66results about How to "Sensitive monitoring" patented technology

A load cell deflasher for the punch and die deflash processing of product from an extrusion includes a load cell pressure transducer interconnected with a punch to sense pressure measurements of the punch against the extrusion at the die and communicate the measurements to a programmable logic controller that controls the extension and retraction of the punch to the die and the structure accommodating pre-punch alignment of the extrusion to the die. The pressure measurements are logged in a trending database of the programmable logic controller. If a pressure measurement exceeds a threshold value, to programmable logic controller can command instruct a positioning actuator of the punch to abort its punch stroke prior to completion. If the programmable logic controller determines an upward trend of pressure measurements, an auto-tune mode of the programmable logic controller can command instruct an extrusion card transfer positioning actuator to adjustably position a gripper carriage transferring the extrusion in intervening proximity between the punch and die to an optimal position for extrusion deflashing.

The invention relates to a hybrid fault diagnosis method based on qualitative signed directed graph (SDG) in the petrochemical process. The method comprises the following steps: the characteristic data of the key nodes in a fault state of the process flow are extracted to store in a expert knowledge base; the fuzzy logic and the principle component analysis (PCA) are combined to obtain the hybrid algorithm of fault diagnosis based on SDG; for a built SDG model, the hazard and operability analysis (HAZOP) is performed through automated reasoning; and the analysis result is stored in a fault knowledge base in the expert knowledge modes of fault sign, fault cause, propagation path, unfavourable result and treatment measure. A hybrid expert knowledge system is mainly composed of an expert system and HAZOP analysis results. By adopting the method of the invention, the problems of the fault diagnosis technology in fault detection and diagnosis speed, diagnosis completeness and accuracy, diagnosis resolution and robustness and the like can be solved.

The invention relates to a segmented constant-temperature modular electrothermal tea leaf fixation machine. A motor is mounted on a stander; a roller base is mounted on the stander; a roller is mounted on the roller base; a speed reduction box is mounted on an output shaft of the motor; a gear is mounted on an output shaft of the speed reduction box and drives a belt wheel mounted on a supporting seat; the belt wheel drives a friction wheel meshed with the roller so as to enable the roller to rotate; an inlet funnel is arranged at the left end of the roller; a ventilating hole and a box cover are arranged at the top of the roller; a temperature control system is arranged on the box cover; an electric heating plate is mounted on the outer surface of the roller and is connected with the temperature control system. According to the fixation machine, the conventional heating mode is changed, and a PLC control technology, a modern control theory and a frequency change control technology are combined; the temperature control system of an electric heating roller fixation machine based on PLC control is designed, so that the temperature control precision, the automation degree and the interference resistance of the fixation machine are improved, and influence caused by manmade factors in actual production is reduced.

The invention relates to an apparatus for application of a magnetic field to a sample, in particular an elongated sample. At least in places, the apparatus has magnetic bodies which are arranged such that they can rotate with respect to one another and have, and leave open, a common access opening for the sample. In particular, this allows the apparatus to be applied to an elongated sample whose ends are not accessible. As a result of the bodies being arranged such that they can rotate with respect to one another, the magnetic fields of the bodies can be adjusted with respect to one another before the apparatus is opened and closed, so as to minimize the magnetic field in the common access opening. In consequence, only small magnetic interaction forces need be overcome during opening and closing.

The invention provides a high precision monitoring and early warning system and method for roof deformation, and relates to the technical field of roadway deformation monitoring and early warning. Thesystem comprises an explosion-proof optical fiber sensor, a sensor integration device, a signal conversion device, a data transmission device and a data processing unit, the explosion-proof optical fiber sensor converts a roof displacement signal into spectral information, the sensor integration device is connected with the explosion-proof optical fiber sensor within the same monitoring range, the signal conversion device is connected with the sensor integration device, so that the spectral information is converted into an electronic signal, and the data transmission device transmits the electronic signal to the data processing unit. According to the high precision monitoring and early warning system and method for roof deformation, when the system is used for monitoring, the explosion-proof optical fiber sensor is installed in a selected monitoring area, each component of the system is connected to monitor the displacement of a roof, a central controller and the data processing unitestablish a spatial three-dimensional model of surrounding rocks, the roof deformation is determined in real time according to the deformation monitoring and spatial coordinates, and monitoring is more accurate and convenient and also has the advantages of sensitivity and intuition.

