Repeater based on covered wire transmission

Abstract

The utility model discloses a repeater based on covered wire transmission in the technical field of communication. Comprising a box body and two lithium battery packs which are respectively arranged at the upper end and the lower end of the box body. The box body structure is composed of an upper box body and a lower cover plate, a covered wire circuit board is installed on a cavity supporting column structural part of the inner structure of the upper box body, the upper box body and the lower cover plate are tightly fixed through screws to form the box body, and two pairs of wire pressing columns, four function indicating lamps, a grounding column (containing a ventilation valve) and a power switch are installed on the upper box body. A groove is milled in the front face of the lower cover plate along the periphery, a waterproof and conductive sealing ring is installed in the groove, and an O-shaped hook is arranged on the back face of the lower cover plate. The beneficial effects of the utility model are that the device is bridged between two pieces of covered wire transmission equipment, the transmission distance can be extended by nearly one time, the problem that the communication distance of the covered wire transmission equipment is not enough in a complex field environment is solved, and the application range of the covered wire transmission equipment is expanded.

Description

Technical Field

[0001] The utility model relates to the field of wired transmission communication, in particular to a repeater based on multiplexed wire transmission. Background Art

[0002] In the field, communication equipment in complex environments widely uses double-wire to build wired transmission links to support voice and data transmission. Double-wire is generally composed of multiple copper or steel core metal wires with a diameter of 2.5mm and a polyvinyl chloride insulation protective layer. It has the advantages of high strength, extrusion resistance, cold resistance, good conductivity, reliable transmission, high safety, and convenient and fast laying. Since the double-wire is essentially a wired transmission conductor, it has a DC resistance characteristic. The DC resistance index is usually ≤150Ω / km, which has an attenuation effect on the amplitude of the transmission signal. The attenuation constant index is usually ≤1.9dB / km. The signal transmitted by the double-line is a signal with a certain spectrum range after modulation. The attenuation amplitude is mainly related to the transmission distance. The longer the transmission distance, the greater the attenuation of the signal amplitude. When the transmission distance reaches the critical point, the communication equipment cannot correctly demodulate the useful signal from the modulated signal, and bit errors will occur during the transmission process, and even cause signal interruption. Therefore, the transmission distance of the double-line transmission equipment is limited. When the transmission distance between two communication devices cannot meet the actual needs of users, a repeater based on double-line transmission provided by the utility model can be installed between two double-line communication nodes to extend the transmission distance, solve the problem of insufficient double-line transmission distance, and expand the application range of double-line transmission equipment. In addition, complex outdoor environments need to consider battery power supply, as well as equipment protection from rain and lightning strikes. Utility Model Content

[0003] 1) Functional Overview

[0004] The utility model provides a repeater based on double-wire transmission, which is connected to double-wire transmission equipment at both ends of the double-wire respectively, regenerates the double-wire remote transmission signal, and increases the double-wire transmission distance.

[0005] 2) Technical solution

[0006] To achieve the above purpose, the repeater provided by the utility model is composed of a box body and two lithium battery packs. The two lithium battery packs are respectively installed at the upper and lower ends of the box body and the middle box body to form a repeater. The box body structure is composed of an upper box body and a lower cover plate. The internal structure cavity pillar structure of the upper box body is installed with a double-wire circuit board. The upper box body and the lower cover plate are tightly fixed with screws to form a box body. Two pairs of pressure posts, four function indicator lights, a grounding post (containing a breathable valve), and a power switch are installed on the upper box body. A groove is milled along the periphery of the front of the lower cover plate. A waterproof and conductive sealing ring is installed in the groove. There is an "O"-shaped hook on the back of the lower cover plate. The double-wire circuit board is composed of a lightning protection circuit, a filter circuit, a remote signal interface processing circuit, an FPGA, a single-chip microcomputer, and a DC / DC circuit. The lithium battery pack is composed of a lithium battery, a voltage / current / temperature detection protection circuit, and a dual PMOS tube, and the outside is sealed with a metal shell.

[0007] Furthermore, the box body and the lithium battery sealed shell are made of aluminum, the metal surface of the box body is spray-painted in a color of GY05 brown-green, and the aluminum of the lithium battery sealed shell is electroplated in black.

