CN204535912U - A kind of fluid thrust sensor - Google Patents

Abstract

A kind of fluid thrust sensor, the utility model is made up of thrust induction installation (1), the thrust measurement signal processor (2) being arranged on thrust induction installation (1) top, the housing (3) being located at thrust measurement signal processor (2) top, the large parts of protective net frame (4) four that cover on thrust induction installation (1) and thrust measurement signal processor (2) bottom; Its structure is: thrust induction installation 1 by horizontally set thrust tablet (1a), be vertically connected on the upper and thrust transmission lever (1b) be connected with thrust measurement signal processor (2) of thrust tablet (1a) and form; Wherein, the area of two workplaces of thrust tablet (1a) is greater than the radial area of thrust transmission lever (1b) respectively.The utility model reaches and can be integrated into the automatic control that in control system, realization is relevant to fluid thrust, and can be integrated in Portable Measurement Instrument and equipment and realize the quick detection of convection cell thrust or the object of measurement.

Description

A kind of fluid thrust sensor

Technical field

The utility model belongs to the fluid motion thrust measurement technical field of gaseous material and fluent meterial, be specifically related to one and can be placed in fluid (fluid containing in differential pressure environment and pressure environment) the directly and continuously thrust size that produces of test fluid motion export the device of electric signal, i.e. fluid thrust sensor.

Background technology

In modern times multiple sector application field; the thrust produced of moving with often needing convection cell carries out continuous detecting, thus judge fluid self conveying, whether be present in the object that carries in moving object in fluid or moving fluid normally or be in slave mode.The transfer efficiency of material that such as, in field of industrial production water, gas, vapour, oily conveying and employing fluid are carried and the detection of controllability; During industry wind-force selection by winnowing is produced, the wind of material divides quality and wind component efficiency to detect; The detection that the windage of configuration design in automobile manufacturing field detects and affects by beam wind in vehicle traveling; In navigational field, wind-force and wave to tilt even to topple dangerous detection to hull; In aviation field, aircraft is under complicated weather conditions, the stressed detection of body each significant points in air sinuous flow; The acting force that in wind tunnel experiment, wind-force produces test articles and lifting force detect; In meteorological field, to detection of the wind-force of frequent variations etc.But it is never a kind of simple and direct at present, effective and accurate means convection cell thrust detects, generally adopt pressure transducer traditionally, pressure difference detector, anemoscope, the equipment such as LOAD CELLS carry out indirect detection, and carry out converting and obtain the thrust of fluid, and these traditional approachs need to be converted by pressure difference value or electromagnetic flux indirectly to draw fluid thrust owing to can not directly detect the thrust of fluid, the promptness of the data obtained, accuracy and validity are had a greatly reduced quality, special in much production, under living condition, owing to not easily obtaining above complexity, unhandy detecting instrument or do not have suitable corresponding method of detection, even have employed detection means improperly, thus it is delayed to result in data message, inaccurate even mistake, often production and construction can be given, travel, activity of preventing and reducing natural disasters etc. causes a difficult problem.If can science, in time, reliably detect fluid thrust and data fed back to corresponding control system in time, so control system will make corresponding task instruction, send warning, or realize Intelligent closed-loop to control, improve human being's production power and security thereof, therefore, utilize fluid to move and certainly lead to this key property of thrust research invention fluid thrust sensor, in multiple field with industry is significant and actual application value.

Summary of the invention

The purpose of this utility model is exactly provide a kind of fluid thrust sensor that can be placed in fluid for the above-mentioned prior art defect existed at present, by the mode of the straight contacting with fluid of thrust induction installation, realize thrust size that directly and continuously test fluid motion produces and export electric signal, to solve directly, the difficult problem that timely and accurate test fluid thrust aspect exists, reach and can be integrated into the automatic control that in control system, realization is relevant to fluid thrust, and can be integrated in Portable Measurement Instrument and equipment and realize the quick detection of convection cell thrust or the object of measurement.

The principle of fluid thrust sensor:

The principle of pressure differential will inevitably be produced at the tow sides of the effigurate object of tool according to fluid matasomatism, the thrust induction installation that is made up of one piece of thrust tablet and a thrust transmission lever of fluid thrust sensor design, act on the double-edged pressure differential of thrust tablet for experiencing in residing environment fluid motion, and this pressure differential passed to thrust measurement signal processor by thrust transmission lever and convert electric signal aftertreatment to and export.

