Smart meter box external lock

Abstract

The invention discloses an external lock for a smart meter box, which belongs to the technical field of external locks for smart meter boxes. The technical problem to be solved is to provide an external lock for a smart meter box. The technical scheme adopted to solve the technical problem is as follows: the lock shell is provided, a lock core and a corresponding control module are arranged inside the lock shell, a U-shaped lock rod is arranged on the top of the lock shell, one end of the U-shaped lock rod is a fixed end, and the other end of the U-shaped lock rod is a locking end, and the locking end of the U-shaped lock rod can move up and down inside the lock core; a locking switch is also arranged inside the lock core, and the locking switch is transmission-connected with a locking motor; the control module is specifically a control circuit board arranged at the bottom of the lock shell, a central controller is integrated on the control circuit board, and a signal output end of the central controller is connected with the locking motor; the central controller is also connected with a positioning module, a data storage module, and an audible and visual alarm module respectively through wires; the invention is installed and applied to the meter box.

Description

Technical Field

[0001] The invention discloses an external lock for a smart meter box, and belongs to the technical field of external locks for smart meter boxes. Background Art

[0002] For many years, ordinary locks have been used to seal the meter boxes, which has caused many problems in use and management, mainly in the following aspects:

[0003] 1. Low safety factor; ordinary locks have simple locking mechanisms and can often be opened with universal or common keys. The meter box locks are also easily opened when damaged by external forces;

[0004] 2. Easy to rust and corrode: Since ordinary locks have no moisture-proof measures, the locks are generally placed directly outside and are affected by the surrounding environment. Rain and snow can easily cause the locks to rust and corrode, making them unable to be opened;

[0005] 3. No records of opening and closing locks. Since ordinary locks do not have the functions of recording and storing opening and closing locks, there is a lack of control over the opening or closing operations of locks.

[0006] 4. The management of the meter box is chaotic. During routine maintenance, the installation location, meter position, installed meter and other information of the meter box are blank, making it impossible to achieve consistent management of accounts, cards and objects, and the management and registration efficiency is low. Summary of the invention

[0007] In order to overcome the deficiencies in the prior art, the present invention aims to solve the following technical problems: providing an external lock for a smart meter box; in order to solve the above technical problems, the present invention adopts the following technical solutions: the external lock for a smart meter box comprises a lock shell, a lock core and a corresponding control module are arranged inside the lock shell, a U-shaped lock rod is arranged on the top of the lock shell, one end of the U-shaped lock rod is a fixed end, the other end of the U-shaped lock rod is a locking end, and the locking end of the U-shaped lock rod can move up and down inside the lock core;

[0008] A locking switch is also provided inside the lock core, and the locking switch is transmission-connected to the locking motor;

[0009] The control module is specifically a control circuit board arranged at the bottom of the lock housing, the control circuit board is integrated with a central controller, and the signal output end of the central controller is connected to the locking motor;

[0010] The central controller is also connected to the positioning module, the data storage module, and the sound and light alarm module respectively through wires;

[0011] The central controller is also connected to a wireless communication module, which is connected to the monitoring terminal and the monitoring center computer via a wireless network;

[0012] The power input terminal of the central controller is connected to the power module;

[0013] The front of the lock housing is also provided with an unlocking knob and an emergency knob.

[0014] The chip used by the central controller is the control chip U1, and the circuit structure of the central controller is:

[0015] The 14th pin of the control chip U1 is connected in series with a resistor R29 and then connected to a 3.3V input power supply;

[0016] Pins 20, 21, 22 and 23 of the control chip U1 are connected to the extended memory;

[0017] Pins 41, 42 and 43 of the control chip U1 are connected to the positioning module;

[0018] The 5th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y1 and then connected to one end of the capacitor C35.

[0019] Pin 6 of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y1 and then connected to one end of the capacitor C36, and the other end of the capacitor C35 is connected in parallel to the other end of the capacitor C36 and then grounded;

[0020] The 60th pin of the control chip U1 is connected in series with a resistor R38 and then grounded;

[0021] Pin 7 of the control chip U1 is connected in parallel to one end of the capacitor C42 and one end of the resistor R37 and then connected to one end of the reset switch S1. The other end of the capacitor C42 is connected in parallel to the other end of the switch S1 and then grounded. The other end of the resistor R37 is connected to a 3.3V input power supply.

