CN106441693A - Double limiting digital pressure gauge - Google Patents
Double limiting digital pressure gauge Download PDFInfo
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- CN106441693A CN106441693A CN201610817026.4A CN201610817026A CN106441693A CN 106441693 A CN106441693 A CN 106441693A CN 201610817026 A CN201610817026 A CN 201610817026A CN 106441693 A CN106441693 A CN 106441693A
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- 238000000429 assembly Methods 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
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- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0026—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Provided is a double limiting digital pressure gauge. The double limiting digital pressure gauge comprises a shell, a bourdon tube part and a double limiting digital pressure gauge machine core. The double limiting digital pressure gauge is characterized in that the double limiting digital pressure gauge machine core assembly unit comprises a PCB plate and an assembly unit which is superimposed by a pressure gauge machine core upper lid and a pressure gauge machine core lower lid and packaged in the rounded shell body; the assembly unit comprises a displacement rotating plate, a handle, a displacement rotating plate supporting shaft, a permanent magnet, an upper bearing, a lower bearing, a lining plate, a stepping motor module used for driving measured pressure pointer, a stepping motor module used for driving upper limit/lower limit pressure pointer. The assembly unit supports three-pointer digital indication. The PCB plate is provided in a pasted mode with a wireless single chip microcomputer which supports a ZigBee protocol stack, a stepping motor driver chip and a magnet displacement detection chip, and supports a ZigBee protocol of a wireless communication local area network and a SPI protocol of a super-speed synchronization serial communication bus at the same time. The double limiting digital pressure gauge has no electric contacts, has long service life and good maintaining performance, and is a brand new type digital pressure gauge.
Description
Technical field
The present invention relates to a kind of double spacing digital pressure gauge, it is mainly used in oil, chemical industry, metallurgy, power station and secondary water-supply
Field, the pressure of the medium such as measurement liquid, steam or gas, can realize wireless networking by ZigBee wireless communication protocol in real time
And remote monitor.
Background technology
Traditional electro connecting pressure gauge is widely used in the industrial circles such as oil, chemical industry, metallurgy, power station, and measurement is no quick-fried
Fried dangerous various gases, the pressure of fluid media (medium).Taking control air compressor as a example, when gas storage filling pressure arrival lower limit is automatic
Open compressor, when reaching the upper limit, be automatically turned off compressor.So that secondary water-supply to control water pump high building constant voltage to send wetting system as a example,
Start water pump in the lower limit of ductwork pressure, switch off the pump in the upper limit of ductwork pressure, and so on, reach and automatically control
Purpose.
Traditional electro connecting pressure gauge by measuring system, instruction system, magnetic help electric contact set, shell, adjusting apparatus and
Terminal box（Connector assembly）Deng composition.The operation principle of its instrument is, when not playing the liquid of corrosiveness, steam to steel and copper alloy
Or the measured medium such as gas enters after elastic sensing element is spring tube cavity by pipe joint part, bourdon tube is in tested Jie
Pressure transition can easily be produced by the elastic characteristic being had using it in the presence of matter pressure for bourdon tube free end
Corresponding elastic displacement, its displacement is converted to corresponding corner displacement by quadrant drive enlarger and linkage, and
Conduct to the simulation gauge pointer synchronous with corner displacement, cause indicators turn to show pressure, and the scale in registration device
The current pressure of measured medium is indicated on groove, meanwhile, gauge pointer drives moving contact and the upper limit setting on pointer
Or lower restriction contact is connected or cuts off, cause the circuit in control system to be turned off or connect, automatically controlled with reaching and
Bound transmits the purpose of warning.
Content of the invention
Technical problem
Traditional electro connecting pressure gauge is a kind of pressure instrumentation of simulation, is mainly made up of three parts, and one is housing, two
It is elastic sensitive detection element bourdon tube, the simulation instruction device that three are made up of hairspring, gear, connecting rod and pointer and slip are electric
The simulation movement combination that resistive transmitter is constituted.This traditional electro connecting pressure gauge decades are consistent, substantially have no
Change.Its internal structure is that, in circular inside the shell, have a bourdon tube made with seamless copper pipe or seamless steel pipe, curved
Become C-shaped, bourdon tube cross section ovalize, its oval major axis is paralleled with the central shaft of indicator, bourdon tube one end and pipeline
Communicate and become fixing end, the other end is the free end of closing and is connected with one end of connecting rod, the other end of connecting rod is sector gear,
Sector gear is connected with the little gear phase on central shaft.When being subject to the pressure of medium in special bourdon tube, will be formed certain
Zernike annular polynomial, this Zernike annular polynomial can make bourdon tube stretch out, because bourdon tube free end is not fixed, will be deformed, its
The size of deformation depends on the pressure size of measurement medium, and the deformation of bourdon tube drives sector gear to turn with little gear through connecting rod
Dynamic, so that pointer is turned an angle clockwise, the pressure of medium is bigger, indicators turn angle is also bigger.Work as pressure drop
When low, spring tube bending can shrink inwards, makes pointer return to corresponding position, after distress resolves, spring tube bending returns to former
The shape come, by the effect of hairspring, pointer returns to starting point zero-bit.From the above it can be seen that the deformation of bourdon tube is passed through to simulate movement
Indirectly shown the pressure of measurement medium by pointer, by central slide contact in the position of potentiometer, tested pressure value with
The change of charge value reaches away from the secondary meter of measurement apparatus, and due to transmission is analog signal, therefore antijamming capability
All it is restricted with transmission range.Significantly, since the pulse characteristic of working media, its pressure curve amplitude is larger,
During pressure gauge work, the vibrations of pointer are larger, and this is very harmful to pressure gauge, and reading is forbidden, and how to overcome existing pressure
The defect of power table, teletransmission simulated pressure table is transformed into double spacing digital pressure gauges, and the exactly present invention puts forth effort problem to be solved.
