CN114233110B - Locking device for intelligent well lid - Google Patents
Locking device for intelligent well lid Download PDFInfo
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- CN114233110B CN114233110B CN202111476036.3A CN202111476036A CN114233110B CN 114233110 B CN114233110 B CN 114233110B CN 202111476036 A CN202111476036 A CN 202111476036A CN 114233110 B CN114233110 B CN 114233110B
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1427—Locking devices
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00571—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by interacting with a central unit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0057—Feeding
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0057—Feeding
- E05B2047/0058—Feeding by batteries
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0057—Feeding
- E05B2047/0063—Energy transfer from key to lock, e.g. for emergency opening
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Power Engineering (AREA)
- Lock And Its Accessories (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The application relates to a locking device for an intelligent well lid, which comprises an execution module and a control module; the execution module comprises a lock, an execution unit and a first wireless unit, wherein the first wireless unit is connected with a first radio frequency unit; the control module comprises a control unit and a second wireless unit which are electrically connected with a control power supply, and a coil of the second wireless unit is connected with a second radio frequency unit; the control unit modulates a transmitting signal to be transmitted by the second radio frequency unit into a charging signal for the first radio unit to charge the second radio unit, generates a radio signal and then transmits the radio signal to the first radio unit; after the first wireless unit receives the wireless signal, the received electric energy is supplied to the lockset, the execution unit and the first radio frequency unit, the first radio frequency unit demodulates a transmission signal from the wireless signal, and the first radio frequency unit returns a response signal by changing the receiving power of the first wireless unit; the lock has the effect that the lock can work normally when the power supply of the lock is damaged or unexpected power failure occurs.
Description
Technical Field
The application relates to the field of inspection shaft covers, in particular to a locking device for an intelligent well cover.
Background
There are functional pipes in city construction, and the section from the pipe to the ground is called manhole, which is usually flush with the ground and has manhole cover. The inspection well cover is generally made of reinforced cement, metal, reinforced plastic and other materials, and is generally circular.
The existing inspection well covers are added with some additional functions on the basis of original cement well covers, for example, an active electronic lock is added to prevent theft, and the existing inspection well covers are added with wireless transmission and positioning functions, so that related departments can manage the inspection well covers conveniently.
When the inspection well cover of the active electronic lock is actually used, a worker controls the active electronic through a control key, but when an external power supply of the active electronic lock is damaged or accidentally loses power, the worker cannot work the active electronic lock and is difficult to open the inspection well cover.
Disclosure of Invention
In order to enable the active electronic lock to work normally when the power supply of the active electronic lock is damaged or accidentally lost, the application provides a locking device for an intelligent well lid.
The application provides a locking device for intelligent well lid adopts following technical scheme:
a locking device for an intelligent well lid comprises an execution module and a control module which are matched;
the execution module comprises a lock fixedly connected to the well lid and externally connected with a power supply, an execution unit for controlling the lock and detecting the working state of the externally connected power supply, and a first wireless unit for receiving external electric energy, wherein a coil of the first wireless unit is electrically connected with a first radio frequency unit;
the control module comprises a control unit electrically connected with a control power supply and a second wireless unit used for carrying out radio connection with the first wireless unit, and a coil of the second wireless unit is electrically connected with a second radio frequency unit;
the control unit modulates a transmitting signal to be transmitted by the second radio frequency unit into a charging signal for the first radio unit to charge the second radio unit and generates a radio signal, and the second radio unit sends the radio signal to the first radio unit;
after the first wireless unit receives the wireless signal, the first wireless unit supplies the received electric energy to the lockset, the execution unit and the first radio frequency unit, the first radio frequency unit demodulates the transmitting signal from the wireless signal, and after the wireless signal transmission is finished, the first radio frequency unit returns a response signal by changing the receiving power of the first wireless unit.
Through adopting above-mentioned technical scheme, when the external power supply that execution module electricity was connected takes place to damage or lose electricity, the staff can use the control module that is the key end to carry out wireless energy supply for execution module, the second wireless unit sends the electric energy to first wireless unit, the electric energy supplies to the tool to lock, execution unit and first radio frequency unit, if external power supply does not lead to control key can't carry out the communication through original communication route with execution unit, then second radio frequency unit and first radio frequency unit can carry out the communication of data when carrying the electric energy, do benefit to and guarantee that execution module can carry out the instruction of control module, simultaneously first radio frequency unit can be when execution module has the electricity initiatively to send data to second radio frequency module, also can return response signal through changing the received power when execution module does not have the electricity and first wireless unit receives the electric energy, do not influence the supply of electric energy when returning data.
