39results about How to "Eliminate spikes" patented technology

Domain name caching is controlled by adding a nonce to a domain name to force propagation of lookup to an authoritative server or service. Desired caching behavior is dictated by controlling when a new and unique nonce-bearing name is created. For example, caching can be completely eliminated by generating a new nonce-bearing name for every request. While a nonce can simply correspond to a random or pseudo random value, it can also be time based. Furthermore, nonces can be phase or time shifted to limit authoritative server load as well as improve response time.

A spiking neural network in which communication and computation is performed on data represented as points in actual time. Such neural networks provide new ways of performing computation in human-engineered computing systems that employ the same basic paradigm as the mammalian neocortex. Information is encoded based on the relative timing of individual voltage spikes produced, consumed, and computed upon by groups of neurons. Component and interconnection delays are an integral part of the computation process. Multi-connection paths between pairs of neurons are modeled as a single compound path. Multi-layer networks are trained from the input layer proceeding one layer at a time to the output layer. Training involves a computation that is local to each synapse, and synaptic weights are determined by an averaging method. The action of inhibitory neurons is modeled as a bulk process, rather than with individual neurons.

This invention relates to an output voltage regulation technology to fuel batteries which applies a linear regulation control circuit and takes the output voltage of the fuel battery as the sample voltage. When the output voltage is higher than the requirement, the regulation circuit begins working and outputs Vw. When it is at the permit sphere, the relay in the regulation circuit connects the positive of the voltage regulation circuit input / output in short-circuit to be output by the fuel battery set directly, which greatly increases the output property of the set.

The invention relates to a bandwidth optimized multimode fiber and a manufacturing method thereof. The multimode fiber comprises three parts, including a fiber core, a quartz glass cladding and a coating with graded index profile. By adopting the method of optimizing the impurity gas flow curve, the refractive index profile parameter of a fiber core is controlled to optimize the optimal bandwidth of the fiber at the communication window of 850nm.The largest change of the differential mode time delay of the fiber is less than 0.22ps / m, the over-filled launch bandwidth is larger than 3,500MHz.km and 500MHz.km respectively at 850nm and 1,300nm and the valid mode bandwidth is larger than 4,700MHz.km and 500MHz.km respectively at 850nm and 1,300nm.The multimode fiber of the invention decreases the chromatic dispersion between modes and the time delay and increases transmission bandwidth, thereby not only meeting the application requirement of a low speed network, but also meeting the application requirement of a gigabit high speed broadband network.

The invention discloses a three-level full-bridge DC conversion device. A low-voltage diode can be directly adopted by a secondary rectifier side of a transformer of the three-level full-bridge DC conversion device to achieve high voltage output, and meanwhile, the problem of non-uniform voltage, caused by the reverse recovery inconsistency, of the diode which is directly connected in series is solved. In most of the switching period, a secondary rectifier diode is clamped by a secondary flying capacitor, so that voltage oscillation and spikes on the diode can be eliminated without adding an auxiliary circuit and reduction of the volume and improvement of the conversion efficiency are facilitated. Output voltage of a secondary rectifier bridge has certain DC bias, the secondary rectifier bridge can output higher voltage than a conventional rectifier circuit, and current ripples on an output filter inductor are smaller, so that improvement of the DC voltage utilization ratio and the power density of the device is facilitated and the volume and the weight of the device are reduced.

A method and an apparatus for monitoring an operating state of at least one tire of a vehicle are provided. The monitored operating state may be, for example, the air pressure of the tire. One tire state variable that represents the current operating state of the tire, and one calibration variable that represents the target tire state of the tire, are taken into consideration in the monitoring. The monitoring is accomplished in different monitoring modes, i.e., the particular monitoring mode employed is determined as a function of at least one driving state variable representing the driving state. In an example embodiment, for a given driving state variable, the vehicle speed is selected as the differentiation criterion for the different monitoring modes.

A harmonic frequency conversion module is disclosed including a polarization maintaining (PM) fiber optical link for providing an output stabilized from power fluctuation by the inclusion of one or more polarizers in the PM fiber optical link. Removing polarization distortions removes noise which has a significant negative effect on the output of harmonic frequency conversion elements. It has been found that the noise in frequency converted light has additional components, caused by mode interaction during conversion. In accordance with the present invention, we are able to remove the spikes in this noise, making it more stable and less dependent on external conditions. If the PM optical fiber route consists of multiple elements creating polarization distortions, a polarizer should be inserted between the most distorting element and the output of the fiber system. If many elements contribute to polarization distortions, several polarizers can be inserted into the system.