Technical scheme
For solving above-mentioned technical problem, the present invention proposes a kind of double spacing digital pressure gauge, and its substance is improved by, and passes through
Three pointer-digitizations are indicated that technology, magnetic sensing displacement detection technique, numeral are logical by a kind of double spacing digital pressure gauge movement simultaneously
Letter technology combines, and supports Zigbee protocol and the SPI high-speed synchronous serial communication bus of wireless communication LAN simultaneously
Agreement, its pressure upper limit pointer and threshold pression pointer all can be set by key-press programmable, realize the Isobarically Control of pipe network, also may be used
Use as one of technology of Internet of things pressure wireless sensing node, be that the update of traditional analog electro connecting pressure gauge is produced
Product.
Its technical scheme is specific as follows：
A kind of double spacing digital pressure gauge, is made up of shell, spring tube portion, double spacing digital pressure gauge movement three part, institute
The casing part stated includes, front-end case, bonnet, attacker, pawl, scale panel, threshold pression pointer, observed pressure pointer,
Pressure upper limit pointer, threshold pression preparatory function button L, pressure upper limit preparatory function button R, minimizing function button Dn, increase
Function button Up, 2.4G antenna pedestal, 2.4G mast and five core aviation sockets, described spring tube portion includes bourdon tube and connects
Head, C-spring pipe, bourdon tube hinge, arc pull bar, it is characterized by：
Described double spacing digital pressure gauge core part includes lid and core of pressure meter lower cover on pcb board and core of pressure meter
The part of encapsulation in the circular shell being overlapped, described being encapsulated on core of pressure meter is covered and the portion in core of pressure meter lower cover
Part includes displacement rotation dish, handle, displacement rotation dish support shaft, permanent magnet, upper bearing (metal) and lower bearing, liner plate, observed pressure and refers to
Pin drives to be driven with stepper assemblies, pressure upper limit pointer and is driven with stepping electricity with stepper assemblies, threshold pression pointer
Thermomechanical components；
Described pcb board is the quadrangle of four sideband radians, has magnetic induction hole and four location holes thereon, and pcb board mounts
There are the wireless singlechip supporting ZigBee2006 protocol stack, the stepper motor driver chip being used for step pitch subdivision, magnetic displacement detection
Chip, pcb board pass through screw with after four spud piles covering be connected；
Cover under described core of pressure meter and have a bar-shaped trough, the center of displacement rotation dish and displacement rotation dish support shaft phase
Even, the handle that displacement rotation dish is stretched out is connected through bar-shaped trough with one end of arc pull bar, the other end of arc pull bar and C-shaped bullet
The bourdon tube hinge of the free end of reed pipe is connected, and the other end of C-spring pipe is connected with spring pipe joint, and described displacement rotates
One upper bearing (metal) and a lower bearing are socketed with disk support shaft, its upper bearing (metal) is fixedly mounted on the upper bearing (metal) embedded hole seat of liner plate
In, the lower bearing that lower bearing is fixedly mounted on core of pressure meter lower cover embeds in stepped hole, described displacement rotation dish support shaft
One end embed one piece of foursquare permanent magnet, displacement rotation dish support shaft pass through core of pressure meter lower cover lower bearing embed platform
The magnetic induction hole of pcb board is stretched to, the circular magnetic susceptibility part of its magnetic displacement detection chip just mounts be aligned magnetic induction behind rank hole
At hole, but do not contact, when C-spring pipe occurs elastic deformation displacement, position is driven by bourdon tube hinge, arc pull bar, handle
Move turn disc, so that the permanent magnet in embedded displacement rotation dish support shaft is also deflected, the circle of magnetic displacement detection chip
Magnetic susceptibility partly can detect the change in magnetic flux density amount parallel to chip surface, the output of described magnetic displacement detection chip
Pin is connected with the I/O port of wireless singlechip；
Cover four core of pressure meter guide piles under described core of pressure meter, during installation, be inserted directly into four on pcb board
In location hole, described observed pressure pointer driving stepper assemblies are arranged on liner plate（38）One side on, pressure upper limit
Pointer driving stepper assemblies and threshold pression pointer driving stepper assemblies are then arranged on the another side of liner plate,
Observed pressure pointer is arranged in the actual measurement pointer driving shaft of observed pressure pointer driving stepper assemblies, and pressure upper limit refers to
Pin is arranged in the upper limit pointer driving shaft of pressure upper limit pointer driving stepper assemblies, and threshold pression pointer is arranged on down
In the lower limit pointer driving shaft of limits pressure pointer driving stepper assemblies, three drive shafts are concentrically nested, but no interfere, with
Upper described three stepper assemblies respective stepper motor coil output pin welds after being each passed through core of pressure meter lower cover
Connect and be fixed on pcb board, and by the printed wiring I/O pin phase with micro-step motor driving chip respectively on pcb board
Even, observed pressure pointer rests on the position on scale panel, the pressure of as current instruction.