Preferably, the executing unit controls the first wireless unit to use the received electric energy to charge the external power supply if detecting that the electric quantity of the external power supply is low;
after the set time, if the execution unit detects that the electric quantity variation of the external power supply is lower than a preset variation value, when the second wireless unit stops wireless charging, the execution unit controls the first radio frequency unit to send preset state information to the second radio frequency unit by using the residual electric energy in the execution module.
By adopting the technical scheme, the electric energy received by the execution module can maintain the working state of the execution module and can also be used for charging an external power supply, so that a worker can realize wireless charging while using a control key. If the electric quantity of the external power supply is unchanged after the set time, the circuit fault or the external power supply fault is represented, and at the moment, the first radio frequency unit can send state information representing the fault to the second radio frequency unit during charging.
Preferably, said changing the received power of the first wireless unit to return an acknowledgement signal includes:
the first radio frequency unit is electrically connected with an access switch electrically connected with the coil of the first wireless unit in series, the access switch is electrically connected with an access resistor, the access switch is controlled by the first radio frequency unit, the access switch is normally closed and short-circuited with the access resistor, when the first radio frequency unit needs to send preset state information, the access switch is controlled to act, and the access switch connects the access resistor in series to a power receiving loop where the coil of the first wireless unit is located.
By adopting the technical scheme, the first radio frequency unit changes the receiving power by controlling the number of the access resistors connected in the coil to change the impedance, when the access resistors are connected in the coil, the signal frequency of wireless transmission is not affected, but the power of wireless transmission is only affected, and when the power received by the execution unit is shared by the access resistors, the execution unit increases the power received by the execution unit, so that the output power of the second radio unit is increased within a controllable range.
Preferably, the access resistor is electrically connected with an energy storage capacitor in parallel, and when the first radio frequency unit sends preset state information, the access switch is controlled to be disconnected.
By adopting the technical scheme, after the access switch is closed, the access resistor and the energy storage capacitor do not work. When the access switch is disconnected, the energy storage capacitor can not influence the first wireless unit to receive electric energy, but can influence the power received by the first wireless unit, and after electric energy transmission stops, the energy storage capacitor can remain electric energy, and the first radio frequency unit controls the release of electric energy on the energy storage capacitor through controlling the on-off of the coil, so that the wireless signal is sent through the coil.
Preferably, said changing the received power of the first wireless unit to return an acknowledgement signal includes:
the first radio frequency unit is electrically connected with a plurality of filter capacitors which are connected in series with each other and with the coil of the first radio frequency unit in series, and each filter capacitor is electrically connected with a short-circuit switch controlled by the first radio frequency unit in parallel.
By adopting the technical scheme, the first radio frequency unit changes the receiving frequency of the wireless signal by controlling the number of the filter capacitors connected in the coil to change the capacitance reactance so as to change the receiving power, and the transmission quality of the radio frequency signal can be ensured by setting the capacitance value of the filter capacitors to a numerical value which does not influence the transmission of the radio frequency signal.
Preferably, the filter capacitor is electrically connected in parallel with an energy dissipation resistor.
Through adopting above-mentioned technical scheme, after wireless transmission finishes, the power consumption resistor can consume the remaining electric energy of filter capacitor, and protection components and parts can also let the energy on the filter capacitor keep for a longer time simultaneously, do benefit to first radio frequency unit and send radio frequency signal in the certain time.
Preferably, the filter capacitor is electrically connected with an energy dissipation resistor in series, the energy dissipation resistor is electrically connected with the short-circuit switch in parallel, and the short-circuit switch is closed to short-circuit the energy dissipation resistor.
By adopting the technical scheme, the short-circuit switch can change the discharging speed of the filter capacitor by changing the number of the connected energy consumption resistors, and can also change the receiving power of the execution module.
Preferably, the coil of the first wireless unit includes a plurality of groups of sub-coils electrically connected in series, a conduction switch is electrically connected in series between adjacent sub-coils, and the working state of the conduction switch is controlled to be connected with the first radio frequency unit.
