290results about How to "Improve signal stability" patented technology

A GMR sensor element is proposed, having a rotationally symmetrical positioning of especially eight GMR resistor elements which are connected to each other to form two Wheatstone's full bridges. This GMR sensor element is especially suitable for use in an angle sensor for the detection of the absolute position of the camshaft or the crankshaft in a motor vehicle, particularly in the case of a camshaft-free engine having electrical or electrohydraulic valve timing, of a motor position of an electrically commutated motor, or of detection of a windshield wiper position, or in the steering angle sensor system in motor vehicles.

This application describes designs, implementations, and techniques for controlling propagation mode or modes of light in a common optical path, which may include one or more waveguides, to sense a sample.

Compact and robust sensors for utilization with vehicle wheel alignment angle sensor units and vehicle service devices. The sensors incorporate one or more micro-electromechanical devices configured to measure movement and/or orientation of the sensor about one or more orthogonal axes, such as when a wheel alignment angle sensor unit is coupled to a vehicle wheel during a vehicle wheel alignment angle measurement procedure, or when a vehicle lift system is articulated to raise or lower a vehicle. The sensor are further configured to provide output signals representative of the measured movement and/or orientation to a vehicle wheel alignment system processor or vehicle service device controller.

The present invention relates to fetal monitoring and, more particularly, to an electronic external fetal monitoring system that includes a self adhering single use dermal patch including embedded sensors that can be attached to the skin of an expectant maternal patient and is configured to record fetal heart rate, uterine activity, and uterine integrity.

An apparatus, for measuring an applied electrical field and for reducing perturbation to the electrical field being measured, includes a laser integrated into an electro optic crystal sensor head prior to the output fiber. A probe beam is passed along the crystal direction of low birefringence of nearly circular optical indicatrix, rather than one of high EO modulation. The EO crystal is placed between two crossed polarizers and oriented such that a small tilt angle is subtended between its optic axis and the path of the probe beam. Improved optical coupling is achieved by using a large core multimode fiber at the output, to reduce optical insertion losses. A collimating lens emits the intensity modulated laser beam back to a photodetector, where the intensity modulated laser beam is converted to an electrical signal representing both field strength and phase of the electrical field applied to the sensor head.

The invention provides compositions and methods to determine or detect the activity of enzymes, including phosphotransferases such as kinases (e.g., protein, lipid, and sugar kinases) and ATP hydrolases such as ATPases, e.g., HSP90, that employ ATP as a substrate and form ADP as a product by monitoring changes in ADP.

The invention discloses a method for analyzing a non-conductor material by utilizing a glow discharge mass spectrum, comprising the following concrete steps of: (a), processing the non-conductor material to be analyzed into a strip sample; (b), cleaning and stoving the strip sample; (c), placing metal indium into a silica crucible and heating to a molten state; (d), cladding the surface of the strip sample with a layer of metal indium membrane; (e), cleaning and stoving the strip sample again; and (f), carrying out direct current glow discharge mass spectrum analysis. By utilizing the analysis method provided by the invention, sample grinding and polishing are not needed, the pretreatment is simple and the pollution is avoided; the operation is simple and convenient, the usage amount of the metal indium is greatly decreased and the analysis cost is reduced; the discharge of the sample is similar to that of a conductor sample and is easily stabilized, the stability of a signal is good, the SNR(Signal to Noise Ratio) is ideal, the analysis time is shortened and the analysis efficiency is increased; the method is suitable for the analysis of massive or crystalline materials, the universality is strong and the application range is wide; and the sample has very good discharge stability and analysis repeatability.

The invention relates to an automatic control system for monitoring the film thickness of optical filming. A light projecting device is directly connected with a light entrance port of a film coating machine or is connected with an optical splitter and a reflector chest for projecting light generated by the light projecting device into the film coating machine, a light exit portal of the film coating machine is connected with a light transporting element which is connected with a light entrance port of the optical splitter, a light exit portal of the optical splitter is further connected with a light entrance port of a photoelectric signal changeover gear, or an exit ray of the film coating machine reflects light into the photoelectric signal changeover gear through the reflector chest, an electrical signal output end of the photoelectric signal changeover gear is connected with a computer through a signal processing unit. The invention further relates to an automatic control method for monitoring the film thickness. The invention improves the stability and accuracy of monitoring the film thickness and meets the requirement of filming with high degree of accuracy.

Phase-locked loop structures are provided that facilitate enhanced stability of loop-generated signals. They include an oscillator network, a feedback loop and a controller. The oscillator network generates a loop output signal with a frequency that varies in response to a control voltage and to a frequency-determining parameter, the feedback loop generates the control voltage in response to the loop output signal and a reference signal and the controller increments the frequency-determining parameter to maintain the control voltage within a predetermined control-voltage range. These structures enhance signal stability by facilitating the use of low-gain oscillator structures and they simplify and shorten loop operations because the structures operate in a closed-loop condition at all times.