The invention discloses a composite cement-based material and a composite cement-based material sensor. The composite cement-based material comprises cement mortar, and the cement mortar is doped witha carbon fiber material grafted with carbon nanotubes. The composite cement-based material sensor comprises the composite cement-based material, a conductive rust-proof part arranged on the surface of the composite cement-based material, an epoxy resin coating layer arranged on the conductive rust-proof part, and an insulation board arranged on the outer side of the epoxy resin coating layer. Thecarbon fiber grafted with the carbon nanotubes is good in dispersity in a cement base and higher in interface bonding capacity with the cement base. The composite cement-based material sensor is simple in structure and sensitive in monitoring, can be suitable for mass concrete in various environments, and can accurately monitor the internal stress condition of the concrete so as to judge the damage degree and the corrosion condition of the concrete.

The invention discloses an unloading platform for building construction. The unloading platform comprises main beams and a plurality of sets of cross beams, wherein the multiple sets of cross beams are connected to the positions between the two sets of parallel main beams. The unloading platform is characterized in that a bottom frame is fixedly formed between the main beams and the cross beams, alateral sealing plate arranged in the circumferential direction of the bottom frame and a bottom sealing plate located on the top face of the bottom frame are attached to the bottom frame, a door body is further arranged on the face, facing a building, of the lateral sealing plate, and the unloading platform further comprises at least three weighing modules located at the top corners of the bottom frame. The unloading platform can save time and labor when being mounted and dismounted.

The invention discloses an evaporative cooling medium leakage monitoring and treating system. The evaporative cooling medium leakage monitoring and treating system comprises a medium monitoring device and a medium treating device, wherein the medium monitoring device comprises an oxygen sampling box, a cooling medium sampling box, a sampling pipe and a monitoring controller, both the oxygen sampling box and the cooling medium sampling box are installed on the inner wall of a motor fan housing, and the cooling medium sampling box is located below the oxygen sampling box; the medium treating device comprises an air suction nozzle, a pipeline and a medium recovering processor, the air suction nozzle is installed inside the motor fan housing, the medium recovering processor is installed outside the motor fan housing, and the air suction nozzle is connected with the medium recovering processor through the pipeline; the monitoring controller and the medium recovering processor are connected through a cable, and the oxygen sampling box and the cooling medium sampling box are connected with the monitoring controller through the sampling pipe. According to the evaporative cooling medium leakage monitoring and treating system, redundant gas-state cooling media are sucked and treated through the medium treating device, in this way, the content of gas-state cooling media in the fan housing can be effectively controlled, and the personal safety of workers is guaranteed.

The invention discloses a nitric oxide electrochemical sensing microelectrode and a preparation method and application thereof. The electrode is characterized in that a microelectrode inner core is formed by carbon fibers, the electrode inner core is sequentially modified by a gold deposition layer, an NO electro-catalysis compound layer and a fluorinated xerogel shielding layer from inside to outside, and the complete microelectrode is formed by the multiple modification layers. According to the prepared NO electrochemical sensing microelectrode, rapid detection of NO is achieved through an electrochemical analysis method, needed electrochemical instruments are simple, selectivity is good, the analysis speed is high, the detection cost is low, microminiaturization is easy to achieve, response is rapid, and monitoring is sensitive. The nitric oxide electrochemical sensing microelectrode provided by the invention is helpful for solving the problems of low selectivity and sensitivity of existing NO detection, is a high-performance NO microsensor, can further expand the NO detection application, and provides important detection and sensing devices for environmental monitoring and NO physiological function research.

The invention relates to a method for monitoring the condition of turbines using their coasting time. The aim of the invention is to ensure that the monitoring process is as sensitive as possible with low resource requirements. To achieve this, the measured coasting time (t_measured) is corrected by means of a correction member, in which the temperature of the medium (T_medium) in the turbine that has likewise been measured, is taken into consideration and compared with a reference value.

The invention discloses a microbial fuel cell-based underground water organic pollution monitoring device and method and belongs to the technical field of water environment monitoring. The microbial fuel cell-based underground water organic pollution monitoring device comprises a device body, a water inlet pipe communicated with the device body and a battery device arranged inside the device body,wherein the battery device is composed of an anode chamber and a cathode chamber which are connected via wires, and a current monitoring device is arranged between the anode chamber and the cathode chamber; the top and the bottom of the device body are provided with openings, and the bottom of the device body is inserted into bottom mud of underground water; one end of the water inlet pipe is arranged inside the underground water, and the other end of the water inlet pipe is communicated with the device body; the anode chamber is arranged inside the bottom mud inside the device body, and thecathode device is arranged in the underground water inside the device body. The microbial fuel cell-based underground water organic pollution monitoring device can achieves real-time in-situ underground water monitoring and is applicable to in-situ field work and high in monitoring precision.

