47results about How to "Guaranteed detection reliability" patented technology

The invention provides a remote sensing image change detection method and system based on mask classification, and the method comprises the steps: 1, the preprocessing of a multiband remote sensing image; 2, the single-band separation of the multiband remote sensing image after preprocessing; 3, the constructing of a single-band difference image of two-phase single-band remote sensing images; 4, the construction of a change mask difference image, and cutting the change mask difference image based on an Otsu method; 5, the multiplication fusion of a change mask with one of the two-phase single-band remote sensing images, thereby obtaining a change region; 6, the clustering of the change region through a fuzzy C mean value method; and 7, determining the change type of the change region through combination of the prior knowledge of the ground object type of the other one of the two-phase single-band remote sensing images according to the clustering results of the change region. The method and system are resistant to nose interference, can alleviate local optimum effectively, can consider the qualitative and quantitative description of an image change process, and is high in change detection precision and reliability.

The invention discloses an intelligent test system and method for a metering device circuit board, belongs to the circuit board detection technology field and solves a problem of low efficiency caused by manual detection existing in a metering device circuit board in the prior art. The intelligent test system comprises a programming device used for realizing programming of function programs into a to-be-tested circuit board, a display performance test device used for testing display performance of the to-be-tested circuit board, a function test device used for testing functions of the to-be-tested circuit board, an identification device used for identifying the to-be-tested circuit board according to test results of the display performance test device and the function test device, a circuit board conveying mechanism which is connected with the programming device and is used for conveying the to-be-tested circuit board to the programming device, and a main control unit used for controlling operation of the programming device, the display performance test device, the function test device, the identification device and the circuit board conveying mechanism. The intelligent test system is advantaged in that the intelligent test system is applicable to circuit board tests of various types of intelligent gas meters.

The invention discloses an integrated sector operation performance detection method based on cluster analysis and a system. The method comprises steps that, step 1, historical sector operation performance index data including a sector passing detection index, a sector complexity detection index, a sector security detection index, a sector economy detection index and a controller work load detection index is inputted; step 2, the historical sector operation performance index data is processed based on a cluster analysis model, and sector operation performance archives are established; step 3, present sector operation performance index data is inputted, and calculation according to the sector operation performance archives is carried out to acquire the largest similarity and the smallest similarity; and step 4, whether sector operation performance is normal is determined according to the smallest similarity. Through the method, the multi-dimensional indexes influencing the sector operation performance are comprehensively considered, the sector operation performance can be effectively detected, detection reliability is guaranteed, actual demands of air traffic control units for real-time sector operation performance detection and alarm can be satisfied, and through the method, data supporting effects are realized for improving control operation management levels and optimizing control spatial domain structures.

The invention relates to a handheld detecting instrument which comprises a casing. One end of the casing forms a handheld portion, and the other end of the casing is provided with a detecting portion; a battery is arranged in the handheld portion of the casing; a circuit board, a light guiding column and a fixing support are arranged in the detecting portion of the casing; a central processing unit (CPU), an emitting coil, a receiving coil, a light-emitting diode and a buzzing alarm are installed on the circuit board; a liquid crystal display and a control panel are arranged on the outer surface of the detecting portion of the casing; the CPU is a processor with phase detecting and identifying functions; the control panel is electrically connected with the input end of the CPU; the light-emitting diode, the buzzing alarm and the liquid crystal display are electrically connected with the output end of the CPU respectively; the emitting coil is electrically connected with the output end of the CPU through a driving circuit; and the receiving coil is electrically connected with the input end of the CPU through a signal amplifying and shaping circuit. The handheld detecting instrument is precise and reliable in detecting, good in anti-interference capacity, complete in functions, capable of being used for detecting objects such as metal, alternating current, wood beams, plastics and the like.

