62 results about "Metallic membrane" patented technology

The invention relates to an optical fiber accelerometer and a pipeline leakage sensing system. The optical fiber accelerometer comprises a sensing optical fiber, a first mass block, a metal diaphragm, a second mass block and an integrated shell, a tapering structure is manufactured on the sensing optical fiber, and the tail end of the sensing optical fiber is plated with a high-reflection film; the central part of the metal diaphragm is tightly clamped by the first mass block and the second mass block; and the edge part of the metal diaphragm is fixed together by the lower shell and the upper shell of the integrated shell. The pipeline leakage sensing system comprises a detection light source, an optical fiber accelerometer, a multiplexing device, a photoelectric detector, a signal collecting and processing unit and the like. The phase generation carrier unit is used for generating carrier signals, signal demodulation and processing are combined, the system can accurately capture weak vibration signals caused by pipeline leakage, the leakage position is determined through a cross-correlation operation algorithm, and therefore the accuracy and reliability of pipeline leakage monitoring are improved. In addition, the system is low in cost and easy to install and maintain, and has good economical efficiency and expandability.

The invention provides a finite element analysis method and system for geometric design of a flow regulating valve, and relates to the technical field of data processing.The method comprises the steps that 1, spatial geometric feature analysis is conducted on each data point in a discrete contour coordinate dataset, the principal curvature value of each data point on the sealing surface of a metal diaphragm is solved, and the principal curvature value of each data point is calculated; determining a point with the maximum average curvature value on the sealing surface of the metal diaphragm as a core morphology reference point; step 2, establishing a local coordinate system by taking the core morphology reference point as an original point, screening four sealing state points from the discrete contour coordinate data set, solving a corresponding space plane equation, and calculating a space intersection line between the space plane and the sealing surface of the metal diaphragm; according to the method, through accurate positioning of the core reference point, definition of the analysis sub-domain, grid division, mechanical solution, leakage rate calculation and parameter optimization, the dynamic particulate matter problem is effectively improved, and the sealing performance and the micro flow adjusting precision are improved.

The invention relates to the field of electronic material technology and lightning protection, in particular to an all-metal progressive impedance edge scattering control material compatible with lightning protection. The passive protection method based on the Faraday cage concept is applied to lightning stroke protection of a typical edge scattering suppression structure, the surface of the edge scattering suppression structure is covered with the whole full-covering periodic hollow full-metal membrane, and the gradual hollow metal sheet is formed by carving a gradual change hole unit structure on the metal sheet. Therefore, the propagation characteristic of the electromagnetic wave on the metal surface is changed, and the electromagnetic wave adjusting effect is achieved. According to the invention, no negative influence is generated on the original electrical performance, strong lightning protection is compatible, and lightning current injected into a target body can be efficiently guided away, so that the lightning current smoothly flows into a conductor to well protect a wave-absorbing material below the conductor, and a good lightning protection effect is achieved. The method is simple in process, high in operability, easy to implement industrially and suitable for popularization.

The application provides an electromagnetic shock wave generator, comprising an electromagnetic generating assembly and an electromagnetic induction assembly, the electromagnetic generating assembly is arranged on one side of the electromagnetic induction assembly; wherein the electromagnetic generating assembly comprises a coil and a conductive piece connected with each other, the electromagnetic induction assembly comprises a clamping piece and a metal diaphragm fixed at least partially to the periphery of the clamping piece, the metal diaphragm is arranged on one side of the coil and can vibrate under the action of the coil; wherein a metal sheet is arranged on the side of the metal diaphragm away from the coil, the radial dimension of the metal sheet is smaller than the radial dimension of the metal diaphragm, and the metal sheet is arranged at the middle part of the metal diaphragm. The electromagnetic shock wave generator provided by the application can generate shock waves, and the metal diaphragm generating the shock waves will not be damaged due to external microjet impact and other factors, meanwhile, the shock waves will not be excessively lost, the service life is prolonged and the functionality is not reduced.

