CN106441469A - Hygienic corrosion-resistant intelligent sensor - Google Patents
Hygienic corrosion-resistant intelligent sensor Download PDFInfo
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- CN106441469A CN106441469A CN201610937338.9A CN201610937338A CN106441469A CN 106441469 A CN106441469 A CN 106441469A CN 201610937338 A CN201610937338 A CN 201610937338A CN 106441469 A CN106441469 A CN 106441469A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/006—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus characterised by the use of a particular material, e.g. anti-corrosive material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2219/00—Thermometers with dedicated analog to digital converters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a hygienic corrosion-resistant intelligent sensor which comprises a shell, a probe and a circuit. An adapter is in threaded connection with a probe body, a plane of a lowest thread and the lower surface of the adapter are coplanar, and the outer surface of the adapter is a smooth surface. The upper portion of the thread of the probe body is provided with a groove while the lower portion of the thread is provided with a step, a seal gasket is arranged at the groove, and a seal ring is arranged at the step. The upper end face of a connector is provided with a step on which a seal ring is arranged, the lower end of the connector is in a shape of a round tube, the outer wall of the round tube is provided with two grooves, and seal rings are arranged in the two grooves respectively. The hygienic corrosion-resistant intelligent sensor is resistant to water, dust and dirt and applicable to high-temperature, high-pressure and high-corrosion environments, reaches IP69K in protection level and is not limited in general industrial fields and capable of meeting the field of the hygienic industry; the adapter is in various forms, and the probe can be combined with different adapters to meet mounting demands under different conditions.
Description
Technical field
The present invention relates to a kind of corrosion-resistant Intelligence sensor of sanitation-grade.
Background technology
In the prior art, for fluid flow and temperature detection are two single products.
Flow transducer is used for, in flux monitoring system, when flow velocity reaches the flow velocity threshold values of setting, producing detection signal,
For starting interlock protection system；Their complex structure heaviness, installation difficulty, the easy temperature influence of precision and be deteriorated, resist dry
Ability is disturbed, and gas, liquid can not be general.Temperature sensor is used for displays temperature and produces control signal, and charactron is used
Menu state is set in display button.
Both the above equipment is the most frequently used in automated system, can use this two classes sensing in most systems simultaneously
Device, as two equipment independently, operate, safeguard and install all comparatively laborious, while bringing system wiring complicated and can
By sex chromosome mosaicism.Traditional flow transducer probe does not take effective measures solution heat conducting problem in structure；And
And, great majority are all fixed by the way of attaching nut's locking, contact mounting surface with measured medium in plane, it is impossible to anti-after installation
Water is dust-proof, cannot apply in some special industries, for example medical treatment, health field；And, existing flow transducer probe
Architectural limitation, degree of protection is more not reaching to IP69K, it is impossible to suitable for high temperature, high pressure, the environment of deep-etching.
Content of the invention
The shortcoming of prior art in view of the above, present invention aim at provide a kind of sanitation-grade corrosion-resistant intelligent biography
Sensor, the institute for possessing flow transducer and/or temperature sensor is functional, with good conduction thermal-insulation function, after installation with
Measured medium contact mounting surface is in plane, and water proof and dust proof is antifouling, it is adaptable to high temperature, high pressure, the environment of deep-etching.
For achieving the above object and other related purposes, the present invention provides a kind of sanitation-grade corrosion-resistant Intelligence sensor,
Including housing, probe and circuit part, the circuit part includes several circuit boards, the housing and probe all using corrosion-resistant
Metal material is made；The housing include lid and lower cover, described under be covered with 2 draw-in grooves, top draw-in groove is provided with sealing ring, under
Portion's draw-in groove is provided with sealing gasket, and upper lid passes through interference fit seal with lower cover, and the probe is with the lower cover by interference fit even
Connect, in the upper lid, fixed support is provided with, the fixed support has the cavity for accommodating the circuit board, and the probe is included even
Fitting, probe body, adapter and air chamber, the air chamber is arranged on the bottom of the probe body, the bottom of the air chamber and
Side is respectively provided with a groove, and the connector is loaded from the top of probe body and is connected with the probe body interference fit,
The both sides of the probe body are provided with two symmetrical spanner draw-in grooves, and the middle part of the probe body is provided with one section of screw thread, described
Adapter is threadeded with the probe body, and bottom one encloses screw thread place plane with the lower surface of the adapter same
On horizontal plane, the outer surface of the adapter is shiny surface, and the threaded upper portion of the probe body is provided with a groove, in screw thread
Bottom be provided with a step, be provided with sealing gasket in groove, be provided with sealing ring at step, the upper surface of the connector sets
There is a step, step is provided with sealing ring, and lower end is cylindrical, the outer wall of the circular tube shaped of the step lower end is provided with two
Groove, is respectively equipped with sealing ring in groove.
Preferably, the fixed support is that plastic parts, the plastic parts is made up of the component of 2 semiellipse shapes, ellipse half
The inwall of the component of round shape is provided with bayonet socket, and the circuit board is respectively arranged in the upper cavity and lower chamber, described upper and lower
Connecting line in cavity between circuit board by following structure setting, the pre-buried connecting line of one or metal on the upper and lower cavity
Post, the circuit board in the upper and lower cavity is connected by the connecting line, or arranges contact, the upper and lower cavity on circuit boards
In circuit board contacted by the contact and corresponding metal column and realize electrical connection；Or on the dividing plate between upper and lower cavity
Through hole and O-ring seal are set, then a connecting line is set through the through hole and O-ring seal, the electricity in the upper and lower cavity
Road plate is connected by the connecting line.
