CN105319002A - Natural ventilation pressure measuring instrument - Google Patents
Natural ventilation pressure measuring instrument Download PDFInfo
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- CN105319002A CN105319002A CN201510838709.3A CN201510838709A CN105319002A CN 105319002 A CN105319002 A CN 105319002A CN 201510838709 A CN201510838709 A CN 201510838709A CN 105319002 A CN105319002 A CN 105319002A
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- measuring instrument
- sensor
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- ventilation
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Abstract
The invention relates to an independent cavity natural ventilation pressure measuring instrument. The independent cavity natural ventilation pressure measuring instrument includes a base, a lantern ring, a tube, a lead wire, and a wire outlet aviation plug; the base is internally provided with an oil charging pipeline; the right side of the base is provided with the tube, and the base is connected to the tube by the lantern ring; a sensor is arranged within the lantern ring; an oil charging cavity is arranged between the sensor and the base; the rear side of the sensor is provided with a circuit board, and the oil charging cavity passes through the sensor, and then is connected to the circuit board; the outer edge of the circuit board is provided with sealing insulation paste; one end of the lead wire is connected to the circuit board, and the other end of the lead wire is connected to the wire outlet aviation plug. According to the invention, secondary pollution of measuring media can be avoided by adoption of an independent ventilation cavity, and washing and cleaning of a sanitary occasion can be assured by adoption of a primary oil charging structure; an external ventilation structure of the sensor, and a two-channel ventilation design of a polymer ventilation plug and a polymer ventilation film can assure natural ventilation and can effectively prevent moisture condensation and moisture leakage; the influence of moisture on the performances of the natural ventilation pressure measuring instrument can be avoided by adoption of a ventilation and circuit board isolation design; a whole sealing structure within the circuit board can assure a long and reliable operation of the circuit board, and the natural ventilation pressure measuring instrument is suitable for operations in various environments.
Description
Technical field
The present invention relates to a kind of food and pharmaceutical industry pressure sensor technique field, is that one needs CIP to clean specifically, high-temperature sterilization, during the operations such as external high pressure water cleaning, and a kind of individual cavity natural permeable pressure-measuring instrument of use.
Background technology
Pressure-measuring instrument has another name called pressure transducer, is a kind of sensor the most conventional in industrial practice, instrument and meter control.Be widely used in various industrial automatic control environment, relate to numerous industries such as Aero-Space, military project, water conservancy traffic, factory automation, industrial flow robotization, intelligence equipment.
There is following defect in the pressure-measuring instrument that market uses at present: 1, electronic circuit cavity and sensor cavity of breathing freely is communicated with, once sensor diaphragm is damaged, measuring media will be subject to the pollution of electronic circuit cavity, may cause serious food or drug safety accident.2, the oil-filled structure of secondary, easily hides dirt after exposed oil-filled hole Long-Time Service, is unfavorable for clean cleaning.3, adopt internal sensor ventilating structure, need be drawn ventilative for sensor by silicone tube, be unfavorable for that the full dosing technology of wiring board runs.4, the silica gel of embedding easily causes permeability cell to block, and affects surveying instrument precision.Patent of the present invention efficiently solves this problem.
Summary of the invention
For above-mentioned situation, the invention provides a kind of individual cavity natural permeable pressure-measuring instrument, first; there is independent ventilative chamber; just in case sensor diaphragm is damaged, it effectively can enter electronics chamber by medium, the not contaminated and electron device of available protecting measuring media safe and reliable.The second, internal sensor is oil-filled structure once, and meet hygiene-type occasion and use, surface clean is fast easy to clean.3rd, sensor carries outside ventilating structure, and use the ventilative design of the two pass of macromolecule breather plug and gas permeable polymer film, natural permeable, effectively can prevent again condensation, aqueous vapor seepage.Breathe freely and line plate isolation design, avoid aqueous vapor on the impact of its performance.4th, the inner full embedding structure of wiring board, ensures the operation reliably and with long-term of its wiring board, and the use be suitable under various varying environment runs.5th; wiring board employing arm low power consumption control device is the circuit that the intelligent parametric calibrations of 485 buses of core combine with high/low temperature bucking-out system; and man-machine interface is processed especially, ensure that carry out low-power consumption global function compensation for calibrating errors by 485 buses ensures high-precisionly to add following circuit design simultaneously: 1, there is analog voltage 0 ~ 5VDC or electric current 0 ~ 20mA output function simultaneously; 2, there is miniaturization secondary lightening surge preventing and the overvoltage crowbar of innovation; practical function: while onesize with foreign well-known product; power supply and output signal port Anti-surging performance index reach: GBT17626.5:3 level level; dielectric voltage withstand can meet product Standard (500VDC) simultaneously; there is overvoltage simultaneously; overcurrent, the function such as anti-reverse.3, have NMOS and switching pmos output signal, control power consumption little, controlling electric current can reach 0.2A; 4, fluid temperature can be surveyed simultaneously.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of individual cavity natural permeable pressure-measuring instrument, comprise pedestal, the collar, body, lead-in wire and outlet air plug, oil-filled pipeline is provided with in pedestal, body is provided with on the right side of pedestal, described pedestal is connected by the collar with between body, collar inside is located at by described sensor, oil-filled chamber is provided with between sensor and pedestal, sensors back side is provided with wiring board, oil-filled chamber is by being connected to wiring board through sensor, described wiring board outer rim is provided with the insulating gel of sealing, and described lead-in wire one end is connected with wiring board, and the other end is connected with outlet air plug.