The present invention discloses a metal diaphragm capacitor compound vacuum gauge, which includes a first housing, a second housing and an external connection pipe. The external connection pipe is fixedly connected to the bottoms of the first housing and the second housing, and an inner housing is inserted between the first housing and the second housing; a metal pipe is fixedly inserted at the top of the inner housing, and a first diaphragm and a second diaphragm are respectively arranged on both sides of the inner housing. A first electrode is attached to the side of the first diaphragm away from the metal pipe, and a first electrode tube is fixedly connected to the side of the first electrode close to the first housing. The present invention utilizes the principle of pure mechanical properties to achieve full-range, medium-high vacuum degree and high-precision measurement with the cooperation of two metal diaphragm capacitor sensor cores. The product adopts the principle of metal diaphragm capacitor, featuring high precision and fast response; it uses stainless steel material, has good corrosion resistance, can meet the use under different gases and different working conditions, does not require preheating, can directly measure different gases, is simple to maintain and has good repeatability of the product.

The invention discloses an optical fiber LMR pressure sensor which comprises a metal shell, the top of the shell is open, a metal diaphragm covers the metal shell, a force transmission metal rod is fixed to the center of the bottom end face of the metal diaphragm, a fluoride layer is deposited at the lower end of the force transmission metal rod, and a gallium-doped zinc oxide thin film layer is deposited on the fluoride layer; the single-mode optical fiber is located in the metal shell, and a cladding of the middle section of the single-mode optical fiber is removed to expose a fiber core of the middle section; the micro capillary tube with an opening in the side surface is fixedly sleeved on the cladding at the two ends of the single-mode optical fiber, the micro capillary tube is filled with matching liquid which has the same refractive index as the cladding and immerses the bare core, and the matching liquid can be used as a liquid cladding of the bare core; the gallium-doped zinc oxide thin film layer is located above the liquid cladding, and the space range between the gallium-doped zinc oxide thin film layer and the bare core is called as a transition layer. According to the sensor, the influence of stress transmission on the optical fiber can be avoided, the sensor has a wide sensing range, and high sensitivity can be guaranteed.

The utility model provides an alignment cutting device for sheets, which is characterized in that a feeding unit respectively sends out two metal diaphragms and an insulating diaphragm, and a cutting part on one side cuts the two metal diaphragms and the insulating diaphragm by a cutter; a first conveying frame located at the top of a conveying space of the conveying unit is used for conveying one metal diaphragm, second conveying frames located on the two sides of the conveying space are used for conveying insulating diaphragms, a conveying belt located below the second conveying frames is used for conveying the other metal diaphragm, and the conveying belt extends into the inner working space of the laminating unit; and a processing mechanism is arranged in the working space and can be used for processing and combining the two metal diaphragms and the insulating diaphragms, so that the aim of rapidly processing the two metal diaphragms and the insulating diaphragms into sheets is fulfilled.

This invention pertains to photothermal evaporation and its water purification, specifically relating to a biochar metal membrane. It is composed of a copper foam mesh, titanium acetylacetonate, lychee charcoal, and alcohol. The composition, by mass, includes one sheet of copper foam mesh, 75g of alcohol, 2g of lychee charcoal, and 0.2g of titanium acetylacetonate. The invention also discloses a method for preparing the biochar metal membrane, specifically involving: stirring titanium acetylacetonate and lychee charcoal in alcohol; immersing the copper foam mesh in the solution repeatedly for several dozen times to obtain a hydrophilic biochar metal membrane. The XRD and contact angle images of the obtained hydrophilic biochar metal membrane are shown in Figure 1a. The prepared biochar metal membrane has a porous structure, further enhancing its photothermal performance. This invention also discloses the photothermal evaporation performance of the biochar metal membrane and its application in seawater desalination. The biochar metal membrane of this invention is non-salt-accumulating, hydrophilic, and possesses highly efficient photothermal performance, enabling its application in multiple fields.

The utility model belongs to the technical field of metal material fatigue tests, and particularly relates to a testing device for diaphragm compressor research and development, which comprises a support and a testing assembly, the support is a rectangular frame-shaped support, clamping assemblies are arranged in the middle of the inner side of a left frame and the middle of the inner side of a right frame of the support, and the testing assembly comprises a hydraulic cylinder and a testing mold. The fixed end of the hydraulic cylinder is connected with the inner side of an upper side frame of the support, the telescopic end of the hydraulic cylinder is connected with the upper side of the test mold, the test mold comprises an upper mold, a lower mold and a connecting plate, and the connecting plate is fixedly connected with the rear sides of the upper mold and the lower mold. And a periodic load test is carried out, and the stress state of the compressor in actual service is simulated to the greatest extent, so that the data of the symmetric bending fatigue test of the metal diaphragm is true and credible.