Preferably, the circuit part includes several circuit boards, and the circuit board is provided with source unit, signals collecting list
Unit, temperature collecting cell, temperature compensation unit, signal amplification unit, single-chip microcomputer, output unit, output protection unit, outside control
Unit processed, display unit, the signal gathering unit, temperature collecting cell are arranged in probe body；The power subsystem, temperature
Degree compensating unit, signal amplification unit, single-chip microcomputer, output unit, output protection unit, external control unit outside, display unit set
Put in the enclosure interior.
Preferably, the temperature collecting cell is to adopt the digital integrated electronic circuit based on PT1000 or LM73 temperature sensor
Chip, the temperature collecting cell is connected with single-chip microcomputer single-chip microcomputer signal, and single-chip microcomputer is connected with temperature compensation unit signal, temperature
Signal sends to after single-chip microcomputer is processed through temperature collecting cell and sends temperature compensation unit to, and temperature compensation unit sends control letter
Number, the signal is conveyed to collecting unit heating element and controls its temperature.Temperature collecting cell transmits a signal to single-chip microcomputer
A temperature value is obtained after process, and this temperature value is transferred to temperature compensation unit by single-chip microcomputer, and temperature compensation unit is according to list
After piece machine is processed, this temperature value for obtaining carrys out the temperature of control signal collecting unit heating element, so as to by signals collecting list
The temperature difference control of the temperature of first heating element and medium controls temperature using this in certain value according to heat-conduction principle
The method of degree difference, eliminates impact of the temperature to signal gathering unit, so as to ensure precision of the product in full temperature scope, described
External control unit outside can realize flow autolearn feature, can be by button study and distance learning two ways come real
Existing.
Preferably, the power subsystem is provided with anti-interference, antistatic, anti-lightning strike barrier assembly components and parts, with very strong
Anti-lightning strike and interference free performance, the barrier assembly includes magnetic bead and choking-winding, and the choke coil is arranged on the defeated of power supply
Enter end, the common mode interference signal in suppression circuit；Meanwhile, a magnetic bead in parallel after the choke coil, for eliminating electricity
High-frequency interferencing signal in road；Meanwhile, power subsystem is connected with housing and connects the earth, with release circuit inside excess charge and
Interference.
Preferably, the circuit board is provided with：
The temperature filter circuit that input is connected with the temperature detecting unit outfan；The output letter of the temperature filter circuit
Number inputing to central processing circuit is processed；
Input is connected with the differential amplifier that flow detection unit outfan is connected, input and the differential amplifier outfan
Connect flow filter circuit；The output signal of the flow filter circuit inputs to central processing circuit and is processed；
Used as the central processing circuit of data processor, the central processing circuit is provided with temperature drift compensating circuit and voltage model
Enclose learning circuit；
D/A change-over circuit, the input of the D/A change-over circuit is connected with an outfan of the central processing circuit, institute
State voltage range learning circuit and provide digital reference signal for the D/A change-over circuit, the outfan of the D/A change-over circuit with
The input connection of reference voltage module, digital reference signal is converted to analog reference signal to base by the D/A change-over circuit
Quasi- voltage module；
Reference voltage module, its outfan is connected with the differential amplifier, and the reference voltage module is by analog reference signal
After process, it is that differential amplifier provides reference voltage；
Display driver circuit, its input is connected with the central processing circuit, its outfan be respectively equipped with temperature outfan and
Flow outfan；The display driver circuit is additionally provided with gyroscope or gravity sensing device, can adjust temperature and show as needed
Show the direction of numerical monitor on circuit and flow indication circuit；
Temperature output circuit, its input is connected with the central processing circuit, one of its outfan and output protection circuit
Input connects；
Flow output circuit, its input is connected with the central processing circuit, and its outfan is another with output protection circuit
Individual input connection；
Output protection circuit, its outfan is connected with an input of the central processing circuit, if temperature signal and/or
Flow signal exceedes setting value, triggering central processing circuit is started and is arranged at its internal protection circuit.
The display unit includes：
Temperature display circuit, its input is connected with the temperature outfan, and shows corresponding temperature detection information；
Flow indication circuit, its input is connected with the flow outfan, and shows corresponding flow detection information；The temperature
Degree detector unit, flow detection unit gather the temperature signal of measured medium, flow signal respectively and are transferred to the centre
Reason circuit, data are respectively by the temperature display circuit, flow indication circuit output and/or display numerical value letter after treatment
Number.
Preferably, the connector being additionally provided with the housing for connecting external cable, the connector includes to be fixed on
Gold in the cavity that connecting portion and integral hermetic on the housing is packaged on the housing and is provided with positioned at the connecting portion
Category contact, the hard contact is made up of metal column, and through the housing and fixed support, and company corresponding with the circuit board
Connect, the external cable is flexibly connected by the union joint for being mated with the connecting portion, while making each holding wire of external cable
Correspond with the hard contact and electrically connect, the connecting portion is a flanged (FLGD) hollow circuit cylinder, the flange is used for will
Connecting portion is fixed on housing, and hard contact is covered by the cavity of the cylinder, cylinder be provided with for the connecing of external cable
The screw thread of mate connection or buckle, the end face that the hard contact is located at the side of hull outside is outer less than the housing
Surface, i.e. each hard contact are all disposed within a circular pit, are corresponded to therewith, are installed on the connector on external cable
Metal probe, the metal probe is provided with seal member, and the seal member is parcel on the cylinder of the metal probe
The material of insulative water-proof, the top end face of the metal probe is exposed, when the metal probe corresponds the insertion metal
During the pit that contact is located, its end face is electrically connected with the hard contact, a part for its seal member and the pit outer wall
Interference fit, so as to reach the purpose of sealing.
