56results about How to "Will not cause misjudgment" patented technology

The invention relates to a gas insulation combination electric appliance internal local discharge detector, belonging to the high voltage insulation detection technical field, for resolving the problem that the prior art can not effectively filter environment signals and interference signals in detection. The gas insulation combination electric appliance internal local discharge detector comprises a shield ring outside a GIS insulation sub ring, which is provided with a detection window; an antenna group and a detection unit, while the antenna unit at least comprises a first antenna unit and a second antenna unit and the detection unit comprises a signal operation circuit for eliminating the environment interference signals in the received GIS leakage signal to obtain a GIS local discharge signal. The gas insulation combination electric appliance internal local discharge detector can correctly detect various local discharges in GIS in early period, without error and leaked judgment. For the integrated online detection system, the gas insulation combination electric appliance internal local discharge detector has reduced cost and can realize simple and effectively following treatments.

The invention provides a synchronous rectification control circuit and a control method thereof. The synchronous rectification control circuit comprises a threshold detection circuit, a threshold generation circuit, an output voltage detection circuit, a logic control circuit, a soft-off circuit and a signal amplification circuit. The threshold detection circuit samples the voltage at the two endsof the drain and the source of the synchronous rectification MOS tube, compares the voltage with an internally set threshold and outputs a corresponding control signal to the logic control circuit; the output voltage detection circuit detects the output voltage, judges whether the output voltage exceeds a preset reference voltage or not, and outputs a signal to the logic control circuit; the logic control circuit processes signals output by the threshold detection circuit and the output voltage detection circuit and outputs a control signal to the signal amplification circuit, and the signalamplification circuit amplifies the control signal and then outputs a synchronous rectification driving signal; and a soft turn-off circuit realizes a soft turn-off function. The synchronous rectification control circuit can enable the primary side detection circuit to be judged easily, and improves the reliability; and the time of secondary side current passing through the body diode is reduced through soft turn-off, and the synchronous rectification efficiency is improved.

The invention discloses methods for automatically detecting the topology of optical transmission monitoring networks and an implementation device. The methods comprise a central site topological method and an ordinary node topological method, wherein a central node is used for initiating a topological query from a central node and downwards routing from a central main site according to a policy of sub-path priority and breaking path return; if the node has multiple sub topological structures, different priority levels of the sub topological structures can be defined, and the priority levels are sequentially traversed from high levels to low levels. The topological routing algorithm can guarantee that all nodes in an optical network can be traversed under the condition of any open path or closed loop and the traversing sequence is consistent with a pseudo coding sequence. The invention also discloses the device for implementing the method for automatically detecting the topology of the optical transmission monitoring networks. The invention is realized based on a synchronous clock transmission system and a hardware structure, has various characteristics of high topology speed (ns level), high reliability, support of chain type, ring type, ring cutting, star-shaped and mixed type optical networks, low implementation cost, and the like and is suitable for the intelligent topology processing of large and medium scaled and even very-large-scaled monitoring optical transmission networks in the field of security.

The invention discloses a method for pulse interference detection and elimination. The method comprises the following steps: step one, pulse interference detection: recording absolute values and Sum (n)s of orthogonal data of path I and path Q, finding out a maximum Sum (n) and a minimum Sum (n) of a present frame, and recording the maximum Sum (n) as MaxVal and the minimum Sum (n) as MinVal respectively; recording found sequence numbers MaxIdx and MinIdx respectively corresponding to the MaxVal and MinVal in the present frame; if (MaxVal-MinVal) / (MaxIdx-MinIdx) is greater than Slope, and (MaxIdx-MinIdx) is also greater than Width, there being pulse interference with an interference interval of [MinIdx, MaxIdx]; otherwise, there being no pulse interference; and step two, pulse interference elimination: selecting an offset interval of pulse interference, chasing a sampling point, and comparing the sampling point with MeanSum*ThreRatio within the selected offset interval. According to the invention, whether there is pulse interference or not can be detected effectively, and performance loss caused by the pulse interference can be reduced. Therefore, the method for pulse interference detection and elimination provided in the invention is suitable for all data communication systems.

The invention discloses a method and system of determining a transformer direct current biasing state with noise detection. The method comprises steps of detecting a noise signal at an assigned noise detection point of a transformer, and extracting a direct current biasing noise feature parameter according to the noise signal; and comparing the direct current biasing noise feature parameter with a preset direct current biasing noise feature parameter threshold, determining the transformer in a direct current biasing state if the direct current biasing noise feature parameter exceeds the direct current biasing noise feature parameter threshold, and otherwise, determining the transformer in a normal state. The system comprises a corresponding noise detection unit, a noise feature parameter extraction unit and a direct current biasing state determination unit. Equipment operation states are not needed to be changed, contact with live equipment is not required, the detection safety is high, and advantages of safety, accuracy, zero misjudgment, independence from sense organ determination and staff operation experience, convenient testing, and manpower and material saving are achieved.

