CN109917721A - Mode of wireless transmission level monitoring device and method - Google Patents
Mode of wireless transmission level monitoring device and method Download PDFInfo
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- CN109917721A CN109917721A CN201910279257.8A CN201910279257A CN109917721A CN 109917721 A CN109917721 A CN 109917721A CN 201910279257 A CN201910279257 A CN 201910279257A CN 109917721 A CN109917721 A CN 109917721A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 238000012806 monitoring device Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 230000003993 interaction Effects 0.000 claims abstract description 12
- 230000006855 networking Effects 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000006399 behavior Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 239000000523 sample Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention relates to a kind of mode of wireless transmission level monitoring device and methods, including main control unit, the main control unit connection liquid level sensor and human-computer interaction module, the main control unit are also connected with power amplifier input and power module, and the power amplifier output connects radio-frequency antenna；The power module is also connected with DC-DC boosting unit input terminal, and the DC-DC boosting unit output end connects the liquid level sensor, and DC-DC boosting unit enable end connects the main control unit.The present invention use ZigBee wireless communication technique, global general-use, holding equipment networking, access property it is good；Signal digitlization is acquired, transmission is stablized, and it is anti-interference strong, it supports compared with remote wireless transmission；Equipment volume is small, simple to install, non-maintaining, at low cost；Super low-power consumption, battery power supply, has advanced electric power management mechanism, highly-safe, stability is good；Difficulty of construction is small, and installation site is influenced small by surrounding enviroment.
Description
Technical field
The invention mainly relates to a kind of level monitoring device more particularly to a kind of mode of wireless transmission level monitoring devices.
Background technique
In dynamic environment monitoring industry, a kind of demand is the oil mass to the oil-fired power generating sump outside base station/computer room
It is monitored, to remind maintenance personnel to add fuel oil in time, while playing certain prison to situations such as stealing oil or impaired fuel tank
Survey effect.
Currently, common scheme is using throw-in type liquid level sensor (probe), throw-in type liquid level sensor is built into oil
Bottom portion, measurement data is by cable transmission to FSU (power & environment supervision system) host in base station/computer room.In the process,
Throw-in type liquid-level probe needs to power for a long time.
In actual use, above scheme haves the shortcomings that some obvious:
1, the monitored point of data accuracy influences at a distance from central machine room/monitoring host computer, and the length of cable can be to acquisition
Signal causes centainly to decay, and the remoter line loss of distance is bigger；
2, project amount is big, and construction cost is high, and transmission stability is not high；
3, it installs, wiring is affected by actual environment.
Summary of the invention
The technical problem to be solved by the present invention is to how accurately to be monitored to the liquid level of oil-fired power generating sump, mention simultaneously
The stability of high system and the portability of installation.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of mode of wireless transmission level monitoring dresses
It sets, it is characterised in that: including main control unit, the main control unit connection liquid level sensor and human-computer interaction module, the master control
Unit is also connected with power amplifier input and power module, and the power amplifier output connects radio-frequency antenna；The electricity
Source module is also connected with DC-DC boosting unit input terminal, and the DC-DC boosting unit output end connects the liquid level sensor, institute
It states DC-DC boosting unit enable end and connects the main control unit.
Preferably, the main control unit includes central processing unit, RF modem module, Zigbee protocol stack, power supply pipe
Unit and analog-digital converter are managed, the central processing unit connects the RF modem module, Zigbee protocol stack, power supply
Administrative unit and analog-digital converter；The central processing unit connects the human-computer interaction module, the RF modulation /demodulation list
Member connects the power amplifier, and the analog-digital converter connects the liquid level sensor, and the Power Management Unit connects
Connect the power module.
Preferably, the liquid level sensor uses throw-in type current mode liquid level sensor.
Preferably, the liquid level sensor is connected to the main control unit by two core wires.
Preferably, the power module includes battery and Voltage stabilizing module, and the battery connects the Voltage stabilizing module input terminal,
The Voltage stabilizing module output end connects the DC-DC boosting unit input terminal and the main control unit.
Preferably, the radio-frequency antenna is magnetic chuck antenna.
Preferably, the radio-frequency antenna connects discharge module.
Preferably, the human-computer interaction module includes operation button and working station indicator.
Preferably, the main control unit, power amplifier, power module and DC-DC boosting unit are set to one and resist
In quick-fried and waterproof sealing shell.
