the measuring body. The measuring element includes at least four identical measuring element segments having straight edges. In the x-y plane the segments are arranged side by side and spaced apart by narrow gaps at the edges. Together, the segments form the shape of a disc or perforated disc for reducing the interference signals caused by the transverse forces Fxy on the measuring element. The crystal orientations in the x-y plane of all segments are oriented in the same direction or orthogonal to each other.

A method employing a handpiece having at least one set of piezoelectric elements polarized to produce longitudinal motion when excited at the relevant resonant frequency. The piezoelectric crystals are connected to an ultrasonic horn to which a cutting tip is attached. The horn and / or the cutting tip contains a plurality of diagonal slits or grooves. The slits or grooves produce optimized torsional movement in the cutting tip when the piezoelectric crystals are excited at a second resonant frequency. When in torsional mode, material may clog the cutting tip. The present method includes the step of providing a pulse of longitudinal movement of the tip when clogging is detected.

The utility model relates to a multi-dimensional force sensor structure of a parallel rod system, which belongs to the field of sensor measurement. The present invention aims to solve the problem of low precision in obtaining multi-dimensional force caused by the structure of the existing multi-dimensional force sensor. The parallel bar system multi-dimensional force sensor structure of the present invention includes a support platform and a load platform, the load platform and the support platform are connected through a parallel bar system, and the external force on the load platform is completely transmitted to the support platform through the parallel bar system; A micro-displacement sensor for measuring the micro-displacement between the platform and the load platform is arranged, and / or strain gauges are arranged on the strain beams of the parallel bar system, and / or piezoelectric crystals are used as the strain beams. It is mainly used for multi-dimensional force sensors connected in parallel.

A piezoelectric element for an automatic frequency control circuit. The element includes a balance spring formed of a piezoelectric crystal strip, a first electrode connected to the automatic control circuit, and disposed on at least a first side of the strip, and a second electrode connected to the automatic control circuit and disposed on at least a second side of the strip. The first and second electrodes are placed on one portion or over the entire length of the balance spring in a predetermined angular distribution.

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.