The invention discloses a monitoring method of a distributed optical fiber sensing system. The monitoring method comprises the following steps of: S1, dividing a detection optical fiber into a key monitoring area and a non-key monitoring area according to an object to be detected; S2, in the process of monitoring optical fiber deployment, measuring and recording the length of each interval distribution ; S3, inputting the length of each interval distribution into a resolving system as an input parameter; S4, inputting the scanning frequency of each interval distribution into the resolving system, the scanning frequency of the key monitoring area being far greater than the scanning frequency of the non-key monitoring area; S5, enabling the resolving system to calculate the time when the light passes through each monitoring area, and switch the scanning frequency according to the time; and S6, enabling the resolving system to output peak variation so as to measure the strain and temperature variation of the to-be-measured object. According to the method of the invention, the data acquisition range and the data scanning frequency of the distributed optical fiber sensing system are reasonably adjusted, and the data calculation efficiency is improved.

The invention relates to a control method for an unmanned logistics vehicle, and the method sequentially comprises the following steps: S1, planning and setting a driving path of the unmanned logistics vehicle, and transmitting an instruction for executing a freight task and the driving path to the unmanned logistics vehicle; S2, receiving the position coordinates of the unmanned logistics vehicle, and calculating the shortest distance from the position coordinates of the unmanned logistics vehicle to the driving path; S3, judging whether the shortest distance from the position coordinates of the unmanned logistics vehicle to the driving path exceeds a threshold value or not, if not, repeating the step S3, and if yes, entering the step S4; and S4, giving an alarm to inform monitoring personnel to carry out processing. The invention further relates to monitoring equipment for the unmanned logistics vehicle and a transportation system adopting the control method.

The invention discloses a self-adaptive dry and wet distinguishing method based on multiple statistics of a microwave link. The correlation degree between statistical parameters of link attenuation data and dry and wet moments is analyzed by adopting a statistical means, the statistical parameters with high correlation degree are adaptively selected as feature vectors by taking the correlation degree as a criterion, and dry and wet distinguishing in a weather change process is realized by utilizing classification algorithms such as a support vector machine and the like. According to the self-adaptive dry and wet distinguishing method, the dry and wet moments can be distinguished through microwave link signal changes, continuous weather monitoring can be effectively achieved, and the self-adaptive dry and wet distinguishing method has important significance in further improving the microwave link rain measurement precision, improving the application benefits of the microwave link rain measurement method and the like.

The invention discloses a method of improving blue algae in-situ detection precision by using an anti-fluorescent interference decoupling algorithm. The method depends on a fluorescent analysis method, and measurement can be achieved by taking phycocyanin as a major pigment index for detecting blue algae biomass, and using a fluorescent spectrophotometer that is relatively simple to operate in a laboratory. The method can effectively avoid mutual influence of chlorophyll a, chlorophyll b and the phycocyanin; the blue algae biomass in fresh water is monitored accurately; relatively precise alga biomass data is provided for early warning of blue algae water bloom; a theoretical basis is provided for subsequent design of a blue algae biomass detection sensor; the method can be also used for avoiding interference among multiple pigments to the greatest extent when the fluorescent pigments are detected by a fluorescent method; a theoretical basis is provided for scientific and reasonable screening excitation light wavelength and emitting light wavelength in fluorescent analysis; a multivariant correcting feedback piecewise linear detection model is established when an algal pigment concentration in a water body is detected by the fluorescent method; and precise detection of the pigment concentration is achieved.

The invention discloses an aluminum alloy mould capable of automatically controlling temperature. The aluminum alloy mould capable of automatically controlling the temperature comprises an aluminum alloy lower mould body, an aluminum alloy upper mould body, a mould cavity, temperature-controlling pipes, an electronic valve, a controller, a transmission pipe, and temperature sensors. The temperature-controlling pipes are correspondingly arranged inside the aluminum alloy upper mould body and the aluminum alloy lower mould body; one end of the transmission pipe is connected with the temperature-controlling pipes, and the other end of the transmission pipe is connected with the electronic valve; the temperature sensors are arranged on the inner parts of the aluminum alloy upper mould body andthe aluminum alloy lower mould body; and the electronic valve and the temperature sensors are electronically connected with the controller. According to the aluminum alloy mould capable of automatically controlling the temperature, in the injection molding process of products, the controller controls the electronic valve according to written injection mould temperature parameters to control the flow speed and the flow amount the water or oil inside the temperature-controlling pipes so as to control the temperature of the aluminum alloy mould, and heat dissipation, heating and temperature controlling of the aluminum alloy mould are realized; and automatic control is achieved, and aluminum alloy mould is simple in structure, low in cost, high in practicability, and suitable for large-scaleinputting use.