The invention discloses an automatic switching system of a power supply. The system is used for automatically switching an external power supply to an emergency power supply to realize uninterrupted power supply. The automatic switching system is characterized by comprising a power supply switching circuit; the power supply switching circuit comprises an emergency power supply bt1, a fuse f200, a fuse f201, a fuse f203, a mem2313 chip, a resistor r1, a resistor r2, a resistor r3, a resistor r4, a resistor r5, a resistor r6, a resistor r7, a resistor r8, a diode d1, a diode d2, a diode d3, a diode d4, a diode d6, a diode d5, a diode d200, a diode d201, a diode d210, a diode d211, an audion q1, a capacitor c10, a capacitor c200, a capacitor c211, a capacitor c201, a capacitor c222, an inductor l200, a switch s1 and an AT89S51 single-chip microcomputer. The power supply switching system is designed, and the external power supply can be automatically switched onto the emergency power supply under the condition that the external power supply is abnormal, so that uninterrupted power supply of the system is guaranteed.

The invention discloses an analog signal sampling method. The method comprises steps as follows: responding sampling requests for high-frequency analog signals and low-frequency analog signals, and starting a high-frequency timer and a low-frequency timer for timed work, wherein the high-frequency timer starts timing from a first timing initial value, resets at the low-frequency timing cycle and starts timing from zero again; the low-frequency timer starts timing from a second timing initial value, resets at the low-frequency timing cycle and starts timing from zero again; the low-frequency timing cycle is an integral multiple of the high-frequency timing cycle, and the difference between the first timing initial value and the second timing initial value is larger than zero and is not in a multiple relation with the high-frequency timing cycle; a sampling module is triggered to sample analog signals when the timing value is detected to be zero. Correspondingly, the invention further discloses an analog signal sampling device. With the adoption of the embodiment, the sampling accuracy of the analog signals is improved, and the condition that high-frequency sampling is affected by low-frequency sampling is avoided.

The present invention provides an analog-to-digital conversion method based on Gray coding and absolute value algorithm. Gray coding is used to eliminate possible peak pulses in coding. By introducing absolute value algorithm, the sudden change phenomenon of each pipeline output is effectively eliminated, so that The output of each pipeline is represented by a continuous analog conversion process using a unified analytical algorithm without using sub-A / D and sub-D / A to effectively reduce the noise introduced in the encoding process. Since the conversion adopts the gray coding method, it can effectively improve the reliability of the coding, and the conversion process does not need sub-A / D and sub-D / A, which can reduce calculation errors and improve conversion accuracy. The encoding unit and the computing unit are independent, which avoids the feedback link of the sub-D / A and helps to improve the conversion speed.

The invention provides an adaptive filter which effectively eliminates noise and peaks with 2kHz-1MHz frequency in an industrial power distribution system. According to the adaptive filter, harmonic power frequency voltage is independently used as reference voltage, and a harmonic component is traced along the reference voltage. Noise consists of a series of random peaks and has no alternating current and direct current difference, so that the noise can be filtered in the traditional RC (Resistance-Capacitance) or RCL (Resistance-Capacitance-Inductance) circuit and an active filtering network. Voltage reduction can ensure that a used large-value capacitor can effectively extend a filtering frequency range to 2kH2. The method is high in cost and large in space occupation.

The invention provides a binary analog-to-digital (AD) conversion method based on a cosine algorithm and a Gray code, which is characterized by comprising the following steps: sampling an analog input signal Ui; based on the cosine algorithm, calculating the n-bit data value Yn of the analog input signal Ui, wherein n is a natural number; comparing the data value Yn with zero to obtain an n-bit Gray code value Gn; and using the sequence of the Gray code Gn as an AD conversion output signal of the analog input signal. By using the Gray code mode, spike pulse possibly existing in the code can be eliminated; and due to the introduction of the cosine function algorithm, a full parallel coding method is realized. By using the concatenated pipeline type coding method based on the cosine algorithm, the jumping of the pipeline output of each stage can be effectively eliminated.

