CN218888526U - Distribution lines end intelligent sensing device - Google Patents
Distribution lines end intelligent sensing device Download PDFInfo
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- CN218888526U CN218888526U CN202222438028.6U CN202222438028U CN218888526U CN 218888526 U CN218888526 U CN 218888526U CN 202222438028 U CN202222438028 U CN 202222438028U CN 218888526 U CN218888526 U CN 218888526U
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Abstract
The utility model relates to the technical field of LTU intelligent sensing, in particular to a distribution line tail end intelligent sensing device, which comprises a communication module, an analog quantity acquisition module and a main control chip; the communication module comprises an LoRa wireless communication circuit, a 485 communication circuit and a 433MHz wireless communication circuit; the master control chip is respectively and electrically connected with the analog quantity acquisition module, the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit; the analog quantity acquisition module is electrically connected with the tail end of an external distribution line, and the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit are respectively in communication connection with a receiving end of a peripheral. A plurality of communication modes of distribution line terminal equipment are added, the original single 485 communication mode is added, loRa wireless communication, 433MHz wireless communication and 4-20 mA analog quantity communication are supported, and the simplification and limitation of equipment communication are solved.
Description
Technical Field
The utility model relates to a LTU intelligent sensing technical field especially relates to a terminal intelligent sensing device of distribution lines.
Background
In the power distribution terminal equipment, the traditional LTU only supports the terminal equipment accessed to the 485 communication mode, and the communication protocol of the traditional LTU is converted into a power carrier form to be added into a power grid, so that the limitation is large, and the access of other types of terminal equipment is not favorably expanded. Meanwhile, in the time that the power carrier communication is abnormal and data cannot be reported, the terminal data is lost and the network can not be disconnected for storage.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a distribution lines terminal intelligent sensing device is provided, multiple communication mode that can support terminal equipment is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be:
an intelligent sensing device for the tail end of a distribution line comprises a communication module, an analog quantity acquisition module and a main control chip;
the communication module comprises an LoRa wireless communication circuit, a 485 communication circuit and a 433MHz wireless communication circuit;
the master control chip is respectively and electrically connected with the analog quantity acquisition module, the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit;
the analog quantity acquisition module is electrically connected with the tail end of an external distribution line, and the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit are respectively in communication connection with a receiving end of a peripheral.
The beneficial effects of the utility model reside in that: multiple communication modes of distribution line terminal equipment are increased, the original single 485 communication mode is increased to support LoRa wireless communication, 433MHz wireless communication and 4-20 mA analog quantity communication, and the simplification and limitation of equipment communication are solved.
Drawings
FIG. 1 is a system block diagram of an intelligent sensing device at the end of a distribution line;
FIG. 2 is a circuit diagram of a main control chip;
FIG. 3 is a circuit diagram of a 485 communication circuit;
fig. 4 is a circuit connection diagram of the LoRa wireless communication circuit;
FIG. 5 is a circuit diagram of a 433MHz wireless communication circuit;
FIG. 6 is a circuit diagram of a carrier signal communication circuit;
FIG. 7 is a circuit diagram of a data storage module;
FIG. 8 is a circuit diagram of the analog acquisition module;
FIG. 9 is a circuit diagram of the power circuit;
description of the reference symbols:
1. a main control chip; 2. a data storage module; 3. a power supply module; 4. an analog quantity acquisition module; 5. a communication module; 51. a LoRa wireless communication circuit; 52. 485 communication circuitry; 53. 433MHz wireless communications circuitry; 54. a carrier signal communication circuit.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 9, the utility model discloses a distribution line terminal intelligent sensing device, which comprises a communication module, an analog quantity acquisition module and a main control chip;
the communication module comprises an LoRa wireless communication circuit, a 485 communication circuit and a 433MHz wireless communication circuit;
the master control chip is respectively and electrically connected with the analog quantity acquisition module, the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit;
the analog quantity acquisition module is electrically connected with the tail end of an external distribution line, and the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit are respectively in communication connection with a receiving end of a peripheral.
From the above description, the device increases multiple communication modes of the distribution line terminal equipment, and increases the original single 485 communication mode to support LoRa wireless communication, 433MHz wireless communication and 4-20 mA analog quantity communication, thereby solving the simplification and limitation of equipment communication.