[0022] Pin 1 of the control chip U1 is connected in parallel to the cathode of the diode D5, one end of the capacitor C44 is then connected to the anode of the battery BT2, and the other end of the capacitor C44 is connected in parallel to the cathode of the battery BT2 and then grounded;

[0023] The 32nd pin of the control chip U1 is connected in parallel to the anode of the diode D5, and the 48th, 64th and 19th pins of the control chip U1 are connected to a 3.3V input power supply;

[0024] The 4th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y2 and then connected to one end of the capacitor C47.

[0025] The 3rd pin of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y2 and then connected to one end of the capacitor C45, and the other end of the capacitor C47 is connected in parallel to the other end of the capacitor C45 and then grounded;

[0026] Pins 39, 40, 51 and 52 of the control chip U1 are respectively connected to the working indicator lights;

[0027] Pins 9, 10, 11, 24, 25 and 37 of the control chip U1 are connected to the programming interface;

[0028] Pins 59, 61 and 62 of the control chip U1 are connected to the status indicator light;

[0029] Pin 58 of the control chip U1 is connected in series with a resistor R44 and then connected to the base of the transistor Q10. The emitter of the transistor Q10 is grounded. The collector of the transistor Q10 is connected to one end of the resistor R40. The other end of the resistor R40 is connected in parallel with the anode of the diode D10 and then connected to the control end of the buzzer LS1. The cathode of the diode D10 is connected in parallel with the power supply end of the buzzer LS1 and then connected to the VBAT power supply input end.

[0030] Pin 28 of the control chip U1 is connected in series with a resistor R27 and then grounded;

[0031] Pins 26 and 27 of the control chip U1 are connected to the data storage module.

[0032] The chip used by the positioning module is the positioning chip U2, and the circuit structure used by the positioning module is:

[0033] Pin 1 of the positioning chip U2 is connected in series with a resistor R14 and then connected to pin 43 of the control chip U1;

[0034] Pin 2 of the positioning chip U2 is connected in series with a resistor R15 and then connected to pin 42 of the control chip U1;

[0035] The 6th pin of the positioning chip U2 is connected in series with a resistor R16 and then connected to the 41st pin of the control chip U1;

[0036] Pin 28 of the positioning chip U2 is connected to the positive electrode of the battery BT1 and then connected to the VRTC input power supply, and the negative electrode of the battery BT1 is grounded;

[0037] Pin 32 of the positioning chip U2 is connected to the positioning antenna E1;

[0038] Pin 34 of the positioning chip U2 is connected in parallel to pin 35 of the positioning chip U2, one end of the capacitor C11 and then connected to one end of the inductor L2, the other end of the capacitor C11 is grounded, and the other end of the inductor L2 is connected to the VCC input power supply;

[0039] Pin 39 of the positioning chip U2 is connected to the collector of the transistor Q3, the base of the transistor Q3 is connected in parallel to one end of the resistor R11 and then connected to one end of the resistor R12, the other end of the resistor R11 is connected to the input power supply, and the other end of the resistor R12 is connected in parallel to the emitter of the transistor Q3 and then grounded;

[0040] Pin 41 of the positioning chip U2 is connected in series with a resistor R13 and a light emitting diode D3 and then grounded.

[0041] The chip used in the data storage module is a storage chip U3, and the circuit structure of the data storage module is:

[0042] Pins 1, 2, 3, 4 and 7 of the memory chip U3 are all grounded;

[0043] The 5th pin of the storage chip U3 is connected in parallel to one end of the resistor R18 and then connected to the 27th pin of the control chip U1;

[0044] The 6th pin of the storage chip U3 is connected in parallel to one end of the resistor R17 and then connected to the 26th pin of the control chip U1;

[0045] Pin 8 of the memory chip U3 is connected in parallel to one end of a capacitor C16, the other end of a resistor R18, and the other end of a resistor R17 are connected to a 3.3V input power supply, and the other end of the capacitor C16 is grounded.

