362 results about "Film pressure" patented technology

The invention provides a device that measures a patient's blood pressure without using an inflatable cuff. The device includes an optical module featuring an optical source and an optical detector; a flexible, thin-film pressure sensor; and a processing module, configured to receive and process information to calculate time-dependent blood pressure data and send the data to a web site using wireless data transmission techniques.

The invention discloses a water lubricated bearing and transmission system comprehensive performance testing platform, which comprises a water lubricated bearing, a dynamic seal device, an elastic coupling, a gearbox, a water circulating system, a driving motor, an intermediate bearing, a bearing block, a loading and testing device and other parts. The loading device loads a test shaft in the circumferential direction, axial direction and radial direction so as to simulate complicated working conditions of the water lubricated bearing and the transmission system thereof; the testing system can detect various parameters of the water lubricated bearing, such as working speed, torque, temperature, frictional characteristics, water film pressure distribution, interface deformation distribution, shaft centerline orbit, noise and dynamic characteristics, and comprehensive performance of the dynamic seal, the elastic coupling and the transmission system on line; and the testing platform can be applied to research of scientific problems such as the loading bearing of a water lubricated friction pair, failure mechanism and evolution law, tribological performance and dynamic service behaviors, and provides a key scientific and technological basis for developing a pollution-free, low-noise, high-reliability, long-life, high-efficiency and energy-saving water lubricated bearing and a transmission system thereof.

A film pressure sensitive resistor comprises conductive particles such as carbon black, a binder such as polyester resin, and spherical elastic particles having an average particle diameter of 2 mum to 50 mum, and further has average surface roughness of 0.1 mum to 3 mum, a peak-to-peak concavo-convex period of 10 mum to 1000 mum, and an elastic modulus of 800 MPa to 8000 MPa so as to have reliable quality, and excellent environmental resistance, and durability to repeated use (depressing).

The invention, which belongs to the technical field of pressure sensor preparation, discloses a preparation method of a flexible film pressure sensor. The method comprises: step one, forming an electrode layer on a flexible substrate; step two, adding an organic solvent into a conductive filler, carrying out fixing uniformly to obtain a mixed solution A, adding a polymer matrix material and a modifier into the mixed solution A, and carrying out fixing uniformly to obtain a slurry; step three, carrying out stirring and coating the flexible substrate with the electrode layer with the obtained composite slurry by means of silk-screen printing to obtain a sensitive layer having a surface microstructure; and step four, placing the two flexible structures with the sensitive layers and the electrode layers in opposite and carrying out packaging to obtain a flexible film pressure sensor. According to the invention, the prepared flexible film pressure sensor has advantages of high sensitivity being less than 5kPa<-1>, wide measuring range of from 50Pa to 1.5MPa, and short response time from 5 to 30ms and has the broad application prospects in fields of electronic skin, human body biologicalsignal detection and vibration signal detection.

The invention relates to a performance testing device of a static-pressure air bearing, which at least comprises a base (1), a film pressure sensor (2), a pressure regulating valve (3), an air intake tube (4), an air pressure gauge (5), a static-pressure air bearing (6) to be tested, a press plate (7), a bearing fixing component (8), a bearing connecting component (9), a linear driver connecting component (10), a limit bolt (11), a linear driver (12), a rack (13), a bracket (14), a force sensor (15), a displacement sensor (16), a driven gear (17), a driving gear (18), a driving motor (19) and a rotating encoder (20). The invention can test the bearing capacity and rigidity of the static-pressure air bearing under different air supply pressures and different air film thicknesses and the air pressure change in the bearing, thereby facilitating the performance testing of the static-pressure air bearing and the optimization of structural parameters of the bearing.

The invention relates to an integrated temperature thin film pressure sensor, which consists of a suction pressure connecting pipe with threads and a seal ring, a sensitive component, an external circuit board, a shell and a socket connector. A sensitive elastomer is provided with a transition layer, an insulating layer, resistive layers (including a strain resistive layer and a temperature sensitive resistive layer), a welding layer and a passivation protective layer, wherein the resistive layers are connected with the external circuit board through conducting wires. The insulating layer of the sensor is formed by superimposing SiO2 and Ta2O5 or superimposing the SiO2 and Al2O3, the strain resistive layer is formed by photoetching a NiCr alloy layer, the temperature sensitive layer is formed by photoetching Ni metal, and the temperature sensitive layer not only can solve the problem of actual temperature measurement, but also can compensate the temperature sensitivity more precisely so that the pressure measurement is more accurate. The integrated temperature thin film pressure sensor adopts an ion beam sputtering process, thus the long-term stability of the sensor is good, the temperature zero drift is minimum and the comprehensive precision is high.