It is respectively embedded into a touch key on four angles on described front-end case, be threshold pression preparatory function respectively
Button L, pressure upper limit preparatory function button R, minimizing function button Dn, increase function button Up.
Top on described front-end case is provided with the Zigbee protocol of a support wireless communication LAN
2.4G antenna pedestal, and be connected with 2.4G mast.
Install five core aviation sockets, the drawing of five core aviation sockets at the lower left side in dead ahead on described front-end case
Pin definition is respectively power supply VCC, ground wire GND, clock signal SCLK, data output SDO, enables signal CS, and described above five
Individual pin is corresponding with the pin of wireless singlechip respectively to be connected.
Four liner plate location holes are had on described liner plate, is fixed by screws in the liner plate support of core of pressure meter lower cover
On.
Four attackers are stamped on described circular core of pressure meter, under circular core of pressure meter, have covered four pawls,
After on core of pressure meter, lid is overlapped with core of pressure meter lower cover, four attackers just tangle four pawls, make on core of pressure meter
Lid and core of pressure meter lower cover are connected.
Technique effect
Double spacing digital pressure gauge proposed by the invention has as follows significantly beneficial effect：
1st, a kind of collection pressure data collection proposed by the invention, the instruction of many pointer-digits, digital cable transmission and digital radio
Communication function is melted into the double spacing digital pressure gauge of the whole body, and the work of its creativeness includes, and takes the lead in employing double spacing numeral pressures
Power table cassette mechanism structure and wireless singlechip, magnetic induction shift technique, stepper motor driven three pointer-digitizations instruction technology,
The spi bus communication technology, this instrument not only can complete one point data as the sensing node of an Industry Control site pressure
Acquisition function, and large-scale distributed WLAN system can be applied to as a monitoring terminal, particularly adapt to
Concentration controlled in wireless in ductwork pressure.
2nd, eliminate the simulation damper portion such as hairspring being easily damaged in traditional electro connecting pressure gauge completely in structure and principle
The mechanical speed-control device of part and up/down limits pressure pointer and magnetic help electric contact set, and thereon/threshold pression pointer all can button
Programming sets, long service life, and maintainability is good, is a brand-new digital pressure gauge phenotype.
3rd, substantial improvements of the present invention include, and support Zigbee protocol and the high-speed synchronous of wireless communication LAN simultaneously
Serial communication bus SPI protocol, its embedded wireless singlechip based on ZigBee 2006 protocol stack, incorporate ZigBee no
The good characteristic of line LAN, has the features such as low cost of manufacture, operation small power consumption so as to pressure monitoring terminal is different from biography
The pressure wireless sensing node of system, has data display and preprocessing function, the data that can effectively reduce wireless network gulps down
The amount of telling, when wireless network meets with congestion, monitoring terminal remains able to independent operating, completes to partial region data collection and prison
Control.Therefore, meaning of the present invention is to change the structure of wireless network, reduces control system for pressure end node
Dependence, enhances the robustness of whole control system.Especially interesting is that traditional electro connecting pressure gauge is Industry Control
Scene and the main test instrumentation of pipe network water supply equipment, it contactless and digitlization are for realizing Industry Control site pressure control
A kind of internet of things networking of node processed, there is provided brand-new solution.
4th, the substantial improvements of the present invention also include, due to the pulse characteristic of working media, traditional electro connecting pressure gauge
During work, the vibrations of pointer are larger, and this is very harmful to the pressure gauge using hairspring structure, and particularly movable contact pointer exists
When swinging near up/down limit pointer, it is also possible between two electric contacts to produce electric spark, then leads to the electricity between electric contact over a long time
Corrosion.And in the present invention, can effectively improve the pulse characteristic of pointer by the method for digital filtering, because observed pressure refers to
Pin and threshold pression pointer, pressure upper limit pointer no physics contact portion, so there is not the spark eroding between electric contact yet,
Its strong antijamming capability, the life-span greatly prolongs.
