Indoor distribution signal detection device

Abstract

The utility model discloses an indoor distribution signal detection device, belongs to the technical field of indoor distribution, and aims to solve the problems that the service life of a power supply unit of an indoor distribution detector in the prior art is limited, so that the reporting frequency of equipment is limited, each indoor distribution detector needs to be equipped with a power supply unit, and the equipment cost and the maintenance cost are high. The utility model comprises a POE transmission module, the POE transmission module is respectively connected with a master control module and a 5G module in host equipment, and the master control module is connected with the 5G module and is respectively connected with an antenna through an antenna change-over switch. The problem of the service life of the power supply unit is solved through POE power supply, the reporting frequency of the equipment is not limited, and meanwhile, multiple pieces of equipment can be connected in series on the POE bus, so that the equipment cost and the maintenance cost are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of indoor distribution technology, and more specifically, to an indoor distribution signal detection device. Background Technology

[0002] Indoor distributed antenna systems (DAS) introduce base station signals into a room and distribute them evenly throughout every corner, ensuring ideal signal coverage and improving indoor communication quality. Detection of DAS signals is crucial for optimizing indoor DAS systems. Existing DAS detectors are typically battery-powered, but batteries have limited lifespans and their capacity decays over time. Therefore, low-power performance is critical, and to meet the equipment's lifespan requirements, the reporting frequency of DAS detectors is limited, usually reporting the detection signal once a day.

[0003] Chinese Patent Publication No. CN118117299B, published on July 26, 2024, entitled "An Antenna System with Automatic Indoor Distributed Airway Monitoring Function," discloses an antenna system with automatic indoor distributed airway monitoring function. This system includes a signal detector, an antenna main unit, a power supply unit, an antenna housing, and a base. The antenna housing and base are connected to form an installation space for accommodating the signal detector, antenna main unit, and power supply unit. The power supply unit supplies power to the signal detector and antenna main unit and can be charged via a feed line connected to the indoor distributed airway antenna. While this antenna system with automatic indoor distributed airway monitoring function, through the integration of a signal detector, can obtain antenna information from more dimensions and thus accurately determine the antenna signal status, the signal detector is powered by the power supply unit, which requires charging, has a limited lifespan, and each signal detector requires its own power supply unit, resulting in high equipment and maintenance costs. Utility Model Content

[0004] In view of the problems mentioned in the background art, such as the limited lifespan of the power supply unit of the indoor distributed antenna system detector, which leads to the limitation of the device's reporting frequency, and the high equipment cost and maintenance cost that each indoor distributed antenna system detector needs to be equipped with a power supply unit, this utility model provides an indoor distributed antenna system signal detection device. It solves the problem of the lifespan of the power supply unit by using POE power supply, and the device's reporting frequency is not limited. At the same time, multiple devices can be connected in series on the POE bus, which greatly reduces the equipment cost and maintenance cost.

[0005] To solve the aforementioned technical problems, this utility model adopts the following technical solution: an indoor distributed antenna system (DAS) signal detection device, comprising: a PoE transmission module, wherein the PoE transmission module is connected to the main control module and the 5G module in the host device respectively; the main control module and the 5G module are connected and respectively connected to antennas via antenna switching switches. PoE refers to a technology that transmits power through a network cable, and 5G refers to fifth-generation mobile communication technology. This utility model solves the problem of the lifespan of the power supply unit by using PoE power supply, the device reporting frequency is not limited, and multiple devices can be connected in series on the PoE bus, greatly reducing equipment costs and maintenance costs.

[0006] Preferably, the PoE transmission module includes an RJ45 module and a power conversion module U1. Pins 3 and 15 of the RJ45 module are connected to pin 1 of the power conversion module U1 via resistor R3, and pins 6 and 18 of the RJ45 module are connected to pin 2 of the power conversion module U1 via resistor R4. RJ45 refers to an information socket connector in a cabling system. Pins 3 and 15 of the RJ45 module are connected to one end of resistor R3, and pins 6 and 18 of the RJ45 module are connected to one end of resistor R4.

