293 results about "Pulse measurement" patented technology

A pulse rate sensor that includes an accelerometer for measuring periodic motion and a piezo sensor for detecting erratic motion is capable of more accurately determining pulse rate by accounting for these types of motion. The pulse rate sensor in accordance with the present invention diminishes pulse rate signal degradation due to erratic motion through a combination of algorithms that control signal boosting, waveform refinement and signal noise suppression.

A pulse management system configured to perform a plurality of pulse measurements on each of a plurality of pulses of an acquired signal and to store results of the pulse measurements in an accessible data structure. The pulse management system includes a pulse analyzer that searches the data structure for pulses of the acquired signal that satisfy operator-provided search criteria. Similarly, the pulse analyzer can sort the selected subset of pulses based on sort criteria provided, for example, by an operator. The pulse analyzer can provide the operator with a user interface environment in which the operator specifies the search and sort criteria and in which the pulse analyzer displays the selected pulses with their associated pulse measurement results. The operator can advance through the selected pulses in any manner desired to display different pulses together or separately. The pulse analyzer thereby provides an operator with the capability to gain insights into a large number of acquired pulses through the selection of individual pulses meeting desired characteristics or relative time of occurrence, through the filtering or selection of pulses meeting specified criteria, and through the arrangement of those pulses according to the same or different criteria.

The present invention provides a non-contact photoplethysmographic (PPG) pulse measurement device, and oxygen saturation and blood pressure measurement devices using the PPG pulse measurement device. The PPG pulse measurement device includes a sensing unit including at least two light emitting units for emitting light into a human body without making direct contact with skin, and a light receiving unit for sensing reflected light. A signal separation unit separates output of the sensing unit into a ripple component and a ripple-free component. A microprocessor unit monitors the ripple-free component and compares the ripple-free component with a DC signal value. A luminance adjustment unit adjusts luminance of the light emitting units. A filter and amplification unit eliminates noise from the ripple component. An A / D conversion unit converts output of the filter and amplification unit into a digital signal. A signal transmission unit transmits output of the A / D conversion unit.

The invention relates to the field of shaped pulse measurement, in particular to a spectrum shearing interferometer suitable for measuring shaped pulses. A plane grating, a first concave face reflecting mirror, a double-slit baffle, a first reflecting mirror and a second reflecting mirror are used for forming a special 4f zero dispersion compressor, the distance between the plane grating, the first reflecting mirror and the second reflecting mirror and the first concave face reflecting mirror is equal to the focal length of the first concave face reflecting mirror in the 4f zero dispersion compressor, the mode that the 4f zero dispersion compressor is added with the double-slit baffle is used for acquiring two quasi monochromatic long pulses, the two quasi monochromatic long pulses and a pulse to be measured are made to be in sum frequency. According to the mode, a shearing amount omega and the band width delta omega of an auxiliary pulse segment participating in sum frequency can be prevented from varying along with the change of the characteristics of the pulses to be measured, the shearing amount omega can be changed conveniently to measure the same pulse, the corresponding phase difference of each frequency of the pulse can be solved independently, and therefore the shaped pulses with various characteristics can be measured accurately.

Aspects of the subject disclosure are directed towards a video-based pulse / heart rate system that may use motion data to reduce or eliminate the effects of motion on pulse detection. Signal quality may be computed from (e.g., transformed) video signal data, such as by providing video signal feature data to a trained classifier that provides a measure of the quality of pulse information in each signal. Based upon the signal quality data, corresponding waveforms may be processed to select one for extracting pulse information therefrom. Heart rate data may be computed from the extracted pulse information, which may be smoothed into a heart rate value for a time window based upon confidence and / or prior heart rate data.

The invention provides a high-precision method and device for measuring an interval between positive time and negative time. The device comprises a signal shaping and measuring gate extracting unit, a synchronization and interpolation unit, a clock counting unit, a storage unit and a data processing unit, wherein the signal shaping and measuring gate extracting unit, the synchronization and interpolation unit, the clock counting unit, the storage unit and the data processing unit are in connection with one another and in communication with one another. The signal shaping and measuring gate extracting unit conducts comparing and shaping on input signals according to a trigger level, converts measured signals into ECL level signals, and extracts gate signals corresponding to the measured signals through an ECL trigger. The synchronization and interpolation unit samples the two routes of gate signals through a counting clock. By means of the scheme, various types of signal input can be achieved, and the wide input dynamic range can be supported; a channel circuit is obtained through a high-speed ECL device, the channel bandwidth is large, narrow-pulse measurement can be achieved, the minimum measurable pulse width can reach 2.5ns, and the measurement resolution ratio can reach 40ps.