Preferably, the display cover includes temperature display unit and flow quantity display unit, and the display cover is internal from upper lid
Fixed by pressing piece, for showing current flow and temperature.
Preferably, the adapter is welding adapter or chuck adapter.Adapter can also be the suitable of other forms
Orchestration.
Preferably, the output unit corresponds to flow output respectively and/or temperature output produces monitoring signal, when the prison
When the output type of control signal is output switch parameter, exported by NPN audion, PNP audion or relay, when described
When the output type of monitoring signal is analog output, output current is 4～20mA, output voltage is 0～10V, the temperature
Collecting unit is the digital integrated circuit chip using based on PT1000 or LM73 temperature sensor, the temperature collecting cell with
Single-chip microcomputer single-chip microcomputer signal connects, and single-chip microcomputer is connected with temperature compensation unit signal.
As described above, a kind of corrosion-resistant Intelligence sensor of sanitation-grade of present invention offer, has the advantages that：Tool
The institute of standby flow transducer and/or temperature sensor is functional, reliability is high, accuracy of detection accurately, will not temperature influence, resist
Interference performance is strong, can carry out flow monitor in real time to gas, liquid and other medium, with flow autolearn feature, can pass through
Button study is realized with distance learning two ways.With good conduction thermal-insulation function, contact with measured medium after installation
Mounting surface is in plane, and water proof and dust proof is antifouling, it is adaptable in high temperature, high pressure, the environment of deep-etching, degree of protection up to IP69K, no
General industrial circle is confined to, health industry field can also be met, adapter has various ways, pop one's head in and fit from different
Orchestration combination can meet the installation requirements of different operating modes.
Description of the drawings
Fig. 1 passes the sectional view of corrosion-resistant Intelligence sensor for sanitation-grade.
Fig. 2 is the outside drawing that the sanitation-grade of specific embodiment one passes corrosion-resistant Intelligence sensor.
Fig. 3 is the outside drawing that the sanitation-grade of specific embodiment two passes corrosion-resistant Intelligence sensor.
Fig. 4 is the theory diagram that the sanitation-grade of specific embodiment one passes corrosion-resistant Intelligence sensor.
Fig. 5 is the theory diagram that the sanitation-grade of specific embodiment two passes corrosion-resistant Intelligence sensor.
1. housing；Cover on 11.；111. pressing pieces；112. show cover；113. button；114. connector；115 plastic parts；
12. lower covers；121. sealing ring；122. sealing gasket；2. circuit part；21. circuit boards；3. pop one's head in；31. probe body；311. it is close
Seal；312. sealing ring；32. probe body lower surfaces, 321. sealing gaskets；322. sealing ring；33. adapters；34. air chambers；
35. connectors；A. temperature display unit；B. flow quantity display unit.
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 5.It should be clear that structure depicted in this specification institute accompanying drawings, ratio, size etc., all only in order to
Coordinate the content disclosed in description, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualificationss that applies, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
Whole, under the effect for not affecting the present invention can be generated by and the purpose that can reach, still all should fall in disclosed skill
In the range of art content is obtained and can be covered.Meanwhile, in this specification cited as " on ", D score, "left", "right", " centre " and
The term of " one " etc., is merely convenient to understanding for narration, and is not used to limit the enforceable scope of the present invention, its relativeness
It is altered or modified, under no essence change technology contents, when being also considered as the enforceable category of the present invention.
Specific embodiment one：
As shown in Figure 1, Figure 2, Figure 4 shows, the present invention provides a kind of sanitation-grade corrosion-resistant Intelligence sensor, it is adaptable to the survey of flow
Amount.Including housing 1, probe 3 and circuit part 2, the circuit part 2 includes several circuit boards 21, the housing 1 and probe 3
All made using corrosion-resistant metal materials；Housing 1 is comprising upper lid 11 and lower cover 12, and upper lid 11 and lower cover 12 are all using metal material
Make, fixed by interference fit between upper lid 11 and lower cover 12, by the sealing ring 121 on lower cover 12 and sealing gasket 122
To seal；The probe 3 is connected by interference fit with the lower cover 12, is provided with plastic parts 115, the modeling in the upper lid 11
Glue part 115 is made up of the component of 2 semiellipse shapes, is provided with bayonet socket on the inwall of the component of semiellipse shape, for fixing described
Circuit board 21, the probe 3 includes connector, probe body 31, adapter 33 and air chamber 34, and the air chamber 34 is arranged on described
The bottom of probe body 31, for fixing circuit board 21, the bottom of the air chamber 34 and side are respectively provided with a groove, the company
Fitting 35 is loaded from the top of probe body 31 and is connected with 31 interference fit of the probe body, the both sides of the probe body 31
Two symmetrical spanner draw-in grooves are provided with, the middle part of the probe body 31 is provided with one section of screw thread, the adapter 33 and the spy
Head main body 31 is threaded, and bottom one encloses screw thread place plane with the lower surface of the adapter 33 in same level,
The outer surface of the adapter 33 is shiny surface, and the threaded upper portion of the probe body 31 is provided with a groove, under screw thread
Portion is provided with a step, is provided with sealing gasket 321 in groove, is provided with sealing ring 322, the upper end of the connector 35 at step
Face is provided with a step, and step is provided with sealing ring 12, and lower end is cylindrical, is provided with two grooves on the outer wall of pipe, recessed
Sealing ring 311 is respectively equipped with groove.