[0008] Furthermore, the upper box body uses JD-1 type crimping posts, with a total of 2 pairs of crimping posts. The crimping posts are equipped with waterproof sealing rings. Each pair of crimping posts corresponds to one multiplexed wire remote transmission interface. The multiplexed wires are crimped on the crimping posts and connected to the remote multiplexed wire transmission equipment.

[0009] Furthermore, there are 4 integrated function indicator lights with waterproof rings and nuts on the upper box body, including the double-line remote transmission interface 1 synchronization indicator light, the double-line remote transmission interface 2 interface synchronization indicator light, the lithium battery pack 1 working indicator light, and the lithium battery pack 2 working indicator light, and the indicator light color is green.

[0010] Furthermore, the power switch of the upper box body is KN6A-202DM, and the signal line is connected to the two lithium battery packs after passing through the double-wire circuit board. The power switch has a locking device, which turns on the lithium battery pack power upward and turns off the lithium battery power downward.

[0011] Furthermore, the grounding post of the upper box body is LR8.656.113, and is connected to the ground with a good conductive wire to maintain an equipotential body with the ground. The grounding post has a built-in air valve, and the air valve is embedded with a waterproof and breathable membrane.

[0012] Furthermore, the upper box body wire pressing post, the function indicator light, the grounding post, the power switch and the double-wired circuit board are connected by wires.

[0013] Furthermore, the lithium battery pack structure is locked and connected to the box body through a bayonet device with a stop. In terms of signal connection, a gold-plated sheet embedded in the metal round hole at the end of the lithium battery pack is connected to the gold-plated metal rod at the end of the box body, and the signal includes power supply and control signal.

[0014] Furthermore, the output voltage of the lithium battery pack power supply is 12V, and the power is not less than 20W.

[0015] Furthermore, the model of the single-chip microcomputer selected for the double-line circuit board is GD32F103Tx, and the communication interface between the single-chip microcomputer and the lithium battery pack is I 2 C.

[0016] 3) Beneficial effects

[0017] The beneficial effects of the utility model are as follows: the utility model is connected across two double-line transmission devices, connected by double-line, and completes the data and voice transmission relay function, extending the transmission distance between the two double-line transmission devices by nearly 1 times, solving the problem of insufficient communication distance of double-line transmission devices in complex outdoor environments, and expanding the application scope of double-line transmission devices. In addition, considering that the equipment is used in harsh outdoor environments, the structural design and circuit design of the utility model fully consider the equipment's rainproof, electromagnetic interference-proof, and lightning-proof capabilities. At the same time, the self-checking capability of the repeater equipment is considered, and the working status of the repeater, including the power consumption information of the lithium battery, can be transmitted back to the user, which is convenient for the user to use and maintain the repeater. The user can monitor the power consumption of the repeater lithium battery pack in real time and remotely control the lithium battery working or sleep mode. Providing two lithium battery packs for power supply increases the power supply capacity of the repeater. When one of the lithium batteries is replaced, the other lithium battery can power the repeater without affecting the continued operation of the repeater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 , Repeater Application Diagram

[0019] Figure 2 , Repeater model diagram

[0020] Figure 3 , Repeater box model diagram

[0021] Figure 4 , Repeater box bottom cover "O" shaped hook diagram

[0022] Figure 5 , repeater double-wire circuit board, lithium battery pack circuit diagram illustration: 1-lithium battery pack; 2-box body; 20-upper box body; 21-lower cover; 22-locking device; 200-function indicator light; 201-wire pressing post; 202-grounding post; 203-power switch; 210-lower cover groove; 211-lower cover "O" shaped hook. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the above embodiments, such as "up", "down", "left", "right", "front", "back", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0024] The following is a detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings. The implementation of the utility model includes but is not limited to the following embodiments.

