61results about How to "Reduce monitoring blind spots" patented technology

The invention relates to a slope turn traffic command system based on wireless sensor network. The system is composed of a perception subsystem based on wireless sensor network and a traffic reminding subsystem; the perception subsystem comprises a sensor module and a wireless transmission module; the wireless transmission module comprises a wireless transceiving converging node, a cluster-head node and a wireless control subnode; the sensor module is connected with the cluster-head node and mounted on the face and two sides of the slope turn road; the wireless control subnode is connected on the traffic reminding equipment arranged at two sides of the road; the wireless transceiving converging node is connected with a remote control computer; the traffic reminding subsystem comprises a control circuit based on a finite state automat, a speed limitation board and a tweeter; the control circuit receives command from the wireless control subnode to control the speed limitation board and the tweeter. In the invention, wireless sensor network is adopted to mainly complete automatic monitoring control reminding to vechile traffic at slope turn.

The invention relates to the field of urban comprehensive pipe galleries, and provides a comprehensive pipe gallery management system. The comprehensive pipe gallery management system is constructed by combining a management platform with field layer subsystems, that is, the comprehensive pipe gallery management system adopts the combination of software and hardware. The field layer subsystems (hardware portion) are used for acquiring and transmitting pipe gallery information of different types; the management platform (software portion) is used for receiving the pipe gallery information, processing the pipe gallery information, and feeding back processing results to the corresponding field layer subsystems; and the field layer subsystems perform corresponding operations according to the processing results of the management platform. The comprehensive pipe gallery management system can realize acquisition of various kinds of pipe gallery information, has rich functions, is high in working efficiency through the real-time communication between the management platform and the field layer subsystems, has emergency processing capability, and realizes unified management and control by means of the management platform, so that the operation and maintenance management of the system is simple, and the comprehensive pipe gallery management system is easy to operate.

The invention relates to a LCD, comprising a first base plate and a second base plate, a liquid crystal layer set between the first base plate and the second base plate, plural frame-glue observing windows set on the second base plate, which are the closed pattern of smooth curve, and frame glue covering partial frame-glue observing windows and round the liquid crystal layer and bonding the first base plate and the second base plate. The frame-glue observing windows of invention can avoid uneven gap and increase convenience for coating state of observing frame glue.

The invention discloses a composite material ultrasonic guided wave structure health monitoring method in a variable temperature environment. The method comprises the steps: constructing a reference coefficient set of a structure health monitoring network through calculating a difference index between reference signals in a reference signal set; and performing reference screening and calculating adamage index according to the temperature information of the signals acquired in real time, solving a damage proportionality coefficient under each propagation path in combination with the referencecoefficient, importing the damage proportionality coefficient into a detection network to perform actual damage path screening, and finally outputting the position of the damage in combination with adamage positioning imaging algorithm. The composite material ultrasonic monitoring method provided by the invention can effectively remove the influence of the anisotropism of the composite material on ultrasonic propagation, can effectively eliminate the interference of environmental factors on ultrasonic signals, and can quickly realize the accurate positioning of damage.

The invention relates to a monitoring mechanism and particularly relates to a six-degree-of-freedom monitoring mechanism. The invention solves the technical problem of providing the six-degree-of-freedom monitoring mechanism which is large in monitoring angle, can reduce the monitoring blind points and is clear in monitoring video. In order to solve the technical problem, the invention provides the six-degree-of-freedom monitoring mechanism. The six-degree-of-freedom monitoring mechanism comprises a bottom plate, a first motor, a first bevel gear, a bearing pedestal, a second bevel gear, a rotary shaft, a first bracket, a second bracket, a second motor, a disc, a first connecting rod, a second connecting rod, a sliding sleeve, a rack, a guide rod, a first gear, a supporting rod, an arc-shaped block, a sliding shaft, a fixed rod, a first swinging rod, a camera, a reel, a first pull rope and a first elastic element. The first motor and the bearing pedestal are arranged on the top of the bottom plate. The six-degree-of-freedom monitoring mechanism provided by the invention achieves the effects that the monitoring angle is large, the monitoring blind points can be reduced and the monitoring videos are clear, and the monitoring mechanism can be remotely controlled to be switched on and off.