The circuit part 2 of control flow transducer work is provided with inside housing 1, and upper lid 11 is provided with display cover 112, button
113rd, connector 114, show that cover 112 is fixed from upper lid is internal by pressing piece 111, for showing current flow；Button 113
Load from the surface of housing 1, for adjusting flow switch point, study calibrated fluxes height；Connector 114 is provided with sealing ring
121, connector 114 stretches into housing 1 by the circular hole of upper lid side, and connector 114 is used for connecting external cable, in housing 1
The function of remote flow study while the circuit part 2 in portion is powered, can also be realized by external cable；Plastic parts 115
For permanent circuit part 2, antidetonation, insulation, jamproof effect is played.
Lower cover 12 is provided with 2 draw-in grooves, and top draw-in groove is provided with sealing ring 121, and bottom draw-in groove is provided with sealing gasket 122, close
Seal 121 and sealing gasket 122 play the effect of water proof and dust proof.A circular hole is provided with the middle of lower cover 1, and circular hole has extended downwardly one
Boss.
The adapter 33 is welding adapter or chuck adapter.Adapter can also be the adapter of other forms.
The upper lid 11 is provided with display cover 112 and button 113, can show current flow by showing cover 112, pass through
Button 113 can adjust flow switch point, study calibrated fluxes height.
Circuit part 2 is arranged on inside housing 1, including power subsystem, signal gathering unit, temperature collecting cell, temperature
Compensating unit, signal amplification unit, single-chip microcomputer, output unit, output protection unit, external control unit outside, display unit.Signal
Collecting unit is arranged on inside probe body, for detected gas or liquid medium flow state.
The temperature collecting cell is to adopt the digital integrated circuit chip based on PT1000 or LM73 temperature sensor, institute
State temperature collecting cell to be connected with single-chip microcomputer single-chip microcomputer signal, single-chip microcomputer is connected with temperature compensation unit signal, temperature signal warp
Temperature collecting cell sends to after single-chip microcomputer is processed and sends temperature compensation unit to, and temperature compensation unit sends control signal, should
Signal is conveyed to collecting unit heating element and controls its temperature.After temperature collecting cell transmits a signal to single-chip microcomputer process
Obtain a temperature value, this temperature value is transferred to temperature compensation unit by single-chip microcomputer, temperature compensation unit according to single-chip microcomputer at
This temperature value for obtaining after reason carrys out the temperature of control signal collecting unit heating element, so as to signal gathering unit is generated heat
The temperature difference of the temperature of components and parts and medium controls in certain value, according to heat-conduction principle, using this control temperature difference
Method, eliminates impact of the temperature to signal gathering unit, so as to ensure precision of the product in full temperature scope.Further,
The external control unit outside can realize flow autolearn feature, can by button study and distance learning two ways come
Realize.
The power subsystem is provided with anti-interference, antistatic, anti-lightning strike barrier assembly components and parts, with very strong anti-lightning strike
And interference free performance, the barrier assembly includes magnetic bead and choking-winding, and the choke coil is arranged on the input of power supply, suppression
Common mode interference signal in circuit；Meanwhile, a magnetic bead in parallel after the choke coil, for eliminating in circuit
High-frequency interferencing signal；Meanwhile, power subsystem is connected with housing and connects the earth, with release circuit inside excess charge and interference.
As shown in figure 4, the Cleaning Principle of this sensor is as follows：
Power subsystem provides voltage to unit, and temperature collecting cell collection current temperature signal inputs to single-chip microcomputer, signal
The flow signal for collecting is inputed to single-chip microcomputer after signal amplification unit amplification by collecting unit, and then, single-chip microcomputer can basis
Set range of flow produces reference voltage, and two groups of signals of temperature collecting cell and signal gathering unit are processed together,
Single-chip microcomputer is exported the error amount for drawing to temperature compensation unit by calculating contrast, is input into after temperature compensated cell processing again
To single-chip microcomputer, the result of process is shown by display unit and corresponding output signal is exported by output unit, defeated
Go out unit and can realize multiple way of outputs and be divided into by output type：1. output switch parameter, NPN, PNP, relay output,
2. analog output mode：4～20mA, 0～10V；Output protection unit can realize short-circuit protection, overload protection, reversed polarity
The functions such as protection, when output signal is beyond given amount, offer is protected and is reported to the police by output protection unit, and external control unit outside leads to
Cross button to control, for flow switch point is adjusted, learn calibrated fluxes height.Meanwhile, circuit part of the present invention integrally enters
Go anti-interference process, power subsystem is provided with that magnetic bead, choke coil etc. be anti-interference, antistatic, anti-lightning strike components and parts, isolate,
High frequency and common mode interference signal inside shielded power supply, anti-stop signal deformation；Meanwhile, power supply be connected with housing connect the earth, release
The internal excess charge in electric discharge road and interference, with very strong anti-lightning strike and interference free performance.
