CN106323411A - Water level pre-warning system based on internet of things technology - Google Patents

Water level pre-warning system based on internet of things technology Download PDF

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Publication number
CN106323411A
CN106323411A CN201610781370.2A CN201610781370A CN106323411A CN 106323411 A CN106323411 A CN 106323411A CN 201610781370 A CN201610781370 A CN 201610781370A CN 106323411 A CN106323411 A CN 106323411A
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CN
China
Prior art keywords
pole
amplifier
resistance
effect transistor
electric capacity
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Application number
CN201610781370.2A
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Chinese (zh)
Inventor
薛鸿雁
Original Assignee
成都东创精英科技有限公司
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Priority to CN201610781370.2A priority Critical patent/CN106323411A/en
Publication of CN106323411A publication Critical patent/CN106323411A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/14Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of pressure
    • G01F23/18Indicating, recording or alarm devices actuated electrically

Abstract

The invention discloses a water level pre-warning system based on internet of things technology, which is characterized by including a single chip microcomputer, a modulus conversion chip and a signal processing unit which are connected to the single chip microcomputer respectively, a water level sensor which is connected to the modulus conversion chip, a wireless transmission unit which is connected to the signal processing unit and an upper computer which is connected to the wireless transmission unit through a wireless network. The water level pre-warning system based on internet of things technology can process monitoring signals very well, thus making the monitoring signals received by the upper computer more stable, allowing workers to analyze river water levels more easily and accurately according to the monitoring signals, and improving the warning effect greatly.