The embodiment of the invention discloses a camera control method and device and a storage medium. The method comprises the steps that first monitoring information is acquired; performing informationprocessing on the first monitoring information to obtain an information processing result; determining at least one target shooting area according to the information processing result, turning on at least one camera corresponding to the at least one target shooting area in the more than two cameras to perform video monitoring; thus, under the condition that more than two cameras are arranged outside the door, the cameras can be taken out. According to the invention, the at least one target shooting area is determined according to the first monitoring information outside the door, and then theat least one corresponding camera is started for shooting, so that the situation outside the door can be effectively monitored, the monitoring blind area is reduced, the situation that all the camerasare started at the same time can be reduced, and the energy consumption is reduced.

The invention discloses an unregistered unmanned aerial vehicle detection system based on radio frequency detection. Radio frequency signals emitted by an unmanned aerial vehicle are simultaneously received through two antennas, so that the unregistered unmanned aerial vehicle in a no-fly zone can be monitored in real time; a control signal is sent to a course steering engine and a pitching steering engine, so that the course steering engine and the pitching steering engine are driven to accurately rotate to specific positions; the course steering engine and the pitching steering engine are inmechanical linkage through a steering wheel. The course steering engine and the pitching steering engine can control the antenna to rotate horizontally and vertically respectively, the characteristics of a steering engine and a directional antenna are combined, the rotating positions of the course steering engine and the pitching steering engine are measured, the unregistered unmanned aerial vehicle can be positioned and tracked in an omnibearing mode, monitoring blind areas are reduced, and the detection effect is better.

The invention relates to a power transmission line infrared thermal imaging forest fire prevention system. The system comprises a micro-meteorological monitoring device, a binocular thermal imaging holder instrument, a forest fire prevention control device, a solar power supply device, a first supporting frame and a second supporting frame, the forest fire prevention control device comprises a main machine box body, a main control board, a power supply management chip and a wireless router, the main control board is connected with the micro-meteorological monitoring device, an infrared thermalimaging and visible light binocular camera, a solar tracking sensor, a holder, the power supply management chip and the wireless router, wherein the solar power supply device comprises a solar cell panel, a storage battery box body and a storage battery pack, the solar cell panel is erected above the storage battery box body and is connected with the storage battery pack, and the storage batterypack is connected with the power supply management chip. Compared with the prior art, the system has the advantages of being high in reliability, wide in coverage range, low in cost, convenient to install and maintain, is particularly suitable for preventing forest fire monitoring of the overhead cable channel, and can achieve fire point ranging.

The invention relates to the technical field of shooting control, in particular to an indoor multi-angle shooting control system in the technical field of information. The indoor multi-angle shootingcontrol system comprises a mounting box, wherein a mounting plate is arranged at the lower end of the mounting box, a control module is arranged at the upper end of the inner cavity of the mounting box, a wireless module is arranged on the left side of the inner cavity of the mounting box, a first positive and negative motor is arranged at the upper end of the inner cavity of the mounting box, theouter side of the output shaft of the first positive and negative motor is connected with a first bevel gear, the outer side of the first bevel gear is meshed with a second bevel gear, an inner cavity of the second bevel gear is connected with a first supporting pipe, and the lower end of the first supporting pipe penetrates through the mounting plate and is connected with a first fixing plate. According to the indoor multi-angle shooting control system, the structure design is reasonable, the shooting can be conveniently adjusted in multiple directions, the distance is adjusted, the angle isadjusted, the shooting area can be effectively improved, the monitoring blind area can be effectively reduced, and the practicability of the shooting control system can be effectively improved.

The invention relates to an alarming system used for monitoring a plant inclination state. The alarming system comprises an inclination detection device, a monitoring platform, and a shooting device. The inclination detection device comprises an MEMS gyroscope, a main controller, a power supply module, and a wireless communication module. The MEMS gyroscope is connected with the input end of the main controller, and the wireless communication module is connected with the output end of the main controller. The wireless communication module is used for establishing communication connection with the shooting device or the monitoring platform. By evaluating an inclination damage state, the shooting device is activated automatically to capture on-site pictures, and the wireless communication module is used to transmit early warning information to the monitoring platform, and then monitoring blind areas and manual patrol are reduced, and manpower and material resources are saved, and then the plant inclination state is timely monitored, and alarms are given timely. Under severe weather conditions, the alarming system is used for monitoring of abnormal states and fault elimination, and then identification of sources of alarming abnormal data is facilitated, and plant monitoring management level is improved.

