CN209767530U - Power line carrier area lighting equipment condition monitoring system - Google Patents
Power line carrier area lighting equipment condition monitoring system Download PDFInfo
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- CN209767530U CN209767530U CN201920658005.1U CN201920658005U CN209767530U CN 209767530 U CN209767530 U CN 209767530U CN 201920658005 U CN201920658005 U CN 201920658005U CN 209767530 U CN209767530 U CN 209767530U
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Abstract
The utility model provides a regional lighting apparatus situation monitoring system of power line carrier, its characterized in that: the system comprises a master controller and a slave controller; the main controller comprises a main control single chip microcomputer, a power carrier module I and a communication module; the slave controller comprises a slave control single chip microcomputer, a power carrier module II, a signal acquisition module and a power supply; the signal acquisition module is connected with the lighting equipment; the master control single chip microcomputer is in signal connection with the power carrier module I and the communication module respectively; the slave control single chip microcomputer is in signal connection with the power carrier module II; the first power carrier module is connected with the second power carrier module through a power line; the communication module is also in signal connection with the cloud platform. The monitoring system can realize the monitoring of the working condition of the lighting equipment, so that the working personnel can judge whether the lighting equipment breaks down and quickly position the position of a broken lamp, the communication is reliable and convenient, and the communication cost is saved.
Description
Technical Field
the utility model relates to a lighting monitoring technology field, more specifically say, relate to a regional illumination situation monitoring system of power line carrier.
Background
with the development of the internet era, people's lives become increasingly beautiful, but there is room for technical improvement in lighting technology. For example, in large scenic spots, campuses, remote roads and other occasions, if the lighting condition of the street lamp is observed in a manual patrol mode, a large amount of manpower and material resources are consumed, when the street lamp is in a problem, the street lamp is often difficult to find and position in time and make corresponding maintenance measures, lighting brightness and lighting effect are affected, and safety accidents such as lamp explosion, short circuit and the like are caused by street lamp faults, so that potential safety hazards exist. Therefore, it is necessary to design a system for automatically monitoring the condition of the lighting device to monitor whether the lighting device is out of order and to find and locate the position of the broken lamp in time, so that the broken lamp can be quickly repaired or replaced.
At present, control systems based on WiFi and Zigbee communication are commonly used in the field of lighting systems, but although WiFi and Zigbee technologies are mature, they are not suitable for use in remote areas, and therefore, other communication technologies need to be used for monitoring systems.
SUMMERY OF THE UTILITY MODEL
For overcoming the shortcoming and not enough among the prior art, the utility model aims to provide a can realize the monitoring of lighting apparatus working condition to whether the staff judges that lighting apparatus breaks down and fixes a position fast to bad lamp position, be favorable to improving lighting apparatus and use reliability and security, the reliable convenient, the regional lighting apparatus condition monitoring system of power line carrier wave who saves communication cost of communication.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a power line carrier regional lighting device condition monitoring system characterized in that: the system comprises a master controller, a slave controller, a cloud platform and cloud platform application equipment; the main controller comprises a main control single chip microcomputer, a power carrier module I and a communication module; the slave controller comprises a slave control single chip microcomputer, a power carrier module II, a signal acquisition module and a power supply for supplying power; the signal acquisition module is connected with the lighting equipment to realize the acquisition of lighting working data; the master control single chip microcomputer is in signal connection with the power line carrier module I and the communication module respectively; the slave control single chip microcomputer is in signal connection with the power carrier module II; the first power carrier module is connected with the second power carrier module through a power line; the communication module is also in signal connection with the cloud platform; and the cloud platform is in signal connection with the cloud platform application equipment.