Further, the LoRa wireless communication circuit comprises an LoRa chip, an IPX antenna interface T1, a transient suppression diode D3, a resistor R8, a resistor R14, a resistor R22, a capacitor C13, a capacitor C14, a capacitor C18, a capacitor C20, and a capacitor C21;
a second pin of the LoRa chip is electrically connected with one end of the capacitor C13 and one end of the resistor R8, the other end of the resistor R8 is electrically connected with one end of the capacitor C14, one end of the transient suppression diode D3 and the IPX antenna interface T1, and the other end of the capacitor C13, the other end of the capacitor C14 and the other end of the transient suppression diode D3 are all grounded;
a fourth pin of the LoRa chip is electrically connected with one end of a resistor R14 and one end of a capacitor C18 respectively, the other end of the resistor R14 is electrically connected with an external 3.3V power supply, and the other end of the capacitor C18 is grounded;
one end of the capacitor C20 is electrically connected with one end of the capacitor C21, an external 3.3V power supply, and a thirteenth pin and a fourteenth pin of the LoRa chip, and the other end of the capacitor C20 and the other end of the capacitor C21 are grounded;
one end of the resistor R22 is electrically connected with a twenty-third pin of the LoRa chip, and the other end of the resistor R22 is electrically connected with a peripheral 3.3V power supply.
From the above description, the effect of this circuit is that the problem of loRa terminal sensor data access is solved, realizes interacting with MCU data, and R14 is the chip resistor, and C18 is ceramic capacitor, and it constitutes the reset circuit of loRa module, provides the condition for the normal operating of loRa module. The C20 and the C21 form a filter circuit of the power supply and provide stable working voltage for the communication chip. T1 is an IPX antenna pedestal which can be externally connected with a high-power antenna to enhance the communication stability. D3 is a transient suppression diode and has the function of preventing external static electricity from entering a circuit through the antenna to cause damage to components.
Further, the 485 communication circuit comprises a 485 communication chip U8, a common mode choke LL1, a transient suppression diode Z2, a resistor R19, a resistor R20, a resistor R21, a resistor R25, a resistor R26, a capacitor C22, a capacitor C23, a capacitor C24 and a capacitor C25;
one end of the capacitor C24 is electrically connected with one end of the capacitor C22, one end of the capacitor C23, and the twelfth pin and the nineteenth pin of the 485 communication chip U8 respectively, and the other end of the capacitor C24, the other end of the capacitor C22 and the other end of the capacitor C23 are all grounded;
a thirteenth pin of the 485 communication chip U8 is electrically connected with an eighteenth pin of the 485 communication chip U8, one end of a resistor R19 and one end of a resistor R25 respectively, and the other end of the resistor R25 is electrically connected with an external power supply;
a thirteenth pin of the 485 communication chip U8 is electrically connected with an eighteenth pin of the 485 communication chip U8, one end of a resistor R19 and one end of a resistor R25 respectively, and the other end of the resistor R25 is electrically connected with an external power supply;
a fifteenth pin of the 485 communication chip U8 is electrically connected with a seventeenth pin of the 485 communication chip U8, one end of a resistor R21 and one end of a resistor R26 respectively, and the other end of the resistor R26 is grounded;
the other end of the resistor R19 is electrically connected with one end of the resistor R20 and the fourth pin of the common mode choke LL1 respectively, and the other end of the resistor R21 is electrically connected with the other end of the resistor R20 and the first pin of the common mode choke LL1 respectively;
and a third pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z1, a second pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z2, and the other end of the transient suppression diode Z1 and the other end of the transient suppression diode Z2 are both grounded.
It can be known from the above description that the module is used for solving the data access problem of the 485 terminal sensor and realizing data interaction with the MCU, and the C24, C22 and C23 form a filter circuit of the power supply to provide a stable internal isolation working voltage for the communication chip. R25 and R26 are pull-up and pull-down resistors, and the function of the pull-up and pull-down resistors is to increase the driving capability on the AB differential line and effectively improve the communication stability. R19 and R21 are chip resistors, LL1 is a common-mode choke coil, and common-mode interference on a communication line can be effectively inhibited. And Z1 and Z2 are transient suppression diodes, so that high-voltage and high-frequency pulse interference on the communication line can be effectively suppressed.
