5 results about "Inverse magnetostrictive effect" patented technology

The invention discloses a damage detection device for an angle steel main material of a power transmission tower, and relates to a damage detection device. The invention aims to solve the problems of low detection efficiency, high cost and high omission ratio when the existing angle steel main material is detected. A magnetic conductivity probe, an ultrasonic flaw detection probe and a pressure sensor are integrated to cooperatively work to form a three-dimensional detection system of surface stress detection, internal flaw detection and pressure calibration; the magnetic conductivity probe detects stress distribution of an angle steel main material through an inverse magnetostrictive effect, and accurately identifies a local strain high-risk area under a cyclic load; early warning is provided for fatigue crack initiation; the ultrasonic flaw detection probe penetrates through the metal surface by using high-frequency sound waves to carry out deep scanning on a high-risk area and detect defects such as internal cracks and air holes, so that full-dimensional damage identification from the surface to the inside is realized; the pressure sensor calibrates the attaching state, and it is ensured that the attaching pressure of the magnetic conductivity probe and the measured surface is consistent. The invention belongs to the technical field of electric iron tower damage detection.

The application discloses a magnetostrictive ultrasonic tool holder and a method for realizing amplitude control. The method utilizes the inverse magnetostrictive effect of magnetostrictive material, and through a driving and self-sensing module arranged outside the magnetostrictive transducing material, the actual output amplitude of the system can be obtained in real time during processing without additional sensors or optical equipment. The method effectively overcomes the defects of relying on laser measurement and only being able to monitor no-load, and supports dynamic amplitude monitoring in the processing state. The magnetostrictive ultrasonic tool holder provided by the embodiment of the application has simple structure, is easy to implement, and can reflect the cutting state monitoring of the actual output state of the system in real time during processing, thereby improving the stability of the output of the ultrasonic processing system and the reliability of the processing process.

[Problem] To provide a vibration power generation device capable of improving power generation capability and having stable power generation performance, an energy conversion member constituting the vibration power generation device, a force sensor device having the energy conversion member, and an actuator. [Solution] An energy conversion member (1) is formed by joining a solid soft magnetic material (2) and a solid magnetostrictive material (3). The vibration power generation device (10) is configured so as to generate power by the inverse magnetostrictive effect of the magnetostrictive material (3) generated by the vibration of a vibration part (13) comprising the energy conversion member (1). This force sensor device is provided with a force detection unit that detects a change in magnetization caused by the inverse magnetostrictive effect of a magnetostrictive material when a sensor unit comprising an energy conversion member (1) is deformed, and determines a force acting on the sensor unit on the basis of the change in magnetization. The actuator (20) is configured so as to vibrate a vibrating part (13) comprising the energy conversion member (1) by using the magnetostrictive effect of the magnetostrictive material (3).

The invention provides a magnetostrictive sensor for a power transmission conductor and a detection device. The magnetostrictive sensor comprises a silicon steel yoke, at least one pair of permanent magnet assemblies, a support and an excitation coil. The silicon steel yoke is in a strip shape, the pair of permanent magnet assemblies are fixed at intervals in the length direction of the silicon steel yoke, and different magnetic pole ends of the two permanent magnet assemblies are oppositely arranged. The support is fixed on the silicon steel yoke and located between the two permanent magnet assemblies, the excitation coil is wound on the support in the length direction of the silicon steel yoke, a C-shaped groove deviating from one side of the silicon steel yoke is formed in the support, and the C-shaped groove is formed in the length direction of the silicon steel yoke so that the C-shaped groove can be attached to and close to the power transmission wire from the single side. The permanent magnet assembly induces an axial static bias magnetic field in the power transmission conductor and acts on the power transmission conductor together with a pulse dynamic magnetic field excited when high-frequency pulse current is introduced into the excitation coil, longitudinal modal ultrasonic guided waves are excited based on the inverse magnetostrictive effect, and the returned ultrasonic guided waves are received based on the positive magnetostrictive effect to detect the power transmission conductor.

A load sensor and load detector for detecting the weight of tiny substances such as viruses or bacteria and includes a resonance generator causing a vibrating unit to resonate, a load sensor, and a voltage detector that detects change in induced electromotive force in a pick-up. The load sensor includes the vibrating unit, pick-up, and a substance adsorbent. The vibrating unit includes a magnetostrictive element capable of resonating. The pick-up generates an induced current using inverse magnetostrictive effect of the magnetostrictive element resulting from the vibrating unit vibrations. The substance adsorbent is provided at the vibrating unit, is composed of an antibody to viruses or bacteria and at least partially covers the vibrating unit. The pick-up is composed of a coil with the vibrating unit arranged inside the coil. The vibrating unit is formed by bonding the magnetostrictive element and a soft magnetic body to each other.