CN206114048U - Little consumption morning and evening tides liquid level changer - Google Patents
Little consumption morning and evening tides liquid level changer Download PDFInfo
- Publication number
- CN206114048U CN206114048U CN201621084980.9U CN201621084980U CN206114048U CN 206114048 U CN206114048 U CN 206114048U CN 201621084980 U CN201621084980 U CN 201621084980U CN 206114048 U CN206114048 U CN 206114048U
- Authority
- CN
- China
- Prior art keywords
- converter
- chip microcomputer
- pressure sensor
- transmission port
- signal transmission
- 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
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model belongs to a liquid level changer field, the morning and evening tides liquid level measurement method that especially relates to a little consumption morning and evening tides liquid level changer and adopt, including pressure sensor, AD converter, singlechip, RS485 interface and power steady voltage part, the RS485 interface meets the signal transmission port of singlechip, the signal transmission port of singlechip meets AD converter and pressure sensor respectively, pressure sensor's signal transmission port meets the signal transmission port of AD converter. The changer is in little consumption standby state at ordinary times, and the instruction of sending through the RS485 interface will be in the singlechip activation of electric state, and the single chip microcomputer control peripheral circuit is carried out to measure and is in consumption standby state a little again with communication operation back changer. The utility model discloses save the electric energy, the network deployment is convenient, is fit for the long -term occasion of power supply in succession of dry battery, can show the life who prolongs the battery, reduces later stage use cost.
Description
Technical field
The utility model belongs to fluid level transmitter field, more particularly to a kind of for measuring the special with Micro Energy Lose of tide liquid level
The fluid level transmitter of point and RS485 communication functions.
Background technology
Fluid level transmitter is extension and development to pressure transmitter technology, according to the liquid of different specific weight in differing heights
The linear principle of produced pressure, realizes to water, the volume of oil and pastel, high liquid, the accurate measurement of weight and biography
Send.
At present, known fluid level transmitter has following a few classes.
The first kind：Powered using dc source, there is provided 4～20mA of two-wire system electric currents are exported.The output letter of this transmitter
Number need separate cabling, it is impossible to interconnect.The characteristics of current signal, prevents wiring distance from long, is otherwise easily interfered.
Such transmitter will carry out Current Voltage conversion in receiving terminal, can bring additive error, therefore its certainty of measurement is restricted, generally
0.5% or so.In addition, operating current is at least 4mA, it is impossible to meet the requirement of low-power consumption, be not suitable for being powered using battery.
Equations of The Second Kind：Powered using dc source, there is provided RS485 communication signals are exported.This transmitter wiring is more convenient,
Multiple transmitters can be connected in a network by universal serial bus, while antijamming capability is stronger, but such transmitter
In instantaneous operating conditions, the operating current of transmitter is larger, generally reaches mA magnitudes, therefore is not suitable for being powered using battery.
Utility model content
The utility model is intended to overcome the deficiencies in the prior art part and provide a kind of saving electric energy, and networking is convenient, is adapted to
The occasion that dry cell is continuously powered for a long time, can significantly extend the service life of battery, reduce the Micro Energy Lose of later stage use cost
Tide fluid level transmitter.
To solve above-mentioned technical problem, what the utility model was realized in.
Micro Energy Lose tide fluid level transmitter, including pressure sensor, a/d converter, single-chip microcomputer, RS485 interfaces and power supply be steady
Laminate section；The RS485 interfaces connect the signal transmission port of single-chip microcomputer；The signal transmission port of the single-chip microcomputer meets respectively AD and turns
Parallel operation and pressure sensor；The signal transmission port of the pressure sensor connects the signal transmission port of a/d converter；The electricity
Source voltage stabilization part is single-chip microcomputer, a/d converter and RS485 interfaces provide power supply.
Used as a kind of preferred version, pressure sensor described in the utility model adopts pressure resistance type gauge pressure transducer chip
TS86。
Further, a/d converter described in the utility model adopts ADS1247 chips.
Further, RS485 interfaces described in the utility model adopt MAX3471 chips.
Further, single-chip microcomputer described in the utility model adopts STM8L051 chips.
Further, power supply voltage stabilization part described in the utility model adopts LDO voltage stabilizing chips.
The utility model saves electric energy, and networking is convenient, and the occasion that suitable dry cell is continuously powered for a long time can significantly extend
The service life of battery, reduces later stage use cost.In actual applications, the utility model Micro Energy Lose tide fluid level transmitter work
Make in field, powered using disposable battery, using interval measure by the way of, transmitter it is low in energy consumption, battery can be met long-term
The requirement for using.Meanwhile, the utility model can adopt RS485 mode output datas, and networking is convenient.
Description of the drawings
With reference to the accompanying drawings and detailed description the utility model is described in further detail.Protection model of the present utility model
Enclose the statement for being not only limited to following content.