In order to improve the sealing property of whole sensor, the signal gathering unit, temperature collecting cell one further
It is encapsulated in probe, such as using resin, plastics or other plastics seal material integral packagings and some in the upper end encapsulation of probe
Probe prepared by metal column, the signal gathering unit, the lead-out wire (signal transmssion line) of temperature collecting cell are in probe inside
Correspondence is electrically connected on the probe respectively, and the top of the probe is exposed, its cylinder gum elastic or plastic wraps.Described
12 bottom of housing lower cover is complete, defines closed cavity, be circuit board to hold between upper lid and lower cover, and lower cover bottom sets
Have for by the hard contact of signal gathering unit, temperature collecting cell and circuit board communication, the hard contact is by metal column
Make, and run through the lower cover bottom, and correspondings with the circuit board connect, the probe corresponded with the hard contact
Electrical connection, the hard contact is located at the outer surface of the end face less than the lower cover bottom of the side of lower cover bottom outer, i.e., every
Individual hard contact is all disposed within a circular pit, is corresponded to therewith, when the probe corresponds the insertion hard contact
During the pit at place, its end face is electrically connected with the hard contact, a part for its seal member and the pit outer wall interference
Coordinate, so as to reach the purpose of sealing.
Specific embodiment two：
As shown in Fig. 1, Fig. 3, Fig. 5.The corrosion-resistant Intelligence sensor of a kind of sanitation-grade, it is adaptable to flow, the measurement of temperature.Including
Housing 1, probe 3 and circuit part 2, the circuit part 2 includes several circuit boards 21, the housing 1 and probe 3 all using resistance to
Corrosion metal material is made；Housing 1 is comprising upper lid 11 and lower cover 12, and upper lid 11 and lower cover 12 are all made using metal material, on
Fixed by interference fit between lid 11 and lower cover 12, sealed by the sealing ring 121 on lower cover 12 and sealing gasket 122；
The probe 3 is connected by interference fit with the lower cover 12, is provided with fixed support in the inner chamber of the housing, and the fixation is propped up
Frame is plastic parts 115, and the plastic parts 115 is made up of the component of 2 semiellipse shapes, is set on the inwall of the component of semiellipse shape
There is bayonet socket, for the circuit board 21 is fixed, the probe 3 includes connector 35, probe body 31, adapter 33 and air chamber
34, the air chamber 34 is arranged on the bottom of the probe body 31, for fixing circuit board 21, the bottom of the air chamber 34 and side
Face is respectively provided with a groove, and the connector 35 loads with 31 interference fit of the probe body even from the top of probe body 31
Connect, the both sides of the probe body 31 are provided with two symmetrical spanner draw-in grooves, and the middle part of the probe body 31 is provided with one section of spiral shell
Stricture of vagina, the adapter 33 is threadeded with the probe body 31, and bottom one encloses screw thread place plane and the adapter
33 lower surface is in same level, and the outer surface of the adapter 33 is shiny surface, the threaded upper portion of the probe body
A groove is provided with, and a step is provided with the bottom of screw thread, is provided with sealing gasket in groove, is provided with sealing ring at step,
The upper surface of the connector 35 is provided with a step, and step is provided with sealing ring, and lower end is cylindrical, on the outer wall of pipe
Two grooves are provided with, in groove, are respectively equipped with sealing ring.
The adapter 33 is welding adapter or chuck adapter.Adapter 33 can also be the adaptation of other forms
Device.
As shown in figure 3, housing 1 includes lid 11 and lower cover 12, upper lid 11 is provided with display cover 112, button 113, connector
114, show that cover 112 includes temperature display unit A and flow quantity display unit B, show that cover 112 is internal by pressing piece from upper lid
111 fix, for showing current flow and temperature；Button 113 loads from the surface of housing, for learning calibrated fluxes height
Menu setting and the function selecting such as point, switch point selection, temperature unit selection；Connector 114 is provided with sealing ring, from upper lid 11
The circular hole of side stretches into housing, and connector 114 is used for connecting external cable, while power supply to circuit part, can also pass through
External cable come realize remote flow study function；Plastic parts 115 is used for permanent circuit part 2, plays antidetonation, insulation, resists
The effect of interference.Lower cover 12 is provided with 2 draw-in grooves, and top draw-in groove is provided with sealing ring 121, and bottom draw-in groove is provided with sealing gasket 122,
Sealing ring 121 and sealing gasket 122 play the effect of water proof and dust proof.Double flute design substantially increases sealing property, plays waterproof, prevents
Damp and dust-proof effect, also easily improves explosive-proof grade.Be provided with a circular hole in the middle of lower cover, circular hole extended downwardly one convex
Platform.
The circuit board 21 includes at least independent two pieces, and the support bracket fastened cavity is the epicoele of separate sealing
Body and lower chamber, the circuit board is respectively arranged in the upper cavity and lower chamber, in the upper and lower cavity between circuit board
Connecting line by following structure setting：
The pre-buried connecting line of one or metal column on the upper and lower cavity, the circuit board in the upper and lower cavity passes through the connecting line
Connection, or contact is set on circuit boards, the circuit board in the upper and lower cavity is connect with corresponding metal column by the contact
Touch and realize electrical connection；Or through hole and O-ring seal be set on the dividing plate between upper and lower cavity, then a connecting line is set wears
The through hole and O-ring seal is crossed, the circuit board in the upper and lower cavity is connected by the connecting line.