[0046] The chips used in the power module are voltage stabilizer U4 and voltage stabilizer U5, and the circuit structure of the power module is:

[0047] Pin 1 of the voltage regulator U4 is connected in parallel to one end of the resistor R6 and then connected to the VBAT power input terminal;

[0048] Pin 2 of the voltage regulator U4 is grounded;

[0049] The 3rd pin of the voltage regulator U4 is connected to the other end of the resistor R6 and then connected to one end of the resistor R8, the other end of the resistor R8 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R2 and then connected to one end of the resistor R5, the emitter of the transistor Q2 is connected to the other end of the resistor R5 and then grounded, and the other end of the resistor R2 is connected to the input power supply;

[0050] The 4th pin of the voltage regulator U4 is connected to one end of the capacitor C8, the other end of the capacitor C8 is connected in parallel to the negative electrode of the capacitor C4, and one end of the capacitor C2 is grounded;

[0051] The 5th pin of the voltage regulator U4 is connected in parallel to the other end of the capacitor C2, the positive electrode of the polarized capacitor C4 and then connected to the 3.3V input power supply;

[0052] Pin 1 of the voltage regulator U5 is connected in parallel to pin 3 of the voltage regulator U5 and then connected to the input power supply;

[0053] Pin 2 of the voltage regulator U5 is grounded;

[0054] Pin 4 of the voltage regulator U5 is connected to one end of the capacitor C31, the other end of the capacitor C31 is connected in parallel to one end of the capacitor C26, and one end of the capacitor C24 is grounded;

[0055] Pin 5 of the voltage regulator U5 is connected in parallel to the other end of the capacitor C26, and the other end of the capacitor C24 is then connected to a 3.3V input power supply.

[0056] The chip used by the wireless communication module is the wireless communication chip U6, and the circuit structure of the wireless communication module is:

[0057] Pin 1 of the wireless communication chip U6 is connected in parallel to one end of the capacitor C87, one end of the capacitor C88, and the cathode of the diode D11, and then connected to the input power supply;

[0058] Pin 2 of the wireless communication chip U6 is connected in parallel to one end of the inductor L11 and then connected to the cathode of the diode D12. The anode of the diode D12 is connected in parallel to one end of the resistor R57 and then grounded.

[0059] Pin 3 of the wireless communication chip U6 is connected in parallel to one end of the resistor R56 and then to the other end of the resistor R57;

[0060] The other end of the resistor R56 is connected in parallel to the other end of the inductor L11, one end of the capacitor C85, and one end of the capacitor C86, and then connected to the input power supply. The other end of the capacitor C85 is connected in parallel to the other end of the capacitor C86 and then grounded.

[0061] Pins 4, 5, 6, 7 and 8 of the wireless communication chip U6 are all grounded.

[0062] The control chip U1 is specifically a NXP10 series chip; the model of the storage chip U3 is AT24C16; the model of the voltage regulator U4 is SPX3819M5, and the model of the voltage regulator U5 is SPX3819M5; the model of the wireless communication chip U6 is XL1101.

[0063] The beneficial effects of the present invention compared to the prior art are as follows: the present invention is improved on the basis of the existing meter box lock structure, and a control system and corresponding functional modules are arranged inside the lock shell, so that the improved meter box external lock has the functions of unlocking information memory, equipment information storage, external force damage alarm, corrosion protection and equipment positioning, etc., and can be widely used in the maintenance and management of meter boxes, effectively improving the level of information management of equipment use and effectively improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention will be further described below in conjunction with the accompanying drawings:

[0065] Figure 1 It is a schematic diagram of the circuit structure of the present invention;

[0066] Figure 2 It is a structural schematic diagram of the present invention;

[0067] Figure 3 is a circuit diagram of the central controller of the present invention;

[0068] Figure 4 is a circuit diagram of a positioning module of the present invention;

[0069] Figure 5 A circuit diagram of a data storage module of the present invention;

[0070] Figure 6 is a circuit diagram of a power module of the present invention;

[0071] Figure 7 is a circuit diagram of a wireless communication module of the present invention;

[0072] In the figure: 1 is a lock shell, 2 is a lock core, 3 is a U-shaped lock rod, 4 is a locking switch, 5 is a locking motor, 6 is a central controller, 7 is a positioning module, 8 is a data storage module, 9 is an audio and visual alarm module, 10 is a wireless communication module, 11 is a monitoring terminal, 12 is a monitoring center computer, 13 is a power module, 14 is an unlocking knob, and 15 is an emergency knob. DETAILED DESCRIPTION

[0073] like Figures 1 to 7 As shown, the external lock of the smart meter box of the present invention comprises a lock shell 1, a lock core 2 and a corresponding control module are arranged inside the lock shell 1, a U-shaped lock rod 3 is arranged on the top of the lock shell 1, one end of the U-shaped lock rod 3 is a fixed end, and the other end of the U-shaped lock rod 3 is a locking end, and the locking end of the U-shaped lock rod 3 can move up and down inside the lock core 2;

