830 results about "Vibration sense" patented technology

A configurable vibration sensor having a sensor circuit, an analog-to-digital converter and a processor is provided. The sensor circuit employs a vibration sensing element and a variable bandwidth filter controllable by the processor. In addition to the variable bandwidth filter, other configurable elements may also be employed in the sensor circuit, including a variable gain amplifier. These configurable elements allow the configurable vibration sensor to be configured for different vibration measurement applications when measuring vibrations from vibrating structures such as machinery and the like.

Bending wave vibrations propagating in a substrate of a touch input device are sensed. Provision is made for discriminating between sensed vibrations propagating in the substrate indicative of an intended touch and sensed vibrations propagating in the substrate indicative of an unintended touch. In response to the sensed vibrations propagating in the substrate indicative of the intended touch, a wake-up signal is generated. The wake-up signal is communicated to a control system of the touch input device for transitioning the control system from a sleep state to an operational state.

To provide an electromechanical signal selection device which can be miniaturized and highly integrated and which can selectively output only a signal of a predetermined frequency without providing any sensitive vibration sensing mechanism, and electric equipment using the electromechanical signal selection device. A micro-vibrator serving as a resonator is provided. The micro-vibrator can be excited by an external force to excite vibration of the micro-vibrator. A material whose physical property is changed in accordance with a structural change is used as the micro-vibrator. Thus, a sensitive electromechanical signal selection device is obtained.

A configurable vibration sensor comprising a sensor circuit, an analog-to-digital converter and a processor, where each sensor circuit comprises a vibration sensing element and a variable bandwidth filter controllable by the processor. In addition to the variable bandwidth filter, other configurable elements may also be employed in the sensor circuit, including a variable gain amplifier. These configurable elements allow the configurable vibration sensor to be configured for different vibration measurement applications when measuring vibrations from vibrating structures such as machinery and the like.

A MP3 player having an exercise meter is provided. The MP3 player includes a DSP processor for processing audio data and playing them; a vibration sensing component for generating a first signal following with a user's vibration and transmitting the first signal to the DSP processor; and a heartbeat sensor for sensing the heartbeat condition of the user to generate a second signal and transmit the second signal to the DSP processor. By using the DSP processor to process the first and the second signals to obtain the status of physical strength of the user, so that when the user carries the MP3 player for exercising, the MP3 player can play the music, and always monitor the exercising status of the user.

Bending wave vibrations propagating in a substrate of a touch input device are sensed. Provision is made for discriminating between sensed vibrations propagating in the substrate indicative of an intended touch and sensed vibrations propagating in the substrate indicative of an unintended touch. In response to the sensed vibrations propagating in the substrate indicative of the intended touch, a wake-up signal is generated. The wake-up signal is communicated to a control system of the touch input device for transitioning the control system from a sleep state to an operational state.

Methods and apparatus for monitoring a hydrocarbon production system. A fiber optic sensor system is deployed into hydrocarbon production system, so as to extend to location of interest within the system, for instance, in conjunction with a downhole component or a surface component. The fiber optic system detects vibration present in the production system component, and provides a signal indicative of the vibration to a signal acquisition and analysis unit. The vibration of the production component is analyzed and a change in system flow condition / property or a change in production system component integrity is determined.

Electronic devices and methods are disclosed that adaptively filter a microphone signal responsive to vibration that is sensed in the face of a user speaking into a microphone of the device. An electronic device can include a microphone, a vibration sensor, a vibration characterization unit, and an adaptive sound filter. The microphone generates a microphone signal that can include a user speech component and a background noise component. The vibration sensor senses vibration of the face while a user speaks into the microphone, and generates a vibration signal containing frequency components that are indicative of the sensed vibration. The vibration characterization unit generates speech characterization data that characterize at least one of the frequency components of the vibration signal that is associated with the speech component of the microphone signal. The adaptive sound filter filters the microphone signal using filter coefficients that are tuned in response to the speech characterization data to generate a filtered speech signal with an attenuated background noise component relative to the user speech component from the microphone signal.