The utility model discloses monitoring system's theory of operation is: firstly, the cloud platform sends an execution instruction to a main controller;
Then, in the main controller, the main control single chip microcomputer receives the execution instruction and then generates an execution signal, and the execution signal is modulated into a high-frequency execution signal through the power line carrier module I and loaded into a power line;
In the slave controller, the power carrier module II receives a high-frequency execution signal from the power line, demodulates the high-frequency execution signal into an execution signal and sends the execution signal to the slave control single chip microcomputer; after receiving the execution signal from the slave control single chip microcomputer, acquiring an illumination working data signal by reading a signal acquisition module; modulating the lighting working data signal into a high-frequency lighting working data signal through a power carrier module II and loading the high-frequency lighting working data signal into a power line;
The power line carrier module I receives a high-frequency lighting working data signal from a power line, demodulates the high-frequency lighting working data signal into a lighting working data signal and sends the lighting working data signal to the master control single chip microcomputer to obtain lighting working data;
then, the main controller uploads the lighting working data to the cloud platform, and the cloud platform judges the condition of the lighting equipment according to the lighting working data; or the master control singlechip judges the state of the lighting equipment according to the lighting working data and uploads the lighting working data to the cloud platform.
The utility model discloses monitoring system can gather illumination working data and carry out the conveying, realizes lighting apparatus working condition monitoring to whether the staff judges that lighting apparatus breaks down and realizes fixing a position fast to the position that damages lighting apparatus, be convenient for in time maintain or change, eliminate the potential safety hazard, be favorable to improving reliability and the security that lighting apparatus used. The utility model discloses monitoring system adopts power line carrier mode to communicate, can overcome the situation that the remote area does not have the network, utilizes original power line to carry out signal transmission, and is reliable, convenient, saves the communication cost.
preferably, the first power carrier module comprises a first carrier chip with a model number of KQ-130, a first amplifying circuit, a first transformer and a first filtering circuit; a pin RX of the first carrier chip is connected with the output end of the main control single chip microcomputer, a pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with a primary side of a first transformer, and a secondary side of the first transformer is connected with a power line; the primary side of the transformer I is also connected with a pin IRX and a pin G of the carrier chip I through a filter circuit I; a pin TX of the first carrier chip is connected with the input end of the master control singlechip;
The power carrier module II comprises a carrier chip II with the type KQ-130, an amplifying circuit II, a transformer II and a filter circuit II; a pin RX of the second carrier chip is connected with the output end of the slave control single chip microcomputer, a pin TI of the second carrier chip is connected with a second amplifying circuit, the second amplifying circuit is connected with a primary side of a second transformer, and a secondary side of the second transformer is connected with a power line; the primary side of the transformer II is also connected with a pin IRX and a pin G of the carrier chip II through a filter circuit II; and a pin TX of the second carrier chip is connected with the input end of the slave control singlechip. The first power carrier module and the second power carrier module can realize signal modulation and demodulation, and are favorable for effectively, reliably and safely realizing signal transmission.
preferably, the first amplifying circuit comprises an NPN triode Q7, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R28, a resistor R30, a diode D8, a diode D12 and an inductor L1; the first filter circuit comprises a resistor R26, a resistor R27, a capacitor C15, a capacitor C18, an inductor L2, a diode D9 and a diode D10;
the pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with the primary side of a first transformer, and the secondary side of the first transformer is connected with a power line, and the method comprises the following steps: a pin TI of the first carrier chip is connected with a base electrode of an NPN triode Q7 through a resistor R28 and a capacitor C20 which are connected in series, and the base electrode of the NPN triode Q7 is grounded through a diode D12 and a resistor R30 which are connected in parallel; the emitter of the NPN triode Q7 is grounded; a collector of the NPN triode Q7 is connected with the anode of a power supply through an inductor L1 and a diode D8 which are connected in series, and a capacitor C17 is connected with an inductor L1 in parallel; the collector of the NPN triode Q7 is also connected with the first primary port of the first transformer through a capacitor C19; a primary port II of the transformer I is grounded; a voltage stabilizing diode D11 is connected between the first primary port and the second primary port of the first transformer; a first secondary port of the first transformer is connected with a live wire; a secondary port II of the transformer I is connected with a zero line through an inductor L3 and a capacitor C21 which are connected in series;
The primary side of the first transformer is also connected with a pin IRX and a pin G of the first carrier chip through a first filter circuit, and the first transformer means that: the first primary port of the first transformer is connected with a first pin IRX of the first carrier chip through a resistor R27 and a capacitor C15 which are connected in series, and the first pin IRX of the first carrier chip is connected with a first pin G of the first carrier chip through an inductor L2; the resistor R26, the capacitor C18, the inductor L2, the diode D9 and the diode D10 are respectively connected in parallel to the inductor L2.