Description

Water level early warning system based on technology of Internet of things
Technical field
The present invention relates to a kind of water level early warning system, specifically refer to a kind of water level early warning system based on technology of Internet of things.
Background technology
Hydrological monitoring equipment is equipment indispensable in water conservancy construction, and the water level in river course is monitored early warning is water Indispensable part in profit flood control work.Along with the development of technology of Internet of things, there has been based on Internet of Things The water level early warning system of network technology, the water level in monitoring river course that can be real-time by water level early warning system, and according to monitoring result There is the probability of flood in premise prediction, such that it is able to performed Emergency Preparedness before flood occurs, reduces loss.But it is existing Water level early warning system based on technology of Internet of things there is also the biggest defect, i.e. this water level early warning system cannot be well to prison Surveying signal to process, cause the monitoring jitter that receiving terminal receives, staff cannot be accurate according to monitoring signal River water level is analyzed, strong influence early warning effect.
Summary of the invention
It is an object of the invention to solve existing water level early warning system cannot well monitoring signal be processed, lead Cause the defect of the monitoring jitter that receiving terminal receives, it is provided that a kind of water level early warning system based on technology of Internet of things.
The purpose of the present invention by following technical proposals reality: water level early warning system based on technology of Internet of things, mainly by Single-chip microcomputer, the modulus conversion chip being connected with single-chip microcomputer respectively and signal processing unit, it is connected with modulus conversion chip Level sensor, the wireless transmission unit being connected with signal processing unit, and by wireless network and wireless transmission unit The host computer composition being connected.Described signal processing unit is by amplifier P1, amplifier P2, amplifier P3, N pole and amplifier P1 The diode D1 that positive pole is connected, P pole is connected with single-chip microcomputer, be serially connected in the electricity between negative pole and the outfan of amplifier P1 Resistance R1, N pole is connected with the outfan of amplifier P1, P pole is connected with the positive pole of amplifier P2 diode D2, one end with put The negative pole of big device P2 is connected, the resistance R2 of other end ground connection, is serially connected in outfan and the positive pole of amplifier P3 of amplifier P2 Between resistance R3, P pole ground connection, the diode D1 that is connected of N pole negative pole with amplifier P3 after resistance R4, positive pole and amplification The electric capacity C1 that the positive pole of device P3 is connected, negative pole is connected with the outfan of amplifier P3, the resistance R5 being in parallel with electric capacity C1, The constant-current source circuit being connected with the outfan of amplifier P1, P pole is connected with the outfan of amplifier P3, N pole is through resistance R8 The diode D3 being connected with constant-current source circuit afterwards, and the pulse modulate circuit composition being connected with constant-current source circuit;Described The outfan of pulse modulate circuit is connected with wireless transmission unit.
Further, described constant-current source circuit is by field effect transistor MOS1, field effect transistor MOS2, one end and field effect transistor MOS1 Grid be connected, the resistance R7 of another termination power, and be serially connected in drain electrode and field effect transistor MOS2 of field effect transistor MOS1 Source electrode between potentiometer R6 composition;The source electrode of described field effect transistor MOS1 is connected with the outfan of amplifier P1, its grid Pole is connected with the drain electrode of field effect transistor MOS2, its drain electrode is connected with the grid of field effect transistor MOS2;Described field effect transistor The source electrode of MOS2 is connected with pulse modulate circuit, its drain electrode is then connected with the control end of potentiometer R6;Described field effect transistor The source electrode of MOS2 also after resistance R8 N pole with diode D3 be connected..
Described pulse modulate circuit is connected with the base stage of audion VT1, just by audion VT1, audion VT2, negative pole The electric capacity C2 that pole is then connected with the source electrode of field effect transistor MOS2, positive pole is connected with the positive pole of electric capacity C2, the electricity of minus earth Hold that C3, P pole is connected with the colelctor electrode of audion VT1, N pole colelctor electrode with audion VT2 after resistance R11 is connected two Pole pipe D5, the electric capacity that negative pole is connected with the base stage of audion VT2, positive pole positive pole with electric capacity C3 after resistance R9 is connected The Zener diode D4 that C4, N pole is connected with the emitter stage of audion VT1, P pole is connected with the negative pole of electric capacity C3, is serially connected in Resistance R10, P pole between base stage and the negative pole of electric capacity C3 of audion VT2 is connected with the negative pole of electric capacity C3, N pole is through resistance The diode D6 that after R12, emitter stage with audion VT2 is connected, forward end is connected with the colelctor electrode of audion VT2, reversely The not gate A that end is connected with wireless transmission unit after resistance R13, and the backward end of positive pole NAND gate A is connected, negative pole connects The electric capacity C5 composition on ground.
Described field effect transistor MOS1 and field effect transistor MOS2 are 2SK389BL type field effect transistor.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) monitoring signal can well be processed, so that the monitoring signal that host computer receives is more by the present invention Add stable, so that river water level can be preferably analyzed according to monitoring signal by staff accurately, carry greatly The high early warning effect of the present invention.
(2) present invention uses signal processing unit to process monitoring signal, and this signal processing unit can be to signal Waveform carries out amplitude limit, the interference of prune wave tops or bottom, makes monitoring signal more stable, thus improves host computer and receive Monitoring signal stability.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the signal processing unit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to This.
Embodiment
As it is shown in figure 1, the present invention is mainly by single-chip microcomputer, at the modulus conversion chip being connected with single-chip microcomputer respectively and signal Reason unit, the level sensor being connected with modulus conversion chip, the wireless transmission unit being connected with signal processing unit, with And the host computer being connected with wireless transmission unit by wireless network is formed.