The present disclosure discloses an ultrasonic flow tube. The ultrasonic flow tube includes a water inlet, a water outlet, a sound channel, a first mounting hole for fixing a first ultrasonic transducer, and a second mounting hole for fixing a second ultrasonic transducer. The water inlet defines a first fixing room. The water outlet defines a second fixing room. An entrance and an exit are defined at opposite ends of the sound channel. The entrance is equipped with a chamfer which can make the flow more smoothly and restrain turbulent flow. An installation groove for installing a seal ring is defined at an external sidewall of the ultrasonic flow tube. The seal ring is configured to seal the ultrasonic flow tube and a peripheral structure of the ultrasonic flow tube. The ultrasonic flow tube is made of plastic or ceramic.

The invention discloses an unmanned surface vehicle and robotic fish shoal master-slave collaboration system comprising an upper computer, a host and slaves. The upper computer communicates with the slaves through the host by a wireless communication network. The upper computer is arranged in a control center. The host is arranged on an unmanned surface vehicle. The slaves are arranged on each robotic fish of the robotic fish shoal. The unmanned surface vehicle acts as a signal transmission intermediate station to transmit the detection signals of the underwater detectors, i.e. the robotic fishes, to the upper computer through the unmanned surface vehicle so that the power of signal transmission can be enhanced, the distance of signal transmission can be increased, the robotic fish shoal is quite close to the unmanned surface vehicle, real-time communication between the underwater robotic fishes and the unmanned surface vehicle can be realized, and thus the signal stability and the operation and movement radius of the whole robotic fish shoal can be enhanced. The work mode of collaboration of multiple robotic fishes is adopted so that the detection area of the detectors can be extended and the overall work efficiency can be enhanced.

The invention provides a molecular probe, and a preparation method and application thereof; the molecular probe comprises water-soluble carrier molecules, responsive polypeptides and signal molecules, wherein the responsive polypeptides have a sequence of (Xaa)m(Thr-Phe-Gly-Phe)(Xaa)nLys(Xaa) i, and wherein Xaa refers to any amino acid, and i, n and m are independently 0-4; the water-soluble carrier molecules and the signal molecules are connected with the responsive polypeptides through amido bonds. The molecular probe herein has good specificity and signal stability, provides richer autophagy detection means and has a promising application prospect.

The invention discloses a pair of positioning shoes. The positioning shoes comprise shoe bodies, wherein each shoe body comprises a shoe sole and an upper, an adhesive shoe velcro is arranged on the upper; a first cavity and a second cavity are formed in the shoe sole, and communicated with each other through a through hole; an interlayer is arranged on the adhesive shoe velcro; each positioning shoe body also comprises an integrated circuit chip main board, integrated circuit chip peripheral equipment and a storage battery; each integrated circuit chip main board is arranged inside the correspondent first cavity; the integrated circuit chip peripheral equipment is arranged in the interlayer; each storage battery is arranged in the correspondent second cavity; each integrated circuit chip main board is connected with the correspondent storage battery; the integrated circuit chip peripheral equipment is connected with the integrated circuit chip main board. The positioning shoes are high in positioning accuracy and god in signal stability; the missing probability of children and old people with dementia can be reduced.

The invention discloses a monitoring and controlling method and system of a solidification structure form of laser additive manufacturing based on pictures. The monitoring and controlling method of the solidification structure form of laser additive manufacturing based on pictures comprises the steps that step 1, pictures of a molten pool are collected in real time in the process of laser additivemanufacturing, and the collected pictures of the molten pool are output; step 2, the collected pictures of the molten pool are subjected to treatment, and dynamic characteristic parameters of the molten pool are obtained; step 3, a solidification structure form after the process of laser additive manufacturing is forecasted according to the obtained dynamic characteristic parameters of the moltenpool; and step 4, if the forecasted solidification structure form does not meet requirements, machining parameters in the process of laser additive manufacturing are adjusted, and thus the dynamic characteristic parameters of the molten pool are adjusted to required states. The monitoring and controlling system of the solidification structure form of laser additive manufacturing based on picturescomprises a molten pool picture collecting module, a molten pool picture processing module, a structure form forecasting module and a structure form controlling module. According to the monitoring and controlling method and system of the solidification structure form of laser additive manufacturing based on pictures, online monitoring and predictive controlling of the solidification structure form of laser additive manufacturing are achieved, and the advantages that the implement method is simple, the cost is low, the control efficiency is high, the reliability is high and the like are realized.

An apparatus for testing stiffness characteristics such as modulus of elasticity E of an article such as a piece of lumber moving in a conveying direction transverse to the testing axis, comprises a bearing unit capable of contacting the piece of lumber at two spaced apart portions thereof. There is provided a first deflecting unit including a first working element being normally disposed in a first static position relative to the conveying path for applying a first thrust against a loaded area on the article at an intermediary portion thereof located between the spaced apart portions, to produce an article deflection of a first magnitude. Each working element defines a loading surface extending substantially parallel to the article-conveying path. There is further provided a second deflecting unit including a second working element being normally disposed in a second static position relative to the conveying path for applying a second thrust against a loaded area of the article intermediary portion, to produce an article deflection of a second magnitude, wherein the second position differs from the first position relative to the conveying path by a differential value. The apparatus further comprises load cells coupled to the bearing unit for generating signals indicative of respective magnitudes the first and second thrusts as applied by first and second deflecting units, and a computer for deriving from such signals and differential value an indication of the stiffness of the article, such as modulus of elasticity E.