Through adopting above-mentioned technical scheme, through the access quantity that changes the sub-coil, can change the transmission distance of radio frequency signal and the sensitivity of received signal, can also change wireless distance and the receiving efficiency that charges simultaneously.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the control module sends electric energy to the first wireless unit through the second wireless unit, and the electric energy is supplied to the lockset, the execution unit and the first radio frequency unit, so that the execution module without electricity can be powered;
2. the control module can also enable the second radio frequency unit and the first radio frequency unit to carry out data communication while transmitting electric energy, so that the execution module can execute the instruction of the control module;
3. the first radio frequency unit can actively send data to the second radio frequency module when the execution module is powered on, and can also return a response signal by changing the receiving power.
Drawings
FIG. 1 is a schematic block diagram of a first embodiment of the present application;
FIG. 2 is a functional block diagram showing an access switch and an access resistor according to an embodiment of the present application;
FIG. 3 is a schematic block diagram showing a filter capacitor in parallel with an energy dissipating resistor in accordance with a second embodiment of the present application;
FIG. 4 is a schematic block diagram showing a filter capacitor in series with an energy dissipating resistor in accordance with an embodiment III of the present application;
fig. 5 is a schematic block diagram showing a plurality of sub-coils connected in series according to the fourth embodiment of the present application.
Reference numerals: 10. an execution module; 11. a lock; 12. an execution unit; 13. a first wireless unit; 14. a first radio frequency unit; 141. an access switch; 142. accessing a resistor; 143. an energy storage capacitor; 144. a filter capacitor; 145. a short-circuit switch; 146. an energy dissipation resistor; 147. turning on a switch; 20. a control module; 21. a control unit; 22. a second wireless unit; 23. a second radio frequency unit; 30. an external power supply; 40. and controlling a power supply.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-5.
Embodiment one:
an embodiment of the application discloses a locking device for intelligent well lid. Referring to fig. 1, a locking device for a smart manhole cover includes a mating execution module 10 and a control module 20.
The execution module 10 can be fixedly connected to the lower surface of the inspection well cover, namely the intelligent well cover through bolts, and a gas detection unit is arranged in the execution module 10 and used for detecting the concentration of dangerous gas in the well. The execution module 10 is further provided with a lock 11, an execution unit 12, a first wireless unit 13 and a first radio frequency unit 14.
The lock 11 can use a bolt lock driven by a motor and a reduction gearbox, the lock 11 can be fixed on the lower surface of the intelligent well cover through bolts or welded on the lower surface of the intelligent well cover, and a bolt of the lock 11 can be clamped with a well cover opening of the inspection well. The lock 11 is electrically connected with an external power supply 30, the external unit can adopt a chargeable mobile power supply with a built-in charging circuit, and the external power supply 30 can supply power to all units in the execution module 10.
The execution unit 12 can adopt a unit made of a control core such as MCU or PLC, a driving circuit for driving the lock 11 is arranged in the execution unit 12, and the working state of the lock 11 is controlled through the driving circuit. The execution unit 12 is further provided with a voltage acquisition circuit, the working state of the external power supply 30 is detected through the voltage acquisition circuit, if the voltage of the mobile power supply made of the lithium battery is smaller than the minimum working voltage value, the mobile power supply is powered down, and if the voltage of the mobile power supply cannot rise or cannot reach the minimum working voltage value during or after continuous charging, the mobile power supply is damaged.
The first wireless unit 13 includes a coil and a wireless power transmission circuit, and an existing wireless charging module can be used. The first wireless unit 13 can receive power wirelessly and also transmit power wirelessly. The power received by the first wireless unit 13 may power all units within the execution module 10. The first radio frequency unit 14 is connected to the coil of the first radio unit 13, and shares the coil with the first radio unit 13 to transmit or receive radio frequency signals.
As shown in fig. 2, an access switch 141 is electrically connected in series between the first rf unit 14 and the coil, and the access switch 141 may be made of a MOS transistor. The access switch 141 is electrically connected to an access resistor 142, and the access resistor 142 is electrically connected in parallel to an energy storage capacitor 143. The access switch 141 is controlled by the first radio frequency unit 14, and a CPU or an MCU is integrated in the first radio frequency unit 14. The first rf unit 14 controls the switch 141 to be normally closed, and the switch 141 is closed to short the switch-in resistor 142.
