CN206709930U - The double float level meters of intelligence - Google Patents
The double float level meters of intelligence Download PDFInfo
- Publication number
- CN206709930U CN206709930U CN201720237130.6U CN201720237130U CN206709930U CN 206709930 U CN206709930 U CN 206709930U CN 201720237130 U CN201720237130 U CN 201720237130U CN 206709930 U CN206709930 U CN 206709930U
- Authority
- CN
- China
- Prior art keywords
- resistance
- liquid level
- control module
- acquisition control
- guide rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
The utility model discloses a kind of double float level meters of intelligence, this liquid level gauge includes acquisition control module, terminal box, hollow guide rod, the first magnetic float, the second magnetic float and resistance liquid level bar, hollow guide rod is located at terminal box bottom surface by flange, acquisition control module is in terminal box, first magnetic float and the second magnetic float are inserted in hollow guide rod and lifted in the hollow guide rod of promotion lower edge of two liquid-level interfaces respectively, and resistance liquid level bar is in hollow guide rod and signal output part connects the signal input part of acquisition control module.This liquid level gauge can continuously measure the level value of two boundary liquid levels simultaneously, improve and measure accurate and scope, reduce equipment cost, and conveniently integrated with control system.
Description
Technical field
It the utility model is related to a kind of double float level meters of intelligence.
Background technology
For liquid level gauge, current continuity floating ball lever meter is all single-floating ball, although liquid-level switch has more ball floats,
But the scope of activities of each ball float is limited, can only play the function of monitoring alarm, it is impossible to show the change of liquid level in real time
Change.When processing needs the demand of two liquid levels of monitoring simultaneously, the device that generally use is integrated with two liquid level gauges is next real
The measurement of existing double liquid level, so improve the cost of level gauging.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of double float level meters of intelligence, and this liquid level gauge can be simultaneously
The level value of continuous two boundary liquid levels of measurement, improves and measures accurate and scope, reduce equipment cost, and be with control conveniently
System integrates.
In order to solve the above technical problems, the double float level meters of the utility model intelligence include acquisition control module, terminal box,
Hollow guide rod, the first magnetic float, the second magnetic float and resistance liquid level bar, the hollow guide rod are connect by flange located at described
Line box bottom surface, the acquisition control module is in the terminal box, the first magnetic float and the second magnetic float difference
It is inserted in the hollow guide rod and is located at institute in the hollow guide rod lifting of promotion lower edge of two liquid-level interfaces, the resistance liquid level bar
State in hollow guide rod and signal output part connects the signal input part of the acquisition control module.
Further, the acquisition control module includes power output end, the first signal acquisition terminal and secondary signal collection terminal,
The resistance liquid level bar includes some resistance and some magnetic switch, and some resistance equidistantly concatenate successively and head and the tail both ends
The power output end and secondary signal collection terminal of the acquisition control module, one end point of some magnetic switch are connected respectively
Concatenation point, the other end for not connecting some resistance connect the first signal acquisition terminal of the acquisition control module.
Further, the resistance liquid level bar is a plurality of and head and the tail connect successively, the series resistor of adjacent resistor liquid level bar
Between connect altimetric compensation resistance, the head and the tail both ends of whole series resistances connect the power supply output of the acquisition control module respectively
End and secondary signal collection terminal.
Further, this liquid level gauge also includes current-limiting resistance and divider resistance, and the current-limiting resistance is serially connected with the collection control
Between the power output end of molding block and the head end of whole series resistances, described divider resistance one end connects the acquisition control mould
The secondary signal collection terminal of block, other end ground connection.
Further, the acquisition control module is connected by RS485 communication buses with host computer.
Further, some resistance of the resistance liquid level bar, altimetric compensation resistance, current-limiting resistance and shunt resistance are accurate
Resistance.
Because the double float level meters of the utility model intelligence employ above-mentioned technical proposal, i.e. this liquid level gauge includes collection control
Molding block, terminal box, hollow guide rod, the first magnetic float, the second magnetic float and resistance liquid level bar, hollow guide rod pass through flange
Located at terminal box bottom surface, acquisition control module is in terminal box, during the first magnetic float and the second magnetic float are inserted in respectively
Empty guide rod and in the promotion lower edge hollow guide rod lifting of two liquid-level interfaces, resistance liquid level bar is in hollow guide rod and believes
The signal input part of number output end connection acquisition control module.This liquid level gauge can continuously measure the liquid level of two boundary liquid levels simultaneously
Value, improve and measure accurate and scope, reduce equipment cost, and it is conveniently integrated with control system.
