CN105825676B - A kind of road vehicles traveling monitoring system based on Internet of Things - Google Patents
A kind of road vehicles traveling monitoring system based on Internet of Things Download PDFInfo
- Publication number
- CN105825676B CN105825676B CN201610357451.XA CN201610357451A CN105825676B CN 105825676 B CN105825676 B CN 105825676B CN 201610357451 A CN201610357451 A CN 201610357451A CN 105825676 B CN105825676 B CN 105825676B
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
- H03F3/16—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with field-effect devices
Abstract
The present invention relates to a kind of, and the road vehicles based on Internet of Things travel monitoring system; including monitoring center, detection unit, wireless communication unit and protection alarm unit; the detection unit, wireless communication unit and protection alarm unit are electrically connected with monitoring center; in the road vehicles traveling monitoring system based on Internet of Things; ultrasonic sensing is carried out by vehicle of the ultrasonic detector to process; it joined electromagnetic coil simultaneously; for carrying out electromagnetic induction to fireballing vehicle; to guarantee the reliability responded to vehicle, the monitoring capacity of monitoring system is improved；Moreover, in signal amplification circuit, output signal is fed back by the feed circuit that the 7th resistance and the 5th capacitor form, to change the partial pressure value of adjustable resistance, to one stage signal amplifying circuit amplification factor of the control based on field-effect tube, the reliability for improving signal amplification, improves the reliability of monitoring system.
Description
Technical field
The present invention relates to a kind of, and the road vehicles based on Internet of Things travel monitoring system.
Background technique
With the continuous improvement of modern science and technology level, various advanced monitoring systems also constantly occur, existing
Preventing road monitoring system in, also have the system of a set of road pavement vehicle driving monitoring.
It is generally only the vehicle that front is detected using ultrasonic detector, then in the vehicle driving monitoring system
It is shot and is tracked by camera, and if the speed of automobile is sufficiently fast, often it is not easy to take, to reduce
The monitoring capacity of system；Moreover, it in signal acquisition of the host to detection, is typically necessary and passes through signal amplification circuit
Processing is amplified to signal, guarantees the reliability of signal acquisition, and since current signal amplification circuit can be because of signal
Amplify too much, to cause the distortion of signal, reduces the reliability of system.
Summary of the invention
The technical problem to be solved by the present invention is for overcome the deficiencies in the prior art, provide a kind of based on Internet of Things
Road vehicles travel monitoring system.
The technical solution adopted by the present invention to solve the technical problems is: a kind of road vehicles traveling prison based on Internet of Things
Control system, including monitoring center, detection unit, wireless communication unit and protection alarm unit, the detection unit, wireless telecommunications
Unit and protection alarm unit are electrically connected with monitoring center；
The detection unit includes electromagnetic coil, pressure sensor, ultrasonic detector and high-definition camera, the electromagnetism
Coil, pressure sensor, ultrasonic detector and high-definition camera are connect with monitoring center；
The wireless communication unit includes bluetooth and intelligent communication terminal, and the monitoring center passes through bluetooth and intelligent communication
Terminal connection；
The protection alarm unit includes combined aural and visual alarm, temperature sensor, humidity sensor, current transformer and voltage
Mutual inductor, the combined aural and visual alarm, temperature sensor, humidity sensor, current transformer and voltage transformer are and in monitoring
Electrocardio connection；
The monitoring center includes host, the Communication Gateway connecting with host, Short Message Service Gateway, database server and Web
Server, the detection unit, wireless communication unit and protection alarm unit are electrically connected with host；
Signal amplification module is equipped in the host, the detection unit is electrically connected with signal amplification module, the signal
Amplification module includes signal amplification circuit, and the signal amplification circuit includes first capacitor, the second capacitor, third capacitor, the 4th
Capacitor, the 5th capacitor, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance,
Field-effect tube, the first triode and adjustable resistance, the grid of the field-effect tube are connect with first capacitor, the field-effect tube
Grid is grounded by first resistor, and the drain electrode of the field-effect tube is grounded by adjustable resistance, and the source electrode of the field-effect tube is logical
The external 5V DC voltage power supply of second resistance is crossed, the source electrode of the field-effect tube passes through the base stage of the second capacitor and the first triode
Connection, the external 5V direct current piezoelectricity of series circuit that the source electrode of the field-effect tube is made up of the second capacitor and 3rd resistor
Source, the series circuit ground connection that the source electrode of the field-effect tube is made up of the second capacitor and the 4th resistance, first triode
The parallel circuit ground connection that is made up of the 6th resistance and third capacitor of emitter, the collector of first triode passes through the
The external 5V DC voltage power supply of five resistance, the string that the collector of first triode is made up of the 7th resistance and the 5th capacitor
The adjustable end for joining circuit and adjustable resistance connects, the collector and the 4th capacitance connection of first triode.
