CN204924369U - Differential pressure type level gauge - Google Patents
Differential pressure type level gauge Download PDFInfo
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- CN204924369U CN204924369U CN201520519341.XU CN201520519341U CN204924369U CN 204924369 U CN204924369 U CN 204924369U CN 201520519341 U CN201520519341 U CN 201520519341U CN 204924369 U CN204924369 U CN 204924369U
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- differential pressure
- level gauge
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- Measuring Fluid Pressure (AREA)
Abstract
Differential pressure type level gauge includes: solar energy supply circuit, differential pressure pressure integral type sensor, AD conversion unit, central processing unit CPU, detecting light intensity unit, temperature detecting element, bluetooth, display, heating control unit, when the built -in liquid medium of container, at container bottom surface and liquid level production differential pressure triangle P, it concerns with high h of liquid and medium density rho as follows: triangle P=h rho. When the timing of medium density, the liquid level is directly proportional with the differential pressure. The differential pressure converts the differential pressure signal of telecommunication into with the aid of differential pressure sensor, enlargies through the amplifier, and rethread adc be data signal with analog signal transition, sends into central processing unit CPU, floats reviewing, time floats and carry out the automatic correction. Then convert into required liquid level and volume through operating with differential pressure signal, show through the display at last. Because overvoltage protection's effect can not produce the sensor when the any one end excessive pressure of sensor and damage.
Description
[technical field]
The utility model relates to the liquid level of cryogenic tank and pressure and display, is a kind of high-performance differential pressure type level gauge.
[background technology]
Traditional differential pressure type level gauge divides mechanical type and electronic type: the few precision of mechanical type display parameter is low; Electronic type needs power lead.
[utility model content]
The purpose of this utility model provides a kind of differential pressure type level gauge, has higher measuring accuracy.Differential pressure type level gauge, its principle is when container content liquid medium, produces differential pressure △ P at container bottoms and liquid level, it and liquid height h and the following relation of Media density ρ: △ P=h ρ.When Media density one timing, liquid level is directly proportional to differential pressure.Differential pressure is converted to differential pressure electric signal by means of differential pressure pick-up, amplified by amplifier, then by analog to digital converter simulating signal is converted to digital signal send into microcomputer and carry out error that various interference brings and temperature drift, time drift equal error auto modification.Then by computing, differential pressure signal is converted into required liquid level and volume, shows finally by display.
The technical solution of the utility model is as follows:
Differential pressure type level gauge comprises circuit part and structure division, it is characterized in that:
Circuit part is: solar cell (1) connects solar recharging administrative unit (2), solar recharging administrative unit (2) connects energy-storage battery (3), solar recharging administrative unit (2) also connects power supply administrative unit (4), above-mentioned functions block composition feed circuit (5), differential pressure pressure integral sensor (6) connects AD conversion unit (7), AD conversion unit (7) connects central processor CPU (8), light-intensity test unit (9) connects central processor CPU (8), temperature detecting unit (10) connects central processor CPU (8), bluetooth (11) connects central processor CPU (8), central processor CPU (8) connects display (12), central processor CPU (8) also connects heat control unit (13), heat control unit (13) connects display (12), above-mentioned functions block composition function circuit (14), power supply administrative unit (4) linkage function circuit (14),
Structure division is: on differential pressure type level gauge shell (101), paste perspex panels (109), differential pressure type level gauge shell (101) has display (12), and touch key-press film (115) is attached on perspex panels (109); Differential pressure pressure integral sensor (6) is connected with differential pressure type level gauge shell (101) by fixed screw (114), and solar cell (1) is arranged on the upper surface at differential pressure pressure integral sensor (6) top; Temperature detecting unit (10), energy-storage battery (3), display (12) are arranged on circuit board (106), circuit board (106) is fixed in differential pressure type level gauge shell (101) by screw (105), macromolecule sieve (113) is arranged on differential pressure type level gauge shell (101), and liquid crystal heating film (108) is attached to display (12) back side.
