CN114241638A - Positioning safety protection instrument applied to electric meter box - Google Patents
Positioning safety protection instrument applied to electric meter box Download PDFInfo
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- CN114241638A CN114241638A CN202111573598.XA CN202111573598A CN114241638A CN 114241638 A CN114241638 A CN 114241638A CN 202111573598 A CN202111573598 A CN 202111573598A CN 114241638 A CN114241638 A CN 114241638A
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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
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/25—Arrangements for indicating or signalling faults
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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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- 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
- G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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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
- G07C2009/00968—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys shape of the data carrier
- G07C2009/00976—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys shape of the data carrier card
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention relates to a positioning safety protection instrument applied to an electric meter box, which comprises an electromagnetic lock arranged on the electric meter box, a power supply device, a main control device, a positioning communication device, an electromagnetic lock detection control device and a door opening identification communication device, wherein the electromagnetic lock is arranged on the electric meter box; the power supply device is respectively electrically connected with the master control device and the positioning communication device, the master control device is respectively electrically connected with the positioning communication device, the electromagnetic lock detection control device and the door opening identification communication device, the electromagnetic lock detection control device is electrically connected with the electromagnetic lock, the positioning communication device is in communication connection with an external server, and the door opening identification communication device is in communication connection with an external door opening signal sending device. The invention can report the position of the electric meter box and the door opening event in real time on the basis of realizing the opening control and the safety protection of the electric meter box by utilizing the electromagnetic lock, has the capability of real-time positioning and real-time protection, and is convenient for post maintenance and treatment.
Description
Technical Field
The invention relates to the field of electric meter box corollary equipment, in particular to a positioning safety protection instrument applied to an electric meter box.
Background
Generally, an electric meter box used outdoors needs to be provided with a safety protection system to avoid the situation that the electric meter box can be damaged or changed. Traditional safety device uses the tool to lock structure to carry out safety protection usually, and the function is single, when ammeter case suffered powerful destruction, lacks the ability of real-time location and real-time protection, also can't satisfy the demand of afterwards maintaining and handling simultaneously.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a positioning safety protection instrument applied to an electric meter box, which can report the position and the door opening event of the electric meter box in real time on the basis of realizing the opening control and safety protection of the electric meter box by utilizing an electromagnetic lock, has the capabilities of real-time positioning and real-time protection, and is convenient for post-event maintenance and treatment.
The technical scheme for solving the technical problems is as follows:
a positioning safety protection instrument applied to an electric meter box comprises an electromagnetic lock arranged on the electric meter box, a power supply device, a main control device, a positioning communication device, an electromagnetic lock detection control device and a door opening identification communication device;
the power supply device is respectively electrically connected with the master control device and the positioning communication device, the master control device is respectively electrically connected with the positioning communication device, the electromagnetic lock detection control device and the door opening identification communication device, the electromagnetic lock detection control device is electrically connected with the electromagnetic lock, the positioning communication device is in communication connection with an external server, and the door opening identification communication device is in communication connection with an external door opening signal sending device.
The invention has the beneficial effects that: the power supply device is used for directly supplying power to the main control device and the positioning communication device respectively, and then the main control device is used for indirectly supplying power to the electromagnetic lock detection control device and the door opening identification communication device respectively, so that the normal operation of each module in the positioning safety protection instrument is realized; the positioning communication device is used for acquiring the real-time position of the electric meter box and uploading the acquired real-time position to an external server to realize real-time positioning and reporting; the electromagnetic lock detection control device is used for performing drive control on an electromagnetic lock installed on the electric meter box according to a control instruction of the main control device, and is also used for detecting the switching state of the electromagnetic lock in real time to realize intelligent opening and state detection of the electric meter box; the positioning communication device is also used for uploading the switch state detected in real time to an external server to realize the report of the door opening event; the door opening identification communication device is in communication connection with an external signal sending device (such as a smart phone), can receive a door opening signal, and is convenient for the main control device to send a control instruction for opening the electromagnetic lock to the electromagnetic lock detection control device, so that the opening control of the electromagnetic lock is realized;
according to the positioning safety protection instrument applied to the electric meter box, on one hand, the electromagnetic lock is subjected to driving control and state detection by utilizing the main control device, the door opening identification communication device and the electromagnetic lock detection control device, so that the intelligent opening of the intelligent electric meter box is realized, the safety protection performance of the intelligent electric meter box is improved, the real-time reporting of a door opening event can also be realized, and the maintenance and management of the intelligent electric meter box are facilitated; on the other hand, the position of the electric meter box can be reported in real time by utilizing the main control device and the positioning communication device, so that the real-time positioning and real-time protection capabilities are realized, and the post-event maintenance and processing of the intelligent electric meter box are further facilitated; and then be favorable to reducing the outdoor use spoilage of ammeter case, reduce manual operation's frequency, reduce personal safety danger, greatly reduced electric power enterprise's maintenance cost.
