CN206399498U - Light emitting diode fluid level indicator - Google Patents
Light emitting diode fluid level indicator Download PDFInfo
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- CN206399498U CN206399498U CN201621359176.7U CN201621359176U CN206399498U CN 206399498 U CN206399498 U CN 206399498U CN 201621359176 U CN201621359176 U CN 201621359176U CN 206399498 U CN206399498 U CN 206399498U
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Abstract
The utility model light emitting diode fluid level indicator, it is made up of housing (1), circuit board (2), Measure Board (3), control circuit, windowpane (4) is provided with the front end face of housing (1), in the vertical slotted eye (31) opened up on the leading section insertion Measure Board (3) for the red and green luminous diode (21) being vertically arranged on circuit board (2), control circuit is made up of MCU acquisition process circuit, 74HC595 modules, red and green luminous LED lighting control circuit.Its is easy to use, and display is clear, is easy to observation, is adapted to read at a distance and night reads, it is possible to installed and used at the scene away from container.
Description
Technical field
What the utility model was related to is fluid level indicator.
Background technology
For the liquid level in measurement and control container, fluid level indicator or fluid level transmitter are installed on container, in container
Upper display liquid level directly perceived or teletransmission control.
Liquid level display on container, because container is often in a high position, or container is away from escape way, scene
Patrolman is inconvenient to check, is not easy to see clearly.
Utility model content
The purpose of this utility model be to provide it is a kind of it is easy to use, can be installed and used away from container, display is clear, is easy to see
The fluid level indicator of the diode displaying of survey.
The utility model light emitting diode fluid level indicator is made up of housing 1, circuit board 2, Measure Board 3, control circuit,
Windowpane 4 is provided with the front end face of housing 1；Circuit board 2 and Measure Board 3 pass through bottom of chamber in support column 20,30 and housing 1 respectively
Portion is fixedly connected；A row has been vertically arranged on circuit board 2（Common-anode）Red and green luminous diode 21, is offered on Measure Board 3
What is opened up on the leading section insertion Measure Board 3 for the red and green luminous diode 21 being vertically arranged on one vertical slotted eye 31, circuit board 2 is perpendicular
In straight trough hole 31.
Control circuit is made up of MCU acquisition process circuit, 74HC595 modules, red and green luminous LED lighting control circuit.
Red and green luminous LED lighting control circuit is followed by current limliting electricity by the base stage short circuit of NPN triode and PNP triode
R1 is hindered, the current-limiting resistance R1 other end connects with 74HC595 control output end, the emitter stage and PNP triode of NPN triode
Colelctor electrode short circuit after be grounded, the collector series connection current-limiting resistance R2 of NPN triodes, the current-limiting resistance R2 other end with it is red green
The negative electrode short circuit of the green LED of light emitting diode, the emitter stage concatenation current-limiting resistance R3 of PNP triode, current-limiting resistance
The negative electrode short circuit of the R3 other end and the red light emitting diodes of red and green luminous diode, red and green luminous diode common-anode termination
Power supply.
When controlling 74HC595 modules output pin output low level, PNP triode conducting, NPN triode cut-off, this
When red light emitting diodes it is bright, when control 74HC595 modules output pin output high level when, PNP triode cut-off, NPN tri-
Pole pipe is turned on, and now green LED is bright, and then is realized by controlling 74HC595 pins low and high level to control light-emitting diodes
Manage red green display.
Each 74HC595 modules connect 8 red and green luminous LED lighting control circuits, according to measurement needs, Ke Yiyou
Several 74HC595 module-cascades, the more red and green luminous LED lighting control circuits of control driving.
