CN115931666A - Road dust accumulation load monitoring method and system - Google Patents
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Abstract
The invention relates to the technical field of environmental monitoring, and provides a road dust load monitoring method and a system, wherein the road dust load monitoring method comprises the steps of carrying a road dust load monitoring device and an image acquisition device on a vehicle; the vehicle monitors road dust load in real time according to a set monitoring point, records a vehicle cruising track and generates a walking chart; the management platform automatically carries out data sorting and analysis according to the monitoring data, generates color marking display on the road corresponding to the navigation chart according to the color corresponding to the set concentration standard value, the road section displaying the color is the actual sampling road section, and the concentration of the road dust accumulation load value corresponds to the corresponding color so as to distinguish the dust accumulation load values with different concentration gradients. Through the technical scheme, the problems that the traditional road dust load monitoring workload is relatively complex and the period is long in the related technology are solved.
Description
Technical Field
The invention relates to the technical field of environmental monitoring, in particular to a road dust load monitoring method and a road dust load monitoring system.
Background
Road dust raising refers to raising and mixing the accumulated dust on the road once or several times under certain power conditions (such as wind power, motor vehicle rolling or crowd activities) and then entering the air to form particles with certain particle size distribution. The road dust load monitoring is not used for monitoring the dust on the roadside but used for monitoring the road dust on the passing part of the vehicle, and is an important index for measuring the emission of road dust. The traditional road dust load monitoring method is mainly used for monitoring the road dust load manually, and the traditional manual monitoring needs to perform sampling and point distribution, carry sampling equipment and the like. The influence of factors such as time, space and weather is large, the workload is relatively complex, and a data report is provided after each analysis work is finished, so that the period is long.
Disclosure of Invention
The invention provides a road dust accumulation load monitoring method and a road dust accumulation load monitoring system, which solve the problems of relatively complex workload and long period of the traditional road dust accumulation load monitoring in the related technology.
The technical scheme of the invention is as follows:
in a first aspect, a method of monitoring road dust load comprises
Carrying a road dust load monitoring device and an image acquisition device on a vehicle;
the road dust load monitoring device is used for monitoring suspensible particles raised by vehicle running acting force, and the image acquisition device is used for monitoring real-time vehicle flow and uploading monitoring data to the management platform;
the vehicle monitors road dust load in real time according to a set monitoring point, records a vehicle cruising track and generates a walking chart;
the management platform automatically carries out data sorting and analysis according to the monitoring data, generates color marking display on the road corresponding to the navigation chart according to the color corresponding to the set concentration standard value, the road section displaying the color is an actual sampling road section, and the concentration of the road dust accumulation load value corresponds to the corresponding color so as to distinguish the dust accumulation load values with different concentration gradients.
Further, the road dust load monitoring device monitors suspensible particulate matters raised beside the tire and suspensible particulate matters on the roof respectively.
Further, the real-time monitoring of the road dust load by the vehicle according to the set monitoring point specifically comprises:
taking 1/4-1/3 of the total length of the main road and the express road as sampling points, taking 1/10-1/4 of the total length of the secondary road and the branch road as sampling points, wherein each road should be sampled every 3km, and if the road section is not 3km long, the whole road section needs to be sampled and monitored.
In a second aspect, the road dust load monitoring system comprises a road dust load monitoring unit, the road dust load monitoring unit comprises a laser transmitting circuit and a laser receiving circuit, the laser transmitting circuit comprises a capacitor C1, a resistor R2, an operational amplifier U1, a resistor R4, a resistor R5, a rheostat RP1, a voltage stabilizer U2, an operational amplifier U3, a resistor R7, a triode Q1, a resistor R8, an inductor L1 and a laser emitter LD1,
the first end of the capacitor C1 is connected with a main control unit, the main control unit is in communication connection with a management platform, the second end of the capacitor C1 is connected with the reverse-phase input end of the operational amplifier U3 through the resistor R2, the in-phase input end of the operational amplifier U3 is connected with the first end of the rheostat RP1, the second end of the rheostat RP1 is grounded, the in-phase input end of the operational amplifier U3 is connected with the first end of the resistor R4 through the resistor R5, the second end of the resistor R4 is connected with a VCC power supply, the cathode of the voltage stabilizer U2 is connected with the first end of the resistor R4, the anode of the voltage stabilizer U2 is grounded, the control end of the voltage stabilizer U2 is connected with the cathode of the voltage stabilizer U2, the output end of the operational amplifier U3 is connected with the reverse-phase input end of the operational amplifier U3 through the resistor R6, the output end of the operational amplifier U3 is connected with the base of the triode Q1 through the resistor R7, the emitter of the triode Q1 is grounded through the resistor R8, the collector of the triode Q1 is connected with the anode of the laser emitter LD1 through the inductor L1, and the cathode of the laser emitter LD1 is connected with the laser emitter,
the emitting electrode of the triode Q1 is connected with the non-inverting input end of the operational amplifier U1 through the resistor R1, the output end of the operational amplifier U1 is connected with the inverting input end of the operational amplifier U1, and the output end of the operational amplifier U1 is connected with the inverting input end of the operational amplifier U3.