The invention discloses a pneumatic soft finger with tactile force and a shape perception function. The upper portion of the pneumatic soft finger is an actuator, the lower portion of the pneumatic soft finger comprises a silicon substrate layer, a tactile force perception layer, a shape perception layer and an inextensible layer which are arranged sequentially from bottom to top, wherein the tactile force perception layer is internally provided with multiple film pressure sensors adhered to the top face of the silicon substrate layer and distributed in an array, the shape perception layer isinternally and horizontally provided with a slice-type bending sensor adhered to the top face of the tactile force perception layer in the length direction of the finger, the upper portion of the pneumatic soft finger is formed by one-time pouring with a mold, and the lower portion of the pneumatic soft finger is manufactured by layered pouring with the mold. The pneumatic soft finger with the tactile force and the shape perception function has the advantages that the distribution and size of the tactile force and deformation of the soft finger can be measured when the soft finger is in contact with an object, the pneumatic soft finger is used for object identification, sliding detection and the like, thereby achieving that the object is grabbed and operated more reliably.

A plantar pressure distribution signal acquisition system comprises a sensing unit and a control unit. The sensing unit is fixed with feet by a locating foot packing sheet and is a film pressure sensing measurer comprising an upper sheet and a lower sheet; parallel copper claddings are distributed on one of the faces of the upper sheet and the lower sheet at intervals; conductive rubbers are distributed on the copper claddings at intervals, and the conductive rubbers on the upper sheet and the lower sheet are contacted with one another to form sending dots. The control unit is a main control chip; one signal input terminal of the main control chip is connected with two signal output terminals and enabling terminals of a multiplexer of the upper sheet, and the other signal input terminal of the main control chip is connected with two signal output terminals and enabling terminals of a multiplexer of the lower sheet. The system is a large-area pressure distribution measuring device by taking the conductive rubber as a sensing element, and has the advantages of high reliability and precision and low cost, can dynamically measure pressure distribution of a plane and a curved surface in a large-area range in real time, and is suitable for measuring the pressure distribution of vola, buttocks and the like.

This invention disclosed a low-temperature film pressure sensor which consists of take-over neb, film slice, film, transfer seat, hull and jack. The film contains transition layer, insulation layer, resistance layer, compensate resistance layer and weld layer. The manufacture technique was as follows: choose a film, set transition layer, insulation layer, resistance layer, compensate resistance layer and weld layer on this film, photoengrave to obtain weld plate, temperature compensate resistance, zero temperature compensate resistance, strain rosette and zero compensate resistance, modify the value in the above resistance using laser modifying method, assemble the sensor. This invention shows high efficiency and precision.

The invention provides a polysilicon nanometer film pressure sensor with a temperature sensor and a manufacture method thereof, wherein the pressure sensor guarantees high sensitivity, obtains low-temperature coefficient, and realizes pressure and temperature measurement. The pressure sensor consists of a monocrystal silicon cup, an insulating layer, a polysilicon nanometer film pressure sensitiveresistor and a film resistor. The monocrystal silicon cup is connected with the insulating layer, and the insulating layer is connected with the polysilicon nanometer film pressure sensitive resistorand the film resistor. The monocrystal silicon cup comprises a pressure film and a peripheral fixed structure, the pressure film is positioned above the monocrystal silicon cup, and the peripheral fixed structure is positioned at the two edges of the monocrystal silicon cup. The monocrystal silicon cup is manufactured by corroding the single crystal silicon, one layer of silicon dioxide or silicon nitride is deposited above the monocrystal silicon cup to be as the insulating layer by means of chemical vapor deposition, and a pressure measuring unit and a temperature measuring unit are intergraded on a chip, so as to be capable of measuring the pressure and the temperature, reduce the area of the chip, and reduce the cost.