The embodiment of the invention discloses a liquid crystal display equipment driving method and equipment, relates to the technical field of liquid crystal, and solves the problems that various poor phenomena on a picture are caused by overshoot of introduction in a process of shortening responding time of a liquid crystal through OD (Over Driving). The method comprises the following steps of: utilizing over-driving voltage to drive liquid crystal molecules to overturn, wherein the over-driving voltage is higher than a regular driving voltage value; before overturning the liquid crystal molecules to an appointed position, at least reducing the value of the over-driving voltage once until the liquid crystal molecules are overturned to the appointed position, wherein the over-driving voltage which is reduced for each time is higher or equal to the regular driving voltage value and is lower than an over-driving voltage value before value reduction. The liquid crystal display equipment driving method is mainly used for driving the liquid crystal display equipment.

The invention relates to an ambient light compensation circuit for an infrared receiving device. The circuit comprises a potential detection unit, a voltage integration unit and a voltage-current conversion unit which are connected in sequence, wherein the potential detection unit is used for receiving a first voltage signal (VSAM) and comparing the first voltage signal (VSAM) with a reference voltage; the voltage integration unit comprises a first switch (SW1) for controlling the charging of a capacitor and a second switch (SW2) for controlling the discharging of the capacitor, and the first switch (SW1) and the second switch (SW2) are controlled according to an output signal of the potential detection unit, so that the capacitor is charged or discharged to output a second voltage signal (VX); and the voltage-current conversion unit is used for converting the second voltage signal (VX) to output a compensation current. According to the invention, the ambient light current compensation can be realized, and the stable gain is realized.

The invention discloses a voltage source inverter common-mode voltage inhibition method, and belongs to the power electronic technical field; the method comprises the following steps: selecting a backup voltage vector for each control cycle according to a voltage vector of the previous cycle and a sector to which the current vector of the present cycle is located, and optimizing a target functionaccording to the backup voltage vector, thus obtaining the optimal voltage vector of the present cycle; applying the optimal voltage vector on an inverter. The method can fully consider the influenceson the common-mode voltage by a dead zone when the backup voltage vector is selected, thus fully overcoming the dead zone influences. Therefore, the method is applied to a photovoltaic grid connectedinverter or a motor-driven controller, thus reducing the common-mode voltage influences.

The invention provides an amplifying circuit for high-frequency signal common mode rejection based on a current feedback operational amplifier. The amplifying circuit is composed of n levels of cascaded instrument amplifying circuits, wherein n is not smaller than 1, each level of instrument amplifying circuit is composed of two current feedback operational amplifiers, the same-phase input end of the current feedback operational amplifier B is connected with a peak signal source, the same-phase input end of the current feedback operational amplifier A is connected with a snow slide signal source (the snow slide signal source is superposed on a peak pulse signal), and the output end of the current feedback operational amplifier An and the output end of the current feedback operational amplifier Bn are respectively connected with the two input ends of the same radio frequency transformer T. The amplifying circuit solves the technical defect that the radio frequency amplifier cannot realize a high difference mode gain and has the advantages of high rejection ratio; and the high bandwidth property satisfies the demand of high frequency signal processing, meanwhile the problem of limited current feedback gain is solved by using the cascaded gain manner, and the objective of high-precision screening of snow slide signals is also achieved.

The invention discloses an informatization remote monitoring system based on big data. The informatization remote monitoring system comprises a smoothing input circuit, a rectified feedback circuit and a voltage stabilizing output circuit. According to the smoothing input circuit, an inductor L1, a capacitor C1 and a capacitor C2 are used for forming pi-type circuit smoothing, then signals are input into the rectified feedback circuit, according to the rectified feedback circuit, an amplifying circuit composed of a triode Q1 and a triode Q2 is used for conducting differential amplification onthe signals, meanwhile, a rectifying circuit composed of an operational amplifier AR1, an operational amplifier AR2, a variable resistor R15 and a capacitor C3 is used for rectifying the signals, meanwhile, a triode Q3 and a triode Q5 are used for feeding back and correcting the potential of output signals of the rectifying circuit, a triode Q4 is used for conducting positive feedback on an emitting electrode signal of the triode Q2, and finally the voltage stabilizing output circuit applies a voltage stabilizing circuit composed of a triode Q6, a triode Q7 and a voltage stabilizing tube D4 toconduct outputting after voltage stabilization, so that signals in a signal transmission channel are used for automatically and effectively correcting data signals received by the informatization remote monitoring system based on the big data, and signal turbulence is prevented.

