38results about How to "No noise interference" patented technology

The invention relates to a method and a system for testing a microphone of an electronic device, in particular to a method for testing the microphone of the electronic device. The electronic device is internally provided with a test program which comprises the following steps of: (a) converting sound acquired by the microphone of the electronic device into a recording file; and (b) comparing the recording file to determine whether to accord with a preset standard or not, wherein if the recording file accords with the preset standard, the microphone passes the test and otherwise the microphone does not pass the test. The method for testing the microphone of the electronic device has the effects of eliminating noise interference and avoiding the problem of inaccurate manual judgment as well as saving the test time in large amount of tests.

The invention relates to a works progress data inputting and recording method of a constructional engineering management system, so that defects in the prior art can be solved. The method comprises: step one, a constructor uploads an unconstructed photo and a construction effect picture; step two, the constructor takes a picture of a current building based on a progress and uploads the shot picture to a constructional engineering management system and the constructional engineering management system stores the picture as a current progress; step three, a user takes a picture after current concealed work completion continuously according to the progress of the constructional project and then uploads the picture to the constructional engineering management system continuously, the constructional engineering management system adjusts the current picture and then compares the adjusted picture with the current progress, selects a different part in the construction project, and stores the current picture as the current progress; and step four, if the current different part is the concealed work, a step five is executed; and otherwise, the constructional engineering management determines that the different part in the current construction project is compared with the effect picture; and if the current different part contrast is larger than a threshold, accordance with the current progress is determined.

The invention discloses a soldering-resistance conductive thin film on the surface of a sensitive structure of a space electrostatic accelerometer. The soldering-resistance conductive thin film comprises a titanium film layer, a platinum film layer and a gold film layer, one side of the titanium film layer is adhered with the surface of a sensitive structure piece of the space electrostatic accelerometer, and the other side surface is sequentially connected with the platinum film layer and the gold film layer. The soldering-resistance conductive thin film completely uses the non-magnetic materials, thus there is no noise interference on measurement of the space electrostatic accelerometer, and all the materials have relatively low coefficient of line-expansion, the relatively good matching between substrate glass material and each film layer can be ensured and stability of the thin film can be ensured.

The invention discloses an online monitoring method for the metering performance of a diaphragm gas meter. The online monitoring method comprises specific working steps of the gas meter and a pressuresensor at the gas conveying end, and an analysis step; and the pressure sensor is fixedly mounted at the gas conveying end of the gas meter. The specific working steps include the following steps that, according to the internal structure and the principle of the diaphragm gas meter, when the pressure fluctuation in the period is ignored, a stable pulsation phenomenon exists in gas flow of gas conveying. The method relates to the technical field of gas metering and monitoring. The online monitoring method for the metering performance of the diaphragm gas meter can realize online monitoring ofthe metering performance of the diaphragm gas meter, and achieves the purpose of performing dynamic monitoring on the metering performance and the equipment performance of the diaphragm gas meter; meanwhile, the pipeline pressure fluctuation is monitored and analyzed, so that the centralized reading and intelligentization of the diaphragm gas meter are indirectly realized; and therefore, the method has great significance for improvement of a stock table.

The invention discloses a valve, which can keep high-pressure water tank with constant air pressure for a long time and make the high-pressure reserve more high-pressure water volume. It comprises a constant pressure set by constant-pressure cavity and elastic film, which can apply pressure to sealing ports of water inlet and outlet of water tank so that compressing air preset in the high-pressure tank can not be discharged but running water with higher pressure can come in and get out freely; it can satisfy the washing condition of high-pressure and large water flow in washing toilet chair to achieve the purpose that water is saved by half and it is convenient and durable.

The invention discloses a low-noise amplifier and a manufacturing method for the same. The low-noise amplifier comprises an inductor and other devices, wherein the inductor and the other devices are formed in an inductor area and other device areas on a substrate; the inductor area is partitioned by the other device areas; a high-resistance substrate isolation area is formed below the inductor area; an annular n-trap grounding protection layer is arranged around the inductor area; and the n-trap grounding protection layer surrounds the other devices areas. According to the low-noise amplifier and the method disclosed by the invention, the problem of noise interference between a low-noise amplifier module and another module can be solved, and a noise coefficient can be further effectively reduced so as to improve the performance of the low-noise amplifier.