Described differential pressure type level gauge, is characterized in that: the display that display (12) shows for liquid crystal digital.Displaying contents has: liquid level, volume, weight, pressure, battery electric quantity, bluetooth connection status, 4mA to 20mA output state.Display mode has: Circulating fibrocytes, appointment display, intelligent display, triggering display.
Described differential pressure type level gauge, it is characterized in that: solar recharging administrative unit (2) selects solar recharging managing chip, charging energy-storing is carried out to energy-storage battery (3), this differential pressure type level gauge is powered and is powered by feed circuit (5) completely, without the need to external any energy, and realize running reliably and with long-term;
Described differential pressure type level gauge, is characterized in that: differential pressure type level gauge seals completely, but by macromolecule sieve (113) ventilation, this design can ensure differential pressure type level gauge waterproof and breathable.
Described differential pressure type level gauge, is characterized in that: differential pressure type level gauge match connecting communication by bluetooth (11) and mobile phone, carries out the work such as tank body optimum configurations, bound warning setting, zero compensation.
Described differential pressure type level gauge, it is characterized in that: light-intensity test unit (9) has photoresistance (107), central processor CPU (8) carries out analyzing and processing by light-intensity test unit (9) to light intensity, open or close the backlight of display (12), to save the energy that the energy and Appropriate application solar cell (1) absorb in good time.
Described differential pressure type level gauge, is characterized in that: central processor CPU (8) carries out software algorithm compensation by the temperature of monitoring differential pressure pressure integral sensor (6) to collection pressure.
Described differential pressure type level gauge, is characterized in that: be integral type core body in the inner analog to digital conversion part of AD conversion unit (7) and amplifier section, reduces and avoids external circuit to disturb.
Described differential pressure type level gauge, it is characterized in that: heat control unit (13) has liquid crystal heating film (108), central processor CPU (8) is by temperature detecting unit (10) monitoring of environmental temperature, when low temperature, carry out heating temperatures compensation by the liquid crystal of heat control unit (13) to display (12), solve the problem of the liquid crystal operation irregularity at low temperatures of display (12).
Differential pressure type level gauge circuit part principle of work is summarized:
1, feed circuit (5) function is as follows:
A) when solar cell (1) converting electrical energy is sufficient, there is provided electric energy first to power supply administrative unit (4) by solar recharging administrative unit (2), wherein power supply administrative unit (4) function is powered to functional circuit (14); Then the unnecessary power storage changed by solar cell (1) of solar recharging administrative unit (2) is for subsequent use in energy-storage battery (3).
B) when solar cell (1) converting electrical energy is inadequate, solar recharging administrative unit (2) stops charging to energy-storage battery (3), and energy-storage battery (3) provides electric energy to power supply administrative unit (4), the electric energy that now solar cell (1) is changed all is supplied to power supply administrative unit (4), and namely solar cell (1) and energy-storage battery (3) provide electric energy to power supply administrative unit (4) simultaneously.
C) when solar cell (1) is without converting electrical energy, solar recharging administrative unit (2) quits work, and now energy-storage battery (3) provides electric energy to power supply administrative unit (4).
2, functional circuit (14) function is as follows:
Differential pressure pressure integral sensor, differential pressure type level gauge adopts differential pressure pressure integral sensor, can export differential pressure and pressure signal simultaneously.Reservoir bottom and top pressure are transformed to voltage signal by differential pressure pressure integral sensor (6), are amplified by AD conversion unit (7) and are converted to digital signal, finally pass to central processor CPU (8); Central processor CPU (8) is by the pressure information of voltage process obtained and calculated the height of storage tank inside liquid level by certain algorithm, then sends into display (12) and shows.Differential pressure type level gauge employing dominant frequency is the low-power consumption central processor CPU (8) of 4M, and can calculate 2000 altitude informations p.s., after completing sampling process, central processor CPU (8) carries out temperature compensation correction to image data.