The invention discloses a reversion detecting device and method for an escalator. The reversion detecting device comprises a first detecting device, a second detecting device and a D trigger, the first detecting device and the second detecting device are arranged on one side of a main engine driving wheel of the escalator, and the D trigger is respectively connected with the first detecting device and the second detecting device. The first detecting device and the second detecting device are sequentially arranged in a forward rotating direction of the main engine driving wheel, a CP end of the D trigger is connected with the first detecting device, and a D end of the D trigger is connected with the second detecting device. According to the reversion detecting device and method for the escalator, whether signals sent by the first detecting device lag behind signals sent by the second detecting device or not can be determined through high-low electrical levels output by a Q end of the D trigger, and then whether reversion of the escalator occurs or not can be accurately determined. By means of the reversion detecting device and method for the escalator, the hardware D trigger has the advantages that the response speed is high, and the reliability is good, phase difference between the first detecting device and the second detecting device is not required to be considered, erroneous judgment is avoided, and defects of a 'microprogrammed control unit (MCU) sampling and software computing' method are avoided.

The invention relates to a pattern recognition based barrier-free channel machine bidirectional detection method. The method comprises: (1) representing the state of each infrared pair tube by 4 variables; (2) according to the 4 variable values in step (1) and current infrared pair tube states, judging whether an entry mode or an exit mode exists when passing the barrier-free channel machine; (3) according to the mode judged in step (2) and the corresponding variable value, comprehensively judging whether someone passes; and (4) repeating step (1)-(3). The method disclosed in the invention employs a singlechip to make real-time detection on states of the infrared pair tubes, and conducts processing according to the collected data so as to perform judgment on the personnel getting in and out. The method saves CPU resources, has high real-time performance of detection, has no special demand for the personnel passing speed and strong adaptability, and does not need to increase the number of the infrared pair tubes. When someone takes something or waves hands to a large range, misjudgment cannot be brought about, and the method can also prevent dogging.

The invention relates to a robot collision detection system and method based on a neural network. The method comprises the steps that the actual position of each joint motor is detected and recorded in each instruction period of a robot; the instruction position, the instruction speed and the actual position of each joint motor are taken as input characteristic data of the neural network to predict the position of the joint motor at the current moment; the deviation between the measured actual position at the current moment and the predicted joint motor position is compared, and if the deviation exceeds a set range, it is judged that collision occurs; and otherwise, it is judged that no collision occurs. According to the system and method, no additional hardware equipment is needed, and collision detection can be realized only by a position sensor of the robot. Meanwhile, kinetic parameters of the robot do not need to be known. Collision can still be accurately detected under the working condition that the load of the robot changes, and misjudgment cannot be caused in the acceleration and deceleration process of the robot. The detection method has the advantages of being high in collision detection precision, concise in algorithm, simple in calculation and good in universality.

The invention discloses an unmanned tobacco selling method based on the Internet of Things and trusted identity authentication. The method comprises: when a purchaser needs to purchase tobacco, performing real-name authentication firstly, scanning the identity card of the purchaser, the face acquisition camera acquiring the face portrait of the purchaser and comparing the information on the identity card with the credible identity authentication system of the cloud platform, and if matching is passed, extracting the date and other information on the identity card; the system login module automatically judging whether the tobacco is an adult or not, and after the tobacco is confirmed to be an adult, the purchaser selecting the corresponding tobacco on the touch display screen and paying thetobacco through Unionpay, WeChat or Alipay; and if it is judged that the person is a juvenile, the system returning or terminating the purchase program.

The invention provides a capacitor failure analysis method. The method comprises the following steps: A, observing appearance of a capacitor sample needing to be analyzed, analyzing a possible failure reason; B, X-Raying the capacitor sample needing to be analyzed to confirm the internal structure of the capacitor; C, cutting the capacitor open by a knife, taking a film out of the capacitor sample; D, manufacturing the capacitor sample needing to be analyzed into a micro-sectioned sample; E, using a scanning electron microscope to observe and analyze the micro-sectioned sample; and F, comprehensively analyzing the results obtained from the above steps to determine the reason of capacitor failure. The method has the advantage of simple and clear steps, can accurately analyze the reason of capacitor failure and can avoid erroneous judgment.

