95results about "Power measurement by galvanomagnetic effect devices" patented technology

Methods and apparatuses for improved data transmission control protocols. Acknowledgment streams are used by a sender process to generate various estimates of eligible transmission rates that are fair to other processes competing for bandwidth across a common network. In addition, the acknowledgment streams are used in conjunction with various other standard transmission control protocol metrics to adapt a filter for use on the rate estimates. Additional improvements in throughput may no be had by measuring the overall capacity of the computer network using packet pair dispersion measurements and adaptive network probing. In addition, the methods may be adapted for both packet transmission and video streaming applications.

A modular electricity meter configuration and corresponding methodology permits use of certain common components in combination with either a variety of mechanical displays or electronic displays. In electricity meter arrangements making use of printed circuit board or solid state technology, at least two separate electronics boards may be provided. One may constitute a standard board for basic metrology functions while the other may comprise selected implementation of various higher level functions for creating a custom design electricity meter to meet customer requirements. Different customers may be provided with differently outfitted meters by corresponding customization of the higher level function board. A unitary power supply may be provided for both boards through a fixed connector. A common baseplate includes a circuitry link through a nonremovable plug or clip for alternatively providing a tamper proof embodiment or one with exposed terminals for permitting customer testing. Physical stability and strength is provided by using tapered mounting posts and integrated snap fit arrangements without requiring any screws for assembly. A light pipe provides external output through an innercover to indicate correct meter operation. Meter data and other metered information may be output through different configurations optionally involving hardwired output, RF links, pulse outputs, and telephone connections via modem or wireless.

Some embodiments can concern a method of using a power consumption measurement device. The power consumption measurement device can be mechanically coupled to a surface of a circuit breaker box overlying at least part of one or more main electrical supply conductors for an electrical power infrastructure of a structure. The method can include: determining one or more first magnetic field readings from the one or more main electrical supply conductors using one or more sensors in the power consumption measurement device; after determining the one or more first magnetic field readings, electrically coupling a first calibration load to the electrical power infrastructure; while the first calibration load remains electrically coupled to the electrical power infrastructure, determining one or more second magnetic field readings from the one or more main electrical supply conductors using the one or more sensors in the power consumption measurement device; calibrating the power consumption measurement device using at least in part the one or more first magnetic field readings and the one or more second magnetic field readings, after calibrating the power consumption measurement device, determining one or more third magnetic field readings from the one or more main electrical supply conductors using the one or more sensors in the power consumption measurement device; and determining an electrical power used by the electrical power infrastructure of the structure using at least the one or more third magnetic field readings and the one or more calibration coefficients. Calibrating the power consumption measurement device can include determining one or more first calibration coefficients for the power consumption measurement device using at least in part the one or more first magnetic field readings and the one or more second magnetic field readings. Other embodiments are disclosed.

A device for use in a power transmission system to sense GICs. The device may be a part of a reactance-injecting device on a power line, it may be a standalone device, or it may be a part of another type of device. The device may include a sensor to sense magnetic fields (e.g., a Hall effect sensor). The sensor may be positioned in the air gap of a magnetic core formed concentrically around the power line. The signal from the sensor may be converted to a digital signal and separately processed to determine the magnitude of the AC current and the magnitude of the DC (or quasi-DC) current. If the output signal of another A/C current sensor is available, that output signal may be used to adjust/calibrate the determined magnitude of the DC current. The sensor may communicate with other devices in a network to provide GIC information.

There is described a system to measure the electrical consumption of a household. This system consists of a network of measuring devices that are attached to wires between electrical appliances and circuit breakers and of a communication and processing unit that receives measurement data from the measuring devices. Low precision sensors based on the Hall effect may be used for obtaining precise measurements of energy consumption by providing a casing for the measuring devices that ensures a fixed, known, and precise alignment with respect to the wire to which it is attached. Low precision sensors based on the Hall effect may also be used by performing a correction calibration of measured data.