The invention discloses a wireless measurement while drilling system and method. The system comprises an underground instrument and a ground system. The underground instrument comprises an electromagnetic wave measurement while drilling device used for carrying out measurement while drilling through electromagnetic waves, a drilling fluid pressure pulse measurement while drilling device used for carrying out measurement while drilling through drilling fluid pressure, and a transmitting and receiving machine connected to the electromagnetic wave measurement while drilling device and the drilling fluid pressure pulse measurement while drilling device and used for controlling switching of the work modes of the underground instrument according to signals from the ground system. The work modes comprise an electromagnetic wave transmission mode and a drilling fluid pressure pulse mode. The ground system is compatible with demodulating and decoding of the two work modes and is used for carrying out digital signal processing on the signals generated under the electromagnetic wave transmission mode and / or the drilling fluid pressure pulse mode. According to the system, well logging combination of different transmission modes is achieved, and underground working of the two modes can be selected at the same time or underground working of one mode can be selected according to needs. The system is flexible, compatible and high in applicability.

For training adjustment in sports, particularly running sports, an apparatus and appertaining method are provided with which a simple, non-invasive and automatic determination of the lactate balance point is possible. The apparatus comprises a motorized treadmill for which a running speed can be predetermined by a control unit, whereby the control unit is connected to a pulse measurement device to supply a measurement value of the heart rate of a test person, and whereby the control unit comprises a module to determine the lactate balance point, this module being fashioned to successively increase the running speed in the training course, to register the time curve of the heart rate, and to determine the lactate balance point of the test person via evaluation of the dependency of the heart rate on the running speed.

The invention provides an FPGA (field programmable gate array) control-based all-solid-state high-voltage nanosecond pulse generator, and belongs to the field of bio-electromagnetic technology. The nanosecond pulse generator mainly comprises a power supply system, a pulse forming system, a pulse measurement system, an FPGA control system, a signal conversion system and a portable computer. In the generator, the output pulse amplitude is between 0 and 10kV, the pulse width is between 200 and 1000ns, the pulse frequency is between 1 and 1000Hz, the falling edge is between 30 and 40ns, the number of pulse is between 1 and 1000, and particular parameters are determined according the requirement of tumor treatment. The FPGA control-based all-solid-state high-voltage nanosecond pulse generator has the characteristics of intelligent regulation of pulse parameters (pulse amplitude, width, frequency and number), optical fiber transmission, high parameter accuracy, long service life, small size, low failure rate, good security and the like; and the generator outputs high pulse frequency, and is advantageous to quick searching of the optimal window parameters for inducing tumor cell apoptosis by virtue of intelligent regulation, so that the tumor treatment effect is improved. The FPGA control-based all-solid-state high-voltage nanosecond pulse generator can be widely applied to tumor treatment.

A pulse rate sensor that includes an accelerometer(108) for measuring periodic motion and a piezo sensor(106) for detecting erratic motion is capable of more accurately determining pulse rate by accounting for these types of motion. The pulse rate sensor(101) in accordance with the present invention diminishes pulse rate signal degradation due to erratic motion through a combination of algorithms that control signal boosting, waveform refinement and signal noise suppression.

The invention relates to very precisely measuring changes in thickness of pipe walls to determine corrosion rate prior to any significant corrosion loss. The thickness is determined by ultrasonic testing where many measurements of the wall thickness are taken at the same spot by a fixed sensor and errors associated with noise and temperature changes are substantially eliminated. A highly sensitive receiver converts each reflected pulse to waves that are averaged with other pulse measurements. The resulting average wave is analyzed so that each waveform is analyzed to identify the extrema and inflection points of each reflected pulse. The resulting analysis provides a far more accurate determination of the time between reflected pulses. As a result, a far more accurate picture of corrosion at the location of the wall of the pipe can be determined within weeks with a high degree of confidence.

The invention relates to a well drilling method of a through tubing of a gas lift under-balanced coiled tubing, which is applied in the technical field of petroleum well drilling. The through tubing operation way of the coiled tubing is adopted for carrying out under-balanced well drilling or low-pressure well drilling on target well sections at the lower part in a shaft with a drilled upper borehole, wherein the target well sections are a vertical well, a directional well or a horizontal well. The method has the following effects: the adoption of the through tubing operation of the coiled tubing can form three circulation channels by utilizing the coiled tubing, an oil tube and a sleeve, and a matching pipe column has good universality, does not need a special drilling column or an inner tube and does not need to use a rotary blowout preventer and other special equipment; a gas injection channel and a slurry injection channel are independent mutually, thereby being capable of more conveniently controlling the well bottom pressure and the under-pressure value and using an underground power drilling tool and a slurry pulse measurement system which are applicable to slurry well drilling to carry out well drilling operation and trajectory control; and the method does not need to be connected with a single and can keep the continuous circulation during the tripping process and the drilling process, and realize the full-process controllable under-balanced well drilling operation and the full-process controllable low-pressure well drilling operation.

There is provided a distance measuring apparatus, which can attain a distance compensation of a high precision and can be stably operated by using a cheap circuit, without any arrival at a supersaturated state for a great reflected light intensity, while a gain of an amplifying circuit is made higher, in order to accurately detect even a weak reflected light. The apparatus comprises: a light source for outputting a pulsed measurement light towards a measurement target object; a light receiver for detecting the reflected light from the measurement target object; and a calculator for calculating the distance from the measurement target object on the basis of the delay time between the output timing of the measurement light and the detected timing of the reflected light by the light receiver, and a light receiver 5 is composed of a photodiode PD for photo-electrically converting the reflected light, a diode D that is connected in series to the photodiode PD and clamps the light current generated in the photodiode PD, and an amplifying circuit 50 for amplifying the output of the photodiode PD, and it contains an integration processor for integrating the output of the amplifying circuit 50 and a distance compensator for compensating the distance in accordance with the output of the integration processor.

A device for inducing apoptosis of tumor cell with high voltage nanosecond pulse belongs to technology field of electric impulse for treatment of tumor. The inventive device mainly comprises high voltage direct current module, pulse formation system, pulse measurement system, computer system, and power system. Amplitude value of high voltage nanosecond pulse is continuously regulated or preset between 0-9.9kV, repetition frequency is continuously regulated or preset between 2-100Hz, width is continuously regulated or preset between 200ns-1 mu s by separating to 7 grades, and numbers is regulated or preset according to treatment requirement. As the inventive device can induce apoptosis of tumor cell, is an unalloyed physical method, has no requirement of medicament assistance, thus can completely avoid toxic and adverse side effect of chemotherapeutics during treatment and adverse reaction such as inflammation, pain, ulcer and stammer, therefore the inventive device can be widely used in oncotherapy and treatment of removing polypus and redundant grease and vulvopathy.

A gamma ray detector assembly for a borehole logging system that requires the measure of gamma radiation with optimized gamma ray energy resolution and with fast emission times required to obtain meaningful measurements in high radiation fields. The detector assembly comprises a lanthanum bromide (LaBr3) scintillation crystal and a digital spectrometer that cooperates with the crystal to maximize pulse processing throughput by digital filtering and digital pile-up inspection of the pulses. The detector assembly is capable of digital pulse measurement and digital pile-up inspection with dead-time less than 600 nanoseconds per event. Pulse height can be accurately measured (corrected for pile-up effects) for 2 pulses separated by as little as 150 nanoseconds. Although the invention is applicable to virtually any borehole logging methodology that uses the measure of gamma radiation in harsh borehole conditions, the invention is particularly applicable to carbon / oxygen logging.

A mobile terminal (10) of the present invention has a sensor (15) for detecting a pulse, in an upper end portion of a back surface of a main body of the mobile terminal (10). The sensor (15) is constituted by a light-emitting element and a light-receiving element. A position of the sensor is determined so that a force acting on the sensor falls within a range from 50 gf to 200 gf in a case where the mobile terminal is supported at its lower end portion and at the sensor by a fingertip. Thus, the present invention provides the mobile terminal (10) which can be always carried with a user and which realizes easy and stable pulse measurement.