Returning to fig. 1, the control module 20 includes a control unit 21 electrically connected to a control power source 40, a second wireless unit 22, and a second radio frequency unit 23. The control power supply 40 may employ a rechargeable portable power source built into the control module 20. The control unit 21 may employ a unit made of an MCU or a PLC or the like control core. The second wireless unit 22 includes a coil and a wireless charging circuit, and the second wireless unit 22 is configured to provide wireless power to the first wireless unit 13, and may also receive the power of the first wireless unit 13. The second radio frequency unit 23 is electrically connected to a coil of the second radio unit 22, and the second radio frequency unit 23 shares the coil with the second radio unit 22 to transmit or receive radio frequency signals.
When the control module 20 is used by a worker to cooperate with the execution module 10 to control the lock 11, if the external power supply 30 supplies power normally, the first radio frequency unit 14 and the second radio frequency unit 23 communicate according to the preset data content, the second wireless unit 22 does not need to supply power to the first wireless unit 13, and the execution module 10 can work normally. If the external power supply 30 cannot supply power, the first rf unit 14 cannot respond to the data content sent by the second rf unit 23, and the second wireless unit 22 needs to supply power to the first wireless unit 13, so that the execution module 10 can function normally, and meanwhile, the first rf unit 14 and the second rf unit 23 communicate according to the preset content.
When the external power supply 30 cannot supply power, the control unit 21 controls the second wireless unit 22 to send a charging signal to the first wireless unit 13 to transmit power, the power received by the first wireless unit 13 supplies power to the execution module 10, meanwhile, the control unit 21 modulates a transmitting signal to be transmitted by the second radio frequency unit 23 into the charging signal, the transmitting signal and the charging signal are modulated to generate a wireless signal, and the second wireless unit 22 sends the wireless signal to the first wireless unit 13. After the first wireless unit 13 receives the wireless signal, the first wireless unit 13 supplies the received electric energy to the lock 11, the execution unit 12 and the first radio frequency unit 14, wherein a circuit of the electric energy supply adopts a circuit of a wireless charging scheme commonly used in the prior art, and can adopt a wireless charging scheme in the existing smart phone. When the execution unit 12 detects that the power of the external power supply 30 is low, it controls the first wireless unit 13 to use the received power to charge the external power supply 30. The first radio frequency unit 14 demodulates the transmission signal from the radio signal, and before or after the end of the transmission of the radio signal, the first radio frequency unit 14 returns a response signal by changing the reception power of the first radio unit 13. In the scheme that the first radio frequency unit 14 changes the received power of the first radio frequency unit 13, the second radio frequency unit 22 can calculate the power provided by itself without exceeding the maximum power supply of the second radio frequency unit 22, and the power provided by the second radio frequency unit 22 is related to the received power of the first radio frequency unit 13, so that the second radio frequency unit 22 can indirectly calculate the received power of the first radio frequency unit 13, thereby receiving the response signal from the first radio frequency unit 14 by recording the change of the received power of the first radio frequency unit 13.
If the execution unit 12 detects that the electric quantity variation of the external power supply 30 is lower than the preset variation value after the set time, the external power supply 30 fails, and the execution unit 12 controls the first radio frequency unit 14 to return a response signal representing the battery failure. For example, after 5 minutes of wireless charging, the voltage of the external power supply 30 is always 2v, which represents a fault of the external power supply 30. If the response signal needs to be sent after the wireless signal is transmitted, the execution unit 12 uses the residual power in the execution module 10 to send the preset state information to the second radio frequency unit 23, and the second radio frequency unit 23 sends the response signal representing the preset state information. After the wireless charging is finished, the circuit in the execution module 10 has energy storage elements such as capacitance or inductance, so that the execution module 10 cannot be immediately powered off, and the stored electric energy can enable the execution unit 12 and the first radio frequency unit 14 to continuously work for a short period of time, which can be 1 to 3 seconds, in the period of time, the power consumption of the first radio frequency unit 14 is very low, and the response signal can be completely sent to the second radio frequency unit 23.