The invention is applicable to the technical field of big data application, and provides an electricity stealing behavior judgment method and a terminal device. The method comprises the steps of determining the theoretical electricity consumption and the actual electricity consumption of a user according to the data, collected by an electricity consumption information collection system one day before the electricity stealing behavior judgment, of the target user at a preset collection point; according to the theoretical electricity consumption and the actual electricity consumption, judging whether the user has a first-level electricity stealing risk or not; if yes, judging whether the user has a voltage and current abnormal event or not on the current day through the electricity stealingbehavior; if yes, judging that the user has a second-level electricity stealing risk. According to the present invention, the related personnel can position the electricity stealing behavior of the user according to the judgment result, the monitoring blind area of an acquisition system is greatly reduced, the economic loss of a power supply company is reduced, and the electricity stealing risk classification is helpful for the working personnel to preferentially arrange analysis and troubleshooting work according to the event level, and is suitable for practical application.

The invention provides a crash log processing method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining addresses of all classes in an executable file corresponding to a crash log file; obtaining an address range of each function of each class according to the address of each class; and for any crash log in the crash log file, in response to the situation that the crash address corresponding to the crash log is located in the address range of any function, determining that the function crashes; and searching a function address interval to which the crash address belongs by scanning the feasibility file and comparing the assembly instruction, and confirming the crash function, thereby converting the crash address into a function symbol and symbolizing the log. The method has the beneficial effects that the crash log can still be symbolized under the condition that the symbol table is missing, the blind area of program monitoring is reduced, and the feasibility and adaptability of crash log symbolization are improved.

The invention provides an automatically adjustable coal mine security monitoring support device. The automatically adjustable coal mine security monitoring support device comprises a mounting base, groove holes and a worm; four groups of groove holes are uniformly formed in the right end surface of the mounting base; a group of first-stage steering knuckles are hinged to the left side of the mounting base; a group of first-stage steering motors are fixedly connected to the inner sides of the first-stage steering knuckles; a group of first-stage steering gears are fixedly connected to the tops of the first-stage steering motors; a group of lifting upper connecting rods are hinged to the upper parts of the left end surfaces of the first-stage steering knuckles; and a group of second-stage fixed gears are fixedly connected to the upper end surfaces of the interiors of the left sides of second-stage steering knuckles. According to the automatically adjustable coal mine security monitoring support device, up-down movement and left-right swinging rotation of monitoring equipment are realized by using various steering structures, so that the device can easily bypass a barrier or a wall corner to realize all-around monitoring, the monitoring range is increased, and the monitoring blind area is reduced.

The invention discloses a centralized water gate group monitoring device, and relates to the technical field of water gate management. The centralized water gate group monitoring device comprises a water gate main body, water level ascending speed monitoring mechanisms and a self-cleaning mechanism; a control box is arranged at the upper end of the water gate main body; a first rotating shaft is placed at the upper end of the control box; a support pipe is embedded in the upper end of the first rotating shaft; the front surface of the support pipe is connected with a video monitoring mechanism; a support frame is mounted at the upper end of the support pipe; second rotating shafts are fixed at the upper ends of the two sides in the support frame; winding drums are arranged at the ends, near the center line of the support frame, of the second rotating shafts; steel chains are placed on the front surfaces of the winding drums; and the water level ascending speed monitoring mechanisms are embedded in the two sides of the front surface of the water gate main body. In the centralized water gate group monitoring device, the support pipe can be rotated along the first rotating shaft to drive a monitoring probe at the upper end thereof to horizontally rotate, so that the wide-range monitoring of the surroundings of water gates can be achieved, the monitoring range of the water gates is widened, and monitoring blind areas are reduced.

The invention discloses an active and passive combined security enclosure alarm system, and particularly relates to the field of airport security equipment, which comprises an airport enclosure security early warning system, an early warning linkage system and an early warning auxiliary system, wherein the airport enclosure security early warning system comprises a distributed optical fiber sensing early warning system used for detecting people, vehicles and other objects appearing in a predetermined area, and an intelligent AI monitoring system used for distinguishing people, vehicles, animals and other objects appearing in the predetermined area. The early warning linkage system comprises a digital broadcast used for transmitting instructions and a sound-light alarm used for reminding, and the early warning auxiliary system comprises a communication project used for completing global communication and a power supply system used for supplying power to the whole electric equipment. The system is wide in frequency response range, wherein the frequency response range can cover all frequency spectrums of the whole intrusion activity without missing report; and the system is good in degree of linearity, has good performance consistency on the whole perimeter fence, and the far-end performance is not attenuated.