Fig. 1 is the theory diagram of the utility model Micro Energy Lose tide fluid level transmitter.
Fig. 2 is the circuit theory diagrams of the utility model Micro Energy Lose tide fluid level transmitter.
Fig. 3 is the utility model tide level measuring method FB(flow block).
Specific embodiment
As shown in figure 1, Micro Energy Lose tide fluid level transmitter, including pressure sensor, a/d converter, single-chip microcomputer, RS485 connect
Mouth and power supply voltage stabilization part；The RS485 interfaces connect the signal transmission port of single-chip microcomputer；The signal transmission port of the single-chip microcomputer
A/d converter and pressure sensor are connect respectively；The signal transmission port of the pressure sensor connects the signal transmission end of a/d converter
Mouthful；The power supply voltage stabilization part is single-chip microcomputer, a/d converter and RS485 interfaces provide power supply.
Shown in Figure 2, pressure sensor described in the utility model adopts pressure resistance type gauge pressure transducer chip TS86.This reality
ADS1247 chips are adopted with the new a/d converter.RS485 interfaces described in the utility model adopt MAX3471 chips.This reality
STM8L051 chips are adopted with the new single-chip microcomputer.Power supply voltage stabilization part described in the utility model adopts LDO voltage stabilizing chips.
It is shown in Figure 3, the tide level measuring method that above-mentioned Micro Energy Lose tide fluid level transmitter is adopted, by following step
Suddenly carry out.
（1）In the standby state, single-chip microcomputer and a/d converter are in Micro Energy Lose power down operations pattern, and internal clocking stops,
Retain internal RAM data, pressure sensor power-off, RS485 interfaces receive wait state in low-power consumption.
（2）Host computer sends instruction, RS485 interface outputting data signals；Monolithic machine testing corresponding signal, in triggering outside
Break to wake up single-chip microcomputer.
（3）Single-chip microcomputer receives serial data, after obtaining effective instruction, starts pressure sensor power supply, wakes up a/d converter,
Complete a perfect measurement process.
（4）After measurement terminates, a/d converter is reset to power-down state by closing presure probe power, then carries out data
Calculate, and measurement result is sent to host computer by RS485 interfaces；
（5）After communication terminates, single-chip microcomputer reenters power-down state.
Step described in the utility model（1）Operating current be less than or equal to 10uA；The step（3）Operating current be
1mA；The step（4）Operating current be 20mA.
The utility model transmitter is at ordinary times low power consumption standby state, and the instruction sent by RS485 interfaces will be in
The single-chip microcomputer activation of power-down state, Single-chip Controlling peripheral circuit is performed and be in again after measurement and communication operation low power consumption standby
State.
The utility model power supply Jing Micro Energy Lose LDO voltage stabilizing chips are powered to circuit, and the output voltage of the chip is
3.3V；Single-chip microcomputer is using the chip for possessing internal RC oscillators；A/d converter is using the chip with power down operations pattern；
RS485 interfaces adopt the chip of Micro Energy Lose.The power supply of pressure sensor chip is by Single-chip Controlling.
The utility model single-chip microcomputer adopts STM8L051 chips；A/d converter adopts ADS1247 chips；RS485 interfaces are adopted
Use MAX3471；Strain gauge is TS86；Power supply voltage stabilizing chip is HT7533.
Circuit side connector face, external power is input into VPP through protection circuit and filter circuit to be followed by the defeated of LDO voltage stabilizing chips
Enter end, LDO voltage stabilizing chips are output as main power source, there is provided use to single-chip microcomputer, a/d converter and RS485 interfaces.Pressure sensing
The positive supply of device is connect on certain I/O port of single-chip microcomputer, therefore, it is possible to conveniently realize on/off control.
In the standby state, single-chip microcomputer and a/d converter are in Micro Energy Lose power down operations pattern.Single-chip microcomputer internal clocking stops
Only, but the RAM data of inside still retains, external interrupt wakeup can be passed through.Pressure sensor power supply is turned off to save
Electric energy.RS485 interfaces receive wait state in low-power consumption.Now transmitter consumption electric current is extremely low, close to zero-power.
After host computer sends instruction, RS485 interface outputting data signals.The data of serial communication are arrived with high level
Low level transition edges starting, single-chip microcomputer detects the level skip signal, triggers external interrupt so as to wake up single-chip microcomputer.It is single
Piece machine receives serial data, after obtaining effective instruction, opens pressure sensor power supply, by wake instruction a/d converter, completes
Once complete measurement process.Closing presure probe power after terminating is measured, is reset a/d converter by instruction
For power-down state, then carry out the calculating of data and measurement result is sent to into host computer by RS485 interfaces.Communication terminate with
Afterwards, single-chip microcomputer reenters power-down state, and at this moment whole transmitter is in low power consumption standby state again.