The invention discloses a ranging method based on measurement of the laser pulse flight time. According to the ranging method based on the measurement of the laser pulse flight time, based on the synchronous clock pulse measurement method, a self-adaptive gradient adjustment slope generator and a differential amplification circuit are adopted, not only can the time duration of the part, synchronous with a system clock, in the laser pulse flight time be accurately measured, but also that the time duration of the part, not synchronous with the system clock, in the laser pulse flight time can also be measured extremely accurately, and thus accurate measurement of a target distance is achieved. The time difference ta between the moment when laser is emitted and the nest rising edge of the system clock and the time difference tb between the moment when the laser returns and the next rising edge of the system clock are linearly converted into a voltage V1 and a voltage V2 respectively, a digital value in linear proportion to ta-tb is output after differential amplification and AD conversion, calculation errors caused by data truncation can be effectively avoided, measurement errors caused by factors such as circuit nonlinearity can be effectively reduced through self-adaptive gradient adjustment conducted through the slope generator, and the ranging method is suitable for ranging occasions with the high accuracy requirement.

A signal processing apparatus includes a differential processing unit to differentiate a reflection signal corresponding to a pulse measurement beam that is periodically scanned in a polarized manner; an arithmetic unit to obtain, with a rising time of a first-order-differential reflection signal as a reference, a barycentric position of the first order differential reflection signal as a detection time of a reflected beam, and to calculate a distance to a measured object based on a time difference between an output time of the measurement beam and the detection time of the reflected beam; and a waveform determining unit to determine whether the reflected beam includes a plurality of overlapping reflected beams from a plurality of measured objects, based on rising and falling characteristics of the first-order-differential reflection signal and based on a rising characteristic of a second-order-differential reflection signal obtained by the second order differential of the reflection signal.

A stress management device is formed in an integrated design that enables pulse measurement, display of results and a power supply gathered into a small finger clip device. The stress management device includes a non-invasive infrared sensor that identifies and measures pulse rate variability and utilizes that information to calculate the power spectrum distribution and create a curve of the results multiple times per second. The device incorporates a display screen on which a graphic image of a pair of lungs filling and emptying to encourage the user into a predetermined breathing pattern known to reduce stress levels during a training period. After the completion of the training period, the device presents a score reflecting the percentage of times the user achieved high, medium and low relaxation states, and a pie chart reflecting the distribution of the states of relaxation calculated during the training period.

A mobile terminal (10) of the present invention has a sensor (15) for detecting a pulse, in an upper end portion of a back surface of a main body of the mobile terminal (10). The sensor (15) is constituted by a light-emitting element and a light-receiving element. A position of the sensor is determined so that a force acting on the sensor falls within a range from 50 gf to 200 gf in a case where the mobile terminal is supported at its lower end portion and at the sensor by a fingertip. Thus, the present invention provides the mobile terminal (10) which can be always carried with a user and which realizes easy and stable pulse measurement.

A real-time FROG system provides ultra fast pulse measurement and characterization. The system includes direct, integrated feedback that measures how well the system is retrieving pulses and tracking changes in the pulse train. This feedback is provided in real time and may be in the form of the FROG trace error, the display of the measured and retrieved FROG trace, accuracy of background subtraction or other quality measurement. The system includes preprocessing options that can be used to adjust the dynamic range of the measured signal or to perform different types of filtering. The preprocessing of the FROG trace precedes phase retrieval processing and improves the quality of pulse retrieval.

The invention discloses a reliable time scale pulse measurement method, which comprises the following steps: 1) converting a 10MHz frequency signal of a precise clock source, a standard 1PPS signal and 1PPS, 1PPM and 1PPH signals to be measured to pulse signals; 2) carrying out frequency doubling on the 10MHz frequency signal of the precise clock source for obtaining a 100MHz frequency signal, and taking the 100MHz frequency signal as the working frequency of an FPGA; simultaneously carrying out frequency division on the standard 1PPS signal and respectively obtaining a 1PPM reference signal and a 1PPH reference signal; and 3) measuring the precision of the 1PPS, the 1PPM and the 1PPH signals to be measured according to the reference signals of 1PPS, 1PPM and 1PPH under the working frequency of 100MHz. The method can realize the high-speed and high-efficient counting operation by adopting a field programmable logic sequence, realize the multi-path and multi-group pulse fast detection, and send the detection result to a user and is characterized by stable performances and convenient maintenance.