[0007] Preferably, pins 4 and 5, and pins 16 and 17 of the RJ45 module are connected to pin 3 of the power conversion module U1 via resistor R5, and pins 7 and 8, and pins 19 and 20 of the RJ45 module are connected to pin 4 of the power conversion module U1 via resistor R6. Pins 4 and 5, and pins 16 and 17 of the RJ45 module are connected together to one end of resistor R5, and pins 7 and 8, and pins 19 and 20 of the RJ45 module are connected together to one end of resistor R6.

[0008] Preferably, pins 1 and 13 of the RJ45 module are connected to the RS485 communication line B, which is equipped with a resistor R1. Pins 2 and 14 of the RJ45 module are connected to the RS485 communication line A, which is equipped with a resistor R2. The RS485 communication line A and line B refer to the two differential signal lines in the RS485 communication protocol. Pins 1 and 13 of the RJ45 module are connected to one end of resistor R1, and pins 2 and 14 of the RJ45 module are connected to one end of resistor R2.

[0009] Preferably, the PoE transmission module further includes a power conversion module U4, whose pin 1 and pin 6 are connected via a capacitor C6, and whose pin 6 is also connected to an inductor L1. The capacitor C6 serves as a bootstrap capacitor, and the inductor L1 is used for energy storage and filtering.

[0010] Preferably, pin 6 of power conversion module U1 is connected to pin 5 of power conversion module U4, and pin 5 of power conversion module U1 is grounded. This design further steps down the output voltage of power conversion module U1 via power conversion module U4.

[0011] Preferably, the main control module includes an NT26E module, and the 5G module includes an NR90 module. The NT26E module is a CAT1 wireless communication module, where CAT1 refers to a standard for user terminal categories, and the NR90 module is a lightweight 5G module.

[0012] Preferably, the main control module and the 5G module are connected via a UART serial port. UART stands for Universal Asynchronous Receiver / Transmitter.

[0013] Preferably, the main control module and the antenna switching switch are connected via a GPIO port. GPIO port refers to a general purpose input / output port.

[0014] Preferably, the host device connects several slave devices in series via network cables, which consist of a power cable and a RS485 communication cable. The RS485 communication cable refers to a communication line based on the RS485 communication protocol. This design significantly reduces equipment and maintenance costs.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) By powering the indoor signal detection device with POE, the problem of the lifespan of the power supply unit is solved, and the reporting frequency of the device is not limited; (2) The host device is connected in series with several slave devices through network cables, so that multiple devices can be connected in series on the POE bus. Each device can save the power supply unit such as lithium battery, which greatly reduces the equipment cost and maintenance cost; (3) The use of NT26E module and NR90 module makes the indoor signal detection device perform well and reliably. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the components of this utility model.

[0017] Figure 2 This is the POE power supply circuit diagram of this utility model.

[0018] Figure 3 This is the voltage drop circuit diagram of this utility model.

[0019] Figure 4 This is a schematic diagram of the overall connection of this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings.

[0021] Example:

[0022] like Figures 1 to 4 The illustrated indoor signal detection device includes a PoE transmission module connected to a host device. The host device comprises a main control module and a 5G module. The PoE transmission module is connected to both the main control module and the 5G module. PoE, or Power Over Ethernet, is a technology that transmits power over a network cable. 5G, or 5th Generation Mobile Communication Technology, refers to the fifth-generation mobile communication technology.

[0023] The main control module includes the NT26E module, which is a CAT1 wireless communication module. CAT1 stands for LTE UE-Category 1, a standard for user terminal categories under LTE networks. LTE stands for Long Term Evolution, and UE stands for User Equipment. CAT1 is positioned as a category for the Internet of Things (IoT) application market. The 5G module includes the NR90 module, which is a RedCap module. RedCap stands for Reduced Capability, meaning 5G is lightweight; therefore, the NR90 module is a lightweight 5G module.

[0024] The main control module and the 5G module are connected, specifically via a UART serial port. UART stands for Universal Asynchronous Receiver and Transmitter. The main control module and the 5G module are each connected to an antenna switching switch, which is connected to the antenna. The main control module connects to the antenna switching switch via a GPIO port for antenna switching control. GPIO stands for General Purpose Input / Output Port.