5th, based on the double spacing digital pressure gauge designed by the present invention not still traditional analog electro connecting pressure gauge optimal more
New regeneration product, actually it is also proposed the optimal case being updated transforming to existing simulated pressure table, this is because, this
Invention rationally remains elastic sensitive detection element part in traditional electro connecting pressure gauge, has increased the double spacing number of compact newly
Digital pressure gauge movement need only directly be replaced simulation instruction by word core of pressure meter, the therefore transformation to existing electro connecting pressure gauge
Movement, you can existing simulation electro connecting pressure gauge is escalated into double spacing digital pressure gauges.
6th, described magnetic displacement detection chip is the monolithic integrated optical circuit using planar Hall sensing technology, and it can detect
To the change in magnetic flux density being led to due to permanent magnet rotation parallel to chip surface, the automatic benefit of the achievable temperature drift of chip
Repay, the very high digital absolute displacement signal of the degree of accuracy is exported by its pin, this signal is delivered in single-chip microcomputer, such that it is able to standard
The really deformation displacement amount of detection spring pipe, single-chip microcomputer passes through digital filtering and engineering change of variable, can be converted under current pressure
Step angle needed for Driving Stepping Motor throw of pointer, and realize pressure data numeral transmission by spi bus, there is cost
Cheap, the high feature of certainty of measurement.
Brief description
The double spacing digital pressure gauge outline drawing of Fig. 1；
Fig. 2 removes the inside rear view of bonnet；
Fig. 3 removes the rear view of front-end case, bonnet and pcb board；
Fig. 4 remove on front-end case and bonnet, core of pressure meter lid and pcb board after one of front view；
Fig. 5 remove on front-end case and bonnet, core of pressure meter lid and pcb board after front view two；
Fig. 6 removes on front-end case and bonnet, core of pressure meter the rear view after lid and pcb board；
After Fig. 7 removes front-end case and bonnet, core of pressure meter up/down lid and pcb board rear view；
Fig. 8 removes the front view after front-end case and bonnet, core of pressure meter up/down lid；
The double spacing digital pressure gauge forward direction explosive view of Fig. 9；
The double spacing digital pressure gauge backlash figure of Figure 10.
Label declaration：
1 front-end case 2 bonnet
3 scale panel 4 threshold pression pointer
5 observed pressure pointer 6 pressure upper limit pointer
7 five core aviation socket 8 spring pipe joint
9 C-spring pipe 10 threshold pression preparatory function button L
11 pressure upper limit preparatory function button R 12 reduces function button Dn
13 increase function button Up 14 2.4G antenna pedestals
15 2.4G mast 16 pcb board
17 stepper motor driver chip 18 wireless singlechip
19 magnetic displacement detection chip 20 are shaken hands
21 core of pressure meter guide pile 22 stepper motor coil output pin
23 permanent magnet 24 bourdon tube hinge
25 arc pull bar 26 displacement rotation dish
Cover on 27 location hole 28 core of pressure meter
29 core of pressure meter lower cover 30 attacker
31 pawl 32 bar-shaped trough
33 upper bearing (metal) 34 lower bearing
35 observed pressure pointer driving stepper assemblies
36 pressure upper limit pointer driving stepper assemblies
37 threshold pression pointer driving stepper assemblies
38 liner plates
39 displacement rotation dish support shaft 40 lower bearing embeds stepped hole
41 upper bearing (metal) embedded hole seat 42 magnetic induction hole
43 liner plate support 44 liner plate location hole
45 upper limit pointer driving shaft 46 surveys pointer driving shaft
47 lower limit pointer driving shaft
Specific embodiment
The double spacing digital pressure gauge of the present invention as shown in Figures 1 to 10, illustrates the concrete reality of the present invention below in conjunction with the accompanying drawings
Apply mode.