The invention relates to a layered scanning method, which comprises the following steps of: coating a lead frame with high temperature-resistance glue; placing a semiconductor device on the lead frame; baking and curing the lead frame; re-packaging the semiconductor device to fill an inclined plane of the semiconductor device into a scanning plane and form an external plastic-sealed body in whichat least the semiconductor is packaged; and scanning an interface of different media inside the semiconductor device by using ultrasonic waves which are perpendicular to the scanning plane and emitted from a scanner. The invention also provides a semiconductor plastic-sealed body. In the invention, changes on the direction of a reflected wave are avoided through the steps of re-packaging a product to be detected and filling the inclined plane on the surface of the plastic-sealed body into the plane; and the invention has the characteristics of high speed, consistency and scanning accuracy andis suitable for daily inspection under the condition of mass production.

The invention provides a judgment method and device for simultaneous commutation failure of high and low end current converters. Firstly the interacting factor of the low end current converter for thehigh end current converter and the interacting factor of the high end current converter for the low end current converter are calculated, then the critical interacting factor of the low end current converter for the high end current converter and the critical interacting factor of the high end current converter for the low end current converter are calculated, and finally the situation of simultaneous commutation failure of the high and low end current converters is judged so that judgment of the situation of simultaneous commutation failure of the high and low end current converters can be realized. According to the technical scheme, the interaction effect of the high end current converter and the low end current converter in the DC power transmission system is considered so that misjudgment of the situation of simultaneous commutation failure of the high end current converter and the low end current converter can be avoided and the judgment result is relatively accurate.

The invention discloses a method and device for detecting and counting blood cell pulse signals based on DSP (Digital Signal Processor) Builder. The detection and the counting of the blood cell pulse signals are implemented on a complex programmable logic device (CPLD) chip by using the DSP Builder according to a digital microparticle signal processing algorithm on the basis of the Coulter principle. According to the invention, characteristic quantities of blood cell signals obtained by a Coulter sensor can be extracted and the classification and identification of four types of pulse signals (single-peak signals, M signals, m signals and abnormal signals) are realized. The method has the advantages that mutant points generated by interference signals can be effectively eliminated, the m signals generated by the edge slip phenomenon can be identified and the M signals generated by horizontal interference (binding phenomenon) can be split. The blood cell quantity counting and the dose-volume histogram counting can be completed while blood samples are efficiently detected. The method disclosed by the invention is suitable for blood cell counting instruments. The method is implemented by adopting the DSP Builder, so that the trouble process for designing the device by using other digital methods is avoided and the design is simplified.

A method for increasing a signal to noise ratio of a capacitive touch device and a capacitive touch device and a touch panel using the same are provided. The capacitive touch device includes a first sensing electrode, a second sensing electrode, a touch detector, a resonant inductor and a detection signal output circuit. An output terminal of the detection signal output circuit outputs a detection signal, such that the resonant inductor and an equivalent capacitor of the first sensing electrode are resonant, and the first sensing electrode receives a resonant sinusoidal wave. When an electric field signal detected by the detecting terminal of the touch detector is smaller than a preset value, it is determined that the capacitive touch device is touched.

The invention discloses an anti-interference photosensitive control light source system which comprises photosensitive sensors, a microprocessor, an electronic switch and a light source, wherein signals of the photosensitive sensors are input into the microprocessor, the microprocessor controls the electronic switch according to the signals of the photosensitive sensors, the electronic switch controls turning on and turning off of the light source, a plurality of photosensitive sensors are arranged, the signals of the photosensitive sensors are all input into the microprocessor, the signals of the photosensitive sensors are calculated in the microprocessor, the results are used as a signal which enables the microprocessor to control the electronic switch, therefore, the photosensitive sensors can not all be interfered with even when an interference source exists in some direction or in some position, misjudgment of the microprocessor can not occur, and the light source can be accurately controlled by the system.

The invention provides a double-click processing method and a slaved electronic device. A misjudgment of double-click operation can be avoided when a main control electronic device is connected with multiple slaved electronic devices. The double-click processing method comprises the steps that a first parameter value corresponding to first-time click operation is received and recorded; a second parameter value corresponding to second-time click operation is received and recorded; whether a first difference value of the second parameter value and the first parameter value meets a preset double-click threshold or not is judged; when it is judged that the first difference value meets the preset double-click threshold, a defined double-click parameter value is sent to the main control electronic device, a defined double-click difference value corresponding to the defined double-click parameter value is located within a system double-click threshold, the system double-click threshold is the double-click condition arranged in the main control electronic device, and therefore the situation that the slaved electronic device conducts double-click operation can be determined by the main control electronic device according to the defined double-click parameter value and the system double-click threshold.

