7 results about "Piezoelectric quartz" patented technology

The utility model provides a gold electrode piezoelectric quartz crystal humidity sensor, which relates to the technical field of humidity sensors and comprises a heat insulation shell, a humidity sensor body is fixedly mounted in the heat insulation shell, an air cavity is arranged in the heat insulation shell, and a connecting wire is fixed at the tail end of the heat insulation shell. A protection assembly is installed on the surface of the connecting wire and comprises an installation box, the installation box is fixed to the surface of the connecting wire, eight sets of drying cylinders are installed in one end of the installation box at equal intervals, the drying cylinders are filled with drying cotton strips, and an air inlet pipe is arranged at the position, corresponding to one set of drying cylinders, of the outer side of the installation box. Compared with the prior art, the humidity sensor has the advantages that the protection assembly is communicated with the heat insulation shell, air flow around the humidity sensor is achieved, the humidity sensor is dry, the temperature is reduced, meanwhile, the gold electrode is prevented from being corroded by wet gas, and the humidity sensor body in the heat insulation shell is well protected.

The utility model provides a welding support device for processing a piezoelectric quartz crystal resonator, which belongs to the technical field of resonator processing, and comprises a fixed seat, a mounting frame, a support frame, an adjusting and fixing assembly, a cooling assembly and a welding assembly, the mounting frame is fixedly arranged at the upper end of the fixed seat, the support frame is fixedly arranged above the mounting frame, and the adjusting and fixing assembly is fixedly arranged above the cooling assembly. The welding assembly is arranged on the supporting frame, and the adjusting and fixing assembly and the cooling assembly are arranged on the mounting frame. According to the welding supporting device for machining the piezoelectric quartz crystal resonator, the elastic supporting piece is matched with the rotating motor and the rotating disc, the welding supporting device can adapt to resonators of different sizes and shapes, rapid and accurate fixing and convenient position adjusting are achieved, and welding precision, stability and product consistency are guaranteed. The cooling assembly driven by the power pump can timely use cooling liquid to dissipate heat of the resonator in the welding process, the performance is prevented from being damaged by high temperature, the product stability and reliability are effectively improved, and the production requirement is met in an all-around mode.

The application discloses a piezoelectric quartz vehicle load dynamic monitoring system and method based on visual identification and belongs to the technical field of vehicle dynamic weighing. The system comprises an image information data acquisition module, a charge signal data acquisition module, a database, a model management module, a real-time monitoring module and a warning module. The image information data acquisition module is used for acquiring image information data. The charge signal data acquisition module is used for acquiring charge signal data, calculating vehicle axle load and vehicle estimated total load. The database is used for storing historical data. The model management module is used for establishing a regional error analysis model and analyzing the influence of errors of each monitoring area on vehicle load dynamic monitoring results. The real-time monitoring module is used for outputting current vehicle estimated total load results. The warning module is used for real-time warning of overweight vehicles. The application compensates for errors of each monitoring area, thereby improving the weighing precision of vehicle load dynamic monitoring.

The application discloses an aero-engine bearing inner ring passive temperature measurement system and method, and relates to the technical field of aero-engine temperature measurement.The application uses a high-temperature-resistant composite piezoelectric quartz crystal resonator as a passive resonant temperature-sensitive unit, combines a non-contact coupling reading antenna and an advanced signal demodulation and temperature calculation module, and realizes high-precision, high-reliability and real-time measurement of the temperature of the bearing inner ring under all working conditions.The application not only overcomes the limitations of traditional temperature measurement methods, but also significantly improves the accuracy and reliability of temperature measurement data, provides strong support for the health management of aero-engines, and has the advantages of compact structure, convenient installation, long service life and the like, and has wide engineering application prospects and important economic value.

The application relates to the technical field of sensors, in particular to a packaging method of a piezoelectric quartz sensor and the piezoelectric quartz sensor. The method comprises the following steps: forming a piezoelectric sensor wafer, the piezoelectric sensor wafer comprising a first pin area on a front surface and a second pin area on a back surface, the first pin area and the second pin area being arranged in a diagonal direction; providing a first quartz wafer, forming a first notch on the first quartz wafer at a position corresponding to the first pin area and forming a second notch at a position corresponding to the second pin area, thereby forming a first packaging side part; providing a second quartz wafer, forming a third notch on the second quartz wafer at a position corresponding to the second pin area and forming a fourth notch at a position corresponding to the first pin area, thereby forming a second packaging side part; and bonding the first packaging side part with the front surface of the piezoelectric sensor wafer and bonding the second packaging side part with the back surface of the piezoelectric sensor wafer respectively, so that the bonding mode is adopted to improve the performance of the device.

The invention provides a piezoelectric quartz sensor with automatic sensitivity compensation and a measuring method, and relates to the technical field of sensors.The piezoelectric quartz sensor comprises a sensor shell, a quartz sensing unit, a pre-tightening unit, a signal processing unit and a quartz ring unit, and the quartz ring unit is arranged on the pre-tightening unit in a sleeving mode; the pre-tightening unit applies a pre-tightening force to the quartz ring unit, and the values of the pre-tightening forces applied to the quartz ring unit and the quartz sensing unit are equal; when external force is applied, the quartz sensing unit generates a first electric signal according to the sum of the pre-tightening force and the external force, and the quartz ring unit generates a second electric signal according to the difference between the pre-tightening force and the external force; the quartz ring unit and the quartz sensing unit are electrically connected with the signal processing unit, and the signal processing unit performs differential operation on the first electric signal and the second electric signal to obtain an output signal. And the pre-tightening force is counteracted through differential operation, so that the finally obtained output signal is not influenced by the change of the pre-tightening force, and the sensitivity change caused by the change of the pre-tightening force is automatically compensated.

This invention provides a piezoelectric quartz sensor with automatic sensitivity compensation and a measurement method, relating to the field of sensor technology. The piezoelectric quartz sensor includes a sensor housing, a quartz sensing element, a pre-tightening unit, a signal processing unit, and a quartz ring unit. The quartz ring unit is fitted onto the pre-tightening unit, which applies a pre-tightening force to the quartz ring unit. The pre-tightening forces applied to the quartz ring unit and the quartz sensing element are equal. When an external force is applied, the quartz sensing element generates a first electrical signal based on the sum of the pre-tightening force and the external force, and the quartz ring unit generates a second electrical signal based on the difference between the pre-tightening force and the external force. Both the quartz ring unit and the quartz sensing element are electrically connected to the signal processing unit. The signal processing unit performs a differential operation on the first and second electrical signals to obtain an output signal. By canceling the pre-tightening force through differential operation, the final output signal is unaffected by changes in the pre-tightening force, automatically compensating for sensitivity changes caused by variations in the pre-tightening force.