A device for descaling a metallic membrane of a tank for transporting and / or storing gas in liquid form includes: a rail secured to the metallic membrane; a head projecting a laser beam to descale the metallic membrane; a support interposed between the projection head and the rail and traveling along the rail; and a device allowing a movement with respect to the metallic membrane of a point of impact of the laser beam on the metallic membrane, the movement being different from the travel effected by the support on the rail.

The invention relates to a composite vacuum gauge combining a metal diaphragm capacitive sensor and a barometer, and relates to the technical field of vacuum measurement. The composite vacuum gauge combining the metal diaphragm capacitive sensor and the barometer comprises a first shell, an electrode, a metal diaphragm, a second shell, a third shell, the barometer, a flange, a connecting pipe fitting and a vacuum pipe, the first shell, the second shell and the third shell are sequentially arranged from top to bottom, the connecting pipe fitting is fixedly connected with the lower end of the third shell, and the connecting pipe fitting is composed of a connecting pipe and a standard vacuum chuck used for being connected with a tested vacuum cavity interface. The composite vacuum gauge has the advantages of being large in measuring range, good in repeatability, high in precision, good in sensitivity, small in size, convenient to install, excellent in corrosion resistance, capable of being used under different working conditions, capable of directly conducting vacuum measurement without preheating, beneficial to developing new application technical fields and capable of meeting the requirements of customers for diversity and individuation.

The utility model relates to the technical field of terahertz communication, in particular to a terahertz waveguide cavity filter, which solves the problem of high waveguide processing difficulty in the prior art. Comprising an upper metal shell and a lower metal shell which are connected with each other, an upper through groove is formed in the upper metal shell, a lower through groove is formed in the lower metal shell, the upper through groove and the lower through groove are oppositely arranged to form a rectangular waveguide, and a metal diaphragm is arranged in the rectangular waveguide; and a positioning assembly is arranged between the upper metal shell and the lower metal shell. The filter has the beneficial effects that an equivalent filter circuit is formed in a rectangular waveguide cavity by adopting a metal diaphragm in the filter, so that a filter resonance circuit is realized; the rectangular waveguide is coherent, regular in structure and low in processing difficulty; the positioning assembly ensures that the relative position of the upper metal shell and the lower metal shell is accurate when the upper metal shell and the lower metal shell are connected, thereby ensuring that the upper through groove and the lower through groove are accurately aligned, ensuring that the structure of the rectangular waveguide is complete, and facilitating the assembly of the filter.

The invention relates to a metal membrane piece position correction method and system based on improved template matching. The method comprises the steps that an adaptive Retinex algorithm is combined with a DnCNN denoising network to carry out image preprocessing; fusing an ASIFT algorithm and a SuperPoint network to extract feature points and a confidence map; initial matching is realized by using the FREAK descriptor and the weighted Hamming distance, and initial mismatching is filtered based on a bidirectional nearest neighbor criterion; designing a double-layer filtering mechanism in which Guided-PROSAC and local topological structure verification are combined to eliminate mismatching; mapping angular points of the template image to a target image to calculate a pose error vector; the pose error vector is transmitted to a mechanical arm controller for metal diaphragm piece position correction; according to the method, the real-time requirement of a production line is met through reasoning on edge equipment, multiple defects of the traditional technology in the aspects of robustness, precision and automatic integration are overcome, and reliable technical support is provided for a precise assembly task in intelligent manufacturing.

The invention discloses a metal diaphragm assembly with an insulating property, and relates to the technical field of diaphragm couplings. In order to solve the problems that in order to achieve certain insulativity, insulating parts made of non-metal materials are usually additionally arranged at certain positions of an existing coupler to isolate current, and due to the fact that the strength of a non-metal electricity-resisting gasket is far lower than that of the metal materials, the reliability and safety of the coupler are low in the working process. At least ten diaphragms are coaxially fixed through the T-shaped sleeves and the gaskets, the T-shaped sleeves and the gaskets are pressed into an integrated structure through a press machine after assembly, the ends of the T-shaped sleeves and the gaskets are higher than the diaphragms, and ceramic coatings are arranged on the outer surfaces, making contact with the diaphragms, of the T-shaped sleeves and the gaskets, so that insulation is achieved, the insulation resistance is actually measured to be 213 megohms, and the insulation index requirement is met; and compared with insulation realized in the prior art, the reliability and the safety of the coupler in high-speed operation are ensured, the high-temperature resistance is realized, and the working temperature range is-70 DEG C to 300 DEG C. The invention is applicable to the field of couplings.