The invention discloses a tobacco automatic vending method and system based on RFID and an identity card (ID card). The tobacco automatic vending system comprises a vending machine main body, the vending machine main body comprises a mainframe and a settlement basket; the basket is arranged below the mainframe, a touch display screen is arranged on the mainframe, a control box is arranged at an upper end of the touch display screen; a single-chip microcomputer, a memorizer, a display module, a payment module, a login verification module, a RFID read-write module and a RFID read-write antenna are arranged in the control box. The automatic vending method disclosed by the invention is simple in structure principle, simple in operation, high in intelligence degree and capable of realizing automatic vending of the tobacco; the tobacco can be prevented from being sold to the juveniles, and an artificial cheating behavior is avoided; furthermore, the correctness of identifying the juveniles is guaranteed, and the misjudgment is avoided.

The invention discloses a method for identifying true and false precious metal ornaments. Appropriate laser pulse energy and defocusing distance are selected according to the material and thickness of a sample; precious metal ornaments are corroded by pulse laser in single points; the primary treatment procedure of the sample is simplified; the corroded material of the metal ornaments is detected by using an inductively coupled plasma source mass spectrometer; a time-resolved figure of an isotope is detected by collecting respective elements; the true and false precious metal ornaments can be known by analyzing the time-solved figure; and the purity of the precious metal can be accurately obtained by standardless analysis. The method has the advantages that the time required for the overall corrosion and signal collection processes is 1-2 minutes; the detection speed is high; in addition, the laser strength is not reduced due to increase of corrosion depth; misjudgment due to the fact that the sample cannot be fully corroded due to over-thickness is avoided; the method is not limited by coating or plating thickness; the identification accuracy is high; the corrosion diameter is 30-80 microns; and the appearance of a solid sample is in a good shape at the macro level.

The invention provides a device for automatically detecting the abrasion of the pantograph pan of a locomotive online. A front trigger switch and a rear trigger switch connected with a data processing and controlling device are fixed to the lateral surface of a detection shed at the height thereof being the same as the pantograph pan; a left background plate and a right background plate are respectively mounted on the left and right lateral surfaces of the detection shed; four image sensors are mounted on the detection shed; wherein a rear left image sensor and a rear right image sensor with the forward and downward viewing angle are respectively aimed at the front parts of the right background plate and the left background plate, and the rear left image sensor and the rear right image sensor are respectively aimed at the right half part and the left half part of a front plate of the pantograph pan of the locomotive when the rear trigger switch is triggered; and a front left image sensor and a front right image sensor with the backward and downward viewing angle are respectively aimed at the rear parts of the right background plate and the left background plate, and the front leftimage sensor and the front right image sensor are respectively aimed at the right half part and the left half part of the pantograph pan of the locomotive when the front trigger switch is triggered. Accordingly, the device capable of carrying out the automatic non-contact dynamic detection on the locomotive online has the advantages of high detection accuracy, safe and convenient application, high stability and reliability and long service life.

The invention discloses a grating and an anti-interference method. The anti-interference method of the grating comprises the following steps that S1, double pulses are transmitted at each time at eachlight spot; S2, the two pulses are wide and narrow, the pulse A is wide first and then narrow, and the pulse B is narrow first and then wide; S3, the interval time of the adjacent pulses is larger than the wide pulse time, namely, it is ensured that the two pulses cannot be connected into one pulse under the condition of interference; S4, the interval from the complete transmission of one light spot to transmission of the next light spot must be larger than the light-emitting time of the whole spot to prevent one light spot from being interfered by two light spots; and S5, during receiving, the two pulses need to be received, and the designated position (A is the first point) is the wide pulse. According to the anti-interference method, judgment can be made once at any phase; the two setsof gratings transmit / receive optical pulses with different characteristics; no matter which relative phase of two optical pulse signals is, the situation of misjudgment or incapability of judgment cannot be caused; mutual interference-free operation of the two sets of gratings is realized; performance such as response time is not reduced; and the operation is stable and reliable.

The invention discloses a mute circuit of a microphone on an earphone, and a method. The mute circuit comprises a toggle switch, a microphone arranged on an earphone and resistance to ground, wherein the first end of the toggle switch is grounded through the resistance to ground; the second end of the toggle switch is in signal connection with an audio signal MIC of an audio jack of the earphone; the third end of the toggle switch is connected to the first end of the microphone; the second end of the microphone is grounded; the second end of the toggle switch is the public end of the toggle switch; and thus, the audio signal MIC of the audio jack of the earphone and the resistance to ground are grounded when the first end and the second end of the toggle switch are connected. By means of the mute circuit of the microphone on the earphone, and the method disclosed by the invention, the mute function of the microphone can be realized stably.