Further, U5, resistance R9 and resistance R10 are put to laser receiver U4, fortune, U5's homophase input end is connected to fortune, laser receiver LD 2's negative pole is received to the positive pole ground connection of U4, U5's inverting input end ground connection is put to fortune, U5's output is put to fortune is passed through resistance R9 connects U5's homophase input end is put to fortune, U5's output is put to fortune is connected resistance R10's first end, resistance R10's second end is connected the main control unit.
Further, the laser receiving circuit further comprises a resistor R11, a resistor R14, an operational amplifier U6, a resistor R12, a rheostat RP2, a resistor R13, a resistor R15 and an operational amplifier U7, wherein an inverting input end of the operational amplifier U6 is connected with a second end of the resistor R10 through the resistor R11, a non-inverting input end of the operational amplifier U6 is connected with a sliding end of the rheostat RP2, a first end of the rheostat RP2 is connected with Vref reference voltage through the resistor R12, a second end of the rheostat RP2 is grounded through the resistor R13, an output end of the operational amplifier U6 is connected with an inverting input end of the operational amplifier U6 through the resistor R14, an output end of the operational amplifier U6 is connected with the non-inverting input end of the operational amplifier U7 through the resistor R15, the inverting input end of the operational amplifier U7 is grounded, an output end of the operational amplifier U7 is connected with the non-inverting input end of the operational amplifier U7, and an output end of the operational amplifier U7 is connected with the master control unit.
Further, laser receiving circuit still includes resistance R16, electric capacity C8, resistance R17, electric capacity C9, fortune and puts U8, resistance R18 and resistance R19, resistance R16's first end is connected U7's output is put to fortune, resistance R16's second end is passed through resistance R17 connects U8's inphase input end is put to fortune, U8's inphase input end is put to fortune passes through electric capacity C9 ground connection, U8's inverting input end is put to fortune passes through resistance R19 ground connection, U8's output is put to fortune passes through resistance R18 and connects U8's inverting input end is put to fortune, U8's output is put to fortune is connected the main control unit.
The working principle and the beneficial effects of the invention are as follows:
1. the invention firstly provides a road dust load monitoring method, which is used for rapid navigation monitoring of vehicle-mounted urban road dust load. The vehicle monitors road dust load in real time according to a set monitoring point, transmits collected dust data and image data to a management platform, calculates road dust situation through a big data algorithm, calculates traffic dust emission factors of the road according to vehicle speed and vehicle weight, carries out potential dust emission statistics on each road section in a city, arranges the data into a report through the calculation of the management platform, and can support services such as export and the like. The management platform can also check historical data of all monitored roads. The problem of traditional road laying dust load monitoring work load complicated relatively, the cycle is longer is solved, provide convenient for environmental control.
2. The invention also provides a road dust load monitoring system, wherein the laser transmitting circuit is used for transmitting laser signals, the laser signals are scattered after being scattered by the suspendable particles after being transmitted, the laser receiving circuit is used for receiving the laser signals scattered after being scattered by the suspendable particles, converting the laser signals into electric signals and sending the electric signals to the main control unit, and then sending the electric signals to the management platform by the main control unit.