A kind of double spacing digital pressure gauge, by shell, spring tube portion, double spacing digital pressure gauge movement three part group
Become, described casing part includes, front-end case 1, bonnet 2, attacker 30, pawl 31, scale panel 3, threshold pression pointer 4,
Observed pressure pointer 5, pressure upper limit pointer 6, threshold pression preparatory function button L 10, pressure upper limit preparatory function button R
11st, reduce function button Dn 12, increase function button Up 13,2.4G antenna pedestal 14,2.4G mast 15 and five core aviations to insert
Seat 7, described spring tube portion includes spring pipe joint 8, C-spring pipe 9, bourdon tube hinge 24, arc pull bar 25, its feature
It is：
Described double spacing digital pressure gauge core part includes lid 28 and core of pressure meter on pcb board 16 and core of pressure meter
The part of encapsulation in the circular shell that lower cover 29 is overlapped, described is encapsulated under lid 28 and core of pressure meter on core of pressure meter
Lid 29 in part include displacement rotation dish 26, handle 20, displacement rotation dish support shaft 39, permanent magnet 23, upper bearing (metal) 33 and under
Bearing 34, liner plate 38, observed pressure pointer driving stepper assemblies 35, pressure upper limit pointer driving stepper assemblies
36th, threshold pression pointer drives and uses stepper assemblies 37；
Described pcb board 16 is the quadrangle of four sideband radians, has magnetic induction hole 42 and four location holes 27, pcb board thereon
It is pasted with 16 and support the wireless singlechip 18 of ZigBee2006 protocol stack, the stepper motor driver chip segmenting for step pitch
17th, magnetic displacement detection chip 19, pcb board 16 is connected with four spud piles on bonnet 2 by screw；
One bar-shaped trough 32 is had on described core of pressure meter lower cover 29, the center of displacement rotation dish 26 is propped up with displacement rotation dish
Support axle 39 is connected, and the handle 20 that displacement rotation dish 26 is stretched out is connected through bar-shaped trough 32 with one end of arc pull bar 25, and arc draws
The other end of bar 25 is connected with the bourdon tube hinge 24 of the free end of C-spring pipe 9, the other end of C-spring pipe 9 and bourdon tube
Joint 8 is connected, and described displacement rotation dish support shaft 39 is socketed with a upper bearing (metal) 33 and a lower bearing 34, its upper bearing (metal)
33 are fixedly mounted in the upper bearing (metal) embedded hole seat 41 of liner plate 38, and lower bearing 34 is fixedly mounted under core of pressure meter lower cover 29
Bearing embeds in stepped hole 40, and one end of described displacement rotation dish support shaft 39 embeds one piece of foursquare permanent magnet 23, position
Transfer Moving plate support shaft 39 passes through the lower bearing of core of pressure meter lower cover 29 to stretch to the magnetic induction of pcb board 16 after embedding stepped hole 40
Hole 42, the circular magnetic susceptibility part of its magnetic displacement detection chip 19 just mounts at aligned magnetic sensing hole 42, but does not contact, C-shaped
When bourdon tube 9 occurs elastic deformation displacement, by bourdon tube hinge 24, arc pull bar 25, handle 20 drive displacement rotation dish 26
Rotate, so that the permanent magnet 23 in embedded displacement rotation dish support shaft 39 is also deflected, the circular magnetic of magnetic displacement detection chip 19
Non-sensitive part can detect the change in magnetic flux density amount parallel to chip surface, the output of described magnetic displacement detection chip 19
Pin is connected with the I/O port of wireless singlechip 18；
It is to be noted that the cross section of described C-spring pipe is ringwise, the pressure of the medium of measurement acts on C-spring pipe
Inner side, the annular interface of such C-spring pipe will tend to circular in the presence of pressure medium, form certain Zernike annular polynomial,
So that the free end that C-spring Guan Qi is not fixed, deform at bourdon tube hinge 24 extension, the size of its deformation
Pressure size depending on measured medium in C-spring pipe；
Four core of pressure meter guide piles 21 are had on described core of pressure meter lower cover 29, is inserted directly into during installation on pcb board 16
Four location holes 27 in, described observed pressure pointer driving stepper assemblies 35 be arranged on liner plate 38 on,
Pressure upper limit pointer driving stepper assemblies 36 and threshold pression pointer driving stepper assemblies 37 are then arranged on lining
On the another side of plate 38, observed pressure pointer 5 is arranged on the actual measurement pointer of observed pressure pointer driving stepper assemblies 35
In drive shaft 46, the upper limit pointer that pressure upper limit pointer 6 is arranged on pressure upper limit pointer driving stepper assemblies 36 drives
On axle 45, threshold pression pointer 4 is arranged on the lower limit pointer driving shaft 47 of threshold pression pointer driving stepper assemblies 37
On, three drive shafts are concentrically nested, but no interfere, and the respective stepper motor coil of above-described three stepper assemblies is defeated
Go out after pin 22 is each passed through core of pressure meter lower cover 29 and be weldingly fixed on pcb board 16, and by the track on pcb board 16
Road is connected with the I/O pin of micro-step motor driving chip 17 respectively, and observed pressure pointer 5 rests on scale panel 3
Position, the pressure of as current instruction.
It is respectively embedded into a touch key on four angles on described front-end case 1, be the preset work(of threshold pression respectively
Can button L 10, pressure upper limit preparatory function button R 11, minimizing function button Dn 12, increase function button Up 13.
Four liner plate location holes 44 are had on described liner plate 38, is fixed by screws in the liner plate of core of pressure meter lower cover 29
On support 43.
On described circular core of pressure meter, lid 28 has four attackers 30, and circular core of pressure meter lower cover 29 has four
Pawl（31）, after on core of pressure meter, lid 28 is overlapped with core of pressure meter lower cover 29, four attackers 30 just tangle four pawls
31, so that lid 28 and core of pressure meter lower cover 29 on core of pressure meter is connected.