The embodiment of the invention provides a region monitoring method and device, and the method comprises the steps: obtaining map data for an electronic purse seine region, and displaying the map datain an interactive interface; in response to the first interaction operation, determining a first monitoring point and a second monitoring point in the map data; determining a target region accordingto the first monitoring point and the second monitoring point; determining a plurality of monitoring devices associated with the target region; determining a target monitoring device set from the plurality of monitoring devices; and establishing an association relationship between the target monitoring device set and the target region so as to call the target monitoring device to monitor the target region. Through the embodiment of the invention, the monitoring blind region of the target region to be monitored is reduced, and the safety of the target region is improved.

The invention relates to the technical field of water quality monitoring, and discloses a full-automatic submersible type long-term water sample collector. The collector comprises a shell, a detectionmechanism coaxial with the shell, a buoyancy device arranged on the detection mechanism in a sleeving mode, and an anti-disengaging device arranged on the shell. The appearance of the shell is of a conical structure, a water outlet is formed in one end of the small head, a water inlet is formed in one end of the large head, sand prevention nets are arranged on the water outlet and the water inletrespectively, the detection mechanism and the shell are fixed through a plurality of mounting rings, and a communication module is further arranged in the detection mechanism. Compared with the priorart, the collector has the following advantages and effects that the device is durable in structure, easy to replace and suitable for long-term underwater water sample collection, and solves the problems that a sampling ship is large in water surface fixing resistance, high in fixing difficulty and prone to winding of a large number of aquatic plants and sundries; and meanwhile the structure is firm and convenient to install.

The invention belongs to the technical field of monitoring systems, in particular to an airport runway monitoring system. The airport runway monitoring system comprises a fixed seat, a signal input module, a voice module, a control unit, a power supply module, and an alarm module. The signal input module, the voice module, the power supply module, and the alarm module are all connected to the control unit; the top of the fixed seat is provided with a sliding slot; a support column is slidably mounted in the sliding slot, and the top of the support column extends outside the sliding slot; a first rotating shaft slot is arranged in the inner wall of the sliding slot near the support column, and a second rotating shaft slot is arranged in an inner wall of the sliding slot away from the support column; the first rotating shaft slot and the second rotating shaft slot are rotatably installed with a same first rotating shaft; and a gear groove is arranged on the top of the fixed seat. The airport runway monitoring system is scientifically designed, and is convenient to use, and the camera is easy to move and rotate. The airport runway monitoring system can effectively reduce the cost of installing a monitoring system, while avoiding the risk of monitor damage, reducing the monitoring blind zone and ensuring the normal take-off and landing of the aircrafts.

The adjustable unmanned aerial vehicle capable of loading, transporting and fixing the aerial camera in multiple directions comprises a machine shell, an inner rod, a clamping block, a sliding block,a gear ring, a lantern ring, an aerial camera body and a rotating disc; a connecting arm is fixedly installed on the side wall of the machine shell, and a paddle assembly is fixedly connected to the end of the connecting arm; supporting legs are fixedly installed on the edge of the bottom face of the machine shell, a connecting block is fixedly connected to the upper portion of the side wall of the machine shell, a guide plate and a sliding block are movably installed on the inner wall of the connecting block, the sliding block is fixedly connected with the outer wall of the guide plate, and agear ring is fixedly connected to the outer wall of the guide plate. The adjustable unmanned aerial vehicle capable of loading, transporting and fixing the aerial camera in multiple directions is provided with the aerial camera capable of being rotated and adjusted in a large-range and multi-angle mode, the position of the aerial camera can be automatically adjusted according to instructions of operators, therefore, monitoring blind areas are effectively reduced, and meanwhile the aerial camera can be rapidly assembled and disassembled through the adjustable unmanned aerial vehicle.