Utility model works process：
1st, when container measures the liquid level in container provided with fluid level transmitter, the 4-20mA electricity exported according to fluid level transmitter
Signal is flowed, by a sample resistance being connected in 4-20mA current signal loops, current signal is converted into voltage signal,
MCU acquisition process circuits gather voltage on the sample resistance, determine that current level value accounts for the percentage of whole measurement range, MCU
Acquisition process circuit accounts for the hundred of whole measurement range according to the quantity of default current LED, and the level value currently measured
Divide ratio, determine the LED display green of the following quantity of percentage, the LED display red of percentage above quantity.MCU is gathered
The corresponding low and high level of 74HC595 cascade circuits control output of processing circuit controls connection, and then control red and green luminous two pole
Pipe emission control circuit realizes that red and green color liquid level is shown.
2nd, when container measures the liquid level in container using magnetic float liquidlevel meter, tongue tube that magnetic float liquidlevel meter is provided with and
The liquid level sensor of resistance composition, according to liquid level in diverse location, the control tongue tube adhesive of magnetic float or disconnection, output is different
Resistance value, MCU acquisition process circuit and gathers liquid level sensor output voltage by giving liquid level sensor to provide constant current-supplying
Value, it is determined that current liquid level sensor output resistance, according to the all-in resistance resistance of known liquid level sensor and current measurement
Resistance value, determine that current level value accounts for the percentage of whole measurement range, MCU acquisition process circuit is according to default current
The quantity of LED, and the level value currently measured account for the percentage of whole measurement range, determine the LED of the following quantity of percentage
Lamp display green, the LED display of percentage above quantity is red.The 74HC595 cascades of MCU acquisition process circuit control connection
The corresponding low and high level of circuit control output, and then control red and green luminous LED lighting control circuit realiration red and green color liquid level
Display.
3rd, when container uses the liquid level in the fluid level transmitter with RS485 communication interfaces, measurement current container, MCU
There is acquisition process circuit RS485 communication interfaces to be communicated with fluid level transmitter, and then read the liquid of current level transmitter measurement
Place value and level value account for the percentage of whole measurement range, and MCU acquisition process circuit is according to the number of default current LED
Amount, and the liquid level percent value currently measured, determine the LED display green of the following quantity of percentage, percentage above quantity
LED display it is red.The corresponding height electricity of 74HC595 cascade circuits control output of MCU acquisition process circuit control connection
It is flat, and then control red and green luminous LED lighting control circuit realiration red and green color liquid level to show.
The utility model light emitting diode fluid level indicator, easy to use, display is clear, is easy to observation, is adapted to remote
Read and night reads, it is possible to installed and used at the scene away from container, facilitate liquid level to read, liquid is green, gas is red to show container
Interior liquid level, facilitates site operation personnel to read.
Brief description of the drawings
Fig. 1 is the utility model example structure schematic diagram.
Fig. 2 is Fig. 1 A-A sectional views.
Fig. 3 is control circuit principle structure figure of the present utility model.
Fig. 4 is the red and green luminous LED lighting control circuit principle structure figure of the utility model.
Embodiment
The utility model light emitting diode fluid level indicator is made up of housing 1, circuit board 2, Measure Board 3, control circuit,
Windowpane 4 is provided with the front end face of housing 1；Circuit board 2 and Measure Board 3 pass through bottom of chamber in support column 20,30 and housing 1 respectively
Portion is fixedly connected；The red and green luminous diode 21 of row's common-anode has been vertically arranged on circuit board 2, one is offered on Measure Board 3
What is opened up on the leading section insertion Measure Board 3 for the red and green luminous diode 21 being vertically arranged on vertical slotted eye 31, circuit board 2 is vertical
In slotted eye 31.
As shown in accompanying drawing 3, control circuit is by MCU acquisition process circuit, 74HC595 modules, red and green luminous LED lighting
Control circuit composition.
As shown in Figure 4, red and green luminous LED lighting control circuit is short by the base stage of NPN triode and PNP triode
Connect and be followed by current-limiting resistance R1, the current-limiting resistance R1 other end connects with 74HC595 control output end, the transmitting of NPN triode
It is grounded after the colelctor electrode short circuit of pole and PNP triode, the collector series connection current-limiting resistance R2 of NPN triodes, current-limiting resistance R2's
The negative electrode short circuit of the other end and the green LED of red and green luminous diode, the emitter stage concatenation current limliting electricity of PNP triode
Hinder R3, the negative electrode short circuit of the current-limiting resistance R3 other end and the red light emitting diodes of red and green luminous diode, red and green luminous two
Pole pipe common-anode termination power.