Referring to fig. 1 and 2, when the access switch 141 is closed, the access resistor 142 and the storage capacitor 143 are not activated. The process of the first radio frequency unit 14 transmitting the reply signal by changing the received power is as follows: when the first radio frequency unit 14 sends the preset state information, the access switch 141 is controlled to be turned off, and the access switch 141 connects the access resistor 142 in series to the power receiving loop where the coil of the first radio unit 13 is located. The first rf unit 14 changes the received power by controlling the number of the access resistors 142 connected in the coil to change the impedance, and when the access resistors 142 are connected in the coil, the frequency of the signal of the wireless transmission is not affected, but only the power of the wireless transmission is affected, and when the power received by the execution unit 12 is shared by the access resistors 142, the execution unit 12 increases the received power, so that the output power of the second wireless unit 22 is increased in a controllable range. When the wireless charging is stopped, the energy storage capacitor 143 can store electric energy, and the first radio frequency unit 14 controls the release of the electric energy on the energy storage capacitor 143 by controlling the on-off of the coil, so as to send a radio signal through the coil.
The implementation process of the embodiment is as follows: when a worker patrols and examines a plurality of intelligent manhole covers, the control module 20 is used to align the execution module 10. If the execution module 10 is operating normally, the control module 20 can quickly obtain the response signal of the execution module 10 without wireless charging. If the external power supply 30 electrically connected to the execution module 10 is damaged or loses power, the control module 20 cannot obtain the response signal of the execution module 10 without wireless charging, and at this time, a worker can use the control module 20 as a key end to wirelessly supply power to the execution module 10. The second wireless unit 22 sends electric energy to the first wireless unit 13, and the electric energy received by the execution module 10 can maintain the working state of the execution module 10 and can also be used for charging the external power supply 30. At the same time of wireless charging, the first rf unit 14 may share the wireless charging coil to transmit status information representing a fault to the second rf unit 23, and the first rf unit 14 returns a response signal by changing the received power, without affecting the supply of electric power while returning data.
Embodiment two:
a locking device for an intelligent manhole cover, as shown in fig. 3, is different from the first embodiment in that: the first rf unit 14 is electrically connected with a plurality of filter capacitors 144 connected in series, and the filter capacitors 144 are electrically connected in series between the coils of the first rf unit 14 and the first wireless unit 13. Each filter capacitor 144 is electrically connected in parallel with a short-circuit switch 145, the short-circuit switch 145 is controlled by the first radio frequency unit 14, and the short-circuit switch 145 can be a MOS transistor. The filter capacitor 144 is also electrically connected in parallel with a dissipation resistor 146.
After the first rf unit 14 controls the short-circuit switch 145 to be closed, the short-circuit switch 145 will short-circuit the filter capacitor 144 and the energy-consuming resistor 146, so as to maximize the wireless charging efficiency. After the first rf unit 14 controls the short-circuit switch 145 to be turned off, the filter capacitor 144 and the energy dissipation resistor 146 are connected in series in the coil, which increases the loss, increases the wireless charging power, and realizes the change of the receiving power. The first rf unit 14 changes the reception frequency of the radio signal by changing the capacitive reactance by controlling the number of the filter capacitors 144 connected in the coil to thereby change the reception power, and can ensure the transmission quality of the radio signal by setting the capacitance value of the filter capacitors 144 to a value that does not affect the transmission of the radio signal. After the wireless transmission is finished, the energy dissipation resistor 146 can consume the electric energy remained in the filter capacitor 144 to protect components, and meanwhile, the energy on the filter capacitor 144 can be kept longer, so that the first radio frequency unit 14 can transmit radio frequency signals in a certain time.
Embodiment III:
a locking device for an intelligent manhole cover, as shown in fig. 4, is different from the second embodiment in that: the energy dissipation resistor 146 is connected in series with the filter capacitor 144, and the energy dissipation resistor 146 is electrically connected with the short-circuit switch 145 in parallel, and the short-circuit switch 145 can short-circuit the energy dissipation resistor 146 after being closed. The shorting switch 145 can vary the rate of discharge of the filter capacitor 144 by varying the number of connected energy consuming resistors 146, while also varying the received power of the execution module 10.