The invention discloses a method and a system for detecting sector operation performance integration indexes based on principle component analysis. The method comprises steps of inputting sector zone operation performance indexes, comprising a sector zone trafficability index, a sector zone complexity index, a sector zone safety index, a sector zone economic index and a control staff workload index, using principle component analysis to determine the principle component of the sector zone operation performance, and calculating comprehensive indexes of the sector zone according to the principle component of the sector zone operation performance. The method disclosed by the invention performs comprehensive consideration on the multi-dimension indexes affecting the sector zone performance detection index data of the sector zone performance comprehensive index detection. Furthermore, the principle component analysis is applied in the invention and the processing is performed on the inputted sector zone operation performance indexes. All in all, the invention improves the detection efficiency, satisfies the requirement for real-time detection and alarming on the sector zone performance comprehensive index by the air traffic control unit, improves the control operation management level, optimizes management control air domain structure and provides data support.

The invention discloses an SCR emission-reduction detection control system and method for a diesel engine. According to the control system, whether the liquid level in a urea tank is lowered or not and whether or not a urea sprayer works normally or not can be detected through a detection control device, and then whether or not a whole SCR emission-reduction system works normally or not is judged;and when it is found that the SCR emission-reduction system is abnormal, a signal is sent back to an ECU system of a whole vehicle in time, and the power of the engine is limited through an ECU of the whole vehicle. By adoption of the SCR emission-reduction detection control system for the diesel engine, the working condition of the SCR system can be detected and recoded on board after the dieselengine is started; the system can be matched with an original on-board diagnosis system to form a dual-detection system, so that the detection reliability is ensured; after the diesel engine is started, the system detects and records the working condition of the SCR system on board to control the power of the whole vehicle, and the power of the engine is limited, so that pollution is prevented from further aggravated; and the system can be additionally arranged easily and rapidly based on an existing on-board detection system, an anti-tamper can be achieved to prevent a driver to refitting the system without permission, and thus, reliable operation of the SCR system is ensured.

The invention provides a detection method of an automatic scanner using laser positioning for welded seam detection. According to the technical scheme, a walking control mechanism is adopted to control a waling mechanism to move so that a scanning mechanism arranged on the walking mechanism can be driven to automatically move and scan, and meanwhile, a distance measuring device is matched with a positioning reference device to ensure that the walking mechanism walks straight. By the adoption of the detection method of the automatic scanner using laser positioning for the welded seam detection,automatic scanning operation can be reliably and stably conducted without building positioning rails, linear scanning can be automatically conducted after the scanner is started, overmuch human involvement is unnecessary, usage is easy and convenient, requirements for detection staff are reduced, bad effects caused by manual misoperation are avoided, the detection efficiency is greatly improved,the labor intensity, the labor cost and the requirements on staff's techniques are reduced, and the detection period is shortened; automatic detection replaces manual detection, so that detection stability and reliability are ensured, and the detection method of the automatic scanner using laser positioning for the welded seam detection can be applied to scanning work at great heights or in severeenvironments.

The embodiment of the invention provides a box door opening detection system, a method thereof, and a control apparatus. The problem of unable normal use of firefighting apparatuses in the fire occurrence process due to use, destroy and stealing of the firefighting apparatuses in the prior art is solved. The box door opening detection system is applied in a fire cabinet or a fire extinguisher cabinet, the system comprises a server and a box door opening detection device connected with the server, the box door opening detection device is used for detecting whether the door of the fire cabinet or the fire extinguisher cabinet is opened or not and transmits detection data to the server, and the server is used for receiving the detection data transmitted by the box door opening detection device. The system, the method and the control apparatus allow the state of the door of the fire cabinet or the fire extinguisher cabinet to be monitored in order to timely find the open state of the door, so a relevant worker can timely confirm the state of the firefighting apparatuses in the body of the cabinet after the cabinet door is opened, thereby normal use of the firefighting apparatuses in the cabinet door in an emergency state is guaranteed, and convenient enforcement and easy popularization and application are realized.