During work, the screw thread that double spacing digital pressure gauges pass through on its spring pipe joint 8 is connected with pressure pipe network, double spacing
The indicated scale on scale panel 3 of the observed pressure pointer 5 of digital pressure gauge, reflection is working media in current pipe network
Real-time pressure, observed pressure pointer 5 should swing deflection between set threshold pression pointer 4 and pressure upper limit pointer 6,
Wireless singlechip 18, by the relative position according to observed pressure pointer 5 and threshold pression pointer 4 and pressure upper limit pointer 6, passes through
The spi bus that five core aviation sockets 7 are constituted, send corresponding control instruction to frequency converter and other control device, in real time to protect
In card pipe network, the pressure of working media maintains interval interior, the realization perseverance of threshold pression pointer 4 and pressure upper limit pointer 6 defined
Voltage-controlled system.
It is to be noted that the substantial improvements of the present invention also include, due to the pulse characteristic of working media, traditional electricity connects
During the work of point pressure table, the vibrations of pointer are larger, and this is very harmful for the generally pressure gauge using weak hairspring structure
, when particularly movable contact pointer limits over/under and swings near pointer, between two electric contacts, it is also possible to produce electric spark, long
Phase then leads to the galvano-cautery between electric contact.And in the present invention, can effectively improve the arteries and veins of pointer by the method for digital filtering
Dynamic characteristic, due to observed pressure pointer 5 and threshold pression pointer 4, pressure upper limit pointer 6 is contactless connection, so also do not exist
Spark eroding between electric contact, its strong antijamming capability, life-span length.
In the present invention, wireless communication mechanisms include the wireless singlechip 18 of embedded ZigBee2006 release protocol stack, front
Top on end housing 1 is provided with the 2.4G antenna pedestal 14 of a support ZigBee wireless communication LAN and is attached thereto
2.4G mast 15.Described ZigBee is one group of relevant networking developed based on IEEE802.15.4 wireless standard, peace
Technical standard that is complete and applying, its wireless singlechip 18 combines high performance 2.4GHz DSSS (DSSS) radio frequency
Transceiver core, therefore, detected pipeline pressure data also can be by the radio communication LAN based on Zigbee protocol
Network sends, and has the features such as low cost of manufacture, operation small power consumption so as to pressure monitoring terminal is different from traditional wireless biography
Sense node, has data display and preprocessing function, can effectively reduce the data throughout of wireless network, work as wireless network
When meeting with congestion, monitoring terminal remains able to independent operating, completes to partial region data collection and monitoring.Its meaning is,
Each double spacing digital pressure gauge all can automatic network-building, constitute industrial Internet of Things wireless local and control one of net pressure monitor
Node.
Outside supporting ZigBee wireless communication protocol stack, double spacing digital pressure gauges also support wired SPI simultaneously
High-speed serial bus are so as to have universality.For this reason, installing one five at the lower left side in dead ahead on described front-end case 1
Core aviation socket 7, the pin definition of core aviation socket 7 is respectively power supply VCC, ground wire GND, clock signal SCLK, data output
SDO, enable signal CS, described above five pins are corresponding with the pin of wireless singlechip 18 respectively to be connected.
It is to be noted that described magnetic displacement detection chip 19 is the single-chip integration electricity using planar Hall sensing technology
Road, its chip is made up of two parts, and circular portion is magnetic induction part, and rectangle part is signal condition part, and it can detect
To the change in magnetic flux density leading to due to permanent magnet rotation parallel to chip surface, and can achieve automatic benefit during temperature drift
Repay, the very high digital absolute displacement signal of the degree of accuracy is exported by its pin, this signal is delivered in wireless singlechip 18, thus
The deformation displacement amount of C-spring pipe 9 can accurately be detected, wireless singlechip 18 passes through software digital filter and engineering change of variable,
This displacement is converted into observed pressure pointer driving stepper assemblies 35 under current pressure drives needle pivot deflection required
Step angle, this signal deliver to step pitch subdivision stepper motor driver chip 17, direct drive observed pressure pointer drive use
The coil pin of stepper assemblies, observed pressure pointer 5 will indicate the number pressure of work at present medium on scale panel 3
According to having with low cost, the high feature of certainty of measurement.
In the present invention, its observed pressure pointer drives and is driven with stepping electricity with stepper assemblies 35, pressure upper limit pointer
Thermomechanical components 36 and threshold pression pointer drive and use stepper assemblies 37, actually employ another invention of inventor specially
Sharp technology, i.e. concentric three drive shaft micro-step motors（The patent No.：ZL201010299613.1）, when being embodied as, by this
Each drive shaft assembly of patent of invention is arranged on liner plate 38.
In sum, double spacing digital pressure gauge design proposed by the invention, is a kind of brand-new digital pressure
Table phenotype, is in place of its novelty, employs a kind of double spacing digital pressure gauge movement, takes the lead in wireless singlechip, magnetic induction
Shift technique, stepper motor driven digitlization many pointers instruction technology and high-speed figure bus communication technology integrally combine, that is,
Ductwork pressure can be measured, can implement to control again, support Zigbee protocol and the high-speed synchronous string of wireless communication LAN simultaneously
Row communication bus SPI protocol, structure and principle eliminate the moulds such as the hairspring being easily damaged in traditional electro connecting pressure gauge completely
Intend damped part and the mechanical speed-control device of up/down limits pressure pointer and magnetic helps electric contact set, no electric contact, its pressure upper limit
Pointer and threshold pression pointer all can key-press programmable set, long service life, and maintainability is good, is a brand-new electric contact number
Word pressure gauge phenotype, strong antijamming capability, good reliability, is the optimal renewal product of traditional analog electro connecting pressure gauge.