In order to improve the sealing property of product further, it is additionally provided with for connecting patching for external cable on the housing
Part 114, in certain embodiments, the connector 114 includes the connecting portion being fixed on the housing 1 and integral hermetic encapsulation
Hard contact in the cavity being provided with the housing 1 and positioned at the connecting portion, the hard contact is made up of metal column,
And through the housing and fixed support, and correspondings with the circuit board connect, the external cable by with the connecting portion
The union joint of coupling is flexibly connected, while making each holding wire of external cable electrically connect with hard contact one-to-one corresponding.Tool
For body, when production prepares connector, first the number of contacts of external connection as needed, prepares the metal column of respective numbers
(typically select copper post, or copper post is silver-plated etc.), then installs the position of connecting portion in housing and the corresponding position of fixed support is bored
Hole, metal column is inserted one by one above-mentioned aerial so as to through housing and the fixed support of enclosure interior, then irrigated with fluid sealant
Sealing metal post and the gap between housing and fixed support, reach the purpose of sealing, are then installed in place connecting portion (general
Connecting portion is a flanged (FLGD) hollow circuit cylinder, and flange (can be solid with bonding or screw for connecting portion is fixed on housing
Fixed), hard contact is covered by the cavity of cylinder, cylinder be provided with the screw thread being connected for the patch plug coupling with external cable or
Buckle.
In order to further optimize above-mentioned encapsulation scheme, the hard contact is located at the end face of the side of hull outside and is less than
The outer surface of the housing 1, i.e. each hard contact are all disposed within a circular pit (when mounted, by metal column to shell
Internal portion's passage so as to which outer surface is sunk in the through hole of housing), correspond to therewith, the connector 114 being installed on external cable
On metal probe, the metal probe is provided with seal member, and the seal member is to wrap up on the cylinder of the metal probe
Insulative water-proof material (as plastics, rubber or other resilient insulant of tool are made), the top of the metal probe
End face is exposed, when the metal probe corresponds the pit that the insertion hard contact is located, its end face and the metal
Contact electrical connection, a part for its seal member and the pit outer wall interference fit, so as to reach the purpose of sealing, now,
Even if whole sensor is all placed in conducting medium, use is nor affected on.
The circuit being arranged on the circuit board includes：The temperature detection list that input is connected with the temperature sensor
The temperature filter circuit that unit, input are connected with the temperature detecting unit outfan；The output letter of the temperature filter circuit
Number inputing to single-chip microcomputer is processed；Flow detection unit, input and flow that input is connected with the flow transducer
The differential amplifier of detector unit outfan connection, input and the differential amplifier outfan connection traffic filter circuit；
The output signal of the flow filter circuit inputs to single-chip microcomputer and is processed；As the single-chip microcomputer of data processor, the list
Piece machine is provided with temperature drift compensating circuit and voltage range learning circuit；D/A change-over circuit, the input of the D/A change-over circuit
End is connected with an outfan of the single-chip microcomputer, and the voltage range learning circuit provides numeral for the D/A change-over circuit
Reference signal, the outfan of the D/A change-over circuit is connected with the input of reference voltage module, and the D/A change-over circuit will
Digital reference signal is converted to analog reference signal to reference voltage module；Reference voltage module, its outfan is differential with described
Amplifier connects, and after analog reference signal is processed by the reference voltage module, is that differential amplifier provides reference voltage；Show
Drive circuit, its input is connected with the single-chip microcomputer, and its outfan is respectively equipped with temperature outfan and flow outfan；Described
Display driver circuit is additionally provided with gyroscope or gravity sensing device, can adjust temperature display circuit and flow is aobvious as needed
Show the direction of numerical monitor on circuit；
The display unit includes：Temperature display circuit, its input is connected with the temperature outfan, and shows corresponding temperature
Degree detection information；Flow indication circuit, its input is connected with the flow outfan, and shows that corresponding flow detection is believed
Breath；The temperature detecting unit, flow detection unit gather respectively temperature signal from temperature sensor and flow transducer,
Flow signal is transferred to the single-chip microcomputer, and data are defeated by the temperature display circuit, flow indication circuit respectively after treatment
Go out and/or show numerical signal.
As shown in figure 5, the Cleaning Principle of electric part is as follows：
Temperature detecting unit is used for detecting the temperature signal of measured medium, by the temperature signal of detection after being processed by filter circuit
It is transferred to single-chip microcomputer；Flow detection unit is used for detecting flow velocity and the temperature of measured medium, the flow velocity inside flow detection unit
Inductive reactance and temperature sense resistance are connected with single-chip microcomputer, and single-chip microcomputer output digit signals are to D/A modular converter, D/A modulus of conversion
Analogue signal is transferred to reference voltage module by block, and flow detection module transmits a signal to differential together with reference voltage module
Amplifier section amplifies, and is defeated by single-chip microcomputer after filtered processing of circuit, and single-chip microcomputer carries out internal temperature drift compensation again；Voltage range
Learning device is connected to single-chip microcomputer, arranges flow rate test scope for artificial；The flow signal for gathering and temperature are believed by single-chip microcomputer
Flow output and temperature output is carried out after number carrying out conversion process, and output protection circuit is mainly used to detect output signal size,
And the output signal of output protection unit collection is fed back to single-chip microcomputer, single-chip microcomputer judges whether that output is normal；Meanwhile, single-chip microcomputer
Exported to display unit is driven by serial communication, drive display unit that display module unit is outputed signal to, by charactron
With LED, temperature signal and flow signal are shown；External control unit outside can realize flow autolearn feature, permissible
Realized by button study and distance learning two ways；Can be also used for learning calibrated fluxes height, opened by key control
Close menu setting and the function selecting such as point selection, temperature unit selection；Distance learning function with button learning functionality be the same,
Difference is that distance learning is the long-range cable drawn by connector 114 realizing height study, facilitates user's long distance
From manipulation.Power transfer module is mainly used to provide required voltage to unit；Immunity module is used for preventing electromagnetism
Electrostatic etc. is disturbed, and improves stability and the reliability of product.The immunity module is mainly by one or two anti-interference element group
Become, then strengthen jamproof skill in circuit layout using some.Immunity module removes above-mentioned metal shell, modeling
Glue part, connect outside geodesic, mainly realized by magnetic bead and common mode choke on circuit, along with the utilization in PCB layout
Some strengthen jamproof layout skills, specifically, are provided with common mode choke in the input of power supply, for suppression circuit
In common mode interference signal；Meanwhile, a magnetic bead in parallel after choke coil, for eliminating the letter of the High-frequency Interference in circuit
Number；Meanwhile, power subsystem is connected with housing and connects the earth, with release circuit inside excess charge and interference, so as to strengthen product
The interference free performance of product.