When controlling 74HC595 modules output pin output low level, PNP triode conducting, NPN triode cut-off, this
When red light emitting diodes it is bright, when control 74HC595 modules output pin output high level when, PNP triode cut-off, NPN tri-
Pole pipe is turned on, and now green LED is bright, and then is realized by controlling 74HC595 pins low and high level to control light-emitting diodes
Manage red green display.
Each 74HC595 modules connect 8 red and green luminous LED lighting control circuits, according to measurement needs, Ke Yiyou
Several 74HC595 module-cascades, the more red and green luminous LED lighting control circuits of control driving.
Claims (1)
1. light emitting diode fluid level indicator, it is characterized in that：By housing (1), circuit board (2), Measure Board (3), control circuit structure
Into being provided with windowpane (4) on the front end face of housing (1)；Circuit board (2) and Measure Board (3) respectively by support column (20,
30) it is fixedly connected with housing (1) intracavity bottom；The red and green luminous diode of a row (21) is vertically arranged on circuit board (2), in mark
The leading section for the red and green luminous diode (21) being vertically arranged on a vertical slotted eye (31), circuit board (2) is offered on chi plate (3)
In the vertical slotted eye (31) opened up on insertion Measure Board (3)；
Control circuit is made up of MCU acquisition process circuit, 74HC595 modules, red and green luminous LED lighting control circuit：
Red and green luminous LED lighting control circuit is followed by current-limiting resistance by the base stage short circuit of NPN triode and PNP triode
(R1), the other end of current-limiting resistance (R1) connects with 74HC595 control output end, emitter stage and the poles of PNP tri- of NPN triode
It is grounded after the colelctor electrode short circuit of pipe, the collector series connection current-limiting resistance (R2) of NPN triodes, the other end of current-limiting resistance (R2)
With the negative electrode short circuit of the green LED of red and green luminous diode, the emitter stage of PNP triode concatenates current-limiting resistance (R3),
The negative electrode short circuit of the other end of current-limiting resistance (R3) and the red light emitting diodes of red and green luminous diode, red and green luminous diode
Common-anode termination power；
When controlling 74HC595 modules output pin output low level, PNP triode conducting, NPN triode cut-off is now red
Color light emitting diode is bright, when controlling 74HC595 modules output pin output high level, PNP triode cut-off, NPN triode
Conducting, now green LED is bright, and then realizes by controlling 74HC595 pins low and high level to control light emitting diode red
Green display；
Each 74HC595 modules connect 8 red and green luminous LED lighting control circuits, according to measurement needs, by several
74HC595 module-cascades, the more red and green luminous LED lighting control circuits of control driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359176.7U CN206399498U (en) | 2016-12-12 | 2016-12-12 | Light emitting diode fluid level indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359176.7U CN206399498U (en) | 2016-12-12 | 2016-12-12 | Light emitting diode fluid level indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206399498U true CN206399498U (en) | 2017-08-11 |
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ID=59508687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621359176.7U Active CN206399498U (en) | 2016-12-12 | 2016-12-12 | Light emitting diode fluid level indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206399498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225475A (en) * | 2017-12-26 | 2018-06-29 | 贵州航天凯山石油仪器有限公司 | A kind of optocoupler and its assemble method of most simple encapsulation |
-
2016
- 2016-12-12 CN CN201621359176.7U patent/CN206399498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225475A (en) * | 2017-12-26 | 2018-06-29 | 贵州航天凯山石油仪器有限公司 | A kind of optocoupler and its assemble method of most simple encapsulation |
| CN108225475B (en) * | 2017-12-26 | 2020-02-14 | 贵州航天凯山石油仪器有限公司 | Simplest packaged optical coupler and assembling method thereof |
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