Further, the 433MHz wireless communication circuit includes a 433MHz wireless transmitting chip U2, a resistor R3, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, and a spring antenna E1;
a ninth pin of the 433MHz wireless transmitting chip U2 is respectively and electrically connected with one end of a resistor R3 and one end of a capacitor C8, the other end of the resistor R3 is respectively and electrically connected with one end of a capacitor C9 and the spring antenna E1, and the other end of the capacitor C8 and the other end of the capacitor C9 are both grounded;
the second pin of 433MHz wireless transmitting chip U2 is connected with the one end of electric capacity C10, the one end of electric capacity C11 and the 3.3V power electricity of peripheral hardware respectively, and 433MHz wireless transmitting chip U2's first pin, the other end of electric capacity C10 and the one end of electric capacity C11 all ground connection.
As can be seen from the above description, the module is used for solving the problem of data access of the 433MHz terminal sensor and realizing data interaction with the MCU; c8, C9 are ceramic capacitors, R3 is a chip resistor, it forms an antenna matching circuit, is used for adjusting the impedance matching of antenna, module, PCB routing, in order to reach the best signal effect; e1 is a spring antenna which is used for externally sending data to enhance wireless signals.
Further, the device also comprises a carrier signal communication circuit; the carrier signal communication circuit is electrically connected with the main control chip.
The carrier signal communication circuit comprises a power carrier transceiving modulation-demodulation chip U5, a carrier signal coupling circuit U4, a capacitor C12, a capacitor C17 and a capacitor C16;
a fourth pin of the power carrier transceiving modem chip U5 is electrically connected with one end of the capacitor C16, a sixth pin of the power carrier transceiving modem chip U5 is electrically connected with one end of the capacitor C17, and the other end of the capacitor C16 and the other end of the capacitor C17 are grounded;
a seventh pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with a sixth pin of the carrier signal coupling circuit U4, one end of the capacitor C12 is electrically connected with a first pin of the carrier signal coupling circuit U4, and the other end of the capacitor C12 is electrically connected with the tail end of an external distribution line.
As can be seen from the above description, the module is used to solve the problem of data transmission and communication in the power grid, and implement data interaction with the concentrator; u5 is a power carrier transceiving modulation and demodulation chip and is connected with a master control MCU serial port through serial port interfaces U5-5 and U5-7 to realize interaction between data; the C16 and the C17 play a decoupling role, and can prevent the current fluctuation formed in the power supply circuit from influencing the normal operation of the circuit when the current of the front circuit and the current of the rear circuit are changed.
Further, the analog quantity acquisition module comprises an operational amplifier chip U6, a capacitor C15, a capacitor C19, a resistor R7, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17 and a resistor R18;
a second pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R9 and one end of a resistor R7 respectively, a third pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R10 and one end of a resistor R12 respectively, the other end of the resistor R9 is electrically connected with one end of a resistor R11, the other end of the resistor R10 is electrically connected with the other end of the resistor R11, a first pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R7 and one end of a capacitor C15 respectively, and the other end of the capacitor C15 and the other end of the resistor R12 are grounded;
the sixth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R15 and one end of a resistor R13, the fifth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R16 and one end of a resistor R18, the other end of the resistor R15 is electrically connected with one end of a resistor R17, the other end of the resistor R16 is electrically connected with the other end of the resistor R17, the seventh pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R13 and one end of a capacitor C19, and the other end of the capacitor C19 and the other end of the resistor R18 are grounded.
As can be seen from the above description, the module is used for realizing data acquisition of analog signal terminal equipment and supporting access to two paths of 4-20 mA terminal equipment. R9, R10, R7, R12 and U6A form a differential comparison circuit, R11 is a sampling resistor, when the input current is 4mA, the output voltage of U6A-1 is 0.4V, when the input current is 20mA, the output voltage of U6A-1 is 2V, and the MCU acquires the voltage through an ADC port, so that the input current value can be correspondingly obtained.
Further, the system also comprises a data storage module; the data storage module is electrically connected with the main control chip.
The data storage module comprises a FLASH storage chip U3, a resistor R2 and a capacitor C4;
a first pin of the FLASH memory chip U3 is electrically connected with one end of a resistor R2, and the other end of the resistor R2 is electrically connected with an external 3.3V power supply;
one end of the capacitor C4 is electrically connected with a seventh pin and an eighth pin of the FLASH memory chip U3 respectively, and the other end of the capacitor C4 is grounded;
the main control chip is electrically connected with the first pin, the second pin, the fifth pin and the sixth pin of the FLASH memory chip respectively.