Specifically, the working principle of the laser emitting circuit is as follows: during monitoring, the main control unit outputs a PWM pulse signal, and the PWM pulse signal is coupled by a capacitor C1 and a resistor R2 and then is transmitted to the inverting input end of the operational amplifier U3. The voltage at two ends of the rheostat RP1 is taken as stable reference voltage and is added to the non-inverting input end of the operational amplifier U3, and the reference voltage of the operational amplifier U3 can be adjusted by adjusting the resistance value of the rheostat RP 1. The operational amplifier U3 forms a differential amplification circuit, the operational amplifier U3 outputs a constant electric signal to drive the triode Q1, the triode Q is switched on when the triode Q is in a high level, the triode Q1 is switched off when the triode Q1 is in a low level, the VCC power supply charges the capacitor C4 when the triode Q1 is switched on, and the laser transmitter LD1 does not emit light; when the triode Q1 is cut off, the capacitor C4 discharges, a discharge current flows through the laser emitter LD1, and the laser emitter LD1 emits a laser signal.
In the invention, an operational amplifier U1 takes the emitter voltage of a triode Q1 to form a current negative feedback circuit, a feedback signal is added to the inverting input end of an operational amplifier U3 to adjust the output current in the opposite direction, so as to achieve the purpose of outputting a constant current, a laser emitter LD1 is used as a load and is connected in series with the collector of the triode Q1, and the current of the laser emitter LD1 is controlled by controlling the base of the triode Q1.
Compared with a conventional laser emitting circuit, the laser emitter LD1 has the advantage of constant current operation, so that the current flowing through the laser emitter LD1 is prevented from changing along with the change of the environment, and the laser emitter LD1 is ensured to stably emit laser signals.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a flow chart of a road dust load monitoring method according to the present invention;
FIG. 2 is a circuit diagram of a laser emitting circuit according to the present invention;
FIG. 3 is a circuit diagram of a laser receiver circuit according to the present invention;
FIG. 4 is a circuit diagram of a second amplifier circuit of the present invention;
fig. 5 is a circuit diagram of a filter circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
Example 1
As shown in FIG. 1, the present embodiment provides a method for monitoring road dust load, which includes
S1: a road dust load monitoring device and an image acquisition device are mounted on a vehicle.
The road dust load monitoring device is used for monitoring suspensible particles raised by vehicle running acting force, the monitoring devices are respectively installed at the rear wheel position and the roof position of a chassis of a vehicle, the monitoring device installed at the rear wheel position of the chassis of the vehicle is used for monitoring road dust data excited in the running process of the vehicle, and the monitoring device installed at the roof position is used for monitoring dust data contained in air. The image acquisition device is used for monitoring real-time traffic flow and acquiring image data of road surface dry and wet conditions, road driving vehicle types and the like. And transmitting the collected dust emission data and the image data to a management platform, calculating the road dust accumulation condition through a big data algorithm, calculating a traffic dust emission factor of the road according to the vehicle speed and the vehicle weight, and performing potential dust emission statistics on each road section in the city.
S2: and the vehicle monitors the road dust load in real time according to the set monitoring point, records the vehicle cruising track and generates a walking chart.
In the embodiment, when the dust load of the urban road is monitored in real time, the road is sampled in a segmented manner, 1/4-1/3 of the total length of the type of road is taken as a sampling point for the urban main road and the urban expressway, 1/10-1/4 of the total length of the type of road is taken as a sampling point for the secondary main road and the branch road, each road is sampled every 3km, and if the road section is not 3km long, the whole road section is required to be sampled and monitored. And in the monitoring process, recording the cruising track of the vehicle in real time, and generating a walking chart for the cruising track after the monitoring is finished.
S3: and the management platform automatically performs data sorting and analysis according to the monitoring data, generates color marks on roads corresponding to the navigation chart according to colors corresponding to the set concentration standard values and displays the colors, the road sections displaying the colors are actual sampling road sections, and the concentrations of the road dust accumulation load values correspond to corresponding colors so as to distinguish the dust accumulation load values with different concentration gradients.
The management platform automatically carries out data arrangement and analysis according to the monitoring data, can inquire the cruising track of monitoring position and vehicle, monitors the data at any time, can directly judge the raise dust condition of this highway section according to the color mark on the chart of navigating to calculate through the management platform and arrange the data into the report, can support services such as derivation. The management platform can also check historical data of all monitored roads.