The purpose of this utility model is achieved by the following technical solution.

A kind of fluid thrust sensor, the utility model feature is, is made up of thrust induction installation, the thrust measurement signal processor being arranged on thrust induction installation top, the housing being located at thrust measurement signal processor top, the large parts of protective net frame four that cover on thrust induction installation and thrust measurement signal processor bottom; Its structure is:

Thrust induction installation by horizontally set thrust tablet, to be vertically connected on thrust tablet and the thrust transmission lever be connected with thrust measurement signal processor forms; Wherein, the area of two workplaces of thrust tablet is greater than the radial area of thrust transmission lever respectively;

Thrust induction installation, with the fluid thrust sensor of annular corrugated flexible edge, has the characteristic of carrying out fluid thrust detection in differential pressure environment; Wherein, thrust induction installation does not have the fluid thrust sensor of annular corrugated flexible edge, has the characteristic of carrying out fluid thrust detection in pressure environment; Wherein, the area of two workplaces of thrust tablet is greater than the radial area of thrust transmission lever respectively;

Thrust measurement signal processor is made up of the electric appliance component such as thrust measurement body, the signal amplification circuit at middle part, the ADC analog to digital converter on top being located at bottom;

Housing is made up of shape of container package casing and mounting and connection parts;

Protective net frame is made up of the basin shape protective framework on top, the protection net of bottom;

The utility model is provided with annular corrugated flexible edge in the outer rim being positioned at thrust tablet, adopts hold-down ring to compress.

The utility model thrust induction installation, with the fluid thrust sensor of annular corrugated flexible edge, has the characteristic of carrying out fluid thrust detection in differential pressure environment; Wherein, thrust induction installation does not have the fluid thrust sensor of annular corrugated flexible edge, has the characteristic of carrying out fluid thrust detection in pressure environment.

The utility model thrust transmission lever, be set to one section of columniform Metallic rod or ceramic bar, one end is vertically rigidly connected with the geometric center point of thrust tablet workplace, and the other end is rigidly connected with the force sensitive point of the workplace of thrust measurement body with stretching into shape of container package casing internal vertical.

Small-sized or miniature fluid thrust sensor can not have connecting link, and adopts thrust tablet and thrust measurement body unitary, injection-molded is shaping or welding fabrication etc. is suitable connected mode is replaced.

Annular corrugated flexible edge, the mode of Precision Machining couple can be adopted to manufacture and assemble to the joint portion of basin shape protective framework and thrust tablet if desired, this method will replace annular corrugated flexible limit, the needs detected with the fluid thrust being applicable to high pressure differential environment.

Thrust measurement body: its profile can be selected as designs such as cylindricality, box, semi-girder shape, shear beam shapes according to practical situations;

The utility model signal amplification circuit is the differential amplifier circuit that common-mode rejection ratio is high, adopts corresponding integrated operational amplifier element, is assemblied in shape of container package casing inner; The thrust electric signal that thrust measurement body exports is enlarged into the voltage signal of 0 ~ 10v or the current signal of 4 ~ 20mA by signal amplification circuit, realizes automatically controlling or monitoring application to be supplied to fluid control systems analog module.

Basin shape protective framework and protection net, all have enough mesh areas and intensity, so that normal measuring ability and safeguard function can not be hindered for basic demand; If desired also can with basin shape protective framework as the device installing fixed flow thrust body sensor.

The utility model fluid thrust sensor has following advantage:

1, the workplace of thrust tablet and fluid comprehensive engagement direct-detection fluid thrust, do not have middle stressed link not need to be detected by other indirect means yet.

2, fluid thrust sensor can carry out installation application (see Fig. 4) with random angle and orientation in three dimensions, in detected fluid environment, except the thrust Fa that tested measured fluid movement produces, thrust measurement body also can experience two acting forces such as the gravity Fc of fluid buoyancy Fb and thrust induction installation (thrust tablet and thrust transmission lever) self, these two acting forces all can be got rid of when the application zeroing of fluid thrust sensor, and therefore fluid thrust sensor can not by the restriction of installation direction.

3, fluid thrust sensor with annular corrugated flexible limit has the function of the similar detected pressures under differential pressure ambient conditions with existing pressure transducer, but transmit the mouth of pipe owing to there is not the pressure similar with existing pressure transducer, fluid in detected fluid environment E1 is from positive side to when skimming over thrust tablet plate face at a high speed, because there is not the problem producing negative pressure of vacuum without hole in thrust tablet surface, therefore, the performance of fluid thrust sensor test fluid thrust under differential pressure environmental baseline on the annular corrugated flexible limit of application band is existing pressure transducer incomparable (see Fig. 6).