From the above description, the module is used for storing the terminal device data collected in the network disconnection, and U3 is a Flash memory chip. R2 is a pull-up resistor of a chip selection signal, and the capacitor C4 plays a role in decoupling.
Further, the device also comprises a power supply module, wherein U1 is an AC-DC voltage conversion module and is used for converting the AC at the front end into DC 12V; f1 is a fuse, and R1 is a piezoresistor, so that the circuit protection effect is achieved; c2, C3, C6 and C7 are filter capacitors, and play a role in stabilizing a system power supply and filtering interference of high-frequency signals; IC1, D1, L2, R5, R6, C1, C5 constitute DC-DC's voltage step-down converting circuit, wherein C1 is used for IC1 internal feedback, C5 is used for voltage reference alternating current feedback, can effectively improve the voltage stability of DC-DC circuit output, reduce the output ripple; l1 is a magnetic bead and serves to suppress high frequency signals in the circuit. And the R4 and the D2 form an indicator light circuit, and the indicator light circuit is lightened after the system is electrified to play an indicating role.
Furthermore, the circuit also comprises a reset circuit, a crystal oscillator circuit and a filter circuit;
the main control chip is respectively and electrically connected with the reset circuit, the crystal oscillator circuit and the filter circuit.
The utility model provides a pair of terminal intelligent sensing device of distribution lines's theory of operation does:
the analog quantity acquisition module is used for acquiring data of the analog signal terminal equipment and can support the access of two paths of 4-20 mA terminal equipment. R9, R10, R7, R12 and U6A form a differential comparison circuit, R11 is a sampling resistor, when the input current is 4mA, the output voltage of U6A-1 is 0.4V, when the input current is 20mA, the output voltage of U6A-1 is 2V, and the MCU acquires the voltage through an ADC port, so that the input current value can be correspondingly obtained. The main control chip processes the acquired data and controls the communication module to transmit the data to a receiving end of the peripheral;
in the 433MHz wireless communication module, U2 is a 433MHz wireless transmitting chip and is connected with a serial port of a main control MCU through serial port interfaces U2-5 and U2-5 to realize the interaction between data, the main control MCU can enable the chip to enter different working modes by setting the levels of U2-3 pins and U2-7 pins, and the chip can be set to be in a low power consumption mode when no data is transmitted so as to reduce the power consumption of the whole system;
in the LoRa wireless module, U7 is a LoRa wireless transmitting chip and is connected with a serial port of a main control MCU through serial ports U7-19 and U7-20 to realize interaction between data, and the main control MCU can also enable the module to enter a sleep mode through a control port U7-23.
In the 485 communication module, U8 is a 485 receiving and transmitting chip and is connected with a serial port of a master control MCU through serial ports U8-4 and U8-7 to realize interaction among data, and the 485 communication belongs to a half-duplex mode, so that the master control MCU can switch the module into a receiving or transmitting mode according to requirements through control ports U8-5 and U8-6. In the carrier signal communication module, a C12 and U4 carrier signal coupling circuit extracts and couples carrier signals in a power network, enters U5 to perform corresponding modulation and demodulation, U5 is a power carrier transceiving modulation and demodulation chip and is connected with a master control MCU serial port through serial port interfaces U5-5 and U5-7 to realize data interaction, and the master control MCU can start the module to reset according to requirements through a control interface U5-1.
Referring to fig. 1 to 9, a first embodiment of the present invention is: an intelligent sensing device for the tail end of a distribution line comprises a communication module, an analog quantity acquisition module and a main control chip;
the communication module comprises an LoRa wireless communication circuit, a 485 communication circuit and a 433MHz wireless communication circuit;
the master control chip is respectively and electrically connected with the analog quantity acquisition module, the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit;
the analog quantity acquisition module is electrically connected with the tail end of an external distribution line, and the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit are respectively in communication connection with a receiving end of a peripheral.
The model of the main control chip is N32G455REL7.
In this embodiment, the LoRa wireless communication circuit includes an LoRa chip, an IPX antenna interface T1, a transient suppression diode D3, a resistor R8, a resistor R14, a resistor R22, a capacitor C13, a capacitor C14, a capacitor C18, a capacitor C20, and a capacitor C21;
a second pin of the LoRa chip is electrically connected to one end of the capacitor C13 and one end of the resistor R8, the other end of the resistor R8 is electrically connected to one end of the capacitor C14, one end of the transient suppression diode D3, and the IPX antenna interface T1, and the other end of the capacitor C13, the other end of the capacitor C14, and the other end of the transient suppression diode D3 are all grounded; a fourth pin of the LoRa chip is electrically connected with one end of a resistor R14 and one end of a capacitor C18 respectively, the other end of the resistor R14 is electrically connected with an external 3.3V power supply, and the other end of the capacitor C18 is grounded; one end of the capacitor C20 is electrically connected with one end of the capacitor C21, an external 3.3V power supply, and a thirteenth pin and a fourteenth pin of the LoRa chip, and the other end of the capacitor C20 and the other end of the capacitor C21 are grounded; one end of the resistor R22 is electrically connected with a twenty-third pin of the LoRa chip, and the other end of the resistor R22 is electrically connected with a peripheral 3.3V power supply.
The model of the LoRa chip is WH-L101-L-P-H10, the model of the IPX antenna interface T1 is 50OHM, the model of the transient suppression diode D3 is LXES15AAA1-153, the resistance of the resistor R14 is 10K omega, the resistance of the resistor R22 is 10K omega, the capacitance of the capacitor C18 is 100nF, the capacitance of the capacitor C20 is 10uF, the capacitance of the capacitor C21 is 100nF, and the resistor R8, the capacitor C13 and the capacitor C14 form an impedance matching circuit for adjusting the impedance matching of the antenna, the module and the PCB wiring.
In this embodiment, the 485 communication circuit includes a 485 communication chip U8, a common mode choke LL1, a transient suppression diode Z2, a resistor R19, a resistor R20, a resistor R21, a resistor R25, a resistor R26, a capacitor C22, a capacitor C23, a capacitor C24, and a capacitor C25;
one end of the capacitor C24 is electrically connected with one end of the capacitor C22, one end of the capacitor C23, and the twelfth pin and the nineteenth pin of the 485 communication chip U8 respectively, and the other end of the capacitor C24, the other end of the capacitor C22 and the other end of the capacitor C23 are grounded; a thirteenth pin of the 485 communication chip U8 is electrically connected with an eighteenth pin of the 485 communication chip U8, one end of a resistor R19 and one end of a resistor R25 respectively, and the other end of the resistor R25 is electrically connected with an external power supply; a thirteenth pin of the 485 communication chip U8 is electrically connected with an eighteenth pin of the 485 communication chip U8, one end of a resistor R19 and one end of a resistor R25 respectively, and the other end of the resistor R25 is electrically connected with an external power supply; a fifteenth pin of the 485 communication chip U8 is electrically connected with a seventeenth pin of the 485 communication chip U8, one end of a resistor R21 and one end of a resistor R26 respectively, and the other end of the resistor R26 is grounded; the other end of the resistor R19 is electrically connected with one end of the resistor R20 and the fourth pin of the common mode choke LL1 respectively, and the other end of the resistor R21 is electrically connected with the other end of the resistor R20 and the first pin of the common mode choke LL1 respectively; the third pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z1, the second pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z2, and the other end of the transient suppression diode Z1 and the other end of the transient suppression diode Z2 are both grounded.
The model of the 485 communication chip U8 is ADM2587E, the model of the common mode choke LL1 is 744222, the models of the transient suppression diode Z1 and the transient suppression diode Z2 are LXES15AAA1-153, the resistance value of the resistor R19 is 10 omega, the resistance value of the resistor R20 is 120 omega, the resistance value of the resistor R21 is 10 omega, the resistance value of the resistor R25 is 4.7K omega, the resistance value of the resistor R26 is 4.7K omega, the capacitance value of the capacitor C22 is 100nF, the capacitance value of the capacitor C23 is 10nF, the capacitance value of the capacitor C24 is 10uF/16V, and the capacitance value of the capacitor C25 is 100nF;
in this embodiment, the 433MHz wireless communication circuit includes a 433MHz wireless transmitting chip U2, a resistor R3, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, and a spring antenna E1;
a ninth pin of the 433MHz wireless transmitting chip U2 is respectively and electrically connected with one end of a resistor R3 and one end of a capacitor C8, the other end of the resistor R3 is respectively and electrically connected with one end of a capacitor C9 and the spring antenna E1, and the other end of the capacitor C8 and the other end of the capacitor C9 are both grounded;
the second pin of 433MHz wireless transmitting chip U2 is connected with the one end of electric capacity C10, the one end of electric capacity C11 and the 3.3V power electricity of peripheral hardware respectively, and 433MHz wireless transmitting chip U2's first pin, the other end of electric capacity C10 and the one end of electric capacity C11 all ground connection.
The model of the wireless transmitting chip U2 is APC240, the capacitance value of the capacitor C10 is APC240, the capacitance value of the capacitor C11 is 10uF, and the resistor R3, the capacitor C8, and the capacitor C9 form an impedance matching circuit for adjusting the impedance matching of the antenna, the module, and the PCB trace.
In this embodiment, the carrier signal communication circuit includes a power carrier transceiving modulation and demodulation chip U5, a carrier signal coupling circuit U4, a capacitor C12, a capacitor C17, and a capacitor C16;
a fourth pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with one end of a capacitor C16, a sixth pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with one end of a capacitor C17, and the other end of the capacitor C16 and the other end of the capacitor C17 are grounded; a seventh pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with a sixth pin of the carrier signal coupling circuit U4, one end of the capacitor C12 is electrically connected with a first pin of the carrier signal coupling circuit U4, and the other end of the capacitor C12 is electrically connected with the tail end of an external distribution line.
The model of the power carrier transceiving modulation-demodulation chip U5 is ES1642-NC, the parameter of the carrier signal coupling circuit U4 is 100uH 1.
In this embodiment, the analog acquisition module includes an operational amplifier chip U6, a capacitor C15, a capacitor C19, a resistor R7, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17, and a resistor R18;
a second pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R9 and one end of a resistor R7 respectively, a third pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R10 and one end of a resistor R12 respectively, the other end of the resistor R9 is electrically connected with one end of a resistor R11, the other end of the resistor R10 is electrically connected with the other end of the resistor R11, a first pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R7 and one end of a capacitor C15 respectively, and the other end of the capacitor C15 and the other end of the resistor R12 are grounded; the sixth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R15 and one end of a resistor R13, the fifth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R16 and one end of a resistor R18, the other end of the resistor R15 is electrically connected with one end of a resistor R17, the other end of the resistor R16 is electrically connected with the other end of the resistor R17, the seventh pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R13 and one end of a capacitor C19, and the other end of the capacitor C19 and the other end of the resistor R18 are both grounded.
The model of the operational amplifier chip U6 is MCP6002T-I/SN, the capacitance value of the capacitor C15 is 100nF, the capacitance value of the capacitor C19 is 100nF, the resistance value of the resistor R7 is 100K omega, the resistance value of the resistor R9 is 100K omega, the resistance value of the resistor R10 is 100K omega, the resistance value of the resistor R11 is 100 omega, the resistance value of the resistor R12 is 100K omega, the resistance value of the resistor R13 is 100K omega, the resistance value of the resistor R15 is 100K omega, the resistance value of the resistor R16 is 100K omega, the resistance value of the resistor R17 is 100 omega, and the resistance value of the resistor R18 is 100K omega.
In this embodiment, the distribution line terminal intelligent sensing device further includes a data storage module; the data storage module is electrically connected with the main control chip.
The data storage module comprises a FLASH storage chip U3, a resistor R2 and a capacitor C4;
a first pin of the FLASH memory chip U3 is electrically connected with one end of a resistor R2, and the other end of the resistor R2 is electrically connected with an external 3.3V power supply; one end of the capacitor C4 is electrically connected with a seventh pin and an eighth pin of the FLASH memory chip U3 respectively, and the other end of the capacitor C4 is grounded; the main control chip is electrically connected with the first pin, the second pin, the fifth pin and the sixth pin of the FLASH memory chip respectively.
The model of the FLASH memory chip U3 is W25Q64JVSSIQ, the resistance value of the resistor R2 is 10K omega, and the capacitance value of the capacitor C4 is 100nF.
In this embodiment, as can be seen from fig. 9, the distribution line terminal intelligent sensing device further includes a power module, where the AC-DC voltage conversion module U1 is of a type LDE05-20B12, the fuse F1 is of a type 5RT-010H, the voltage dependent resistor R1 is of a type 10D561K, the capacitor C2 is of a capacitance value of 1000uF/50V, the capacitor C3 is of a capacitance value of 100nF, the capacitor C6 is of a capacitance value of 470uF/16V, the capacitor C7 is of a capacitance value of 100nF, the voltage regulator module IC1 is of a type ETA2842, the diode D1 is of a type SS24, the parameter of the inductor L2 is 10uH, the resistance of the resistor R5 is 68K Ω, the resistance of the resistor R6 is 22K Ω, the capacitance of the capacitor C1 is 10nF, the capacitance of the capacitor C5 is of 10nF, the resistance of the magnetic bead L1 is 600, the resistance of the resistor R4 is 4.7K Ω, and the resistance of the light emitting diode D2 is 0603 Ω.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. The intelligent sensing device for the tail end of the distribution line is characterized by comprising a communication module, an analog quantity acquisition module and a main control chip;
the communication module comprises an LoRa wireless communication circuit, a 485 communication circuit and a 433MHz wireless communication circuit;
the master control chip is respectively and electrically connected with the analog quantity acquisition module, the LoRa wireless communication circuit, the 485 communication circuit and the 433MHz wireless communication circuit;
analog quantity acquisition module is connected with outside distribution lines end electricity, loRa wireless communication circuit, 485 communication circuit and 433MHz wireless communication circuit establish communication connection with the receiving terminal of peripheral hardware respectively.
2. The distribution line terminal intelligent sensing device according to claim 1, wherein the LoRa wireless communication circuit comprises an LoRa chip, an IPX antenna interface T1, a transient suppression diode D3, a resistor R8, a resistor R14, a resistor R22, a capacitor C13, a capacitor C14, a capacitor C18, a capacitor C20, and a capacitor C21;
a second pin of the LoRa chip is electrically connected to one end of the capacitor C13 and one end of the resistor R8, the other end of the resistor R8 is electrically connected to one end of the capacitor C14, one end of the transient suppression diode D3, and the IPX antenna interface T1, and the other end of the capacitor C13, the other end of the capacitor C14, and the other end of the transient suppression diode D3 are all grounded;
a fourth pin of the LoRa chip is electrically connected with one end of a resistor R14 and one end of a capacitor C18 respectively, the other end of the resistor R14 is electrically connected with an external 3.3V power supply, and the other end of the capacitor C18 is grounded;
one end of the capacitor C20 is electrically connected with one end of the capacitor C21, an external 3.3V power supply, and a thirteenth pin and a fourteenth pin of the LoRa chip, and the other end of the capacitor C20 and the other end of the capacitor C21 are grounded;
one end of the resistor R22 is electrically connected with a twenty-third pin of the LoRa chip, and the other end of the resistor R22 is electrically connected with a peripheral 3.3V power supply.
3. The intelligent sensing device for the distribution line terminal according to claim 1, wherein the 485 communication circuit comprises a 485 communication chip U8, a common mode choke LL1, a transient suppression diode Z2, a resistor R19, a resistor R20, a resistor R21, a resistor R25, a resistor R26, a capacitor C22, a capacitor C23, a capacitor C24 and a capacitor C25;
one end of the capacitor C24 is electrically connected with one end of the capacitor C22, one end of the capacitor C23, and the twelfth pin and the nineteenth pin of the 485 communication chip U8 respectively, and the other end of the capacitor C24, the other end of the capacitor C22 and the other end of the capacitor C23 are grounded;
a thirteenth pin of the 485 communication chip U8 is electrically connected with an eighteenth pin of the 485 communication chip U8, one end of a resistor R19 and one end of a resistor R25 respectively, and the other end of the resistor R25 is electrically connected with an external power supply;
a fifteenth pin of the 485 communication chip U8 is electrically connected with a seventeenth pin of the 485 communication chip U8, one end of a resistor R21 and one end of a resistor R26 respectively, and the other end of the resistor R26 is grounded;
the other end of the resistor R19 is electrically connected with one end of the resistor R20 and the fourth pin of the common mode choke LL1 respectively, and the other end of the resistor R21 is electrically connected with the other end of the resistor R20 and the first pin of the common mode choke LL1 respectively;
the third pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z1, the second pin of the common mode choke LL1 is electrically connected with one end of the transient suppression diode Z2, and the other end of the transient suppression diode Z1 and the other end of the transient suppression diode Z2 are both grounded.
4. The intelligent distribution line terminal sensing device according to claim 1, wherein the 433MHz wireless communication circuit comprises a 433MHz wireless transmitting chip U2, a resistor R3, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11 and a spring antenna E1;
a ninth pin of the 433MHz wireless transmitting chip U2 is respectively and electrically connected with one end of a resistor R3 and one end of a capacitor C8, the other end of the resistor R3 is respectively and electrically connected with one end of a capacitor C9 and the spring antenna E1, and the other end of the capacitor C8 and the other end of the capacitor C9 are both grounded;
the second pin of 433MHz wireless transmitting chip U2 is connected with the one end of electric capacity C10, the one end of electric capacity C11 and the 3.3V power electricity of peripheral hardware respectively, and 433MHz wireless transmitting chip U2's first pin, the other end of electric capacity C10 and the one end of electric capacity C11 all ground connection.
5. The intelligent sensing device for the end of a power distribution line according to claim 1, further comprising a carrier signal communication circuit;
the carrier signal communication circuit is electrically connected with the main control chip.
6. The intelligent sensing device for the tail end of the power distribution line according to claim 5, wherein the carrier signal communication circuit comprises a power carrier transceiving modulation and demodulation chip U5, a carrier signal coupling circuit U4, a capacitor C12, a capacitor C17 and a capacitor C16;
a fourth pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with one end of a capacitor C16, a sixth pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with one end of a capacitor C17, and the other end of the capacitor C16 and the other end of the capacitor C17 are grounded;
a seventh pin of the power carrier transceiving modulation and demodulation chip U5 is electrically connected with a sixth pin of the carrier signal coupling circuit U4, one end of the capacitor C12 is electrically connected with a first pin of the carrier signal coupling circuit U4, and the other end of the capacitor C12 is electrically connected with the tail end of an external distribution line.
7. The intelligent distribution line terminal sensing device according to claim 1, wherein the analog acquisition module comprises an operational amplifier chip U6, a capacitor C15, a capacitor C19, a resistor R7, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R15, a resistor R16, a resistor R17 and a resistor R18;
a second pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R9 and one end of a resistor R7 respectively, a third pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R10 and one end of a resistor R12 respectively, the other end of the resistor R9 is electrically connected with one end of a resistor R11, the other end of the resistor R10 is electrically connected with the other end of the resistor R11, a first pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R7 and one end of a capacitor C15 respectively, and the other end of the capacitor C15 and the other end of the resistor R12 are grounded;
the sixth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R15 and one end of a resistor R13, the fifth pin of the operational amplifier chip U6 is electrically connected with one end of a resistor R16 and one end of a resistor R18, the other end of the resistor R15 is electrically connected with one end of a resistor R17, the other end of the resistor R16 is electrically connected with the other end of the resistor R17, the seventh pin of the operational amplifier chip U6 is electrically connected with the other end of the resistor R13 and one end of a capacitor C19, and the other end of the capacitor C19 and the other end of the resistor R18 are both grounded.
8. The intelligent sensing device for the distribution line terminal according to claim 1, further comprising a data storage module; the data storage module is electrically connected with the main control chip.
9. The intelligent sensing device for the tail end of the distribution line according to claim 8, wherein the data storage module comprises a FLASH memory chip U3, a resistor R2 and a capacitor C4;
a first pin of the FLASH memory chip U3 is electrically connected with one end of a resistor R2, and the other end of the resistor R2 is electrically connected with an external 3.3V power supply;
one end of the capacitor C4 is electrically connected with a seventh pin and an eighth pin of the FLASH memory chip U3 respectively, and the other end of the capacitor C4 is grounded;
the main control chip is electrically connected with the first pin, the second pin, the fifth pin and the sixth pin of the FLASH memory chip respectively.
10. The intelligent sensing device for the tail end of the distribution line according to claim 1, further comprising a reset circuit, a crystal oscillator circuit and a filter circuit;
the main control chip is respectively and electrically connected with the reset circuit, the crystal oscillator circuit and the filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222438028.6U CN218888526U (en) | 2022-09-14 | 2022-09-14 | Distribution lines end intelligent sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222438028.6U CN218888526U (en) | 2022-09-14 | 2022-09-14 | Distribution lines end intelligent sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN218888526U true CN218888526U (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222438028.6U Active CN218888526U (en) | 2022-09-14 | 2022-09-14 | Distribution lines end intelligent sensing device |
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| Country | Link |
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| CN (1) | CN218888526U (en) |
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