Some embodiments can teach a system for monitoring usage of electrical power by a structure. The structure can have one or more main electrical power lines that supply the electrical power to a first load in the structure. A portion of the one or more main electrical power lines can run substantially parallel to a first axis. The structure can further have a panel that overlies the portion of the one or more main electrical power lines. The system can include: (a) a current sensor unit configured to be coupled to a portion of a surface of the panel, the current sensor unit having: (a) at least one magnetic field sensor having a length substantially parallel to a second axis, wherein the second axis is substantially perpendicular to the first axis, and the at least one magnetic field sensor is configured to detect a magnetic field generated by the one or more main electrical power lines; and (b) a processing unit configured to run on a processor. The current sensor unit can be configured to produce an output signal based on the magnetic field detected by the at least one magnetic field sensor. The processing unit further can be configured to receive the output signal from the current sensor unit and process the output signal to determine one or more parameters related to the usage of the electrical power by the first load in the structure. Other embodiments are disclosed.

Methods and apparatus for non-intrusive monitoring by sensing physical parameters such as electric and/or magnetic fields. Such apparatus and techniques may find application in a variety of fields, such as monitoring consumption of electricity, water, etc., in homes or businesses, for example, or industrial process monitoring.

A magnetic bridge power sensor including a magnetic bridge that includes: a magnetic circuit 1 having two ends; magnetic circuits 21a and 21b each having two ends, one of the two ends of each of the magnetic circuits 21a and 21b being connected to one of the two ends of the magnetic circuit 1; magnetic circuits 22b and 22a each having two ends, one of the two ends of each of the magnetic circuits 22b and 22a being connected to the other end of the magnetic circuit 1, the other ends of the magnetic circuits 22b and 22a being connected to the magnetic circuits 21a and 21b, respectively; a magnetic circuit 2 having two ends, the two ends being connected to a connection point between the magnetic circuit 21a and the magnetic circuit 22b and to a connection point between the magnetic circuit 21b and the magnetic circuit 22a, respectively; an excitation coil 3 provided to be able to generate a magnetic flux in the magnetic circuit 2; and a magnetic flux detection coil 4 provided to be able to detect the magnetic flux in the magnetic circuit 1. A current, which is obtained by subjecting a current proportional to a voltage on a measurement target power line 5 to at least one of an intermittent processing and an inverting processing, is carried to the excitation coil 3. The current of the measurement target power line 5 is carried to a detection target current conductor 5a. An output of the detection coil 4 is synchronously detected by a signal having a phase synchronized with a cycle of the intermittent processing or the inverting processing at a frequency twice as high as a frequency of the intermittent processing or the inverting processing.

The invention relates to a superconducting magnet quenching detection system based on active power, comprising a first superconducting coil, a second superconducting coil, a voltage sensor circuit, a differential operational amplifier, an absolute value circuit, an analog multiplication circuit, a low-pass filter circuit, a comparison circuit, an output signal, and the like. A voltage on the superconducting coils passes by the voltage sensor circuit, is used as the input of a differential operational amplifying circuit, is calculated for a difference value and amplified by the circuit, an absolute value of the output signal K(u1-u2) is calculated by the absolute value circuit, and the active power is detected through the analog multiplication circuit, wherein P=K(u1-u2)*i. The signal P passes by the low-pass filter circuit and the comparison circuit, and the output signal is converted into a high level or a low level according to the detected P value. When superconducting coil is not quenched, the P value is smaller than a patriarch voltage, and the output signal is at a high level. When the superconducting coil is quenched, the P value is larger than the patriarch voltage, and the output signal is at a lower level so as to judge whether superconducting is quenched or not according to the output signal.

The invention relates to a method of determining power consumption of an electrical heating system, where the power consumption is defined by a reading of information from a conductor (4, 6) within a thermostat (1). The invention further relates to a thermostat comprising an element for determining the power consumption of an electrical heating system, where the thermostat (1) is provided with a reading element (5) for reading current from a conductor (4, 6) and a reading element (28) reading voltage from a transformer output.

In some implementations, a gasket, set forth by way of example and not limitation, includes a housing having a plurality of openings operative to receive a plurality of prongs of a power connector for an appliance. At least one sensor is operative to sense at least one characteristic of an environment. A transmitter is operative to transmit one or more signals derived from the at least one sensed characteristic, where the transmitted signals are capable of being received by a receiving device. A power circuit is operative to provide power from the electric current to the at least one sensor and the transmitter.

A Hall sensor has at least three Hall sensor elements (1, 2,..., 94) which each have at least three element connections (A, B, C, D, E, F, G, H) and are connected in a circuit grid having a structure which is more than one-dimensional, and at least three sensor connections (EXT_A, EXT_B, EXT_C, EXT_D) for making contact with the Hall sensor. In this case, each sensor connection (EXT_A, EXT_B, EXT_C, EXT_D) is connected to at least one of the Hall sensor elements (1, 2,..., 94) at one of the element connections (A, B, C, D, E, F, G, H) thereof.