Disclosed herein is a haptic device 100. The haptic device 100 includes: a substrate 20 receiving a touch of an input unit 10; a piezoelectric vibrator 30 provided on the substrate 20 and applying vibration; a piezoelectric vibration sensor 40 provided on the substrate 20 and sensing the variation in the vibration by the pressure of the touch; and a controller measuring the pressure of the touch through the variation in the vibration sensed by the piezoelectric vibration sensor 40, and has an advantage of implementing various interfaces varying depending on the magnitude of pressure by sensing the variation in vibration by means of the piezoelectric vibration sensor 40 when the input unit 10 touches the substrate 20 and measuring the pressure of the touch in the controller.

In a plasma processing system, a method for detecting an arc event on a substrate in a plasma chamber having a chuck is disclosed. The method includes positioning a substrate on the chuck. The method also includes providing a vibration-sensing arrangement in the plasma chamber, the vibration-sensing arrangement being configured for measuring arc-induced vibrations on the substrate, the arc-induced vibrations being generated when an arc strikes the substrate during plasma processing of the substrate in the plasma processing chamber.

The invention discloses a long-distance distributed optical fiber vibration sensing system and a method thereof. The system comprises an induction system for inducting outside vibration events and a detecting and controlling system for detecting and controlling vibration signals; the induction system is connected with the detecting and controlling system. The induction system comprises a light source, a pulse modulator, an optical fiber circulator, a first optical fiber amplifier, and a light switch of a first optical fiber filter. The detecting and controlling system comprises a plurality of optical-electrical converters and a system control unit; the system control unit collects output light of the converters, analyzing the collected signals and judges whether the alarm is needed according to the analysis result. The invention adopts the optical switch technology to adopt time-division processing on backward Rayleigh scattering light which is reflected back, the dynamic range of the system is large, and the sensible distance can be tens of kilometers as high as possible, even hundreds of kilometers; and the invention adopts phase detecting technology and optical time domain reflection technology and can greatly improve detecting sensibility of the system and positioning precision.

An imaging system and method are provided that use imaging information relating to positions of one or more retroreflectors attached to one or more surfaces of an object of interest to determine the shape and / or displacement of the surface or surfaces on which the retroreflector or retroreflectors are located. A variety of types of information may then be ascertained based on the determination as to the shape and / or displacement of the surface of the object, such as the value of some physiological parameter of a patient, internal and external pressure of an object, acoustical vibrations sensed by a microphone, positions of fingertips on a keyboard, etc.

An audio system comprises, according to one aspect of the invention, an audio frequency actuator coupled to a body so as to cause the body to radiate sound when an audio signal is supplied to the actuator by a controller, and an acoustic sensor coupled to said body or to an adjacent body so as to sense acoustic vibrations in said body, the sensor being connected to the controller, whereby the controller is arranged to change the audio signal supplied to the actuator according to the vibrations sensed by the sensor. Another aspect provides an audio system comprising an audio frequency actuator coupled to a body so as to cause the body to radiate sound when an audio signal is supplied to the actuator by a controller, and an acoustic sensor coupled to said body or to an adjacent body so as to sense acoustic vibrations in said body, the sensor being connected to the controller, whereby the controller is arranged to detect predetermined characteristics of the sensed acoustic vibrations and to output an alerting signal in response thereto.

A deep learning based distributed optical fiber vibration sensing type intelligent safety monitoring method includes: signal demodulation and disturbance positioning of a distributed optical fiber vibration sensing technique; demodulation pattern acquisition; sample library construction and network training for network model generation; online real-time disturbance type recognition with a networkmodel; network model online training optimization and the like. Safety monitoring is realized by adoption of detection lines or zone boundary communication cables, and the method has advantages of high extensibility, convenience in networking, low cost, lightning interference prevention and the like. In addition, the method takes full distributed advantages of distributed optical fiber vibration sensing to realize classification and recognition of disturbance information by the aid of a deep learning network, high intelligent recognition accuracy and online optimization performances are achieved, long-distance and large-range circuit safety alarm information management cost and onsite confirmation cost can be reduced, and engineering application process and development of the field of distributed optical fiber safety monitoring systems are greatly promoted.