The present invention also provides a kind of mode of wireless transmission level monitoring methods, are supervised using such as above-mentioned mode of wireless transmission liquid level
Survey device, which is characterized in that step are as follows:
Step 1: liquid level sensor is placed in Devices to test；When powering on for the first time, main control unit executes self-checking behavior,
Including the initialization to Zigbee protocol stack, the frequency calibration to RF modem module, the zero point to analog-digital converter
Correction guarantees that equipment various functions are normal；
Step 2: triggering ZigBee executes networking request action, main control unit issues the request that networks every setting time
Wireless data packet, if there is host side response to allow to be added in the given threshold time, then it represents that successfully network；If the given threshold time
Afterwards, host side response is not received, then stops request action, equipment enters the sleep pattern of opposite low-power consumption；Period can pass through
Human-computer interaction module triggering repeats step 2；
Step 3: interval setting time, which is periodically executed in level monitoring and data, send process: master control after equipment networks successfully
Unit switches to timing mode and opens clocking capability, after the time reaches, enables DC-DC boosting unit, by power module output
It powers after boost in voltage for liquid level sensor, liquid level sensor steady operation after setting time, analog-digital converter is by several times
The analogue value of liquid level sensor output is read, and is sent to main control unit；Main control unit sends analog-digital converter
Data execute software filtering, and store；After the sample for collecting setting quantity, DC-DC boosting unit is closed；
Step 4: power amplifier is enabled, add by carrying out software via Zigbee protocol stack by filtered data
Close processing；RF modem module issues the digital signal modulated after encryption at electromagnetic wave simulation signal；Power amplification
Device carries out secondary amplification to the electromagnetic wave simulation signal, and is issued by antenna；
Step 5: acknowledgement mechanism is enabled, if recipient is not any in order to ensure data are correctly sent to recipient
Response, wireless data packet will be retransmitted；
Step 6: the electricity of Power Management Unit real-time detection power module, predicts the service life of power module；
Step 7: less radio-frequency function is closed, equipment entirety suspend mode, three are gone to step.
Compared with prior art, mode of wireless transmission level monitoring device provided by the invention has the following beneficial effects:
1, using work in the ZigBee 2.4GHz wireless communication technique of ISM band, global general-use marked using ZigBee
Quasi- agreement, holding equipment networking, access property are good；
2, acquisition signal digitlization, can play the role of accurate measurement to the amount of fuel of fuel tank, height of water level；Transmission is steady
It is fixed, it is anti-interference strong, it supports compared with remote wireless transmission, can support 300 meters of wireless transmissions under spacious environment；
3, equipment volume is small, simple to install, non-maintaining, at low cost；
4, super low-power consumption, battery power supply, has advanced electric power management mechanism, and the leakage current less than 1uA is highly-safe,
Stability is good；
5, difficulty of construction is small, and installation site is influenced small by surrounding enviroment.
Detailed description of the invention
The present invention is illustrated by way of example in attached drawing, is not intended to limit the present invention.Similar appended drawing reference refers to similar element.
Fig. 1 is the system block diagram of mode of wireless transmission level monitoring device provided in this embodiment.
Specific embodiment
With reference to detailed figure set forth herein and description, the disclosure can be best understood.
Fig. 1 is the system block diagram of mode of wireless transmission level monitoring device provided in this embodiment, the mode of wireless transmission
Level monitoring device is mainly by main control unit SoC (Silicon Labs EM357), power amplifier IC (SE2432L), radio frequency
The composition such as antenna, power supply, human-computer interaction module and liquid level sensor.Main control unit SoC connection power amplifier IC
(SE2432L), power amplifier IC (SE2432L) connection radio-frequency antenna, main control unit SoC be also connected with human-computer interaction module and
Liquid level sensor.
The input terminal of SE2432L power amplifier IC and the RF function of main control unit SoC (Silicon Labs EM357)
Foot is direct-connected, including TxN, TxP and RxN, RxP.The output end of SE2432L power amplifier IC is connect with radio-frequency antenna.
Main control unit SoC include central processing unit, RF modem module, Zigbee protocol stack, Power Management Unit and
Analog-digital converter ADC etc., central processing unit connect RF modem module, Zigbee protocol stack, Power Management Unit and
Analog-digital converter ADC, central processing unit are also connected with human-computer interaction module.
RF modem module connects SE2432L power amplifier IC, analog-digital converter ADC connection level sensing
Device.Power Management Unit connects power module, and Power Management Unit connects DC-DC (DC-DC) boosting unit input terminal,
DC-DC boosting unit output end connects liquid level sensor, powers for liquid level sensor.The enable end of DC-DC boosting unit connects
Main control unit SoC.
Main control unit SoC (Silicon Labs EM357) runs complete machine logical control program, including operation ZigBee association
It is real to discuss stack, the modulation and demodulation of radiofrequency signal and the built-in 12bit high-precision successive approximation simulation digital quantizer ADC of control
Now to the data acquisition function of liquid level sensor, while managing power supply of the whole machine mode.
The secondary amplification of the radiofrequency signal that SE2432L power amplifier IC sends main control unit EM357, raising radio transmission
Distance；Simultaneously in the receiving mode, the LNA (low-noise amplifier) of SE2432L power amplifier IC can be substantially reduced environment
Interference, enhancing and guarantee radio frequency reception quality.