preferably, the signal acquisition module comprises a sampling resistor connected with the lighting equipment in series and a metering chip with the model number of RN 8029; two ends of the sampling resistor are respectively connected with a pin V1P and a pin V1N of the metering chip; and a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer. The signal acquisition module can acquire the current value of the sampling resistor through acquiring the resistor of the sampling resistor, so that the effective current value and the effective voltage value of the lighting equipment connected with the sampling resistor in series are obtained.
Preferably, a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer through an optical coupling isolation circuit. The optical coupling isolation circuit can achieve an electrical isolation effect, output signals do not have any influence on input ends, the anti-interference capacity is high, and the work is stable.
Preferably, the power supply comprises a voltage transformation rectifying module and a voltage reduction and stabilization module which are connected with each other; the voltage transformation rectifying module is connected with the mains supply; the voltage reduction and stabilization module is connected with the slave controller.
Preferably, the cloud platform application device comprises a mobile terminal and a computer terminal.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
1. the utility model discloses can gather and carry out the conveying to illumination working data, realize lighting apparatus working condition monitoring to the staff judges whether lighting apparatus breaks down and realizes quick location to the position that damages lighting apparatus, be convenient for in time maintain or change, eliminate the potential safety hazard, be favorable to improving reliability and the security that lighting apparatus used; the power line carrier mode is adopted for communication, the condition that a remote area has no network can be overcome, the original power line is utilized for signal transmission, the reliability and convenience are realized, and the communication cost is saved;
2. In the utility model, the first power carrier module and the second power carrier module can realize signal modulation and demodulation, which is beneficial to effectively, reliably and safely realizing signal transmission;
3. The utility model discloses in, signal acquisition module can effectively reachs lighting apparatus's effective current value and effective voltage value to the staff of being convenient for judges the lighting apparatus situation.
Drawings
Fig. 1 is a system block diagram of the monitoring system of the present invention;
fig. 2 is a schematic circuit diagram of a power line carrier module i in the monitoring system of the present invention;
Fig. 3 is a schematic circuit diagram of a signal acquisition module in the monitoring system of the present invention;
fig. 4 is a schematic circuit diagram of the optical coupling isolation circuit in the monitoring system of the present invention;
fig. 5 is a schematic circuit diagram of a power supply in the monitoring system of the present invention;
Fig. 6 is a schematic diagram of the connection between the oneNET cloud platform and the terminal in the monitoring system of the present invention;
Fig. 7 is a working flow of the monitoring system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 6, a system for monitoring the condition of a lighting device in a power line carrier area according to this embodiment includes a master controller, a slave controller, a cloud platform, and a cloud platform application device; the main controller comprises a main control single chip microcomputer, a power carrier module I and a communication module; the slave controller comprises a slave control single chip microcomputer, a power carrier module II, a signal acquisition module and a power supply for supplying power; the signal acquisition module is connected with the lighting equipment to realize the acquisition of lighting working data; the master control single chip microcomputer is in signal connection with the power carrier module I and the communication module respectively; the slave control single chip microcomputer is in signal connection with the power carrier module II; the first power carrier module is connected with the second power carrier module through a power line; the communication module is also in signal connection with the cloud platform; and the cloud platform is in signal connection with the cloud platform application equipment.