A pulse measurement device according to an embodiment comprises: a pulse sensor which senses a user's pulse while in contact with the user's temple, and outputs the sensed result as a sensing signal; a signal processing unit which processes the sensing signal and outputs the processed result as a data signal; and a signal conversion unit which converts the data signal from an analogue form to a digital form and outputs the converted data signal as a pulse signal.

The invention is applicable to the technical field of computers and provides a method and a device for measuring the human body pulse. The method comprises the following steps that: multiple frames of light transmission finger bitmaps are continuously collected according to the preset time intervals; the red value saturation of the pixel points in the pulse measurement region in each frame of finger bitmap is obtained; a red value saturation rectangular coordinate system adopting the horizontal axis for representing pixel point sequence numbers and adopting the vertical axis for representing pixel points is respectively built for each finger bitmap, in addition, dotting is carried out in the rectangular coordinate system according to the red value saturation in the finger bitmaps, and thedotted points are connected for forming a red value saturation curve; the area of shapes circulated by the horizontal axis and the vertical axis in each coordinate and the red value saturation curve is respectively calculated; a plurality of shape area peak values are obtained, and in addition, the human body pulse frequency is calculated according to the time difference of the shape area peak values. The human body pulse frequency can be calculated only through electronic equipment, such as computers with cameras, mobile phones and the like, users can conveniently measure the pulse, and the development cost of special pulse test devices is reduced.

The invention discloses an intelligent portable health monitoring wristband which comprises a band body. A GPS (global positioning system) module, a displacement measurement module, a temperature measurement module, a pulse measurement module, a blood oxygen saturation detection module, an emergency button, a recorder, a display module, an alarm module and a microprocessor are arranged on the band body. Output ends of the GPS module, the displacement measurement module, the temperature measurement module, the pulse measurement module, the blood oxygen saturation detection module, the emergency button and the recorder are connected with an input end of the microprocessor, an output end of the microprocessor is connected with the display module and the alarm module, and a wireless communication module and a storage module are connected on the microprocessor. The intelligent portable health monitoring wristband is convenient to use, health of the elderly can be intelligently monitored and managed, health conditions of the elderly can be controlled by family members and medical staff, potential health risks are timely discovered, the elderly is assisted in health self-management, and safety of daily life of the elderly is improved.

A system and method are provided for synchronizing a programmable timer time base and an external time signal. The method either accepts or supplies an external time signal (e.g., IEEE 1588) at an external interface, links a synchronized time base to the external time signal, and clocks a channel time base with the synchronized time base. Then, a timer channel can be used to perform programmable timer functions in response to the channel time base. Some programmable timer functions include input capture, output compare, quadrature decoding, pulse measurement, frequency measurement, and pulse width modulation (PWM) functions. In one aspect, accepting the external time signal at the external interface includes detecting a packet with a time value. In another aspect, the method uses the channel to detect an event at a channel external interface, and compares the channel time base counter value with an expected value to modify the synchronized time base.

A pulse management system for use by an operator that automatically performs measurements on a subset of pulses of an acquired signal stored in an acquisition memory, and generates an accessible data structure that stores characteristics of the chosen subset of acquired signal pulses, including pulse measurement results. The system searches the data structure for pulses of the acquired signal that satisfy operator-provided search criteria. In addition, the operator can sort the selected pulses in any desired manner by specifying a desired sort criteria. The system displays selected pulses along with the associated measurement results, and enables the operator to advance through the selected pulses in any manner desired to display different pulses together or separately along with the associated pulse measurement results. A method for analyzing pulses of an acquired signal is also disclosed. The method includes the step of generating a pulse data array having stored therein pulse characteristics of a previously acquired signal, followed by the step of analyzing the contents of the pulse data array in response to operator specifications.

This invention relates to a super-short optical pulse measurement device based on the SPIDER technology, which applies a pulse dispersimeter with adjustable dispersion composed of two isosceles right-angle prisms of same size to generate chirp pulses, so that, this invention can test photo-pulses from several femtoseconds to several hundreds of femtoseconds, and the pulse dispersimeter is polarized and no light to incident photo-pulses and its dimension is not limited by the spectrum width of photo-pulses.