This level sensor for gathering the water level signal in river course, its by Pipe installing in water, level sensor Being to affect the result of level measuring to prevent water from flowing by Pipe installing, this installation method has been ripe technology, The most do not do and too much repeat;This level sensor uses AL200W type pressure resistance type level sensor, this AL200W type pressure resistance type water The hydrostatic pressure being directly proportional to the liquid level degree of depth is accurately measured by level sensor, and is converted into standard analog signal output, Set up the linear corresponding relation of output signal and liquid depth, such that it is able to measure the level sensor end liquid to liquid level Position height.
This single-chip microcomputer, modulus conversion chip, signal processing unit and wireless transmission unit are then integrated in an equipment In installation case, this equipment is installed case and is then arranged on bank.The water level mould that level sensor can be exported by this modulus conversion chip Intending signal and be converted to water level digital signal, it uses ADC0809 modulus conversion chip to realize, this ADC0809 analog digital conversion core The analog input end IN0 pin of sheet is connected with level sensor.This single-chip microcomputer is then the control processing center of the present invention, its AT89S51 single-chip microcomputer is used to realize, the P1.0 signal input tube foot of this AT89S51 single-chip microcomputer and ADC0809 analog digital conversion core Digital output end 21 pin of sheet is connected, and its P3.1 signal output pin is then connected with signal processing unit.This signal Water level digital signal can be processed by processing unit, and its outfan is connected with the signal input part of wireless transmission unit. This wireless transport module for by water level digital signal by wireless network transmissions to host computer, it uses ZIGBEE to be wirelessly transferred Module realizes.Host computer is existing computer system, and the water level signal received can be analyzed and show by it.
In order to preferably water level digital signal be processed, as in figure 2 it is shown, this signal processing unit is by amplifier P1, Amplifier P2, amplifier P3, N pole and the diode D1 that positive pole is connected, P pole is connected with single-chip microcomputer of amplifier P1, concatenate Resistance R1, N pole between the negative pole and outfan of amplifier P1 is connected with the outfan of amplifier P1, P pole and amplifier The diode D2 that the positive pole of P2 is connected, one end is connected with the negative pole of amplifier P2, the resistance R2 of other end ground connection, is serially connected in Resistance R3, P pole ground connection between outfan and the positive pole of amplifier P3 of amplifier P2, N pole after resistance R4 with amplifier P3 The diode D1 that is connected of negative pole, positive pole is connected with the positive pole of amplifier P3, negative pole is connected with the outfan of amplifier P3 The electric capacity C1 connect, the resistance R5 being in parallel with electric capacity C1, the constant-current source circuit being connected with the outfan of amplifier P1, P pole with The diode D3 that the outfan of amplifier P3 is connected, N pole is connected with constant-current source circuit after resistance R8, and and constant-current source The pulse modulate circuit composition that circuit is connected.The outfan of described pulse modulate circuit is connected with wireless transmission unit.
This amplifier P2, amplifier P3, resistance R3, and diode D3 form amplitude limiting amplifier circuit;This limited range enlargement electricity Can effectively prune the interference of wave tops or bottom in road.Electric capacity C1 plays frequency compensation effect when amplitude limit, thus Make water level digital signal more stable.
Wherein, constant-current source circuit by field effect transistor MOS1, field effect transistor MOS2, the grid phase of one end and field effect transistor MOS1 Connect, the resistance R7 of another termination power, and be serially connected in the drain electrode of field effect transistor MOS1 and field effect transistor MOS2 source electrode it Between potentiometer R6 composition.The source electrode of described field effect transistor MOS1 is connected with the outfan of amplifier P1, and its grid is imitated with field Should the drain electrode of pipe MOS2 be connected, its drain electrode is connected with the grid of field effect transistor MOS2.The source electrode of described field effect transistor MOS2 Being connected with pulse modulate circuit, its drain electrode is then connected with the control end of potentiometer R6.The source electrode of described field effect transistor MOS2 Also after resistance R8, N pole with diode D3 is connected.This constant-current source circuit can be that signal processing unit provides constant electricity Stream, it need not adjust the most available positive and negative identical current characteristics.In order to reach more preferable effect, described field effect transistor MOS1 and Field effect transistor MOS2 all uses 2SK389BL type field effect transistor to realize.
It addition, this pulse modulate circuit is by audion VT1, audion VT2, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, Zener diode D4, diode D5, diode D6 and non- Door A.
During connection, the negative pole of electric capacity C2 is connected with the base stage of audion VT1, positive pole then with the source electrode of field effect transistor MOS2 It is connected.The positive pole of electric capacity C3 is connected with the positive pole of electric capacity C2, minus earth.The P pole of diode D5 and the collection of audion VT1 Electrode is connected, and N pole colelctor electrode with audion VT2 after resistance R11 is connected.The negative pole of electric capacity C4 is with audion VT2's Base stage is connected, and positive pole positive pole with electric capacity C3 after resistance R9 is connected.The N pole of Zener diode D4 is with audion VT1's Emitter stage is connected, and P pole is connected with the negative pole of electric capacity C3.Resistance R10 is serially connected in the base stage of audion VT2 and the negative of electric capacity C3 Between pole.The P pole of diode D6 is connected with the negative pole of electric capacity C3, N pole after resistance R12 with the emitter stage phase of audion VT2 Connect.The forward end of not gate A is connected with the colelctor electrode of audion VT2, backward end after resistance R13 with wireless transmission unit phase Connect.The backward end of positive pole NAND gate A of electric capacity C5 is connected, minus earth.
Wherein, electric capacity C3 and resistance R9 constitutes RC filter circuit, and interference signal can be filtered by this RC filter circuit. This audion VT1, audion VT2, diode D5, resistance R11, not gate A and electric capacity C5 are then collectively forming modulate circuit, this tune The waveform of monitoring signal can further be processed by reason circuit, makes monitoring signal more stable.
Water level signal is more stable after signal processing unit processes, thus improves the monitoring signal that host computer receives Stability.
During work, this level sensor gathers the water level signal in river course and is transferred to modulus conversion chip, and this modulus turns Changing chip water level signal is converted into digital signal to be sent to single-chip microcomputer, water level signal is transferred to signal processing list by single-chip microcomputer Unit, water level signal is sent to host computer by wireless network by this wireless transmission unit, and water level signal is carried out point by this host computer Analysis, display, river water level situation is then judged by staff according to monitoring result, if any the possibility of generation flood, then carries Before perform Emergency Preparedness.
As it has been described above, just can well realize the present invention.