4, fluid thrust sensor construction is simple, reliable, technology maturation, and manufacture difficulty is little, can manufacture and design multiple range specification and form-factor to be applicable to different application.

5, all parts all encapsulate as a whole, and degree of protection is high, can directly entirety be placed in the space of fluid existence, and only need connecting sensor to draw wire and can realize detecting, simple installation, takes up room little.

The fluid thrust that 6, can meet multi-field conglomerate detects demand, has the wide market space.

Accompanying drawing explanation

Fig. 1 a is the structural representation of the utility model fluid thrust sensor.

Fig. 1 b is also the structural representation of the utility model fluid thrust sensor

Fig. 2 a is hemisphere face shape thrust tablet fluid thrust sensor sectional view.

Fig. 2 b is hemisphere face shape thrust tablet fluid thrust sensor sectional view.

Fig. 3 is thrust measurement signal processor electrical schematic diagram.

Fig. 4 is each installation station mechanics analysis figure in pressure environment.

Fig. 5 is mechanics analysis figure in differential pressure environment.

Fig. 6 direct-detection wind in wind tunnel experiment acts on the method schematic diagram of the power on testee surface.

Figure number illustrates: 1 is thrust induction installation, and 2 is thrust measurement signal processors, and 3 is housings, and 4 is protective net frames.

Wherein thrust induction installation 1 is divided into: 1a is thrust tablet, and 1b is thrust transmission lever, and 1c is annular corrugated flexible edge.

Wherein thrust measurement signal processor 2 is divided into: 2a is thrust measurement body, and 2b is signal amplification circuit, and 2c is ADC analog to digital converter.

Its middle shell 3 is divided into: 3a is shape of container package casing, and 3b is mounting and connection parts.

Wherein protective net frame 4 is divided into: 4a is basin shape protective framework, and 4b compacting ring, 4c is protection net.

Accompanying drawing digital code illustrates: E1 is detected fluid environment, E2 is non-detected fluid environment, Fa is the thrust that fluid motion produces, Fb is the buoyancy of fluid media (medium) to thrust induction installation 1, Fc is the gravity of thrust induction installation 1, Fd is the pressure of non-detected fluid environment, Fa1 is the power that wind acts in test articles forward surface, Fa2 is the power that wind acts on test articles upper surface, Fa3 is the power that wind acts on test articles lower surface, Fy is the lifting force that wind produces test articles, M is the outside surface of test articles or the separation interface of differential pressure environment E1 and E2, T1 ~ T3 is the fluid thrust sensor 1 ~ 3 on band corrugated, flexible limit, V is the speed of wind in its direction of motion and wind speed.

Embodiment

See Fig. 1-Fig. 6, a kind of fluid thrust sensor, the utility model feature is, is made up of thrust induction installation 1, the thrust measurement signal processor 2 being arranged on thrust induction installation 1 top, the housing 3 being located at thrust measurement signal processor 2 top, the large parts of protective net frame 4 four that cover on thrust induction installation 1 and thrust measurement signal processor 2 bottom; Its structure is:

Thrust induction installation 1 by horizontally set thrust tablet 1a, to be vertically connected on thrust tablet 1a and the thrust transmission lever 1b be connected with thrust measurement signal processor 2 forms; Wherein, the area of two workplaces of thrust tablet 1a is greater than the radial area of thrust transmission lever 1b respectively;

Thrust measurement signal processor 2 is made up of the electric appliance component such as thrust measurement body 2a, the signal amplification circuit 2b at middle part, the ADC analog to digital converter 2c on top being located at bottom;

Housing 3 is made up of shape of container package casing 3a and mounting and connection parts 3b;

Protective net frame 4 is made up of the basin shape protective framework 4a on top, the protection net 4c of bottom;

The outer rim that the utility model is being positioned at thrust tablet 1a is provided with annular corrugated flexible edge 1c, adopts hold-down ring 4b to compress.The utility model thrust induction installation 1, with the fluid thrust sensor of annular corrugated flexible edge 1c, has the characteristic of carrying out fluid thrust detection in differential pressure environment; Wherein, thrust induction installation 1 does not have the fluid thrust sensor of annular corrugated flexible edge 1c, has the characteristic of carrying out fluid thrust detection in pressure environment.