A) central processor CPU (8) is by light-intensity test unit (9) testing environment light intensity, when light intensity exceedes factory setting value, central processor CPU (8) closes display (12) backlight, to save electric energy; When light intensity is lower than factory setting value, central processor CPU (8) opening display (12) backlight.
B) central processor CPU (8) is by temperature detecting unit (10) testing environment temperature, when temperature is lower than subzero 30 DEG C, central processor CPU (8) is heated to display (12) by heat control unit (13), under solving low temperature environment, the problem of liquid crystal display exception.
C) central processor CPU (8) is connected by data line with bluetooth (11), can two-way access; User carries out pairing by mobile phone with bluetooth (11) and is connected, and then uses client and differential pressure type level gauge to carry out man-machine interaction; Tank body optimum configurations can be carried out to differential pressure type level gauge, bound reports to the police the work such as setting, zero compensation.
[accompanying drawing explanation]
Fig. 1 differential pressure type level gauge front view
A direction skeleton view in Fig. 2 Fig. 1
Fig. 3 differential pressure type level gauge schematic block circuit diagram
[embodiment]
See Fig. 3, differential pressure type level gauge schematic block circuit diagram, differential pressure type level gauge comprises circuit part, it is characterized in that: circuit part is: solar cell (1) connects solar recharging administrative unit (2), solar recharging administrative unit (2) connects energy-storage battery (3), solar recharging administrative unit (2) also connects power supply administrative unit (4), above-mentioned functions block composition feed circuit (5), differential pressure pressure integral sensor (6) connects AD conversion unit (7), AD conversion unit (7) connects central processor CPU (8), light-intensity test unit (9) connects central processor CPU (8), temperature detecting unit (10) connects central processor CPU (8), bluetooth (11) connects central processor CPU (8), central processor CPU (8) connects display (12), central processor CPU (8) also connects heat control unit (13), heat control unit (13) connects display (12), above-mentioned functions block composition function circuit (14), power supply administrative unit (4) linkage function circuit (14),
Fig. 1 is differential pressure type level gauge front view, structure division is: on differential pressure type level gauge shell (101), paste perspex panels (109), differential pressure type level gauge shell (101) has display (12), touch key-press film (115) is attached on perspex panels (109), and photoresistance (107) is arranged on circuit board (106);
Fig. 2 is A direction skeleton view in Fig. 1.Differential pressure pressure integral sensor (6) is connected with differential pressure type level gauge shell (101) by fixed screw (114), and solar cell (1) is arranged on the upper surface at differential pressure pressure integral sensor (6) top; Temperature detecting unit (10), energy-storage battery (3), display (12) are arranged on circuit board (106), circuit board (106) is fixed in differential pressure type level gauge shell (101) by screw (105), and macromolecule sieve (113) is arranged on differential pressure type level gauge shell (101).
China Patent No. 201320323893.4 selected by differential pressure pressure integral sensor (6), utility model title two line three capacitive transducer tank gage; Or select China Patent No. 201320325209.6, utility model title capacitance level gauge.
When installing and using, this differential pressure type level gauge is fixed on the shell of measured liquid container, measured medium pressure is introduced from high-voltage connecting ozzle (102) and is delivered to differential pressure pick-up high-pressure side, and measured medium pressure low-pressure introduces the low pressure end being delivered to differential pressure pick-up from low pressure pressure inlet (103).Its principle is when container content liquid medium, produces differential pressure △ P at container bottoms and liquid level, it and liquid height h and the following relation of Media density ρ: △ P=h ρ.When Media density one timing, liquid level is directly proportional to differential pressure.Differential pressure is converted to differential pressure electric signal by means of differential pressure pick-up, amplified by amplifier, then by analog to digital converter simulating signal is converted to digital signal send into microcomputer and carry out error that various interference brings and temperature drift, time drift equal error auto modification.Then by computing, differential pressure signal is converted into required liquid level and volume, shows finally by display.