[0025] The external power supply voltage range for the PoE transmission module is 48±10V, which is processed by, for example... Figure 2 The PoE power supply circuit shown and as follows Figure 3The voltage drop circuit shown outputs 3.6V to power the main control module and the 5G module. The PoE transmission module is equipped with a RS485 communication line for inter-bus communication. The RS485 communication line is based on the RS485 communication protocol. The main control module is developed using OpenCPU, an embedded development solution that utilizes redundant threads in the module for logic development, reducing redundancy and waste of computing resources. The main control module can detect indoor LTE signals and read indoor 5G signals through the 5G module. When detecting indoor LTE signals, the main control module switches the antenna to the NT26E module via the GPIO port for antenna switch control; when reading indoor 5G signals, the main control module switches the antenna to the NR90 module via the GPIO port for antenna switch control. After detecting both indoor LTE and 5G signals, the main control module reports the detected signals to the corresponding server.

[0026] like Figure 2 As shown, the PoE transmission module includes an RJ45 module and a power conversion module U1. RJ45 refers to an information socket, i.e., a communication lead-out connector, in a cabling system. In this embodiment, the RJ45 module is a dual RJ45. The power conversion module U1 is model WC-PD13F050C. The power conversion module U1 is used to convert the 48±10V input power voltage to the 5V output voltage.

[0027] Pins 1 and 13 of the RJ45 module are connected to a 485 communication B line. A resistor R1 (10 ohms, 1206 package) is installed on this 485 communication B line. Pins 1 and 13 of the RJ45 module are connected to one end of resistor R1. Pins 2 and 14 of the RJ45 module are connected to a 485 communication A line. A resistor R2 (10 ohms, 1206 package) is installed on this 485 communication A line. Pins 2 and 14 of the RJ45 module are connected to one end of resistor R2. The aforementioned 485 communication A line and 485 communication B line refer to the two differential signal lines in the RS485 communication protocol. Resistors R1 and R2 are terminating resistors for the 485 communication line, used to match line impedance, reduce signal reflection, and improve communication quality.

[0028] Pins 3 and 15 of the RJ45 module are connected to one end of resistor R3, which is marked 0R / NC, indicating that resistor R3 can be either not installed or a 0-ohm resistor can be installed. In actual circuits, installation is optional as needed. The other end of resistor R3 is connected to pin 1 (VA1) of power conversion module U1. Pins 6 and 18 of the RJ45 module are connected to one end of resistor R4, which is marked 0R / NC, indicating that resistor R4 can be either not installed or a 0-ohm resistor can be installed. In actual circuits, installation is optional as needed. The other end of resistor R4 is connected to pin 2 (VA2) of power conversion module U1.

[0029] Pins 4, 5, 16, and 17 of the RJ45 module provide a PoE +48V voltage. These four pins are connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 3 (VB1) of the power conversion module U1. Pins 7, 8, 19, and 20 of the RJ45 module provide a PoE GND (Ground) voltage. These four pins are connected to one end of resistor R6, and the other end of resistor R6 is connected to pin 4 (VB2) of the power conversion module U1.

[0030] Pin 10 of the RJ45 module is connected to an LED to indicate the 485 communication status, and pin 24 is connected to another LED to indicate the power supply status, allowing users to easily observe the circuit's operating status. Pins 9, 23, 25, and 26 of the RJ45 module are grounded. Pins 11, 12, 21, and 22 of the RJ45 module are unused. Furthermore, pin 5 of the power conversion module U1 is grounded, and pin 6 of the power conversion module U1 outputs the converted 5V PoE voltage.

[0031] like Figure 2 The PoE power supply circuit shown integrates power conversion and 485 communication functions, providing a stable and reliable power supply and data transmission channel for the device.

[0032] like Figure 3 As shown, the POE transmission module also includes a power conversion module U4. In this embodiment, the power conversion module U4 is model SY8113IADC. The power conversion module U4 is used to convert the POE 5V voltage output from pin 6 of the power conversion module U1 to a 3.6V voltage, thereby powering the main control module and the 5G module.