An energy storage element includes a housing having a metallic, cup-shaped housing part with a housing bottom and a lid component that closes a terminal opening of the cup-shaped housing part. The energy storage element further includes an electrode-separator assembly arranged in the housing, the electrode-separator assembly comprising a first flat terminal end face, a second flat terminal end face, an anode with an anode current collector having a first edge and a second edge parallel thereto, and a cathode with a cathode current collector having a first edge and a second edge parallel thereto. The housing bottom has an aperture closed by a metallic membrane that acts as a primary protection device against internal overpressure, and at least one groove on its inside or outside that acts as a secondary protection device against internal overpressure.

The invention discloses metal powder tape casting slurry and a preparation method and application thereof, belongs to the field of metal inductors and manufacturing thereof, and prepares a Fe-Si series metal diaphragm which is high in slurry solid content (greater than 90%), compact in tape casting diaphragm and free of holes by adding an organosiloxane polymer and adjusting the proportion of a dispersing agent to a binder. The thickness of the Fe-Si series metal diaphragm is adjustable within 20-100 microns, the diaphragm density is 4.9 g / cm < 3 >, the magnetic conductivity after sintering exceeds 50 (1MHz), and the Fe-Si series metal diaphragm can be suitable for diaphragm preparation of a metal powder inductor. The preparation method is simple and easy for mass production.

The invention provides a redundant sealing diaphragm capsule and an inflation device and method thereof. The diaphragm capsule is used for longitudinal coupling pulsation suppression of spacecraft and carrier rocket propulsion systems. The multiple layers of metal diaphragms are installed in the shell after being welded and stacked through electron beams, a cavity is formed between the multiple layers of stacked metal diaphragms and the upper end cover, and the cavity is used for storing compressed gas with certain pressure; the compressed air is used for longitudinal coupling pulsation suppression. The valve element is of a non-metal structure. The valve element and the valve seat are pressed tightly under the acting force of the spring, and the conical surface structure on the valve element and the conical surface structure of the valve seat form a first seal. And the nonmetal O rubber ring on the valve core and the conical surface structure of the valve seat form a second seal, and the two seals are redundant to each other, so that the sealing reliability of the diaphragm capsule is improved. The inflating device is favorable for improving the inflating efficiency of the multiple diaphragm capsules, and effectively reduces the pressure drop of the diaphragm capsules during recovery after the inflation is completed.

The utility model discloses a pressure-resistant temperature and pressure sensor, which comprises a sensor shell, a circuit board and a pressure sensing core, and the circuit board and the pressure sensing core are mounted in the sensor shell. The sensor shell consists of an upper shell and a lower shell which are fixedly connected, and an inner bracket is clamped between the upper shell and the lower shell; a mounting clamping groove is formed in the inner support, the pressure sensing core body is correspondingly clamped in the mounting clamping groove, and the circuit board is pressed on the pressure sensing core body; the inner support is also provided with a plurality of barbs, and the barbs are respectively hooked on the outer edge of the upper surface of the circuit board. A pressure sensing part of the pressure sensing core body is a metal diaphragm, and two silicon strain gauges are sintered on the metal diaphragm so as to form a Wheatstone bridge on the pressure sensing core body; the two silicon strain gauges are sintered on the metal diaphragm through glass cement. The utility model has good pressure resistance, and can meet the high pressure requirement in the working process.

Non-elastomeric, non-polymeric, non-metallic membrane valves for high vacuum applications are disclosed. Such valves function even when the fluid control side of the valve is exposed to a sub-atmospheric pressure field that can typically be used to fold / seal traditional elastomeric membrane valves.

The present invention discloses a three-bend diaphragm loaded polarizer, which aims to solve the defect of low power capacity of existing dielectric plate polarizers and ferrite polarizers. 01 ‑TE 11 It consists of a mode converter and a diaphragm-loaded circular polarizer. 01 ‑TE 11 The circular waveguide section of the mode converter and the diaphragm-loaded circular polarizer is connected. 01 ‑TE 11 The mode converter consists of a first circular waveguide, a first curved circular waveguide, a second curved circular waveguide, a third curved circular waveguide, and a second circular waveguide. A diaphragm-loaded line-circular polarizer is constructed from the third circular waveguide and a metal diaphragm. The metal diaphragm is welded symmetrically along the axis of the third circular waveguide to the inner wall of the third circular waveguide, forming a solid boat-like shape. The present invention boasts high mode conversion efficiency, with a transmission efficiency exceeding 99.5% at the center frequency. The present invention also features a simple structure, easily implements polarization switching, and can achieve gigawatt-level power capacity.

