A remote unattended device, a control method thereof and a remote control system

Abstract

The present application relates to a kind of remote unattended equipment and its control method, remote control system, for solving the current energy consumption of unattended equipment in remote, electronic components are prone to aging and the problem of battery depletion caused by continuous low-power output.The present application includes the manned center station and remote unattended equipment connected, remote unattended equipment also includes remote switch control device, second optical communication module, measuring equipment, power supply and unattended equipment switch;Remote switch control device includes sequentially connected online optical power meter, current-voltage conversion circuit, comparison circuit and relay;Online optical power meter is communicated with manned center station;Online optical power meter is communicated with second optical communication module;Relay is connected with measuring equipment and unattended equipment switch respectively;Unattended equipment switch is communicated with second optical communication module;Power supply is connected with the parts in remote unattended equipment respectively.

Description

Technical Field

[0001] This invention relates to the remote control of unattended equipment, specifically to a remote unattended equipment and its control method and remote control system. Background Technology

[0002] In applications such as regional surveillance and environmental monitoring, it is generally necessary to deploy a large number of unattended devices in a distributed manner over a wide area. Some devices need to work for a long time, while others only need to be turned on during emergencies or routine inspections. This can greatly reduce the capacity requirements of the power system, making it easier to deploy lightweight unattended systems in harsh outdoor environments and reducing the engineering requirements for infrastructure and protection.

[0003] Currently, a common approach is for a manned central station to send commands via the network to the control system of remote unattended equipment. The control system then executes these commands to power on / off various branch subsystems, thereby completing corresponding monitoring and measurement tasks. In this approach, the network switches and control systems within the remote unattended equipment are constantly powered. While sleep mode can reduce power consumption, prolonged operation can cause some electronic components to age, making replacement time-consuming and labor-intensive during large-scale deployments. Furthermore, for lightweight unattended equipment, environmental or usage limitations prevent the installation of solar panels or other power supplementation devices. Continuous low-power output can also lead to battery depletion, ultimately causing the system to malfunction. Summary of the Invention

[0004] This invention provides a remote unattended device and its control method and remote control system, which are used to solve the problems of high energy consumption, easy aging of electronic components and battery depletion caused by continuous low power output in current remote unattended devices.

[0005] This invention uses an online optical power meter to detect the laser power in the communication optical fiber to determine the power-on / off status of the central station, thereby controlling the remote unattended equipment to power on or off, thus reducing system power consumption and improving overall standby time and lifespan.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A remote unattended device includes a second optical communication module, a measuring device, a power supply, and an unattended device switch, and is characterized by:

[0008] It also includes remote switch control devices;

[0009] The remote switch control device includes an online optical power meter, a current-to-voltage conversion circuit, and a comparator circuit connected in sequence. The output terminal of the comparator circuit is connected to the control terminal of a relay. The relay includes three sets of normally open contacts.

[0010] The online optical power meter is connected to the second optical communication module; the online optical power meter is used to receive the total communication laser emitted by the manned central station, divide the total communication laser into a first communication laser and a second communication laser, convert the first communication laser into photocurrent and send it into a current-voltage conversion circuit, and send the second communication laser into the second optical communication module.

[0011] One end of each of the three sets of normally open contacts of the relay is connected to the output terminal of the power supply, and the other end of each set of normally open contacts is connected to the power supply terminals of the second optical communication module, the measuring device, and the unattended equipment switch.

[0012] The unattended equipment switch is connected to the second optical communication module; the unattended equipment switch is connected to the measurement equipment;

[0013] The output terminal of the power supply is connected to the power supply terminals of the online optical power meter, the current-to-voltage conversion circuit, the comparator circuit, and the relay, respectively, for power supply.

[0014] A remote control system, based on the aforementioned remote unattended equipment, is characterized in that it includes a manned central station and N remote unattended devices; the manned central station includes a control computer, a central station switch, and a first optical communication module.

[0015] The control computer is connected to the central station switch, and the central station switch is connected to the first optical communication module. The first optical communication module is used to emit the total communication laser and is connected to N online optical power meters respectively through communication optical fibers.

[0016] A control method for a remote unattended device, characterized by the following steps:

[0017] Step 1: The online optical power meter monitors in real time whether it receives the total communication laser emitted by the manned central station. If the online optical power meter receives the total communication laser, then proceed to Step 2.