Brief description of the drawings
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the double float level meter structural representations of the utility model intelligence；
Fig. 2 is resistance liquid level bar circuit diagram in this liquid level gauge；
Fig. 3 is a plurality of resistance liquid level bar sequential circuit schematic diagram in this liquid level gauge.
Embodiment
Embodiment as shown in figure 1, the double float level meters of the utility model intelligence include acquisition control module 1, terminal box 2,
Hollow guide rod 3, the first magnetic float 4, the second magnetic float 5 and resistance liquid level bar 6, the hollow guide rod 3 are set by flange 21
In the bottom surface of terminal box 2, the acquisition control module 1 is in the terminal box 2, first magnetic float 4 and second
Magnetic float 5 is inserted in the hollow guide rod 3 and lifted in the hollow guide rod 3 of promotion lower edge of two liquid-level interfaces respectively, described
Resistance liquid level bar 6 is in the hollow guide rod 3 and signal output part connects the signal input of the acquisition control module 1
End.
As shown in Figure 2, it is preferred that the acquisition control module 1 includes power output end 11, the and of the first signal acquisition terminal 12
Secondary signal collection terminal 13, the resistance liquid level bar 6 include some resistance 61 and some magnetic switch 62, some resistance 61
Equidistantly concatenation and head and the tail both ends connect power output end 11 and the secondary signal collection of the acquisition control module 1 respectively successively
End 13, one end of some magnetic switch 62 connect the concatenation point of some resistance 61, adopted described in other end connection respectively
Collect the first signal acquisition terminal 12 of control module 1.Acquisition control module in this liquid level gauge can use chip model for
ADuCM361 precision analog microcontroller, it is integrated with high performance multi-channel sigma-delta type analog-to-digital converter, the first signal acquisition
End and two input channels that secondary signal collection terminal is ADuCM361 chips；Some resistance of resistance liquid level bar and some magnetic
Switch forms the sensor of level gauging, and is encapsulated using dry-reed.
As shown in Figure 3, it is preferred that the resistance liquid level bar 6 is a plurality of and head and the tail connect successively, adjacent resistor liquid level bar
Series resistor between connect altimetric compensation resistance 63, the head and the tail both ends of whole series resistances connect the acquisition control mould respectively
The power output end 11 and secondary signal collection terminal 13 of block 1.In the application scenario of some high levels measurement, wall scroll resistance liquid level bar
Can not meet the needs of measuring stroke, therefore a plurality of resistance liquid level bar concatenation can be used to improve measurement stroke, in actual applications,
Because adjacent resistor liquid level bar has certain spacing when mounted, and the measurement of liquid level is related to the spacing of series resistor, because
This altimetric compensation resistance of being connected between the series resistor of adjacent resistor liquid level bar, to improve the measurement accuracy of liquid level.
Preferably, this liquid level gauge also includes current-limiting resistance R1 and divider resistance R2, the current-limiting resistance R1 are serially connected with described
Between the power output end 11 of acquisition control module 1 and the head end of whole series resistances, described divider resistance R2 one end connects institute
State secondary signal collection terminal 13, the other end ground connection of acquisition control module 1.
As shown in Figure 1, it is preferred that the acquisition control module 1 is connected by RS485 communication buses with host computer 7, and is propped up
Modbus agreements are held, host computer 7 can distinguish different liquid level gauges according to tributary address, can be hung on RS485 communication buses
The double float level meters of multiple intelligence are connect, realize the monitoring of liquid level；Acquisition control module can pass through multiple repairing weld, averaging simultaneously
Mode further improve liquid level measurement precision.
Preferably, some resistance 61 of the resistance liquid level bar 6, altimetric compensation resistance 63, current-limiting resistance R1 and shunting electricity
It is precision resistance to hinder R2.The item indexs such as resistance error, temperature coefficient, distributed capacitance parameter and the distributed inductance parameter of precision resistance
Conventional, electric-resistance is superior to, so as to ensure that the measurement accuracy of this liquid level gauge.