The described collar is provided with ventilative chamber, and ventilative chamber is provided with the ventilative design of two pass of macromolecule breather plug and gas permeable polymer film.
Also comprise control circuit, described control circuit comprises microminiaturized EMC circuit, pressure and temperature metering circuit, man-machine interface and imput output circuit.
Silicone oil is provided with in described oil-filled chamber.
Described microminiaturized EMC circuit comprises gas-discharge tube GDT1, F fuse, TVS pipe, diode D1, electric capacity C, inductance L, resistance R, power supply magnetic bead FB.Described GDT1 is up to the withstand voltage gas-discharge tube of 1000V, realizes the product Standard of dielectric voltage withstand 500V.Gas-discharge tube GDT, F fuse, TVS pipe, electric capacity C are combined into 2 grades of Anti-surging structures.D1 realizes anti-reverse connection function, and electric capacity C, inductance L, resistance R and power supply magnetic bead FB realize EFT filter function.
Described man-machine interface and imput output circuit are man-machine interface and the imput output circuit of low-power consumption ARM core, integrated 24 the analog to digital converter ADC of Arm core and 12 figure place weighted-voltage D/A converter DAC; Voltage output metal-oxide-semiconductor realizes large current load and drives; current output voltage scope widelyr can reach 30V to power supply-2.1V(service area); switching output section is exported by the switch of configurable NMOS and the PMOS of film dancing; and there is over-voltage over-current protection; output switch parameter interface has control latch function; even if MCU failure reset also can not cause switch mis-jumping to move; powerful robust performance; 485 output interfaces more can reach 200 same sensor nodes and network simultaneously, facilitate Internet of Things environmental protection observing and controlling.
Advantage of the present invention is: adopt once oil-filled structure, and meet the clean use of hygiene-type occasion cleaning, sensor carries outside ventilating structure, and the ventilative design of design two pass, natural permeable, effectively can prevent again condensation, aqueous vapor seepage.Breathe freely and line plate isolation design, avoid aqueous vapor on the impact of its performance.The inner full embedding structure of wiring board, ensures the operation reliably and with long-term of its wiring board, and the use be suitable under various varying environment runs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the circuit diagram of microminiaturized EMC circuit of the present invention.
Fig. 3 is connection circuit figure in pressure and temperature metering circuit of the present invention.
Imput output circuit of the present invention when Fig. 4 is 0 ~ 5V/0 ~ 10V.
Man-machine interface of the present invention and imput output circuit when Fig. 5 is 4 ~ 20mA/0 ~ 20MA.
Fig. 6 is ARM nucleus module circuit diagram.
Fig. 7 is the circuit diagram of the switch module that interface latches.
Fig. 8 is the circuit diagram of 485 output interfaces.
In the drawings: 1-pedestal, 2-dielectric cavity, 3-macromolecule breather plug, 4-gas permeable polymer film, 5-sensor, the 6-collar, 7-wiring board, 8-insulating gel, 9-body, 10-goes between, 11-outlet air plug, and 12-breathes freely chamber.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See a kind of individual cavity natural permeable of Fig. 1 pressure-measuring instrument, comprise pedestal, the collar, body, lead-in wire and outlet air plug, oil-filled pipeline is provided with in pedestal, body is provided with on the right side of pedestal, described pedestal is connected by the collar with between body, collar inside is located at by described sensor, oil-filled chamber is provided with between sensor and pedestal, sensors back side is provided with wiring board, oil-filled chamber is by being connected to wiring board through sensor, described wiring board outer rim is provided with the insulating gel of sealing, and described lead-in wire one end is connected with wiring board, and the other end is connected with outlet air plug.
The described collar is provided with independent ventilative chamber, and ventilative chamber is provided with macromolecule breather plug and gas permeable polymer film.
Also comprise control circuit, described control circuit comprises microminiaturized EMC circuit, pressure and temperature metering circuit, man-machine interface and imput output circuit.
