69 results about "Shock detector" patented technology

A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and control circuitry including a shock detector. The control circuitry is operable to detect a resonant frequency amplitude (RFA) of the shock detector, adjust the shock detector in response to the RFA, and take protective action in response to the shock detector.

A helmet includes a head enclosure with an open cavity for the head of a user and a shock detector attached to the head enclosure that provides a signal when the head enclosure is subjected an impact exceeding a predetermined level.

A method and system for reducing operational shock sensitivity of a MEMS device includes a closed-loop control circuit for controlling the MEMS device and a shock detector for detecting a shock experienced by the MEMS device. The closed-loop control circuit includes a movable MEMS structure, a detector for sensing a position of the MEMS structure and for providing a first feedback signal related to the sensed position, and a processor for receiving the first feedback signal and for providing a control signal used to control the MEMS device. The shock detector, which according to a preferred embodiment is the MEMS structure itself, is used for detecting the shock experienced by the MEMS device and for generating a second feedback signal, which is used to alter the control signal such that a response of the closed-loop control circuit to the shock is minimized.

The invention provides an intrusion prevention system of fiber grating perimeter and an alarm method thereof; the system comprises a piece of on-site optical fiber detecting equipment and a piece of control equipment; the on-site optical fiber detecting equipment comprises detecting passages, and each detecting passage comprises cascaded optical fiber vibration detectors; the control equipment comprises a fiber grating signal demodulator and an alarm management computer, which are connected with each other; and the detecting passages are connected with the fiber grating signal demodulator. The alarm method comprises the steps of: firstly, updating a fiber grating wavelength reference value; and then, performing time domain processing on the wavelength sequences received by the fiber grating signal demodulator to distinguish the operation states of the optical fiber vibration detectors, and entering a pre-alarm state if the operation states of the detectors are normal and an abnormal signal is captured; and distinguishing the frequency domain of the wavelength information of the abnormal signal at the pre-alarm state, and retaining the effective illegal intrusion behavior information to finish the alarm process. The intrusion prevention system of the invention has the advantages of high sensitivity, good alarm performance and low false alarm rate.

A plaything including unit blocks connected to each other using a connection tube is provided. Each unit block includes a spherical capsule and a plurality of connection members protruding at regular angular intervals from the surface of the spherical capsule. A shock detector emitting light in response to an external shock is installed inside the unit block. When connecting the unit blocks, the connection members of different unit blocks are inserted into the same connection tube from opposite directions. A structure formed by only one unit block or by connecting two or more unit blocks may be used as an educational tool or a shaking tool shaken in a manner of jig fishing.

A shock detector having an electrical detector having a set of water immersible electrodes for detecting hazardous water conditions through the determination of the presence of either an electrical current in a body of water, a voltage in the body of water or a voltage gradient in the body of water and then providing an alert to the existence of hazardous electrical conditions in the body of water which in some cases may transmitted to a power source to shut off a power source thereby removing the hazardous water condition.

The invention discloses a coal mine water burst down-hole full-space real-time continuous monitoring early-warning method which comprises the steps that 1. a group of slight shock detectors are arranged on a coal mine down-hole excavating working face or near a construction weak zone, and all slight shock events in a certain time period in a monitoring zone are subjected to full-space real-time continuous monitoring; 2. all the slight shock events are subjected to time locating and space locating; and 3. according to a space profile distribution graph in the step 2, a slight shock event dense distribution zone in a water source layer is subjected to incubation period blue early warning, a slight shock event dense distribution zone in a water insulating layer is subjected to development period yellow early warning, and a slight shock event dense distribution zone near the excavating working face is subjected to burst period red early warning. The method can carry out omnibearing real-time continuous monitoring and effective early warning on a water source layer, a water insulating layer and an excavating layer, so that real-time judging of water burst time, the water burst point position and the water burst type is achieved, and significance is achieved on reducing and avoiding of water burst accidents and quick treating of water burst.