The invention particularly relates to a bridge crack detection method based on image regeneration. The bridge crack detection method comprises the steps: carrying out image operation, wherein image subtraction operation is carried out on equal-size pure color images with different pixel values and an original bridge crack image to determine a final background image to be adopted; image enhancement: carrying out image enhancement by adopting a conversion formula based on gamma transformation; image regeneration: carrying out image regeneration according to a histogram of the bridge crack image,setting a pixel value boundary as a fixed value, removing an original background of the image according to a fixed threshold value, keeping cracks, and setting a background color of the regenerated crack image as a single color to obtain a bridge crack image with the background being the single color; carrying out crack extraction and positioning. The bridge crack detection method can detect andposition cracks of various types of bridge crack images, and is high in the applicability, and the detected cracks can reflect the actual crack condition, and noise interference is almost avoided, andaccurate positioning and extraction of the cracks are achieved.

The invention relates to an automobile intelligent safe driving method and system. Firstly, before an automobile is started completely, a driver conducts face identification automatically; secondly, before the automobile enters a driving mode normally, an alcoholicity test is conducted through a vehicle-mounted blowing pipe; afterwards, after the automobile enters the driving mode, operation of the vehicle-mounted blowing pipe is automatically converted into a carbon dioxide content test of the in-vehicle space; and finally, in the normal driving mode, a weak current induction device of a steering wheel, a human body posture signal is detected, and the automobile intelligent safe driving system judges whether the condition is fatigue driving and conducts reminding according to the signal. The automobile intelligent safe driving system comprises an automatic face identification system, an alcoholicity test system, a carbon dioxide test system and a fatigue driving prevention system. According to the automobile intelligent safe driving method and system, the prior intelligent technology is applied in automobile driving comprehensively, and ideal effects of automobile thievery prevention and safe driving are achieved.

The invention discloses a network audio mixing processing method and device, relating to the technical field of audio processing. The method comprises a step of performing symbolic accumulation on each audio data, a step of performing segmented compression on the accumulated audio data, a step of determining an attenuation factor of each segment, and a step of acquiring an outputted mixed audio signal. According to the mixing processing method, the method of segmental compression is employed for mixing, that is, the operation efficiency is high, and the mixing is easy to realize in a single-chip microcomputer. Through the actual waveform observation, the method is synthesized, there is no overflow and topping phenomenon after obtaining the mixed sound of the method, the data is compressednear upper and lower limits, the volume is large, the remaining intelligibility is high, and there is no obvious noise interference in listening. A system used in the device of the present invention can realize the function by only using the single-chip microcomputer with an ARMCortexTM-M4 architecture or higher, an existing LWIP protocol stack, the system can support the basic transmission protocol in TCP / IP, since only one single-chip microcomputer for processing is required, an FPGA can be omitted from a circuit, and therefore, the cost is saved.

The invention discloses a connector device capable of meeting two-way transmission requirement of a digital television. A metal sheet wraps a cylindrical copper rod, two ends of the cylindrical copper rod are arranged into two slightly-divided parts, the positions of a center of circle corresponding to the two parts are provided with grooves which are matched with TV signal wires, the grooves are clamping grooves, the metal sheet beyond the cylindrical copper rod is divided into three pieces and are arranged into a fusiform grabhook; or one metal sheet is rolled into a cylinder shape, two ends of the cylindrical metal sheet are arranged into grabhooks with a dumbbell shape with the thin middle part and two thick ends, and the thin part of the dumbbell shape is the clamping groove and is matched with the TV signal wire. The connector device can meet the two-way transmission requirement of the digital television, and has convenient, fast and firm connection, makes pictures clearer and more stable, and has no noise interference.

The invention discloses a w-type elevator guide rail connecting part. The w-type elevator guide rail connecting part comprises a tubular connecting component, a base plate and a fastening part; the base plate is composed of a base plate body, a wedge body and two end protrusion portions; a fastening connecting hole is formed in the base plate body, a pair of w-shaped guide rails are oppositely inserted into the 1 / 2 portion of the connecting component, the base plate is placed below the flat end portions of the guide rails, the wedge body on the base plate is pressed into an opening of the connecting component until complete locking joint is achieved, and in order to prevent deformation, after a fixed clamp is used for clamping the guide rails and the connecting component, the flat end portions of the guide rails and the base plate body are fixedly locked through fastening parts. Thus, the w-type elevator guide rail connecting part is formed by the base plate, the connecting component and the fastening part. The w-type elevator guide rail connecting part has the beneficial effects that the guide rail joint area does not deform, meanwhile, local deformation of guide rail bodies is avoided, guide shoes and guide pulleys slide and roll and do not have the rapid violent action, and the noise interference of the guide rail connecting point does not exist.

