236 results about "Potential electrical" patented technology

A video endoscope in which the imaging chip at the distal tip is connected to the proximal connector and operator console by an optical fiber. Video data (preferably digital) is impressed on the optical fiber by a pulse-code modulator (PCM) circuit and light emitter with lensing. A small, inexpensive, flexible optical fiber in the endoscope body conveys the PCM optical data to the receiving circuit, preferably via an optical connector at the proximal end of the endoscope, and to decoding and display circuits in the operator console. The fiber optic transmission overcomes the difficulty of electrical transmission of wide band (digital video) signals via miniature cables, which can be expensive, bulky, inflexible, susceptible to noise and interference, and constitute a potential electrical safety risk by leakage currents. The PCM circuits may be integrated into the camera chip.

A personal electrical injury protection system is provided which can be worn by electricians, construction workers, or other individuals working around or with low-voltage lines (i.e. generally less than about 600 volts). The personal electrical injury protection system has both a proximity warning component which provides a warning of potential electrical hazards upon close approach to the low-voltage power line and an electrical contact protection component which turns off the power upon actual electrical contact with the power line. The present personal electrical protection system relies on a radio frequency transmitter attached to the worker or person to be protected and a radio receiver / controller connected to the power line. The radio frequency transmitter has a low frequency generator which is used for electrical-contact protection and a high frequency generator which is used for proximity warning.

The hand-held electronic device includes a central processing unit, a memory unit, a state-detecting unit, a state-determining unit, a main power supply unit, a standby power supply unit, and a power supply switching unit. After determining the presence of a fall state, the state-determining unit will output a fall prevention instruction and which causes the central processing unit to enter a low-potential current mode; meanwhile, the power supply switching unit monitors power output and continues to supply low-potential power. In case of a fall of the hand-held electronic device, the device and method protect operation data and reduce the otherwise power-consuming current. The less power-consuming current is conducive to the reduction of capacitance required for a backup battery. The low-potential current mode is effective in reducing the time taken to recover the operation mode of the electronic device.

The invention discloses an electrical fire disaster online monitoring system based on a cloud platform. The system includes an online electricity usage data comprehensive analysis module, an offline routing inspection safety data digital processing module, a user safety state portrait module and a big data electricity usage safety comprehensive analysis module. The system belongs to the technicalfields such as internet-of-things transmission, internet application, big data cloud platforms and the smart city; on the basis of an internet-of-things cloud technology, electricity usage safety dataof users can be ceaselessly detected, an abnormal state of a user electrical system is automatically caught, and under combination with the safety condition of offline routing inspection equipment, digital conversion and intelligent comprehensive analysis, prediction and prewarning of potential electrical fire disaster hazards, initiative interference on foreboding of electrical fire disasters and green energy efficiency analysis for the users can be achieved; meanwhile, by means of the big data processing capability of the platform, macro energy efficiency and safety data can be provided ina targeted way, an information support is provided for related functional departments in the government to carry out related work, the work efficiency is substantially improved, the fire safety and social stability are effectively ensured, and the economic development is facilitated.

The invention relates to a method and device for flexibly identifying residual current-type electrical fire on line. The method comprises the following steps: arranging a residual current mutual inductor in a power transmission and supply circuit of a low-voltage power distribution system; obtaining an instantaneous value irz of lumped residual current in the circuit as well as waveform which areacquired by the mutual inductor through a power supply branch residual current and other signal detection unit; and according to the characteristics such as abrupt change, discontinuity and nonlinearity of a spot-heat agglomeration residual current instantaneous value ird, separating and extracting ird from irz by adopting a modern information processing technology, and calculating an effective value Ird of ird so as to identify whether potential electrical fire danger exists according to the size of Ird. The on-line identification device consists of three parts such as a residual current signal processing unit, the power supply branch residual current and other signal detection unit and an output execution unit. By adopting the residual current-type flexible on-line electrical fire identification method and device, the features of the potential electrical fire danger caused by electric arc grounding faults can be accurately extracted, normal residual current and abnormal residual current can be correctly identified, and alarm failure and false alarm can be avoided.