[0033] Pin 5 (VIN) of power conversion module U4 is connected to pin 6 of power conversion module U1. This connection serves to further step down the output voltage of power conversion module U1 via power conversion module U4. Pin 5 of power conversion module U4 is connected to one end of capacitor C3, with the other end grounded. In this embodiment, capacitor C3 is a 100uF, 25V electrolytic capacitor used for input filtering, stabilizing the input voltage, and reducing input ripple. Pin 5 of power conversion module U4 is also connected to one end of capacitor C4, with the other end grounded. In this embodiment, capacitor C4 is a 10uF, 0603 packaged ceramic capacitor. Pin 5 of power conversion module U4 is also connected to one end of capacitor C5, with the other end grounded. In this embodiment, capacitor C5 is also a 10uF, 0603 packaged ceramic capacitor. The parallel connection of capacitors C4 and C5, close to pin 5 (VIN) of power conversion module U4, further filters out high-frequency noise and improves input stability.

[0034] Resistors R30 and R31 form a voltage divider, with one end of resistor R31 grounded. The midpoint of the voltage divider is connected to pin 4 of the power conversion module U4, used to set the voltage of pin 4 (EN pin) of the power conversion module U4. The voltage set by the voltage divider (R30 and R31) controls the start-up and shutdown of the power conversion module U4. When the voltage of pin 4 (EN pin) of the power conversion module U4 is higher than a threshold voltage, the power conversion module U4 starts up. In this embodiment, both resistors R30 and R31 are 100K resistors.

[0035] The first pin (BS pin) of the power conversion module U4 is connected to one end of capacitor C6, and the other end of capacitor C6 is connected to the sixth pin (LX pin) of the power conversion module U4. In this embodiment, capacitor C6 is a 0.1uF ceramic capacitor, which acts as a bootstrap capacitor to provide drive voltage for the internal high-bridge MOSFET. MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor. The sixth pin (LX pin) of the power conversion module U4 is also connected to one end of inductor L1. In this embodiment, inductor L1 is a 4.7uH, 2.5A, 4020 packaged inductor used for energy storage and filtering, converting the switching signal into a smoother DC output.

[0036] The third pin, FB pin, of the power conversion module U4 is connected to the output voltage divider network for regulating the output voltage. The output voltage divider network includes resistors R32 and R33. The midpoint of resistors R32 and R33 is connected to the third pin of the power conversion module U4. One end of resistor R33 is grounded. In this embodiment, resistor R32 is a 100K resistor with 1% precision, while resistor R33 is a 20K resistor with 1% precision. Both resistors, along with resistor R32, set the output voltage. Furthermore, capacitor C7 is connected in parallel across resistor R32. In this embodiment, capacitor C7 is marked 22pF / NC, indicating that capacitor C7 is a 22pF capacitor or is not used in the actual circuit. The second pin, GND pin, of the power conversion module U4 is grounded.

[0037] like Figure 3 The voltage drop circuit shown also includes several capacitors in its output section. The VBAT port is the circuit's 3.6V voltage output port, supplying power to the load. One end of capacitor C8 is grounded, and the other end is connected to the VBAT port. In this embodiment, capacitor C8 is a 10uF ceramic capacitor. One end of capacitor C9 is grounded, and the other end is connected to the VBAT port. In this embodiment, capacitor C9 is also a 10uF ceramic capacitor. Capacitors C8 and C9 are connected in parallel for output filtering, reducing output voltage ripple and improving output stability. One end of capacitor C10 is grounded, and the other end is connected to the VBAT port. In this embodiment, capacitor C10 is a 0.1uF ceramic capacitor, used to further filter out high-frequency noise.

[0038] like Figure 3 The voltage drop circuit shown is a DC-DC buck converter based on the SY8113IADC chip, capable of stably converting a 5V input voltage to a 3.6V output voltage to power the device. This voltage drop circuit utilizes synchronous rectification technology, resulting in high efficiency.