The invention provides a metal film type gas sampling device. The metal film type gas sampling device comprises an electromagnet, an ejector pin assembly, a sampling device main body and a metal film, a movable pipeline penetrating through two ends of the sampling device main body is arranged in the sampling device main body, the electromagnet is in airtight connection with a first end of the sampling device main body and is aligned with a corresponding opening of the movable pipeline at the end, and the metal film covers an opening of the movable pipeline at a second end of the sampling device main body; the electromagnet comprises a push rod and a coil, the coil is used for driving the push rod to move in the axial direction, the end of the push rod is fixedly connected with the ejector pin through a connecting piece, and the ejector pin assembly is coaxial with the movable pipeline and can reciprocate in the movable pipeline; the sampling device main body is also provided with a sampling branch communicated with the movable pipeline, and the sampling branch is provided with a sampling chamber for storing sampling gas. By adopting a matching structure of the ejector pin assembly and the metal film, the electromagnet receives an external electric control signal and then drives the ejector pin to puncture the metal film, so that instantaneous sampling of gas in a closed container cylinder is realized.

The utility model relates to the technical field of atomizing sheets, in particular to an integrally-formed atomizing sheet shell and an atomizing device. The device comprises two first side walls which are oppositely arranged, two second side walls which are oppositely arranged and a third side wall, every two of the first side wall, the second side wall and the third side wall are perpendicular to each other; the two first side walls, the two second side walls and the third side wall are enclosed to form an accommodating cavity with an opening; the containing cavity is provided with two first parts and a second part, the second part is located between the two first parts, and the length of the second part in the first direction is smaller than that of the first part in the first direction; the first part is used for accommodating a metal diaphragm, and the second part is used for accommodating a ceramic ring piece; and each first side wall is provided with a through hole, so that the accommodating cavity is communicated with the outside. The atomization piece is stable in structure, and therefore the protection effect on the atomization piece is improved.

The invention relates to the technical field of compressor diaphragms, and particularly discloses a preparation process of a diaphragm compressor diaphragm with long service life, the diaphragm compressor diaphragm with long service life is prepared after the surface of a metal diaphragm is processed by processing modes such as carbonitriding, laser cladding and coating, the diaphragm is smooth in surface and has good corrosion resistance and hydrogen resistance, and the service life of the diaphragm compressor diaphragm is prolonged. And the requirements of compressor industry development are met.

The application relates to the technical field of metal diaphragm manufacturing processes, in particular to a tray assembly and a basket device for wet processing of metal diaphragms. The tray assembly comprises a first tray and a second tray, the two trays are the same in structure and are arranged in mirror symmetry; process round holes for clamping metal diaphragms are arranged on the two trays respectively, and the two trays are connected through positioning pins, fixing pins and spacing pins. The basket device comprises a basket frame assembly, a fixing assembly and the tray assembly; the basket frame assembly is used for being connected with external equipment and can carry at least one tray assembly; the fixing assembly is arranged on the basket frame assembly and can fix the tray assembly on the basket frame assembly. The application solves the process surface shielding problem in the wet processing of metal diaphragms to a certain extent, meets the requirements of multi-workpiece processing and compatibility, ensures that the metal diaphragm is placed firmly, greatly reduces the difficulty of operators and improves the production efficiency.

In order to solve the technical problem that an existing metal diaphragm polarizer manufacturing method is not suitable for batch production and manufacturing of frequency bands, the invention provides a high-precision Q / V frequency band metal diaphragm polarizer. A polarization section in an inner core of the polarizer is divided into a plurality of polarization sheets with equal outer section circles, step pin positioning holes are formed in the positions, close to the outer section circles, of the end faces of the polarization sheets, the polarization sheets are sequentially installed on step pins through the step pin positioning holes, and then the polarization sheets are integrally placed into an outer sleeve of the polarizer. And the fixed connection between the polarizer inner core and the polarizer outer sleeve is realized in a screw crimping manner. According to the multi-layer polarization sheet laminated structure, integrated processing of the polarizer is avoided. As each polarization sheet is of an annular sheet structure, the structural form is simple, high-precision machining of the metal diaphragm on the inner cavity of the polarization sheet can be realized by adopting common machining, and compared with an integral polarizer, the processing difficulty of a single polarization sheet is obviously reduced, and the processing precision and the processing efficiency are obviously improved.