A sensor system comprises a mat (20) for placement over a patient's mattress including a number of sensors (10) located in the mat. The sensors include a sensor housing (12), a sound vibration sensing element in the form of a PVDF membrane (13), and means for amplifying sensed sounds. The PVDF membrane is coated / covered with a typically latex, impedance matching layer (14). The sensor automatically provides for auscultation, in which the patient's own weight, from the patient lying on the bed, compresses their thorax against the membrane, compressing also the patient's clothing, bed sheet and mattress cover material between the two. The recoil in the mattress opposes the body mass, thus compressing the membrane against the thorax. The impedance matching layer on top of the membrane transmits fine breath sounds through to the membrane as the latex does not weaken or attenuate the fine breath sounds but transmits them to the PVDF membrane. However being flexible, it is not uncomfortable to lie on.

The invention discloses a distributed optical fiber vibration sensing system disturbance event identifying and positioning method. The method includes the steps that according to the position and the number of peaks with signals exceeding a certain threshold value, the number of the peaks occurring within the scope ranging from deltal / 2 in front of each point to deltal / 2 behind each point in an optical fiber is obtained, whether disturbance events exist or not is judged, and backgrounds are extracted with an amplitude limiting one-order inertia filtering method when the disturbance events do not exist; space-time terminals of the disturbance events are obtained according to the backgrounds when the disturbance events exist, fitting is carried out within the area range to obtain a background event probability density function, Gaussian mixture distribution parameters including the specific gravity, the expectations and the covariance matrix of Gaussian contents of the event peaks including the backgrounds in the area are solved through iteration of the EM algorithm, the parameters, the parameters of the background event probability density function and the total number of the event peaks in the area are fed into a classifier, the disturbance types are judged, and the expectations of the Gaussian contents represent the space positions of the events.

The invention discloses an optical fiber vibration sensing head, which consists of a vibration sensitive chip, a dual fiber collimator and an encapsulation shell, wherein the inside of the encapsulation shell under the dual fiber collimator is provided with a cavity, the vibration sensitive chip is arranged in the cavity and consists of micro light reflector, a silicon supporting frame and a substrate glass sheet; the silicon supporting frame is bonded with the substrate glass sheet; the micro light reflector is arranged in the silicon supporting frame; a damping air cavity is reserved between the micro light reflector and the substrate glass sheet; two sides of the micro light reflector is symmetrically provided with torsion shafts; and one end of each of the torsion shaft is connected with the silicon supporting frame. An MEMS process is used to integrate a MEMS vibration sensitive chip. Based on an asymmetric torsion micro light reflector structure, the MEMS vibration sensitive chip can be manufactured in batch. The torsion shafts are used as elastic elements, and the micro light reflector is used as a sensitive mass block to reflect vibration acceleration. The damping air cavity is used for controlling the damping characteristic of torsion. The invention has the advantages of batch production, low cost and high consistency.

The invention relates to the field of optical fiber sensing, specifically a phase-light time domain reflection device and method based on heterodyne detection phase demodulation. The device consists of a narrow linewidth laser, an optical fiber coupler with a coupling model of 1*2, a polarization controller, a sound-light modulator, an erbium-doped optical fiber amplifier, a narrow-band optical fiber filter, a first variable optical attenuator, a three-port circulator, a sensing optical fiber, an optical fiber coupler with a coupling model of 2*1, a photoelectric detector, a signal collection and processing module, an arbitrary waveform generator, a power amplifier, and a second variable optical attenuator. The device and method enable the heterodyne detection phase demodulation to be combined together, achieve external vibration sensing through direct phase demodulation, and are higher in sensitivity. In addition, the device and method employ a brand new direct phase modulation method to sense the external vibration, so the positioning method, compared with a conventional method, of each vibrating point is different.

An earthquake sensor and a control system is provided for sensing the presence of an earthquake event and for shutting off the flow of at least one utility service in response thereto. The earthquake sensor and control system includes a vibration sensor for sensing vibrations caused by an earthquake. A signal generator is provided for generating a utility flow stop signal in response to an earthquake induced vibration sensed by the vibration sensor. A utility flow control is provided for stopping the flow of the utility service in response to receiving the utility flow stop signal.