On the basis of the technical scheme, the invention also has the following improvements:
further: the power supply device comprises a power supply, a first voltage reduction circuit, a second voltage reduction circuit and a third voltage reduction circuit;
the power supply is electrically connected with the main control device sequentially through the first voltage reduction circuit and the second voltage reduction circuit, and the power supply is electrically connected with the positioning communication device sequentially through the first voltage reduction circuit and the third voltage reduction circuit.
Further: the power supply device further comprises a voltage division circuit, and the power supply is electrically connected with the main control device through the voltage division circuit.
Further: the electromagnetic lock detection control device comprises an electromagnetic lock driving circuit and an electromagnetic lock state detection circuit;
the electromagnetic lock driving circuit and the electromagnetic lock state detection circuit are electrically connected with the master control device.
Further: the electromagnetic lock driving circuit comprises a MOS transistor Q3, a triode Q5, a resistor R29, a resistor R31, a resistor R33, a resistor R35 and a diode D3;
the grid electrode of the MOS tube Q3 is electrically connected with the collector electrode of the triode Q5 through the resistor R31, the source electrode of the MOS tube Q3 is connected with a 12V direct-current power supply through the diode D3, the source electrode of the MOS tube Q3 is also electrically connected with the main control device, and the drain electrode of the MOS tube Q3 is grounded; the collector of the triode Q5 is also connected with a 12V direct-current power supply through the resistor R29, the base of the triode Q5 is electrically connected with the main control device through the resistor R33, the emitter of the triode Q5 is grounded, one end of the resistor R35 is connected with the base of the triode Q5 and the common end of the resistor R33, and the other end of the resistor R35 is grounded.
Further: the electromagnetic lock state detection circuit comprises a triode Q1, a resistor R25, a resistor R27, a TVS tube TVS8 and a capacitor C75;
the base of triode Q1 passes through resistance R27 with the master control device electricity is connected, triode Q1's collecting electrode passes through resistance R25 with the master control device electricity is connected, triode Q1's collecting electrode still direct with the master control device electricity is connected, triode Q1's projecting pole direct with the master control device electricity is connected, TVS pipe TVS 8's one end with electric capacity C75's one end is all connected triode Q1's collecting electrode with on master control device's the common port, TVS pipe TVS 8's the other end with electric capacity C75's the other end all ground connection.
Further: the positioning safety protection instrument further comprises an identity ID card arranged on the electric meter box, and the door opening identification communication device comprises a Bluetooth communication circuit and an identity identification circuit;
the Bluetooth communication circuit is in communication connection with an external door opening signal sending device, the identity recognition circuit is in communication connection with the identity ID card, and the Bluetooth communication circuit and the identity recognition circuit are both electrically connected with the master control device.
Further: the identity recognition circuit specifically comprises an encryption chip with the model of THK88-2 and a card reader with the model of ICM 522;
the card reader is in communication connection with the ID card, and the card reader and the encryption chip are both electrically connected with the main control device.
Further: the positioning safety protection instrument further comprises a backup power supply device, and the backup power supply device is respectively electrically connected with the main control device and the positioning communication device.