[0025] like Figure 1 As shown in the figure, an application example of a repeater is provided. The double-line transmission equipment is installed in the machine room or the outdoor tent. The repeater is connected between two double-line transmission equipment. The repeater works in the harsh outdoor environment, including the low-pressure environment of the plateau. The intermediate device is powered by a replaceable lithium battery. The specific implementation is as follows:

[0026] like Figure 2 As shown, the repeater provided by the utility model is composed of a box body and two lithium battery packs. The two lithium battery packs are respectively installed at the upper and lower ends of the box body and form a repeater with the middle box body.

[0027] The box body and lithium battery sealed shell are made of 3A21 (GB / T3880.3) high-strength rust-proof aluminum. The metal surface of the box body is sprayed with plastic, and the color is GY05 brown-green. The installation hole shall not be sprayed. The aluminum material of the lithium battery sealed shell is chemically electroplated to black. The repeater adopts the above process surface treatment, which makes the repeater have strong rainproof and corrosion resistance. The inner surface of the metal part is chemically nickel-plated AL / AP.NI-P15.II.Y, and the contact resistance between any two points is ≤5mΩ.

[0028] The box structure consists of an upper box body and a lower cover plate. The upper box body is equipped with a circuit board to be doubled. The internal structure cavity of the box body has four pillars with a height of 6 mm. The pillars have threaded holes with a hole diameter of Φ2.5. The four corners of the circuit board to be doubled are fixed to the pillars inside the box body with Φ2.5 screws. The opening size of the circuit board to be doubled is Φ3. During installation, a spring washer and a flat washer with a spring of Φ2.5 are used to fix and prevent shock. There are 6 threaded holes of Φ3 around the back of the upper box body, and 6 symmetrical holes are opened on the lower cover plate. The upper box body and the lower cover plate are fixed together with screws of Φ3 in the same way.

[0029] The upper box body is equipped with 2 pairs of wire pressing posts, 4 function indicator lights, 1 grounding post (containing a ventilation valve), and 1 power switch.

[0030] Furthermore, the crimping post adopts a JD-1 type crimping post, which includes a welding piece, a nut, a spring washer, a flat washer, a sealing ring, and an insulating pad. There are 4 openings on the front of the upper box body for installing the crimping post, and the diameter of the opening is Φ9. The spring washer, the flat washer, and the nut are used to fasten the crimping post to the box body; the sealing ring is mainly used for waterproofing; the insulating pad prevents the metal conductor of the crimping post from contacting the box body and affecting signal transmission; the welding piece is used to weld the wire so that the conductor of the crimping post is connected to the transmission signal of the circuit board inside the box body. After the crimping post is crimped to the double-wired wire, the double-wired wire is remotely connected to the remote double-wired transmission device, so that the intermediate device establishes a physical communication connection with the double-wired transmission devices at both ends.

[0031] Furthermore, the four device function indicators of the upper box body adopt an integrated design with a waterproof function, the working current is less than 10mA, and the indicator light color is green. The indicator light corresponds to the size of the upper box body opening directly Φ2. The four function indicator lights include the synchronization indicator light of the double-line transmission interface 1, the interface synchronization indicator light of the double-line transmission interface 2, the working indicator light of the lithium battery pack 1, and the working indicator light of the lithium battery pack 2. The double-line remote transmission interface indicator light is used to indicate whether the link with the remote double-line transmission device is connected normally. The normal connection indicator light is always on, and the unconnected indicator light is off. If the connection is unstable, the indicator light flashes; the lithium battery pack working indicator light is used to indicate the power of the lithium battery. When the lithium battery is not connected to the box body, the indicator light is off. When the power is 20% remaining, the indicator light flashes to warn, and when the power is greater than 20%, the indicator light is always on. Information such as the working status of the double-line remote transmission interface of the intermediate device and the power of the lithium battery pack can be transmitted to the remote double-line transmission device through the double line.

[0032] Furthermore, the power switch model is KN6A-202DM, and it has a locking device to prevent the power switch from being accidentally touched and changed in its working state. The power switch is used to control the output of the power of the lithium battery pack, and the switch state is sent to the single-chip microcomputer controller on the double-wired circuit board, and then the single-chip microcomputer controls the power output of the lithium battery pack to turn on and off.