Further, the single-chip microcomputer corresponds to flow output respectively and temperature output produces two-way monitoring signal, when described
When the output type of monitoring signal is output switch parameter, exported by NPN triode, PNP triode or relay, when described
When the output type of monitoring signal is analog output, output current is 4～20mA, output voltage is 0～10V.Press output side
Formula is divided into, and two-wire system and three-wire system are exported.
When being necessary, the circuit can also be set up：Temperature output circuit, its input is with the single-chip microcomputer even
Connect, its outfan is connected with an input of output protection circuit；Flow output circuit, its input is with the single-chip microcomputer even
Connect, its outfan is connected with another input of output protection circuit；Output protection circuit, its outfan and the single-chip microcomputer
The connection of input, if temperature signal and/or flow signal exceed setting value, triggering single-chip microcomputer is started and is arranged at which
Internal protection circuit.Output protection unit can realize multiple protection work(such as short-circuit protection, reverse polarity protection, overload protection
Energy.Temperature display unit adopts 3 seven segment digital tubes displays temperature numerical value, and temperature shows by menu setting just can also be carried out
Reversely show；Flow quantity display unit shows flow using 10 LED, from left to right word order, with the luminous number of LED come table
Show the size of flow.
In sum, the present invention provides a kind of sanitation-grade corrosion-resistant Intelligence sensor, possesses flow transducer and/or temperature
The institute of degree sensor is functional, reliability is high, accuracy of detection accurately, will not temperature influence, strong antijamming capability, can be to gas
Body, liquid and other medium carry out flow monitor in real time, with flow autolearn feature, can be learnt by button and distance learning
Two ways is realizing.With good conduction thermal-insulation function, mounting surface is contacted after installation with measured medium in plane, waterproof is prevented
Dirt is antifouling, it is adaptable in high temperature, high pressure, the environment of deep-etching, and degree of protection is not limited to general industry neck up to IP69K
Domain, can also meet health industry field, and adapter has various ways, pop one's head in and can meet not from different adapter combinations
Installation requirements with operating mode.So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial exploitation value
Value.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any ripe
The personage for knowing this technology all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
All equivalent modifications for becoming or change, must be covered by the claim of the present invention.
Claims (10)
1. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade, it is characterised in that：Including housing, probe and circuit part, the electricity
Road part includes that several circuit boards, the housing and probe are all made using corrosion-resistant metal materials；The housing includes lid
And lower cover, described under be covered with 2 draw-in grooves, top draw-in groove is provided with sealing ring, and bottom draw-in groove is provided with sealing gasket, and upper lid and lower cover are logical
Interference fit seal is crossed, the probe is connected by interference fit with the lower cover, in the upper lid, fixed support is provided with, described
Fixed support has the cavity for accommodating the circuit board, and the probe includes connector, probe body, adapter and air chamber, institute
The bottom that air chamber is arranged on the probe body is stated, the bottom of the air chamber and side are respectively provided with a groove, the connector
Load from the top of probe body and be connected with the probe body interference fit, the both sides of the probe body are provided with two symmetrically
Spanner draw-in groove, the middle part of the probe body is provided with one section of screw thread, and the adapter is threadeded with the probe body, most
Screw thread place plane is enclosed with the lower surface of the adapter in same level in lower section one, and the outer surface of the adapter is light
Sliding surface, the threaded upper portion of the probe body is provided with a groove, is provided with a step in the bottom of screw thread, is provided with groove
Sealing gasket, is provided with sealing ring at step, and the upper surface of the connector is provided with a step, and step is provided with sealing ring, under
End is cylindrical, and the outer wall of the circular tube shaped of the step lower end is provided with two grooves, is respectively equipped with sealing ring in groove.
2. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 1, it is characterised in that：The fixed support
For plastic parts, the plastic parts is made up of the component of 2 semiellipse shapes, is provided with bayonet socket on the inwall of the component of semiellipse shape,
The circuit board includes at least independent two pieces, and the support bracket fastened cavity is upper cavity and the cavity of resorption of separate sealing
Body, the circuit board is respectively arranged in the upper cavity and lower chamber, and the circuit board in the upper cavity, lower chamber is by even
Wiring connects.
3. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 2, it is characterised in that：On the circuit board
It is provided with source unit, signal gathering unit, temperature collecting cell, temperature compensation unit, signal amplification unit, single-chip microcomputer, output list
Unit, output protection unit, external control unit outside, display unit, the signal gathering unit, temperature collecting cell are arranged on probe
In main body；The power subsystem, temperature compensation unit, signal amplification unit, single-chip microcomputer, output unit, output protection unit, outer
Portion's control unit, display unit are arranged on the enclosure interior.
4. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 3, it is characterised in that：The temperature acquisition
Unit is to adopt the digital integrated circuit chip based on PT1000 or LM73 temperature sensor, the temperature collecting cell and monolithic
Machine single-chip microcomputer signal connects, and single-chip microcomputer is connected with temperature compensation unit signal.
5. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 4, it is characterised in that：The power subsystem
Anti-interference, antistatic, anti-lightning strike barrier assembly components and parts are provided with, the barrier assembly includes magnetic bead and choking-winding, described
Choke coil is arranged on the input of power supply, a magnetic bead in parallel, the power subsystem and the housing after the choke coil
Connect and connect the earth.
6. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 2, it is characterised in that：On the circuit board
It is provided with：
The temperature filter circuit that input is connected with the temperature detecting unit outfan；The output letter of the temperature filter circuit
Number inputing to central processing circuit is processed；
Input is connected with the differential amplifier that flow detection unit outfan is connected, input and the differential amplifier outfan
Connect flow filter circuit；The output signal of the flow filter circuit inputs to central processing circuit and is processed；
Used as the central processing circuit of data processor, the central processing circuit is provided with temperature drift compensating circuit and voltage model
Enclose learning circuit；
D/A change-over circuit, the input of the D/A change-over circuit is connected with an outfan of the central processing circuit, institute
State voltage range learning circuit and provide digital reference signal for the D/A change-over circuit, the outfan of the D/A change-over circuit with
The input connection of reference voltage module, digital reference signal is converted to analog reference signal to base by the D/A change-over circuit
Quasi- voltage module；
Reference voltage module, its outfan is connected with the differential amplifier, and the reference voltage module is by analog reference signal
After process, it is that differential amplifier provides reference voltage；
Display driver circuit, its input is connected with the central processing circuit, its outfan be respectively equipped with temperature outfan and
Flow outfan；The display driver circuit is additionally provided with gyroscope or gravity sensing device, can adjust temperature and show as needed
Show the direction of numerical monitor on circuit and flow indication circuit；
Temperature output circuit, its input is connected with the central processing circuit, one of its outfan and output protection circuit
Input connects；
Flow output circuit, its input is connected with the central processing circuit, and its outfan is another with output protection circuit
Individual input connection；
Output protection circuit, its outfan is connected with an input of the central processing circuit, if temperature signal and/or
Flow signal exceedes setting value, triggering central processing circuit is started and is arranged at its internal protection circuit.
The display unit includes：
Temperature display circuit, its input is connected with the temperature outfan, and shows corresponding temperature detection information；
Flow indication circuit, its input is connected with the flow outfan, and shows corresponding flow detection information；The temperature
Degree detector unit, flow detection unit gather the temperature signal of measured medium, flow signal respectively and are transferred to the centre
Reason circuit, data are respectively by the temperature display circuit, flow indication circuit output and/or display numerical value letter after treatment
Number.
7. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 6, it is characterised in that：On the housing also
The connector being provided with for connecting external cable, the connector includes connecting portion and the integral hermetic being fixed on the housing
Hard contact in the cavity for being packaged on the housing and being provided with positioned at the connecting portion, the hard contact is by metal column system
Become, and through the housing and fixed support, and correspondings with the circuit board connect, the external cable by with the connection
The union joint of portion's coupling is flexibly connected, while making each holding wire of external cable electrically connect with hard contact one-to-one corresponding.
8. the corrosion-resistant Intelligence sensor of a kind of sanitation-grade according to claim 7, it is characterised in that：The display cover bag
Temperature display unit and flow quantity display unit is included, the display cover is fixed from upper lid is internal by pressing piece.
9. a kind of corrosion-resistant Intelligence sensor of sanitation-grade according to any one claim of claim 1 to 8, its feature
It is：The adapter is welding adapter or chuck adapter.
10. the corrosion-resistant intelligent decoupled sensor of one kind according to claim 9, it is characterised in that：The output is single
Unit corresponds to flow output respectively and/or temperature output produces monitoring signal, when the output type of the monitoring signal is switching value
During output, exported by NPN audion, PNP audion or relay, when the output type of the monitoring signal is simulation
During amount output, output current is 4～20mA, output voltage is 0～10V, the temperature collecting cell is adopted based on PT1000
Or the digital integrated circuit chip of LM73 temperature sensor, the temperature collecting cell is connected with single-chip microcomputer single-chip microcomputer signal, single
Piece machine is connected with temperature compensation unit signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610937338.9A CN106441469A (en) | 2016-10-25 | 2016-10-25 | Hygienic corrosion-resistant intelligent sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610937338.9A CN106441469A (en) | 2016-10-25 | 2016-10-25 | Hygienic corrosion-resistant intelligent sensor |
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| Publication Number | Publication Date |
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| CN106441469A true CN106441469A (en) | 2017-02-22 |
Family
ID=58178174
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610937338.9A Pending CN106441469A (en) | 2016-10-25 | 2016-10-25 | Hygienic corrosion-resistant intelligent sensor |
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| CN109443490A (en) * | 2018-11-20 | 2019-03-08 | 伊玛精密电子（苏州）有限公司 | A kind of intelligent level sensor |
| CN109489728A (en) * | 2018-12-14 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | A kind of sensor |
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Application publication date: 20170222 |