Further: the backup power supply device comprises a lithium battery, a battery monitoring circuit, a charging control circuit, a battery charging circuit, a battery discharging circuit and a discharging control circuit;
the lithium battery is respectively connected with the battery monitoring circuit, the battery charging circuit, the battery discharging circuit and the discharging control circuit, the battery monitoring circuit is electrically connected with the main control device, the charging control circuit is respectively connected with the battery charging circuit and the main control device, the battery discharging circuit is respectively connected with the discharging control circuit, the main control device and the positioning communication circuit, and the discharging control circuit is electrically connected with the main control device.
Further: the master control device is specifically an MCU of STM32F103C68T6 model.
Further: the positioning communication device is specifically a 4G communication module integrated with a GPS unit.
Drawings
Fig. 1 is a schematic structural diagram of a positioning safety protection instrument applied to an electric meter box in an embodiment of the invention;
FIG. 2 is a circuit diagram of a master control device according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a positioning communication device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a power supply apparatus according to an embodiment of the present invention;
fig. 5, 6 and 7 are circuit design diagrams of a first voltage-reducing circuit, a second voltage-reducing circuit and a third voltage-reducing circuit, respectively, according to an embodiment of the present invention;
FIG. 8 is a circuit diagram of a voltage divider circuit according to an embodiment of the present invention;
FIGS. 9-1 and 9-2 are circuit diagrams of two electromagnetic lock driving circuits according to embodiments of the present invention;
FIGS. 10-1 and 10-2 are circuit diagrams of two electromagnetic lock status detection circuits according to embodiments of the present invention;
FIG. 11 is a circuit diagram of a Bluetooth communication circuit according to an embodiment of the present invention;
FIG. 12-1 is a circuit diagram of an encryption chip in the identity recognition circuit according to an embodiment of the present invention;
FIG. 12-2 is a circuit diagram of the present invention between the external SPI interface of the cryptographic chip and the MCU;
FIG. 13 is a schematic structural diagram of a backup power device according to an embodiment of the present invention;
fig. 14 is a circuit diagram of a battery interface corresponding to a lithium battery in an embodiment of the present invention;
FIG. 15 is a circuit diagram of a battery monitor circuit according to an embodiment of the present invention;
FIG. 16 is a circuit diagram of a charge control circuit according to an embodiment of the present invention;
FIG. 17 is a circuit diagram of a battery charging circuit according to an embodiment of the present invention;
FIG. 18 is a circuit diagram of a battery discharge circuit according to an embodiment of the present invention;
fig. 19 is a circuit diagram of a discharge control circuit according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The present invention will be described with reference to the accompanying drawings.
In the embodiment, as shown in fig. 1, a positioning safety protection instrument applied to an electric meter box comprises an electromagnetic lock installed on the electric meter box, a power supply device, a main control device, a positioning communication device, an electromagnetic lock detection control device and a door opening identification communication device;
the power supply device is respectively electrically connected with the master control device and the positioning communication device, the master control device is respectively electrically connected with the positioning communication device, the electromagnetic lock detection control device and the door opening identification communication device, the electromagnetic lock detection control device is electrically connected with the electromagnetic lock, the positioning communication device is in communication connection with an external server, and the door opening identification communication device is in communication connection with an external door opening signal sending device.
The working principle of the positioning safety protection instrument of the embodiment is as follows:
the power supply device is used for directly supplying power to the main control device and the positioning communication device respectively, and then the main control device is used for indirectly supplying power to the electromagnetic lock detection control device and the door opening identification communication device respectively, so that the normal operation of each module in the positioning safety protection instrument is realized; the positioning communication device is used for acquiring the real-time position of the electric meter box and uploading the acquired real-time position to an external server to realize real-time positioning and reporting; the electromagnetic lock detection control device is used for performing drive control on an electromagnetic lock installed on the electric meter box according to a control instruction of the main control device, and is also used for detecting the switching state of the electromagnetic lock in real time to realize intelligent opening and state detection of the electric meter box; the positioning communication device is also used for uploading the switch state detected in real time to an external server to realize the report of the door opening event; the door opening identification communication device is in communication connection with an external signal sending device (such as a smart phone), can receive a door opening signal, is convenient for the main control device to send a control instruction for opening the electromagnetic lock to the electromagnetic lock detection control device, and further is convenient for realizing the opening control of the electromagnetic lock.