The invention discloses a casting polypropylene protection film pressure-sensitive adhesive and a casting polypropylene protection film with the pressure-sensitive adhesive. The casting polypropylene protection film pressure-sensitive adhesive comprises, by weight, 34.7-39.9% of a polymerization monomer, 0.1-0.3% of an initiator and 60.0-65.0% of a solvent, wherein the polymerization monomer comprises, by weight, 55.0-80.0% of an acrylate soft monomer, 10.0-30.0% of an acrylate hard monomer, 5.0-15.0% of a crosslinking monomer, 0.4-1.0% of an organosilicone monomer and 0.2-0.8% of an adhesion monomer. The casting polypropylene protection film pressure-sensitive adhesive has high adhesion and good temperature resistance and can resist the highest temperature of 180 DEG C.

The invention discloses an active driving ankle foot orthosis with a plantar pressure detection function. The active driving ankle foot orthosis comprises a shank fixing component, a foot sensing component and an active driving component. The active driving component drives a driving bevel gear through a direct current motor; the driving bevel gear is meshed with a driven bevel gear; the driven bevel gear is mounted on a transmission shaft; a synchronous pulley, a synchronous belt and a tensioning screw are respectively formed at two ends of the transmission shaft. Seven film pressure sensors and an accelerometer are arranged in the foot sensing component. The active driving ankle foot orthosis has the advantages that on one hand, an intelligent pressure sensing foot is designed according to body bionics, a sensing heel and a sole are mutually connected through a spring steel sheet, the segmented structure of a human foot is simulated, and toes and the sole can be freely bent during walking, and on the other hand, active driving free degree is designed on the sagittal plane of an ankle joint, foot drop of a patient is prevented, meanwhile, power for the patient to go ahead is effectively provided through the driving of the direct current motor, and the walking load of the patient is reduced.

The invention discloses a method for testing the mechanical property of a superhard diamond film. The testing method comprises the following steps of: measuring a hardness and an elastic modulus of the diamond film by a micron indentation method; continuously applying a load in the range of a plurality of N to thousands of N to the diamond film by an automatic loading mechanism; applying the continuous load to the surface of the diamond film by an artificial diamond indenter and controlling the indentation depth in the range of one tenth to one fifteenth of the film thickness; processing by adisplacement sensor and a computer to obtain a load-depth curve of a material; obtaining a load-depth curve in the unloading process according to a preset unloading rate; and calculating two groups of data to obtain the elastic modulus and the hardness of the material. In the invention, the hardness and the elastic modulus of the diamond film are measured by the micron indentation method; and thecheap diamond pressure head is utilized to replace an expansion diamond film pressure needle, so that the experiment cost is reduced, the experiment error is reduced, and the measurement requirementson the hardness, the elastic modulus and the film-substrate cohesion of the diamond film can be met.

The invention discloses a loading type control system of a lower limb exoskeleton robot. The control system is composed of two identical subsystems. Each subsystem is composed of a signal acquisition device, a microcontroller, a motion actuator and a control algorithm. The lower limb exoskeleton robot is used for providing assistance for the lower limbs of wearers. Each signal acquisition device is composed of a film pressure sensor, a magnetic angle sensor, a multichannel amplifier and a multichannel low-pass filter and can acquire plantar pressure signals of the wearers and ankle angle signals of the lower limb exoskeleton robot. Each motion actuator is composed of a servo driver set and a servo electric cylinder set. The tail end following control algorithm is adopted as the control algorithm. The control system has the advantages of being simple in structure, easy to wear and low in cost.

The invention relates to a method for producing a reflective film with a microprism array structure. The invention overcomes the defects of poor hardness, scratch resistance, thermal resistance and solvent resistance of a microprism, poor product consistency, low production speed, low working efficiency and the like existing in the prior art. The invention adopts an endless belt-shaped mould of which a protruded continuous precise microprism array structure is arranged on the outer surface and comprises the following production steps that: a resin film is coated with photosensitive resin and then subjected to drying, heated film pressure and quickly solidification by UV light irradiation, so that the resin film coated with the photosensitive resin and the microprism structure on the photosensitive resin layer jointly form a laminated film, and the laminated film is cooled to obtain the reflective film with the microprism array structure. The method has the advantages of simple and convenient operation, high production speed and high working efficiency; and the formed microprism has the advantages of better hardness, scratch resistance, thermal resistance and solvent resistance, and good product consistency.

