Indoor distribution system fault monitoring device

Abstract

The utility model relates to the technical field of communication, and provides an indoor distribution system fault monitoring device, comprising an RFID gateway which comprises a radio frequency emission module and a radio frequency signal receiving circuit which are connected with a main control unit, and the radio frequency emission module is used for outputting a first radio frequency signal with a preset frequency; the first input end of the combiner is connected with the output end of the radio frequency transmitting module, the second end of the combiner is connected with an information source of the indoor distribution system, and the output end of the combiner is connected with a plurality of antennas of the indoor distribution system; the RFID tags are arranged on antennas of the indoor distribution system, and the RFID tags are used for receiving the first radio frequency signals output by the radio frequency transmitting module; the radio frequency signal receiving circuit is used for receiving a second radio frequency signal returned by each RFID tag; and the main control unit is used for detecting the link fault of the indoor distribution system based on the size of each second radio frequency signal. According to the technical scheme, the problem of difficulty in troubleshooting of the indoor distribution system in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and in particular to a fault monitoring device for an indoor distribution system. Background Art

[0002] The passive indoor distributed system consists of passive devices such as couplers, power dividers, combiners, cables, and antennas in addition to the signal source. The signal is transmitted through passive devices and distributed as evenly as possible to each antenna in each area of ​​the building through the feeder, thereby achieving uniform distribution of indoor signals. Due to the complex structure and many nodes of the passive indoor distributed system, when a fault occurs, the faulty node can only be checked step by step, which is a heavy workload. Utility Model Content

[0003] The utility model provides an indoor distribution system fault monitoring device, which solves the problem of difficulty in troubleshooting indoor distribution system faults in related technologies.

[0004] The technical solution of the utility model is as follows:

[0005] An indoor distribution system fault monitoring device includes an RFID gateway, a radio frequency transmitting module connected to a main control unit, and a radio frequency signal receiving circuit, wherein the radio frequency transmitting module is used to output a first radio frequency signal of a preset frequency;

[0006] A combiner, wherein a first input end of the combiner is connected to an output end of the radio frequency transmitting module, a second end of the combiner is connected to a signal source of the indoor distributed system, and an output end of the combiner is connected to a plurality of antennas of the indoor distributed system;

[0007] An RFID tag is arranged on each antenna of the indoor distribution system, and the RFID tag is used to receive a first radio frequency signal output by the radio frequency transmitting module;

[0008] The radio frequency signal receiving circuit is used to receive the second radio frequency signal returned by each RFID tag; the main control unit is used to detect the link failure of the indoor subsystem based on the size of each second radio frequency signal.

[0009] Furthermore, the indoor distribution system fault monitoring device also includes:

[0010] DTU device, one end of the DTU device is connected to the main control unit, and the other end is used to connect to the server.

[0011] Furthermore, the indoor distribution system fault monitoring device also includes:

[0012] A first power supply circuit, wherein an input end of the first power supply circuit is connected to an AC power supply, and an output end of the first power supply circuit is used to supply power to the RFID gateway;

[0013] A second power supply circuit, wherein an input end of the second power supply circuit is connected to an AC power supply, and an output end of the second power supply circuit is used to power the DTU device.

[0014] Furthermore, the RF signal receiving circuit includes multiple groups, one of which includes a multi-channel signal acquisition circuit, the output ends of the multiple signal acquisition circuits are respectively connected to multiple input ends of the RF switch, the control end of the RF switch is connected to the main control unit, the output end of the RF switch is connected to the input end of the AD conversion module, and the output end of the AD conversion module is connected to the main control unit.

[0015] Furthermore, the signal acquisition circuit includes a low-noise amplifier circuit and a filter circuit connected in sequence.

[0016] The working principle and beneficial effects of the utility model are:

[0017] In this embodiment, the indoor distributed system is composed of a signal source and multiple antennas. The signal of the radio frequency transmission module is connected to the indoor distributed system by setting a combiner, and RFID tags are set on each antenna of the indoor distributed system. The main control unit controls the radio frequency transmission module to output the first radio frequency signal regularly. After the first radio frequency signal is received by multiple RFID tags, the multiple RFID tags return the second radio frequency signal respectively. The second radio frequency signal is received by the radio frequency signal receiving circuit and sent to the main control unit. If there is a fault in the link of the indoor distributed system, the strength of the second radio frequency signal will be greatly reduced. Therefore, the main control unit can determine whether there is a fault in the link by detecting the size of each second radio frequency signal.

[0018] The utility model realizes real-time troubleshooting of room distribution system faults and reduces the workload of manual troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a principle block diagram of the indoor distribution system fault monitoring device of the utility model;

[0021] Figure 2 This is a circuit schematic diagram of the RFID gateway in the utility model;

[0022] Figure 3 This is a schematic diagram of a radio frequency signal receiving circuit in the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 2 As shown, this embodiment proposes an indoor distribution system fault monitoring device, including:

[0025] The RFID gateway includes a radio frequency transmitting module U3 and a radio frequency signal receiving circuit connected to the main control unit U2, wherein the radio frequency transmitting module U3 is used to output a first radio frequency signal of a preset frequency;

[0026] A combiner, wherein a first input end of the combiner is connected to an output end of the radio frequency transmission module U3, a second end of the combiner is connected to a signal source of the indoor distributed system, and an output end of the combiner is connected to multiple antennas of the indoor distributed system;

[0027] An RFID tag is arranged on each antenna of the indoor distributed system, and the RFID tag is used to receive the first radio frequency signal output by the radio frequency transmitting module U3;

[0028] The radio frequency signal receiving circuit is used to receive the second radio frequency signal returned by each RFID tag; the main control unit U2 is used to detect the link failure of the indoor subsystem based on the size of each second radio frequency signal.