The invention discloses an intelligent handcuffs and a remote management system thereof. The intelligent handcuffs comprise a camera, a satellite positioning module, a pulse sensor, a shock detector, a horn, a telephone receiver, a wireless communication module and a processing control module. The processing control module is used for sending a scene image and an alarm signal through the wireless communication module when the satellite positioning module detects the intelligent handcuffs leave a set region, or the pulse sensor detects the heart rate of a person wearing the intelligent handcuffs is abnormal, or the shock detector detects the intelligent handcuffs shake. The intelligent handcuffs can send an alarm when the person wearing the intelligent handcuffs is abnormal in behavior to remind policemen to take measures in time, thereby effectively preventing the person wearing the intelligent handcuffs from escaping.

An elevator device, which controls the operation of the elevator when an earthquake or strong wind occurs, and predicts and calculates the signal detected by the vibration detector (5) installed on the upper part of the elevator passage (20) or the upper part of the building. (20) shake responses of long-scale components such as the main sling (7) at various time points, and issue control instructions based on the calculation results. The elevator equipment of the present invention can detect vibration of long-scale components such as the main rope during earthquakes and strong winds with high precision, and perform controlled operation.

The present invention provides a method for detecting acoustic shock in an audio input signal (s(t)), comprising the steps of monitoring the input signal (s(t)) in the time-domain. Thereby detecting the signal floor (Sn), detecting the peak level of the input signal (L), detecting the attack time of the input signal (t1-t0), detecting the duration of the input signal (T). Based on those detections, determining a shock contrast level (SCL) as difference between the peak level (L) and the signal floor (Sn), determining a shock index (SI) by use of a shock index normalization constant (σ) and comparing the shock contrast level (SCL) and the shock index (SI) with respective thresholds and indicating an acoustic shock if one or both thresholds are exceeded. Thus, the present method provides a quick and reliable shock detector that operates in the time-domain. The shock detection takes place with zero time delay, or even predicts the shock before it fully goes through the signal processing.

A disc drive apparatus (1) comprises; a) actuator means (50) for controlling the positioning of an element (34) of a scanning means; b) error signal calculating means (111, 112) for receiving a read signal (SR) and generating at least one error (RES; e(k)); c) a state estimator (120) for receiving said error and for outputting derived signals (s1, s2, s3); d) shock detector means (130) for generating a shock indication signal (SIS); e) actuator control signal generator means (190) designed to perform sliding mode control (SMC), having at least one variable control parameter, for generating an actuator control signal (RAD; u(k)) on the basis of a second one (s2) of said derived signals; f) the actuator control signal generator means setting a first value for said variable control parameter during normal operation, and setting a second value for said variable control parameter when said shock indication signal indicates the occurrence of a shock.

A vehicle security system may include at least one security sensor and a security controller connected thereto, and a siren which also serves as a shock sensor. The siren may include a housing, a siren security electrical signal generator circuit carried by the housing for generating an electrical siren security alarm signal responsive to the security controller, and a shock detector circuit carried by the housing for processing an electrical shock sense signal for the security controller. The siren also preferably includes an electrical/mechanical (E/M) transducer carried by the housing for sounding a siren security alarm responsive to the electrical siren security alarm signal, and for generating the electrical shock sense signal responsive to mechanical shock. In other words, the E/M transducer and associated circuitry provide the dual alternate functions of sounding the siren security alarm and sensing for shocks to the vehicle.

A shock awareness system including a shock detector for measuring an electrical condtion in a body of water and a remote station in communication with the shock detector with the shock awareness system displaying a measured electrical condtion in the body of water in relation to a known hazardous electrical condtion in the body of water to enable an operator to determine a level of danger in a body of water.

The invention provides a vibration detector capable of multipoint detection. Vibration switches serve as vibration sensing components, modules internally provided with the vibration switches are connected in series via a cable, and a signal processor carries out sampling and analysis and provides alarm output.