The invention belongs to the technical field of organosilicone pressure sensitive materials, and discloses a high stripping force PET (polyethylene terephthalate) protective film pressure sensitive adhesive and a preparation method thereof. The high stripping force PET (polyethylene terephthalate) protective film pressure sensitive adhesive is composed of the folhighing components in parts by weight: 10-30 parts of base gum; 30-50 parts of modified MQ resin; 40 parts of an organic solvent, 1-3 parts of hydrogen-containing silicone oil; 0.1-0.3 part of an inhibitor and 3-4.5 parts of a catalyst; the preparation method comprises the following steps: (1) mixing the base gum, the organic solvent and the modified MQ resin, and adding the catalyst, mixing and stirring evenly; (2) then adding the inhibitor, mixing and stirring evenly; and (3) adding the hydrogen-containing silicone oil, mixing and stirring evenly to obtain the high stripping force PET protective film pressure sensitive adhesive. The high stripping force PET protective film pressure sensitive adhesive has excellent primary viscidity and lasting viscidity, also has high stripping force, and has high economic value.

The invention provides a method for making a flexible transparent conductive carbon nanotube (CNT) film and the CNT film prepared by the method. The invention also relates to a method for treating the CNT film by using thionyl bromide (SOBr2) as a dopant, a CNT film pressure body provided with a sandwich structure, a flexible transparent anode comprising the CNT film pressure body, and an organic light-emitting diode (LED) comprising the anode. Compared with the prior impregnation method, the method can quickly and radically remove a film filter, but does not damage the obtained CNT, so that the obtained CNT film can be more widely applied to electroluminescent devices or photovoltaic devices.

The invention discloses a reverse osmosis seawater desalination system using a self-pressurization energy recycling high-pressure pump. The process of the reverse osmosis seawater desalination system using the self-pressurization energy recycling high-pressure pump comprises the following steps: pumping seawater by using a raw water pump, performing pretreatment, directly feeding into the self-pressurization energy recycling high-pressure pump for pressurization, feeding the high-pressure raw material which meets the reverse osmosis pressure requirements into a reverse osmosis film pressure container, desalinating the seawater by using a reverse osmosis film, using the desalinated fresh water as water produced from a small-size seawater desalination system, feeding thick salt water discharged from the reverse osmosis film pressure container into the high-pressure thick water inlet of the self-pressurization energy recycling high-pressure pump for recycling residual pressure, and discharging the low-pressure thick salt water after the residual pressure is recycled from the low-pressure thick water outlet of the self-pressurization energy recycling high-pressure pump. The effective energy conversion efficiency in residual pressure utilization can be greater than 90%.

The invention discloses a thin film pressure transducer and a manufacturing method thereof. The thin film pressure transducer comprises a pedestal and a sensitive core body. A pressure guiding hole is arranged in the pedestal. A buffer assembly used for transmitting a medium pressure and obstructing transmission of medium temperatures is also arranged between the pedestal and the sensitive core body. The manufacturing method comprises the following steps: S1, the pedestal, a sealing membrane and a buffer main body with a through hole are fixedly connected to the sensitive core body from the bottom up; the sensitive core body and the sealing membrane enclose the through hole to form a sealed cavity; S2, the temperature buffer medium is injected into the sealed cavity through a medium guiding hole, and a sealing member is used to seal the medium guiding hole; and S3: wire leading is carried out on the sensitive core body to obtain the thin film pressure transducer. The thin film pressure transducer is advantaged by being little influenced by the medium temperature, resistant to an instantaneous temperature impact, etc.

Low pressure sensing and imperviousness to corrosion and to the effects of harsh environments are achieved in a pressure sensor that employs a flexible membrane supporting piezoresistive elements. A plurality of piezoresistive elements are aligned substantially collinearly across one surface of the flexible membrane. Innermost piezoresistive elements are disposed in such a way that they experience tension in response to an applied pressure, whereas outermost piezoresistive elements are disposed in such a way that they experience compression in response to the same applied pressure. Contact pads for each end of each piezoresistive element allow the elements to be configured in any number of desirable arrangements. In one exemplary embodiment, four piezoresistive elements are disposed along a main central axis of the membrane. The contacts of the elements are connected to form a Wheatstone bridge. Conventional Wheatstone bridge techniques are utilized to convert an applied pressure into an output electrical signal. The membrane includes amorphous or nanocrystalline semiconductor layers grown on a flexible substrate such as Kapton or suitable plastic materials.