Double spacing digital pressure gauge designed by the present invention not still traditional analog electro connecting pressure gauge most preferably update
Product, actually it is also proposed the optimal case being updated transforming to existing simulated pressure table, this is because, the present invention closes
Reason remains elastic sensitive detection element part in traditional electro connecting pressure gauge, has increased the double spacing digital pressure of compact newly
Digital pressure gauge movement need only directly be replaced simulation instruction movement by table movement, the therefore transformation to existing electro connecting pressure gauge,
Existing simulation electro connecting pressure gauge can be escalated into double spacing digital pressure gauges.Importantly, this double spacing numeral
Pressure gauge, due to no electric contact, therefore can be widely applied to oil, chemical field, measurement has the various petrifaction gas of explosion danger
Body, the pressure of fluid media (medium).
Meaning of the present invention is the application on Internet of Things, and this double spacing digital pressure gauges are because change wireless sense network
The structure of network, reduces the dependence for pressure end node for the control system, thus enhancing the robustness of whole control system.
Specifically, electro connecting pressure gauge is the main test instrumentation of Industry Control scene and pipe network water supply equipment, and its digitlization is right
In the internet of things networking realizing Industry Control site pressure control node, or it is applied to large-scale distribution as a monitoring terminal
A kind of formula WLAN system, there is provided solution of low cost, can meet the pressure sensing needed for following Internet of Things
The networking requirement of node, application prospect is quite wide.
Claims (6)
1. a kind of double spacing digital pressure gauge, is made up of shell, spring tube portion, double spacing digital pressure gauge movement three part,
Described casing part includes, front-end case（1）, bonnet（2）, attacker（30）, pawl（31）, scale panel（3）, threshold pression
Pointer（4）, observed pressure pointer（5）, pressure upper limit pointer（6）, threshold pression preparatory function button L（10）, pressure upper limit pre-
Put function button R（11）, reduce function button Dn（12）, increase function button Up（13）, 2.4G antenna pedestal（14）, 2.4G antenna
Bar（15）With five core aviation sockets（7）, described spring tube portion includes spring pipe joint（8）, C-spring pipe（9）, bourdon tube
Hinge（24）, arc pull bar（25）It is characterised in that：
Described double spacing digital pressure gauge core part includes pcb board（16）And cover on core of pressure meter（28）And pressure gauge
Movement lower cover（29）The part of encapsulation in the circular shell being overlapped, described is encapsulated in lid on core of pressure meter（28）And pressure
Table movement lower cover（29）In part include displacement rotation dish（26）, handle（20）, displacement rotation dish support shaft（39）, permanent magnet
（23）, upper bearing (metal)（33）And lower bearing（34）, liner plate（38）, observed pressure pointer driving stepper assemblies（35）, the upper limit
Pressure indication driving stepper assemblies（36）, threshold pression pointer driving stepper assemblies（37）；
Described pcb board（16）For the quadrangle of four sideband radians, have magnetic induction hole thereon（42）With four location holes（27）,
Pcb board（16）On be pasted with support ZigBee2006 protocol stack wireless singlechip（18）, for step pitch subdivision stepper motor
Driving chip（17）, magnetic displacement detection chip（19）, pcb board（16）By screw and bonnet（2）On four spud piles be connected；
Described core of pressure meter lower cover（29）On have a bar-shaped trough（32）, displacement rotation dish（26）Center turn with displacement
Moving plate support shaft（39）It is connected, displacement rotation dish（26）The handle stretching out（20）Through bar-shaped trough（32）With arc pull bar（25）'s
One end is connected, arc pull bar（25）The other end and C-spring pipe（9）Free end bourdon tube hinge（24）It is connected, C-shaped bullet
Reed pipe（9）The other end and spring pipe joint（8）Connected, described displacement rotation dish support shaft（39）On be socketed with a upper shaft
Hold（33）With a lower bearing（34）, its upper bearing (metal)（33）It is fixedly mounted on liner plate（38）Upper bearing (metal) embedded hole seat（41）In,
Lower bearing（34）It is fixedly mounted on core of pressure meter lower cover（29）Lower bearing embed stepped hole（40）In, described displacement rotates
Disk support shaft（39）One end embed one piece of foursquare permanent magnet（23）, displacement rotation dish support shaft（39）Through pressure gauge machine
Core lower cover（29）Lower bearing embed stepped hole（40）After stretch to pcb board（16）Magnetic induction hole（42）, its magnetic displacement detection core
Piece（19）Circular magnetic susceptibility part just mount aligned magnetic sensing hole（42）Place, but do not contact, C-spring pipe（9）There is bullet