The invention provides a method and device for transmitting audio data in a target area, and the method comprises the steps: determining a to-be-transmitted data packet which at least comprises first data used as a digital video display signal, second data used as a USB data signal, and third data used as an analog audio signal, and the third data comprises left channel analog audio data and right channel analog audio data; sending a data packet to a receiving end through the Type-C wire harness, so that the receiving end plays the left channel analog audio data and the right channel analog audio data locally or sends the left channel analog audio data and the right channel analog audio data outwards based on an FM radio frequency method in the target area while displaying the digital video display signal, wherein the Type-C wire harness is provided with a plurality of preset interfaces, and the plurality of preset interfaces at least comprise a first data interface used for transmitting first data, a second data interface used for transmitting second data and a third data interface used for transmitting third data. According to the method, USB data signals, digital video display signals and analog audio signals can be transmitted at the same time.

The invention relates to an LNG storage tank rollover suppression device which mainly comprises an LNG storage tank, heat pipes and connectors, wherein the heat pipes are upright in the LNG storage tank and uniformly arranged in the storage tank; two adjacent heat pipes are connected with each other through the connector. When a temperature gradient exists between liquid layers in the LNG storage tank, the heat pipes are rapidly started, and bottom heat is transferred to the top, so that the temperature in the storage tank is kept basically consistent, and a rollover phenomenon is suppressed from the source. Compared with the prior art, the LNG storage tank rollover suppression device disclosed by the invention has the advantages that the heat pipes are driven to work by virtue of the temperature difference of the liquid layers, and a mechanical motion part is avoided, so external motive power is not needed, the noise interference or pollution is avoided, daily maintenance is not needed, and the device is safe and reliable and can continuously work for a long time.

The invention discloses a joint device capable of meeting the two-way transmission requirement of a digital television, which is a cylinder formed by coiling a sheet metal, wherein the two ends of the cylinder are arranged to be dumbbell-shaped grabhooks which are provided with a thin middle part and two thick ends respectively; the thin part of the dumbbell-shaped grabhook is a clamping groove; a hollow cone of the thick part is a grabhook which is provided with 4 to 12 holes; and the end part of the grabhook is bell-mouthed. The joint device can meet the two-way transmission requirement of the digital television, is convenient, fast and secure to connect, and can make pictures clearer and more stable and prevent noise interference.

The invention discloses back-heating type no pump ternary solution absorption refrigeration and air conditioning system. It is made up of three containers, twenty one electric globe valves, condenser, capillary tube, evaporator, and three throttle valves. The upper of the container is set sprinkler pipe. Its middle is set back-heating tube. And its lower is set heating tube. It has the advantages of no harmful gas, no noise, good performance, low cost, and long useful life. It can be used in huge-middle-small type refrigeration and air conditioning system. And it can be driven by hot water with 50-60 centigrade degree.

A cold light drive circuit is composed of a supply input circuit, a load output circuit, a transformation circuit, a first PWM pulse width modulation circuit, a second PWM pulse width modulation circuit, an inverse circuit and a chip-microcomputer control circuit, in which, said circuits are all set on a CB and a switch technology, inverse supply technology and a chip-microcomputer control technology are applied to enable the driver to work stably and safely without any noises.

A real-time system and method for monitoring of high intensity ultrasonic wave therapy is disclosed. The system includes a sync pulse generator, a signal collection arrangement, a B type ultrasonic machine, an ultrasound therapeutic instrument, a computer and a display. The method utilizes intermittent time of ultrasonic wave to transmit sync pulse, while the pulse controlled ultrasonic therapeutic instrument transmits the ultrasonic wave in a intermittent mode meanwhile controls the computer to receive the B type ultrasonic information in intermittent time. Since the output signal sent by the ultrasonic wave machine is in synchronism with the pulse signal and avoids the noise interference of the therapeutic ultrasonic wave, in addition, the therapeutic point position image monitored by the B type ultrasonic wave can display clearly by way of computer. The system and method work under the uniform coordinated sync pulse instruction, realize the noise free real-time monitoring during the ultrasound wave therapeutic process and obtain clear B type ultrasound image.