Preferably, the installation mode of connection of two-wire system pressure sensor is simple, so that the practicability of system is improved, institute
Stating pressure sensor is two-wire system pressure sensor.
Preferably, trifluoro lithium battery has the characteristics that capacity is big, to ensure that the sustainable work of ultrasonic detector
Make ability, battery is equipped in the ultrasonic detector, the battery is trifluoro lithium battery.
Preferably, wide-angle high-definition camera has the characteristics that shooting angle is wide, so that the reliability of system is improved, institute
Stating high-definition camera is wide-angle high-definition camera.
Preferably, the host is PLC.
Preferably, the temperature sensor is contact type temperature sensor.
Preferably, the precision of resistance-type lithium chloride hygrometer is high and cheap, the practical value of system, institute are improved
Stating humidity sensor is resistance-type lithium chloride hygrometer.
Preferably, adding a padded voltage at the adjustable end of integrated circuit, realizes output voltage and be continuously adjusted, from
And realize the practicability of working power module, wherein the voltage value of output voltage is equal to the fixation output voltage of integrated circuit
The voltage value of the base terminal of value and the second triode, the voltage value of the base terminal of the second triode, which then passes through, changes the 9th resistance
Resistance value can be realized change, be equipped with working power module in the host, and the working power module includes working power circuit,
The working power circuit includes integrated circuit, first diode, the second diode, the second triode, the 8th resistance, the 9th electricity
The input terminal of resistance, the 6th capacitor and the 7th capacitor, the model 7800 of the integrated circuit, the integrated circuit passes through the 6th electricity
Hold ground connection, the input terminal of the integrated circuit and the cathode of first diode connect, the output end of the integrated circuit and first
The anode of diode connects, and the output end of the integrated circuit is connect by the series circuit that the 8th resistance and the 9th resistance form
Ground, the grounded collector of second triode, the base stage of second triode connect with the 8th resistance and the 9th resistance respectively
It connects, the emitter of second triode and the adjustable end of integrated circuit connect, the output end of the integrated circuit and the two or two
The cathode of pole pipe connects, and the anode of second diode is connect with the 8th resistance and the 9th resistance respectively, the integrated circuit
Output end pass through the 7th capacity earth.
The invention has the advantages that should be visited based in the road vehicles traveling monitoring system of Internet of Things by ultrasonic wave
It surveys device and ultrasonic sensing is carried out to the vehicle of process, while joined electromagnetic coil, for carrying out electromagnetism to fireballing vehicle
Induction improves the monitoring capacity of monitoring system to guarantee the reliability responded to vehicle；Moreover, amplify electricity in signal
Lu Zhong feeds back output signal by the feed circuit that the 7th resistance and the 5th capacitor form, to change adjustable resistance
Partial pressure value, so that one stage signal amplifying circuit amplification factor of the control based on field-effect tube, improves the reliable of signal amplification
Property, improve the reliability of monitoring system.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the road vehicles traveling monitoring system of the invention based on Internet of Things；
Fig. 2 is the structural schematic diagram of the monitoring center of the road vehicles traveling monitoring system of the invention based on Internet of Things；
Fig. 3 is the circuit theory of the signal amplification circuit of the road vehicles traveling monitoring system of the invention based on Internet of Things
Figure；
Fig. 4 is the circuit theory of the working power circuit of the road vehicles traveling monitoring system of the invention based on Internet of Things
Figure；
In figure: 1. electromagnetic coils, 2. pressure sensors, 3. ultrasonic detectors, 4. high-definition cameras, 5. intelligent communications are whole
End, 6. bluetooths, 7. monitoring centers, 8. combined aural and visual alarms, 9. temperature sensors, 10. humidity sensors, 11. current transformers,
12. voltage transformer, 13. hosts, 14. Communication Gateways, 15. Short Message Service Gateway, 16. database servers, 17.Web server,
U1. integrated circuit, R1. first resistor, R2. second resistance, R3. 3rd resistor, the 4th resistance of R4., the 5th resistance of R5., R6.
Six resistance, the 7th resistance of R7., the 8th resistance of R8., the 9th resistance of R9., RP1. adjustable resistance, D1. first diode, D2. second
Diode, Q1. field-effect tube, the first triode of Q2., the second triode of Q3., C1. first capacitor, the second capacitor of C2., C3.