The invention discloses a control cabinet with the anti-theft function. The cabinet comprises a cabinet body. A top plate is fixedly arranged at the top of the cabinet body. A spring is fixedly arranged on the upper surface of the top plate. A pressing rod is arranged in the spring in a penetrating manner. The pressing rod penetrates through the top plate and extends into the cabinet body. A pressing sleeve is fixedly arranged on the top plate of the pressing rod. Two groups of clamping jaws are symmetrically arranged at the bottom of the pressing sleeve. A limiting ring is fixedly arranged onthe upper surface of the top plate and outside the spring. One end, extending into the cabinet body, of the pressing rod is movably connected with a connecting rod. A stand column is fixedly arrangedon the lower surface of the top plate and located on one side of the pressing rod. One end, away from the pressing rod, of the connecting rod is movably connected with the bottom of the stand column.Two sets of installation grooves are formed in one side of the outer portion of the cabinet body. A vibration detector is arranged in the installation grooves in a sliding mode. A mechanical anti-theft device is arranged. In this way, even if a door lock is damaged, the cabinet body still cannot be opened. An electronic anti-theft device with the alarm function is arranged, so that the anti-theftfunction can be started in time.

A device capable of detecting vibration/shock includes a laser diode capable of transmitting a laser beam and a vibration/shock detector capable of detecting vibration or shock, wherein the laser diode and the vibration/shock detector are formed on one chip.

The invention provides handheld type human body information collecting equipment. The handheld type human body information collecting equipment is integrated with the functions of a camera, an imagingradar detector, an X-ray scenograph, a non-contact type card reader, a sound pickup, a wireless signal detector, an infrared detector, a non-imaging radar detector, a microwave detector, a vibrationdetector, a non-contact type temperature measurer, a human body odor detector, a drug detector, an explosive detector, a hypertoxic object detector, a human body odor sampler, a human body substance sampler and a human body accessory sampler on the basis of the existing handheld type security check equipment, and the handheld equipment with the functions can be manufactured by referring to the appearance, type and use method of the existing handheld type security check equipment. The handheld type human body information collecting equipment has the advantages that more human body information and related information, such as images, IC (integrated chip) cards and mobile phone information, can be collected under the condition of security check occasion and that the equipment is arranged nearthe collected object and is cooperated by the collected object; the handheld type human body information collecting equipment can be applied to various security check occasions, such as airports.

A shock detector for an optical disc recorder and method for controlling the recording using a shock signal. The shock detector includes a first detecting unit for detecting the amplitude of a first kind of reference signal passing through a band-pass filter and outputting a first detecting signal, a second detecting unit for detecting the level of a second kind of reference signal and outputting a second detecting signal, a third detecting unit for detecting the revolution of a third kind of reference signal and outputting a third detecting signal, and a judging unit for receiving the first detecting signal, the second detecting signal and the third detecting signal, and enabling a shock signal when the first detecting signal, the second detecting signal and the third detecting signal are simultaneously enabled. Therefore, the shock detector does not need an additional shock sensor.

The invention provides a vibration detecting device for an on-load tap-changer. The vibration detecting device comprises a vertical post fixed on the ground; a lever support is arranged on the vertical post; a lever is pivoted on the lever support; a probing pin is arranged on one side of one end of the lever; the probing pin is provided with a spring opposite to the other side of the lever; the other end of the spring is fixed on the vertical post; a vibration detector for converting vibration into an electric signal is arranged on the other side of the lever; the probing pin end of the lever serves as a power arm end, and the vibration detector end of the lever serves as a resisting arm end; and the vibrating detector is electrically connected with an alarming control module. The vibration detecting device can effectively monitor the running state of the on-load tap-changer and gives out an alarm once the on-load tap-changer is subjected to failure.

The present invention relates to an optical recording and reproducing device comprising an optical pick-up unit, position means for moving roughly the optical pick-up unit with respect to a desired position on an optical disc, an actuator for moving the optical pick-up unit relative to the position means in a radial direction of the optical disc, and a servo processor for delivering a control signal (u(k)) from a measured radial error signal (x(k)) derived from the optical pick-up unit. Said servo processor further comprises: —a state estimator (SEST) for delivering an estimated radial error signal ( ) and a predicted radial error signal ( ) on the basis of the measured radial error signal (x(k)) and of the control signal (u(k)); and—a shock detector (SDET) for delivering a shock indication (S_out) on the basis of the estimated radial error signal, of the predicted radial error signal, and of a sum (CA(k)) of the signals delivered by the at least two regions of the optical sensor.