The utility model discloses monitoring system can gather illumination working data and carry out the conveying, realizes lighting apparatus working condition monitoring to whether the staff judges that lighting apparatus breaks down and realizes fixing a position fast to the position that damages lighting apparatus, be convenient for in time maintain or change, eliminate the potential safety hazard, be favorable to improving reliability and the security that lighting apparatus used. The utility model discloses monitoring system adopts power line carrier mode to communicate, can overcome the situation that the remote area does not have the network, utilizes original power line to carry out signal transmission, and is reliable, convenient, saves the communication cost.
the master control singlechip and the slave control singlechip can adopt the existing singlechip, such as an STM32 singlechip.
the first power carrier module comprises a first carrier chip with the model of KQ-130, a first amplifying circuit, a first transformer and a first filter circuit; a pin RX of the first carrier chip is connected with the output end of the main control single chip microcomputer, a pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with a primary side of a first transformer, and a secondary side of the first transformer is connected with a power line; the primary side of the transformer I is also connected with a pin IRX and a pin G of the carrier chip I through a filter circuit I; a pin TX of the first carrier chip is connected with the input end of the master control singlechip;
The power carrier module II comprises a carrier chip II with the type KQ-130, an amplifying circuit II, a transformer II and a filter circuit II; a pin RX of the second carrier chip is connected with the output end of the slave control single chip microcomputer, a pin TI of the second carrier chip is connected with a second amplifying circuit, the second amplifying circuit is connected with a primary side of a second transformer, and a secondary side of the second transformer is connected with a power line; the primary side of the transformer II is also connected with a pin IRX and a pin G of the carrier chip II through a filter circuit II; and a pin TX of the second carrier chip is connected with the input end of the slave control singlechip. The first power carrier module and the second power carrier module can realize signal modulation and demodulation, and are favorable for effectively, reliably and safely realizing signal transmission.
The first amplifying circuit comprises an NPN triode Q7, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R28, a resistor R30, a diode D8, a diode D12 and an inductor L1; the first filter circuit comprises a resistor R26, a resistor R27, a capacitor C15, a capacitor C18, an inductor L2, a diode D9 and a diode D10;
The pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with the primary side of a first transformer, and the secondary side of the first transformer is connected with a power line, and the method comprises the following steps: a pin TI of the first carrier chip is connected with a base electrode of an NPN triode Q7 through a resistor R28 and a capacitor C20 which are connected in series, and the base electrode of the NPN triode Q7 is grounded through a diode D12 and a resistor R30 which are connected in parallel; the emitter of the NPN triode Q7 is grounded; a collector of the NPN triode Q7 is connected with the anode of a power supply through an inductor L1 and a diode D8 which are connected in series, and a capacitor C17 is connected with an inductor L1 in parallel; the collector of the NPN triode Q7 is also connected with the first primary port of the first transformer through a capacitor C19; a primary port II of the transformer I is grounded; a voltage stabilizing diode D11 is connected between the first primary port and the second primary port of the first transformer; a first secondary port of the first transformer is connected with a live wire; a secondary port II of the transformer I is connected with a zero line through an inductor L3 and a capacitor C21 which are connected in series;
The primary side of the first transformer is also connected with a pin IRX and a pin G of the first carrier chip through a first filter circuit, and the first transformer means that: the first primary port of the first transformer is connected with a first pin IRX of the first carrier chip through a resistor R27 and a capacitor C15 which are connected in series, and the first pin IRX of the first carrier chip is connected with a first pin G of the first carrier chip through an inductor L2; the resistor R26, the capacitor C18, the inductor L2, the diode D9 and the diode D10 are respectively connected in parallel to the inductor L2.
The circuit structure of the power carrier module II is the same as that of the power carrier module I.