An RF transmission circuit, complex digital synthesizer and MRI apparatus are intended to enhance the stability of signal quantity and reduce the cost, wherein a complex digital synthesizer generates reference carrier frequency signal data directly in the digital domain, RF envelope mixers combine the resulting data and RF envelope signal data in the digital domain, and a digital frequency up-converter up-converts the resulting signal data in the digital domain and converts into an analog RF pulse signal.

The invention relates to a method for determining trace impurity elements in the high purity alumina polycrystalline material. The invention provides a method for determining trace impurity elements in the high purity alumina polycrystalline material, comprising the following steps of: (1) breaking the block high purity alumina polycrystalline material sample into polycrystalline particles; (2) placing the polycrystalline particles between two high purity enamel sheets, pressing, and mosaicing on the surface of the high purity enamel sheets; (3) putting the high purity enamel sheets into a GD-MS sample holder, and the side with the high purity alumina polycrystalline material is the detection surface; (4) evacuating an ion source, and adjusting a discharge voltage and a discharge currentin a pulse mode; (5) performing a pulsed glow discharge mass spectrometer analysis under the conditions set in step (4), collecting the signal intensity of the element to be tested, and calculating the mass fraction of the impurity to be tested. The determining method avoids the influence of irregularity or surface roughness of the alumina polycrystalline sample on the discharge and the detectionresult, and can be directly used for the determination of impurities of the high purity alumina polycrystalline material.

The invention provides a movable unmanned patrol check system. The movable unmanned patrol check system comprises a movable unmanned aerial vehicle base station and an unmanned aerial vehicle, whereinthe unmanned aerial vehicle is carried on the movable unmanned aerial vehicle base station; the movable unmanned aerial vehicle base station consists of an electric control center, a takeoff and landing platform, a rechargeable device, a mooring cable, a mooring power source and an automatic cable retracting and deploying module; the mooring cable is wound on the automatic cable retracting and deploying module; one end of the mooring cable is connected with the mooring power source; the mooring power source is connected with the rechargeable device through a conducting wire. The movable unmanned patrol check system has the advantages that on one hand, the problem of poor cruising ability of the unmanned aerial vehicle is solved, and the unmanned aerial vehicle can perform uninterrupted flight patrol check in 24h; the flight of the unmanned aerial vehicle can be operated in real time in a wireless remote distance way, and the patrol check range of the unmanned aerial vehicle is expanded; on the other hand, a flight operation signal center is used as a base station, so that the signal stability of the unmanned aerial vehicle is greatly improved, and the accident rate of the unmannedaerial vehicle in flight is greatly reduced.

The invention belongs to the technical field of motor accessories, and particularly relates to a servo motor encoder and a signal generating method. The technical problem that the precision is poor in the prior art is solved. The servo motor encoder comprises a shell. A photoelectric encoder and a rotating coded disc working in cooperation with the photoelectric encoder are arranged inside the shell. When the rotating coded disc rotates, a first set of signals can be generated by the photoelectric encoder, and a magnetic sensor chip and a rotating magnet working in cooperation with the magnetic sensor chip are arranged inside the shell; when the rotating magnet rotates, a second set of signals can be generated by the magnetic sensor chip. The signal generating method comprises the following steps of A signal generation and B differential signaling. The servo motor encoder and the signal generating method have the advantages that the design is more reasonable, precision is high, the cost is low, and practicability is high; the structure is simple, and manufacturing is easy; the signal stability is good, the service life is long, and the servo motor running stability is further improved; the method is simple, easy to control and low in running cost.

The invention discloses a device and a method for determining the rotating speed of a motor rotor by the residual voltage of a motor stator winding. The device comprises a microprocessor module, an input end of the microprocessor module is connected with a motor stator winding residual voltage detection circuit module, and the motor stator winding residual voltage detection circuit module comprises a voltage acquisition circuit module, a differential amplifier circuit module and a signal conditioning circuit module which are sequentially connected. The method includes the steps: firstly, acquiring and transmitting residual voltage signals of the motor stator winding; secondly, converting residual voltage line voltage signals UAB, UBC and UCA into residual voltage phase voltage signals UA, UB and UC, and performing Clark conversion to obtain a space phase angle phi j of a j group of residual voltage phase voltage space vectors; thirdly, performing linear fitting by the aid of a least square method to obtain a coefficient of a linear fitting straight-line equation; fourthly, determining the rotating speed of the motor rotor. The device is simple in structure, high in working stability and low in cost, and the residual voltage of the motor stator winding is effectively used.