[0074] A locking switch 4 is also provided inside the lock core 2, and the locking switch 4 is transmission-connected to the locking motor 5;

[0075] The control module is specifically a control circuit board arranged at the bottom of the lock housing 1, on which a central controller 6 is integrated, and a signal output end of the central controller 6 is connected to the locking motor 5;

[0076] The central controller 6 is also connected to the positioning module 7, the data storage module 8, and the sound and light alarm module 9 through wires;

[0077] The central controller 6 is also connected to a wireless communication module 10, and the wireless communication module 10 is connected to a monitoring terminal 11 and a monitoring center computer 12 via a wireless network;

[0078] The power input terminal of the central controller 6 is connected to the power module 13;

[0079] The front of the lock housing 1 is also provided with an unlocking knob 14 and an emergency knob 15 .

[0080] The chip used by the central controller 6 is the control chip U1, and the circuit structure of the central controller 6 is:

[0081] The 14th pin of the control chip U1 is connected in series with a resistor R29 and then connected to a 3.3V input power supply;

[0082] Pins 20, 21, 22 and 23 of the control chip U1 are connected to the extended memory;

[0083] Pins 41, 42 and 43 of the control chip U1 are connected to the positioning module 7;

[0084] The 5th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y1 and then connected to one end of the capacitor C35.

[0085] Pin 6 of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y1 and then connected to one end of the capacitor C36, and the other end of the capacitor C35 is connected in parallel to the other end of the capacitor C36 and then grounded;

[0086] The 60th pin of the control chip U1 is connected in series with a resistor R38 and then grounded;

[0087] Pin 7 of the control chip U1 is connected in parallel to one end of the capacitor C42 and one end of the resistor R37 and then connected to one end of the reset switch S1. The other end of the capacitor C42 is connected in parallel to the other end of the switch S1 and then grounded. The other end of the resistor R37 is connected to a 3.3V input power supply.

[0088] Pin 1 of the control chip U1 is connected in parallel to the cathode of the diode D5, one end of the capacitor C44 is then connected to the anode of the battery BT2, and the other end of the capacitor C44 is connected in parallel to the cathode of the battery BT2 and then grounded;

[0089] The 32nd pin of the control chip U1 is connected in parallel to the anode of the diode D5, and the 48th, 64th and 19th pins of the control chip U1 are connected to a 3.3V input power supply;

[0090] The 4th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y2 and then connected to one end of the capacitor C47.

[0091] The 3rd pin of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y2 and then connected to one end of the capacitor C45, and the other end of the capacitor C47 is connected in parallel to the other end of the capacitor C45 and then grounded;

[0092] Pins 39, 40, 51 and 52 of the control chip U1 are respectively connected to the working indicator lights;

[0093] Pins 9, 10, 11, 24, 25 and 37 of the control chip U1 are connected to the programming interface;

[0094] Pins 59, 61 and 62 of the control chip U1 are connected to the status indicator light;

[0095] Pin 58 of the control chip U1 is connected in series with a resistor R44 and then connected to the base of the transistor Q10. The emitter of the transistor Q10 is grounded. The collector of the transistor Q10 is connected to one end of the resistor R40. The other end of the resistor R40 is connected in parallel with the anode of the diode D10 and then connected to the control end of the buzzer LS1. The cathode of the diode D10 is connected in parallel with the power supply end of the buzzer LS1 and then connected to the VBAT power supply input end.

[0096] Pin 28 of the control chip U1 is connected in series with a resistor R27 and then grounded;

[0097] Pins 26 and 27 of the control chip U1 are connected to the data storage module 8 .