The utility model thrust transmission lever 1b, be set to one section of columniform Metallic rod or ceramic bar, one end is vertically rigidly connected with the geometric center point of thrust tablet 1a workplace, and the other end is rigidly connected with the force sensitive point of the workplace of thrust measurement body 2a with stretching into shape of container package casing 3a internal vertical.

The utility model signal amplification circuit 2b is the differential amplifier circuit that common-mode rejection ratio is high, adopts corresponding integrated operational amplifier element, is assemblied in shape of container package casing 3a inner; The thrust electric signal that thrust measurement body 2a exports is enlarged into the voltage signal of 0 ~ 10v or the current signal of 4 ~ 20mA by signal amplification circuit 2b, realizes automatically controlling or monitoring application to be supplied to fluid control systems analog module.

The utility model is fixed on thrust transmission lever 1b termination and the large surface of the thrust tablet 1a two vertical with thrust transmission lever 1b is all workplace, its effect acts on pressure differential on thrust tablet 1a two workplaces and fluid thrust, (being one of critical component of this sensor) when being fluid motion in impression environment to be measured, thrust transmission lever 1b is the interface unit of thrust tablet 1a and thrust measurement body 2a, and its effect is that the fluid thrust that thrust tablet 1a receives is passed to thrust measurement body 2a, wherein, annular corrugated flexible edge 1c is the device that is flexible coupling between thrust tablet 1a and basin shape protective framework 4a, its Main Function two workplaces of thrust tablet 1a can be separated, to realize fluid thrust sensor for carrying out the function of fluid thrust detection in differential pressure environment, have steady propulsion tablet 1a can not the booster action of laterally offset simultaneously, wherein, with the fluid thrust sensor of annular corrugated flexible edge 1c, test fluid thrust in environment E1 and the E2 of pressure reduction may be there is in what two workplaces that can be applied to thrust tablet 1a should maybe must be separated, fluid thrust for example for gaseous state and liquid environment of being separated by or gaseous state and the isolated environment of gaseous state detects (see Fig. 5), after Fa+Fb-Fc-Fd=0 being made to application system zeroing when the fluid of surveyed environment is in static i.e. static state in Fig. 5, application system just can detect the fluid thrust Fa acted on thrust tablet 1a when running, do not establish the fluid thrust sensor of annular corrugated flexible edge 1c, two workplaces that then can be applied to thrust tablet 1a do not need to separate and are in test fluid thrust in same pressure environment E1, for example for sensor entirety being placed in a kind of gaseous environment or a kind of liquid environment test fluid thrust (see Fig. 4), Fig. 4 detects from below respectively with thrust tablet 1a, the fluid thrust Fa of top and horizontal direction is that example is analyzed, after Fa+Fb-Fc=0 (left figure) or Fa+Fc – Fb=0 (middle figure) or Fa=0 (right figure) being made to application system zeroing when the fluid of surveyed environment is in static i.e. static state, application system just can detect the fluid thrust Fa acted on thrust tablet 1a when running.

Thrust measurement signal processor 2 is made up of the electric appliance component such as thrust measurement body 2a, the signal amplification circuit 2b at middle part, the ADC analog to digital converter 2c on top being located at bottom; Wherein: the effect of thrust measurement body 2a converts the fluid thrust that thrust tablet 1a experiences to be proportional electric signal; The effect of signal amplification circuit 2b is amplified and be converted to analog electric signal by the electric signal that thrust measurement body 2a generates; The effect of ADC analog to digital converter 2c is that thrust measurement analog electric signal is converted to digital signal, and this ADC analog to digital converter 2c can be used as different model sensor one choosing dress device, does not select the fluid thrust sensor only outputting analog signal of dress.

Housing 3 is made up of shape of container package casing 3a and mounting and connection parts 3b; Its effect is loaded with protection thrust measurement signal processor 2 and supporting sensor assembly and can draw wire, it is the housing type support of fluid thrust sensor unit, wherein, shape of container package casing 3a is by thrust measurement body 2a and thrust transmission lever 1b false bearing thrust tablet 1a; Wherein, the housing 3 of small-sized and miniature fluid thrust sensor can be a nonocclusive support framework, and this support framework and protective net frame 4 all can substitute mounting and connection parts 3b.