The embodiment of the invention relates to a non-electric area detection and control method for a rail transit vehicle. The method comprises the steps of: generating subsystem load power through real-time power calculation; uploading the subsystem load power to a network system central processing unit; sending the working condition state identifier, the traction motor and the AC / DC load power setto all subsystem controllers by the network system central processing unit; when Usam is smaller than U0, calculating the total capacitance capacity by the subsystem controller; calculating the totalload power according to the working condition state identifier; generating a segmented detection power point set; generating segmented detection descending slope points according to the segmented detection power point set, and determining a trigger frequency set through segmented detection; judging whether to enter a power-free area or not according to the subsystem load power, the segmented detection power point, the segmented detection descending slope point and the segmented detection affirmation triggering frequency set; when it is judged that the system enters the power-free area, blocking subsystem inverter pulses, and executing contactor disconnection operation on a subsystem bus contactor.

The invention relates to an anti-pinch system applied to a track traffic platform. The anti-pinch system applied to the track traffic platform comprises a light curtain module and a master control module. The light curtain module used for gap scanning is arranged between a platform screen door and trains. The master control module controls the trains to draw out of the station according to the scanning result of the light curtain module. The light curtain module comprises at least two pairs of sensing devices which are arranged from bottom to top. The platform screen door comprises a movable door and a fixed door. From the low level to the high level, the gap protection safety level of the anti-pinch system is divided into a safety level I, a safety level II and a safety level III. The safety level of the distance between the center line of probe beams of the sensing device and the trains and the distance between the center line and the movable door is not lower than the safety level II. The safety level of the distance between the center line of the probe beams and the fixed door is not lower than the safety level III. The design of the anti-pinch system adopts different safety levels according to the differences between adults and children, between the movable door and the fixed door and between the straight-line platform and the curve platform, and has high detection reliability.

The invention provides a board card in-place detection device and method. The device comprises a BMC, a CPLD, a connector and an insertion card. A first path of a first in-place pin on the connector is connected with a power supply, and a second path of the first in-place pin is connected with a GPIO pin of the CPLD; an I2C pin on the connector is connected with an I2C pin of the BMC; a second in-place pin on the insertion card is connected with the ground; the I2C pin on the plug-in card is connected with the FRU of the board card, and the level of the first in-place pin is opposite to that of the second in-place pin; and when the plug-in card is plugged into the connector, the BMC judges whether the plug-in card is reliably plugged or not by searching an internal preset address corresponding relation table. Based on the device, the invention further provides a board card in-place detection method. Only one in-place pin is used for carrying out preliminary in-place detection, in-placeconfirmation is carried out by multiplexing I2C signals, the detection reliability is ensured, UART communication is used between the BMC and the CPLD, and the timeliness of in-place detection is ensured.

The invention provides a rotary speed control apparatus. A centrifuging assembly is arranged on a connecting assembly; a connecting rod assembly is connected with the centrifuging assembly; the connecting rod assembly is connected with a dynamic inductive magnetic coil of an electromagnetic induction assembly; the dynamic inductive magnetic coil and a fixed inductive magnetic coil of the electromagnetic induction assembly form an inductive magnetic coil; the fixed inductive magnetic coil is connected with a power supply; and the dynamic inductive magnetic coil is connected with a signal processor. The rotary speed control apparatus provided by the invention adopts mechanical structural design, so that speed detection and control reliability is ensured; centrifuging force of a centrifuging claw is utilized and the centrifuging force is amplified through the connecting rod assembly and is converted into electromagnetic induction; rotary speed detection and control is realized through the distance of the two magnetic inductive coils in electromagnetic induction; the centrifuging claw disclosed in the invention adopts a hollow structure, and a high-density sphere at the centrifuging end is adopted in an auxiliary manner, so that centrifuging force embodiment in high-speed change can be improved; and in addition, the rotary speed control apparatus is creative and reasonable in structure and particularly suitable for rotary speed detection and control in severe environments.