This embodiment has solved traditional road laying dust load monitoring work load tedious relatively through the quick monitoring of navigating of vehicular urban road laying dust load, and the longer problem of cycle provides convenient for environmental management.
Example 2
As shown in fig. 2, based on the same concept as that of embodiment 1, this embodiment further provides a road dust load monitoring system, which includes a road dust load monitoring unit, the road dust load monitoring unit includes a laser transmitting circuit and a laser receiving circuit, the laser transmitting circuit includes a capacitor C1, a resistor R2, an operational amplifier U1, a resistor R4, a resistor R5, a rheostat RP1, a voltage stabilizer U2, an operational amplifier U3, a resistor R7, a triode Q1, a resistor R8, an inductor L1 and a laser transmitter LD1, a first end of the capacitor C1 is connected to a main control unit, the main control unit is connected to a management platform in communication, a second end of the capacitor C1 is connected to an inverting input end of the operational amplifier U3 through the resistor R2, a non-inverting input end of the operational amplifier U3 is connected to a first end of the rheostat 1, a second end of the rheostat RP1 is grounded, U3's homophase input end is put to fortune passes through resistance R5 connecting resistance R4's first end, resistance R4's second end connection VCC power, stabiliser U2's negative pole connecting resistance R4's first end, stabiliser U2's positive pole ground connection, stabiliser U2's control end connection stabiliser U2's negative pole, U3's inverting input end is put to fortune output through resistance R6 connection fortune, U3's base is put to fortune output through resistance R7 connection triode Q1, triode Q1's projecting pole passes through resistance R8 ground connection, triode Q1's collecting electrode passes through inductance L1 and connects laser emitter LD 1's negative pole, laser emitter LD 1's positive pole connection VCC power, triode Q1's projecting pole passes through resistance R1 and connects fortune and puts U1's homophase input end, U1's inverting input end is put to fortune output connection fortune, U1's output connection fortune is put U3's inverting input end.
In the embodiment, the laser dust sensor is used for monitoring suspensible particulate matters (PM 2.5 and PM 10) on a road, and the laser dust sensor is used for monitoring the suspensible particulate matters with the particle size of 0.3-10 mu m in the atmosphere. The basic principle is that after laser is scattered by suspensible particles, the scattered laser signal is received again and converted into an electric pulse signal to be output, the pulse signal output by the laser dust sensor is sent to a main control unit to be processed, and the processed electric signal is sent to a management platform. The higher the concentration of suspendable particles, the weaker the electrical signal received by the main control unit and vice versa. The laser dust sensor comprises a laser transmitter LD1 and a laser receiving tube LD2, a laser transmitting circuit is used for controlling the laser transmitter LD1 to transmit laser signals, and the laser receiving tube LD2 is used for receiving the laser signals and converting the laser signals into electric signals through the laser receiving circuit to be transmitted to the main control unit.
Specifically, the working principle of the laser emitting circuit is as follows: during monitoring, the main control unit outputs a PWM pulse signal, and the PWM pulse signal is coupled by a capacitor C1 and a resistor R2 and then is transmitted to the inverting input end of the operational amplifier U3. The resistor R4, the resistor R5, the rheostat RP1 and the voltage stabilizer U2 form a constant voltage source, the voltage at two ends of the rheostat RP1 is taken as stable reference voltage to be added to the in-phase input end of the operational amplifier U3, and the reference voltage of the operational amplifier U3 can be adjusted by adjusting the resistance value of the rheostat RP 1. The operational amplifier U3 forms a differential amplification circuit, the operational amplifier U3 outputs a constant electric signal to drive the triode Q1, the triode Q is switched on when the triode Q is in a high level, the triode Q1 is switched off when the triode Q1 is in a low level, the VCC power supply charges the capacitor C4 when the triode Q1 is switched on, and the laser transmitter LD1 does not emit light; when the triode Q1 is cut off, the capacitor C4 discharges, a discharge current flows through the laser emitter LD1, and the laser emitter LD1 emits a laser signal.
The triode Q1 is conducted, the emitter voltage of the triode Q1 is taken and is added to the in-phase input end of the operational amplifier U1 after passing through the resistor R1, the operational amplifier U1 is a follower, and the output of the operational amplifier U1 is transmitted to the inverting input end of the operational amplifier U3 to form a current negative feedback circuit, so that the output current is adjusted in the opposite direction, the purpose of outputting constant current is achieved, and the laser emitter LD1 is ensured to stably emit laser signals. The laser emitter LD1 is used as a load and is connected in series with the collector of the triode Q1, and the current of the laser emitter LD1 is controlled by controlling the base of the triode Q1.