Three capacitors, the 4th capacitor of C4., the 5th capacitor of C5., the 6th capacitor of C6., the 7th capacitor of C7..
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As Figure 1-Figure 4, a kind of road vehicles based on Internet of Things travel monitoring system, including monitoring center 7, detection
Unit, wireless communication unit and protection alarm unit, the detection unit, wireless communication unit and protection alarm unit with prison
Control center 7 is electrically connected；
The detection unit includes electromagnetic coil 1, pressure sensor 2, ultrasonic detector 3 and high-definition camera 4, described
Electromagnetic coil 1, pressure sensor 2, ultrasonic detector 3 and high-definition camera 4 are connect with monitoring center 7；
The wireless communication unit includes bluetooth 6 and intelligent communication terminal 5, and the monitoring center 7 passes through bluetooth 6 and intelligence
Communicating terminal 5 connects；
The protection alarm unit includes combined aural and visual alarm 8, temperature sensor 9, humidity sensor 10, current transformer 11
With voltage transformer 12, the combined aural and visual alarm 8, temperature sensor 9, humidity sensor 10, current transformer 11 and voltage are mutual
Sensor 12 is electrically connected with monitoring center 7；
The monitoring center 7 includes host 13, the Communication Gateway 14 connecting with host 13, Short Message Service Gateway 15, database clothes
Business device 16 and Web server 17, the detection unit, wireless communication unit and protection alarm unit are electrically connected with host 13；
Signal amplification module is equipped in the host 13, the detection unit is electrically connected with signal amplification module, the letter
Number amplification module includes signal amplification circuit, and the signal amplification circuit includes first capacitor C1, the second capacitor C2, third capacitor
C3, the 4th capacitor C4, the 5th capacitor C5, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, the 7th resistance R7, field-effect tube Q1, the first triode Q2 and adjustable resistance RP1, the field-effect tube Q1
Grid connect with first capacitor C1, the grid of the field-effect tube Q1 is grounded by first resistor R1, the field-effect tube Q1
Drain electrode be grounded by adjustable resistance RP1, the source electrode of the field-effect tube Q1 passes through the external 5V direct current piezoelectricity of second resistance R2
The source electrode in source, the field-effect tube Q1 is connect by the second capacitor C2 with the base stage of the first triode Q2, the field-effect tube Q1
The external 5V DC voltage power supply of series circuit that is made up of the second capacitor C2 and 3rd resistor R3 of source electrode, the field-effect tube
The series circuit ground connection that the source electrode of Q1 is made up of the second capacitor C2 and the 4th resistance R4, the emitter of the first triode Q2
The parallel circuit ground connection being made up of the 6th resistance R6 and third capacitor C3, the collector of the first triode Q2 pass through the 5th
The collector of the external 5V DC voltage power supply of resistance R5, the first triode Q2 passes through the 7th resistance R7 and the 5th capacitor C5 group
At series circuit connect with the adjustable end of adjustable resistance RP1, the collector of the first triode Q2 and the 4th capacitor C4 connect
It connects.
Preferably, the installation mode of connection of two-wire system pressure sensor is simple, so that the practicability of system is improved, institute
Stating pressure sensor 2 is two-wire system pressure sensor.
Preferably, trifluoro lithium battery has the characteristics that capacity is big, to ensure that the sustainable work of ultrasonic detector 3
Make ability, battery is equipped in the ultrasonic detector 3, the battery is trifluoro lithium battery.
Preferably, wide-angle high-definition camera has the characteristics that shooting angle is wide, so that the reliability of system is improved, institute
Stating high-definition camera 4 is wide-angle high-definition camera.
Preferably, the host 13 is PLC.
Preferably, the temperature sensor 9 is contact type temperature sensor.
Preferably, the precision of resistance-type lithium chloride hygrometer is high and cheap, the practical value of system, institute are improved
Stating humidity sensor 10 is resistance-type lithium chloride hygrometer.