[0039] The PoE transmission module connects to the host device, which in turn connects several slave devices in series using network cables. These network cables include a power cable and a RS-485 communication cable. Devices can be configured as either host or slave, but only one host can operate on a single PoE bus. The wiring between devices is described as follows: The PoE transmission module connects to the host device via a network cable, with the RJ45 connector of the cable inserted into the first RJ45 socket of the host device. Another network cable connects the host device and slave device 1, with one RJ45 connector inserted into the second RJ45 socket of the host device and the other end inserted into the first RJ45 socket of slave device 1. Similarly, another network cable connects slave device 1 and slave device 2, with one RJ45 connector inserted into the second RJ45 socket of slave device 1 and the other end inserted into the first RJ45 socket of slave device 2, and so on, connecting the next slave device in series via network cables. In this embodiment, connecting one device every 5 meters allows for the connection of 100 devices. This design significantly reduces equipment and maintenance costs.

[0040] With the above connection method, multiple devices can be connected in series on the PoE bus. A master device is set on the bus, and the master device polls the slave devices, so that the slave devices work in turn. This can prevent multiple devices from working and reporting on the bus at the same time, which would cause the remote device to fail to work properly due to insufficient power supply voltage caused by energy line loss.

[0041] The indoor signal detection device described in this embodiment is powered by PoE, which solves the problem of the lifespan of the power supply unit. The device reporting frequency is not limited and can be set to report 24 times a day. Furthermore, the use of NT26E and NR90 modules makes the indoor signal detection device perform well and reliably. Moreover, the host device can be connected in series with several slave devices through network cables, so that multiple devices can be connected in series on the PoE bus. Each device can save on power supply units such as lithium batteries, which greatly reduces equipment costs and maintenance costs.

[0042] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An indoor signal detection device, characterized in that, include: A PoE transmission module, wherein the PoE transmission module is connected to the main control module and the 5G module in the host device respectively; The main control module and the 5G module are connected, and are respectively connected to the antenna via an antenna switching switch.

2. The indoor signal detection device according to claim 1, characterized in that, The PoE transmission module includes an RJ45 module and a power conversion module U1. The 3rd and 15th pins of the RJ45 module are connected to the 1st pin of the power conversion module U1 via resistor R3, and the 6th and 18th pins of the RJ45 module are connected to the 2nd pin of the power conversion module U1 via resistor R4.

3. The indoor signal detection device according to claim 2, characterized in that, Pins 4 and 5, as well as pins 16 and 17 of the RJ45 module, are connected to pin 3 of the power conversion module U1 via resistor R5. Pins 7 and 8, as well as pins 19 and 20 of the RJ45 module, are connected to pin 4 of the power conversion module U1 via resistor R6.

4. An indoor signal detection device according to claim 2 or 3, characterized in that, Pin 1 and pin 13 of the RJ45 module are connected to the 485 communication B line, and a resistor R1 is provided on the 485 communication B line. Pin 2 and pin 14 of the RJ45 module are connected to the 485 communication A line, and a resistor R2 is provided on the 485 communication A line.

5. The indoor signal detection device according to claim 2, characterized in that, The PoE transmission module also includes a power conversion module U4, the first and sixth pins of which are connected by a capacitor C6, and the sixth pin of which is also connected to an inductor L1.

6. The indoor signal detection device according to claim 5, characterized in that, The 6th pin of the power conversion module U1 is connected to the 5th pin of the power conversion module U4, and the 5th pin of the power conversion module U1 is grounded.

7. The indoor signal detection device according to claim 1, characterized in that, The main control module includes the NT26E module, and the 5G module includes the NR90 module.

8. An indoor signal detection device according to claim 1 or 7, characterized in that, The main control module and the 5G module are connected via a UART serial port.

9. An indoor signal detection device according to claim 1 or 7, characterized in that, The main control module and the antenna switching switch are connected via GPIO ports.

10. An indoor signal detection device according to claim 1 or 7, characterized in that, The host device connects several slave devices in series via a network cable, which consists of a power cable and a 485 communication cable.

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