Further, as shown in fig. 3, the laser receiving circuit includes a laser receiver U4, an operational amplifier U5, a resistor R9 and a resistor R10, a non-inverting input terminal of the operational amplifier U5 is connected to a cathode of the laser receiving tube LD2, an anode of the laser receiving tube LD2 is grounded, an inverting input terminal of the operational amplifier U5 is grounded, an output terminal of the operational amplifier U5 is connected to the non-inverting input terminal of the operational amplifier U5 through the resistor R9, an output terminal of the operational amplifier U5 is connected to a first end of the resistor R10, and a second end of the resistor R10 is connected to the main control unit.
The laser receiving tube LD2 is used for receiving the laser signal scattered by the suspensible particulate matter and converting the laser signal into an electric signal to be added to the non-inverting input end of the operational amplifier U5, the operational amplifier U5 forms an amplifying circuit, the electric signal generated by the laser receiving tube LD2 is weak, so that the electric signal needs to be amplified, and the amplified signal is sent to the main control unit. The resistor R10 and the capacitor C6 form a low-pass filter, and the low-pass filter is used for filtering the electric signal output by the operational amplifier U5.
Further, as shown in fig. 4, the laser receiving circuit further includes a resistor R11, a resistor R14, an operational amplifier U6, a resistor R12, a rheostat RP2, a resistor R13, a resistor R15, and an operational amplifier U7, an inverting input terminal of the operational amplifier U6 is connected to a second terminal of the resistor R10 through the resistor R11, a non-inverting input terminal of the operational amplifier U6 is connected to a sliding terminal of the rheostat RP2, a first terminal of the rheostat RP2 is connected to a Vref reference voltage through the resistor R12, a second terminal of the rheostat RP2 is grounded through the resistor R13, an output terminal of the operational amplifier U6 is connected to an inverting input terminal of the operational amplifier U6 through the resistor R14, an output terminal of the operational amplifier U6 is connected to a non-inverting input terminal of the operational amplifier U7 through the resistor R15, a non-inverting input terminal of the operational amplifier U7 is grounded, an output terminal of the operational amplifier U7 is connected to a non-inverting input terminal of the operational amplifier U7, and an output terminal of the operational amplifier U7 is connected to the main control unit.
Because the electrical signal generated by the laser receiving tube LD2 is weak, the signal amplified by the first-stage amplifying circuit will introduce noise interference generated by a large number of components, so in order to reduce the noise interference, the embodiment adopts the two-stage amplifying circuit to amplify the signal, wherein the resistor R11, the resistor R14, the operational amplifier U6, the resistor R12, the rheostat RP2 and the resistor R13 form the second-stage amplifying circuit, and the amplifying circuit is a differential amplifying circuit and is used for improving the common mode rejection ratio of the electrical signal in the transmission process and improving the anti-interference capability of the circuit. The operational amplifier U7 forms a follower, plays a role in signal isolation, and finally sends the amplified electric signal to the main control unit.
Further, as shown in fig. 5, the laser receiving circuit further includes a resistor R16, a capacitor C8, a resistor R17, a capacitor C9, an operational amplifier U8, a resistor R18 and a resistor R19, the first end of the resistor R16 is connected to the output end of the operational amplifier U7, the second end of the resistor R16 is connected to the non-inverting input end of the operational amplifier U8 through the resistor R17, the non-inverting input end of the operational amplifier U8 is grounded through the capacitor C9, the inverting input end of the operational amplifier U8 is grounded through the resistor R19, the output end of the operational amplifier U8 is connected to the inverting input end of the operational amplifier U8 through the resistor R18, and the output end of the operational amplifier U8 is connected to the main control unit.