A negative differential resistance (NDR) device, along with a method of making the NDR device, and a method of generating NDR using the NDR device. The NDR device includes: a substrate comprising a conductor material or a semi-conductor material; and a self-assembled monolayer (SAM) disposed on the substrate, wherein the SAM includes a first electroactive moiety and a spacer moiety, the spacer moiety defining a barrier between the electroactive moiety and the substrate, wherein the NDR device exhibits negative differential resistance in the presence of a varying applied voltage. Other aspects of the invention include: (1) NDR in multilayers in which the peak to valley ratio of the NDR response can be controlled by the number of layers; (2) modulation of NDR using binding groups to one of the electrical contacts; (3) modulation of NDR using binding groups to the electroactive moiety itself; and (4) NDR devices that display multiple peaks in the current-voltage curve that contain electroactive moieties that have multiple low potential electrochemical oxidations and / or reductions.

Electrical faults are detected in electrical distribution systems (EDS) by detection and location of radio frequency (RF) emissions generated by the fault with multiple time-synchronized radio frequency monitors (RFM) distributed about the EDS. The RFMs are coupled to a self-learning, electrical fault monitor (EFM) that characterizes and / or locates electrical faults based on operating state (OS) patterns learned from transmission of test signals generated within the EDS. RF emissions data samples are characterized as safe operation (SO) states or potential electrical faults by accessing a base of stored knowledge concerning fault emission characteristics and / or synchronized time of arrival at each RFM. Information in the base of stored knowledge is updated to include new EDS operating states (OS). Confidence level associations, location of new radio frequency emission patterns and whether those patterns are indicative of safe operating (SO) conditions or electrical faults are stored in the base of stored knowledge.

Provided is a temperature sensor capable of performing more precise temperature measurement compared to conventional ones, even when manufacturing fluctuations are present in semiconductor elements forming a circuit for generating a temperature-dependent current. The temperature sensor includes: a temperature-dependent voltage generation circuit for generating a temperature-dependent potential that is dependent on temperature; a current generation circuit for allowing a temperature-dependent current to flow based on the temperature-dependent potential; a reference current generation circuit for generating a reference current that is independent of temperature; a capacitor that is charged alternately with the temperature-dependent current during a first charge period and the reference current during a second charge period; a pulse generation circuit for comparing a charged voltage of the capacitor with a reference voltage to generate a pulse; and a control circuit for alternately supplying the temperature-dependent current and the reference current to the capacitor. The temperature-dependent voltage generation circuit includes switches for switching connection relations between MOS transistors forming a current source circuit included in the temperature-dependent voltage generation circuit and bipolar transistors each serving as a load of the current source circuit.

The invention relates to a system and a method for testing local corrosion of a multi-electrode coupled inhomogeneous structure. Three testing systems including a classic electrochemical comprehensive testing system, a micro-area electrochemical testing system and a micro-electrode array testing system are arranged in the system; the three testing systems can be used for testing separately and any two testing systems also can be combined together; by using a micro-electrode array as a bridge and a bond, the three testing systems are coupled and combined, three tests of a classic electrochemistry test, a micro-electrode array test and a micro-area electrochemistry test can be carried out, and overall average information such as self-corrosion potential, self-corrosion current density, polarization property and electrochemical impedance spectroscopy, local distribution information such as galvanic potential and galvanic current having certain statistical characteristics, and micro-area distribution information of local cathode and anode areas in a local corrosion process of an inhomogeneous structure can be acquired and effectively associated on aspects of large scale, middle scale and small scale.

A method for reducing the parasitic capacitance in resistors, and a resistor design embodying this method are described. By creating a p-type or an n-type implant inside of an n-well or a p-substrate, respectively, where the n-well or p-substrate is located in a p-substrate or n-substrate, respectively, a capacitively coupled capacitor is formed in series connection with the parasitic inter-layer dielectric capacitance generated when the resistor is fabricated in the dielectric material. The depletion region formed thereby behaves as a series capacitor which reduces the overall capacitance of the assemblage. The n-well or p-substrate can be placed in electrical connection with a ground potential or brought to a chosen voltage to further increase the depletion region and reduce the capacitance of the resistor.

A method for in-line monitoring of via / contact etching process based on a test structure is described. The test structure is comprised of via / contact holes of different sizes and densities in a layout such that, for a certain process, the microloading or RIE lag induced non-uniform etch rate produce under-etch in some regions and over-etch in others. A scanning electron microscope is used to distinguish these etching differences in voltage contrast images. Image processing and simple calibration convert these voltage contrast images into a “fingerprint” image characterizing the etching process in terms of thickness over-etched or under-etched. Tolerance of shifting or deformation of this image can be set for validating the process uniformity. This image can also be used as a measure to monitor long-term process parameter shifting, as well as wafer-to-wafer or lot-to-lot variations. Advanced process control (APC) can be performed in-line with the guidance of this image so that potential electrical defects are avoided and process yield ramp accelerated.