The invention discloses a distributed optical fiber vibration sensor based on the relay amplifying and sensing technology and a method thereof, belonging to the technical field of optical fiber vibration sensing. The system comprises a light source, an electro-optical modulator, a pulse driver, a light amplifier, a circulator, a polarizing beam splitter, a collector and a signal analysis processing system. The sensor is characterized in that the system also comprises a pumping laser light source and an optical remote sensing relay amplifying and sensing optical module. The pumping laser light source is arranged in the distributed optical fiber vibration sensing demodulation device and the optical remote sensing relay amplifying and sensing optical module is embedded between multistage sensing fibers. The passive optical modules of the pumping laser light source and optical remote sensing relay amplifying and sensing optical module perform long-distance connection through transmission fiber to form the light amplifier, the gain of the optical remote sensing relay amplifying and sensing optical module is utilized to overcome fibre loss, increase the intensity of the spontaneous Rayleigh scattering light of the optical fibre, enhance the signal-to-noise ratio of the distributed optical fiber vibration sensing system, enlarge the transmission distance of the system and increase the measurement accuracy of vibration events in the target area. The system is mainly used in the fields requiring long-distance measurement vibration signals such as perimeter safety precaution, border precaution, seismic detection and tsunami early warning.

An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; calculating knock intensity N based on a result of comparison between the detected waveform and a knock waveform model prepared in advance as a vibration waveform when knocking occurs; determining that knocking occurred when the knock intensity N is larger than a predetermined reference value; and determining that knocking has not occurred when the knock intensity N is not larger than the predetermined reference value.

A vibration-sensing field unit includes a base with at least one accelerometer, and a body mounted to the base. The base is composed essentially of a first material, while the body is composed essentially of a second material that is more flexible than the first material to reduce a vibration at the accelerometer caused by a mass supported by the body. In another embodiment, a vibration-sensing field unit includes at least one accelerometer and at least one ultrasonic transducer.

The invention discloses a railway rockfall early warning system and method. The railway rockfall early warning system comprise a fiber bragg grating vibration sensing part, a fiber bragg grating demodulating instrument and an analyzing and alarming device, wherein the fiber bragg grating vibration sensing part is provided with a fiber bragg grating suitable for generating strains along with the vibration of a track; the fiber bragg grating demodulating instrument is used for guiding light emitted by a light source to the fiber bragg grating, receiving light reflected back from the fiber bragg grating and outputting an electric signal reflecting wavelength variation, caused by the strains, of the reflected light; and the analyzing and alarming device is used for acquiring the wavelength variation information of the light reflected back from the fiber bragg grating so as to determine whether to give out an alarm on the fault of the track. The invention also relates to a railway rockfall early warning method, comprising the following steps of: providing the fiber bragg grating generating strains along with the vibration of the track; acquiring the electric signal reflecting the wavelength variation of the light reflected back from the fiber bragg grating through the fiber bragg grating demodulating instrument; acquiring the wavelength variation information of the light reflected back from the fiber bragg grating on the basis of the electric signal; and determining whether to give out an alarm on the basis of the wavelength variation information.

The invention provides a method and a system for on-line locating a power cable fault. The method is characterized by converting a vibration signal of a power cable into an optical signal by utilizing an optical cable which is parallelly and tightly laid with the power cable in an adhesion way, carrying out monitoring treatment for the optical signal by utilizing an optical fiber vibration sensing system, and finally obtaining the position of a fault point of the power cable by analyzing. According to the method for on-line locating the power cable fault, provided by the invention, an on-line mode is adopted, the technology of distributed optical fibers in a vibration measuring aspect is applied to high-voltage power cable fault point detecting and finding, the purpose of efficiently locating the fault point of the power cable under an on-line state is realized, and the method and the system have actual social benefit.

