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 provides a water pollution organism early warning system based on the principle of microbial fuel cells (MFC), characterized by comprising an MFC sensitive unit, a signal acquisition and processing unit and a remote warning unit, wherein the MFC sensitive unit adopts a three-in-one structure and a continuous flow between the anode and the cathode and contains no noble metal catalysts. The early warning system is installed in a water body to be monitored during online monitoring, raw water enters into the MFC sensitive unit, and the magnitude of external resistance is regulated so as to obtain maximum system sensitivity. The output voltage / current of the MFC sensitive unit is acquired by the signal acquisition and processing unit and is uploaded, stored and displayed on a display in real time after calculation processing. Once the signal changes and exceeds a threshold value, the signal acquisition and processing unit sends a warning cue signal to related monitoring stations and water plants through the remote warning unit. The early warning system and method has high sensitivity and low maintenance cost, and is an efficient unexpected water pollution organism early warning technology.

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 fiber grating measuring system of vehicle running speeds and positions, and the fiber grating measuring system comprises three groups of beam type fiber grating sensing components, wherein a beam type fiber grating sensing component A and a beam type fiber grating sensing component C are distributed in parallel; a beam type fiber grating sensing component B is arranged between the beam type fiber grating sensing component A and the beam type fiber grating sensing component C and forms an angle of 30 DEG to 60 DEG with a sensor start line; each beam type fiber grating sensing component comprises a fiber grating strain sensor, an I-shaped steel beam and a steel tank; the fiber grating strain sensor is struck to one side surface of a web plate of the I-shaped steel beam; and the I-shaped steel beam is arranged at the inner part of the steel tank. The fiber grating measuring system has the characteristics that the structure form is simple, information is convenient to collect, the use is convenient by utilizing the fiber grating strain sensor, and the durability is good and the precision is high, and the fiber grating measuring system is used to measure the running speeds and the positions of vehicles on a bituminous concrete or cement pavement.

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 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 (tmeasured) is corrected by a correction member, in which the temperature of the medium (Tmedium) in the turbine that has likewise been measured, is taken into consideration and compared with a reference value.

The invention provides a water pollution organism early warning system based on the principle of microbial fuel cells (MFC), characterized by comprising an MFC sensitive unit, a signal acquisition and processing unit and a remote warning unit, wherein the MFC sensitive unit adopts a three-in-one structure and a continuous flow between the anode and the cathode and contains no noble metal catalysts. The early warning system is installed in a water body to be monitored during online monitoring, raw water enters into the MFC sensitive unit, and the magnitude of external resistance is regulated so as to obtain maximum system sensitivity. The output voltage / current of the MFC sensitive unit is acquired by the signal acquisition and processing unit and is uploaded, stored and displayed on a display in real time after calculation processing. Once the signal changes and exceeds a threshold value, the signal acquisition and processing unit sends a warning cue signal to related monitoring stations and water plants through the remote warning unit. The early warning system and method has high sensitivity and low maintenance cost, and is an efficient unexpected water pollution organism early warning technology.

The invention discloses an annular whisker optical fiber stress monitoring device which comprises a plurality of annular structures composed of an optical cable, wherein a part of the annular structures is contained in a matrix; and at least one end of the optical cable is connected with a test unit. When a stress is applied to the annular whisker optical cable, the bending curvature of the optical cable is reduced so that the bending curvature of the optical fiber in the optical cable is also reduced to change the bend loss of the optical fiber. A stress signal is transformed into an optical signal and then transmitted to the test unit through the optical fiber, thus achieving the purpose of remote monitoring; and if the optical cable is changed into a pressure-sensitive optical cable, the monitoring sensitivity and the monitoring accuracy of the optical fiber stress monitoring device can be further improved. The annular whisker optical fiber stress monitoring device of the invention has the advantages of simple structure, rational design, convenient processing and manufacturing, flexible usage mode, high sensitivity and good use effect; and testing instruments such as an optical time domain reflectometer and the like can achieve distributed stress monitoring.

The invention belongs to the technical field of industrial robots, and specifically provides an anti-collision monitoring device based on fiber bragg grating. Through laying an optical fiber and a fiber grating sensor on a stainless steel ring, when an obstacle collides with the device, the stainless steel ring is deformed, and the fiber grating sensor can detect the deformation. With strain as amonitoring variable and a fiber bragg grating as a collision monitoring sensor, the device is sensitive in monitoring, fast in signal transmission, low in on-way loss, and resistant in electromagneticinterference. A robot can receive a braking signal at the moment of collision. Multiple collision buffering measures such as rubber sleeves and springs can effectively reduce impact force caused by the collision on the obstacle and a robot body. The device has low cost, is suitable for large-area promotion and application, and signal sensing and transmission adopt optical signals instead of electrical signals, and stability is higher, and damages to a robot host caused by leakage are prevented.

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.

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 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 (tmeasured) is corrected by means of a correction member, in which the temperature of the medium (Tmedium) 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 relates to a Dectin-1 fusion protein expression vector and application thereof, and also relates to construction of the fusion protein expression vector. The Dectin-1 fusion protein expression vector is constructed successfully, Dectin-1 fusion protein with high purity is obtained after the Dectin-1 fusion protein expression vector is transfected to recipient cells, and the obtained soluble Dectin-1 fusion protein can be fixed on the metal surface of an SPR biosensor, thus fungi can be monitored quickly, quantitatively and flexibly in real time.

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 provides a dynamic release method and system of register file cache resources and a processor. The real-time detection can be performed on a long-time delay event under the condition that instructions are not increased or changed, a register file cache table item by which a thread of the long-time delay event is occupied is sent and marked as a preferred replacement request when the long-time delay event is detected, the register file cache table item by which the thread is occupied can be timely marked as the preferred replacement through register file caches after the request is received, the thread can be replaced out in a preferred mode if registers of other threads need to be called into the register file caches from a main register file, and the other threads are not affected. Compared with the prior art, the monitoring on the long-time delay event is sensitive, the instructions do not need to be adjusted, and the efficiency of release recycling on the register file cache resources is high.

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 present invention discloses transgenic salmonella typhimurium TA1535 / Pcda-GFP and a construction method thereof. The preservation number of the transgenic salmonella typhimurium TA1535 / Pcda-GFP is CCTCC NO: M 2011269. According to the construction method, recombinant plasmid with a strong promoter Pcda and green fluorescent protein gene EGFP is transformed into salmonella typhimurium TA1535 to obtain the transgenic salmonella typhimurium TA1535 / Pcda-GFP. Compared to the wild type salmonella typhimurium TA1535, the engineered strain provided by the present invention provides enhanced fluorescence intensity, thus, when the engineered strain is adopted for a toxicity test, the sensitivity of the toxicity test method is improved, the toxic material can be detected conveniently and rapidly. Therefore, the transgenic salmonella typhimurium TA1535 / Pcda-GFP provided by the present invention provides convenience for realization of convenient, rapid and sensitive detection of the toxic material, and can be applicable for popularization and application in detection of the genetic material in the environment.

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.