[0033] Furthermore, the grounding column model is LR8.656.113, which has waterproof and breathable functions. The diameter of the opening of the upper box body is Φ4, which is used to fix the grounding column. The grounding column is made of round steel material, and a wire with good conductivity is connected to the ground to quickly discharge the current generated by lightning strikes to the ground. When the repeater is working, the electromagnetic interference signal is discharged to the ground to improve the stability and reliability of the equipment. The grounding column has a breathable valve function and is embedded with a waterproof and breathable membrane. It has both waterproof capabilities and keeps the repeater consistent with the ambient atmospheric pressure outside the machine, thereby improving the repeater's ability to adapt to low-pressure environments on the plateau.

[0034] Furthermore, the crimping post, function indicator light, power switch and the circuit board are connected by wires. The crimping post, function indicator light and power switch are welded and fixed on one side of the box body, and the other side of the wire must be connected to the socket of the circuit board with a connector plug.

[0035] A groove is milled along the periphery of the front of the lower cover plate, and a waterproof and conductive sealing ring is installed in the groove to improve the waterproof ability of the box body and ensure the overall conductivity of the box body. There is an "O"-shaped hook on the back of the lower cover plate, which is convenient for hanging the repeater in the field. There is a metal boss on the front of the lower cover plate, and a thermal pad is installed between the heat dissipation components of the circuit board to conduct the heat energy generated by the operation of the double-line circuit board to the structural box body, thereby improving the heat dissipation capacity of the equipment and improving the reliability of the equipment.

[0036] The double-wire circuit board is composed of a lightning protection circuit, a filter circuit, a remote signal interface processing circuit, an FPGA, a single-chip microcomputer, and a DC / DC circuit.

[0037] Furthermore, the lightning protection circuit is composed of a gas discharge tube, a varistor, and a TVS tube, which is used to connect the high-voltage current generated by lightning to the ground through the box body and the grounding column to avoid damaging the circuit board's rear-stage circuit; the filter circuit is composed of a common-mode coil, a through-hole capacitor, etc., to improve the electromagnetic compatibility of the repeater; the remote signal interface processing circuit uses PEF24628EV1X to complete the remote signal TC-PAM encoding and decoding and modulation and demodulation; the single-chip microcomputer uses GD32F103Tx to control and manage the FPGA, remote signal processing interface circuit, and lithium battery pack on the double-line circuit board, and communicate with the remote double-line transmission equipment, the working status of the transmission equipment, including the remote interface synchronization status, the lithium battery power status, and receive the control and management of the remote double-line communication equipment. The FPGA uses GW1N-UV9UG169C6 / I5 for digital signal logic processing and interface adaptation. The DC / DC uses CB4622B and SGM811-TXKA4 / TR to convert the input power supply voltage into +3.3V, +1.8V, and +1.2V power supply voltages.

[0038] Furthermore, the single chip microcomputer and the lithium battery pack are connected by I 2 C interface communication can control the power on and off of the lithium battery, and the lithium battery pack can report the power consumption.

[0039] The lithium battery pack is composed of a lithium battery, a voltage / current / temperature detection protection circuit, and a dual PMOS tube, and is sealed with a metal shell. The output voltage of the lithium battery power supply is 12V, and the power is not less than 20W. The voltage / current / temperature detection protection circuit uses DS2764, which is combined with a dual PMOS tube to turn on or off the output current of the lithium battery, and can detect the voltage, current, and operating temperature of the lithium battery and report it to the double-line microcontroller, which then reports it to the remote user.

[0040] The working principle is further explained below.

[0041] 1. The data and voice of the multi-line transmission equipment are uniformly converted into IP message format, and the control and maintenance information between the multi-line transmission equipment and the repeater is also converted into IP message format after being defined as a certain format.

[0042] 2. The double-line transmission equipment encapsulates the IP message into the Ethernet MAC frame, and then continues the HDLC encapsulation and sends it to the remote transmission interface chip circuit to complete the TC-PAM encoding. The filtering circuit and the lightning protection circuit ensure the anti-electromagnetic interference and lightning protection capabilities of the communication equipment. The double-line transmission is sent to the repeater, where it receives the modulated analog signal from the double-line and converts it into a digital signal, which is then converted into an analog signal and sent to the remote transmission interface line. After the analog signal is filtered and processed for electromagnetic interference prevention, it is sent to another pair of double-line lines to send the remote transmission signal to the double-line transmission equipment at the other end.