The invention discloses a filtering method used for a three-phase unbalanced load compensation device. The method comprises the following steps of a charging direct voltage signal integration acquisition step: integration is performed on a direct voltage signal generated when the three-phase unbalanced load compensation device is charged from zero, wherein the direct voltage signal is a Ch1 signal, at an assigned moment, the Ch1 signal is started to be sampled, simultaneously a direct voltage signal generated when the three-phase unbalanced load compensation device discharges maintains a zero voltage till that the sampling of the Ch1 signal is completed and the signal returns to zero, wherein the direct voltage signal is a Ch2 signal; a discharge direct voltage signal integration acquisition step: integration is performed on the direct voltage signal generated when the three-phase unbalanced load compensation device discharges from zero, wherein the direct voltage signal is the Ch2 signal, at an assigned moment, the Ch2 signal is started to be sampled, simultaneously the direct voltage signal generated when the three-phase unbalanced load compensation device is charged maintains a zero voltage till that the sampling of the Ch2 signal is completed and the signal returns to zero, wherein the direct voltage signal is the Ch1 signal; and a returning step: the charging direct voltage signal integration acquisition step is returned to.

The invention discloses a common-mode voltage suppression method of a voltage source inverter, which belongs to the technical field of power electronics. In each control cycle of the present invention, an alternative voltage vector is selected according to the voltage vector used in the previous cycle and the sector where the current vector is located in this cycle, and then the objective function is optimized according to the alternative voltage vector, so as to obtain the optimal voltage for this cycle vector and apply it to the inverter. Since the present invention fully considers the influence of the dead zone on the common mode voltage when selecting the alternative voltage vector, the influence of the dead zone can be completely overcome. Therefore, the present invention can be applied to photovoltaic grid-connected inverters or motor drive controllers to reduce the influence of common-mode voltages.

The present invention discloses a method for improving appearance of a contact hole of a semiconductor device, comprising: a first step of successively forming one layer of USG layer and one layer of BPSG layer to form an interlayer film; a second step of defining a contact hole window through photolithographic process; a third step of performing wet etching to form a top area of a contact hole; a fourth step of performing dry etching to form a bottom area of the contact hole; and a fifth step of performing annealing backflow of the BPSG layer. The method of the present invention can make the appearance of the contact hole smooth, can eliminate a peak structure, and can improve reliability of the device.

The invention relates to a method for measuring the public measure value of region, wherein said method comprises: obtaining the effective data sending amount and relative power in the measure period, via the data amount relative to the data confirm signal and relative transmission power in the measure period, then writing said value into formula to obtain the region public measure vale; based on the data that lost caused by in maximum retransmission times, using the data amount that sent at the start as effective data amount, and using the sum of N times of transmission powers as relative power; based on the condition that not receiving data confirm in the measure period, using the last effective value as measure value. The invention can obtain better region public measure value, to execute the load control better. And the invention also discloses a relative device.

The invention discloses a method and device for leveling a scattering path line of a distributed fiber-optic sensing system. The device comprises a synchronizing signal generating module, a photodetector and a clock signal generating module, wherein a signal output interface of the synchronizing signal generating module is connected with a control interface of a light source driving module and a control interface of a modulus converter, and a control interface of the synchronizing signal generating module is connected to a control interface of a discrete type digital delayer; the light source driving module is connected to a light source; an output interface of the photodetector is connected with a signal input interface of the modulus converter and a minuend input interface of a subtracter, and an output interface of the modulus converter is sequentially connected with the discrete type digital delayer, a digital-analog converter and the minuend input interface of the subtracter; the clock signal generating module provides a clock for the modulus converter, the discrete type digital delayer and the digital-analog converter; the output of the light source, the input of the photodetector and the output of the subtracter are respectively used as a light output interface, a light input interface and a signal output interface of the whole device.