Protective net frame 4 is made up of basin shape protective framework 4a, the hold-down ring 4b of below on top and the protection net 4c of bottom; The effect of protective net frame 4 has three, one is can with the annular corrugated flexible edge 1c seamless link at thrust tablet 1a edge for realizing the detection to differential pressure environment liquid thrust, and two is can stop that the material that may have in test environment drops on thrust measurement plate to affect accuracy of detection; Three is that the devices such as the thrust measurement body 2a of protection thrust induction installation 1 and housing 3 inside are from accidental damage.

The application scope that fluid thrust sensor is main and effect:

Fluid thrust sensor can be installed on the fluid force that the object that is in fluid is subject to for direct-detection object: in wind-tunnel environment, can act on acting force on testee surface by direct-detection wind by being arranged on fluid thrust sensor on testee, more directly to help improve the aerodynamic arrangement (see Fig. 6) of testee, when the fluid of test articles place environment is in static i.e. static state, application system is returned to zero in Fig. 6, make the Fa1-Fd=0 of sensor T1 respectively, after the Fa3+Fb1-Fc3-Fd=0 of Fa2-Fb2+Fc2-Fd=0 and T3 of T2, application system just can detect sensor T1 when running, the real fluid thrust that the thrust tablet 1a of T2 and T3 experiences is respectively Fa1, Fa2 and Fa3, and have special case: when the plate face of the thrust tablet 1a of T3 sensor parallel and perpendicular to the earth's core time, the lifting force Fy=Fa3 that wind speed V produces test articles, only when the thrust tablet 1a of T2 with T3 two sensors plate face assembling parallel and perpendicular to the earth's core time, the clean lifting force Fy that wind speed V produces test articles is clean=Fa3-Fa2, (in analysis, have ignored pressure difference environment E1, in E2 fluid buoyancy Fb1 and Fb2 between the difference that may exist, can be controlled when the actual zeroing of application system), at the key position of boats and ships, the lateral thrust that fluid thrust sensor can detect wind-force effect that hull is subject to or wave is installed, to revise course and the speed of a ship or plane, improves the nevigation safety of boats and ships, in the side of vehicle, fluid thrust sensor is installed, can when running into the beam wind of high strength alerting drivers Reduced Speed Now or temporary transient stagnation of movement, to improve the security of driving, at the key position of aircraft, fluid thrust sensor is installed, when running into air sinuous flow, airflow function position on aircraft and the situation of change of acting force numerical value thereof can be detected in time, security threat trend is analyzed, to realize reporting to the police to the real-time intelligent of air sinuous flow and researching and developing intelligent emergent auxiliary correction management system further early than other detection meanss, quick detection and the measurement of convection cell thrust is realized for the manufacture of portable sets such as special fluid thrust detecting instruments.

Fluid thrust sensor also can directly contact with fluid completely in relatively airtight environment in integral installation, the thrust that direct-detection fluid self produces in the movement direction and the thrust that the material carried by fluid is subject to: in water delivery, pipeline road, direct-detection liquid thrust improves transfer efficiency; In the pipeline by fluid-transmitting material material, detect the fluid thrust that material is subject to, accurately control efficiency and the flow of mass transport, ensure the materials quality in course of conveying; In wind subsystem direct-detection air draught to the thrust of material with improve and stable sorting quality; In fiber bag precipitator, direct-detection is containing the thrust of grit gas to regulate and control blowback cycle and pressurized air tolerance, improves efficiency of dust collection and life of bag filter.

The fluid thrust precise information that the utility model obtains also can be converted into rapidly common fluid motion (or relative motion) speed precise information by smart machine and be used, such as is integrated in the portable sets such as mobile phone, hand-held global positioning system and electronics instrument of surveying and mapping the hope that can meet people easily and realize detection in time and measure fluid thrust.

The function of the utility model parts:

Thrust tablet 1a: as the stressed member of direct-detection fluid thrust, generally select circular dull and stereotyped (see Fig. 1), semicircle sphere shape (see Fig. 2) or outer shape suitable with practical use, and adopt the metal material of not easily deformation or compound substance to make, the fluid environment that concrete physical dimension and material can detect according to reality carries out designing and selecting, and high temperature resistant, corrosion resistant material in particular cases can be adopted to make; The area of two workplaces of thrust tablet 1a is all greater than the radial area of thrust transmission lever 1b; It is outside that thrust tablet 1a is assemblied in shape of container package casing 3a, by thrust transmission lever 1b, this thrust is directly passed to thrust measurement body 2a; Wherein, the thrust tablet 1a of the semicircle sphere shape grit that can reduce in working environment piles up the impact on Detection results.