Preferably, adding a padded voltage at the adjustable end of integrated circuit U1, realizes output voltage and is continuously adjusted,
To realize the practicability of working power module, wherein fixed output of the voltage value of output voltage equal to integrated circuit U1
The voltage value of the base terminal of voltage value and the second triode Q3, the voltage value of the base terminal of the second triode Q3 then pass through change
The resistance value of nine resistance R9 can be realized change, be equipped with working power module in the host 13, the working power module includes
Working power circuit, the working power circuit include integrated circuit U1, first diode D1, the second diode D2, the two or three
Pole pipe Q3, the 8th resistance R8, the 9th resistance R9, the 6th capacitor C6 and the 7th capacitor C7, the model of the integrated circuit U1
The input terminal of 7800, the integrated circuit U1 are grounded by the 6th capacitor C6, the input terminal and the one or two of the integrated circuit U1
The cathode of pole pipe D1 connects, and the output end of the integrated circuit U1 is connect with the anode of first diode D1, the integrated circuit
The series circuit ground connection that the output end of U1 is made up of the 8th resistance R8 and the 9th resistance R9, the current collection of the second triode Q3
Pole ground connection, the base stage of the second triode Q3 are connect with the 8th resistance R8 and the 9th resistance R9 respectively, second triode
The emitter of Q3 is connect with the adjustable end of integrated circuit U1, the cathode of the output end of the integrated circuit U1 and the second diode D2
Connection, the anode of the second diode D2 are connect with the 8th resistance R8 and the 9th resistance R9 respectively, the integrated circuit U1's
Output end is grounded by the 7th capacitor C7.
In the road vehicles traveling monitoring system based on Internet of Things:
Monitoring center 7 improves the intelligence of system for controlling each unit.Wherein, host 13 is for controlling
Modules processed ensure that the normal operation of system；Communication Gateway 14 guarantees the network communication of system for realizing communication connection
Reliability；Short Message Service Gateway 15 guarantees the safety travelled to car owner for carrying out short message prompt；Database server 16 is for being
System provides data service, improves the reliability of system；Web server 17 enables to use for providing the user with Web service
Family understands the travel situations of oneself in real time, to improve the practicability of system.
Detection unit is detected for road pavement workshop.Wherein, electromagnetic coil 1 is placed in ground, for process
Vehicle carries out electromagnetic induction, to guarantee to carry out most Fast Time Response to vehicle；Pressure sensor 2, for the vehicle to process into
Row weight detecting；Ultrasonic detector 3 is used to carry out ultrasonic sensing by vehicle of the ultrasonic wave to process, further improves
Tracking response to vehicle；High-definition camera 4 is used to carry out video monitoring to the vehicle of process.
Protection alarm unit is for monitoring the working environment of monitoring center 7 in real time, so that improve system can
By property.Wherein, combined aural and visual alarm 8 is for carrying out sound-light alarm, to improve the reliability of system；Temperature sensor 9 is used for
The temperature of each equipment of monitoring center 7 is measured in real time, to guarantee that 7 each section working environment of monitoring center is reliable；It is wet
Degree sensor 10 is for being measured in real time the humidity of 7 each section of monitoring center, to guarantee each equipment work of monitoring center 7
It is reliable to make environment；Current transformer 11 is for being measured in real time the operating current of each equipment in monitoring center 7, to protect
The reliability of each equipment work is demonstrate,proved；Voltage transformer 12 is used to carry out the operating voltage of each equipment in monitoring center 7
Real-time detection, to ensure that the reliability of each equipment work.
In the road vehicles traveling monitoring system based on Internet of Things, signal amplification module is for the detection to detection unit
Signal is reliably amplified, and the reliability of system is improved.Wherein, in signal amplification circuit, by based on field-effect tube Q1
One stage signal amplifying circuit carry out signal amplification, carry out letter using the second signal amplifying circuit based on the first triode Q2
Number amplification, thus ensure that detection signal amplification.Meanwhile the feed circuit being made up of the 7th resistance R7 and the 5th capacitor C5
Output signal is fed back, the level-one based on field-effect tube Q1 is controlled by changing the partial pressure value of adjustable resistance RP1 and is believed
Number amplifying circuit amplification factor, to improve the reliability of signal amplification.