Embodiment four:
a locking device for an intelligent manhole cover, as shown in fig. 5, is different from the first embodiment in that: the coils of the first wireless unit 13 comprise a plurality of groups of sub-coils, the sub-coils are sequentially and electrically connected in series through a conduction switch 147, and the conduction switch 147 is controlled to be connected with the first radio frequency unit 14. The first rf unit 14 controls the on switch 147 to be closed, and the adjacent sub-coils are connected in series, and if the first rf unit 14 controls the on switch 147 to be opened, the adjacent sub-coils are opened, so that the length of the coil of the first wireless unit 13 is changed. The on switch 147 can be a MOS transistor. In the present embodiment, the first rf unit 14 can change the power receiving length of the coil of the first wireless unit 13 by changing the number of sub-coils, so as to change the transmission distance of the rf signal and the sensitivity of the received signal, and also change the wireless charging distance and the receiving efficiency, and the changed parameters affect the receiving power of the first wireless unit 13.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (5)
1. A locking device for intelligent well lid, its characterized in that: comprises an execution module (10) and a control module (20) which are matched;
the execution module (10) comprises a lockset (11) fixedly connected to the well lid and externally connected with a power supply (30), an execution unit (12) for controlling the lockset (11) and detecting the working state of the externally connected power supply (30) and a first wireless unit (13) for receiving external electric energy, wherein a coil of the first wireless unit (13) is electrically connected with a first radio frequency unit (14);
the control module (20) comprises a control unit (21) electrically connected with a control power supply (40) and a second wireless unit (22) for carrying out wireless connection with the first wireless unit (13), and a coil of the second wireless unit (22) is electrically connected with a second radio frequency unit (23);
the control unit (21) modulates a transmitting signal to be transmitted by the second radio frequency unit (23) into a charging signal for the first radio unit (13) to charge the second radio unit (22) and generates a wireless signal, and the second radio unit (22) sends the wireless signal to the first radio unit (13);
after the first wireless unit (13) receives the wireless signal, the first wireless unit (13) supplies the received electric energy to the lockset (11), the execution unit (12) and the first radio frequency unit (14), the first radio frequency unit (14) demodulates the transmission signal from the wireless signal, and after the wireless signal transmission is finished, the first radio frequency unit (14) returns a response signal by changing the receiving power of the first wireless unit (13);
said changing the received power of said first radio unit (13) to return an acknowledgement signal comprises:
the first radio frequency unit (14) is electrically connected with an access switch (141) electrically connected with the coil of the first wireless unit (13) in series, the access switch (141) is electrically connected with an access resistor (142), the access switch (141) is controlled by the first radio frequency unit (14), the access switch (141) is normally closed and short-circuits the access resistor (142), when the first radio frequency unit (14) needs to send preset state information, the access switch (141) is controlled to act, and the access resistor (142) is connected in series to a power receiving loop where the coil of the first wireless unit (13) is located by the access switch (141);
the access resistor (142) is electrically connected with an energy storage capacitor (143) in parallel, and when the first radio frequency unit (14) sends preset state information, the access switch (141) is controlled to be disconnected;
the execution unit (12) controls the first wireless unit (13) to use the received electric energy for charging the external power supply (30) if detecting that the electric quantity of the external power supply (30) is low;
after the set time, if the execution unit (12) detects that the electric quantity variation of the external power supply (30) is lower than a preset variation value, when the second wireless unit (22) stops wireless charging, the execution unit (12) controls the first radio frequency unit (14) to send preset state information to the second radio frequency unit (23) by using the residual electric energy in the execution module (10).
2. The locking device for an intelligent manhole cover according to claim 1, wherein: said changing the received power of said first radio unit (13) to return an acknowledgement signal comprises:
the first radio frequency unit (14) is electrically connected with a plurality of filter capacitors (144) which are mutually connected in series and are electrically connected with coils of the first radio unit (13) in series, and each filter capacitor (144) is electrically connected with a short-circuit switch (145) controlled by the first radio frequency unit (14) in parallel.
3. A locking device for an intelligent manhole cover according to claim 2, characterized in that: the filter capacitor (144) is electrically connected in parallel with an energy dissipation resistor (146).
4. A locking device for an intelligent manhole cover according to claim 2, characterized in that: the filter capacitor (144) is electrically connected with the energy dissipation resistor (146) in series, the energy dissipation resistor (146) is electrically connected with the short-circuit switch (145) in parallel, and the short-circuit switch (145) is closed to short-circuit the energy dissipation resistor (146).
5. The locking device for an intelligent manhole cover according to claim 1, wherein: the coil of the first wireless unit (13) comprises a plurality of groups of sub-coils which are electrically connected in series, a conduction switch (147) is electrically connected between adjacent sub-coils in series, and the working state of the conduction switch (147) is controlled to be connected with the first radio frequency unit (14).
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| CN202111476036.3A CN114233110B (en) | 2021-12-06 | 2021-12-06 | Locking device for intelligent well lid |
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