The present invention provides a smashed detection method and a smashed detection system applied to an ATM. The smashed detection method comprises the following steps: A, simultaneously acquiring a sound signal and a vibration signal within the range of a monitoring area of an ATM; B, judging whether the vibration signal is a vibration signal indicating that the ATM is smashed according to the intensity of the vibration signal, if the vibration signal is a strong vibration signal, entering a step D, and if the vibration signal is a weak vibration signal, entering a step C. The smashed detection method of the present invention has the beneficial effects that: a sound and vibration fusion method is adopted, a sound signal processing technology is introduced, and multiple judgments are performed on the basis of the vibration signal, thus the phenomena of false alarm and missing alarm caused by that only a vibration detector is used in the ATM at present can be effectively solved; in addition, identification judgment is added, so that an identification result is more reliable, and detection for other destroy sounds is also added, thus alarm judgment can be effectively made for the situation that the ATM is drilled and sawed.

The invention discloses a three-dimensional garage with an anti-theft alarm function. The three-dimensional garage comprises a garage body, a garage door mounted at the doorway of the garage body, and a lighting lamp mounted in the garage body. The garage door comprises beams, a rolling door, a hoisting motor and a control device. The beams comprise the left beam and the right beam which are fixedly mounted on the left side and the right side of the doorway of the garage body correspondingly. A hoisting shaft is transversely mounted at the tops of the left beam and the right beam. One end of the hoisting haft is connected with an output shaft of the hoisting motor. The rolling door is mounted between the left beam and the right beam and wound on the hoisting shaft. The control device comprises a control panel, an infrared emitter, an infrared receiver, a controller, an upper limiting switch, a lower limiting switch, an infrared detector, a vibration detector and an alarm. The three-dimensional garage is simple in structure, convenient to use and high in automation degree.

An electronic device including: a calculation unit configured to generate a signal representative of a physical magnitude, for a motor driving a display device, the motor including two terminals, one positive and one negative, via which the calculation unit controls the motor; at least one shock detection circuit connected between the calculation unit and one terminal of the motor for detection of an external shock applied to the motor. The shock detection circuit includes a comparison part comparing an induced voltage generated in the motor following a shock to a predetermined reference voltage to identify a shock, and a selection part.

The invention discloses a safety warning device for power detection, which, in the structure, comprises a shell, a warning sign, solar cell controllers, an outdoor infrared detector, a vibration detector, a microphone and a power detection device, wherein the shell is rectangular; the warning sign is embedded in the middle part of the front surface of the shell; the two solar cell controllers arearranged at the upper part and the lower part of the left surface of the shell and are symmetrical; the solar cell controllers are connected with the shell through bolts; and the outdoor infrared detector is arranged at the left side of the upper surface of the shell and is electrically connected with the shell. The safety warning device for power detection has the beneficial effects that when thedevice is in low power or no power, the power detection device is automatically started to remind charging, the device is ensured to have enough power, missed work report or error work report causedby not enough power in the case of work can be effectively avoided, and the personal safety factor of a protection work person is also improved.

The invention provides a security inspection machine having an information collection function. On the basis of an existing security inspection machine, functions of a camera, an imaging radar detector, a non-contact card reader, a pickup, a wireless signal detector, an infrared detector, a non-imaging radar detector, a microwave detector, a vibration detector, a non-contact temperature measuringinstrument, an object odor detector, a drug detector, an explosive detector, a poisonous material detector, an object odor sampler, an object material sampler and an object appurtenant sampler, and references can also be made to appearance styles and using methods of an existing security inspection machine to make a security inspection machine information collection device having the aforementioned function. According to the security inspection machine having the information collection function, more objects and related information such as images, IC cards and mobile phone information can be collected under the conditions that a security inspection occasion is close to and matched with a collected object. The collection device can be used for information collection on various security inspection occasions such as an airport.