The application discloses a multi-arm diaphragm loading type variable polarizer, and aims at solving the defects of low power capacity of existing dielectric plate variable polarizer and ferrite variable polarizer. The application is composed of a multi-arm mode converter and two diaphragm loading type circular polarizers. The circular waveguide section of the multi-arm mode converter is connected with the first diaphragm loading type circular polarizer, and the circular waveguide section of the second diaphragm loading type circular polarizer is connected with the second diaphragm loading type circular polarizer. The multi-arm mode converter is composed of a power division structure, a power combination structure and N E-plane bent waveguides. The two diaphragm loading type circular polarizers are completely same and are composed of circular waveguides and metal diaphragms. The metal diaphragms are symmetrically welded on the inner walls of the third circular waveguides and present solid ship shapes. The application has high mode conversion efficiency, and the transmission efficiency at the central frequency is more than 99%. The application has simple structure, and the variable polarization function is easy to realize, and the power capacity of GW level can be realized.

The application provides a flow regulating valve geometry finite element analysis method and system, and relates to the technical field of data processing.The method comprises the following steps: step 1, spatial geometry feature analysis is performed on each data point in a discrete profile coordinate data set, the principal curvature value of each data point on the metal diaphragm sealing surface is solved, the point with the maximum average curvature value on the metal diaphragm sealing surface is determined as a core topography reference point; step 2, a local coordinate system is established with the core topography reference point as the origin, four sealing state points are screened from the discrete profile coordinate data set, the corresponding spatial plane equation is solved, and the spatial intersection line between the spatial plane and the metal diaphragm sealing surface is calculated. Through accurate positioning of the core reference point, definition of the analysis subdomain, mesh division, mechanical solving, leakage rate calculation and parameter optimization, the application effectively improves the dynamic particulate matter problem, improves the sealing performance and micro flow regulating precision.

The invention relates to a semiconductor device, a preparation method and an electrical system. Disclosed is a semiconductor device comprising: a semiconductor substrate comprising at least one power semiconductor device; the insulating diaphragm is arranged on the semiconductor substrate and is provided with at least one first opening penetrating through the insulating diaphragm, and the at least one first opening enables the corresponding first part of the semiconductor substrate to be exposed; at least one electrically conductive attachment member filled in a corresponding one of the at least one first opening; and a metal diaphragm disposed on the insulating diaphragm and the at least one attachment member, where the at least one attachment member joins and electrically connects a respective portion of the metal diaphragm with a respective first portion of the semiconductor substrate.

The invention belongs to the technical field of high-temperature dynamic pressure measurement and high-temperature airtight packaging. According to the high-sensitivity broadband response piezoelectric type high-temperature pressure sensor and the assembling method, a pressure-force conversion structure of a force transmission center column-annular metal diaphragm, a piezoelectric signal generation part formed by stacking a plurality of pieces of reverse polarization in parallel and an acceleration compensation part based on an acceleration compensation inertial mass block are integrated on the same axial force transmission link; and high-temperature reliable wire leading is realized by adopting a vacuum brazing airtight connector of a kovar alloy contact pin, an aluminum oxide ceramic tube and a metal shell. The shell of the sensor is preferably made of high-temperature alloy, and multi-stage sealing is formed through vacuum brazing and laser welding, so that the sensitive element works in a closed inner cavity with high insulation and low leakage rate for a long time. According to the invention, the contact rigidity and the charge acquisition stability are improved, the typical sensitivity can be greater than 1pC / kPa, the frequency response upper limit can reach 6000 Hz, and the sensitivity drift can be controlled within 5% after long-term aging under the condition of 500 DEG C.

The utility model provides a kind of diffusion silicon pressure sensor, comprising: pedestal, metal needle is provided on the pedestal;Process joint, including first end and second end, installation cavity is provided in the second end of process joint, pressure sensitive chip is provided in installation cavity, the pressure sensitive chip is blocked in the pedestal by the pedestal, the pressure sensitive chip is electrically connected between the metal needle;Metal diaphragm, set in the first end of process joint, for inserting measured medium, and measured medium pressure is transferred to the pressure sensitive chip;The circumference of the metal diaphragm is welded between the first end of process joint and seals.This scheme solves the frost heaving failure problem that has long plagued diffusion silicon pressure sensor in the way of simple and efficient, brings significant improvement in reliability, cost, process and application range etc.