The invention discloses a railway goods inspection intelligent detection device. The device comprises a portal frame which is fixed on the ground and allows a freight train to pass through; a first image acquisition unit which is fixed at the top of the portal frame and is used for shooting images at the top of the freight train; a second image acquisition unit which is mounted at the left side ofthe portal frame, faces the freight train and is used for shooting images at the left side of the freight train; a third image acquisition unit which is mounted at the right side of the portal frame,faces the freight train and is used for shooting images at the right side of the freight train; an infrared imaging camera which is fixed at the top of the portal frame; a laser radar which is fixedto the top of the portal frame; a speed measuring radar unit which is installed at one side of the portal frame and is used for detecting the running speed of the freight train; and a power supply unit which is connected with the first image acquisition unit, the second image acquisition unit, the third image acquisition unit, the infrared imaging camera, the laser radar, the speed measuring radarand a vehicle cutting sensor.

The invention provides a control method of a chemiluminescence detector. The method includes the following steps that: a position on a reaction outer disk mechanism, which is corresponding to a cup addition station, is in a no-load state, a sample cup gripping mechanism is controlled to transfer a first target reaction container from a buffer disk mechanism to the reaction outer disk mechanism; when the reaction outer disk mechanism drives the first target reaction container to rotate to a reagent adding station, a liquid transfer mechanism is controlled to add a target reagent to the first target reaction container; and when the reaction outer disk mechanism drives the first target reaction container to rotate to the cup adding station, the sample cup gripping mechanism is controlled to transfer the first target reaction container from the reaction outer disk mechanism to the buffer disk mechanism, so that a sample addition mechanism can absorb the target reagent. With the chemiluminescence detector, the control method and system of the chemiluminescence detector of the invention adopted, the automation degree and detection efficiency of the chemiluminescence detector are improved, and the detection accuracy and reliability of the chemiluminescence detector can be ensured.

The invention discloses an automatic scanner for welding seam detection for laser positioning. The automatic scanner comprises a walking mechanism and a positioning reference device, wherein the positioning reference device is detachably arranged on a to-be-tested workpiece and used for assisting positioning guiding; the walking mechanism comprises a walking frame and a walking part, and the walking part is used for supporting the walking frame to move on the to-be-tested workpiece; a walking control mechanism, a distance measuring device and a scanning mechanism are arranged on the walking frame, the walking control mechanism is used for controlling the walking part to walk, and the distance measuring device is used for measuring the distance between the walking mechanism and the positioning reference device so as to ensure the movement direction of the walking mechanism; the scanning mechanism is moved along with the walking mechanism to scan. The automatic scanner has the advantagesthat the intelligent effect is realized, the operation is convenient and rapid, and the like; the problems of technology distortion and scanning missing due to low manual scanning accuracy are solved; the labor intensity of a detection worker can be decreased, the detection efficiency is improved, and the like.

The invention relates to an ultrasonic pipe wall thickness measuring device. The ultrasonic pipe wall thickness measuring device comprises an ultrasonic probe, a reflector, a fixed shaft, a stator, a rotor and a rotor outer shell. The fixed shaft is arranged in the center inside the rotor outer shell, the stator is connected to the fixed shaft in a concentric mode, the rotor is connected to the inner side wall of the rotor outer shell in a concentric mode, the ultrasonic probe is connected to the fixed shaft, the reflector is connected to the rotor outer shell, and an acute angle is formed between the direction of a reflector face and the direction of ultrasonic propagation. According to the ultrasonic pipe wall thickness measuring device, the stator is connected to the fixed shaft, the fixed shaft does not rotate, the rotor is arranged on the rotor outer shell and rotates around the fixed shaft, the rotor rotates evenly and stably after being powered on and drives the reflector to rotate, and ultrasonic waves generated by the probe are vertically reflected to the inner circumferential surface of a pipe wall through the reflector; when the ultrasonic pipe wall thickness measuring device is used underwater, water in the device is centrifugally thrown out through holes formed in the circumferential direction, impact of axial water flow on the reflector face is quickened, the reflector face can be cleaned automatically, therefore, the degree of finish of the reflector face is improved, the ultrasonic waves can not be scattered, and consequently, detection precision is improved.