The present invention provides power measuring apparatuses of various thin film sensor types, which can easily measure, with a small configuration, power in high frequency circuits and batteries. This power measuring apparatus is provided with: a magnetic film, which is disposed in parallel to a primary conductor having a load current flowing therein; a power feed unit, which is provided with an input/output terminal that supplies an element current to the magnetic film; a bias magnetic field applying unit, which applies a direct current magnetic field that is parallel or perpendicular or diagonal to the magnetization direction of the magnetic film; and a detecting unit, which detects a voltage between the edge portions of the magnetic film in the element current direction. The power measuring apparatus detects merely a direct current voltage composition between the edge portions of the magnetic film in the element current direction.

The invention discloses a method for detecting the purifying capacity of an electrostatic oil smoke purifier, comprising the following steps: pre-setting a mathematic model of corresponding relationship between purifier running power and purifier cleanness, wherein the purifier cleanness is used for representing the purifying capacity of the purifier; obtaining the current running power of the purifier; and according to the mathematic model of the corresponding relationship between the purifier running power and the purifier cleanness, generating the current cleanness of the purifier corresponding to the current running power of the purifier. The invention further discloses a system for detecting the purifying capacity of the electrostatic oil smoke purifier, comprising a power detection device and a data processor. The system in the invention can conveniently generate the current cleanness of the purifier by detecting the power change situation of the electrostatic oil smoke purifier and comparing the relationship between the purifier running power and the purifier cleanness, thus obtaining the purifying capacity state for detecting the purifier; and the system has the advantages of high accuracy, quick response, low cost, convenience in maintenance and the like.

In a semiconductor device having a magnetic sensor configured to detect a direction of magnetism, stress applied by a magnetic flux concentrator that is a magnetic material is small. The magnetic sensor includes, in combination, Hall elements arranged on a surface of a semiconductor substrate, and a magnetic flux concentrator formed of a magnetic material having the function of amplifying magnetism, the magnetic flux concentrator being arranged on the semiconductor substrate, for at least partly covering each of the Hall elements. A slit or a slot is formed in the magnetic material to inhibit generation of stress applied to the Hall elements.

The following disclosure provides a power strip and an electric power measurement system, wherein the power strip includes: a busbar electrically connected to a power source; multiple electrical outlets allowing multiple power plugs to be inserted thereinto, respectively; distribution bars which are branched out from the busbar and respectively supply the electrical outlets with electric currents of the power source; and a plurality of electric current measurement units each configured to measure the electric current flowing through a corresponding one of the distribution bars. The current measurement precision is increased.

The invention discloses a power meter design method and system based on a giant magnetoresistive sensor. A GMR sensor is used as a power sensor; electric power of a circuit is converted into a power supply voltage of the GMR sensor and a product of a measurement magnetic field through a proper circuit structure; and the electric power can be calculated according to an output voltage of the sensor.A control device collects the output voltage of the sensor, the output voltage is converted and then displayed on a display device, so that the circuit power can be seen visually. The GMR sensor is adopted as a power sensor, represents a novel, high-performance electrical detection component, can measure both DC electrical signals and high frequency (MHz level) AC signals, and adopts a Wheatstonebridge structure inside. The power meter overcomes defects that the traditional sensor has a narrow bandwidth and large volume and is vulnerable to temperature, has a wide band range, is easy to test, and can be widely used.

The invention provides a pumping unit power hand-held test instrument, relating to an intelligent power measurement instrument. One end of a test instrument body is provided with a clamp opening; the joint between the test instrument body and the clamp opening is provided with a trigger; the test instrument body is provided with a display screen, press keys, a USB (Universal Serial Bus) interface and a power input socket; an SD (Secure Digital) data storage card and a circuit system are arranged in the test instrument; and the circuit system is formed in a way that a current induction module is connected with an AD (Analog-to-Digital) acquisition module through a current signal adjustment module, a voltage isolation module is connected with the AD acquisition module through a voltage signal adjustment module, the AD acquisition module is connected with a central processing unit, and a liquid crystal display module, a press key input module and a bulk storage module are all connected with the central processing unit. The instrument provided by the invention can accurately test, display and record electric parameters of the pumping unit, such as voltage, current, system frequency, active power, reactive power, apparent power, power factor, unit time power consumption and the like, and can determine the working condition balance degree of the pumping unit based on a power curve method so as to reflect actual working conditions, thereby visually displaying whether the pumping unit is subjected to negative work, providing a reliable basis for balance degree adjustment of the pumping unit, reducing accidents of the pumping unit, and prolonging the service life. Thus, the invention can ensure the pumping unit to work in balanced conditions and prolong the service life of the pumping unit by more than five years.

The invention discloses a vehicle automatic electric energy saving system and a vehicle automatic electric energy saving method. The system comprises an actual service power detection device, a driving speed signal detection device and an electric energy saving judgment control device, wherein the actual service power detection device is used for detecting the actual service power of a vehicle in the current state; the driving speed signal detection device is used for detecting the current driving speed of the vehicle; and the electric energy saving judgment control device is used for judging whether the current driving speed is the driving speed which saves the electric energy most according to the actual service power and the current driving speed, and if the current driving speed is not the driving speed which saves the electric energy most, judging whether acceleration or deceleration is needed for realizing better utilization of the electric energy and transmitting a control signal to an acceleration and deceleration control device to increase or reduce the driving speed of the vehicle. The embodiment of the invention judges whether the current driving speed is the driving speed which saves the electric energy most according to the relationship between the current driving speed and the actual service power, so that the vehicle is accelerated or decelerated and the driving speed is gradually adjusted to the speed for saving the electric energy most so as to save the electric energy.

Systems and methods detect abnormal conditions in electrical circuits by providing thermal imaging combined with non-contact measurements of current and voltage. Such systems may be implemented in a single test device, or in wired combinations, or in wireless communication implementations with multiple test devices and/or accessories, or in combination with one or more additional devices, such as a mobile phone, tablet, personal computer (PC), cloud-based server, etc. A thermal imaging tool that includes an infrared sensor may first discover and image one or more thermal anomalies in an object, such as an electrical circuit. One or more non-contact current or voltage sensors may be used to measure current and/or voltage, which allows for determination of the power loss at the measured location. The power loss may be used to determine an estimation of the abnormal resistive power losses in a circuit, as well as the costs associated therewith.

The invention discloses a power detection device, which belongs to the field of power detection. The device comprises a voltage detection unit, a current detection unit, and a processing unit, wherein the voltage detection unit is used for detecting a voltage value of a to-be-detected element on a circuit board and outputting a first voltage value; the current detection unit is used for detecting a current value of the to-be-detected element and outputting a second voltage value; the processing unit is used for calculating power of the to-be-detected element according to the first voltage value and the second voltage value; the current detection unit comprises a first hall sensor, a second hall sensor and an amplifying circuit, the first hall sensor and the second hall sensor are arranged close to an input line of the to-be-detected element, the positive electrode of the first hall sensor is connected with a power supply, the negative electrode of the first hall sensor is connected with the input end of the amplifying circuit, the negative electrode of the second hall sensor is connected with the power supply, the positive electrode of the second hall sensor is connected with the input end of the amplifying circuit, and the output end of the amplifying circuit is connected with the processing unit. The power detection device can realize power measurement on a micro-power consumption element.

The invention discloses a wireless sensing device and a measuring method for instantaneous input power of a lifting motor and is suitable for a three-phase alternating current (AC) asynchronous motor used for a crane. The wireless sensing device for the instantaneous input power of the lifting motor comprises a Hall current sensor connected with the phase-A electric energy input end of the three-phase AC asynchronous motor used for the crane; a pin M of the Hall current sensor is respectively connected with a sampling resistor and a wireless signal processing device; the sampling resistor is grounded; the output end of the wireless signal processing device is connected with the pin M of a Hall voltage sensor; and the input end of the Hall voltage sensor is bridged onto the phase A and the phase B of the three-phase AC asynchronous motor used for the crane. The wireless sensing device for the instantaneous input power of the lifting motor is simple in structure and low in cost and is safe and reliable. Data is transmitted by adopting a wireless transmission mode, and therefore, various defects of signal wire transmission can be effectively avoided. The wireless sensing device and the measuring method for the instantaneous input power of the lifting motor are especially suitable for online measurement of the instantaneous input power of an active lifting motor in a production environment which is comparatively severe.