The invention discloses a construction site danger protection area monitoring and safety alarm system and a use method thereof. The system comprises a danger source signal coverage device which is used for transmitting a danger signal to define a danger protection area covering a danger source; a personnel positioning and alarming device used for real-time positioning, wherein when the construction operation personnel wearing the personnel positioning and alarming device enter a dangerous protection area, the personnel positioning and alarming device can receive the dangerous signal and send out an alarming signal; a server used for collecting data information of the danger source signal coverage device and the personnel positioning and alarming device; and a monitor, wherein GIS graphs are established or stored on the server or the monitor, data information collected by the server is loaded to the GIS graphs for visual monitoring, analysis and processing, and when construction workers enter a danger protection area, safety alarm reminding is sent out on the GIS graphs. According to the invention, visual monitoring, analysis and processing can be carried out on the danger protection area of the construction site so as to carry out intelligent monitoring.

The invention discloses a geotechnical engineering safety monitoring system. The geotechnical engineering safety monitoring system comprises a data collection apparatus, a base station device and a safety monitoring center; and the data collection apparatus comprises a plurality of sensor nodes connected by a wireless sensor network, each sensor node is used for collecting geotechnical safety monitoring data and sending the same to the base station device, and the base station device aggregates the safety monitoring data sent by the sensor nodes and transmits the safety monitoring data to thesafety monitoring center. The geotechnical engineering safety monitoring system disclosed by the invention realizes the real-time collection, instant collection and instant utilization functions of the safety monitoring data, and solves the problems brought by onsite sensor installation and embedding and signal cable layout. According to the geotechnical engineering safety monitoring system disclosed by the invention, a plurality of sensors can be densely deployed according to the size of a safety monitoring project area without considering the cable deployment congestion degree, so that the monitoring dead zones are reduced; and a large amount of data are collected and processed through the wireless sensor network, thereby improving the monitoring accuracy.

The invention discloses a primary-secondary type gas sensor, comprising a plurality of secondary machine gas sensors and a primary machine gas sensor. The secondary machine gas sensors are used for detecting gas concentration of secondary machines; the primary machine gas sensor is used for detecting gas concentration of a primary machine and uploads a gas concentration signal to a monitoring sub station by a connecting line and receives a gas concentration signal downloaded from the monitoring sub station, wherein, the plurality of the secondary machine gas sensors communicate with the primary machine gas sensor in a wireless way; the gas concentration signal detected by the secondary machine gas sensors is transmitted to the primary machine gas sensors in a wireless way, and then is uploaded to the monitoring sub station by the primary machine gas sensor through a signaling line. In the invention, multi-point simultaneous and continuous monitoring can be carried out in a certain space range, and real-time transmission can be realized.

The invention provides a novel medicament flow measuring device which is divided into four modules, namely a medicament metering assembly, an energy transmission assembly, a generator set and a light-emitting and sound-producing device group, the medicament metering assembly comprises a medicament metering barrel and a weight, and the outer wall, 5cm away from the mouth of the metering barrel, of the medicament metering barrel is connected with a transmission rod live shaft; a rotating shaft is arranged at a position 5cm away from the bottom of the metering barrel and is connected to a metal fixing rod; the energy transmission assembly comprises a transmission rod, a crank handle, a transmission gear and a metal wheel disc; the generator set comprises a motor generator, a matched transmission gear, a metal conductor wire and a screw, the position of the transmission gear is adjusted, the motor generator is fixed on the support, and the metal conductor wire is led out of a current output end and is fixed through the screw after extending to the fixing plate; and the light-emitting and sound-producing device group comprises an LED lamp, a sound generator and a metal conductive wire. The device is convenient to check the dosage, energy-saving, environment-friendly, and convenient and flexible in adjustment process.

The invention discloses a motor vehicle illegal behavior automatic snapshot processing method and system, and relates to the field of road traffic monitoring, and the method comprises the steps: collecting vehicle surrounding information based on a sensor installed on a vehicle, and recognizing the vehicle surrounding information through an image recognition algorithm to obtain vehicles with bad driving behaviors around the vehicle; and uploading driving behavior information of the vehicle with the bad driving behavior to a cloud server, wherein the driving behavior information comprises vehicle information, a bad driving behavior image and a bad driving behavior type, based on the driving behavior information, the cloud server checks and records the bad driving behavior of the vehicle with the bad driving behavior, and based on the multicast mode, the cloud server carries out safety reminding on the vehicle with the bad driving behavior and the surrounding vehicles of the vehicle with the bad driving behavior. According to the invention, the monitoring blind area can be effectively reduced, and the timeliness of snapshot and illegal determination is ensured.