[0018] Step 2: The online optical power meter divides the total communication laser into a first communication laser and a second communication laser, and converts the first communication laser into photocurrent, while the second communication laser enters the second optical communication module for optical communication.

[0019] Step 3: The photocurrent is converted into a voltage signal by a current-to-voltage conversion circuit, and the voltage signal is positively correlated with the laser power of the first communication laser.

[0020] Step 4: The voltage signal enters the comparator circuit. When the amplitude of the voltage signal is greater than the threshold voltage preset in the comparator circuit, the output of the comparator circuit inputs a high-level signal to the control terminal of the relay.

[0021] Step 5: Under the control of a high-level signal, the normally open contact of the relay closes, connecting the power supply to the second optical communication module, the unattended equipment switch, and the measuring equipment.

[0022] Step 6: The second optical communication module, the unattended equipment switch, and the measurement equipment establish a communication link with the manned central station;

[0023] After completing the corresponding task, the measuring equipment transmits the data to the manned central station in sequence through the unattended equipment switch, the second optical communication module and the online optical power meter;

[0024] Step 7: After the manned central station receives the task completion signal, it stops sending the total communication laser. The laser power received by the online optical power meter decreases. When the amplitude of the voltage signal output by the current-voltage conversion circuit drops below the threshold voltage preset in the comparator circuit, the comparator circuit outputs a low-level signal. Under the action of the low-level signal, the relay controls the normally open contact to disconnect. The second optical communication module, the unattended equipment switch, and the measuring equipment stop working. Return to step 1.

[0025] Further, in step 2, the first communication laser accounts for 1%-5% of the total communication laser, and the second communication laser accounts for 99%-95% of the total communication laser.

[0026] Furthermore, the first communication laser accounts for 1% of the total communication laser, and the second communication laser accounts for 99% of the total communication laser.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. This invention uses an online optical power meter to bypass and split the total communication laser beam, with a splitting ratio of less than 5%. The remaining total communication laser beam is used for communication, ensuring a complete optical communication link. There are no intermediate conversion or switching components, so no new additional time delays are introduced, and the link transmission efficiency is not reduced.

[0029] 2. This invention uses an online optical power meter to monitor the laser power in the communication optical fiber and thereby determine the power-on / off status of the unattended central station. This eliminates the need for a manned central station to send control commands to start the remote unattended equipment, thus reducing the design complexity of the switch control device.

[0030] 3. In this invention, only the online optical power meter, current-to-voltage conversion circuit, comparator circuit, and relay are continuously powered in the remote unattended equipment. The switch, second optical communication module, and other equipment in the unattended equipment are all powered off, which helps to reduce the overall standby power consumption of the system. The standby power consumption of the remote switch control device is very small, only 0.3W. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a remote control system according to an embodiment of the present invention.

[0032] The accompanying figure is labeled as follows:

[0033] 1-Control computer, 2-Central station switch, 3-First optical communication module, 4-Online optical power meter, 5-Current-voltage conversion circuit, 6-Comparison circuit, 7-Relay, 8-Second optical communication module, 9-Measuring equipment, 10-Power supply, 11-Unattended equipment switch. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figure 1 As shown, a remote control system includes a manned central station and a large number of remote unattended devices distributed over a wide area, connected by optical fiber communication. The manned central station deploys a control computer 1, a central station switch 2, and a first optical communication module 3, connected sequentially. The control computer 1 connects to the remote unattended devices via the central station switch 2 and the first optical communication module 3, running data analysis and display software for operator decision-making.

[0036] The remote unattended equipment includes a remote switch control device, a second optical communication module 8, an unattended equipment switch 11, a measuring device 9, and a power supply 10. The output of the first optical communication module 3 is connected to the input of the remote switch control system. The power supply 10 supplies power to the remote switch control device, the second optical communication module 8, the unattended equipment switch 11, and the measuring device 9. The output of the remote switch control device is connected to the inputs of the second optical communication module 8, the unattended equipment switch 11, and the measuring device 9, respectively. The second optical communication module 8 and the unattended equipment switch 11 are interconnected. The measuring device 9 is the main workload of the unattended system, implementing the system's main functions, such as area surveillance and environmental monitoring. The second optical communication module 8 and the unattended equipment switch 11 are responsible for transmitting data obtained by the measuring device 9 and status information of other devices to the manned central station via network data, and for receiving other control commands sent by the manned central station. The power supply 10 provides the electrical energy required by each system, typically using lead-acid batteries or lithium batteries, and can be supplemented by external solar panels.

[0037] The remote switch control device includes an online optical power meter 4, a current-to-voltage conversion circuit 5, a comparator circuit 6, and a relay 7 connected in sequence. The online optical power meter 4 receives a portion of the optical power from the first optical communication module 3 and outputs a weak electrical signal. The current-to-voltage conversion circuit 5 receives the optical signal output by the online optical power meter 4 and performs signal amplification and impedance transformation. The comparator circuit 6 can be set with a threshold value for comparison to eliminate noise in the online optical power meter 4 and the current-to-voltage conversion circuit 5, determine whether the first optical communication module 3 is transmitting a normal laser signal, and output different voltage values ​​when the operating state of the first optical communication module 3 changes. The relay 7 changes its operating state according to the different voltage values ​​output by the comparator circuit 6 to realize the function of remote switching, and further realizes the opening and closing of the second optical communication module 8, the measuring device 9, and the unattended equipment switch 11 through the control power supply 10.

[0038] The remote switch control device is powered by power supply 10 and is always powered on. The online optical power meter 4 is interconnected with the first optical communication module 3 and the second optical communication module 8 respectively; one end of the three sets of normally open contacts of the relay 7 is connected to the output terminal of the power supply 10 respectively, and the other end of the three sets of normally open contacts is connected to the power supply terminal of the second optical communication module 8, the measuring device 9 and the unattended equipment switch 11 respectively.

[0039] A control method for a remote unattended device based on the above-mentioned remote unattended device includes the following steps:

[0040] Step 1: The control computer 1, central station switch 2, and first optical communication module 3 in the manned central station are turned on. The first optical communication module 3 emits a communication laser, which is transmitted to the remote unmanned equipment via long-distance communication optical fiber.

[0041] Step 2: In the remote unattended equipment, the online optical power meter 4 in the remote switch control device splits the total communication laser emitted by the first optical communication module 3 of the manned central station. A portion of the laser with a splitting ratio of 1%-5% is converted into photocurrent by the online optical power meter 4, while the remaining 99%-95% of the laser enters the second optical communication module 8 for normal optical communication.

[0042] Step 3: The photocurrent output by the online optical power meter 4 is amplified into a voltage signal by the current-to-voltage conversion circuit 5. This voltage signal is positively correlated with the laser power obtained by the online optical power meter 4 through beam splitting. When the laser power in the optical fiber increases, the amplitude of this voltage signal increases.

[0043] Step 4: The voltage signal enters the comparator circuit 6. When the amplitude of the voltage signal is greater than the preset threshold voltage, the comparator circuit 6 outputs a high level to the control terminal of the relay 7.

[0044] Step 5: Relay 7 closes under the control of the high-level signal output by comparator circuit 6, connecting power supply 10 to the second optical communication module 8, unattended equipment switch 11 and measuring equipment 9.

[0045] Step Six: After the second optical communication module 8 and the unattended equipment switch 11 are powered on, a network connection is established with the first optical communication module 3 and the central station switch 4 in the manned central station. The measuring equipment 9 is powered on and completes the corresponding tasks, and transmits the data to the control computer 1 through the unattended equipment switch 11, the second optical communication module 8, the online optical power meter 4, the first optical communication module 3 and the central station switch 2.

[0046] Step 7: When the control computer 1 receives the signal that the task is completed, the manned central station is shut down, all equipment is powered off, the first optical communication module 3 stops sending communication lasers, the laser power received by the online optical power meter 4 decreases, and the amplitude of the converted voltage signal decreases.

[0047] Step 8: When the voltage signal drops below the preset threshold voltage, the comparator circuit 6 outputs a low level, the relay 7 disconnects the power supply 10, and the second optical communication module 8, the unattended equipment switch 11, and the measuring equipment 9 stop working.

[0048] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A remote unattended device, comprising a second optical communication module (8), a measuring device (9), a power supply (10), and an unattended device switch (11), characterized in that: It also includes remote switch control devices; The remote switch control device includes an online optical power meter (4), a current-to-voltage conversion circuit (5), and a comparator circuit (6) connected in sequence. The output terminal of the comparator circuit (6) is connected to the control terminal of the relay (7). The relay includes three sets of normally open contacts. The online optical power meter (4) is connected to the second optical communication module (8); the online optical power meter (4) is used to receive the total communication laser emitted by the manned central station for optical communication, and to divide the total communication laser into the first communication laser and the second communication laser in a bypass splitting manner, and to convert the first communication laser into photocurrent and send it into the current-voltage conversion circuit (5), and to send the second communication laser into the second optical communication module (8) in order to maintain the integrity and transmission efficiency of the optical communication link; One end of the three sets of normally open contacts of the relay (7) is connected to the output end of the power supply (10), and the other end of the three sets of normally open contacts is connected to the power supply end of the second optical communication module (8), the measuring device (9) and the unattended equipment switch (11), respectively, to control the power supply of the second optical communication module (8), the measuring device (9) and the unattended equipment switch (11) to reduce the standby power consumption of the system. The unattended equipment switch (11) is connected to the second optical communication module (8); the unattended equipment switch (11) is connected to the measuring device (9); The output terminal of the power supply (10) is connected to the power supply terminals of the online optical power meter (4), the current-to-voltage conversion circuit (5), the comparison circuit (6), and the relay (7) respectively, for power supply.

2. A remote control system, based on the remote unattended equipment as described in claim 1, characterized in that: It includes a manned central station and N remote unmanned devices; the manned central station includes a control computer (1), a central station switch (2) and a first optical communication module (3); The control computer (1) is connected to the central station switch (2), and the central station switch (2) is connected to the first optical communication module (3). The first optical communication module (3) is used to transmit the total communication laser. The first optical communication module (3) is connected to N online optical power meters (4) through communication optical fibers respectively.

3. A control method for a remote unattended device as described in claim 1, characterized in that, The steps include the following: Step 1: The online optical power meter (4) monitors in real time whether it receives the total communication laser emitted by the manned central station. If the online optical power meter (4) receives the total communication laser, then proceed to step 2. Step 2, the online optical power meter (4) divides the total communication laser into the first communication laser and the second communication laser by bypassing the beam splitting, and converts the first communication laser into photocurrent, while the second communication laser enters the second optical communication module (8) for optical communication, while maintaining the integrity and transmission efficiency of the optical communication link; The first communication laser accounts for 1%-5% of the total communication laser, and the second communication laser accounts for 99%-95% of the total communication laser; Step 3: The photocurrent is converted into a voltage signal by the current-to-voltage conversion circuit (5), and the voltage signal is positively correlated with the laser power of the first communication laser. Step 4: The voltage signal enters the comparator circuit (6). When the amplitude of the voltage signal is greater than the threshold voltage preset in the comparator circuit (6), the output terminal of the comparator circuit (6) inputs a high-level signal to the control terminal of the relay (7). Step 5: Under the control of a high-level signal, the normally open contact of the relay (7) closes, connecting the power supply to the second optical communication module (8), the unattended equipment switch (11), and the measuring equipment (9); Step 6: The second optical communication module (8), the unattended equipment switch (11), and the measuring equipment (9) establish a communication link with the manned central station; After the measuring device (9) completes the corresponding task, it transmits the data to the manned central station through the unattended equipment switch (11), the second optical communication module (8) and the online optical power meter (4) in sequence; Step 7: After the manned central station receives the task completion signal, it stops sending the total communication laser. The laser power received by the online optical power meter (4) decreases. When the amplitude of the voltage signal output by the current-voltage conversion circuit (5) drops to less than the threshold voltage preset in the comparison circuit (6), the comparison circuit (6) outputs a low-level signal. Under the action of the low-level signal, the relay (7) controls the normally open contact to disconnect. The second optical communication module (8), the unmanned equipment switch (11), and the measuring equipment (9) stop working. Return to step 1.

4. The control method for a remote unattended device according to claim 3, characterized in that: The first communication laser accounts for 1% of the total communication laser, and the second communication laser accounts for 99% of the total communication laser.

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