[0029] In this embodiment, the indoor distributed system is composed of a signal source and multiple antennas. The signal of the RF transmission module U3 is connected to the indoor distributed system by setting a combiner, and RFID tags are set on each antenna of the indoor distributed system. The main control unit U2 controls the RF transmission module U3 to output the first RF signal regularly. After the first RF signal is received by multiple RFID tags, the multiple RFID tags return the second RF signal respectively. The second RF signal is received by the RF signal receiving circuit and sent to the main control unit U2. If there is a fault in the link of the indoor distributed system, the strength of the second RF signal will be greatly reduced. Therefore, the main control unit U2 can determine whether there is a fault in the link by detecting the size of each second RF signal.

[0030] It should be noted that, in this embodiment, both the first RF signal and the second RF signal use RF signals in the 840MHz~846MHz frequency band, which are separated from the signal frequency band of the indoor distribution system to avoid mutual influence between the signals.

[0031] Further, if Figure 2 As shown, the indoor distribution system fault monitoring device also includes:

[0032] DTU device U4, one end of the DTU device U4 is connected to the main control unit, and the other end is used to connect to the server.

[0033] In this embodiment, by setting up the DTU device U4, the second radio frequency signal and other data obtained by the main control unit can be sent to the server, and the server can display the data sent by the main control unit. In this way, the background management personnel can understand the working status of the link in real time without arriving at the site.

[0034] Further, if Figure 2 As shown, the indoor distribution system fault monitoring device also includes:

[0035] A first power circuit U6, where an input end of the first power circuit U6 is connected to an AC power source, and an output end of the first power circuit U6 is used to power the RFID gateway;

[0036] The second power circuit U5, the input end of the second power circuit U5 is connected to the AC power supply, and the output end of the second power circuit U5 is used to power the DTU device.

[0037] In this embodiment, the first power supply circuit is used to convert the 220V AC power supply into a 5V DC voltage to power the RFID gateway; the second power supply circuit is used to convert the 220V AC power supply into a 12V DC voltage to power the DTU device. The two power supplies are powered separately to ensure the reliable operation of the RFID gateway and the DTU device.

[0038] Further, if Figure 3 As shown, the RF signal receiving circuit includes multiple groups, one of which includes a multi-channel signal acquisition circuit, the output ends of the multi-channel signal acquisition circuit are respectively connected to multiple input ends of the RF switch U7, the control end of the RF switch U7 is connected to the main control unit, the output end of the RF switch U7 is connected to the input end of the AD conversion module U8, and the output end of the AD conversion module U8 is connected to the main control unit.

[0039] In this embodiment, the multi-channel signal acquisition circuit is connected to the AD conversion module U8 through the RF switch U7 in time-sharing, so that the multi-channel signal acquisition circuit can share one AD conversion module U8 and make full use of the resources of the AD conversion module U8; at the same time, the AD conversion module U8 specifically adopts AD9680, which is an 8-channel AD conversion module U8, to realize the acquisition of multiple RF signals.

[0040] Further, if Figure 3 As shown, the signal acquisition circuit includes a low-noise amplifier circuit and a filter circuit connected in sequence.

[0041] In this embodiment, the low-noise amplifier circuit is used to amplify the received second radio frequency signal, and then connected to the radio frequency switch after the interference signal is filtered out by the filter circuit, so as to facilitate the AD conversion module to accurately collect the second radio frequency signal.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Indoor distribution system fault monitoring device, characterized in that: include: The RFID gateway comprises a radio frequency transmitting module and a radio frequency signal receiving circuit connected to the main control unit, wherein the radio frequency transmitting module is used to output a first radio frequency signal of a preset frequency; A combiner, wherein a first input end of the combiner is connected to an output end of the radio frequency transmitting module, a second end of the combiner is connected to a signal source of the indoor distributed system, and an output end of the combiner is connected to a plurality of antennas of the indoor distributed system; An RFID tag is arranged on each antenna of the indoor distribution system, and the RFID tag is used to receive a first radio frequency signal output by the radio frequency transmitting module; The radio frequency signal receiving circuit is used to receive the second radio frequency signal returned by each RFID tag; the main control unit is used to detect the link failure of the indoor subsystem based on the size of each second radio frequency signal.

2. The indoor distribution system fault monitoring device according to claim 1, characterized in that: Also includes: DTU device, one end of the DTU device is connected to the main control unit, and the other end is used to connect to the server.

3. The indoor distribution system fault monitoring device according to claim 2, characterized in that: Also includes: A first power supply circuit, wherein an input end of the first power supply circuit is connected to an AC power supply, and an output end of the first power supply circuit is used to supply power to the RFID gateway; A second power supply circuit, wherein an input end of the second power supply circuit is connected to an AC power supply, and an output end of the second power supply circuit is used to power the DTU device.

4. The indoor distribution system fault monitoring device according to claim 1, characterized in that: The RF signal receiving circuit includes multiple groups, one of which includes a multi-channel signal acquisition circuit, the output ends of the multiple signal acquisition circuits are respectively connected to multiple input ends of the RF switch, the control end of the RF switch is connected to the main control unit, the output end of the RF switch is connected to the input end of the AD conversion module, and the output end of the AD conversion module is connected to the main control unit.

5. The indoor distribution system fault monitoring device according to claim 4, characterized in that: The signal acquisition circuit comprises a low-noise amplifier circuit and a filter circuit which are connected in sequence.

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