6results about How to "High frequency response" patented technology

The application discloses a sheet type integrated platinum film heat flow sensor for a hypersonic shock tunnel, which comprises a glass substrate in a sheet shape, a plurality of platinum thin film lines arranged on the surface of the glass substrate along the width direction of the glass substrate, and silver paste contacts corresponding to the platinum thin film lines arranged on the side edges of the glass substrate and electrically connected with the platinum thin film lines, wherein the end of the silver paste contact away from the platinum thin film line is used for welding a lead wire. The sheet type integrated platinum thin film line resistance sensor has the characteristics of high frequency response of a two-millimeter-diameter thin film sensor. After the thickness of the glass substrate as a sensor bearing substrate is reduced, the sensor can be applied to a particularly thin part of an aircraft for heat measurement, and a measurement point with a gradient range is formed on the glass substrate, so that the aerodynamic heat of the aircraft surface with a certain gradient can be measured.

The utility model provides an anti-fatigue low-friction high-frequency response miniature spring for a pneumatic assembly, and relates to the technical field of miniature springs, the anti-fatigue low-friction high-frequency response miniature spring comprises a spring and an upper fixing sleeve, the middle of the outer side surface of the spring is tightly wrapped with a middle leather sheath, the left and right parts of the outer side surface of the spring are tightly wrapped with side leather sheaths, and a reinforcing core is arranged in the center in the spring. The upper portion of the spring is sleeved with an upper fixing sleeve, the lower portion of the spring is sleeved with a lower fixing sleeve, the upper fixing sleeve and the lower fixing sleeve are the same in structure, the thickness size of the middle leather sheath is half of that of the side leather sheath, the middle leather sheath and the side leather sheath are made of silicon rubber materials, the reinforcing core is made of beryllium copper alloy materials, and the reinforcing core is made of aluminum alloy materials. And the cross section of the reinforcing core is of a circular structure. Abrasion is reduced in the back-and-forth rebounding process of the spring, the fatigue resistance is quite high, sleeving is safer and more stable, compression and rebounding are safer and more stable, and the spring is not prone to slipping in the compression process, higher in frequency response and durable.

The utility model belongs to the technical field of high-temperature pressure testing, and discloses a dynamic static pressure measuring device for high-temperature airflow, which is suitable for dynamic static pressure measurement of turbine inlets, turbine outlets and interstage wall surfaces. Comprising a cylindrical supporting rod, a pressure sensing hole, a dynamic pressure sensor, a pressure measuring channel, a water inlet channel, a water outlet channel, a partition plate, a cavity, a multifunctional positioning block, a fixing thread and a cable. The axis of the pressure sensing hole coincides with the axis of the supporting rod and communicates with the dynamic pressure sensor through the pressure measuring channel. The supporting rod is of a double-layer coaxial structure, the inner layer and the outer layer are divided by a vertically-arranged partition plate to form a water inlet channel and a water drainage channel, the sections of a water inlet and a water outlet are smoothly transited from a cashew nut shape to a round shape, and the flow area is constant. The lower end of the supporting rod is provided with a fixing thread and is matched with a multifunctional positioning block for positioning and fixing with the wall surface of the casing, thereby realizing dynamic static pressure measurement of the wall surface in a 2000K environment.

This invention provides a valve sleeve spiral positioning and guided electro-hydraulic proportional servo valve. The electro-hydraulic proportional servo valve includes a spool valve assembly, an oil port changing plate at the left end of the spool valve assembly, and an electric actuator at the right end of the spool valve assembly. A valve core that can slide in the axial direction is disposed inside the spool valve assembly, and the valve core portion is inserted into the electric actuator. A guide-stage valve sleeve is rotatably connected inside the electric actuator, and the guide-stage valve sleeve is connected to the valve core insertion portion. A guide structure is provided between the valve core insertion portion and the guide-stage valve sleeve. This invention successfully reduces the moment of inertia, enabling the motor to drive the valve core movement with lower torque output. Furthermore, this invention can also reduce the subsequent maintenance costs of the servo valve.

The invention provides a jet servo valve closed magnetic circuit magnetizing device and method and a torque motor deviation adjusting method. The jet servo valve closed magnetic circuit magnetizing device comprises a U-shaped magnetic conducting block (2), a magnetic isolating block (3), a locking screw (4) and a magnetizing limiting block (5). The magnetic steel (1) to be magnetized and the magnetic isolating block (3) are arranged in the U-shaped magnetic conducting block (2); the magnetic steel (1) to be magnetized is positioned at the opening of the U-shaped magnetic conductive block (2); the locking screw (4) is connected with the magnetic isolating block (3) and the U-shaped magnetic conducting block (2) so as to press the magnetic isolating block (3); and all the parts are placed in a magnetizing coil (6) of a magnetizer through a magnetizing limiting block (5). The magnetic performance of the magnetic steel can be brought into full play, the gain of the torque motor is improved, and meanwhile various performance of the servo valve under the large bias condition can be guaranteed.

A concentric annular plasma fuel activation device for the injector rod of a ramjet combustion chamber is provided, comprising a combustion chamber housing (1), an injector rod (2), a flame stabilizer (3), an outer ring low-pressure electrode (4), and an inner ring high-pressure electrode (5). The outer ring low-pressure electrode (4) consists of a circular outer ring body (6), an outer ring fixing rod (7), and an outer ring discharge contact (8). The inner ring high-pressure electrode (5) consists of an inner ring high-pressure terminal (9), an inner ring body (10), and an inner ring discharge contact (11). To achieve insulation between the inner ring high-pressure terminal (9) and the combustion chamber housing (1), a hollow cylindrical inner ring fixing sleeve (12) is designed. A method for activating concentric annular plasma fuel for the injector rod of a ramjet combustion chamber is also provided. This invention addresses the problems of difficult ignition and low combustion efficiency of ramjet combustion chambers under low operating conditions. This invention employs an innovative sliding arc plasma excitation device after the fuel injector rod in the ramjet combustion chamber, which can optimize the working performance of the ramjet combustion chamber over a wide range of incoming flow parameters without the need for an external geometrically adjustable mechanism.