According to the positioning safety protection instrument applied to the electric meter box, on one hand, the electromagnetic lock is subjected to driving control and state detection by utilizing the main control device, the door opening identification communication device and the electromagnetic lock detection control device, so that intelligent opening of the intelligent electric meter box is realized, the safety protection performance of the intelligent electric meter box is improved, a door opening event can be reported in real time, and the maintenance and management of the intelligent electric meter box are facilitated; on the other hand, the position of the electric meter box can be reported in real time by utilizing the main control device and the positioning communication device, so that the real-time positioning and real-time protection capabilities are realized, and the post-event maintenance and processing of the intelligent electric meter box are further facilitated; and then be favorable to reducing the outdoor use spoilage of ammeter case, reduce manual operation's frequency, reduce personal safety danger, greatly reduced electric power enterprise's maintenance cost.
Specifically, in this embodiment, the master control apparatus is specifically an MCU of model STM32F103C68T6, and a circuit design diagram of the MCU is shown in fig. 2.
In particular, the positioning communication device is a 4G communication module integrated with a GPS unit. In this embodiment, a 4G communication module of EC20CEFILG model is selected, and a specific circuit design diagram of the 4G communication module is shown in fig. 3. In fig. 3, the module integrates a GPS interface and a radio frequency circuit, and only needs to connect a GPS antenna, and can complete uploading of real-time location information by calling an instruction through software. Meanwhile, the 4G communication module provides a communication state indicating interface, an LED is connected to a designated pin, and different states are distinguished through the speed of flashing. The LED slow flashing state 1(200ms on/1800 ms off) refers to a network searching state, the LED slow flashing state 2(1800ms on/200 ms off) refers to a standby state, and the LED flash state (125ms on/125 ms off) refers to a data transmission mode.
Preferably, as shown in fig. 4, the power supply device includes a power supply, a first voltage-dropping circuit, a second voltage-dropping circuit, and a third voltage-dropping circuit;
the power supply is electrically connected with the main control device sequentially through the first voltage reduction circuit and the second voltage reduction circuit, and the power supply is electrically connected with the positioning communication device sequentially through the first voltage reduction circuit and the third voltage reduction circuit.
The power supply is specifically a 12V voltage source, 12V can be converted into 5V through the first voltage reduction circuit, and 5V can be converted into 3.3V again through the second voltage reduction circuit, so that the working voltage required by the main control device, the later-stage electromagnetic lock detection control device and the door opening identification communication device is facilitated; also can convert 5V into 3.3V through third step-down circuit, obtain the required operating voltage of location communication device, the independent power supply of master control set and location communication device is passed through to this embodiment, can realize the real-time location and the safety protection of intelligent ammeter case better.
Specifically, specific circuit design diagrams of the first voltage-reducing circuit, the second voltage-reducing circuit and the third voltage-reducing circuit in the present embodiment are respectively shown in fig. 5 to 7.
In fig. 5, a switching power supply chip of an SGM6132YPS8G model is selected as the first voltage reduction circuit, the voltage of a source terminal DC12V is reduced to DC5V, C2, C3 and C4 are all input filter capacitors, the input filter capacitors are used for filtering input voltage to prevent transient large voltage, the voltage of the capacitors should be at least 1.25 times of the input voltage, and a ceramic capacitor of 105/50V is adopted in this embodiment. The parameters of R4 and R5 determine the size of the output voltage, C7, C8, C9 and C10 are output filter capacitors, and C6 and R6 are loop compensation, so that the stability of the power supply is improved. When the input voltage, the output voltage and the load current are fixed, the output direct current ripple can be minimized by selecting a proper output inductor, and the output inductor L1 of 4.7uH can be selected after table look-up. When the output voltage and the output inductance are determined, the size of the output filter capacitor is determined, in the embodiment, 22uF/16V electrolytic capacitors are used for C7, C8 and C9, and 104/50 ceramic capacitors are used for C10.
In fig. 6, the second voltage-reducing circuit is a high-efficiency linear voltage-stabilizing chip AMS1117, and CD1, C12, C13, C14, C15, C16, C16, C17, C18, C19, C20, C21 and C22 are input capacitors, which can prevent voltage inversion after power failure, thereby preventing the chip from being damaged; the specification of each electronic component in the second voltage-reducing circuit is shown in fig. 6, and is not described herein again.
In fig. 7, considering that the instantaneous peak current of the 4G module may reach 2.0A at most in the EGSM900 mode, and the power supply needs to be able to provide at least 2.0A current to prevent the voltage from dropping below 3.3V, the third voltage-reducing circuit of this embodiment uses a switching power supply chip SY8120B1ABC to output a 3.3V power supply voltage, where C40, C41, C42, C43, C44, and C45 are input filter capacitors, parameters of R11 and R13 determine the magnitude of the output voltage, C31, C32, C33, C34, C35, C36, C37, C38, C26, C27, and C28 are output filter capacitors, and R10 and R12 are chip enable voltage-dividing resistors, so that the switching power supply chip SY8120B1ABC can operate; the specification of each electronic component in the third voltage-reducing circuit is shown in fig. 7, and is not described herein again.
Preferably, as shown in fig. 4, the power supply device further includes a voltage dividing circuit, and the power supply is further electrically connected to the main control device through the voltage dividing circuit.
The voltage of the source end is divided through the voltage dividing circuit, the divided voltage is connected into the main control device, whether a power failure event occurs or not is judged by judging the high and low levels conveniently, the reporting of the power failure event can be realized by utilizing the positioning communication module, and the maintenance and management of the intelligent ammeter box are perfected.
Specifically, as shown in fig. 8, the voltage dividing circuit includes a resistor R7, a resistor R8, a resistor R9, and a capacitor C11;
the power supply sequentially passes through the resistor R7 and the resistor R8 and is electrically connected with the main control device, one end of the resistor R9 is connected to the common end of the resistor R7 and the resistor R8, the other end of the resistor R9 is grounded, one end of the capacitor C11 is connected to the common end of the resistor R8 and the main control device, and the other end of the capacitor C11 is grounded.
The specification of each electronic component in the voltage divider circuit is shown in fig. 8, and is not described herein again.
Preferably, the electromagnetic lock detection control device comprises an electromagnetic lock driving circuit and an electromagnetic lock state detection circuit;
the electromagnetic lock driving circuit and the electromagnetic lock state detection circuit are electrically connected with the master control device.
Realize master control set to the drive control of electromagnetic lock through electromagnetic lock drive circuit, can real-time detection electromagnetic lock's the state of opening through electromagnetic lock state detection circuitry, and then the detection of the on off state of real-time detection intelligent ammeter case, the real-time report of the switching event of being convenient for improves and maintains the managerial ability.
It should be noted that, in this embodiment, one electromagnetic lock is respectively installed at the box door of the incoming line chamber and the box door of the outgoing line chamber of the intelligent electric meter box, and correspondingly, the electromagnetic lock driving circuit and the electromagnetic lock state detection circuit are respectively provided with two paths, which respectively correspond to the two electromagnetic locks.
Specifically, as shown in fig. 9-1, the electromagnetic lock driving circuit includes a MOS transistor Q3, a transistor Q5, a resistor R29, a resistor R31, a resistor R33, a resistor R35, and a diode D3;
the grid electrode of the MOS tube Q3 is electrically connected with the collector electrode of the triode Q5 through the resistor R31, the source electrode of the MOS tube Q3 is connected with a 12V direct-current power supply through the diode D3, the source electrode of the MOS tube Q3 is also electrically connected with the main control device, and the drain electrode of the MOS tube Q3 is grounded; the collector of the triode Q5 is also connected with a 12V direct-current power supply through the resistor R29, the base of the triode Q5 is electrically connected with the main control device through the resistor R33, the emitter of the triode Q5 is grounded, one end of the resistor R35 is connected with the base of the triode Q5 and the common end of the resistor R33, and the other end of the resistor R35 is grounded.
Through the electromagnetic lock driving circuit with the structure, a high-side driving circuit of an NPN type triode driving MOS (metal oxide semiconductor) tube is formed, when the input voltage is 0V, the triode Q5 is cut off, the MOS tube Q3 is conducted, the current passes through, the corresponding electromagnetic lock is released (ON), and the intelligent electric meter box is opened; on the contrary, when the input is + VCC, the triode Q5 is saturated, no current flows through the MOS pipe Q3, the corresponding electromagnetic lock is attracted (OFF), and the intelligent electric meter box is closed. In fig. 9-1, there is a freewheeling diode in the MOS transistor Q3, which functions as: when the input voltage is changed from 0V to + VCC, the triode Q5 is changed from cut-off to saturation, so that the current of the electromagnetic lock suddenly loses a circulation path, if no freewheeling diode exists, a large reverse electromotive force is generated at two ends of the coil, the polarity is positive at the bottom and negative at the top, and the voltage value can reach more than one hundred volts, the voltage plus the power supply voltage acts on the collector of the triode Q5 to damage the triode, so that the reverse electromotive force can be discharged according to the flow direction of the diode through the freewheeling diode, and the highest voltage of the collector of the triode Q5 to the ground is not more than + VCC + 0.7V.
It should be noted that, in this embodiment, specific connections between electronic components in the electromagnetic lock driving circuit and pins of the MCU are shown in fig. 9-1 in detail, in addition, there are 2 electromagnetic locks in this embodiment, fig. 9-1 is a circuit design diagram of one of the electromagnetic lock driving circuits, and the other electromagnetic lock driving circuit is the same as the electromagnetic lock driving circuit, as shown in fig. 9-2, and specific details are not repeated here.
Specifically, as shown in fig. 10-1, the electromagnetic lock state detection circuit includes a transistor Q1, a resistor R25, a resistor R27, a TVS tube TVS8 and a capacitor C75;
the base of triode Q1 passes through resistance R27 with the master control device electricity is connected, triode Q1's collecting electrode passes through resistance R25 with the master control device electricity is connected, triode Q1's collecting electrode still direct with the master control device electricity is connected, triode Q1's projecting pole direct with the master control device electricity is connected, TVS pipe TVS 8's one end with electric capacity C75's one end is all connected triode Q1's collecting electrode with on master control device's the common port, TVS pipe TVS 8's the other end with electric capacity C75's the other end all ground connection.
Because the electromagnetic lock can return low level signals when in a closed state, and can not return signals when in a released state, in fig. 10-1, when the electromagnetic lock is released, an emitting electrode of the triode Q1 has no signal, the triode Q1 is cut off, the MCU pin voltage is high level, when the electromagnetic lock is closed, the emitting electrode of the triode Q1 has extremely low level, the triode Q1 is saturated, the MCU pin voltage is low level, and the corresponding opening state of the electromagnetic lock can be judged by detecting the pin level.
It should be noted that, in the present embodiment, specific connections between electronic components in the electromagnetic lock state detection circuit and pins of the MCU are shown in fig. 10-1, and the same as fig. 9-1, fig. 10-1 is a circuit design diagram of one of the electromagnetic lock state detection circuits, and the other electromagnetic lock state detection circuit is the same as the electromagnetic lock state detection circuit, as shown in fig. 10-2, and specific details are not repeated here.
Preferably, the positioning safety protection instrument further comprises an identity ID card installed on the electric meter box, and the door opening identification communication device comprises a Bluetooth communication circuit and an identity identification circuit;
the Bluetooth communication circuit is in communication connection with an external door opening signal sending device, the identity recognition circuit is in communication connection with the identity ID card, and the Bluetooth communication circuit and the identity recognition circuit are both electrically connected with the master control device.
When bluetooth communication circuit and outside door opening signal transmission device communication connection, the ID card communication connection of installation on identity identification circuit and the ammeter case realizes the discernment to the ID card, and master control set sends drive signal through this identification signal to electromagnetic lock drive circuit, realizes that the intelligence of ammeter case is opened.
Specifically, the door opening signal sending device in this embodiment may be an intelligent terminal such as a smart phone and a tablet computer at a user side.
Specifically, the bluetooth communication circuit in this embodiment is specifically a bluetooth low energy 5.0 module, which supports all the features of bluetooth 5.0: 2M physical layer, long-range broadcast, extended broadcast, etc. A specific circuit design diagram is shown in fig. 11, a reset pin of the low power consumption bluetooth 5.0 module is connected to the MCU for low power consumption setting, and a serial port is pulled up to provide a default level; meanwhile, a plurality of paths of pins are reserved, and secondary development can be carried out when the requirement exists.
Specifically, the identity recognition circuit specifically comprises an encryption chip with the model number THK88-2 and a card reader with the model number ICM 522;
the card reader is in communication connection with the ID card, and the card reader and the encryption chip are both electrically connected with the main control device.
The identity recognition circuit adopts a THK88-2 encryption chip and an ICM522 card reader, the ICM522 card reader is used for recognizing an identity ID card, and the THK88-2 encryption chip is used for encrypting and storing the recognized identity information. An SPI interface is led out from the outside of the THK88-2 encryption chip and connected with the MCU, each path of SPI signal is connected with a 22 omega resistor in series and used for impedance matching and current limitation, and 3.3V is pulled up and used as an initial level to prevent initialization errors. The ICM522 card reader adopts an I2C interface, is connected with a pin of the MCU, and can complete the card reading function through instruction configuration.
The specific circuit design of the THK88-2 encryption chip in this embodiment is shown in fig. 12-1, and the circuit between the externally-led SPI interface and the MCU is shown in fig. 12-2.
Preferably, as shown in fig. 1, the positioning safety protection instrument further includes a backup power supply device, and the backup power supply device is electrically connected to the main control device and the positioning communication device, respectively.
Through the backup power supply device, the whole positioning safety protection instrument can keep normal work when the power source end is powered off, namely a power failure event occurs.
Preferably, as shown in fig. 13, the backup power supply device includes a lithium battery, a battery monitoring circuit, a charge control circuit, a battery charging circuit, a battery discharging circuit, and a discharge control circuit;
the lithium battery is respectively connected with the battery monitoring circuit, the battery charging circuit, the battery discharging circuit and the discharging control circuit, the battery monitoring circuit is electrically connected with the main control device, the charging control circuit is respectively connected with the battery charging circuit and the main control device, the battery discharging circuit is respectively connected with the discharging control circuit, the main control device and the positioning communication circuit, and the discharging control circuit is electrically connected with the main control device.
Specifically, in the present embodiment, the lithium battery is accessed through a battery interface, a circuit diagram of the battery interface is shown in fig. 14, and specific circuit design diagrams of the battery monitoring circuit, the charging control circuit, the battery charging circuit, the battery discharging circuit and the discharging control circuit are respectively shown in fig. 15 to 19.
Through the backup power supply device shown in fig. 13-19, a lithium battery is adopted for power supply, and one path of ADC is used for monitoring the battery power of the backup power supply device in real time, and because the high level voltage of the MCU hard pin is limited to 3.3V, AD acquisition is carried out through R73 and R75 partial pressure, and the device can still automatically work after power failure. The battery charging circuit adopts LM3658 as a charging management chip, and the charging current is set to be 500mA through R66. The battery discharge circuit adopts a TPS63020 switching power supply chip, C29, C85 and C86 are used as input filter capacitors, R76, R79, R80 and R81 are used as output voltage settings, CD3, CD4 and CD5 are used as output filter capacitors, and R78 is used as a power supply good type detection series resistor. When the system is powered on, the lithium battery is charged by default through the power supply, the charging control circuit and the battery charging circuit, the MCU monitors the voltage of the battery, the battery is guaranteed to be in a battery volume 1C state, namely a full charge state, meanwhile, the MCU monitors the voltage of a source end, when a power failure event occurs, the MCU reports the event through the 4G communication module, meanwhile, the lithium battery is discharged through the discharging control circuit and the battery discharging circuit, and the continuous operation of all parts in the whole positioning safety protection instrument is guaranteed.
Preferably, the positioning safety protection instrument further comprises an alarm device, and the alarm device is electrically connected with the main control device.
Through the alarm device, when the door opening signal received by the Bluetooth communication module is wrong and/or the identification information identified by the card reader in the identification circuit fails to be identified, the alarm device can give an alarm, so that the purpose of real-time protection is further achieved. The alarm device in this embodiment may be designed conventionally in the prior art, and specific details are not described herein.
In addition, in fig. 2, the MCU chip of this embodiment has a 128K FLASH and a 20K RAM, two serial ports are led out from the outside, one of the serial ports is connected to the bluetooth communication module for bluetooth communication, and the other serial port is connected to the 4G communication module for GPS positioning and 4G data transmission; and then, a 1-path SPI interface is led out and connected with an encryption chip in the door opening identification communication device, the SPI interface can be used for encrypting and storing NFC card reading data, and a 1-path I2C interface is also led out and connected with a card reader in the door opening identification communication device, and the SPI interface is used for card reading identity identification. 2-path GPIO is led out to drive and control two electromagnetic locks, the on-off states of the two paths of electromagnetic locks are detected, one path of signal is led out to detect the source end voltage, and one path of ADC is used for sampling and monitoring the backup power supply, so that the situation that the backup power supply is insufficient is prevented. The connections between the MCU and each module or chip are detailed in the pin symbols in fig. 2.
The complete working flow of the positioning safety protection instrument in the embodiment is described as follows:
the power supply in the power supply device is DC12V mains voltage, and the access is realized through the power interface, and the power is supplied to MCU and MCU peripheral circuit through the first voltage reduction circuit and the second voltage reduction circuit in the rethread power supply device, and the power is supplied to the 4G communication module through the first voltage reduction circuit and the third voltage reduction circuit, and the 4G communication module and MCU carry out serial port communication, upload the incident to the server of backstage. The Bluetooth communication circuit receives a door opening signal (specifically, a door opening signal sent by a user operating an APP on a mobile phone) sent by a door opening signal sending device of a user side, the MCU identifies the door opening signal, and if the received door opening signal is correct, the identity identification circuit (an encryption chip and a card reader) identifies and encrypts and stores identity information; otherwise, alarming is carried out through the alarming device, and the abnormal event is reported to the server of the background through the 4G communication module. In the process that the identity recognition circuit recognizes the identity information, if the identity information is successfully recognized, a success signal is sent to the MCU, the MCU controls the electromagnetic lock driving circuit to drive the two electromagnetic locks to open the door, and meanwhile, the MCU records the door opening event and uploads the door opening event to the server through the 4G communication module; otherwise, the MCU records the abnormal event, gives an alarm through the alarm device and uploads the alarm to the server through the 4G communication module; the backup power supply device adopts a lithium battery, when the power supply is electrified, the lithium battery is charged through the charging control circuit and the battery charging circuit, and the battery monitoring circuit simultaneously monitors the electric quantity of the lithium battery; when the power supply is dead, the power failure event is uploaded to the server of the background through the MCU and the 4G communication module, the lithium battery is discharged through the discharge control circuit and the battery discharge circuit to supply power to the whole positioning safety protection instrument, and the normal operation of the whole system is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
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| CN202111573598.XA CN114241638A (en) | 2021-12-21 | 2021-12-21 | Positioning safety protection instrument applied to electric meter box |
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