The embodiment of the invention provides a monitoring image processing method and device, a monitoring system and a storage medium, relates to the technical field of image processing, and the method, the device and the system can reduce a monitoring blind area in a long, narrow and deep monitoring scene. The monitoring image processing method comprises the steps that a first image sent by a camera is received, the aspect ratio of the first image is a / b, the first image is subjected to 90-degree rotation operation to form a rotated second image, the aspect ratio of the second image is b / a, a display picture is generated, the display picture comprises the second image, the aspect ratio of the second image in the display picture is b / a. The technical scheme is mainly used for an image monitoring process.

The invention provides a precision compressor for purification production and processing of an ultra-pure element via an adsorption method. The precision compressor comprises a box body, wherein a purification mechanism and a backflow mechanism are arranged in the box body, a purification cylinder of the purification mechanism is arranged in the box body, a purity monitoring instrument of the backflow mechanism is arranged in the purification cylinder, the number of backflow pipes is two, each backflow pipe is provided with a one-way valve, and the other ends of the two backflow pipes separately communicate with a control box. According to the invention, the backflow mechanism is arranged in the box body, and the purity monitoring instrument is arranged in the backflow mechanism; when a small amount of gas which is not completely purified flows out of an adsorption box, the purity monitoring instrument controls an electromagnetic valve to be closed, the one-way valves on the backflow pipes are opened at the same time, and gas which does not reach the standard enters the control box from the backflow pipes and is subjected to adsorption and impurity removal again until the gas completely reaches the standard; and thus, the situation that a small amount of gas is blended into a collecting device is avoided, so purification accuracy is ensured, and experiment effect is ensured.

The invention discloses a solar road monitor capable of preventing mirror surface blurring, which comprises a main body, an annular cavity opening to the outside is arranged in the main body, an annular glass is fixed between the upper and lower walls of the annular cavity, and the A support block is slidably provided on the top wall of the annular cavity, a support plate is slidably provided on the bottom wall of the annular cavity, the support block is located inside the annular glass, and the support plate is located outside the support block. The front side of the support block is rotated to be equipped with a camera that can be used for camera monitoring. The invention can effectively strengthen the ability of the road monitor to prevent rain, fog and dust, keep the monitor in a clear recording state at any time, and greatly increase the It can monitor the angle and range, reduce the dead angle of monitoring, and also use the solar system, so that the monitor can be installed in places without power facilities.

The invention relates to the technical field of the geographic information and space optimization, and especially relates an urban video monitoring space optimization method based on sign-in POI. Theurban video monitoring space optimization method based on sign-in POI comprises the following steps: selecting a point with the maximum monitored probability in all units in a monitoring region as a candidate point; computing a camera field of vision at the candidate point by applying the user sign-in POI data in the monitoring region; removing a unit covered by the camera field of vision at the candidate point, and selecting the point with the maximum monitored probability in the rest units; judging whether all units in the monitoring region are completely covered; and performing the video monitoring optimization by combining with a maximum coverage optimization model. Through the optimization method disclosed by the invention, the scientificity of the video monitoring deployment is improved, the monitoring coverage overlapping rate is lowered, and the monitoring dead zone is reduced.

The invention discloses an optical-fiber piezometric catheter for detecting a digestive tract as well as a preparation method and application. The optical-fiber piezometric catheter mainly comprises a sensing optical fiber, a protective sleeve, a polymer encapsulating layer and a medical catheter, wherein the sensing optical fiber contains a sensing area and a non-sensing area; the polymer encapsulating layer encapsulates the sensing area of the sensing optical fiber; the protective sleeve encapsulates the non-sensing area of the sensing optical fiber; the medical catheter encapsulates the part, needing to enter a human body and encapsulated by the polymer encapsulating layer and the protective layer, of the sensing optical fiber. Micro-structural sensing units which are arranged repeatedly are engraved in the sensing area of the sensing optical fiber. The micro-structural sensing units contain the information of spectral central reflection wavelengths and repetition frequency information, realizes wavelength-division and frequency-division dual coding, improves multiplexing capacity, and realizes detecting the pressure of different positions of the digestive tract through a wavelength-division and frequency-division dual coding demodulation technique. The optical-fiber piezometric catheter for detecting the digestive tract has the advantages of long measurement length, high resolution and sensitivity, low manufacturing cost and better comfort.