A horizontal linear vibration motor comprises a vibration component, an excitation component and a motor housing which are buckled into a whole, wherein the vibration component comprises elastic elements, a magnetic yoke, a vibration coil and a heavy block; the vibration coil is embedded in the inner surface of the magnetic yoke, so that the central axis of the vibration coil is parallel to the horizontal vibration direction of the vibration component; the plane where the circular current of the vibration coil is located is perpendicular to the central axis of the vibration coil and the horizontal vibration direction of the vibration component; the magnetic yoke is a hollow rectangular solid; the heavy block is a hollow rectangular solid and combined with the outer side of the magnetic yoke to move together with the magnetic yoke; the first fixing ends of the elastic elements are combined with corresponding side walls of a baseframe or the housing; the second fixing ends of the elastic elements are combined with corresponding side walls of the heavy block or the magnetic yoke; the first fixing ends are connected with the second fixing ends through elastic arms of the elastic elements to elastically support the vibration component. The horizontal linear vibration motor has the advantages of strong vibration sense, thinness, long service life and short response time.

The invention relates to a distributed fiber vibration sensing system capable of eliminating declining noises and a demodulation method of the system. The system comprises a signal generation module, a narrow linewidth laser source module, a frequency-sweeping light chopping pulse module, a circulator, a sensing fiber, a coherent reception module, a photoelectric conversion module and a digital signal processing module; a computer generates multiple digital band pass filters of different frequency ranges but not overlapped and combines original data segments from multiple frequency-sweeping detection light pulses to obtain a reflectivity curve of the sensing fiber; phase-shaft averaging is carried out on the reflectivity curve to obtain multiple interference-free and polarization-declining integrated reflectivity curves; delay differential processing is carried out on the integrated reflectivity curves to obtain phase differential curves; variances of the phase differential curves are solved to obtain a phase variance curve; and a vibration point is determined according to variances in the phase variance curve, and position and vibration waveform of the vibration point are obtained. According to the system and method of the invention, design is reasonable, the positioning accuracy is high, and space resolution and long detection distance can be obtained at the same time.

The invention relates to an optical fiber perimeter intrusion monitoring method based on image recognition. The monitoring method is completed by an optical fiber vibration sensing system. The system comprises detection cables which are connected together, a monitoring host and an upper computer. The monitoring method comprises the steps that vibration caused by outside intrusion is detected by the detection cables, and an optical signal is transmitted to the monitoring host; the monitoring host converts the received optical signal into an electrical signal, and then carries out sampling and analog-digital conversion on the electrical signal to acquire a discrete digital signal; the digital signal is transmitted to the upper computer; the upper computer processes the acquired digital signal to acquire processed signal feature amount to form one or more waterfall curves; according to the form of the waterfall curve, image pattern recognition is carried out; and an intrusion event is determined, intrusion alarm is triggered. According to the optical fiber perimeter intrusion monitoring method provided by the invention, additional equipment is not needed; real-time intrusion recognition is realized without a storm database; and the method has the advantages of high intrusion recognition rate and low false alarm rate.

The invention discloses a production equipment on-line monitor and fault diagnosis system and method based on the wireless network. The system comprises a wireless detecting meter, a data server and a monitor terminal. The wireless detecting meter is used for collecting a vibration sensing signal, a rotation speed signal and a temperature signal of a rolling bearing in production equipment in real time, processing and encrypting the signals and wirelessly sending the signals in a data package mode. The data server and the monitor terminal are connected with the wireless detecting meter in a wireless mode. According to the fault diagnosis mode, when the monitor terminal monitors a data package, the maximum value of vibration speed of the rolling bearing is calculated in real time, it represents that a fault occurs on the rolling bearing if the maximum value is greater than a set value, and it represents that the rolling bearing is normal if the maximum value is smaller than the set value; when the fault occurs on the rolling bearing, the fault feature frequency of the rolling bearing is extracted according to the wavelet analysis method so that the fault type and fault positions of the rolling bearing can be determined. The production equipment on-line monitor and fault diagnosis system and method based on the wireless network have the advantages that the operating condition of the production equipment can be monitored in real time, and reasons of faults can be known for sure.