Thrust transmission lever 1b, be generally one section of columniform Metallic rod or ceramic bar, one end is vertically rigidly connected with the geometric center point of thrust tablet 1a workplace, and the other end is rigidly connected with the force sensitive point of the workplace of thrust measurement body 2a with stretching into shape of container package casing 3a internal vertical; Small-sized or miniature fluid thrust sensor can not have connecting link, and adopts thrust tablet 1a and thrust measurement body 2a unitary, injection-molded is shaping or welding fabrication etc. is suitable connected mode is replaced.

Annular corrugated flexible edge 1c: as the device that is flexible coupling between thrust tablet 1a and basin shape protective framework 4a, need to there is good pliability and do not affect and hinder thrust tablet 1a along the characteristic of thrust transmission lever 1b axially-movable, can according to thermotolerance, low temperature resistance, all kinds of environment for use condition such as corrosion resistance, select the aldary had under prior art conditions, aluminium alloy, plate (or paper tinsel) material of the metals such as stainless steel or polyurethane, the macromolecular material making that teflon etc. are various, the mode of Precision Machining couple can be adopted to manufacture and assemble to the joint portion of basin shape protective framework 4a and thrust tablet 1a if desired, this method will replace annular corrugated flexible limit 1c, with the needs that the fluid thrust being applicable to high pressure differential environment detects.

Thrust measurement body 2a: be directly rigidly connected (see Fig. 1) by thrust transmission lever 1b and thrust tablet 1a.Thrust measurement body 2a forms primarily of two parts, a part is sensibility elasticity body, thrust transmission lever 1b can be transmitted the strain value that the fluid thrust come is converted to sensibility elasticity body by sensibility elasticity body, its profile can be selected as designs such as cylindricality, box, semi-girder shape, shear beam shapes according to practical situations, is assemblied in shape of container package casing 3a inner, another part is signaling conversion circuit, be encapsulated in the inside of sensibility elasticity body, have four straingauges and indicate (resistance value is selected according to practical application) with R1 ~ R4 respectively, paired vertical and horizontal are pasted on elastic body, Hui Sitong balanced bridge (see Fig. 3) is connected to form by circuit, at A, electric bridge supply voltage U is introduced at B two ends, when sensibility elasticity body pushes generation sensibility elasticity deformation by thrust tablet 1a, the straingauge sticked on sensibility elasticity body also can deform thus cause resistance value to change causing the imbalance of electric bridge, so export the electric signal be directly proportional to fluid thrust.By calculating parameter, the data such as the change of output voltage Uout of electric bridge C, D end, the relative deformation coefficient of the resistance value of straingauge R1 ~ R4 and sensibility elasticity body, elastic modulus and cross-sectional area, thrust numerical value and the situation of change of fluid can be calculated accurately.

Signal amplification circuit 2b: be the differential amplifier circuit that a common-mode rejection ratio is high, adopts corresponding integrated operational amplifier element, is assemblied in shape of container package casing 3a inner; The thrust electric signal that thrust measurement body 2a exports is enlarged into the voltage signal of 0 ~ 10v or the current signal of 4 ~ 20mA by signal amplification circuit 2b, realizes automatically controlling or monitoring application (see Fig. 3) to be supplied to fluid control systems analog module;

ADC analog to digital converter 2c: adopt corresponding integrated circuit component, is assemblied in shape of container package casing 3a inner; The analog signals that signal amplification circuit 2b exports is converted to digital quantity signal Uout by ADC analog to digital converter 2c, carries out data transmission and be supplied to fluid control systems realizing automatically controlling or directly carrying out numerical value display (see Fig. 3) by fieldbus.