Described microminiaturized EMC circuit comprises gas-discharge tube GDT1, GDT2, GDT3, F fuse, TVS pipe, diode D1, electric capacity C, inductance L, resistance R, power supply magnetic bead FB.Described GDT1, GDT3 are up to the withstand voltage glass gas-discharge pipe of 1000V, realize the product Standard of dielectric voltage withstand 500V.Gas-discharge tube GDT, F fuse, TVS pipe, electric capacity C are combined into 2 grades of Anti-surging structures.D1 realizes anti-reverse connection function electric capacity C, inductance L, resistance R and power supply magnetic bead FB and realizes EFT filter function.
Described man-machine interface and imput output circuit are man-machine interface and the imput output circuit of low-power consumption ARM core, integrated 24 the analog to digital converter ADC of Arm core and 12 figure place weighted-voltage D/A converter DAC; Voltage output metal-oxide-semiconductor realizes large current load and drives; current output voltage scope widelyr can reach 30V to power supply-2.1V(service area); switching output section is exported by the switch of configurable NMOS and the PMOS of film dancing; and there is over-voltage over-current protection; output switch parameter interface has control latch function; even if MCU failure reset also can not cause switch mis-jumping to move; powerful robust performance; 485 output interfaces more can reach 200 same sensor nodes and network simultaneously, facilitate Internet of Things environmental protection observing and controlling.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and instructions; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain of application claims is defined by appending claims and equivalent thereof.
Claims (7)
1. an individual cavity natural permeable pressure-measuring instrument, it is characterized in that, comprise pedestal, the collar, body, lead-in wire and outlet air plug, oil-filled pipeline is provided with in pedestal, body is provided with on the right side of pedestal, described pedestal is connected by the collar with between body, collar inside is located at by described sensor, oil-filled chamber is provided with between sensor and pedestal, sensors back side is provided with wiring board, and oil-filled chamber is by being connected to wiring board through sensor, and described wiring board outer rim is provided with the insulating gel of sealing, described lead-in wire one end is connected with wiring board, and the other end is connected with outlet air plug.
2. individual cavity natural permeable pressure-measuring instrument according to claim 1, is characterized in that, the described collar is provided with independent ventilative chamber, and ventilative chamber is provided with gas permeable polymer plug and gas permeable polymer film.
3. individual cavity natural permeable pressure-measuring instrument according to claim 1, is characterized in that, also comprise control circuit, and described control circuit comprises microminiaturized EMC circuit, pressure and temperature metering circuit, man-machine interface and imput output circuit.
4. individual cavity natural permeable pressure-measuring instrument according to claim 1, is characterized in that, be provided with silicone oil in described oil-filled chamber.
5. individual cavity natural permeable pressure-measuring instrument according to claim 1, it is characterized in that, described microminiaturized EMC circuit comprises glass gas-discharge pipe GDT1, GDT3, F fuse, TVS pipe, diode D1, electric capacity C, inductance L, resistance R, power supply magnetic bead FB, ceramic gas discharge tube GDT2, F fuse, TVS pipe, electric capacity C are combined into 2 grades of Anti-surging structures.
6. individual cavity natural permeable pressure-measuring instrument according to claim 5, is characterized in that, described GDT1, GDT3 are up to the withstand voltage glass gas-discharge pipe of 1000V.
7. individual cavity natural permeable pressure-measuring instrument according to claim 3, it is characterized in that, described interface and imput output circuit are the imput output circuit of low-power consumption ARM core, comprise ARM nucleus module circuit, interface latches switch module circuit, 485 output interface circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838709.3A CN105319002A (en) | 2015-11-27 | 2015-11-27 | Natural ventilation pressure measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838709.3A CN105319002A (en) | 2015-11-27 | 2015-11-27 | Natural ventilation pressure measuring instrument |
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| CN105319002A true CN105319002A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510838709.3A Pending CN105319002A (en) | 2015-11-27 | 2015-11-27 | Natural ventilation pressure measuring instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062967A (en) * | 2016-11-09 | 2018-05-22 | 加特可株式会社 | The reply moisture condensation construction of sensor |
| CN113340516A (en) * | 2021-06-07 | 2021-09-03 | 中国工程物理研究院总体工程研究所 | Pressure measuring cell |
| CN114166404A (en) * | 2021-11-04 | 2022-03-11 | 无锡赛恩诺测控科技有限公司 | Novel pore air pressure measuring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062967A (en) * | 2016-11-09 | 2018-05-22 | 加特可株式会社 | The reply moisture condensation construction of sensor |
| CN113340516A (en) * | 2021-06-07 | 2021-09-03 | 中国工程物理研究院总体工程研究所 | Pressure measuring cell |
| CN114166404A (en) * | 2021-11-04 | 2022-03-11 | 无锡赛恩诺测控科技有限公司 | Novel pore air pressure measuring system |
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Application publication date: 20160210 |
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