In this embodiment, laser receiver tube LD2 can introduce interference signal at the in-process of receiving through the particulate matter scattering laser signal that can suspend, if do not filter these interference signal, can influence the precision of the particulate matter concentration monitoring that can suspend on the road, so the filter circuit has been added in this embodiment, resistance R16, electric capacity C8, resistance R17, electric capacity C9, fortune are put U8, resistance R18 and resistance R19 and have constituted second order low pass filter circuit for the high frequency clutter in the filtering signal, thereby improve the precision that can suspend particulate matter concentration monitoring. And finally, sending the filtered electric signal to a main control unit.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The method for monitoring the road dust load is characterized by comprising the following steps
Carrying a road dust load monitoring device and an image acquisition device on a vehicle;
the road dust load monitoring device is used for monitoring suspensible particles raised by vehicle running acting force, and the image acquisition device is used for monitoring real-time vehicle flow and uploading monitoring data to the management platform;
the vehicle monitors road dust load in real time according to a set monitoring point, records a vehicle cruising track and generates a walking chart;
and the management platform automatically performs data sorting and analysis according to the monitoring data, generates color marks on roads corresponding to the navigation chart according to colors corresponding to the set concentration standard values and displays the colors, the road sections displaying the colors are actual sampling road sections, and the concentrations of the road dust accumulation load values correspond to corresponding colors so as to distinguish the dust accumulation load values with different concentration gradients.
2. The road dust load monitoring method according to claim 1, wherein the road dust load monitoring device monitors suspendable particulate matter raised beside tires and suspendable particulate matter on a roof of a vehicle, respectively.
3. The method for monitoring road dust load according to claim 1, wherein the real-time monitoring of the road dust load by the vehicle according to the set monitoring point specifically comprises:
taking 1/4-1/3 of the total length of the main road and the express road as sampling points, taking 1/10-1/4 of the total length of the secondary road and the branch road as sampling points, sampling every 3km of each road, and if the road section is not 3km long, sampling and monitoring the whole road section.
4. The road dust accumulation load monitoring system is characterized by comprising a road dust accumulation load monitoring unit, wherein the road dust accumulation load monitoring unit comprises a laser transmitting circuit and a laser receiving circuit, the laser transmitting circuit comprises a capacitor C1, a resistor R2, an operational amplifier U1, a resistor R4, a resistor R5, a rheostat RP1, a voltage stabilizer U2, an operational amplifier U3, a resistor R7, a triode Q1, a resistor R8, an inductor L1 and a laser transmitter LD1,
the first end of the capacitor C1 is connected with a main control unit, the main control unit is in communication connection with a management platform, the second end of the capacitor C1 is connected with the reverse-phase input end of the operational amplifier U3 through the resistor R2, the in-phase input end of the operational amplifier U3 is connected with the first end of the rheostat RP1, the second end of the rheostat RP1 is grounded, the in-phase input end of the operational amplifier U3 is connected with the first end of the resistor R4 through the resistor R5, the second end of the resistor R4 is connected with a VCC power supply, the cathode of the voltage stabilizer U2 is connected with the first end of the resistor R4, the anode of the voltage stabilizer U2 is grounded, the control end of the voltage stabilizer U2 is connected with the cathode of the voltage stabilizer U2, the output end of the operational amplifier U3 is connected with the reverse-phase input end of the operational amplifier U3 through the resistor R6, the output end of the operational amplifier U3 is connected with the base of the triode Q1 through the resistor R7, the emitter of the triode Q1 is grounded through the resistor R8, the collector of the triode Q1 is connected with the anode of the laser emitter LD1 through the inductor L1, and the cathode of the laser emitter LD1 is connected with the laser emitter,
the emitting electrode of the triode Q1 is connected with the non-inverting input end of the operational amplifier U1 through the resistor R1, the output end of the operational amplifier U1 is connected with the inverting input end of the operational amplifier U1, and the output end of the operational amplifier U1 is connected with the inverting input end of the operational amplifier U3.
5. The road dust accumulation load monitoring system as claimed in claim 4, wherein the laser receiving circuit comprises a laser receiver U4, an operational amplifier U5, a resistor R9 and a resistor R10, the non-inverting input terminal of the operational amplifier U5 is connected to the cathode of the laser receiving tube LD2, the anode of the laser receiving tube U4 is grounded, the inverting input terminal of the operational amplifier U5 is grounded, the output terminal of the operational amplifier U5 is connected to the non-inverting input terminal of the operational amplifier U5 through the resistor R9, the output terminal of the operational amplifier U5 is connected to the first terminal of the resistor R10, and the second terminal of the resistor R10 is connected to the main control unit.