The invention relates to a foot posture information and pressure measurement system and intelligent sneakers, and aims at solving the problems that in the prior art, the postures of two feet cannot be measured, pressure sensor distribution is sparse, scanning frequency is low, and detailed dynamic foot sole pressure information cannot be provided. A flexible PCB (2-1) is installed on the portion, corresponding to the arch of the foot, inside a shoe sole of a sneaker body (1), a film pressure sensor (2-2) is installed at the contact part of the shoe sole and the sole of the foot, a battery container (4) is arranged on the portion, corresponding to a heel, inside the shoe sole, a status indicator lamp (5) is arranged on a shoe upper, and an ankle posture information measurement device (3) is fixed at an ankle to conduct wireless transmission with a foot sole posture information and pressure measurement device (2). The foot posture information and pressure measurement system and the intelligent sneakers are applied to wearable device fields.

The invention discloses a data glove for teaching programming of a robot dexterous hand. The data glove comprises five Flex 4.5-inch bending sensors fixed at the back part of the hand and used for detecting a bending state of the hand; FlexiForce film pressure sensors are respectively fixed at the inner sides of a thumb and a forefinger for controlling the nipping operation force of the robot dexterous hand; and the back part of the data glove is fixed with an AHRS nine-axle attitude sensor integrated on a PCB, an Arduino Nano controller, a bluetooth wireless communication device and a power supply battery. Moving postures of the hand can be obtained through the bending sensors, the film pressure sensors and the AHRS sensor; and the motion of the robot dexterous hand is controlled and the teaching programming is performed according to a corresponding relation between the change conditions of the sensors and the state of the robot dexterous hand. The data glove solves the problem of difficult and complex programming of a traditional robot dexterous hand, and is simple in structure and low in cost.

The invention provides an integrated chip, a thick film pressure sensor and a manufacturing method of the thick film pressure sensor. The integrated chip for the thick film pressure sensor comprises an elastic metal diaphragm and a conductive circuit, wherein the elastic metal diaphragm is provided with a deformation area for sensing pressure and a connection area connected with the deformation area, the conductive circuit comprises a plurality of piezoresistors and a thermistor, the piezoresistors are arranged on the upper surface of the elastic metal diaphragm and arranged in the deformation area, and the thermistor is arranged on the upper surface of the elastic metal diaphragm and arranged in the connection area.

The invention discloses a PET (poly(ethylene terephthalate)) protection film pressure-sensitive adhesive used for a manufacture process of a flat panel display, and a production method thereof. The PET protection film pressure-sensitive adhesive comprises the following six components in parts by weight: 50-75 parts of an adhesive component, 12-25 parts of a rigid component, 5-15 parts of a modifying component, 0.2-1 part of an internal crosslinking agent, 5-10 parts of an external crosslinking agent and 50-60 parts of an ester solvent. The pressure-sensitive adhesive provided by the invention has the advantages of low polarity (interfacial tension of 22-24 dyne / cm) and large cohesive force, is inert, has instantaneous adhesion property on the glass material surfaces of the flat panel display, does not fall out when being vapor-plated at 180 DEG C for 60 minutes, and is easy to be peeled without residual adhesive or pollution after being vapor-plated.

The invention relates to a three-dimensional multi-point type touch screen based on a pressure sensor. The three-dimensional multi-point type touch screen based on the pressure sensor comprises a capacitive touch screen body and a capacitive touch screen control chip, wherein the back surface of the capacitive touch screen body is provided with a film pressure sensor; the film pressure sensor is connected with a main control chip via a pressure sensor interface chip; the main control chip is connected with the capacitive touch screen control chip; a touch pressure value detected by the film pressure sensor is transmitted to the main control chip via the pressure sensor interface chip; the touch point number and the position information for capacitive touch screen touch are transmitted to the main control chip via the capacitive touch screen control chip; and according to the input information of the pressure sensor interface chip and the capacitive touch screen control chip, the touch point number, the touch position and the corresponding touch pressure of the touch operation of the capacitive touch screen body can be obtained by the main control chip. The three-dimensional multi-point type touch screen based on the pressure sensor, which is disclosed by the invention, has a simple and compact structure and is safe and reliable, the touch detection precision is improved, and the three-dimensional multi-point type touch operation detection is realized.