The signal acquisition module comprises a sampling resistor connected with the lighting equipment in series and a metering chip with the model number of RN 8029; with a resistance R35, the material is manganin, approximately 10 milliohms. Two ends of the sampling resistor are respectively connected with a pin V1P and a pin V1N of the metering chip; and a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer. The signal acquisition module can acquire the current value of the sampling resistor through acquiring the resistor of the sampling resistor, so that the effective current value and the effective voltage value of the lighting equipment connected with the sampling resistor in series are obtained.
and a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer through an optical coupling isolation circuit. The optical coupling isolation circuit can achieve an electrical isolation effect, output signals do not have any influence on input ends, the anti-interference capacity is high, and the work is stable.
the power supply comprises a voltage transformation rectifying module and a voltage reduction and stabilization module which are connected with each other; the voltage transformation rectifying module is connected with the mains supply; the voltage reduction and stabilization module is connected with the slave controller.
The communication module can adopt an existing communication module, such as a WIFI module. The communication between the communication module and the cloud platform can adopt the prior art. The cloud platform application equipment comprises a mobile terminal and a computer terminal; according to the classification of communication protocols, the mobile terminal and the computer terminal can be classified into an EDP SCK terminal, a TCP SCK terminal and an MQTT Client terminal.
the monitoring method of the monitoring system of the utility model is shown in figure 7; the method comprises the following steps:
S1, the cloud platform sends an execution instruction to the main controller;
S2, in the main controller, the main control singlechip receives the execution instruction and then generates an execution signal, and the execution signal is modulated into a high-frequency execution signal through the first power carrier module and loaded into a power line;
S3, in the slave controller, the power carrier module II receives a high-frequency execution signal from the power line, demodulates the high-frequency execution signal into an execution signal and sends the execution signal to the slave control single chip microcomputer; after receiving the execution signal from the slave control single chip microcomputer, acquiring an illumination working data signal by reading a signal acquisition module; modulating the lighting working data signal into a high-frequency lighting working data signal through a power carrier module II and loading the high-frequency lighting working data signal into a power line;
S4, the first power carrier module receives a high-frequency lighting working data signal from the power line, demodulates the high-frequency lighting working data signal into a lighting working data signal and sends the lighting working data signal to the main control single chip microcomputer to obtain lighting working data;
s5, uploading the lighting working data to a cloud platform by the main controller, and judging the condition of the lighting equipment by the cloud platform according to the lighting working data; or the master control singlechip judges the state of the lighting equipment according to the lighting working data and uploads the lighting working data to the cloud platform.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (7)
1. A power line carrier regional lighting device condition monitoring system characterized in that: the system comprises a master controller, a slave controller, a cloud platform and cloud platform application equipment; the main controller comprises a main control single chip microcomputer, a power carrier module I and a communication module; the slave controller comprises a slave control single chip microcomputer, a power carrier module II, a signal acquisition module and a power supply for supplying power; the signal acquisition module is connected with the lighting equipment to realize the acquisition of lighting working data; the master control single chip microcomputer is in signal connection with the power line carrier module I and the communication module respectively; the slave control single chip microcomputer is in signal connection with the power carrier module II; the first power carrier module is connected with the second power carrier module through a power line; the communication module is also in signal connection with the cloud platform; and the cloud platform is in signal connection with the cloud platform application equipment.
2. the power line carrier area lighting device condition monitoring system of claim 1, wherein: the first power carrier module comprises a first carrier chip with the type KQ-130, a first amplifying circuit, a first transformer and a first filter circuit; a pin RX of the first carrier chip is connected with the output end of the main control single chip microcomputer, a pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with a primary side of a first transformer, and a secondary side of the first transformer is connected with a power line; the primary side of the transformer I is also connected with a pin IRX and a pin G of the carrier chip I through a filter circuit I; a pin TX of the first carrier chip is connected with the input end of the master control singlechip;
the power carrier module II comprises a carrier chip II with the type KQ-130, an amplifying circuit II, a transformer II and a filter circuit II; a pin RX of the second carrier chip is connected with the output end of the slave control single chip microcomputer, a pin TI of the second carrier chip is connected with a second amplifying circuit, the second amplifying circuit is connected with a primary side of a second transformer, and a secondary side of the second transformer is connected with a power line; the primary side of the transformer II is also connected with a pin IRX and a pin G of the carrier chip II through a filter circuit II; and a pin TX of the second carrier chip is connected with the input end of the slave control singlechip.