In workflow more than, transmitter is at ordinary times low power consumption standby state, only when host computer instruction is responded
Complete to measure communication operation.Because liquid level signal change is slow, it is generally spaced several minutes and just measures once for even one hour, so
Most time transmitters are in holding state.Power consumption is close to zero under transmitter holding state（Less than or equal to 10uA）,
Main power consumption process is to measure and communicate.After transmitter wakes up, power consumption 1mA, used time 500mS when performing measurement operation；Communication
When operating current be 20mA, used time 25mS.In the case of pressure change is slow, data can be read with proper extension host computer
Cycle, if reading a liquid level data per 10 minutes, the average current of transmitter is about 11.7uA（If standby power consumption is
10uA）, it is only slightly higher than standby power consumption.Such as using the lithium battery of 2000mAH capacity, then continuously can use 19.5.
Shown in Figure 2, U1 is pressure sensor, and U2 is a/d converter, and U3 is single-chip microcomputer, and U4 is RS485 interface communications
Chip, UP1 is power supply voltage stabilizing chip.
Shown in Figure 1, transmitter is mainly steady by pressure sensor, a/d converter, single-chip microcomputer, RS485 interfaces and power supply
Volt circuit is constituted.Power supply stabilization circuit is output as other circuit parts and powers.
Shown in Figure 2, pressure sensor U1 adopts general pressure resistance type gauge pressure transducer chip TS86, and range can be with root
According to being actually needed selection；U2 is a/d converter, using the ADS1247 of TI companies；U3 is single-chip microcomputer, using ST uterine contractions
STM8L051F3；U4 is RS485 interface transceiver chips, using MAX3471；Power supply voltage stabilizing chip UP1 adopts HT7533.
Specific circuit connecting mode.
Input power VPP connects the positive pole of protection diode D1, and the negative pole of D1 connects 2 pin of UP1.The output end voltage VCC of UP1
It is that U2～U4 powers for 3.3V.The input supply voltage scope that VPP is allowed is 4V～24V.The negative terminal of transmitter power supply is GND.
Pressure sensor has 2 input pins and 2 output pins, and wherein input pin anode YVCC meets the one of single-chip microcomputer
Individual universal I/O port pin（It is PB6 in figure）, powered by Single-chip Controlling.The output positive and negative terminal of pressure sensor is connected to AD conversion
The input end of analog signal of device.The control signal of a/d converter：ADDO, ADDI, ADRST, ADINT, ADCS, ADCLK and monolithic
The universal I/O port pin connection of machine.The digital power pin DVDD and analog power pin AVDD of a/d converter meets power end VCC.
DGND the and AGND pins of a/d converter connect power supply ground（GND）.The START pins of a/d converter meet VCC.
The RXD pins of single-chip microcomputer connect the RXD pins of MAX3471, and TXD pins connect the TXD pins of MAX3471.Monolithic
One universal I/O port pin of machine（It is PB7 in figure）RE the and DE pins of connection MAX3471, for switching mould is sent and received
Formula.
The functional pin of above chip can be according to the wiring need of actual PCB with the annexation of controller general I/O pin
It is adjusted, Fig. 2 is only example.
After upper electricity, single-chip microcomputer carries out necessary initialization operation, and then transmitter enters holding state, waits host computer
Wake instruction.
In the standby state, single-chip microcomputer and a/d converter are in Micro Energy Lose power down operations pattern, and internal clocking stops, but
Internal RAM data still retains, and single-chip microcomputer can pass through external interrupt wakeup；Pressure sensor power-off is saving electricity
Energy；RS485 interface transceivers chip receives wait state in low-power consumption, and now consumption electric current is extremely low, close to zero-power.
After host computer sends instruction, RS485 interface transceiver chip outputting data signals.Because the data of serial communication
All be that, with high level to low level transition edges starting, single-chip microcomputer detects the level skip signal, triggering external interrupt from
And wake up single-chip microcomputer.Next single-chip microcomputer receives serial data, after obtaining effective instruction, opens pressure sensor power supply, passes through
Wake instruction a/d converter, completes a perfect measurement process.Closing presure probe power after terminating is measured, by instruction
A/d converter is re-set as into power-down state, then is carried out the calculating of data and measurement result is passed through into RS485 interface chips
It is sent to host computer.After communication terminates, single-chip microcomputer reenters power-down state, and at this moment whole transmitter is in Micro Energy Lose again
Holding state.