The invention belongs to the field of electrical safety monitoring, and discloses an electrical safety monitoring and warning method and device. The method includes the following steps: acquiring first monitoring parameters of an electrical circuit; comparing the first monitoring parameters with set thresholds; and giving a warning for potential electrical safety hazards according to the comparison results. The first monitoring parameters include: residual active power and load power, or / and resistive residual current, or / and insulation conductance, or / and intermittent leakage harmonic currentand intermittent leakage harmonic power, wherein the residual active power is used as a monitoring parameter for determining whether a potential electrical safety hazard occurs on an electrical line,the load power is used as a monitoring parameter for determining whether a potential electrical safety hazard occurs on electrical equipment, the resistive residual current is used as a monitoring parameter for residual current type potential electrical safety hazards, the insulation conductance is used as a monitoring parameter for hidden danger of electrical insulation, and the intermittent leakage harmonic current and the intermittent leakage harmonic power are used as fault arc monitoring parameters. Comprehensive and efficient monitoring of electrical safety can be realized.

The invention discloses systems and methods for determining a self-discharge current characteristic of a storage cell. In accordance with one illustrative embodiment, a system for determining a self-discharge current characteristic of a storage cell (or a bank of storage cells) includes a voltage source, first and second voltage measurement circuits, a current measurement circuit, and a processor.The voltage source provides a potentiostat voltage to the storage cell coupled to the system. The first voltage measurement circuit provides a first voltage resolution for measuring an open circuit voltage across a pair of terminals of the storage cell. The second voltage measurement circuit provides a second voltage resolution that is significantly higher than the first voltage resolution for measuring a terminal voltage at one of the pair of terminals of the storage cell. The processor executes a test procedure by using the voltage source, the first and second voltage measurement circuits,and the current measurement circuit, to determine the self-discharge leakage current characteristic of the storage cell.

A charge pump circuit based on a multipath non-overlapped clock belongs to the field of electronic circuit technology. A reference ground potential generating unit is used for generating a reference ground potential. The control signal of a level converting unit is a clock control signal and is used for generating a clock output signal. An input signal of a four-phase non-overlapped clock generating unit is a clock output signal and is used for generating a first non-overlapped clock signal, a second non-overlapped clock signal, a third non-overlapped signal and a fourth non-overlapped signal.A charge pump unit is obtained through parallelly connecting two one-stage charge pumps. Two first-stage charge pumps are respectively controlled by the first non-overlapped clock signal, the secondnon-overlapped clock signal, the third non-overlapped clock signal and the fourth non-overlapped clock signal for alternatively driving charging and increasing power voltage of the charging pump unitand generating output voltage of the charge pump circuit. The charge pump circuit has advantages of eliminating circuit shortcircuit, eliminating threshold loss caused by a body effect, reducing ripple, and improving charging efficiency of the charge pump.

An electronic device includes a battery, a charging integrated circuit (IC) configured to control a charging state of the battery, a connector pin for receiving power from an external device, the connector pin including a first connector pin for receiving a high potential voltage from the external device and a second connector pin for receiving a low potential voltage from the external device, a touch sensor, and a controller. The controller receives power from the external device through the connector pin based on the detection of the external device being connected to the connector pin, charges the battery using a high potential voltage, detects a user input through the touch sensor while the battery is charged, and stops the charging of the battery and outputs a current corresponding to state information of the electronic device through the first connector pin based on the detection of the given user input.

A vibratory gyro which is provided with a ring-shaped vibrating body, leg portions flexibly supporting the ring-shaped vibrating body, a plurality of electrodes formed by having a piezoelectric film sandwiched between an upper-layer metallic film and a lower-layer metallic film in the thickness direction, and a fixed potential electrode. The plurality of electrodes include a bank of driving electrodes for exciting primary vibration, detection electrodes for detecting secondary vibration, and suppression electrodes for suppressing the secondary vibration on the basis of a voltage signal from the detection electrodes. The driving electrodes, the detection electrodes and the suppression electrodes are disposed in the region from an outer peripheral edge of the ring-shaped vibrating body to a vicinity of the outer peripheral edge and / or a region from an inner peripheral edge thereof to a vicinity of the inner peripheral edge.