Claims (6)
1. differential pressure type level gauge comprises circuit part and structure division, it is characterized in that:
Circuit part is: solar cell (1) connects solar recharging administrative unit (2), solar recharging administrative unit (2) connects energy-storage battery (3), solar recharging administrative unit (2) also connects power supply administrative unit (4), above-mentioned functions block composition feed circuit (5), differential pressure pressure integral sensor (6) connects AD conversion unit (7), AD conversion unit (7) connects central processor CPU (8), light-intensity test unit (9) connects central processor CPU (8), temperature detecting unit (10) connects central processor CPU (8), bluetooth (11) connects central processor CPU (8), central processor CPU (8) connects display (12), central processor CPU (8) also connects heat control unit (13), heat control unit (13) connects display (12), above-mentioned functions block composition function circuit (14), power supply administrative unit (4) linkage function circuit (14),
Structure division is: on differential pressure type level gauge shell (101), paste perspex panels (109), differential pressure type level gauge shell (101) has display (12), and touch key-press film (115) is attached on perspex panels (109); Differential pressure pressure integral sensor (6) is connected with differential pressure type level gauge shell (101) by fixed screw (114), and solar cell (1) is arranged on the upper surface at differential pressure pressure integral sensor (6) top; Temperature detecting unit (10), energy-storage battery (3), display (12) are arranged on circuit board (106), circuit board (106) is fixed in differential pressure type level gauge shell (101) by screw (105), macromolecule sieve (113) is arranged on differential pressure type level gauge shell (101), and liquid crystal heating film (108) is attached to display (12) back side.
2. differential pressure type level gauge according to claim 1, it is characterized in that: the display that display (12) shows for liquid crystal digital, displaying contents has: liquid level, volume, weight, pressure, battery electric quantity, bluetooth connection status, 4mA to 20mA output state; Display mode has: Circulating fibrocytes, appointment display, intelligent display, triggering display.
3. differential pressure type level gauge according to claim 1, is characterized in that: solar recharging administrative unit (2) selects solar recharging managing chip, carries out charging energy-storing to energy-storage battery (3).
4. differential pressure type level gauge according to claim 1, is characterized in that: differential pressure type level gauge seals completely, but by macromolecule sieve (113) ventilation.
5. differential pressure type level gauge according to claim 3, it is characterized in that: light-intensity test unit (9) has photoresistance (107), central processor CPU (8) carries out analyzing and processing by light-intensity test unit (9) to light intensity, open or close the backlight of display (12), to save the energy that the energy and Appropriate application solar cell (1) absorb in good time.
6. differential pressure type level gauge according to claim 1, is characterized in that: be integral type core body in the inner analog to digital conversion part of AD conversion unit (7) and amplifier section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520519341.XU CN204924369U (en) | 2015-07-16 | 2015-07-16 | Differential pressure type level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520519341.XU CN204924369U (en) | 2015-07-16 | 2015-07-16 | Differential pressure type level gauge |
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| Publication Number | Publication Date |
|---|---|
| CN204924369U true CN204924369U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520519341.XU Active CN204924369U (en) | 2015-07-16 | 2015-07-16 | Differential pressure type level gauge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576973A (en) * | 2016-02-24 | 2016-05-11 | 台州谊聚机电有限公司 | Switching power supply circuit of water pump system |
| CN105587491A (en) * | 2016-02-24 | 2016-05-18 | 台州谊聚机电有限公司 | Photovoltaic water pump system |
| CN112798466A (en) * | 2021-02-02 | 2021-05-14 | 上海朝辉压力仪器有限公司 | Multi-parameter densimeter |
-
2015
- 2015-07-16 CN CN201520519341.XU patent/CN204924369U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576973A (en) * | 2016-02-24 | 2016-05-11 | 台州谊聚机电有限公司 | Switching power supply circuit of water pump system |
| CN105587491A (en) * | 2016-02-24 | 2016-05-18 | 台州谊聚机电有限公司 | Photovoltaic water pump system |
| CN112798466A (en) * | 2021-02-02 | 2021-05-14 | 上海朝辉压力仪器有限公司 | Multi-parameter densimeter |
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| GR01 | Patent grant |