37 results about "Microwave response" patented technology

A method and apparatus for enhanced microwave imaging of an object collects microwave responses for multiple combinations of transmit antennas, receive antennas, and object movement states. The responses are grouped into sets of responses corresponding to at least two object movement states. An image is reconstructed from the set of responses for each movement state, and a differential image representative of object movement is generated from the reconstructed image for each of the at least two object movement states. The differential image is overlaid on a reconstructed image to obtain an enhanced composite image of the object.

A system and method for determining loading of a filter having a first dielectric constant with a material having a different dielectric constant, is disclosed. The filter is contained within a metallic container forming a microwave cavity, and microwave or RF energy is created within the cavity and changes in the cavity microwave response are monitored. The changes in cavity microwave response are related to filter loading. In a preferred embodiment, the microwave energy includes multiple cavity modes thereby allowing determination of spatial distribution of the contaminant material loading. In one embodiment, the microwave cavity response includes a shift in frequency of a resonant mode. Alternatively, the microwave cavity response includes a shift in quality factor Q of a resonant mode. The microwave cavity response may include a shift in amplitude or peak width of the microwave's signal at resonance.

The invention relates to a swimming pool safety monitoring system based on microwave detection and a method thereof. The swimming pool safety monitoring system comprises a first microwave emitter, a microwave response chip, an information processor and an alarm module. The microwave response chip has a unique identifier IP and is detachably fixed on the head part of a swimmer. The first microwave emitter is installed above or at the periphery of a monitoring area and emits microwave signals to the monitoring area at intervals and is used for detecting the microwave response chip in the monitoring area and feeding back the detected identifier IP to the information processor. The information processor receives the identifier IP fed back by the first microwave emitter and is connected with the alarm module. Microwave detection and matching and comparison of the information processor are adopted so that inspection speed of the monitoring area can be greatly enhanced and rescue reaction time can be reduced. Besides, the construction structure is simple, construction cost is low and later maintenance is simple and convenient.

The invention relates to the field of admixtures for building materials, in particular to a microwave-responsive admixture active release capsule and a preparation method thereof. The active release capsule is composed of a capsule wall, a capsule core and an encapsulation material, the capsule wall is porous ceramsite; the capsule core is an admixture that needs to control active release; the encapsulation material is doped with Fe 3 o 4 organic phase change materials. The method of the invention is fast and simple, the materials used have wide sources, can exist stably in building materials, and have a strong ability to load admixtures, and can be widely applied to the loading of various admixtures. In addition, using Fe in packaging materials 3 o 4 Microwave responsiveness and microwave-absorbing heat-generating function can trigger the capsule response by applying an external microwave signal to make it actively release the admixture, effectively solving the problems of low utilization efficiency and even possible negative effects of the admixture directly mixed into building materials. This enables active control of building material properties.

The invention provides a swimming pool safety monitoring system based on microwave detection, which includes a microwave emission unit, a microwave response unit, an acoustic-electric conversion unit, an information processor and an alarm module; the microwave emission unit and the acoustic-electric conversion unit are detachably fixed on the swimming pool head of the swimmer; when the head of the swimmer emerges from the water, the diaphragm of the acoustic-electric conversion unit vibrates and outputs an electrical signal to the microwave transmitting unit through the acoustic-electric conversion unit; the microwave transmitting unit emits the first A microwave signal is sent to the microwave response unit; the microwave response unit feeds back the received first microwave signal to the information processor; the information processor receives and processes the received information, and is connected to the alarm module. The invention provides a swimming pool safety monitoring system and method based on microwave detection to solve the problem of high false alarm rate in existing swimming pool monitoring measures.

The invention discloses a preparation method and application of a TPU-based microwave response 4D printing consumable. Firstly, the filler (carbon nanotubes, nano-silicon carbide or nano-zinc oxide) is subjected to surface active reaction to prepare active functional fillers, and then the active functional fillers are introduced into the semi-crystalline TPU resin with excellent shape memory performance by melt blending method, and then TPU-based microwave-responsive 4D printing consumables were prepared by twin-screw extrusion. The TPU-based microwave-responsive 4D printing consumables are applied to FDM technology to print microwave-responsive smart structural parts. The invention prepares a TPU-based microwave-responsive 4D printing consumable through a simple method, and the prepared TPU-based microwave-responsive 4D printing consumable has sensitive microwave responsiveness, and excellent thermal, mechanical and shape memory properties. The 4D printed smart structural parts are sensitive to microwaves and have excellent mechanical properties.

This invention refers to a kind of method of producing sopping material by grafting sand sagebrush gum into crylic acid (acrylate) in microwave radiation. The manufacturing engineering is to neutralize the crylic acid partially with sodium hydroxide, potassium hydroxide or ammonia, then adds initiator and sand sagebrush gum or other vegetable gum to it when whisking and puts it into microwave response operator after the system is well-proportioned. You should adjust it to certain radiation power and radiation time, without adding crosslinking agent to it, to graft the sand sagebrush gum into crylic acid and dry the product. After smashed, it becomes the final product. The water absorption rate of the sopping material produced by the invention is between 400ml / s and 500ml / s. The polyreaction only needs between 4min and 5min after adopting the microwave radiation technology. This invention can solve the problem of high cost of now-existing sopping material. The product can be used as anti wind erosion agent and sand-fixation agent in the field of entironment and play an active role in advancing germination, anti-drought and other dry farming.

The invention discloses a microwave response characteristic test and analysis method of high-sulfur coal and sulfur-containing model compounds, which belongs to the research method of coal microwave desulfurization technology. The method steps: 1) preparing a powder sample; 2) testing the dielectric constant of the powder sample; 3) analyzing and theoretically calculating the dielectric constant of the powder sample; 4) conducting a microwave desulfurization test; 5) analyzing and summarizing the high-sulfur coal and Microwave response properties of sulfur-containing model compounds. Advantages: Combining the measured data and theoretical conversion, the actual dielectric constant test method of coal microwave broadband is established, and then the dielectric property test is carried out on the basis of preparing various powder samples with comprehensive properties by integrating existing analysis methods and sample preparation methods. A comprehensive study of the microwave dielectric response characteristics of coal was realized, and then a comprehensive study of the microwave desulfurization mechanism and coal quality changes was realized through the microwave desulfurization test combined with industrial analysis, component determination, coal quality analysis, functional group and sulfur occurrence form detection, and finally A comprehensive study on the microwave response characteristics of coal has been realized.