[0098] The chip used by the positioning module 7 is the positioning chip U2, and the circuit structure used by the positioning module 7 is:

[0099] Pin 1 of the positioning chip U2 is connected in series with a resistor R14 and then connected to pin 43 of the control chip U1;

[0100] Pin 2 of the positioning chip U2 is connected in series with a resistor R15 and then connected to pin 42 of the control chip U1;

[0101] The 6th pin of the positioning chip U2 is connected in series with a resistor R16 and then connected to the 41st pin of the control chip U1;

[0102] Pin 28 of the positioning chip U2 is connected to the positive electrode of the battery BT1 and then connected to the VRTC input power supply, and the negative electrode of the battery BT1 is grounded;

[0103] Pin 32 of the positioning chip U2 is connected to the positioning antenna E1;

[0104] Pin 34 of the positioning chip U2 is connected in parallel to pin 35 of the positioning chip U2, one end of the capacitor C11 and then connected to one end of the inductor L2, the other end of the capacitor C11 is grounded, and the other end of the inductor L2 is connected to the VCC input power supply;

[0105] Pin 39 of the positioning chip U2 is connected to the collector of the transistor Q3, the base of the transistor Q3 is connected in parallel to one end of the resistor R11 and then connected to one end of the resistor R12, the other end of the resistor R11 is connected to the input power supply, and the other end of the resistor R12 is connected in parallel to the emitter of the transistor Q3 and then grounded;

[0106] Pin 41 of the positioning chip U2 is connected in series with a resistor R13 and a light emitting diode D3 and then grounded.

[0107] The chip used in the data storage module 8 is a storage chip U3, and the circuit structure of the data storage module 8 is:

[0108] Pins 1, 2, 3, 4 and 7 of the memory chip U3 are all grounded;

[0109] The 5th pin of the storage chip U3 is connected in parallel to one end of the resistor R18 and then connected to the 27th pin of the control chip U1;

[0110] The 6th pin of the storage chip U3 is connected in parallel to one end of the resistor R17 and then connected to the 26th pin of the control chip U1;

[0111] Pin 8 of the memory chip U3 is connected in parallel to one end of a capacitor C16, the other end of a resistor R18, and the other end of a resistor R17 are connected to a 3.3V input power supply, and the other end of the capacitor C16 is grounded.

[0112] The chips used in the power module 13 are the voltage stabilizer U4 and the voltage stabilizer U5. The circuit structure of the power module 13 is as follows:

[0113] Pin 1 of the voltage regulator U4 is connected in parallel to one end of the resistor R6 and then connected to the VBAT power input terminal;

[0114] Pin 2 of the voltage regulator U4 is grounded;

[0115] The 3rd pin of the voltage regulator U4 is connected to the other end of the resistor R6 and then connected to one end of the resistor R8, the other end of the resistor R8 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R2 and then connected to one end of the resistor R5, the emitter of the transistor Q2 is connected to the other end of the resistor R5 and then grounded, and the other end of the resistor R2 is connected to the input power supply;

[0116] The 4th pin of the voltage regulator U4 is connected to one end of the capacitor C8, the other end of the capacitor C8 is connected in parallel to the negative electrode of the capacitor C4, and one end of the capacitor C2 is grounded;

[0117] The 5th pin of the voltage regulator U4 is connected in parallel to the other end of the capacitor C2, the positive electrode of the polarized capacitor C4 and then connected to the 3.3V input power supply;

[0118] Pin 1 of the voltage regulator U5 is connected in parallel to pin 3 of the voltage regulator U5 and then connected to the input power supply;

[0119] Pin 2 of the voltage regulator U5 is grounded;

[0120] Pin 4 of the voltage regulator U5 is connected to one end of the capacitor C31, the other end of the capacitor C31 is connected in parallel to one end of the capacitor C26, and one end of the capacitor C24 is grounded;

[0121] Pin 5 of the voltage regulator U5 is connected in parallel to the other end of the capacitor C26, and the other end of the capacitor C24 is then connected to a 3.3V input power supply.

[0122] The chip used by the wireless communication module 10 is a wireless communication chip U6, and the circuit structure of the wireless communication module 10 is:

[0123] Pin 1 of the wireless communication chip U6 is connected in parallel to one end of the capacitor C87, one end of the capacitor C88, and the cathode of the diode D11, and then connected to the input power supply;

[0124] Pin 2 of the wireless communication chip U6 is connected in parallel to one end of the inductor L11 and then connected to the cathode of the diode D12. The anode of the diode D12 is connected in parallel to one end of the resistor R57 and then grounded.

[0125] Pin 3 of the wireless communication chip U6 is connected in parallel to one end of the resistor R56 and then to the other end of the resistor R57;

[0126] The other end of the resistor R56 is connected in parallel to the other end of the inductor L11, one end of the capacitor C85, and one end of the capacitor C86, and then connected to the input power supply. The other end of the capacitor C85 is connected in parallel to the other end of the capacitor C86 and then grounded.