The first magnetic float and the second magnetic float in this liquid level gauge have different density, when measuring liquid level, the
One magnetic float and the second magnetic float fluctuate, in guide rod in the presence of different liquids buoyancy along guide rod 5
Resistance liquid level bar resistance in the presence of magnetic float changes, and specially magnetic switch is under the magnetic fields of magnetic float
Opening and closing, so as to cause the number of series resistance to change, show as the signal acquisition terminal of acquisition control module first and
The voltage change of secondary signal collection terminal.Pass through the voltage of sample first signals collection terminal and secondary signal collection terminal in real time
Value, it is possible to the changing value of resistance in resistance liquid level bar is extrapolated, so that it is determined that the height of two liquid levels.
Specific derivation process is as follows：
As shown in Figure 1, it is assumed that height of the interface 8 of first medium liquid-to-air apart from the bottom of guide rod 3 is H2, first
Height of the interface 9 of media fluid and second medium liquid apart from the bottom of guide rod 3 is H1, and resistance liquid level bar is in first medium liquid
The resistance sum of the interface more than 8 of body and air is RL2, and resistance liquid level bar is in first medium liquid and second medium liquid
Resistance sum of the interface of body below 9 is RL1, and the voltage of power output end 11 of acquisition control module 1 is VCC, collection
The voltage of first signal acquisition terminal 12 of control module 1 is V1, and the voltage of the secondary signal collection terminal 13 of acquisition control module 1 is
V2, the resistance of divider resistance is RS2, and the resistance of current-limiting resistance is RS1；
Assuming that the electric current for flowing through some series resistances of resistance liquid level bar is I, the average resistance of some series resistances is Rave,
The average distance of magnetic switch is GAP, and the total resistance value of resistance liquid level bar is Rmax, range LENGTH, then,
（1）
（2）
（3）
（4）
（5）
Assuming that the sampled value that V1 corresponds to acquisition control module is AD1, the sampled value that V2 corresponds to acquisition control module is AD2,
Sampled value can be expressed as with the relation of voltage：
（6）
By formula（6）And formula（1）Substitution formula（2）, can obtain
（7）
By formula（6）, formula（7）And formula（1）Substitution formula（4）, can obtain
（8）
According to（X is magnetic switch number, i.e., accurate electricity
Hinder number）, substitute into formula（3）And formula（5）, can obtain
（9）
（10）
According to formula（9）And formula（10）, this liquid level gauge is exactly to be moved by two magnetic floats along the position of guide rod, detection electricity
The change of resistance value measures the liquid level of two media in road, and this liquid level gauge masked the resistance of some series resistors in itself and become
Change and error, according to probability theory, resistance number is more, and the Standard resistance range of resistance is closer to normal distribution, using average resistance
It is more accurate to participate in the result that computing obtains.Therefore, the average distance GAP of magnetic switch is smaller, magnetic in unit length
Property switch number it is more, i.e. series resistance is more, and the precision of measurement result is higher.And in resistance liquid level bar resistance total resistance
Value Rmax can be obtained in the setting stage by actual measurement, be analyzed as follows：
According to circuit theory diagrams, in the case of an only magnetic switch closure, (RL1+RL2) is equal to Rmax, real
It is in the application of border, two magnetic floats with annular magnet are closely adjacent, because the size of magnetic float is fixed, then by annular
The magnetic fields of magnet and the number of magnetic switch that closes is changeless, therefore (RL1+RL2) adds two magnetic
The resistance of float position is equal to Rmax, as (RL1+RL2)>>During single resistance, measurement error is almost nil.
Because the quantity of resistance liquid level bar can configure, therefore the range of this liquid level gauge can independently be set according to demand
Put.In the stage of setting, the setting of the parameter such as range and liquid level gauge tributary address is completed, acquisition control module is calculated by computing
The all-in resistance resistance of resistance liquid level bar, by all-in resistance resistance, range and tributary address are saved in built-in memory, Yi Houshang
When electric, these parameters can be directly read from built-in memory.
This liquid level gauge can simultaneously continuously measure the level value of two liquid medium interfaces, and accuracy is surveyed up to 1%
Amount range can configure according to demand, and from 0.2m to 20m, while measurement range is bigger, and with orthofunction is reviewed one's lessons by oneself, intellectuality is joined
Number configuration, it is convenient integrated with tank level control system, reduce equipment cost.