Variable potential electrokinetic devices and electrokinetic multipliers used for pumping and flow control are disclosed that offer improvements in safety and design flexibility. The devices of the present invention take advantage of combinations of pumping conduits and conducting conduits to permit the use of lower operating voltages in pumps, pressure multipliers, and flow controllers. Devices having N pumping stages and 2N+1 electrodes permit the use of arbitrary voltages at the fluid connection points between the devices and other system components, further improving device safety and flexibility.

In a power transmitting device (101) and a power receiving device (201), active electrodes (13, 23), passive electrodes (14, 24), and reference potential electrodes (15, 25) oppose each other so as to make capacitance coupling, so that capacitances Caa, Cpp, and Cgg are generated. Capacitors having capacitances C1a, C1p, C2a, and C2p are connected to between the reference potential electrode (15) and the active electrode (13), between the reference potential electrode (15) and the passive electrode (14), between the reference potential electrode (25) and the active electrode (23), and between the reference potential electrode (25) and the passive electrode (24), respectively. The power transmission system (1) satisfies any one or more of the conditions of Caa+Cpp<Cgg, C1a+C1p<Cgg, and C2a+C2p<Cgg. With this, the power transmission system stabilizing a reference potential of the power receiving device is provided.

An automatic trip device, a network system using it and control method thereof is related to providing the prediction of a potential electrical accident, in which measuring data including a temperature and a current from each of temperature and current sensors is received, the measuring data is stored in a data memory, the measuring data and a setting data are compared with each another and analyzed, an indicating portion display the life spans of an appliance equipment and mechanism and a power line section accommodating the interrupter, a temperature resistance coefficient based on the temperature stored is calculated, the temperature resistance coefficient is compared with one previously stored for the warning, the power line is interrupted and a warning portion is controlled to generate a warning signal if the calculated temperature resistance coefficient is higher than the warning temperature resistance one, thereby interrupting an accidental high current, rapidly, to protect persons and installments in itself, preventing the spreading of a general failure of power supply and minimizing an amount of damages.

A method for in-line monitoring of via / contact etching process based on a test structure is described. The test structure is comprised of via / contact holes of different sizes and densities in a layout such that, for a certain process, the microloading or RIE lag induced non-uniform etch rate produce under-etch in some regions and over-etch in others. A scanning electron microscope is used to distinguish these etching differences in voltage contrast images. Image processing and simple calibration convert these voltage contrast images into a “fingerprint” image characterizing the etching process in terms of thickness over-etched or under-etched. Tolerance of shifting or deformation of this image can be set for validating the process uniformity. This image can also be used as a measure to monitor long-term process parameter shifting, as well as wafer-to-wafer or lot-to-lot variations. Advanced process control (APC) can be performed in-line with the guidance of this image so that potential electrical defects are avoided and process yield ramp accelerated.

The invention provides a door lock system and a use method thereof. The system comprises a door body, a switch device, a monitoring device and a main control panel, the switch device, the monitoring device and the main control panel are arranged on the door body, the switch device and the monitoring device are electrically connected with the main control panel, the monitoring device is used for acquiring character identity information and transmitting the acquired character identity information to the main control panel, the main control panel is used for comparing the acquired character identity information with pre-stored user information and transmitting control information to the switch device according to a compared result, the switch device comprises a motor lock and a push and pullmechanism, the motor lock is used for acquiring the control information and locking the door body, and the push and pull mechanism is used for acquiring the control information and opening or closingthe locked door body. According to the door lock system, wireless charging is matched with a storage battery, so that power is supplied for power utilization system in the door lock system, and the system solves the problem that a battery is frequently replaced by a user, and potential electrical shock risks are eliminated on the premise of guaranteeing long battery life.

A special-purpose tool for ground potential resetting of a suspension insulator wire-side socket clevis W-type pin is provided. The special-purpose tool comprises a shell; the shell is a rectangular shell with one opening formed at one side; a push block is arranged inside the shell; the push block slides along the shell; a through hole is formed in a surface of the shell which is opposite to the opening; a push rod passes through the interior of the through hole; one end of the push rod is connected with the push block; the other end of the push rod is connected with an upright rod; the push rod is composed of two transverse rods and one vertical rod; the upper end of the vertical rod is connected with the rear end of one of the transverse rods; the lower end of the vertical rod is connected with the front end of the other transverse rod; and the transverse rod connected with the upper end of the vertical rod is wound with a first spring. With the special-purpose tool used in ground potential electrical engineering provided by the invention adopted, the suspension insulator wire-side socket clevis W-type pin can be reset; outage maintenance can be avoided; the frequency of temporary shut-down of equipment can be lowered, and therefore, the availability factor of the equipment can be increased; electrified operation working time can be shortened; work efficiency can be improved; and the safety of electrified operation and the reliability of power supply can be improved.

The invention discloses a wire fixing clamp which comprises an installation portion and a wire fixing portion fixedly connected with the installation portion. The installation portion is arranged on the sharp edge of a metal plate. A wire is arranged on the wire fixing portion. The installation portion wraps the sharp edge of the metal plate so that the method that a damping block or a piece of sponge is usually attached to the sharp edge can be replaced. The problem that when wrapping of the damping block and the sponge is manually controlled, the sharp edge is prone to exposure due to wrapping deviation is solved; meanwhile, the problems that when the damping block or the sponge is disengaged due to poor viscosity and falls into a unit, the performance of the whole machine is influenced, and even the more serious potential electrical safety hazard is caused are solved.

A system and method for non-invasively generating a report of cardiac electrical activities of a subject includes determining, using cardiac electrical activation information, equivalent current densities (ECDs). The ECDs are assembled into time-course ECD information and a spectrum of the time-course ECD information is analyzed to determine peaks for spectral characteristics of atrial fibrillation (AF). The spectral characteristics of AF are correlated with potential electrical sources of the AF and a report is generated indicating the potential electrical sources of the AF spatially registered with the medical imaging data.

The anode sides of respective EL elements E1-E4 constituting icons are connected to a first potential V1, the cathode sides of the EL elements E1-E4 are connected to current absorption sides of constant current sources I1-I4, and current output sides of the constant current sources are connected to a second potential V2 whose potential is lower than that of the first potential via light emission control switches S11-S14. Current regulating resistors R101-R104 are connected in parallel corresponding to the respective EL elements E1-E4, and therefore by appropriately selecting the resistance values of the current regulating resistors R101-R104, light emission intensities of the respective EL elements E1-E4 constituting icons can be regulated appropriately. During an all extinction period during which the respective EL elements E1-E4 are all extinguished, an analog switch S201 is turned off, and an analog switch S202 is turned on. Thus, the anode sides of all EL elements E1-E4 become ground potential, and a reverse bias voltage is applied to all EL elements E1-E4. By periodic applying of this reverse bias voltage, the light emission lifetimes of the EL elements E1-E4 can be prolonged.

A method and system are provided to eliminate the risk of over temperature concerns associated with electrical heating devices, which if undetected may result in an electrical over temperature condition. The electrical heating system may be applied to the detection and control structure of other automotive electrical loads where thermal concerns may exist. The electrical heating system combines several layers of fault detection strategies, to form a unique comprehensive approach to prevent and detect potential electrical fault conditions, which if undetected and / or controlled may result in an electrical over temperature condition.

A capacitor is coupled in parallel with a piezoelectric unit in a sensor. The piezoelectric unit is formed by a film which is sandwiched between a signal electrode and a reference potential electrode. A capacitor is formed by a dielectric film located between the signal electrode and a reference potential electrode. As a result, the capacitance of the sensor element is higher than it would be if the sensor only contained the piezoelectric unit.

A control part (1) generates a control signal, which puts a first switching element (T6) in a conducting state, from the non-active electric potential level of a charging node (netA) at a charging node (netA) and the active electric potential level of a second clock signal in an active period of a second clock signal, and outputs to a control terminal (netB) for conduction and blocking of the first switching element (T6).

The invention discloses a GPRS wireless intelligent electrical safety supervision system, which comprises a control host (1) and a front-end controller (2), and the front-end controller (2) is wirelessly connected with the control host (1) through mobile phone cards, and is respectively electrically connected with a remote circuit breaker (3), an aftercurrent sensor (4) and an overcurrent sensor (5) through wires. The invention provides reliable technical guarantee for the all-weather monitoring of the system, and the system can effectively monitor the faults and abnormal state of an electrical circuit, discover potential electrical fire hazards in time and thoroughly prevent the occurrence of fire accidents, thus providing powerful guarantee for the safety of lives and properties. Moreover, as the system adopts the separate configuration of the control host and the front-end controller and the GPRS wireless connection between the control host and the front-end controller, the waste of manpower and material resources brought about by wiring construction is avoided.