Compared with prior art, ultrasonic detector 3 should be passed through based in the road vehicles traveling monitoring system of Internet of Things
Ultrasonic sensing is carried out to the vehicle of process, while joined electromagnetic coil 1, for carrying out electromagnetism sense to fireballing vehicle
It answers, to guarantee the reliability responded to vehicle, improves the monitoring capacity of monitoring system；Moreover, in signal amplification circuit
In, output signal is fed back by the feed circuit that the 7th resistance R7 and the 5th capacitor C5 is formed, to change adjustable resistance
The partial pressure value of RP1, so that one stage signal amplifying circuit amplification factor of the control based on field-effect tube Q1, improves signal amplification
Reliability, improve the reliability of monitoring system.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (8)
1. a kind of road vehicles based on Internet of Things travel monitoring system, which is characterized in that single including monitoring center (7), detection
Member, wireless communication unit and protection alarm unit, the detection unit, wireless communication unit and protection alarm unit with monitoring
Center (7) electrical connection；
The detection unit includes electromagnetic coil (1), pressure sensor (2), ultrasonic detector (3) and high-definition camera (4),
The electromagnetic coil (1), pressure sensor (2), ultrasonic detector (3) and high-definition camera (4) connect with monitoring center (7)
It connects；
The wireless communication unit includes bluetooth (6) and intelligent communication terminal (5), the monitoring center (7) by bluetooth (6) with
Intelligent communication terminal (5) connection；
The protection alarm unit includes combined aural and visual alarm (8), temperature sensor (9), humidity sensor (10), current transformer
(11) and voltage transformer (12), the combined aural and visual alarm (8), temperature sensor (9), humidity sensor (10), Current Mutual Inductance
Device (11) and voltage transformer (12) are electrically connected with monitoring center (7)；
Communication Gateway (14), Short Message Service Gateway (15), the number that the monitoring center (7) includes host (13), connect with host (13)
According to library server (16) and Web server (17), the detection unit, wireless communication unit and protection alarm unit are and host
(13) it is electrically connected；
Signal amplification module is equipped in the host (13), the detection unit is electrically connected with signal amplification module, the signal
Amplification module includes signal amplification circuit, and the signal amplification circuit includes first capacitor (C1), the second capacitor (C2), third electricity
Hold (C3), the 4th capacitor (C4), the 5th capacitor (C5), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th
Resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), field-effect tube (Q1), the first triode (Q2) and
The grid of adjustable resistance (RP1), the field-effect tube (Q1) is connect with first capacitor (C1), the grid of the field-effect tube (Q1)
It is grounded by first resistor (R1), the drain electrode of the field-effect tube (Q1) is grounded by adjustable resistance (RP1), the field-effect tube
(Q1) source electrode passes through the second electricity by second resistance (R2) external 5V DC voltage power supply, the source electrode of the field-effect tube (Q1)
Hold (C2) to connect with the base stage of the first triode (Q2), the source electrode of the field-effect tube (Q1) passes through the second capacitor (C2) and third
The source electrode of the external 5V DC voltage power supply of series circuit of resistance (R3) composition, the field-effect tube (Q1) passes through the second capacitor
(C2) and the series circuit ground connection of the 4th resistance (R4) composition, the emitter of first triode (Q2) pass through the 6th resistance
(R6) and the parallel circuit ground connection of third capacitor (C3) composition, the collector of first triode (Q2) pass through the 5th resistance
(R5) collector of external 5V DC voltage power supply, first triode (Q2) passes through the 7th resistance (R7) and the 5th capacitor
(C5) series circuit formed is connect with the adjustable end of adjustable resistance (RP1), the collector of first triode (Q2) and the
Four capacitors (C4) connection.
2. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the pressure passes
Sensor (2) is two-wire system pressure sensor.
3. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the ultrasonic wave
Battery is equipped in detector (3), the battery is trifluoro lithium battery.
4. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the high definition is taken the photograph
As head (4) are wide-angle high-definition camera.
5. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the host
It (13) is PLC.
6. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the temperature passes
Sensor (9) is contact type temperature sensor.
7. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the humidity passes
Sensor (10) is resistance-type lithium chloride hygrometer.
8. the road vehicles based on Internet of Things travel monitoring system as described in claim 1, which is characterized in that the host
(13) working power module is equipped in, the working power module includes working power circuit, and the working power circuit includes
Integrated circuit (U1), first diode (D1), the second diode (D2), the second triode (Q3), the 8th resistance (R8), the 9th electricity
Hinder (R9), the 6th capacitor (C6) and the 7th capacitor (C7), the model 7800 of the integrated circuit (U1), the integrated circuit
(U1) input terminal is grounded by the 6th capacitor (C6), the input terminal of the integrated circuit (U1) and the yin of first diode (D1)
Pole connection, the output end of the integrated circuit (U1) are connect with the anode of first diode (D1), the integrated circuit (U1)
The series circuit ground connection that output end is made up of the 8th resistance (R8) and the 9th resistance (R9), the collection of second triode (Q3)
Electrode ground connection, the base stage of second triode (Q3) connect with the 8th resistance (R8) and the 9th resistance (R9) respectively, and described the
The emitter of two triodes (Q3) is connect with the adjustable end of integrated circuit (U1), the output end and second of the integrated circuit (U1)
The cathode of diode (D2) connects, the anode of second diode (D2) respectively with the 8th resistance (R8) and the 9th resistance (R9)
The output end of connection, the integrated circuit (U1) is grounded by the 7th capacitor (C7).
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| CN106657324A (en) * | 2016-12-17 | 2017-05-10 | 深圳市索菱实业股份有限公司 | Vehicle network cloud communication system |
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