Housing 3: as the housing type support of this sensor unit, can be designed to the shape of container package casing 3a of the cylindrical tube of dust-protection type, closed type or corrosion-resistant type, rectangular cylinder or other patterns, material selection stainless steel, engineering plastics etc. as required; Wherein, shape of container package casing 3a outside surface suitable position designs on demand for the screw installing this sensor, flat-face flange, bayonet socket or other possible mounting and connection parts 3b, sensor unit is fixed in corresponding equipment, facility or apparatus body; Wherein, shape of container package casing 3a is not directly connected with thrust tablet 1a, therefore can not the power experienced of spread loss thrust tablet 1a, to guarantee detection accuracy and precision; Wherein, by thrust transmission lever 1b, the power being not orthogonal to thrust measurement body 2a workplace is passed to thrust measurement body 2a for overcoming thrust tablet 1a, surface of contact between shape of container package casing 3a and thrust transmission lever 1b can adopt the technical measures of Precision Machining couple to carry out processing and assemble (couple: be mutually slidably matched and all minimum shaft hole matching part of contact gap and friction force), to overcome thrust transmission lever 1b, radial force is passed to thrust measurement body 2a.

Protective net frame 4: protective net frame 4 is made up of basin shape protective framework 4a, hold-down ring 4b and protection net 4c, wherein: basin shape skeleton 4a is a hard skeleton shape support, the material punching such as steel plate or corrosion resistant plate of suitable thickness can be adopted, or adopt die casting to make, one end that bore is less is fixed on shape of container package casing 3a, one end that bore is larger is and a workplace of a thrust tablet 1a planar annular at grade, in order to bonding annular corrugated flexible edge 1c; The planar annular of basin shape protective framework 4a there is pilot hole, for installing hold-down ring 4b and protection net 4c; Wherein, hold-down ring is becket, for annular corrugated flexible edge 1c being pressed on the planar annular of basin shape protective framework 4a; Wherein, protection net 4c is a wire mesh or metal wire knitted guard, can repeat dismounting, and user can determine whether according to concrete environment for use to install protection net 4c; Wherein, basin shape protective framework 4a and protection net 4c all has enough mesh areas and intensity, so that normal measuring ability and safeguard function can not be hindered for basic demand; If desired also can with basin shape protective framework 4a as the device installing fixed flow thrust body sensor.

Fluid thrust sensor compares with the performance difference of other proximity sensors existing or instrument and equipment:

The similarities and differences (referring to table 1) of fluid thrust sensor and pressure transducer:

The similarities and differences of table 1 fluid thrust sensor and pressure transducer

The difference (referring to table 2) of fluid thrust sensor and balance, weighing apparatus:

The difference of table 2 fluid thrust sensor and balance, weighing apparatus

Claims (4)

1. a fluid thrust sensor, it is characterized in that, be made up of thrust induction installation (1), the thrust measurement signal processor (2) being arranged on thrust induction installation (1) top, the housing (3) being located at thrust measurement signal processor (2) top, the large parts of protective net frame (4) four that cover on thrust induction installation (1) and thrust measurement signal processor (2) bottom; Its structure is:

Thrust induction installation (1) by horizontally set thrust tablet (1a), be vertically connected on the upper and thrust transmission lever (1b) be connected with thrust measurement signal processor (2) of thrust tablet (1a) and form; Wherein, the area of two workplaces of thrust tablet (1a) is greater than the radial area of thrust transmission lever (1b) respectively;

Thrust measurement signal processor (2) by being located at the thrust measurement body (2a) of bottom, the signal amplification circuit (2b) at middle part, ADC analog to digital converter (2c) electric appliance component on top form;

Housing (3) is made up of shape of container package casing (3a) and mounting and connection parts (3b);

Protective net frame (4) is made up of the basin shape protective framework (4a) on top, the protection net (4c) of bottom.

2. a kind of fluid thrust sensor according to claim 1, is characterized in that, the outer rim being positioned at thrust tablet (1a) is provided with annular corrugated flexible edge (1c), adopts hold-down ring (4b) to compress.

3. a kind of fluid thrust sensor according to claim 1, it is characterized in that, thrust transmission lever (1b), be set to one section of columniform Metallic rod or ceramic bar, one end is vertically rigidly connected with the geometric center point of thrust tablet (1a) workplace, and the other end stretches into shape of container package casing (3a) internal vertical ground and is rigidly connected with the force sensitive point of the workplace of thrust measurement body (2a).

4. a kind of fluid thrust sensor according to claim 1, it is characterized in that, signal amplification circuit (2b), is the differential amplifier circuit that common-mode rejection ratio is high, adopt corresponding integrated operational amplifier element, be assemblied in shape of container package casing (3a) inner; The thrust electric signal that thrust measurement body (2a) exports is enlarged into the voltage signal of 0 ~ 10v or the current signal of 4 ~ 20mA by signal amplification circuit (2b), realizes automatically controlling or monitoring application to be supplied to fluid control systems analog module.