Claims (6)
- A kind of 1. double float level meters of intelligence, it is characterised in that：This liquid level gauge includes acquisition control module, terminal box, hollow led Bar, the first magnetic float, the second magnetic float and resistance liquid level bar, the hollow guide rod are located at the terminal box bottom by flange Face, for the acquisition control module in the terminal box, first magnetic float and the second magnetic float are inserted in institute respectively State hollow guide rod and lifted in the hollow guide rod of promotion lower edge of two liquid-level interfaces, the resistance liquid level bar is located at described hollow In guide rod and signal output part connects the signal input part of the acquisition control module.
- 2. the double float level meters of intelligence according to claim 1, it is characterised in that：The acquisition control module includes power supply Output end, the first signal acquisition terminal and secondary signal collection terminal, the resistance liquid level bar includes some resistance and some magnetic are opened Close, some resistance successively equidistantly concatenation and head and the tail both ends connect respectively the acquisition control module power output end and Secondary signal collection terminal, one end of some magnetic switch connect the concatenation point of some resistance, other end connection respectively First signal acquisition terminal of the acquisition control module.
- 3. the double float level meters of intelligence according to claim 1 or 2, it is characterised in that：The resistance liquid level bar is a plurality of And head and the tail connect successively, altimetric compensation resistance of being connected between the series resistor of adjacent resistor liquid level bar, whole series resistances Head and the tail both ends connect the power output end and secondary signal collection terminal of the acquisition control module respectively.
- 4. the double float level meters of intelligence according to claim 3, it is characterised in that：This liquid level gauge also include current-limiting resistance and Divider resistance, the current-limiting resistance be serially connected with the power output end of the acquisition control module and whole series resistances head end it Between, described divider resistance one end connects the secondary signal collection terminal of the acquisition control module, other end ground connection.
- 5. the double float level meters of intelligence according to claim 4, it is characterised in that：The acquisition control module passes through RS485 communication buses are connected with host computer.
- 6. the double float level meters of intelligence according to claim 4, it is characterised in that：Some electricity of the resistance liquid level bar Resistance, altimetric compensation resistance, current-limiting resistance and shunt resistance are precision resistances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720237130.6U CN206709930U (en) | 2017-03-13 | 2017-03-13 | The double float level meters of intelligence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720237130.6U CN206709930U (en) | 2017-03-13 | 2017-03-13 | The double float level meters of intelligence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206709930U true CN206709930U (en) | 2017-12-05 |
Family
ID=60469786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720237130.6U Active CN206709930U (en) | 2017-03-13 | 2017-03-13 | The double float level meters of intelligence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206709930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572021A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | The double float level meters of intelligence |
-
2017
- 2017-03-13 CN CN201720237130.6U patent/CN206709930U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572021A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | The double float level meters of intelligence |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201364194Y (en) | Liquid flow test device | |
| CN101738947B (en) | High-speed high-precision process parameter online calibration tester | |
| CN206411185U (en) | A kind of automatic switching range high-current detector | |
| CN102980630B (en) | A kind of intelligent digital capacitive liquid level sensor | |
| CN102901537A (en) | Method and device for measuring flow of gate | |
| CN200979430Y (en) | A flow measurement device for two-phase and three-media of gas-water-oil | |
| CN206709930U (en) | The double float level meters of intelligence | |
| CN108572021A (en) | The double float level meters of intelligence | |
| CN201438127U (en) | Precise liquid level sensor | |
| CN100427893C (en) | Flux measuring method based on negative resistance property and resistance flowmeter | |
| CN110146143A (en) | A kind of oil-level measurement system based on Hall effect | |
| CN101813793B (en) | Digital control type pluviometer | |
| CN108072426A (en) | During induction pieces failure, separating liquid high measurement method and its floating-ball fluid level transmitter layer by layer | |
| CN108431553A (en) | The cone shaped area flow meter of range measurement in the way of magnetostriction | |
| CN103529191B (en) | Novel oil product analysis device | |
| CN208984687U (en) | Electric energy metering device and electric energy meter | |
| CN103852114A (en) | Flowmeter capable of being calibrated on line | |
| CN202748104U (en) | High-precision linear fuel sensor | |
| CN106768207A (en) | A kind of weighing system for water flow device | |
| CN208795326U (en) | A kind of general floating ball resistance type liquidometer | |
| CN208672717U (en) | A kind of detection device of electronic component | |
| CN208383172U (en) | A kind of tank capacity detection device | |
| CN202994244U (en) | Intelligent digital capacitance liquid level sensor | |
| CN212402202U (en) | Liquid storage pot profit volume measuring device and liquid storage pot | |
| CN207036946U (en) | A kind of current measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |