Novel intelligent well lid control system and method based on 4G + multi-source sensing

Abstract

The invention relates to the technical field of Internet of Things and smart cities, in particular to a novel smart well lid control system and method based on 4G + multi-source sensing, and the system comprises a well lid handle, a well lid smart lock, a power supply module, a photoelectric isolation circuit, a relay circuit and a 4G module. Under the normal condition, the well lid is locked through the well lid intelligent lock, when the well lid needs to be opened, a well lid handle is twisted, a switching value is provided for the optoelectronic isolation circuit, after the optoelectronic isolation circuit receives the switching value, the circuit is connected, a low level is output to the 4G module, the 4G module outputs a low level to the relay circuit, and after the relay circuit receives the low level, the circuit is switched on. According to the intelligent well lid control system, later-stage additional installation is carried out on the basis of an original well lid, a large amount of expenditure caused by large-scale replacement and elimination of old-fashioned equipment is avoided, the difficulty of popularization of the intelligent well lid in cities is lowered, and the intelligent well lid control system is suitable for popularization of the intelligent well lid in cities. And meanwhile, the cost of widely installing the intelligent well lid is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of Internet of Things and smart city, and in particular to a new smart manhole cover control system and method based on 4G+ multi-source sensing. Background Art

[0002] Manhole covers are used to cover deep wells on roads or in homes to prevent people or objects from falling. Manhole covers used on roads are an important part of the urban drainage system. They can prevent urban waterlogging and ensure the drainage function of the city; prevent people from falling and ensure the safety of people's lives, and play a very important role in urban planning.

[0003] With the development of science and technology and the deepening of smart city construction, the emergence of smart manhole covers has effectively solved the problems of traditional manhole covers, such as uneven quality, easy damage, easy loss, difficult to find after loss, causing harm to the lives and safety of pedestrians, and management and maintenance consuming a lot of time and manpower.

[0004] Smart manhole cover technology is a comprehensive solution that integrates technologies such as the Internet of Things, communications, and data processing. By installing a communication module and control system on the manhole cover, real-time monitoring and remote control of the manhole cover status can be achieved. This technology is integrated with other parts of the urban drainage system to form a complete smart drainage system. Smart manhole cover technology can reduce safety accidents caused by manhole cover problems and improve safety; at the same time, real-time monitoring and remote control of the manhole cover status can be carried out to promote the construction of smart cities.

[0005] Many of the current smart manhole cover devices are too complex in design, high in cost, large in size, easy to damage, difficult to install, and have a shorter service life than traditional manhole covers. The deployment and maintenance costs of smart manhole covers are relatively high, requiring continuous technical support and continuous capital investment, including hardware equipment costs, communication costs, and maintenance costs. Summary of the invention

[0006] The purpose of the present invention is to provide a new intelligent manhole cover control system and method based on 4G+ multi-source sensing, aiming to solve the problems of existing intelligent manhole cover equipment being too complex in design, high in cost, large in size, easy to damage, difficult to install, and short in service life.

[0007] To achieve the above objectives, in the first aspect, the present invention provides a new intelligent manhole cover control system based on 4G+ multi-source sensing, including a manhole cover handle, a manhole cover smart lock, a power supply module, a photoelectric isolation circuit, a relay circuit and a 4G module;

[0008] The manhole cover handle is used to twist the manhole cover to provide a switch value;

[0009] The manhole cover intelligent lock is used to electrically lock the manhole cover, and when the relay coil is activated by current, the relay contacts open, thereby opening the manhole cover;

[0010] The power supply module is used to provide power to the photoelectric isolation circuit, the relay circuit, the 4G module and the manhole cover smart lock;

[0011] The photoelectric isolation circuit is used for photoelectric isolation and protection circuit. When someone twists the manhole cover handle and provides a switch quantity, the circuit is turned on and outputs a low level to the 4G module.

[0012] The relay circuit generates an electromagnetic effect based on the low level input by the 4G module, causing the contact to change from normally closed to normally open, thereby opening the manhole cover smart lock;

[0013] The 4G module is used to control the switch of the manhole cover smart lock, and transmit the data to the host computer in real time and synchronously, remotely control the switch of the manhole cover smart lock, and monitor the current switch status of the manhole cover in real time.

[0014] Among them, the new intelligent manhole cover control system and method based on 4G+multi-source sensing also includes a reserved 485 circuit, and the reserved 485 circuit supplements the circuit functionality based on various needs in practical applications.

[0015] Among them, the photoelectric isolation circuit includes resistor R27, resistor R31, capacitor C30, capacitor C32, LED3 and chip I5181GB, pin 1 of the chip I5181GB, the LED3 and the resistor R27 are connected, the capacitor C30 is respectively connected to pin 1 and pin 3 of the chip I5181GB, pin 6 of the chip I5181GB is connected to the resistor R31, and the capacitor C32 is respectively connected to pin 6 and pin 4 of the chip I5181GB.

[0016] Among them, the relay circuit includes a relay K1, a resistor R22, a resistor R23, a resistor R24, an LED1, a diode D3, a capacitor C24 and a transistor Q1, the pin 5 of the relay K1, the resistor R22 and the LED1 are connected, the transistor Q1 is connected to the pin 2 of the relay K1, the resistor R23 and the resistor R24, the capacitor C24 is respectively connected to the resistor R22 and the LED1, and the diode D3 is respectively connected to the pin 5 and pin 2 of the relay K1.

[0017] In a second aspect, the present invention further provides a new intelligent manhole cover control method based on 4G+multi-source sensing, which is applied to the new intelligent manhole cover control system based on 4G+multi-source sensing as described in the first aspect above, comprising the following steps:

[0018] Under normal circumstances, the manhole cover is locked by the manhole cover intelligent lock. When the manhole cover needs to be opened, the manhole cover handle is twisted to provide a switch quantity to the photoelectric isolation circuit;

[0019] After the photoelectric isolation circuit receives the switch value, the circuit is turned on and a low level is output to the 4G module;

[0020] After receiving the low level, the 4G module outputs a low level to the relay circuit. After the relay circuit receives the low level, the circuit is turned on, and the contact changes from normally closed to normally open, so that the manhole cover smart lock opens and the manhole cover is opened.

[0021] The present invention discloses a new intelligent manhole cover control system based on 4G+ multi-source sensing. The manhole cover handle is used to twist the manhole cover and provide a switch quantity. The manhole cover smart lock is connected to the common end (COM2) of the relay. The electric control lock will lock the manhole cover at ordinary times to prevent the manhole cover from being washed away by fierce water flow or accidentally opened and dropped when pedestrians pass by and step on the manhole cover, thereby improving safety. When the relay coil is activated by current, the relay contact opens, thereby turning on the switch of the manhole cover smart lock. The power supply module has two, namely, a 5V stabilized power supply circuit and a 3.3V stabilized power supply circuit, which provide power to the photoelectric isolation circuit, the relay circuit, the 4G module and the manhole cover smart lock. The photoelectric isolation circuit normally inputs a low level from CH2- and is directly grounded. The circuit realizes photoelectric isolation through an optical coupler to prevent the circuit from burning out. When the manhole cover handle provides a switch quantity to the photoelectric isolation circuit, the CH2+ of the photoelectric isolation circuit inputs a high level, and then LED3 lights up and emits light, and the light-emitting diode is turned on and generates a light signal. After receiving the light signal, the phototransistor is connected with the light-emitting diode, and then outputs a low level to CH2, which is transmitted to the 4G module. After receiving the low level, the 4G module will input a low level from S2 of the relay circuit. After receiving the low level signal from the 4G module, the relay circuit turns on the transistor and the circuit is energized. The relay K1 coil is powered by a 5V power supply. When current flows through the coil, an electromagnetic effect is generated, and a magnetic field is generated to attract the iron core to move, thereby changing the contact from normally closed to normally open. The normally open contact (NO2) of relay K1 is opened, allowing current to flow from the COM2 terminal to the LED1 bulb. At the same time, the common terminal (COM2) is connected to the manhole cover smart lock. When the relay coil is activated by current, the relay contact is opened, so that the switch of the manhole cover smart lock is turned on or off. The 4G module transmits data to the host computer in real time and synchronously, and the switch of the manhole cover can be remotely controlled. The 4G module can be remotely controlled to lock the state of the smart lock, so that it is always locked, and the manhole cover is prohibited from being opened in any way. Avoid abnormal situations such as the manhole cover being washed away due to rainwater backflow, or children opening the manhole cover without knowing the situation, which may damage the life and property of others. If the manhole cover needs to be opened for construction, the lock state of the smart lock can be released after communicating with the control center, and the manhole cover can be opened normally. At the same time, real-time monitoring of the current switch state of the manhole cover can be achieved. It improves the level of intelligent management and promotes the construction of smart cities. If the host computer data center detects that the manhole cover is suddenly opened, it means that an abnormal situation has occurred (the manhole cover is lost, the manhole cover is washed away by heavy rain, etc.), and the area is prone to safety accidents. At this time, relevant personnel can go to the abnormal location in time to check and troubleshoot.When the manhole cover is lost, the 4G module can also be used to roughly locate the lost manhole cover for easy retrieval. Under normal circumstances, the manhole cover is locked by the manhole cover smart lock. When the manhole cover needs to be opened, the manhole cover handle is twisted to provide a switch quantity to the photoelectric isolation circuit. After the photoelectric isolation circuit receives the switch quantity, the circuit is turned on and a low level is output to the 4G module. After the 4G module receives the low level, it outputs a low level to the relay circuit. After the relay circuit receives the low level, the circuit is turned on and the contact changes from normally closed to normally open, so that the manhole cover smart lock is opened and the manhole cover is opened. The smart manhole cover control system is installed later on the basis of the original manhole cover. There is no need to eliminate the old manhole covers that have been produced and are in use, avoiding the large amount of expenses caused by large-scale replacement and elimination of old equipment, reducing the difficulty of popularizing smart manhole covers in cities, and also reducing the cost of widely installing smart manhole covers and reducing the expenditure on urban infrastructure construction. The smart manhole cover control system is simple in design, complete in function, and low in cost. It removes too many unnecessary designs, making the equipment small and exquisite, easy to install and not easy to damage. Improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a connection diagram of a new intelligent manhole cover control system based on 4G+ multi-source sensing provided by the present invention.

[0024] Figure 2 It is a schematic diagram of the photoelectric isolation circuit provided by the present invention.

[0025] Figure 3 It is a schematic diagram of a relay circuit provided by the present invention.

[0026] Figure 4 It is a schematic diagram of the power supply module provided by the present invention (5V voltage-regulated power supply circuit).

[0027] Figure 5 It is a schematic diagram of the power supply module (3.3V voltage-regulated power supply circuit) provided by the present invention.

[0028] Figure 6 This is a schematic diagram of the reserved 485 circuit provided by the present invention.

[0029] Figure 7 This is a schematic diagram of a 4G module circuit provided by the present invention.

[0030] Figure 8 This is a flow chart of a new intelligent manhole cover control method based on 4G+ multi-source sensing provided by the present invention.

[0031] In the figure: 1-manhole cover handle, 2-manhole cover smart lock, 3-power supply module, 4-photoelectric isolation circuit, 5-relay circuit, 6-4G module, 7-reserved 485 circuit. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] See also Figures 1 to 7 In the first aspect, the present invention provides a new intelligent manhole cover control system based on 4G+ multi-source sensing, including a manhole cover handle 1, a manhole cover smart lock 2, a power supply module 3, a photoelectric isolation circuit 4, a relay circuit 5 and a 4G module 6;

[0034] The manhole cover handle 1 is used to twist the manhole cover and provide a switch value;

[0035] The manhole cover intelligent lock 2 is used to electrically lock the manhole cover, and when the relay coil is activated by current, the relay contacts are opened, thereby opening the manhole cover;

[0036] The power supply module 3 is used to provide power to the photoelectric isolation circuit 4, the relay circuit 5, the 4G module 6 and the manhole cover smart lock 2;

[0037] The photoelectric isolation circuit 4 is a photoelectric isolation protection circuit. When someone twists the manhole cover handle 1 and provides a switch quantity, the circuit is turned on and outputs a low level to the 4G module 6;

[0038] The relay circuit 5 generates an electromagnetic effect based on the low level input by the 4G module 6, so that the contact changes from normally closed to normally open, thereby opening the manhole cover smart lock 2;

[0039] The 4G module 6 is used to control the switch of the manhole cover smart lock 2, and transmit the data to the host computer in real time and synchronously, remotely control the switch of the manhole cover smart lock 2, and monitor the current switch status of the manhole cover in real time.

[0040] In the embodiment of the present invention, the manhole cover handle 1 is used to twist the manhole cover and provide a switch quantity. The manhole cover smart lock 2 is connected to the common end (COM2) of the relay. Normally, the electric control lock will lock the manhole cover to prevent the manhole cover from being washed away by fierce water flow or accidentally opened and dropped when pedestrians pass by and step on the manhole cover, thereby improving safety. When the relay coil is activated by current, the relay contact opens, thereby turning on the switch of the manhole cover smart lock 2. The power supply module 3 has two, namely, a 5V regulated power supply circuit and a 3.3V regulated power supply circuit, which provide power to the photoelectric isolation circuit 4, the relay circuit 5, the 4G module 6 and the manhole cover smart lock 2. The photoelectric isolation circuit 4 normally inputs a low level from CH2- and is directly grounded. The circuit realizes photoelectric isolation through an optical coupler to prevent the circuit from burning out. When the manhole cover handle 1 provides a switch quantity to the photoelectric isolation circuit 4, the CH2+ of the photoelectric isolation circuit 4 inputs a high level, and then the LED3 lights up and emits light, and the light-emitting diode is turned on and generates a light signal. After receiving the light signal, the phototransistor is connected with the light-emitting diode, and then outputs a low level to CH2, which is transmitted to the 4G module 6. After receiving the low level, the 4G module 6 will input a low level from S2 of the relay circuit 5. After receiving the low level signal from the 4G module, the relay circuit 5 turns on the transistor and the circuit is energized. The relay K1 coil is powered by a 5V power supply. When current flows through the coil, an electromagnetic effect is generated, and a magnetic field is generated to attract the iron core to move, thereby changing the contact from normally closed to normally open. The normally open contact (NO2) of relay K1 is opened, allowing current to flow from the COM2 terminal to the LED1 bulb. At the same time, the common terminal (COM2) is connected to the manhole cover smart lock 2. When the relay coil is activated by current, the relay contact is opened, so that the switch of the manhole cover smart lock 2 is turned on or off. The 4G module 6 transmits data to the host computer in real time and synchronously, and the switch of the manhole cover can be remotely controlled. The 4G module 6 can be remotely controlled to lock the state of the smart lock, so that it is always locked, and the manhole cover is prohibited from being opened in any way. Avoid abnormal situations such as the manhole cover being washed away due to rainwater backflow, or children opening the manhole cover without knowing the situation, which may damage the life and property of others. If the manhole cover needs to be opened for construction, the lock state of the smart lock can be released after communicating with the control center, and the manhole cover can be opened normally. At the same time, real-time monitoring of the current switch state of the manhole cover can be achieved. It improves the level of intelligent management and promotes the construction of smart cities. If the host computer data center detects that the manhole cover is suddenly opened, it means that an abnormal situation has occurred (the manhole cover is lost, the manhole cover is washed away by heavy rain, etc.), and the area is prone to safety accidents. At this time, relevant personnel can go to the abnormal location in time to check and troubleshoot.When the manhole cover is lost, the 4G module 6 can also be used to roughly locate the lost manhole cover to facilitate retrieval. Under normal circumstances, the manhole cover is locked by the manhole cover smart lock 2. When the manhole cover needs to be opened, the manhole cover handle 1 is twisted to provide a switch quantity to the photoelectric isolation circuit 4. After the photoelectric isolation circuit 4 receives the switch quantity, the circuit is turned on and a low level is output to the 4G module 6. After the 4G module 6 receives the low level, it outputs a low level to the relay circuit 5. After the relay circuit 5 receives the low level, the circuit is turned on and the contacts are switched from normally closed to open. The manhole cover intelligent lock 2 is normally open, and the manhole cover is opened. The smart manhole cover control system is installed later on the basis of the original manhole cover, and there is no need to eliminate the old manhole covers that have been produced and are in use, avoiding the large amount of expenses caused by large-scale replacement and elimination of old equipment, reducing the difficulty of popularizing smart manhole covers in cities, and also reducing the cost of widely installing smart manhole covers, reducing the expenditure on urban infrastructure construction, the smart manhole cover control system is simple in design, fully functional, and low in cost, removing too many unnecessary designs, making the equipment small and exquisite, easy to install and not easy to damage. Improve production efficiency and reduce production costs.

[0041] Furthermore, the new intelligent manhole cover control system and method based on 4G+ multi-source sensing also includes a reserved 485 circuit 7, and the reserved 485 circuit 7 supplements the circuit functionality based on various needs in practical applications.

[0042] In the embodiment of the present invention, the reserved 485 circuit 7 can be functionally supplemented according to various requirements in practical applications. For example, it can be connected to other sensors and use other methods to control whether the manhole cover is open. Or it can be connected to a series of water conservancy equipment supporting the 485 protocol, such as a rain gauge, to supplement the circuit functionally.

[0043] Furthermore, the photoelectric isolation circuit 4 includes a resistor R27, a resistor R31, a capacitor C30, a capacitor C32, an LED3 and a chip I5181GB, pin 1 of the chip I5181GB, the LED3 and the resistor R27 are connected, the capacitor C30 is respectively connected to pin 1 and pin 3 of the chip I5181GB, pin 6 of the chip I5181GB is connected to the resistor R31, and the capacitor C32 is respectively connected to pin 6 and pin 4 of the chip I5181GB.

[0044] In the embodiment of the present invention, the photoelectric isolation circuit 4 usually inputs a low level to CH2-, directly grounded, and photoelectrically isolated to prevent the circuit from burning out; when someone opens the manhole cover, it is regarded as providing a switch quantity from the peripheral, and CH2+ inputs a high level; when CH2+ inputs a high level, the LED3 lights up and emits light, and at the same time the light emitting diode is turned on and generates a light signal. After receiving the light signal, the photoelectric transistor is turned on with the light emitting diode, and then outputs a low level to CH2, which is transmitted to the 4G module 6. After receiving the low level, the 4G module 6 controls the relay to perform subsequent work. The capacitor C30 and the C32 are used for filtering and stabilizing the circuit, and the resistor R27 and the resistor R31 are used for current limiting to protect the LED lamp from being burned out by excessive current.

[0045] Furthermore, the relay circuit 5 includes a relay K1, a resistor R22, a resistor R23, a resistor R24, an LED1, a diode D3, a capacitor C24 and a transistor Q1, the pin 5 of the relay K1, the resistor R22 and the LED1 are connected, the transistor Q1 is connected to the pin 2 of the relay K1, the resistor R23 and the resistor R24, the capacitor C24 is respectively connected to the resistor R22 and the LED1, and the diode D3 is respectively connected to the pin 5 and pin 2 of the relay K1.

[0046] In the embodiment of the present invention, the 4G module 6 inputs a low level from S2 to turn on the transistor Q1, and the circuit is energized. The relay K1 coil is powered by a 5V power supply. When current flows through the coil, an electromagnetic effect is generated, and a magnetic field is generated to attract the iron core to move, thereby changing the contact from normally closed to normally open. The normally open contact (NO2) of the relay K1 is opened, allowing current to flow from the COM2 terminal to the LED1. The common terminal (COM2) is connected to the peripheral device. When the relay coil is activated by current, the relay contact opens, thereby turning the switch of the peripheral device on or off. The diode D3 conducts unidirectionally to protect the circuit. The resistors R22, R23 and R24 are used to limit the current flow to avoid damage to the circuit due to excessive current. The LED1 reflects the working state of the circuit. When the LED1 emits light, it indicates that the circuit is working normally.

[0047] Furthermore, the power supply module 3 is a 5V stabilized power supply circuit and a 3.3V stabilized power supply circuit, which can convert a 12V power supply into a 5V power supply. The power supply voltage is adjusted to ensure that it is stable at about 5V, and the 5V power supply can be converted into a 3.3V power supply. The power supply voltage is adjusted to ensure that it is stable at about 3.3V.

[0048] The 4G module 6 performs wireless communication and has the following advantages over NB-IoT:

[0049] 1. Fast response: The 4G module 6 has a much higher transmission rate, so it has a faster response speed and can react faster when abnormal conditions occur.

[0050] 2. Strong stability: Due to the long-term use of 4G network technology, the coverage of 4G network has been very extensive and stable. Working in a shallow underground environment such as under a manhole cover, its reliability is not worse than NB-IoT, and may even be better. The high communication quality can ensure the normal operation of the equipment.

[0051] 3. Mature technical ecosystem: 4G technology is more mature than NB-IoT technology and has a mature technical ecosystem, which makes it convenient to provide various services and adapt to various other devices. It has a wider range of application scenarios and is convenient for providing software services and installing other equipment.

[0052] 4. High security: 4G has higher data encryption and security performance, which improves equipment security and protects the life and property of others.

[0053] See also Figure 8 In a second aspect, the present invention further provides a new intelligent manhole cover control method based on 4G+multi-source sensing, which is applied to the new intelligent manhole cover control system based on 4G+multi-source sensing as described in the first aspect above, and includes the following steps:

[0054] S1 Under normal circumstances, the manhole cover is locked by the manhole cover intelligent lock 2. When the manhole cover needs to be opened, the manhole cover handle 1 is twisted to provide a switch quantity to the photoelectric isolation circuit 4;

[0055] In an embodiment of the present invention, under normal circumstances, the manhole cover is locked by the manhole cover smart lock 2 (external device 2) to prevent the manhole cover from being opened. When the manhole cover needs to be opened, the manhole cover handle 1 (external device 1) is twisted to provide a switch quantity to the photoelectric isolation circuit 4.

[0056] S2 After the photoelectric isolation circuit 4 receives the switch value, the circuit is turned on and a low level is output to the 4G module 6;

[0057] In the embodiment of the present invention, after the photoelectric isolation circuit 4 receives the switch value (CH2+input high level), the circuit is turned on, and then a low level is output to the 4G module 6 through CH2.

[0058] S3 After the 4G module 6 receives the low level, it outputs a low level to the relay circuit 5. After the relay circuit 5 receives the low level, the circuit is turned on, and the contact changes from normally closed to normally open, so that the manhole cover smart lock 2 is opened and the manhole cover is opened.

[0059] In the embodiment of the present invention, after the 4G module 6 receives a low level through the IO port, it outputs a low level to the relay circuit 5. After the relay circuit 5 receives the low level (S2 inputs a low level), the circuit is turned on, and the contact changes from normally closed to normally open, so that the manhole cover smart lock 2 (external device 2) connected to the common end is opened. Then the manhole cover can be opened.

[0060] What is disclosed above is only a preferred embodiment of the new intelligent manhole cover control system and method based on 4G+multi-source sensing of the present invention. Of course, it cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the present invention are still within the scope of the invention.

Claims

1. A new intelligent manhole cover control system based on 4G+ multi-source sensing, characterized in that ； Including manhole cover handle, manhole cover smart lock, power supply module, photoelectric isolation circuit, relay circuit and 4G module; The manhole cover handle is used to twist the manhole cover to provide a switch value; The manhole cover intelligent lock is used to electrically lock the manhole cover, and when the relay coil is activated by current, the relay contacts open, thereby opening the manhole cover; The power supply module is used to provide power to the photoelectric isolation circuit, the relay circuit, the 4G module and the manhole cover smart lock; The photoelectric isolation circuit is used for photoelectric isolation and protection circuit. When someone twists the manhole cover handle and provides a switch quantity, the circuit is turned on and outputs a low level to the 4G module. The relay circuit generates an electromagnetic effect based on the low level input by the 4G module, causing the contact to change from normally closed to normally open, thereby opening the manhole cover smart lock; The 4G module is used to control the switch of the manhole cover smart lock, and transmit the data to the host computer in real time and synchronously, remotely control the switch of the manhole cover smart lock, and monitor the current switch status of the manhole cover in real time.

2. The new intelligent manhole cover control system based on 4G+ multi-source sensing as claimed in claim 1, It is characterized by: The new intelligent manhole cover control system and method based on 4G+ multi-source sensing also includes a reserved 485 circuit, and the reserved 485 circuit supplements the circuit functionality based on various needs in practical applications.

3. The new intelligent manhole cover control system based on 4G+ multi-source sensing as claimed in claim 1 is characterized in that ； The photoelectric isolation circuit includes a resistor R27, a resistor R31, a capacitor C30, a capacitor C32, an LED3 and a chip I5181GB. Pin 1 of the chip I5181GB, the LED3 and the resistor R27 are connected. The capacitor C30 is respectively connected to pin 1 and pin 3 of the chip I5181GB. Pin 6 of the chip I5181GB is connected to the resistor R31. The capacitor C32 is respectively connected to pin 6 and pin 4 of the chip I5181GB.

4. The new intelligent manhole cover control system based on 4G+ multi-source sensing as claimed in claim 1 is characterized in that ； The relay circuit includes a relay K1, a resistor R22, a resistor R23, a resistor R24, an LED1, a diode D3, a capacitor C24 and a transistor Q1. Pin 5 of the relay K1, the resistor R22 and the LED1 are connected. The transistor Q1 is connected to pin 2 of the relay K1, the resistor R23 and the resistor R24. The capacitor C24 is respectively connected to the resistor R22 and the LED1. The diode D3 is respectively connected to pin 5 and pin 2 of the relay K1.

5. A new intelligent manhole cover control method based on 4G+multi-source sensing, applied to the new intelligent manhole cover control system based on 4G+multi-source sensing as claimed in any one of claims 1-4, characterized in that: The following steps are involved: Under normal circumstances, the manhole cover is locked by the manhole cover intelligent lock. When the manhole cover needs to be opened, the manhole cover handle is twisted to provide a switch quantity to the photoelectric isolation circuit; After the photoelectric isolation circuit receives the switch value, the circuit is turned on and a low level is output to the 4G module; After receiving the low level, the 4G module outputs a low level to the relay circuit. After the relay circuit receives the low level, the circuit is turned on, and the contact changes from normally closed to normally open, so that the manhole cover smart lock opens and the manhole cover is opened.

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