The invention discloses a photosensitive sensor set control system control method which comprises the following steps that (1) a plurality of photosensitive sensors of a photosensitive sensor set are respectively arranged in different geographic positions by different angles; (2) signal values of the photosensitive sensor set are collected, AD operation is carried out on the signal values of the photosensitive sensors; (3) AND operation is carried out on the signal values of the photosensitive sensors of the photosensitive sensor set after AD operation; (4) if the result value of AND operation in the step (3) is true, a photosensitive sensor set output value is true; if the result value of AND operation in the step (3) is false, the photosensitive sensor set output value is false; (5) the value obtained in the step (4) is used as a unique signal value of a control system to control the system. According to the method, an interference source can be effectively prevented from interfering the photosensitive sensors, and accordingly an accurate control value is output.

The invention provides a lathe spindle safety protection device comprising a safety circuit and a wrench fixing seat matched with a lathe chuck wrench. The safety circuit is connected with a lathe drive circuit. The wrench fixing seat is provided with a sensing mechanism. The sensing mechanism comprises multiple travel switches connected with the safety circuit. Contacts of the travel switches point to a wrench storage area at the wrench fixing seat. When the wrench is not fixed to the wrench storage area, the on-off states of all the travel switches are the switch idle states. When the wrench is contained in the wrench storage area, the contacts of the travel switches are all triggered by the wrench, so that the on-off states of the travel switches are changed. When the on-off states of all the travel switches are different from the switch idle state, the safety circuit allows the lathe drive circuit to work. When the on-off state of any one travel switch is the switch idle state, the safety circuit forbids the lathe drive circuit to work. The lathe spindle safety protection device can use the resetting state of the chuck wrench as the lathe starting authentication mechanism, so that the safety is improved.

The invention discloses a medical environment humidification assembly and humidification equipment. The medical environment humidifying assembly comprises a shell, and further comprises a processing assembly, an atomizing assembly and a hot air assembly; the shell provides a supporting and fixing foundation; the processing assembly is used for humidifying and sterilizing air; reflecting plates which are composed of a plurality of plates with reflecting mirrors, and two reflecting plates form a group; reflecting mirrors are arranged on the opposite surfaces of the reflecting plates in the same group, are reflecting surfaces and are used for reflecting ultraviolet light; the side edges of the two reflecting plates in each group are sealed by side edge strips; a plurality of ultraviolet lamps are horizontally fixed at the gaps at the bottom ends of each group of reflecting plates; the top surfaces of air inlet strips are used for feeding air into gaps between the reflecting plates; atomizing nozzles are positioned on the opposite surfaces of each group of reflecting plates and are used for spraying fog drops into the gaps; an atomization assembly is communicated with the atomization nozzles through a pipeline; and a hot air assembly is communicated with air inlets of the air inlet strips through hot air pipes to feed air into the gaps between the reflecting plates. The device can cooperate with humidification, dust removal and sterilization, and the efficiency of the three parts is improved.

The invention discloses a method for identifying true and false precious metal ornaments. Appropriate laser pulse energy and defocusing distance are selected according to the material and thickness of a sample; precious metal ornaments are corroded by pulse laser in single points; the primary treatment procedure of the sample is simplified; the corroded material of the metal ornaments is detected by using an inductively coupled plasma source mass spectrometer; a time-resolved figure of an isotope is detected by collecting respective elements; the true and false precious metal ornaments can be known by analyzing the time-solved figure; and the purity of the precious metal can be accurately obtained by standardless analysis. The method has the advantages that the time required for the overall corrosion and signal collection processes is 1-2 minutes; the detection speed is high; in addition, the laser strength is not reduced due to increase of corrosion depth; misjudgment due to the fact that the sample cannot be fully corroded due to over-thickness is avoided; the method is not limited by coating or plating thickness; the identification accuracy is high; the corrosion diameter is 30-80 microns; and the appearance of a solid sample is in a good shape at the macro level.

The invention discloses a resistance touch panel comprising a first electrode group of a first direction which comprises a plurality of electrodes and the lengths of the electrodes are one unit or two units alternately in sequence; and the touch panel also comprises a second electrode group of the first direction which comprises a plurality of electrodes and the lengths of a plurality of electrodes are two units or one unit alternately in sequence; wherein, the two ends of a plurality of strip layers of the first group of the first direction are respectively connected with the first electrode group of the first direction and the second electrode group of the first direction. The invention aims at proposing the resistance touch panel. When the surface of the resistance touch panel is touched, a plurality of contact points can be generated simultaneously and can be successfully detected out without causing mistaken judging.