3. the power line carrier area lighting device condition monitoring system of claim 2, wherein: the first amplifying circuit comprises an NPN triode Q7, a capacitor C17, a capacitor C19, a capacitor C20, a resistor R28, a resistor R30, a diode D8, a diode D12 and an inductor L1; the first filter circuit comprises a resistor R26, a resistor R27, a capacitor C15, a capacitor C18, an inductor L2, a diode D9 and a diode D10;
The pin TI of the first carrier chip is connected with a first amplifying circuit, the first amplifying circuit is connected with the primary side of a first transformer, and the secondary side of the first transformer is connected with a power line, and the method comprises the following steps: a pin TI of the first carrier chip is connected with a base electrode of an NPN triode Q7 through a resistor R28 and a capacitor C20 which are connected in series, and the base electrode of the NPN triode Q7 is grounded through a diode D12 and a resistor R30 which are connected in parallel; the emitter of the NPN triode Q7 is grounded; a collector of the NPN triode Q7 is connected with the anode of a power supply through an inductor L1 and a diode D8 which are connected in series, and a capacitor C17 is connected with an inductor L1 in parallel; the collector of the NPN triode Q7 is also connected with the first primary port of the first transformer through a capacitor C19; a primary port II of the transformer I is grounded; a voltage stabilizing diode D11 is connected between the first primary port and the second primary port of the first transformer; a first secondary port of the first transformer is connected with a live wire; a secondary port II of the transformer I is connected with a zero line through an inductor L3 and a capacitor C21 which are connected in series;
The primary side of the first transformer is also connected with a pin IRX and a pin G of the first carrier chip through a first filter circuit, and the first transformer means that: the first primary port of the first transformer is connected with a first pin IRX of the first carrier chip through a resistor R27 and a capacitor C15 which are connected in series, and the first pin IRX of the first carrier chip is connected with a first pin G of the first carrier chip through an inductor L2; the resistor R26, the capacitor C18, the inductor L2, the diode D9 and the diode D10 are respectively connected in parallel to the inductor L2.
4. The power line carrier area lighting device condition monitoring system of claim 1, wherein: the signal acquisition module comprises a sampling resistor connected with the lighting equipment in series and a metering chip with the model number of RN 8029; two ends of the sampling resistor are respectively connected with a pin V1P and a pin V1N of the metering chip; and a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer.
5. The power line carrier area lighting device condition monitoring system of claim 4, wherein: and a pin SDO, a pin SDI, a pin SCSN and a pin SCLK of the metering chip are respectively connected with the slave control single chip microcomputer through an optical coupling isolation circuit.
6. The power line carrier area lighting device condition monitoring system of claim 1, wherein: the power supply comprises a voltage transformation rectifying module and a voltage reduction and stabilization module which are connected with each other; the voltage transformation rectifying module is connected with the mains supply; the voltage reduction and stabilization module is connected with the slave controller.
7. The power line carrier area lighting device condition monitoring system of claim 1, wherein: the cloud platform application device comprises a mobile terminal and a computer terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920658005.1U CN209767530U (en) | 2019-05-09 | 2019-05-09 | Power line carrier area lighting equipment condition monitoring system |
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| CN201920658005.1U CN209767530U (en) | 2019-05-09 | 2019-05-09 | Power line carrier area lighting equipment condition monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138417A (en) * | 2019-05-09 | 2019-08-16 | 佛山科学技术学院 | A kind of power line carrier area illumination device condition monitoring system and monitoring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138417A (en) * | 2019-05-09 | 2019-08-16 | 佛山科学技术学院 | A kind of power line carrier area illumination device condition monitoring system and monitoring method |
| CN110138417B (en) * | 2019-05-09 | 2024-06-14 | 佛山科学技术学院 | Power line carrier area lighting equipment condition monitoring system and monitoring method |
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Granted publication date: 20191210 Termination date: 20210509 |