[0127] Pins 4, 5, 6, 7 and 8 of the wireless communication chip U6 are all grounded.

[0128] The control chip U1 is specifically a NXP10 series chip; the model of the storage chip U3 is AT24C16; the model of the voltage regulator U4 is SPX3819M5, and the model of the voltage regulator U5 is SPX3819M5; the model of the wireless communication chip U6 is XL1101.

[0129] The present invention adopts NFC, GPS positioning, information storage and other technologies, and has the functions of unlocking and locking information memory, equipment information storage, external force damage alarm, corrosion protection and equipment positioning, etc. It can be widely installed and applied to the unlocking and locking management of meter boxes, effectively solves the chaotic situation of on-site equipment management, standardizes the management of meter boxes, effectively improves the information level of equipment management and operation and maintenance, and effectively improves work efficiency; the beneficial effects are reflected in the following aspects:

[0130] 1. Security: Compared with ordinary locks, the present invention adopts Bluetooth, NFC, and GPRS wireless communication technologies, and only supports unlocking by key. Except for external force damage, the lock cannot be opened by the configured key, which is more secure;

[0131] 2. Information storage and memory: The present invention provides corresponding data storage modules to enable it to have functions such as unlocking memory storage, equipment information storage, coordinate positioning, etc., so as to realize the standardization of meter box information management;

[0132] 3. External force damage alarm: The present invention provides an alarm function by setting an audible and visual alarm module. When the external lock is forced to open or damaged by external force, the controller can control the corresponding module to emit an alarm sound, and at the same time transmit the alarm signal to the corresponding monitoring terminal through the communication module, which plays a certain warning role.

[0133] The external lock provided by the present invention is installed at the hinge of the cover of the meter box, which is generally a mechanism for padlocking, ensuring that the U-shaped lock rod can be hung on it to lock the box cover; after installation, the external lock is required to achieve the following functions: a set of identity recognition lock control system is arranged inside the external lock of the meter box, the external lock is hung on the closed meter box cover and locked, at this time, the external lock is in a locked state, and any external force or key cannot open it; when the maintenance personnel perform routine maintenance on the meter box, first use the monitoring terminal to be paired to establish a connection with the communication module of the external lock, after the connection is established, the monitoring terminal will automatically download the pairing data, prompt the operator to enter the corresponding identity verification information, the information after the operator enters will be uploaded to the server of the monitoring center through the wireless communication module, the server will verify the identity information of the preset staff, and after the verification is correct, the unlocking signal will be fed back to the central controller of the external lock, at this time the central controller will control the locking motor to act, release the locked state of the locking switch, at this time the U-shaped lock rod will automatically pop out, and the external lock will open;

[0134] The lock housing provided by the present invention has a built-in power module, which is usually a packaged lithium battery, and can be charged by setting a power port on the side wall of the lock housing to ensure the normal operation of the internal control communication module;

[0135] In order to improve the applicability of the present invention, an unlocking knob and an emergency knob are also provided on the front side of the lock shell. The unlocking knob is specifically an unlocking and locking status indication module. When the remote terminal issues an unlocking command, the knob is in an open state, and the lock can be unlocked by manually rotating the knob; when the remote terminal issues a locking command, the knob is locked, and the knob cannot be rotated and the lock cannot be opened. When an emergency occurs, the lock can be opened from the inside of the lock by turning on the emergency knob.

[0136] The front of the lock housing is also provided with a working indicator light and an alarm indicator light. The working indicator light is used to display the current state of the lock. During the information proofreading process, the indicator light flashes to indicate that the acquisition positioning and communication are normal.

[0137] During the maintenance process, the central controller will record the opening and closing actions of the meter box cover. When summarizing the day's work, the staff can determine the work location through the positioning module set by the external lock. At the same time, the detailed parameters of the meter box repaired that day can be queried in the monitoring terminal, effectively improving the management efficiency of the meter box.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. External lock of smart meter box, characterized by: The lock shell (1) comprises a lock core (2) and a corresponding control module arranged inside the lock shell (1); a U-shaped lock rod (3) is arranged on the top of the lock shell (1); one end of the U-shaped lock rod (3) is a fixed end, and the other end of the U-shaped lock rod (3) is a locking end; the locking end of the U-shaped lock rod (3) can move up and down inside the lock core (2); A locking switch (4) is also provided inside the lock core (2), and the locking switch (4) is drivingly connected to the locking motor (5); The control module is specifically a control circuit board arranged at the bottom of the lock housing (1), the control circuit board is integrated with a central controller (6), and the signal output end of the central controller (6) is connected to the locking motor (5); The central controller (6) is also connected to the positioning module (7), the data storage module (8), and the sound and light alarm module (9) respectively through wires; The central controller (6) is also connected to a wireless communication module (10), and the wireless communication module (10) is connected to a monitoring terminal (11) and a monitoring center computer (12) via a wireless network; The power input terminal of the central controller (6) is connected to the power module (13); An unlocking knob (14) and an emergency knob (15) are also provided on the front side of the lock housing (1).