[0043] 3. After the remote transmission signal is received by the multi-line transmission equipment at the other end, TC-PAM decoding is performed to restore it to an Ethernet signal, and then the IP message is decoded to separate the data and voice signals.

[0044] 4. In the opposite direction, same as step 1.2.3.

[0045] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily found by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A repeater based on double-line transmission, characterized in that: Includes 1 box body and 2 lithium battery packs; Two lithium battery packs are respectively installed at the upper and lower ends of the box body and form a repeater with the middle box body; the box body structure is composed of an upper box body and a lower cover plate, the internal structure cavity pillar structure of the upper box body is installed with a double-wire circuit board, the upper box body and the lower cover plate are tightly fixed with screws to form a box body, 2 pairs of wire pressing posts, 4 function indicator lights, 1 grounding post (containing a breathable valve), and 1 power switch are installed on the upper box body, grooves are milled along the periphery of the front side of the lower cover plate, a waterproof and conductive sealing ring is installed in the groove, and an "O"-shaped hook is provided on the back side of the lower cover plate. The double-wire circuit board is composed of a lightning protection circuit, a filtering circuit, a remote signal interface processing circuit, an FPGA, a single-chip microcomputer, and a DC / DC circuit; the lithium battery pack is composed of a lithium battery, a voltage / current / temperature detection protection circuit, and a dual PMOS tube, and is sealed with a metal shell on the outside.

2. A repeater based on double-line transmission according to claim 1, characterized in that: The box body and the lithium battery sealed shell are made of aluminum. The metal surface of the box body is spray-painted in GY05 brown-green color, and the aluminum material of the lithium battery sealed shell is electroplated in black.

3. A repeater based on double-line transmission according to claim 1, characterized in that: The upper box body uses JD-1 type crimping posts, with a total of 2 pairs of crimping posts. The crimping posts are equipped with waterproof sealing rings. Each pair of crimping posts corresponds to one multiplexed wire remote transmission interface. The multiplexed wires are crimped on the crimping posts and connected to the remote multiplexed wire transmission equipment.

4. A repeater based on double-line transmission according to claim 1, characterized in that: There are 4 integrated function indicator lights with waterproof rings and nuts on the upper box body, including the double-line remote transmission interface 1 synchronization indicator light, the double-line remote transmission interface 2 interface synchronization indicator light, the lithium battery pack 1 working indicator light, and the lithium battery pack 2 working indicator light. The indicator light color is green.

5. A repeater based on double-line transmission according to claim 1, characterized in that: The power switch of the upper box body is KN6A-202DM. The signal line passes through the double-wired circuit board and then connects to the two lithium battery packs. The power switch has a locking device. It turns on the power of the lithium battery pack when it is turned upward and turns off the power of the lithium battery when it is turned downward.

6. A repeater based on double-line transmission according to claim 1, characterized in that: The grounding column of the upper box body is LR8.656.113, which is connected to the ground with a well-conductive wire to maintain an equipotential relationship with the ground; the grounding column has a built-in air valve, and the air valve is embedded with a waterproof and breathable membrane.

7. A repeater based on double-line transmission according to claim 1, characterized in that: The upper box body wire pressing column, the function indicator light, the grounding column, the power switch and the double-wired circuit board are connected by wires.

8. A repeater based on double-line transmission according to claim 1, characterized in that: The lithium battery pack is structurally locked and connected to the box body through a bayonet device with a stop. In terms of signal connection, a gold-plated sheet embedded in the metal round hole at the end of the lithium battery pack is connected to the gold-plated metal rod at the end of the box body. The signals include power supply and control signals.

9. A repeater based on double-line transmission according to claim 1, characterized in that: The output voltage of the lithium battery pack power supply is 12V and the power is not less than 20W.

10. A repeater based on double-line transmission according to claim 1, characterized in that: The model of the single-chip microcomputer selected for the double-line circuit board is GD32F103Tx, and the communication interface between the single-chip microcomputer and the lithium battery pack is I 2 C.

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