The invention relates to a live-line tester for a lightning arrester, wherein the live-line tester is used for live testing of a lightning arrester of an intelligent transformer station. The live-line tester is connected with a lightning arrester that needs to be tested and has the 220-V power voltage in the transformer station. A voltage phase compensation module is embedded into the live-line tester. A signal collection system of the voltage phase compensation module collects a voltage signal of 220-V voltage and a current signal of the transformer station and inputs the signals into a signal conditioning system. The signal conditioning system enables the collected 220-V voltage signal and current signal to be processed by voltage compensation by a connected high-voltage coil and low-voltage coil and thus the voltage and current signals are compensated by the obtained phase consistent with the bus voltage; and the signals pass through a current sensor, an operational amplifier, a resistor, a capacitor, and an AD converter and are connected with a single-chip microcomputer. According to the invention, for live detection work of the lightning arrester, the PT voltage is not collected directly on the premise that detection reliability is ensured; and the accurate phase of the PT voltage is obtained by the 220-V voltage in the station. Therefore, the live testing work efficiency of the lightning arrester and the field equipment security operation stability are improved.

The invention relates to ammonia nitrogen detection equipment and a water quality detection method. The ammonia nitrogen detection equipment comprises an ammonia gas generation unit; an ammonia gas detection unit; the ammonia gas generation unit comprises an electrolysis electrode, and the electrolysis electrode electrolyzes a to-be-detected water body entering the ammonia gas generation unit to generate OH <-> under a current condition; the ammonia gas detection unit comprises an ammonia nitrogen detection part, the ammonia nitrogen detection part comprises a reaction cavity and a spectrum detection part, and the spectrum detection part is used for carrying out spectrum detection on the reaction cavity.

The invention relates to an asphalt multiple harmful gas indoor detection device and detection method; the asphalt multiple harmful gas indoor detection device comprises a three-neck flask, a heatingunit, a stirrer and a detection unit; the detection unit comprises a detection closed box and a pumping type gas analyzer arranged in the detection closed box; the three-neck flask is respectively provided with a gas inlet, a gas outlet and a middle opening, and a stirring shaft of the stirrer is arranged in the three-neck flask through the middle opening; the gas outlet is connected with an exhaust pipe, the gas inlet is connected with an air inlet pipe, the exhaust pipe and the gas inlet pipe are both led into the detection closed box to form an internal circulation system or a controllableopen system; during testing, asphalt harmful gas flows, and the pumping type gas analyzer performs real-time detection. The device provided by the invention is not influenced by external environmentalfactors, can meet various test requirements, and solves the problem of numerical instability of generation and detection of asphalt harmful gas.

The invention discloses a safety reminding system for preventing high-voltage electric shock. Thesafety reminding system comprises a main control module and a bottom layer device; the bottom layer device comprises a sensing module, a power supply module, a communication module and a warning module, and the sensing module, the power supply module, the warning module and the communication module are respectively connected with the main control module; the power supply module is used for supplying power to the main control module, and the main control module controls the power supply module; the sensing module is used for detecting whether someone invades in a specific range or not in real time and feeding back detection information to the main control module, and the main control module analyzes the detection information to obtain a warning control instruction and controls the warning module to give a warning based on the warning control instruction. The three detection modes of infrared detection, microwave detection and camera monitoring are mainly combined for use, the detection reliability is guaranteed through complementary use of the different detection modes, and the problem of missing report is solved; three alarm modes effectively prompt fishing personnel beside the high-voltage power transmission network.

The technical scheme of the invention discloses a device for a laser positioning method for realizing storage tank bottom plate detection. The device comprises a telescopic rod formed by connecting multiple supporting rods in a sleeving manner, wherein a laser emission device is arranged on each supporting rod; a power supply is arranged at one end of the telescopic rod; and the laser emission devices are all connected with the power supply. According to the device, laser beams emitted by the laser emission devices replace artificially drawn auxiliary straight lines, and the distance between the laser beams is controlled by utilizing retraction of the telescopic rod; and the device can shrink to a smaller length, is convenient to be carried by detection personnel and is easy to operate anduse, the emitted laser beams can be clearly seen in a dark environment, and the missing inspection probability can be effectively decreased by an auxiliary detecting instrument.