Claims (4)

1. water level early warning system based on technology of Internet of things, it is characterised in that: main by single-chip microcomputer, it is connected with single-chip microcomputer respectively Modulus conversion chip and signal processing unit, the level sensor being connected with modulus conversion chip, with signal processing unit The wireless transmission unit being connected, and the host computer composition being connected with wireless transmission unit by wireless network;Described letter Number processing unit is by amplifier P1, amplifier P2, and amplifier P3, N pole is connected with the positive pole of amplifier P1, P pole and single-chip microcomputer The output of the diode D1 being connected, resistance R1, the N pole being serially connected between negative pole and the outfan of amplifier P1 and amplifier P1 The diode D2 that end is connected, P pole is connected with the positive pole of amplifier P2, one end is connected with the negative pole of amplifier P2, another The resistance R2 of end ground connection, resistance R3, the P pole ground connection being serially connected between the outfan of amplifier P2 and the positive pole of amplifier P3, N pole The diode D1 that negative pole with amplifier P3 is connected after resistance R4, positive pole is connected with the positive pole of amplifier P3, negative pole with The electric capacity C1 that the outfan of amplifier P3 is connected, the resistance R5 being in parallel with electric capacity C1, be connected with the outfan of amplifier P1 The constant-current source circuit connect, P pole is connected with the outfan of amplifier P3, N pole is connected with constant-current source circuit after resistance R8 Diode D3, and the pulse modulate circuit composition being connected with constant-current source circuit;The outfan of described pulse modulate circuit with Wireless transmission unit is connected.
Water level early warning system based on technology of Internet of things the most according to claim 1, it is characterised in that: described constant-current source electricity Route field effect transistor MOS1, field effect transistor MOS2, one end is connected with the grid of field effect transistor MOS1, the electricity of another termination power Resistance R7, and the potentiometer R6 composition being serially connected between the drain electrode of field effect transistor MOS1 and the source electrode of field effect transistor MOS2;Described The source electrode of field effect transistor MOS1 is connected with the outfan of amplifier P1, its grid is connected with the drain electrode of field effect transistor MOS2, Its drain electrode is connected with the grid of field effect transistor MOS2;The source electrode of described field effect transistor MOS2 is connected with pulse modulate circuit, Its drain electrode is then connected with the control end of potentiometer R6;The source electrode of described field effect transistor MOS2 also after resistance R8 with diode D3 N pole be connected.
Water level early warning system based on technology of Internet of things the most according to claim 2, it is characterised in that: described pulse is nursed one's health Circuit by audion VT1, audion VT2, negative pole is connected with the base stage of audion VT1, positive pole then with field effect transistor MOS2 The electric capacity C2 that source electrode is connected, positive pole is connected with the positive pole of electric capacity C2, electric capacity C3, the P pole of minus earth and audion VT1 The diode D5 that colelctor electrode is connected, N pole colelctor electrode with audion VT2 after resistance R11 is connected, negative pole and audion Electric capacity C4, the N pole that the base stage of VT2 is connected, positive pole positive pole with electric capacity C3 after resistance R9 is connected is sent out with audion VT1's The Zener diode D4 that emitter-base bandgap grading is connected, P pole is connected with the negative pole of electric capacity C3, is serially connected in base stage and the electric capacity of audion VT2 Resistance R10, P pole between the negative pole of C3 is connected with the negative pole of electric capacity C3, N pole after resistance R12 with the transmitting of audion VT2 The diode D6 that pole is connected, forward end is connected with the colelctor electrode of audion VT2, backward end after resistance R13 with wireless biography The not gate A that defeated unit is connected, and the backward end of positive pole NAND gate A is connected, the electric capacity C5 of minus earth composition.
Water level early warning system based on technology of Internet of things the most according to claim 3, it is characterised in that: described field effect transistor MOS1 and field effect transistor MOS2 are 2SK389BL type field effect transistor.
CN201610781370.2A 2016-08-30 2016-08-30 Water level pre-warning system based on internet of things technology CN106323411A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042002A (en) * 2020-02-14 2020-04-21 山东博远重工有限公司 Bridge template placement platform system and method based on Internet of things

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CN203288021U (en) * 2012-11-20 2013-11-13 天津职业技术师范大学 Forest fire wireless sensor alarming node device with GPS positioning function
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Publication number Priority date Publication date Assignee Title
CN101226699A (en) * 2008-02-01 2008-07-23 吉林大学 System for recognition and examination of human body acupuncture points
CN201402520Y (en) * 2009-05-14 2010-02-10 长安大学 Bridge strain collecting instrument based on wireless sensing network interface
CN101726743A (en) * 2010-01-06 2010-06-09 南京信息工程大学 Vehicle active collision-preventing and positioning navigation device
CN103134737A (en) * 2012-11-08 2013-06-05 中国科学院寒区旱区环境与工程研究所 Measuring method and device of glacier and ice and snow density
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042002A (en) * 2020-02-14 2020-04-21 山东博远重工有限公司 Bridge template placement platform system and method based on Internet of things

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