The invention relates to the field of textile machinery, and discloses a flat knitting machine automatic stop system which comprises a side thread frame. The side thread frame comprises a frame body,a monitoring assembly, a plurality of jumping rods and a rotating shaft, wherein one end of each jumping rod is connected to the outer side of the rotating shaft in a sleeving mode and is rotationallyconnected to the outer side of the rotating shaft, and a wire ring is fixed to the other end of each jumping rod. A magnetic piece is further fixed to the side face of each jumping rod, and the gravity center of each jumping rod deflects to the side, away from the frame body, of the rotating shaft. The monitoring assembly comprises a monitoring rod located on the side, away from the frame body, of the rotating shaft. The monitoring rod is provided with magnetic sensors equal to the jumping rods in number. When the jumping rods rotate away from the frame body with the rotating shaft as the axial direction, the magnetic pieces correspond to the magnetic sensors one to one and rotate to get close to the magnetic sensors. The magnetic sensors are directly or indirectly electrically connectedwith a working system of a flat knitting machine, electric connection is formed without contact, meanwhile, the requirement for limiting the impact force of the jump rods on the monitoring rod is alsomet, monitoring is sensitive, and shutdown alarm response is rapid and accurate. The invention discloses a control method of the flat knitting machine automatic stop system. The further improvement of the automatic stop system of the flat knitting machine is facilitated.

The invention discloses an optical fiber sensing device with waveform grooves and a cylinder body, wherein the waveform grooves (4) are distributed on the cylinder body (10); wave crests and wave troughs which are staggered and corresponded to each other are arranged on two opposite planes of the waveform grooves (4); and a first signal optical fiber (6) is arranged between wave crests on two opposite planes of the waveform grooves (4). When the cylinder body (10) is deformed under stress, the distance between wave crests at two opposite sides inside the waveform grooves (4) on the cylinder body (10) is changed, then a bending curvature of the first optical fiber (6) arranged between the wave crests is changed, so that the bending loss of the first optical fiber (6) is changed; the stress on the cylinder body (10) can be calculated through a testing unit (5) and a processing unit (7); and a novel sensing device is formed through the organic combination of the cylinder body (10) and the micro-bending waveform grooves (4).

The invention discloses an oxygen supply interruption alarm device for a sea cucumber seedling raising pond. A direct current closed loop consists of three parts, namely an air flow flowing monitoring pipe fitting, a lead-acid storage battery and a buzzer, wherein an inner structure of the air flow flowing monitoring pipe fitting comprises a rotary contact piece, a positive contact piece, a negative contact piece, a rotating shaft, a protective shell and the like; when air flow passes through the rotary contact piece, the closed loop is cut off, and the buzzer is turned off; when no air flow passes through the rotary contact piece, the closed loop is connected, and the buzzer is turned on; the pipe diameter of the air flow flowing monitoring pipe fitting is DN25-DN150 and is the same as that of a blast pipe; the air flow flowing monitoring pipe fitting can be used as a pipe fitting to be arranged on the blast pipe; the lead-acid storage battery output voltage of 6-12V; and the buzzer is a piezoelectric alarm sound buzzer with rated voltage of 6-12V and sound level of more than or equal to 90dB. By adopting the device, the problem of heavy loss of seedlings caused by oxygen supply interruption in the case of shortage of a seedling raising pond oxygen supply interruption alarm device in a seedling raising workshop in a sea cucumber chamber is solved; and the device is suitable for seedling raising and production of the sea cucumber.

The invention relates to a composite current sensor for an XLPE power cable in a switch cabinet. The composite current sensor centers on integration of a zero sequence current transformer and a high-frequency current transformer, and main parts include an annular magnetic line-frequency induction coil, a radio-frequency induction coil, a housing secondary terminal and the like. The radio-frequency induction coil and the line-frequency induction coil use ferrites as magnetic cores. The two coils are respectively wound around the magnetic cores and meanwhile are packaged by epoxy resin, the two coils are different in center frequency and bandwidth and does not affect each other during normal working.