Radio-frequency antenna uses magnetic chuck antenna, standard sub-miniature A connector.Radio-frequency antenna connects discharge module, has anti-lightning strike
Function.
Liquid level sensor uses throw-in type current mode liquid level sensor.Liquid level sensor uses two core wires, and cable terminations are used
Terminal attachment base is connected to main control unit SoC, easy to disassemble and replacement.
Power module includes battery and Voltage stabilizing module, and battery connects Voltage stabilizing module.Battery is primary using large capacity, high density
Property lithium battery, cell voltage 3.6V, through Voltage stabilizing module (LDO) pressure stabilizing to 3.3V be MCU power.
Human-computer interaction module includes operation button and indicator light, for ZigBee networking and software debugging, operating condition instruction.
The power supply of throw-in type current mode liquid level sensor need to pass through DC-DC boosting unit, and the input of DC-DC boosting unit is straight
It is connected to power module, i.e. 3.6V input.DC-DC boosting unit it is enabled with forbid by main control unit SoC (Silicon Labs
EM357 it) directly controls.
Main control unit SoC (Silicon Labs EM357), power amplifier IC (SE2432L), power module and DC-
DC boosting unit is set in the openable and closable shell of lid, and overall architecture is compact, and integrated level is high.
The application method of mode of wireless transmission level monitoring device provided in this embodiment is as follows:
Step 1: liquid level sensor is placed in Devices to test；When the system is first powered on, main control unit SoC (Silicon
Labs EM357) execution self-checking behavior, the frequency calibration including initialization and RF modem module to Zigbee protocol stack,
And the movement such as zero correction of internal high-precision ADC unit.After completing a series of actions, indicator light flashes 3 times, and prompt is set
Standby various functions are normal.
Step 2: button operation, triggering ZigBee executes networking request action, main control unit SoC (Silicon Labs
EM357 the wireless data packet for the request that networks, indicator light fast blink) were issued every 1 second.If period has host side response to allow to add
Enter, then it represents that successfully network, the indicator light is always on 3 seconds extinguishes；If after 10 seconds, do not receive host side response, then it is dynamic to stop request
Make, equipment enters low power sleep mode.Period button operation can trigger and repeat step 2.
Step 3: interval is periodically executed in level monitoring and data and send process for 5 minutes after equipment networks successfully.It is as follows: main
Control cell S oC (Silicon Labs EM357) switches to 1KHz low-frequency clock unit and opens clocking capability, and the purpose of frequency reducing is
Reduce power consumption.After time reaches, DC-DC boosting unit is enabled, is throw-in type current mode liquid by input 3.6V boost in voltage to 12V
Level sensor power supply.Throw-in type current mode liquid level sensor steady operation, high-precision ADC unit can be read several times after 2 seconds
The analogue value for taking liquid level sensor to export makes discarding for biggish numerical value is jumped, and after collecting enough samples, closes
DC-DC boosting unit is to save electric energy.The sample that main control unit SoC (Silicon Labs EM357) sends ADC unit
Software filtering is executed, further increases the authenticity and smoothness of data, also, nearest 128 samples are recorded to SoC's
In NVM nonvolatile storage.
Step 4: SE2432L power amplifier IC is enabled, the data after optimised via Zigbee protocol stack into
Row AES128 software cryptography processing, guarantees safety.RF modem module is by digital signal modulated at the electromagnetic wave of 2.4GHz
Analog signal issues.The secondary amplification of the radiofrequency signal that power amplifier IC issues main control unit EM357, raising radio transmission away from
From；
Step 5: acknowledgement mechanism is enabled, if recipient is not any in order to ensure data are correctly sent to recipient
Response, wireless data packet will be retransmitted, and maximum is attempted 5 times.
Step 6: Power Management Unit real-time detection battery capacity, predicts the information of service life.
Step 7: less radio-frequency function is closed, equipment entirety suspend mode, 3 are gone to step.
Mode of wireless transmission level monitoring device provided in this embodiment has a characteristic that on hardware
1, external independent power amplifier chip, maximum support 20dBm power output, meet single node and transmit at a distance.
2, mode of wireless transmission level monitoring device provided in this embodiment is mounted on outdoor more, and radio-frequency antenna part increases
Discharge tube circuit has anti-lightning strike function, guarantees the normal work that equipment is acquired under the adverse circumstances such as thunderstorm and strong electrical field.
3, crust of the device antiknock, the shell place of uncapping increase anti-aging sealing ring, meet waterproof sealing requirement.
Mode of wireless transmission level monitoring device provided in this embodiment functionally has a characteristic that
1, the other level error detection of grade, provides the angles of science monitoring management of fining, quantification for user；
2, electricity continuation of the journey detection and low-voltage alarm function are reduced periodically by wireless data packet remote transmission to existing
The workload of field maintenance；
3, dates back, local 128 records of maximum support.It supports data export, is analyzed for data.