In workflow more than, transmitter is at ordinary times low power consumption standby state, only when host computer instruction is responded
Complete to measure communication operation.Because liquid level signal change is slow, it is generally spaced several minutes and just measures once for even one hour, so
Most time transmitters are in holding state.Power consumption is close to zero under transmitter holding state（Less than or equal to 10uA）,
Main power consumption process is to measure and communicate.After transmitter wakes up, power consumption 1mA, used time 500mS when performing measurement operation；Communication
When operating current be 20mA, used time 25mS.In the case of pressure change is slow, data can be read with proper extension host computer
Cycle, if reading a liquid level data per 10 minutes, the average current of transmitter is 11.7uA（If standby power consumption is
10uA）, it is only slightly higher than standby power consumption.Such as using the lithium battery of 2000mAH capacity, then continuously can use 19.5.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (6)
1. a kind of Micro Energy Lose tide fluid level transmitter, it is characterised in that including pressure sensor, a/d converter, single-chip microcomputer,
RS485 interfaces and power supply voltage stabilization part；The RS485 interfaces connect the signal transmission port of single-chip microcomputer；The signal of the single-chip microcomputer
Transmission port connects respectively a/d converter and pressure sensor；The signal transmission port of the pressure sensor connects the letter of a/d converter
Number transmission port；The power supply voltage stabilization part is single-chip microcomputer, a/d converter and RS485 interfaces provide power supply.
2. Micro Energy Lose tide fluid level transmitter according to claim 1, it is characterised in that：The pressure sensor is using pressure
Resistive gauge pressure transducer chip TS86.
3. Micro Energy Lose tide fluid level transmitter according to claim 2, it is characterised in that：The a/d converter is adopted
ADS1247 chips.
4. Micro Energy Lose tide fluid level transmitter according to claim 3, it is characterised in that：The RS485 interfaces are adopted
MAX3471 chips.
5. Micro Energy Lose tide fluid level transmitter according to claim 4, it is characterised in that：The single-chip microcomputer is adopted
STM8L051 chips.
6. Micro Energy Lose tide fluid level transmitter according to claim 5, it is characterised in that：The power supply voltage stabilization part is adopted
LDO voltage stabilizing chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621084980.9U CN206114048U (en) | 2016-09-28 | 2016-09-28 | Little consumption morning and evening tides liquid level changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621084980.9U CN206114048U (en) | 2016-09-28 | 2016-09-28 | Little consumption morning and evening tides liquid level changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206114048U true CN206114048U (en) | 2017-04-19 |
Family
ID=58520895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621084980.9U Active CN206114048U (en) | 2016-09-28 | 2016-09-28 | Little consumption morning and evening tides liquid level changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206114048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870017A (en) * | 2016-09-28 | 2018-04-03 | 沈阳仪表科学研究院有限公司 | Micro energy lose tide fluid level transmitter and its used tide level measuring method |
-
2016
- 2016-09-28 CN CN201621084980.9U patent/CN206114048U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870017A (en) * | 2016-09-28 | 2018-04-03 | 沈阳仪表科学研究院有限公司 | Micro energy lose tide fluid level transmitter and its used tide level measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206863936U (en) | Wireless meter communication module | |
| CN204422647U (en) | Intelligent remote ammeter | |
| CN103822667A (en) | Temperature-humidity acquisition system based on Bluetooth technology | |
| CN104502649B (en) | Low-power consumption single-phase intelligent power meter | |
| CN206708501U (en) | A kind of valve controling circuit of heating system and the control system using the circuit | |
| CN103106784A (en) | Water conservancy multi-parameter acquiring and transmitting device and method | |
| CN206114048U (en) | Little consumption morning and evening tides liquid level changer | |
| CN107918331B (en) | Low-power-consumption RS485 passive awakening device and method with isolation | |
| CN104199343A (en) | Micro data collection system based on serial storage mode | |
| CN203870786U (en) | Wireless remote meter reading equipment with ultra-low-power wakeup function | |
| CN204330838U (en) | A kind of low-power consumption single-phase intelligent electric energy meter | |
| CN203658872U (en) | Swimming pool temperature and liquid level monitoring and alarm instrument | |
| CN107870017A (en) | Micro energy lose tide fluid level transmitter and its used tide level measuring method | |
| CN202057713U (en) | Online monitoring device for wireless lightning arrester | |
| CN107621297A (en) | A kind of long-range monitoring alarm of reservoir level | |
| CN105425029A (en) | Low-power-consumption single-phase smart electric energy meter | |
| CN204389714U (en) | A kind of weather monitoring instrument realizing Temperature and Humidity based on SHT2X chip | |
| CN212727059U (en) | Photovoltaic energy storage monitoring gateway device based on loRa | |
| CN204741115U (en) | Row is inserted to intelligent modularization based on time control | |
| CN201266121Y (en) | Distributed temperature collection apparatus | |
| CN205121374U (en) | Heat dissipation control system based on singlechip | |
| CN108107781A (en) | A kind of ballast water level monitoring system | |
| CN204129034U (en) | The integrated water quality monitoring sensor of the multi-functional multiparameter of water environment | |
| CN207280549U (en) | A kind of long-range monitoring alarm of reservoir level | |
| CN208300033U (en) | A kind of gauge table collector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |