CN109493582B - Split type big dipper data transmission terminal and big dipper long-range electric power system of checking meter - Google Patents
Split type big dipper data transmission terminal and big dipper long-range electric power system of checking meter Download PDFInfo
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- CN109493582B CN109493582B CN201811072760.8A CN201811072760A CN109493582B CN 109493582 B CN109493582 B CN 109493582B CN 201811072760 A CN201811072760 A CN 201811072760A CN 109493582 B CN109493582 B CN 109493582B
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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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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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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
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention relates to the technical field of Beidou satellite navigation, and discloses a split type Beidou data transmission terminal and a Beidou remote electric power meter reading system. In the invention, the split Beidou satellite data transmission terminal comprises: the host module is independent of the antenna module, and is provided with a power supply interface for being connected with a power supply interface on the collector; the host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module; the antenna module is connected with the power supply interface; the antenna module comprises a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, and the compensated power supply current is used for supplying power to the antenna, so that the electric power data transmission blind area of a GPRS network-free area is solved, manual meter reading is not needed even in a remote area, manpower and material resources are saved, and meanwhile, the power consumption is favorably reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of Beidou satellite navigation, in particular to a split type Beidou data transmission terminal and a Beidou remote electric meter reading system.
Background
The Beidou satellite navigation system is a global positioning and communication system which is self-developed by China. The system consists of a space end, a ground end and a user end, can provide high-precision, high-reliability positioning, navigation and time service for various users all day long, and has short message capability. At present, the construction of a Beidou regional satellite navigation system is completed, and the coverage of Asia-Pacific regions is realized. Compared with other three satellite navigation systems (a GPS system, a GLONASS system and a Galileo system), the Beidou satellite navigation system has the characteristic and the advantage of short message communication service. The Beidou system can inform a user of time and place, and can also send data through a satellite in a short message mode, and the satellite communication means is a good data transmission means in a non-public network coverage area. The Beidou satellite navigation system is still in the middle stage of development, and is advancing from a regional satellite navigation system to a global satellite navigation system, so that the Beidou satellite navigation system has a wide market development prospect.
However, the inventors found that at least the following problems exist in the prior art: aiming at data acquisition in the power industry, the current communication means of an uplink channel mainly adopts modes of optical fiber, Ethernet, GPRS and the like for communication. For hydropower stations in mountainous areas, pasturing areas and deep mountains with rare smoke, public station transformers, special transformer users, low-voltage residents and the like, centralized meter reading is carried out, optical fiber channels do not exist, stable GPRS signal coverage cannot be guaranteed, and the problems of high cost, complex construction and maintenance and the like exist in newly-built communication channels, so that a power supply office needs to manually copy and receive electricity utilization conditions of the sites, great waste of manpower and material resources is caused, and a power supply source of the Beidou all-in-one machine in the prior art is large and high in power consumption.
Disclosure of Invention
The embodiment of the invention aims to provide a split type Beidou data transmission terminal and a Beidou remote electric power meter reading system, which solve the electric power data transmission blind area of a GPRS network-free area, do not need manual meter reading even in a remote area, save manpower and material resources and are beneficial to reducing power consumption.
In order to solve the above technical problem, an embodiment of the present invention provides a split type beidou data transmission terminal, including: the host module is independent of the antenna module, and is provided with a power supply interface for being connected with a power supply interface on the collector; the host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module; the antenna module is connected with the power supply interface; the antenna module comprises a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, and the compensated power supply current is used for supplying power to the antenna.
The embodiment of the invention also provides a Beidou remote electric meter reading system, which comprises: the split type Beidou data transmission terminal, the collector, the master station server, the Beidou director and the Beidou master control front-end processor are characterized in that one end of the Beidou master control front-end processor is connected with the Beidou mobile director, and the other end of the Beidou master control front-end processor is connected with the master station server; the collector is connected with the split type Beidou data transmission terminal and used for collecting electric meter data and sending the electric meter data to the split type Beidou data transmission terminal; and the split type Beidou data transmission terminal is used for uploading ammeter data to the master station server through the Beidou director and the Beidou master control front-end processor.
Compared with the prior art, the embodiment of the invention separates the original integrated Beidou all-in-one machine into two mutually independent modules, namely the split Beidou data transmission terminal in the embodiment of the invention, the host module is independent of the antenna module, and the host module is provided with a power supply interface for being connected with the power supply interface on the collector, so that the power supply interface of the collector can supply power to the host module, and the normal work of the host module is facilitated. The antenna module is connected with the power supply interface, so that the power supply interface of the collector can supply power to the antenna module at the same time. The host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module, so that the electric meter data can be sent out through the antenna module. The antenna module comprises a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, is favorable for increasing the power supply current acquired from the power supply interface, supplies power to the antenna by the compensated power supply current, and is favorable for increasing the transmitting power of the antenna by the increased power supply current, so that the transmitting power of the antenna can be met even by using a smaller power supply provided by the collector, and meanwhile, the smaller power supply is also favorable for reducing the power consumption. In the embodiment of the invention, the Beidou first-generation all-in-one machine is divided to replace a GPRS module which is originally inserted on a collector, so that the data transmission blind area of a GPRS network-free area is solved, and the technical specification of a southern power grid and a national power grid to power equipment is favorably met.
In addition, the radio frequency filter circuit is specifically a first radio frequency filter combiner circuit; the radio frequency circuit specifically includes: first low noise amplifier LNA and second LNA, the input of first LNA and second LNA all is connected with the antenna, and first radio frequency signal specifically includes: positioning signals and S frequency point signals of RDSS; the output end of the first LNA is connected with the first input end of the first radio frequency filtering and combining circuit and is used for carrying out low-noise amplification on the positioning signal and sending the amplified positioning signal to the first radio frequency filtering and combining circuit; the output end of the second LNA is connected with the second input end of the first radio frequency filtering and combining circuit and is used for carrying out low-noise amplification on the S frequency point signal; the first radio frequency filtering combiner circuit is used for providing a transmission channel for the multi-channel signals and filtering clutter from the multi-channel signals; the multipath signal includes: the positioning signal, the S frequency point signal and the second radio frequency signal from the host module. The multiple signals can be transmitted and filtered through the first radio frequency filtering and combining circuit, namely, the multiple signals adopt one transmission channel, so that the resource utilization rate is improved.
In addition, the current compensation circuit specifically includes: a super capacitor charging circuit and a super capacitor; the input end of the super capacitor charging circuit is connected with the power supply interface on the collector, and the output end of the super capacitor charging circuit is connected with the input end of the super capacitor and used for charging the super capacitor; and the super capacitor is used for instantaneously discharging to compensate the power supply current when the electric meter data is transmitted through the antenna. The power supply current is compensated through instantaneous discharge of the super capacitor, the super capacitor is fully charged for only a few seconds, and the general transmission time interval is not less than 1 minute, so that the transmission power of the antenna is favorably met.
In addition, the super capacitor charging circuit is specifically used for charging the super capacitor after the super capacitor finishes discharging each time. The charging is carried out after the discharging is finished each time, so that the electric quantity can be stored for the next discharging in time.
In addition, the host module further includes: a Bluetooth module; the Bluetooth module is connected with the MCU and used for inquiring the running state of the host module through the MCU and sending the inquired running state to the Bluetooth equipment for inspection. The running state of each module in the host computer is patrolled and examined through the bluetooth, has made things convenient for patrolling and examining personnel's detection.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a split-type Beidou data transmission terminal according to a first embodiment of the invention;
fig. 2 is a schematic structural diagram of an antenna module in a split-type big dipper data transmission terminal according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an antenna module in a split-type big dipper data transmission terminal according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a host module in a split-type big dipper data transmission terminal according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of power supply in a host module in a split-type big dipper data transmission terminal according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a split-type big dipper data transmission terminal according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a Beidou remote electric meter reading system according to a fifth embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, even without these technical details and based on the following.
The first embodiment of the invention relates to a split type Beidou data transmission terminal. The core of this embodiment is that it includes: the host module is independent from the antenna module, and is provided with a power supply interface for being connected with a power supply interface on the collector; the host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module; the antenna module is connected with the power supply interface; the antenna module comprises a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, and the compensated power supply current is used for supplying power to the antenna. The electric power data transmission blind area of the GPRS non-network area is solved, manual meter reading is not needed even in remote areas, manpower and material resources are saved, and meanwhile, the power consumption is reduced. The implementation details of the split-type Beidou data transmission terminal of the embodiment are specifically described below, and the following description is only provided for facilitating understanding and is not necessary for implementing the scheme.
The structural schematic diagram of split type big dipper data transmission terminal in this embodiment, as shown in fig. 1, specifically include: the main machine module 101 and the antenna module 102 are independent from each other, the main machine module 101 and the antenna module 102 can be connected through a feeder line, the feeder line is a cable, and is a special cable customized according to the requirement of a product. The cable can transmit multiple radio frequency signals, and is also responsible for transmitting a power supply provided by the power supply interface of the collector to the antenna module 102 through the cable to supply power to the antenna module 102. That is, the power supply provided by the collector may be transmitted to the antenna module 102 through the cable to supply power to the antenna module 102. The radio frequency signal transmitted on the cable can be 3 paths, which are respectively: the antenna comprises S frequency point signals, L frequency point signals and B1/L1 frequency point signals, wherein the S frequency point is a downlink frequency of Beidou RDSS, the L frequency point is an uplink frequency, B1 is a civil frequency point of Beidou RNSS, and L1 is a civil frequency point of GPS. In the present embodiment, the RDSS provides a Radio short message transceiving Service based on the beidou Satellite system. In this embodiment, the RNSS provides a dual-mode Satellite positioning service based on a beidou Satellite and a GPS Satellite.
The host module 101 is provided with a power interface for connecting with a power supply interface on the collector, the power supply interface of the collector can provide 5V 1.5 amax power, and both the host module 101 and the antenna module 102 can use 5V 1.5 amax power for power supply. The host module 101 is connected to the antenna module 102, and is configured to receive the meter data sent by the collector, and transmit the meter data to the antenna module 102 through the radio frequency cable. The communication interface on the collector may be an RS485 interface or an ethernet interface, and the corresponding host module 101 may be provided with a corresponding interface circuit, for example, the interface circuit may be an RS485 interface circuit or an ethernet interface circuit, which is used to implement data transmission between the collector and the host module 101, and the communication interface on the collector in fig. 1 takes RS485 as an example, but is not limited in practical application. For example, the meter data collected by the collector is transmitted to the host module 101 through the interface circuit, and the host module 102 may send an instruction for recalling and reading the meter data to the collector.
The antenna module 102 is also connected to the power supply interface, in practical applications, the electric quantity of 5V 1.5 amax provided by the power supply interface may be transmitted to the antenna module 102 through a cable, and the antenna module 102 may include a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, and the compensated power supply current is used for supplying power to the antenna. The current compensation circuit performs compensation processing on the supply current, namely, the obtained supply current is increased, so that the antenna obtains larger supply current to meet the transmission power of the antenna when transmitting signals, and the antenna can receive RDSS signals and RNSS (B1+ L1) signals and transmit RDSS signals.
Compared with the prior art, the split Beidou data transmission terminal has the advantages that the original integrated Beidou all-in-one machine is split into two mutually independent modules, namely the split Beidou data transmission terminal in the embodiment of the invention, the host module is independent of the antenna module, and the host module is provided with the power supply interface for being connected with the power supply interface on the collector, so that the power supply interface of the collector can supply power for the host module, and the normal work of the host module is facilitated. The antenna module is connected with the power supply interface, so that the power supply interface of the collector can supply power to the antenna module at the same time. The host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module, so that the electric meter data can be sent out through the antenna module. The antenna module comprises a current compensation circuit and an antenna; the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, is favorable for increasing the power supply current acquired from the power supply interface, supplies power to the antenna by the compensated power supply current, and is favorable for increasing the transmitting power of the antenna by the increased power supply current, so that the transmitting power of the antenna can be met even by using a smaller power supply provided by the collector, and meanwhile, the smaller power supply is also favorable for reducing the power consumption. In the embodiment of the invention, the Beidou first-generation all-in-one machine is divided to replace a GPRS module which is originally inserted on a collector, so that the data transmission blind area of a GPRS network-free area is solved, and the technical specification of a southern power grid and a national power grid to power equipment is favorably met.
The second embodiment of the invention relates to a split type Beidou data transmission terminal. The second embodiment is a further improvement of the first embodiment, and the main improvements are as follows: in a second embodiment of the present invention, the antenna module further includes: the voltage reduction circuit, the radio frequency circuit and the radio frequency filter circuit are beneficial to supplying power to the radio frequency circuit by utilizing the power supply interface provided by the collector, so that signals received by the antenna can be filtered through the radio frequency circuit and the radio frequency filter circuit and then sent back to the host module.
The structural schematic diagram of the antenna module in the split-type big dipper data transmission terminal in this embodiment, as shown in fig. 2, specifically include: the circuit comprises a current compensation circuit 201, a power amplifier circuit 202, an antenna 203, a voltage reduction circuit 204, a radio frequency circuit 205 and a radio frequency filter circuit 206.
The input end of the voltage reduction circuit 204 is connected with the power supply interface on the collector, the output end is connected with the input end 2 of the radio frequency circuit 205, and the voltage reduction circuit is used for reducing the power supply voltage 5V obtained from the power supply interface to the standard power supply voltage 3.3V of the radio frequency circuit 114, the radio frequency circuit 205 is powered by using 3.3V, and the voltage reduction circuit can be realized by using a low dropout regulator (LDO).
The input end 1 of the rf circuit 205 is connected to the antenna, and the output end is connected to the input end 1 of the rf filter circuit 206, and is configured to receive the first rf signal transmitted through the antenna 203, and transmit the first rf signal to the rf filter circuit 206, so that the rf filter circuit 206 filters noise of the first rf signal.
The output end of the rf filter circuit 206 is connected to the host module 101, and is configured to send the first rf signal with noise being filtered out to the host module 101. It should be noted that, in this embodiment, the port 2 of the rf filter circuit 206 may serve as an input port, receive the second rf signal from the host module 101, perform filtering processing on the second rf signal, and send the second rf signal to the power amplifier circuit 202 through the input port 2 of the power amplifier circuit 202, or serve as an output port for sending the first rf signal to the host module 101.
The input end of the current compensation circuit 201 receives the power supply transmitted by the power supply interface through a cable, the output end is connected with the input end 1 of the power amplifier circuit 202, and the output end of the power amplifier circuit 202 is connected with the antenna 203. The current compensation circuit 201 can output 5V 3.5AMAX instantaneous large current after compensating the power supply current, and then the power amplification circuit 202 amplifies the power, which is favorable for meeting the transmitting power of the antenna when transmitting signals. The power amplifier circuit 202 is a power amplifier circuit of a Beidou RDSS sending channel, and a circuit for increasing power of a second radio-frequency signal after the host module is decoded and sending the second radio-frequency signal out through an antenna.
Compared with the prior art, the power supply interface provided by the collector is favorable for supplying power to the radio frequency circuit, so that the signals received by the antenna can be filtered through the radio frequency circuit and the radio frequency filter circuit and then sent back to the host module, and the transmission power of the antenna when the signals are transmitted can be favorably met through the processing of the current compensation circuit and the power amplifier circuit.
The third embodiment of the invention relates to a split type Beidou data transmission terminal. The third embodiment is a further improvement of the second embodiment, and the main improvements are as follows: the current compensation circuit specifically includes: a super capacitor charging circuit and a super capacitor; the instantaneous discharge of the super capacitor is used for compensating the power supply current, so that the emission power of the antenna can be met.
The structural schematic diagram of the antenna module in the split-type big dipper data transmission terminal in this embodiment, as shown in fig. 3, specifically include: current compensation circuit 201, power amplifier circuit 202, antenna 203, step-down circuit 204, radio frequency circuit 205 and first radio frequency filter circuit combiner 306, current compensation circuit 201 specifically includes: super capacitor charging circuit 301, super capacitor 302, first voltage converter 303, power detector 304. The rf circuit 205 specifically includes: a first LNA307 and a second LNA 308. The power supply of the power supply interface of the collector through cable transmission can be respectively the voltage reduction circuit 204, the first radio frequency filtering and combining circuit 306 and the super capacitor charging circuit 301.
The rf circuit 205 specifically includes: the first low noise amplifier LNA307 and the second LNA308, the input 2 of the first LNA307 and the second LNA308 are both connected to the antenna 203, and the first radio frequency signal specifically includes: positioning signals and S frequency point signals of RDSS. Low noise amplifiers, which are amplifiers with very low noise figure, are generally used as high frequency or intermediate frequency preamplifiers for various radio receivers. Signals received by the high-frequency radio equipment need the LNA to amplify the signals and transmit the amplified signals to the back end for analysis. The positioning signal may be a positioning signal of a beidou navigation satellite system or a positioning signal of a GPS navigation satellite system received by the antenna 203, i.e. the first LNA307 is referred to receive a positioning signal of a beidou navigation satellite system or a positioning signal of a GPS navigation satellite system. The second LNA308 is referred to as the LNA low noise amplifier at the big dipper RDSS receiver.
The input terminal of the voltage-reducing circuit 204 is connected to the 5V power supply, the output terminal 1 is connected to the input terminal 1 of the first LNA307, and the output terminal 2 is connected to the input terminal 1 of the second LNA 308. The LNAs of the two rf signals of the first LNA307 and the second LNA308 both require precise 3.3V power, so a precise LDO buck circuit 204 power scheme is adopted for buck power supply. In practical applications, the step-down circuit 204 may be a low dropout regulator LDO, and may accurately reduce the voltage of 5V to 3.3V output to power the first LNA307 and the second LNA 308.
The first radio frequency filtering and combining circuit 306 is used for providing a transmission channel for the multiple signals and filtering clutter from the multiple signals; the multipath signal includes: the positioning signal, the S frequency point signal and a second radio frequency signal from the host module, wherein the second radio frequency signal is a signal of an RDSS sending terminal.
An input end 3 of the first radio frequency filtering and combining circuit 306 is connected with a power supply interface on the collector to obtain a power supply, and simultaneously receives a second radio frequency signal sent by the host module 101, and an output end 1 is connected with an input end 1 of the power amplifier circuit 202 and is used for filtering the second radio frequency signal from the host module 101 and then sending the second radio frequency signal to the power amplifier circuit 202; the output 2 of the first rf filter circuit 306 is connected to the input of the power detector 304, and is used for transmitting the target transmission power from the host module 101 to the power detector 304; the host module 101 may analyze and calculate the signal strength when receiving the S frequency point signal of the RDSS, calculate the required target transmission power according to the signal strength, and send the calculated target transmission power to the first radio frequency filtering and combining circuit 306 through the cable.
The output end 1 of the power detector 304 is connected with the input end 2 of the power amplifier circuit 202, and is used for sending the received target transmitting power to the power amplifier circuit 202; an input end 1 of the first voltage converter 303 is connected with an output end of the super capacitor 302, an input end 2 is connected with an output end 2 of the power detector 304, and is used for receiving target transmitting power from the power detector 304 and converting voltage and current output by the super capacitor into voltage and current meeting the target transmitting power, and an output end of the first voltage converter 303 is connected with an input end 3 of the power amplifier circuit 202 and is used for sending the voltage and current meeting the target transmitting power to the power amplifier circuit 202 so that the power amplifier circuit 202 can output the target transmitting power; the antenna 203 is connected to the output end of the power amplifier circuit 202, and is configured to transmit a second radio frequency signal according to the target transmission power output by the power amplifier circuit 202. The first voltage converter 303 may be a DC/DC converter, and the DC/DC converter effectively outputs a fixed voltage after converting an input voltage, and in order to ensure accurate and efficient instantaneous discharge of the super capacitor 302 to the power amplifier circuit 202, reduce circuit loss and reduce ripples, a chip-level DC/DC converter is specially added to ensure power supply efficiency and power supply cleanliness.
The input end of the super capacitor charging circuit 301 is connected with the power supply interface on the collector, and the output end is connected with the input end of the super capacitor 302, and is used for charging the super capacitor 302. In practical applications, the input terminal of the super capacitor charging circuit 301 may be connected to a cable, and the power supply transmitted from the cable. A super capacitor 302 for instantaneously discharging to compensate for the supply current when transmitting meter data through the antenna. The super capacitor adopted by the implementation mode can be a type that 5V-3.5A instantaneous discharge can last 120ms, the super capacitor is fully charged and almost takes several seconds, and the transmission time interval of RDSS is generally not less than 1 minute, so that the transmitted signal is instantaneous discharge to meet the transmission power of the antenna.
Preferably, the super capacitor charging circuit 301 charges the super capacitor 302 after the super capacitor 302 finishes discharging each time, and charges the super capacitor 302 after the super capacitor 302 finishes discharging each time, which is beneficial to timely storing electric quantity for next discharging.
Compared with the prior art, the implementation mode of the invention compensates the power supply current through the instant discharge of the super capacitor, the super capacitor is fully charged only for several seconds, and the general transmission interval time is 1 minute, thereby being beneficial to meeting the transmission power of the antenna. The charging is carried out after the discharging is finished each time, so that the electric quantity can be stored for the next discharging in time. The multiple signals can be transmitted and filtered by the radio frequency filtering and combining circuit, namely, the multiple signals adopt one transmission channel, so that the resource utilization rate is improved.
The fourth embodiment of the invention relates to a split type Beidou data transmission terminal. The fourth embodiment is a further improvement of the third embodiment, and the main improvements are as follows: in a fourth embodiment of the present invention, a host module specifically includes: the device comprises an interface circuit, a microprocessor MCU, an RDSS baseband radio frequency transceiver circuit, an RNSS module, a second radio frequency filter circuit and a Bluetooth module.
The structural schematic diagram of the host module in the split type big dipper data transmission terminal in this embodiment, as shown in fig. 4, specifically include: the radio frequency filter comprises a power interface 401, an interface circuit 402, an MCU403, an RDSS baseband radio frequency transceiver circuit 404, an RNSS module 405, a second radio frequency filter combiner circuit 406 and a Bluetooth module 407.
In this embodiment, the MCU403 and each module connected thereto are connected in two ways, and the MCU403 and each module can communicate data therein via the UART. The data interaction between the MCU403 and the collector may be: the collector transmits data to the MCU403 in the host module 101 through the interface circuit 402, and then transmits the electric meter data to the master station through the antenna, or the master station transmits a reading instruction to the MCU403 through the antenna, the MCU403 transmits the reading instruction to the collector through the interface circuit 402, and the collector starts to collect the electric meter data and then reports the electric meter data.
The RNSS module 405 is connected to the MCU403, and is configured to position the collector and send a positioning signal of the collector to the MCU 403; the RNSS module 405 itself can perform satellite positioning, and the MCU403 can send a positioning instruction to the RNSS module 405 to determine when the RNSS module 405 needs positioning and send out the positioning data. Meter-level positioning and high-precision time service functions can be realized through the RNSS module, and positioning and time service information is uploaded to a meter reading terminal through a serial port and is simultaneously uploaded to a master station through the RDSS baseband radio frequency transceiver circuit 404.
The MCU403 is connected with the beidou RDSS baseband radio frequency transceiver circuit 404, and is configured to receive the electric meter data sent by the collector through the interface circuit 402, and send the electric meter data and the positioning signal to the beidou RDSS baseband radio frequency transceiver circuit 404; the Beidou RDSS baseband radio frequency transceiver circuit 404 is used for converting the received data into a second radio frequency signal and sending the second radio frequency signal to the second radio frequency filtering and combining circuit 406; the Beidou RDSS baseband radio frequency transceiver circuit 404 specifically encodes the received data, so that the host module 101 can encode and transmit the data required to be transmitted by itself through a baseband. The Beidou RDSS baseband radio frequency transceiver circuit 404 is further configured to receive an S frequency point signal of the RDSS from the antenna 203, analyze the S frequency point signal and send the analyzed S frequency point signal to the MCU 403; the MCU403 is further configured to calculate a target transmission power according to the signal strength of the analyzed S-frequency point signal, and send the target transmission power to the antenna module 102 through the radio frequency cable, so that an antenna in the antenna module 102 transmits a received second radio frequency signal according to the target transmission power. The RDSS baseband radio frequency transceiver circuit 404 can realize data transmission functions such as remote communication, remote control, tariff table updating and the like.
The second rf filtering and combining circuit 406 is configured to filter a clutter of the second rf signal, and send the second rf signal with the filtered clutter to the antenna module 102, where the first rf filtering and combining circuit 306 in the antenna module 102 may filter the received second rf signal again, eliminate an incoherent electromagnetic signal in the second rf signal transmitted through a cable, and further ensure the purity of the second rf signal.
The bluetooth module 407 is connected with the MCU403, and is used for inquiring the running state of the host module 101 through the MCU403, and sending the inquired running state to the bluetooth device for inspection, and the bluetooth device can be an intelligent terminal with bluetooth function such as a mobile phone and a tablet computer, and the inspection personnel can perform bluetooth inspection on other modules in the host module through the bluetooth function of the mobile phone to monitor the running state of the host module. MCU and big dipper baseband in can also upgrading through bluetooth module 407.
Preferably, in this embodiment, when an abnormal event occurs in each module, the abnormal event may be reported in good time without intervention of an upper computer, including a power state, and each module may also implement encryption of transmission data, thereby ensuring privacy of data communication.
In the following, the power supply of each module in the host module 101 in the present embodiment is described, and as shown in fig. 5, the power supply specifically includes:
the input of the second voltage converter 501 is connected to the power interface 401 to obtain 5V, and the voltage of 5V is reduced to 3.8V. The second voltage converter 501 is used for voltage reduction in advance, which is beneficial to reducing power supply ripples. The input end of the first LDO503 is connected to the output end 1 of the second voltage converter 501, the output end 1 is connected to the input end 1 of the RDSS baseband rf transceiver circuit 404, the output end 2 is connected to the input end of the second LDO502, the output end of the second LDO is connected to the input end 2 of the RDSS baseband rf transceiver circuit 404, and the first LDO503 and the second LDO502 reduce the output voltage of the second voltage converter 501 to the standard supply voltage of the RDSS baseband rf transceiver circuit 404 to supply power to the RDSS baseband rf transceiver circuit 404.
The input end of the third LDO504 is connected to the output end 2 of the second voltage converter 501, and the output end is connected to the MCU403, so as to reduce the output voltage of the second voltage converter 501 to the standard supply voltage of the MCU403, i.e., 3.3V, and supply power to the MCU 403.
The input end of the fourth LDO505 is connected to the output end 3 of the second voltage converter 501, and the output end is connected to the RNSS module 405, so as to reduce the output voltage of the second voltage converter 501 to the standard supply voltage of the RNSS module 405, that is, 3.3V, and supply power to the RNSS module 405.
The input end of the fifth LDO506 is connected to the output end 4 of the second voltage converter 501, and the output end is connected to the bluetooth module 407, so as to reduce the output voltage of the second voltage converter 501 to the standard supply voltage of the bluetooth module 407, i.e. 3.3V, and supply power to the bluetooth module 407.
Five LDOs in this embodiment can choose the chip that has the enable end for use, and the enable end switch through MCU403 control LDO cuts off the partial power that will not use during the standby to be favorable to reducing the total power consumption of system.
In this embodiment, split type big dipper data transmission terminal by: the host module 101 and the antenna module 102 are connected by a radio frequency cable, and a schematic structural diagram thereof is shown in fig. 6.
Compared with the prior art, in this embodiment, each submodule piece in the host module can all adopt the power supply that the collector provided to supply power, current big dipper all-in-one needs independent power supply, and independent supply voltage is great, therefore the consumption is great, and in this embodiment, need not independent power supply, only utilize the power supply that original collector provided to supply power, not only can be with the original interface make full use of collector, can also make and reduce holistic consumption because of the lower power supply of collector. Simultaneously, bluetooth module in this embodiment makes can patrol and examine the running state of each module in the host computer module through the bluetooth, has made things convenient for patrolling and examining personnel's detection.
A fifth embodiment of the present invention relates to a Beidou remote electric power meter reading system, as shown in fig. 7, including: the split type big dipper data transmission terminal 602, big dipper commander 603, big dipper master control front-end processor 604, the server 605 of main website of collector 601 foretell. The collector 601 is connected with the split type Beidou data transmission terminal 602 and is used for collecting electric meter data and sending the electric meter data to the split type Beidou data transmission terminal 602; and the split type Beidou data transmission terminal 602 is used for uploading the ammeter data to the master station server 605 through the Beidou director 603 and the Beidou master control front-end processor 604. One end of the big dipper master control front-end processor 604 is connected with the big dipper commander 603, and the other end is connected with the master station server 605; the Beidou commander 603 receives satellite transmission data and is connected with the Beidou main control front-end processor 604 through a serial port to realize data receiving; the big dipper master control front-end processor 604 transmits the collected data to the master station server 605 in the form of the southern power grid metering automation terminal uplink communication protocol through a 3G, 4G, wireless public network or private network.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (8)
1. The utility model provides a split type big dipper data transmission terminal which characterized in that includes: a host module and an antenna module, the host module being independent of the antenna module,
the host module is provided with a power supply interface which is used for being connected with a power supply interface on the collector;
the host module is connected with the antenna module and used for receiving the electric meter data sent by the collector and transmitting the electric meter data to the antenna module;
the antenna module is connected with the power supply interface; the antenna module comprises a current compensation circuit and an antenna;
the current compensation circuit is used for compensating the power supply current acquired from the power supply interface on the collector, and the antenna is powered by the power supply current subjected to compensation processing;
the current compensation circuit specifically includes: a super capacitor charging circuit and a super capacitor;
the input end of the super capacitor charging circuit is connected with the power supply interface on the collector, and the output end of the super capacitor charging circuit is connected with the input end of the super capacitor and used for charging the super capacitor;
the super capacitor is used for instantaneously discharging to compensate the power supply current when the electric meter data is transmitted through the antenna;
the antenna module further includes: power amplifier circuit and radio frequency filter circuit, the current compensation circuit still includes: a first voltage converter and a power detector;
the input end of the radio frequency filter circuit is connected with the power supply interface on the collector, the first output end of the radio frequency filter circuit is connected with the first input end of the power amplifier circuit, and the radio frequency filter circuit is used for filtering a second radio frequency signal from the host module and then sending the second radio frequency signal to the power amplifier circuit, wherein the second radio frequency signal is a signal converted based on electric meter data;
a second output end of the radio frequency filter circuit is connected with an input end of the power detector and is used for sending target transmitting power from the host module to the power detector;
the first output end of the power detector is connected with the second input end of the power amplifier circuit and used for sending the received target transmitting power to the power amplifier circuit;
the first input end of the first voltage converter is connected with the output end of the super capacitor, the second input end of the first voltage converter is connected with the second output end of the power detector, and the first voltage converter is used for receiving target transmission power from the power detector and converting the received voltage and current output by the super capacitor into voltage and current meeting the target transmission power,
the output end of the first voltage converter is connected with the third input end of the power amplifier circuit and used for sending the voltage and the current meeting the target transmitting power to the power amplifier circuit so that the power amplifier circuit can output the target transmitting power;
the antenna is connected with the output end of the power amplifier circuit and used for transmitting the second radio frequency signal according to the target transmitting power output by the power amplifier circuit.
2. The split Beidou data transmission terminal according to claim 1, wherein the antenna module further comprises: the voltage reduction circuit, the radio frequency circuit and the radio frequency filter circuit;
the input end of the voltage reduction circuit is connected with the power supply interface on the collector, the output end of the voltage reduction circuit is connected with the first input end of the radio frequency circuit, and the voltage reduction circuit is used for reducing the power supply voltage obtained from the power supply interface to the standard power supply voltage of the radio frequency circuit and supplying power to the radio frequency circuit by using the standard power supply voltage of the radio frequency circuit;
the second input end of the radio frequency circuit is connected with the antenna, the output end of the radio frequency circuit is connected with the first input end of the radio frequency filter circuit, and the radio frequency filter circuit is used for receiving a first radio frequency signal transmitted by the antenna and transmitting the first radio frequency signal to the radio frequency filter circuit so as to filter noise waves of the first radio frequency signal by the radio frequency filter circuit;
and the first output end of the radio frequency filter circuit is connected with the host module and used for sending the first radio frequency signal for filtering the clutter to the host module.
3. The split-type Beidou data transmission terminal according to claim 2, wherein the radio frequency filter circuit is specifically a first radio frequency filter combiner circuit; the radio frequency circuit specifically includes: the antenna comprises a first Low Noise Amplifier (LNA) and a second LNA, wherein the input ends of the first LNA and the second LNA are both connected with the antenna, and the first radio frequency signal specifically comprises: positioning signals and S frequency point signals of RDSS;
the output end of the first LNA is connected with the first input end of the radio frequency filtering and combining circuit and is used for carrying out low-noise amplification on the positioning signal and sending the amplified positioning signal to the first radio frequency filtering and combining circuit;
the output end of the second LNA is connected with the second input end of the radio frequency filtering and combining circuit and is used for carrying out low-noise amplification on the S frequency point signal and sending the amplified S frequency point signal to the first radio frequency filtering and combining circuit;
the first radio frequency filtering combiner circuit is used for providing a transmission channel for a plurality of paths of signals and filtering clutter of the plurality of paths of signals; the multipath signal comprises: the positioning signal, the S frequency point signal and a second radio frequency signal from the host module.
4. The split type Beidou data transmission terminal according to claim 1, wherein the super capacitor charging circuit is specifically configured to charge the super capacitor after each discharging of the super capacitor is completed.
5. The split type Beidou data transmission terminal according to claim 1, wherein the host module specifically comprises: the system comprises an interface circuit, a microprocessor MCU, a satellite radio positioning service RDSS baseband radio frequency transceiver circuit, a radio satellite navigation system RNSS module and a second radio frequency filtering combiner circuit;
the RNSS module is connected with the MCU and used for positioning the collector and sending a positioning signal of the collector to the MCU;
the MCU is connected with the RDSS baseband radio frequency transceiver circuit and is used for receiving the ammeter data sent by the collector through the interface circuit and sending the ammeter data and the positioning signal to the RDSS baseband radio frequency transceiver circuit;
the RDSS baseband radio frequency transceiver circuit is used for converting received data into a second radio frequency signal and sending the second radio frequency signal to the second radio frequency filtering and combining circuit;
the second radio frequency filtering and combining circuit is used for filtering clutter of the second radio frequency signal and sending the second radio frequency signal with the filtered clutter to the antenna module.
6. The split Beidou data transmission terminal according to claim 5, wherein the host module further comprises: the second voltage converter, the first low dropout regulator (LDO), the second LDO, the third LDO and the fourth LDO;
the input end of the second voltage converter is connected with the power interface and used for reducing the power supply voltage acquired from the power interface;
the input end of the first LDO is connected with the first output end of the second voltage converter, the first output end of the first LDO is connected with the first input end of the RDSS baseband radio frequency transceiver circuit, the second output end of the first LDO is connected with the input end of the second LDO, the output end of the second LDO is connected with the second input end of the RDSS baseband radio frequency transceiver circuit, and the first LDO and the second LDO are used for reducing the output voltage of the second voltage converter to the standard supply voltage of the RDSS baseband radio frequency transceiver circuit to supply power to the RDSS baseband radio frequency transceiver circuit;
the input end of the third LDO is connected with the second output end of the second voltage converter, and the output end of the third LDO is connected with the MCU, and the third LDO is used for reducing the output voltage of the second voltage converter to the standard power supply voltage of the MCU and supplying power to the MCU;
an input end of the fourth LDO is connected to a third output end of the second voltage converter, and an output end of the fourth LDO is connected to the RNSS module, and is configured to reduce an output voltage of the second voltage converter to a standard supply voltage of the RNSS module, so as to supply power to the RNSS module.
7. The split Beidou data transmission terminal according to claim 6, wherein the host module further comprises: a Bluetooth module:
the Bluetooth module is connected with the MCU and used for inquiring the running state of the host module through the MCU and sending the inquired running state to the Bluetooth equipment for inspection.
8. The utility model provides a big dipper remote electric power meter reading system which characterized in that includes: the split type Beidou data transmission terminal, the collector, the master station server, the Beidou commander and the Beidou master control front-end processor as claimed in claim 1, wherein one end of the Beidou master control front-end processor is connected with the Beidou mobile commander, and the other end of the Beidou master control front-end processor is connected with the master station server;
the collector is connected with the split Beidou data transmission terminal and used for collecting electric meter data and sending the electric meter data to the split Beidou data transmission terminal;
the split type Beidou data transmission terminal is used for uploading the ammeter data to the master station server through the Beidou director and the Beidou master control front-end processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811072760.8A CN109493582B (en) | 2018-09-14 | 2018-09-14 | Split type big dipper data transmission terminal and big dipper long-range electric power system of checking meter |
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| CN201811072760.8A CN109493582B (en) | 2018-09-14 | 2018-09-14 | Split type big dipper data transmission terminal and big dipper long-range electric power system of checking meter |
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| CN109493582B true CN109493582B (en) | 2021-12-17 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932741B (en) * | 2019-10-29 | 2022-03-22 | 深圳市有方科技股份有限公司 | Shared antenna module and shared antenna device |
| CN113078933B (en) * | 2020-01-03 | 2023-01-24 | 内蒙古龙图电气有限公司 | Networking type terminal controller based on Beidou satellite communication |
| CN111653080A (en) * | 2020-06-03 | 2020-09-11 | 贵州电网有限责任公司 | Data transmission method and device based on data line connection and communication terminal |
| CN111667680A (en) * | 2020-06-03 | 2020-09-15 | 贵州电网有限责任公司 | Data transmission method, RDSS communication terminal and storage medium |
| CN115001515A (en) * | 2022-07-11 | 2022-09-02 | 浙江同兴技术股份有限公司 | RS485 interface mobile communication sending module with positioning and voltage reduction functions |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308422A (en) * | 2000-02-07 | 2001-08-15 | 松下电器产业株式会社 | Radio communiation equipment and its emitted power controlling method |
| CN101408606A (en) * | 2008-11-26 | 2009-04-15 | 中国科学院上海技术物理研究所 | Multiple-mode positioning signal source system |
| CN101408610A (en) * | 2008-11-21 | 2009-04-15 | 哈尔滨工程大学 | Spread-spectrum radio live-saving device based on big dipper and life-saving signal processing method |
| CN203377380U (en) * | 2013-07-10 | 2014-01-01 | 无锡星融恒通科技有限公司 | Miniaturized Beidou satellite antenna and miniaturized portable communication terminal |
| CN104505599A (en) * | 2014-11-06 | 2015-04-08 | 上海海积信息科技股份有限公司 | Satellite navigation positioning antenna |
| CN104833992A (en) * | 2015-04-15 | 2015-08-12 | 华东师范大学 | RTK (Real-Time Kinematic) Beidou positioning system and method based on Beidou short message mode |
| CN204795020U (en) * | 2015-06-23 | 2015-11-18 | 江苏星宇芯联电子科技有限公司 | Emergency communication rescue terminal based on big dipper RDSS and bluetooth |
| CN204989484U (en) * | 2015-09-08 | 2016-01-20 | 江苏星宇芯联电子科技有限公司 | Multimode active antenna |
| CN107132412A (en) * | 2017-05-19 | 2017-09-05 | 泰斗微电子科技有限公司 | A kind of Beidou communication terminal and concentrator |
| CN107959523A (en) * | 2017-11-06 | 2018-04-24 | 北京智芯微电子科技有限公司 | Electric power Beidou communication system and communication means based on Beidou communication technology |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2418992B (en) * | 2004-10-06 | 2008-08-13 | Actaris Uk Ltd | Rechargeable powering system in an electricity meter |
| EP2222044B1 (en) * | 2009-02-19 | 2012-08-29 | Research In Motion Limited | Mobile wireless communications device with separate in-phase (I) and quadrature (Q) phase power amplification and power amplifier pre-distortion and IQ balance compensation |
| CN102364974A (en) * | 2011-10-12 | 2012-02-29 | 广州杰赛科技股份有限公司 | Anti-jamming and wireless environment monitoring wireless access point system and implementation method thereof |
| CN103048666A (en) * | 2012-12-07 | 2013-04-17 | 广州润芯信息技术有限公司 | Beidou satellite and GPS (global positioning system) double-passage radio frequency receiving machine |
-
2018
- 2018-09-14 CN CN201811072760.8A patent/CN109493582B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308422A (en) * | 2000-02-07 | 2001-08-15 | 松下电器产业株式会社 | Radio communiation equipment and its emitted power controlling method |
| CN101408610A (en) * | 2008-11-21 | 2009-04-15 | 哈尔滨工程大学 | Spread-spectrum radio live-saving device based on big dipper and life-saving signal processing method |
| CN101408606A (en) * | 2008-11-26 | 2009-04-15 | 中国科学院上海技术物理研究所 | Multiple-mode positioning signal source system |
| CN203377380U (en) * | 2013-07-10 | 2014-01-01 | 无锡星融恒通科技有限公司 | Miniaturized Beidou satellite antenna and miniaturized portable communication terminal |
| CN104505599A (en) * | 2014-11-06 | 2015-04-08 | 上海海积信息科技股份有限公司 | Satellite navigation positioning antenna |
| CN104833992A (en) * | 2015-04-15 | 2015-08-12 | 华东师范大学 | RTK (Real-Time Kinematic) Beidou positioning system and method based on Beidou short message mode |
| CN204795020U (en) * | 2015-06-23 | 2015-11-18 | 江苏星宇芯联电子科技有限公司 | Emergency communication rescue terminal based on big dipper RDSS and bluetooth |
| CN204989484U (en) * | 2015-09-08 | 2016-01-20 | 江苏星宇芯联电子科技有限公司 | Multimode active antenna |
| CN107132412A (en) * | 2017-05-19 | 2017-09-05 | 泰斗微电子科技有限公司 | A kind of Beidou communication terminal and concentrator |
| CN107959523A (en) * | 2017-11-06 | 2018-04-24 | 北京智芯微电子科技有限公司 | Electric power Beidou communication system and communication means based on Beidou communication technology |
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| Publication number | Publication date |
|---|---|
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