The invention provides an accurate temperature measurement hot air gun. The accurate temperature measurement hot air gun comprises a shell. A circuit board and a hot air device for producing hot air are arranged in the shell. The front end of the shell is provided with a hot air pipe for discharging the hot air produced by the hot air device. The hot air gun further comprises a detection device. The detection device comprises a temperature measurement probe which is an infrared probe. The front end of the shell is sleeved with a fixing frame. The temperature measurement probe is arranged on the fixing frame. In this way, installation and fixing of the temperature measurement probe are facilitated, and the stability and reliability of the temperature measurement probe during detection are guaranteed. Accordingly, the detection accuracy of the detection probe is guaranteed so as to guarantee the good working effect of the hot air gun. The adaptability of the hot air gun is improved, andthe application range of the hot air gun is enlarged. The operation stability and reliability of the hot air gun are guaranteed.

The present disclosure provides a high-sensitivity smoke alarm, a system and a method, including a housing, a light source, a transmitting optical fiber, a receiving optical fiber, at least one smoke detection chamber and at least one reference chamber, a first inspection photodiode, a first reference Photodiodes and microcontrollers, by setting the smoke detection cavity and the reference cavity, and comparing the signals of the smoke detection cavity and the reference cavity during smoke detection, effectively overcome the false alarm of the smoke alarm caused by environmental factors such as temperature changes , by setting up multi-layer smoke detection layers, each layer is equipped with a smoke detection chamber and a reference chamber, and by detecting the smoke detection signal in each layer of smoke detection chambers, the layered detection of smoke is realized to prevent dust and other environmental factors from causing Only a certain layer or a few layers detect false alarms caused by "false smoke signals", thereby further improving the accuracy of smoke detection.

The invention belongs to the field of stable enameling film thickness detecting and alarming of the enamelled wire production and particularly relates to an enamelled wire surface enameling film thickness online detection system. The system comprises a discharging component, a detection acquiring component which is used for discharging to an enamelled wire and acquiring the grounded voltage and a control alarming component, and the control alarming component is used for comparing the acquired signals and alarming when the acquired voltage drop is higher than a preset voltage drop constantly in a determined period; the detection acquiring component at least comprises a wire pressing wheel portion, and a concave wheel groove is formed in the edge of the wire pressing wheel portion annularly; a voltage sampling circuit is arranged at a frame of an enameling machine provided with a grounded end; the wire pressing wheel portion comprises upper and lower wire pressing wheels with axle arranged horizontally, and the upper and lower wire pressing wheels are arranged on two sides of the advancing direction of the enamelled wire and are arranged in the advancing direction of the enamelled wire sequentially. The system has the advantages that the detecting efficiency is high, and the system is capable of implementing online accurate detection of the enamelled wire accurately in the high speed advancing process of the enamelled wire.

The invention belongs to the field of stable enameling film thickness detecting and alarming of the enamelled wire production and particularly relates to an enamelled wire surface enameling film thickness online detection system. The system comprises a discharging component, a detection acquiring component which is used for discharging to an enamelled wire and acquiring the grounded voltage and a control alarming component, and the control alarming component is used for comparing the acquired signals and alarming when the acquired voltage drop is higher than a preset voltage drop constantly in a determined period; the detection acquiring component at least comprises a wire pressing wheel portion, and a concave wheel groove is formed in the edge of the wire pressing wheel portion annularly; a voltage sampling circuit is arranged at a frame of an enameling machine provided with a grounded end; the wire pressing wheel portion comprises upper and lower wire pressing wheels with axle arranged horizontally, and the upper and lower wire pressing wheels are arranged on two sides of the advancing direction of the enamelled wire and are arranged in the advancing direction of the enamelled wire sequentially. The system has the advantages that the detecting efficiency is high, and the system is capable of implementing online accurate detection of the enamelled wire accurately in the high speed advancing process of the enamelled wire.