The invention provided an iron tower stress and vibration detection device, which comprises a shell body, wherein holes are formed in the two sides of the shell body, and a steel wire penetrates through the shell from the holes in the two sides and then is fixed to an iron tower; an upper polar plate and a lower polar plate are arranged in the shell body, the upper polar plate and the lower polarplate are respectively fixed in the shell body through a first spring and a second spring, a middle polar plate is arranged between the upper polar plate and the lower polar plate, the middle polar plate is fixed on the steel wire, and the three polar plates are connected with a detection circuit; an exciting coil is arranged in the shell body, is close to the steel wire, is fixed under the steelwire and is connected with the driving circuit; and the detection circuit and the driving circuit are connected with a processor module. The iron tower stress and vibration detection device integratesiron tower stress detection and vibration detection, and has the advantages of being convenient to install, high in detection precision and low in cost.

The invention relates to an ambient light compensation circuit for an infrared receiving device, comprising a potential detection unit, a voltage integration unit and a voltage-current conversion unit connected in sequence, wherein the potential detection unit is used to receive a first voltage signal (VSAM) , and compare the first voltage signal (VSAM) with the reference voltage; the voltage integration unit includes a first switch (SW1) for controlling the charging of the capacitor and a second switch (SW2) for controlling the discharging of the capacitor, according to the output of the potential detection unit The signal controls the first switch (SW1) and the second switch (SW2), so as to charge or discharge the capacitor to output a second voltage signal (VX), and the voltage-current conversion unit is used to convert the second voltage signal ( VX) is converted to output compensation current. The invention can realize ambient light current compensation and realize stable gain.

The invention discloses a method for controlling chip temperature during quick thermal treatment. The method comprises the following steps of: naturally heating a chip within a first time interval; and at the end of the first time interval, quickly heating the chip at a second time interval. The method is characterized in that: the change rate of the temperature rising speed of the chip at the second time interval is between -1.5 DEG C / s<2> and -1.2 DEG C / s<2>; and preferably, the change rate of the temperature raising speed of the chip at the second time interval is -1.2 DEG C / s<2>. According to the temperature rising control method, a peak phenomenon can be eliminated effectively and the chip yield is increased.

The invention discloses a communication base station safety monitoring device, which comprises a power supply module, an electric energy acquisition module, a controller and a wireless module. The power supply module is used for providing a stable +5V power supply; the electric energy acquisition module adopts a voltage sensor to detect a voltage signal on a power supply line of a power supply ofthe communication base station in real time; a signal amplification conditioning circuit effectively filters interference of magnetic devices in the communication base station and external electromagnetic clutter signals by applying a band-pass filter principle, and effectively eliminates bias voltage, so that the accuracy of a detection signal amplification value is ensured; an anti-interferencestabilizing circuit effectively eliminates interference when harmonic waves or voltage surges exist in the power supply line of the communication base station power supply, so that the anti-interference performance of the monitoring device is improved; and the controller sends the electric energy detection data to a background monitoring server through the wireless module for monitoring and management, so that accurate remote monitoring of the power supply performance of the communication base station is achieved. Good reliability and maintainability are achieved.

The invention discloses a method for sampling analog signals, comprising: responding to sampling requests for high-frequency analog signals and low-frequency analog signals, simultaneously starting a high-frequency timer and a low-frequency timer to perform timing work; wherein, the high-frequency timer The timing of the timer is cleared from the first timing initial value to the high-frequency timing period and reset from zero; the timing of the low-frequency timer is cleared from the second timing initial value to the low-frequency timing period and restarted from zero Timing; the low-frequency timing period is an integer multiple of the high-frequency timing period, the difference between the first timing initial value and the second timing initial value is greater than zero and is not in multiples of the high-frequency timing period ; When the timing value is detected to be zero, the sampling module is triggered to sample the analog signal. Correspondingly, the invention also discloses an analog signal sampling device. By adopting the embodiments of the present invention, the accuracy of analog signal sampling is improved, and low-frequency sampling is prevented from affecting high-frequency sampling.

The invention discloses a push-pull switching power clamping circuit. The circuit comprises a power compensation module, a clamping control module and a power output module; the power compensation module is connected with the clamping control module and a power supply, and is used for providing a compensated clamping control voltage for the clamping control module when the voltage of the power supply fluctuates; the clamping control module is connected with the power output module, and the clamping control module feeds back the control electrode of the power output module through the clampingcontrol voltage so as to control the clamping voltage. By means of the circuit, the peak pulses at the output end of the push-pull type power output module can be eliminated, and the ringing signals can be eliminated, so it is ensured that the push-pull type switching power supply outputs 0 without parasitizing any spurious signals when output of the power output module is cut off, and the outputwaveform is a standard rectangular wave voltage.