6. The road dust accumulation load monitoring system as claimed in claim 5, wherein the laser receiving circuit further comprises a resistor R11, a resistor R14, an operational amplifier U6, a resistor R12, a rheostat RP2, a resistor R13, a resistor R15, and an operational amplifier U7, wherein an inverting input terminal of the operational amplifier U6 is connected to the second terminal of the resistor R10 through the resistor R11, a non-inverting input terminal of the operational amplifier U6 is connected to a sliding terminal of the rheostat RP2, a first terminal of the rheostat RP2 is connected to a Vref reference voltage through the resistor R12, a second terminal of the rheostat RP2 is grounded through the resistor R13, an output terminal of the operational amplifier U6 is connected to an inverting input terminal of the operational amplifier U6 through the resistor R14, an output terminal of the operational amplifier U6 is connected to a non-inverting input terminal of the operational amplifier U7 through the resistor R15, an inverting input terminal of the operational amplifier U7 is grounded, an output terminal of the operational amplifier U7 is connected to a non-inverting input terminal of the operational amplifier U7, and an output terminal of the operational amplifier U7 is connected to the main control unit.
7. The road dust accumulation load monitoring system according to claim 6, wherein the laser receiving circuit further comprises a resistor R16, a capacitor C8, a resistor R17, a capacitor C9, an operational amplifier U8, a resistor R18 and a resistor R19, the first end of the resistor R16 is connected with the output end of the operational amplifier U7, the second end of the resistor R16 is connected with the non-inverting input end of the operational amplifier U8 through the resistor R17, the non-inverting input end of the operational amplifier U8 is grounded through the capacitor C9, the inverting input end of the operational amplifier U8 is grounded through the resistor R19, the output end of the operational amplifier U8 is connected with the inverting input end of the operational amplifier U8 through the resistor R18, and the output end of the operational amplifier U8 is connected with the main control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310033947.1A CN115931666A (en) | 2023-01-10 | 2023-01-10 | Road dust accumulation load monitoring method and system |
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| CN202310033947.1A CN115931666A (en) | 2023-01-10 | 2023-01-10 | Road dust accumulation load monitoring method and system |
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| CN110991930A (en) * | 2019-12-18 | 2020-04-10 | 天津玺腾龙科技发展有限公司 | Method for calculating dust load grade of road section |
| KR20210050831A (en) * | 2019-10-29 | 2021-05-10 | 주식회사 인포쉐어 | Real-time fine dust monitoring system and its methods |
| CN113514373A (en) * | 2021-06-29 | 2021-10-19 | 中国环境科学研究院 | System and method for evaluating road cleanliness |
| CN214894715U (en) * | 2021-05-06 | 2021-11-26 | 天津智易时代科技发展有限公司 | Vehicle-mounted urban road dust load rapid navigation monitoring system |
| CN215065981U (en) * | 2021-02-26 | 2021-12-07 | 深圳和而泰小家电智能科技有限公司 | Infrared dust detection circuit and dust collector |
| CN114264584A (en) * | 2021-12-27 | 2022-04-01 | 河北华清环境科技集团股份有限公司 | Vehicle-mounted mobile monitoring system and monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210050831A (en) * | 2019-10-29 | 2021-05-10 | 주식회사 인포쉐어 | Real-time fine dust monitoring system and its methods |
| CN110991930A (en) * | 2019-12-18 | 2020-04-10 | 天津玺腾龙科技发展有限公司 | Method for calculating dust load grade of road section |
| CN215065981U (en) * | 2021-02-26 | 2021-12-07 | 深圳和而泰小家电智能科技有限公司 | Infrared dust detection circuit and dust collector |
| CN214894715U (en) * | 2021-05-06 | 2021-11-26 | 天津智易时代科技发展有限公司 | Vehicle-mounted urban road dust load rapid navigation monitoring system |
| CN113514373A (en) * | 2021-06-29 | 2021-10-19 | 中国环境科学研究院 | System and method for evaluating road cleanliness |
| CN114264584A (en) * | 2021-12-27 | 2022-04-01 | 河北华清环境科技集团股份有限公司 | Vehicle-mounted mobile monitoring system and monitoring method |
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