2. The external lock of the smart meter box according to claim 1 is characterized in that: The chip used by the central controller (6) is a control chip U1, and the circuit structure of the central controller (6) is as follows: The 14th pin of the control chip U1 is connected in series with a resistor R29 and then connected to a 3.3V input power supply; Pins 20, 21, 22 and 23 of the control chip U1 are connected to the extended memory; Pins 41, 42 and 43 of the control chip U1 are connected to the positioning module (7); The 5th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y1 and then connected to one end of the capacitor C35. Pin 6 of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y1 and then connected to one end of the capacitor C36, and the other end of the capacitor C35 is connected in parallel to the other end of the capacitor C36 and then grounded; The 60th pin of the control chip U1 is connected in series with a resistor R38 and then grounded; Pin 7 of the control chip U1 is connected in parallel to one end of the capacitor C42 and one end of the resistor R37 and then connected to one end of the reset switch S1. The other end of the capacitor C42 is connected in parallel to the other end of the switch S1 and then grounded. The other end of the resistor R37 is connected to a 3.3V input power supply. Pin 1 of the control chip U1 is connected in parallel to the cathode of the diode D5, one end of the capacitor C44 is then connected to the anode of the battery BT2, and the other end of the capacitor C44 is connected in parallel to the cathode of the battery BT2 and then grounded; The 32nd pin of the control chip U1 is connected in parallel to the anode of the diode D5, and the 48th, 64th and 19th pins of the control chip U1 are connected to a 3.3V input power supply; The 4th pin of the control chip U1 is connected in parallel to one end of the crystal oscillator Y2 and then connected to one end of the capacitor C47. The 3rd pin of the control chip U1 is connected in parallel to the other end of the crystal oscillator Y2 and then connected to one end of the capacitor C45, and the other end of the capacitor C47 is connected in parallel to the other end of the capacitor C45 and then grounded; Pins 39, 40, 51 and 52 of the control chip U1 are respectively connected to the working indicator lights; Pins 9, 10, 11, 24, 25 and 37 of the control chip U1 are connected to the programming interface; Pins 59, 61 and 62 of the control chip U1 are connected to the status indicator light; Pin 58 of the control chip U1 is connected in series with a resistor R44 and then connected to the base of the transistor Q10. The emitter of the transistor Q10 is grounded. The collector of the transistor Q10 is connected to one end of the resistor R40. The other end of the resistor R40 is connected in parallel with the anode of the diode D10 and then connected to the control end of the buzzer LS1. The cathode of the diode D10 is connected in parallel with the power supply end of the buzzer LS1 and then connected to the VBAT power supply input end. Pin 28 of the control chip U1 is connected in series with a resistor R27 and then grounded; Pins 26 and 27 of the control chip U1 are connected to the data storage module (8).

3. The external lock of the smart meter box according to claim 2 is characterized in that: The chip used by the positioning module (7) is the positioning chip U2, and the circuit structure used by the positioning module (7) is: Pin 1 of the positioning chip U2 is connected in series with a resistor R14 and then connected to pin 43 of the control chip U1; Pin 2 of the positioning chip U2 is connected in series with a resistor R15 and then connected to pin 42 of the control chip U1; The 6th pin of the positioning chip U2 is connected in series with a resistor R16 and then connected to the 41st pin of the control chip U1; Pin 28 of the positioning chip U2 is connected to the positive electrode of the battery BT1 and then connected to the VRTC input power supply, and the negative electrode of the battery BT1 is grounded; Pin 32 of the positioning chip U2 is connected to the positioning antenna E1; Pin 34 of the positioning chip U2 is connected in parallel to pin 35 of the positioning chip U2, one end of the capacitor C11 and then connected to one end of the inductor L2, the other end of the capacitor C11 is grounded, and the other end of the inductor L2 is connected to the VCC input power supply; Pin 39 of the positioning chip U2 is connected to the collector of the transistor Q3, the base of the transistor Q3 is connected in parallel to one end of the resistor R11 and then connected to one end of the resistor R12, the other end of the resistor R11 is connected to the input power supply, and the other end of the resistor R12 is connected in parallel to the emitter of the transistor Q3 and then grounded; Pin 41 of the positioning chip U2 is connected in series with a resistor R13 and a light emitting diode D3 and then grounded.