During property deformation displacement, by bourdon tube hinge（24）, arc pull bar（25）, handle（20）Drive displacement rotation dish（26）Rotate,
Make embedded displacement rotation dish support shaft（39）On permanent magnet（23）Also deflect, magnetic displacement detection chip（19）Circular magnetic
Non-sensitive part can detect the change in magnetic flux density amount parallel to chip surface, described magnetic displacement detection chip（19）Defeated
Go out pin and wireless singlechip（18）I/O port be connected；
Described core of pressure meter lower cover（29）On have four core of pressure meter guide piles（21）, during installation, it is inserted directly into pcb board
（16）On four location holes（27）In, described observed pressure pointer driving stepper assemblies（35）It is arranged on liner plate
（38）One side on, pressure upper limit pointer driving stepper assemblies（36）With threshold pression pointer driving stepper motor
Part（37）Then it is arranged on liner plate（38）Another side on, observed pressure pointer（5）It is arranged on observed pressure pointer driving stepping
Electric machine assembly（35）Actual measurement pointer driving shaft（46）On, pressure upper limit pointer（6）It is arranged on pressure upper limit pointer driving step
Stepper motor assembly（36）Upper limit pointer driving shaft（45）On, threshold pression pointer（4）It is arranged on threshold pression pointer and drive use
Stepper assemblies（37）Lower limit pointer driving shaft（47）On, three drive shafts are concentrically nested, but no interfere, above-described
The respective stepper motor coil output pin of three stepper assemblies（22）It is each passed through core of pressure meter lower cover（29）After weld
Connect and be fixed on pcb board（16）On, and pass through pcb board（16）On printed wiring respectively with micro-step motor driving chip（17）
I/O pin be connected, observed pressure pointer（5）Rest on scale panel（3）On position, the pressure of as current instruction.
2. double spacing digital pressure gauge according to claim 1 it is characterised in that：Described front-end case（1）On four
One touch key is respectively embedded on individual angle, is threshold pression preparatory function button L respectively（10）, pressure upper limit preparatory function presses
Key R（11）, reduce function button Dn（12）, increase function button Up（13）.
3. double spacing digital pressure gauge according to claim 1 it is characterised in that：Described front-end case（1）On top
End is provided with the 2.4G antenna pedestal of the Zigbee protocol of a support wireless communication LAN（14）, and with 2.4G mast
（15）It is connected.
4. double spacing digital pressure gauge according to claim 1 it is characterised in that：Described front-end case（1）On just before
One five core aviation socket is installed at the lower left side of side（7）, five core aviation sockets（7）Pin definition be respectively power supply VCC,
Line GND, clock signal SCLK, data output SDO, enable signal CS, described above five pins respectively with wireless singlechip
（18）Pin corresponding be connected.
5. double spacing digital pressure gauge according to claim 1 it is characterised in that：Described liner plate（38）On have four linings
Plate location hole（44）, it is fixed by screws in core of pressure meter lower cover（29）Liner plate support（43）On.
6. double spacing digital pressure gauge according to claim 1 it is characterised in that：Cover on described circular core of pressure meter
（28）There are four attackers（30）, the core of pressure meter lower cover of circle（29）On have four pawls（31）, core of pressure meter covers
（28）With core of pressure meter lower cover（29）After overlapping, four attackers（30）Just tangle four pawls（31）, make core of pressure meter
Upper lid（28）With core of pressure meter lower cover（29）It is connected.
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| CN109540378A (en) * | 2018-12-20 | 2019-03-29 | 安徽天康(集团)股份有限公司 | A kind of distance type pressure gauge with monitoring function |
| CN110657912A (en) * | 2019-09-20 | 2020-01-07 | 慈溪市普莱斯仪表有限公司 | Gas indicator spring tube and manufacturing method thereof |
| CN114061800A (en) * | 2021-11-15 | 2022-02-18 | 红旗仪表（长兴）有限公司 | Optical fiber induction type electric contact pressure gauge |
| CN114612648A (en) * | 2022-03-07 | 2022-06-10 | 广州计量检测技术研究院 | Pointer type pressure gauge indication value reading method and device based on trusted AI |
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| CN114612648A (en) * | 2022-03-07 | 2022-06-10 | 广州计量检测技术研究院 | Pointer type pressure gauge indication value reading method and device based on trusted AI |
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| CN106441693B (en) | 2019-02-19 |
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Effective date of registration: 20240417 Address after: 315400, 737-2 Xinjian North Road, Yuyao City, Ningbo City, Zhejiang Province (self declared) Patentee after: YUYAO KINGTAI INSTR Co.,Ltd. Country or region after: China Address before: 410003 Hunan province Changsha Kaifu District Sifangping teachers village 5 Building No. 402 Patentee before: Peng Xinan Country or region before: China |