3 results about "Gmr sensor" patented technology

The present invention relates to a nano- or microparticle comprising a matrix made of or comprising at least one polyvinyl alcohol (PVA), and ferrite dispersed therein, as well as a method for obtaining it. The present invention also relates to the use of these nano- or microparticles for the preparation and implementation of devices capable of being detected by giant magnetoresistance sensors (GMR sensors) as biological diagnostic tools.

Methods of, inter alia, detecting the presence of one or more analytes in one or more query samples include providing one or more sensor that each include biomolecules disposed on a functionalized surface of one or more giant magnetoresistance (GMR) sensors. Modes of operation remove or add magnetic beads from the vicinity of sensor surfaces by interactions with the biomolecules. The methods feature, inter alia, detecting the presence of one or more analytes in one or more query samples by measuring magnetoresistance change of the one or more GMR sensors based on determining magnetoresistance before and after passing magnetic particles over the one or more sensors.

The application discloses a kind of railway vehicle bogie bolt fast inspection device and quantitative evaluation method, belong to railway vehicle nondestructive testing technical field.The device includes array spontaneous leakage magnetic probe, spatial positioning mechanism and signal processing unit.Array spontaneous leakage magnetic probe uses high sensitivity GMR sensor array, picks up high intensity bolt self remanence generated spontaneous leakage magnetic signal, without additional magnetizing device;Space positioning mechanism synchronously records probe position coordinate;Signal processing unit extracts signal peak-peak value, waveform width and other characteristics, combined with CNN-LSTM multi-task deep learning model, output bolt's pre-tightening force retention rate, damage classification result and stress history index.The application does not need external magnetic field, operation is safe and convenient, single bogie detection time is shortened to within 5 minutes, realizes the non-contact, fast, quantitative evaluation of railway vehicle bolt in-service state, provides technical support for railway vehicle digital operation and maintenance.