4. The external lock of the smart meter box according to claim 3 is characterized by: The chip used in the data storage module (8) is a storage chip U3, and the circuit structure of the data storage module (8) is as follows: Pins 1, 2, 3, 4 and 7 of the memory chip U3 are all grounded; The 5th pin of the storage chip U3 is connected in parallel to one end of the resistor R18 and then connected to the 27th pin of the control chip U1; The 6th pin of the storage chip U3 is connected in parallel to one end of the resistor R17 and then connected to the 26th pin of the control chip U1; Pin 8 of the memory chip U3 is connected in parallel to one end of a capacitor C16, the other end of a resistor R18, and the other end of a resistor R17 are connected to a 3.3V input power supply, and the other end of the capacitor C16 is grounded.

5. The external lock of the smart meter box according to claim 4 is characterized in that: The chips used in the power module (13) are the voltage stabilizer U4 and the voltage stabilizer U5. The circuit structure of the power module (13) is as follows: Pin 1 of the voltage regulator U4 is connected in parallel to one end of the resistor R6 and then connected to the VBAT power input terminal; Pin 2 of the voltage regulator U4 is grounded; The 3rd pin of the voltage regulator U4 is connected to the other end of the resistor R6 and then connected to one end of the resistor R8, the other end of the resistor R8 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R2 and then connected to one end of the resistor R5, the emitter of the transistor Q2 is connected to the other end of the resistor R5 and then grounded, and the other end of the resistor R2 is connected to the input power supply; The 4th pin of the voltage regulator U4 is connected to one end of the capacitor C8, the other end of the capacitor C8 is connected in parallel to the negative electrode of the capacitor C4, and one end of the capacitor C2 is grounded; The 5th pin of the voltage regulator U4 is connected in parallel to the other end of the capacitor C2, the positive electrode of the polarized capacitor C4 and then connected to the 3.3V input power supply; Pin 1 of the voltage regulator U5 is connected in parallel to pin 3 of the voltage regulator U5 and then connected to the input power supply; Pin 2 of the voltage regulator U5 is grounded; Pin 4 of the voltage regulator U5 is connected to one end of the capacitor C31, the other end of the capacitor C31 is connected in parallel to one end of the capacitor C26, and one end of the capacitor C24 is grounded; Pin 5 of the voltage regulator U5 is connected in parallel to the other end of the capacitor C26, and the other end of the capacitor C24 is then connected to a 3.3V input power supply.

6. The external lock of the smart meter box according to claim 5 is characterized by: The chip used in the wireless communication module (10) is a wireless communication chip U6. The circuit structure of the wireless communication module (10) is as follows: Pin 1 of the wireless communication chip U6 is connected in parallel to one end of the capacitor C87, one end of the capacitor C88, and the cathode of the diode D11, and then connected to the input power supply; Pin 2 of the wireless communication chip U6 is connected in parallel to one end of the inductor L11 and then connected to the cathode of the diode D12. The anode of the diode D12 is connected in parallel to one end of the resistor R57 and then grounded. Pin 3 of the wireless communication chip U6 is connected in parallel to one end of the resistor R56 and then to the other end of the resistor R57; The other end of the resistor R56 is connected in parallel to the other end of the inductor L11, one end of the capacitor C85, and one end of the capacitor C86, and then connected to the input power supply. The other end of the capacitor C85 is connected in parallel to the other end of the capacitor C86 and then grounded. Pins 4, 5, 6, 7 and 8 of the wireless communication chip U6 are all grounded.

7. The external lock of the smart meter box according to claim 6 is characterized by: The control chip U1 is specifically a NXP10 series chip; the model of the storage chip U3 is AT24C16; the model of the voltage regulator U4 is SPX3819M5, and the model of the voltage regulator U5 is SPX3819M5; the model of the wireless communication chip U6 is XL1101.

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