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

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.

A method, system and apparatus of fault detection in line protection for a power transmission system. A voltage (u) at a measurement point on an electrical line is obtained. The measurement point is apoint at which a protection device for the line protection is installed. A current (i) at the measurement point is further obtained and a differential value of the current is determined. Then, a voltage (u q) at a setting point on the electrical line is determined from the voltage (u) at the measurement point, the current (i) at the measurement point and the differential value of the current (i)according to a time domain lumped parameter model for the electrical line. The voltage change between the determined voltage at the setting point during the fault period and a voltage at the setting point determined during a pre-fault period can be further determined. The fault detection can be performed based on the determined voltage change and a fault threshold. It can ensure voltage determination accuracy and detection reliability with a low sampling rate. Moreover, the solution can work right after the fault inception, almost no waiting time is required, and thus it may achieve a super-fast line protection.

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 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 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 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 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 invention provides a fast detector of Clenbuterol hydrochloride residues which belongs to fast detecting instrument technology. The installation of all the components of the fast detector takes an operation table as the basis. A communication socket is arranged at the center of the front upper part of the operation table. A detection system is inserted in the communication socket. Guide seats are arranged at the two ends of a diagonal of the detection system. Driving components are arranged at the front center of the operation table, directly below the communication socket and the detection system. A control system is arranged at the back center of the operation table, at the due back of the driving parts and is connected with the driving parts. A detection circuit is arranged at the middle-lower back part of the operation table. After all components are arranged on the operation table, the operation table is fixed at the outside opening of a shell with an outer cover covering above the circumference of the operation table, thereby forming a complete enclosed device with the shell. The invention provides a fast detector of Clenbuterol hydrochloride residues which can be used in laboratory situation and non-laboratory situation and has the advantages of small size, field and simple operations and high detection sensitivity of a 1ppb detection limit.

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 discloses a device for realizing a laser positioning method for detecting the baseboard of a storage tank. The device comprises a telescopic rod formed by sleeving a plurality of poles,every pole is provided with a laser emitter, a power supply is arranged at one end of the telescopic rod, and every laser emitter is connected with the power supply. The device uses laser beams emitted by the laser emitters to substitute a manually-drawn auxiliary straight line, the telescoping of the telescopic rod is used to control a distance among the laser beams; and the device can be contracted to a short length in order to be easily carried by a detection personnel, and is simple to operate and use, the emitted laser beams can be clearly seen even in a dark environment, and the device assists a detector in order to effectively reduce the missing detection probability.

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 discloses a method and system for detecting the operational performance of an air traffic control sector. The method includes the steps: Step 1: inputting the sector operational performance index; including: sector traffic index, sector complexity index, sector security performance index, sector economic index and controller workload index; Step 2: use principal component analysis to determine the sector operating performance principal component; Step 3: calculate sector performance comprehensive index based on the sector operating performance principal component. The method of the present invention comprehensively and comprehensively considers the multi-dimensional indicators of the sector performance detection index data that affect the sector performance comprehensive index detection, thereby realizing the effective detection of the sector performance comprehensive index; moreover, the principal component analysis method is applied to In the present invention, the input sector operation performance index is processed, the efficiency of detection is improved, and the actual demand of the air traffic control unit for real-time detection and alarm of the sector performance comprehensive index can be met. Controlled airspace structure has the function of data support.