The invention relates to a laser fluorescent anti-fake tear tape with both sides in gold or silver stamping and a manufacturing method thereof. The laser fluorescent anti-fake tear tape comprises a polyethylene film, a gold face layer and a laser fluorescent face layer; the gold face layer and the laser fluorescent face layer are respectively composited on two sides of the polyethylene film; the gold face layer comprises a front stamping glue layer, a front aluminized layer, a gold-stripe ink layer, a front gloss oil protective layer and a pressure-sensitive adhesive layer; the laser fluorescent face layer comprises a back stamping glue layer, a red fluorescent layer, a laser film pressure layer, a back aluminized layer, a transparent character layer, a back gloss oil character-protective layer and a silicon oil layer arranged from inside to outside sequentially. Two rolls of PET polyester film are used as transfer film; the gold-stripe ink layer, the aluminized layers, the transparent character layer, the laser film pressure layer and the red fluorescent layer which are preprinted and coated on the PET polyester film are transferred to the front side and the back side of BOPP (biaxially-oriented polypropylene) film through the synchronous front-and-back side composite process, so that technological content and anti-fake performance of the anti-fake tear tape are improved.

The present invention relates to nano technology field. The process of arranging nano particles on the surface of solid base includes the specific steps of: dissolving chain organics molecule with hydrophilic or hydrophobic group into non-aqueous volatile solvent; dispersing nano particles in the said solution; spreading the non-aqueous solution on water as base liquid inside Langmuir tank and controlling the film pressure on the single-molecule film of the nano particles on the surface of water; transferring the film via vertical pulling process to treated surface of solid base to form Y-type LB film; and high temperature annealing or high-energy light beam irradiating the nano particle film to dissociate and evaporate organics molecule while leaving the nano particles on the base. The said process is simple, practical and effective and may be used widely.

The invention relates to a laser holographic mirror anti-counterfeiting film pressure casting process. The process is characterized by firstly, mold-pressing a metallic nickel plate on which laser anti-counterfeiting pattern information is carved and a BOPP (biaxially oriented polypropylene) film into a roll BOPP mask with pattern information, secondly, coating a layer of UV (ultraviolet) medium varnish on printing paper, film-pressing and casting the printing paper with the BOPP mask in a non-solid state, then carrying out irradiation with a UV light source to instantly cure the BOPP mask, and after curing, stripping and rolling the BOPP film with a stripping machine. The process has the following beneficial effects: the package and production costs can be effectively lowered; the preparation process is simple; the color is bright and the stereoscopic sense is strong; and in particular, as the laser holographic mirror anti-counterfeiting technology is directly realized on the common paper, the produced package is high in anti-counterfeiting grade, is not easy to counterfeit, is beautiful and is far better than the prior art in practicability, environment friendliness, anti-counterfeiting property, economy and the like.

The invention discloses an interface pressure distribution testing sensing element. The interface pressure distribution testing sensing element comprises a sensing film, electrodes uniformly arranged around the sensing film at intervals, a lead connected with the electrodes and an upper and lower insulating paint layer. The sensing film is made from a conductive polymer composite material provided with a piezo-resistive sensitivity characteristic, and the electrodes and the lead are used for outputting resistivity information of the sensing film in different positions. When in testing, the lead is connected with a testing instrument, the electrical impedance imaging technology is used for acquiring, testing and computing so as to obtain the resistivity distribution of the sensing film in different positions, and then the pressure distribution can be obtained through the relationship between the sensing film pressure and the resistivity. The interface pressure distribution testing sensing element can be used for measuring the interface pressure distribution and change, and has the advantages of simple structure, ultra-thin film, strong flexibility, high resolution and precision, large measuring range and low cost.

The invention discloses a high-precision water quality online automatic monitor, which comprises a quantifying system, a sampling system, a reaction system and a control system; the quantifying systemcomprises a measuring glass tube, and the upper part of the measuring glass tube is provided with an ultrasound wave sensor; the sampling system comprises a peristaltic pump and an eight-way valve which are connected through a pipeline; the reaction system comprises a digestion device and a light emitting and receiving device, the digestion device comprises a digestion pipe and a PT100 sensor; both ends of the digestion pipe are provided with electromagnetic valves, and the electromagnetic valves are connected with the digestion pipe; the light emitting and receiving device comprises a lightemitter and a light receiver which are arranged at both sides of the digestion pipe; the control system comprises a single chip, a memory and a display module. Compared with the prior art, the fluid in the measuring glass pipe and the rest fluid content in the reagent bottle can be exactly measured through the ultrasound wave sensor and a distributed film pressure sensor; the high-precision waterquality online automatic monitor has the advantages of being strong in multifunctional expanding property, high in sensitivity and low in cost.