Claims (10)
1. a kind of mode of wireless transmission level monitoring device, it is characterised in that: including main control unit, the main control unit connects liquid level
Sensor and human-computer interaction module, the main control unit are also connected with power amplifier input and power module, and the power is put
Big device output end connects radio-frequency antenna；The power module is also connected with DC-DC boosting unit input terminal, and the DC-DC boosting is single
First output end connects the liquid level sensor, and DC-DC boosting unit enable end connects the main control unit.
2. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the main control unit includes center
Processor, RF modem module, Zigbee protocol stack, Power Management Unit and analog-digital converter, the central processing
Device connects the RF modem module, Zigbee protocol stack, Power Management Unit and analog-digital converter；The centre
It manages device and connects the human-computer interaction module, the RF modem module connects the power amplifier, and the simulation numeral turns
Parallel operation connects the liquid level sensor, and the Power Management Unit connects the power module.
3. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the liquid level sensor is using throwing
Enter formula current mode liquid level sensor.
4. mode of wireless transmission level monitoring device as claimed in claim 1 or 3, it is characterised in that: the liquid level sensor is logical
It crosses two core wires and is connected to the main control unit.
5. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the power module includes battery
And Voltage stabilizing module, the battery connect the Voltage stabilizing module input terminal, the Voltage stabilizing module output end connects the DC-DC boosting
Unit input terminal and the main control unit.
6. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the radio-frequency antenna is magnetic inhales
Disk antenna.
7. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the radio-frequency antenna connection electric discharge
Module.
8. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the human-computer interaction module includes
Operation button and working station indicator.
9. mode of wireless transmission level monitoring device as described in claim 1, it is characterised in that: the main control unit, power are put
Big device, power module and DC-DC boosting unit are set in an antiknock and the shell of waterproof sealing.
10. a kind of mode of wireless transmission level monitoring method is filled using mode of wireless transmission level monitoring as claimed in claim 2
It sets, which is characterized in that step are as follows:
Step 1: liquid level sensor is placed in Devices to test；When powering on for the first time, main control unit executes self-checking behavior, including
Initialization, the frequency calibration to RF modem module, the zero correction to analog-digital converter to Zigbee protocol stack,
Guarantee that equipment various functions are normal；
Step 2: triggering ZigBee executes networking request action, main control unit issues the wireless of request that network every setting time
Data packet, if there is host side response to allow to be added in the given threshold time, then it represents that successfully network；If after the given threshold time,
Host side response is not received, then stops request action, equipment enters the sleep pattern of opposite low-power consumption；Period can be by man-machine
Interactive module triggering repeats step 2；
Step 3: interval setting time, which is periodically executed in level monitoring and data, send process: main control unit after equipment networks successfully
It switches to timing mode and opens clocking capability, after the time reaches, enable DC-DC boosting unit, the voltage that power module is exported
It powers after boosting for liquid level sensor, liquid level sensor steady operation after setting time, analog-digital converter is read by several times
The analogue value of liquid level sensor output, and it is sent to main control unit；The data that main control unit sends analog-digital converter
Software filtering is executed, and is stored；After the sample for collecting setting quantity, DC-DC boosting unit is closed；
Step 4: power amplifier is enabled, by being carried out at software cryptography by filtered data via Zigbee protocol stack
Reason；RF modem module issues the digital signal modulated after encryption at electromagnetic wave simulation signal；Power amplifier pair
The electromagnetic wave simulation signal carries out secondary amplification, and is issued by antenna；
Step 5: acknowledgement mechanism is enabled, if recipient does not have any sound in order to ensure data are correctly sent to recipient
It answers, wireless data packet will be retransmitted；
Step 6: the electricity of Power Management Unit real-time detection power module, predicts the service life of power module；
Step 7: less radio-frequency function is closed, equipment entirety suspend mode, three are gone to step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910279257.8A CN109917721A (en) | 2019-04-09 | 2019-04-09 | Mode of wireless transmission level monitoring device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910279257.8A CN109917721A (en) | 2019-04-09 | 2019-04-09 | Mode of wireless transmission level monitoring device and method |
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Family
ID=66969013
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| CN201910279257.8A Pending CN109917721A (en) | 2019-04-09 | 2019-04-09 | Mode of wireless transmission level monitoring device and method |
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Cited By (2)
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| CN111158275A (en) * | 2019-12-24 | 2020-05-15 | 浙江工业大学 | Level gauge read-write device based on BLE and Web server |
| CN114123981A (en) * | 2022-01-25 | 2022-03-01 | 深圳市大族光电设备有限公司 | Power amplifier monitoring method and power amplifying circuit |
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