DMR signal field intensity detection system for railway

Abstract

The utility model provides a DMR signal field intensity detection system for a railway. The DMR signal field intensity detection system comprises a detection device and an external data receiving unit, the detection device comprises a shell, a circuit board arranged in the shell and a display screen arranged outside the shell, and a main control unit, a digital interphone signal receiving and processing unit and an interface unit are integrated on the circuit board; the digital interphone signal receiving and processing unit, the interface unit and the display screen are electrically connected with the main control unit; the digital interphone signal receiving and processing unit comprises an antenna, a detection unit and an AD sampling unit. According to the utility model, the field intensity of one or several channels of the DMR system at a certain position in the space can be measured, and the field intensity distribution of the frequency of a certain channel in the space can be visually seen, so that the field intensity distribution can be used as the most powerful technical reference index for improving the vehicle-ground talkback call quality and improving the safety and reliability; and the reliability and the safety of the operation of the railway locomotive can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to signal detection technical field, especially a kind of DMR signal field strength detection system for railway. BACKGROUND

[0002] DMR is a kind of digital wireless communication technology, with multi-channel, group conversation, short message transmission, broadcast conversation, call priority function, with high voice quality, wide coverage, strong anti-interference ability and other advantages, has been widely applied in public safety field, commercial field, transportation field, construction site field, tourism and entertainment field.

[0003] Currently, some railways have adopted DMR system as intelligent command and dispatching inspection system in engineering and transportation. At present, the equipment that can be used for DMR signal field strength coverage test in China is basically multifunctional comprehensive instrument used for radio monitoring and detection and measurement unit, and most of the instruments are imported, which are expensive and complex. Therefore, the market urgently needs professional, simple and portable equipment for DMR field strength coverage test of railway system. SUMMARY

[0004] Therefore, the utility model aims at overcoming the above problems in the prior art, and provides a DMR signal field strength detection system for railway.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A DMR signal field strength detection system for railway, comprising a detection device and an external data receiving unit, wherein the detection device and the external data receiving unit are in data communication.

[0007] The detection device comprises a housing, a circuit board arranged in the housing and a display screen arranged outside the housing, wherein the circuit board is integrated with a main control unit, a digital intercom signal receiving and processing unit and an interface unit; the digital intercom signal receiving and processing unit, the interface unit and the display screen are electrically connected to the main control unit.

[0008] The digital intercom signal receiving and processing unit comprises an antenna, a detection unit and an AD sampling unit, wherein the antenna is used to receive DMR signal, and the DMR signal is demodulated by the detection unit to obtain direct current voltage signal, and then the direct current voltage signal is sent to the main control unit after AD sampling by the AD sampling unit.

[0009] The main control unit judges the size of DMR signal field strength according to the size of received signal, and displays the size of DMR signal field strength on the display screen.

[0010] Further, the detection device includes a plurality of external data receiving units connected through the interface unit.

[0011] Further, the interface unit includes an RJ45 interface and a USB interface.

[0012] Further, the shell further comprises a positioning module, which comprises a Beidou positioning module or a GPS module.

[0013] Further, the shell comprises an upper shell, a lower shell, a front baffle, a rear baffle and a protective frame, the front baffle and the rear baffle are connected with the upper shell and the lower shell respectively, and the protective frame fixes the front baffle and the rear baffle with the upper shell and the lower shell respectively.

[0014] Further, the front baffle and the rear baffle are connected with the upper shell and the lower shell through screws.

[0015] Further, the front baffle is provided with a switch hole, an indicator light hole, an RJ45 interface hole and a USB interface hole.

[0016] Further, the external data receiving unit comprises an upper computer arranged in a general dispatching room.

[0017] Further, the upper computer is further connected with a remote server.

[0018] Further, the main control unit comprises a processor, and the processor adopts a T5L2 chip.

[0019] Compared with the prior art, the DMR signal field strength detection system for a railway has the following advantages:

[0020] The DMR system can measure the field strength of one or several channels at a certain position in space, and the field strength distribution of the channel frequency in space can be directly observed, so as to serve as the most powerful technical reference index for improving the train-ground intercom quality and improving the safety and reliability, and greatly improve the reliability and safety of the railway locomotive operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a principle schematic view of the DMR signal field strength detection system for a railway of the present application;

[0023] Figure 2The utility model discloses a detection device structure schematic view.

[0024] Figure 3 The utility model discloses a detection device partial schematic view.

[0025] Figure 4 The utility model discloses a detection device's side view.

[0026] Figure 5 The utility model discloses a detection device's plan view.

[0027] Mark explanation

[0028] 1 - upper casing, 2 - lower casing, 3 - front baffle, 4 - rear baffle, 5 - protection frame, 6 - screw, 7 - switch hole, 8 - pilot lamp hole, 9 - RJ45 interface hole. Specific implementation

[0029] It should be explained that the embodiment in the utility model and the feature in the embodiment can be combined mutually without conflict.

[0030] In the description of the utility model, it should be understood that the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0031] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, or detachable connection, or integrally connected, can be mechanical connection, or electrical connection, can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0032] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] As Figure 1 The utility model provides a DMR signal field strength detection system for railway, including detection device and external data receiving unit, detection device with external data receiving unit carries out data communication,

[0034] The detection device includes a housing, a circuit board disposed within the housing, a display screen disposed outside the housing, the circuit board integrated with a master control unit, a digital intercom signal receiving and processing unit, and an interface unit; the digital intercom signal receiving and processing unit, the interface unit and the display screen are all electrically connected to the master control unit.

[0035] The digital intercom signal receiving and processing unit includes an antenna, a detection unit, and an AD sampling unit, the antenna is used for receiving DMR signal, through the detection unit for detection demodulation, get direct current voltage signal, and through AD sampling unit after AD sampling send to master control unit;

[0036] The master control unit judges the size of the DMR signal field strength according to the size of the received signal, and displays it through the display screen.

[0037] In the utility model, the detection device can include multiple, through arranging in different positions or through the way of inspection carries out comprehensive detection, multiple detection devices all connect external data receiving unit through interface unit.

[0038] In the utility model, the interface unit includes an RJ45 interface and a USB interface.

[0039] In the utility model, the housing is also provided with a positioning module, and the positioning module includes a Beidou positioning module or a GPS module.

[0040] As Figures 2-5 In the utility model, the housing includes an upper shell 1, a lower shell 2, a front baffle 3, a rear baffle 4 and a protective frame 5, the front baffle 3 and the rear baffle 4 are connected with the upper shell 1 and the lower shell 2 respectively, and the protective frame 5 fixes the front baffle 3, the rear baffle 4, the upper shell 1 and the lower shell 2 respectively.

[0041] The front baffle 3 and the rear baffle 4 are provided with connecting holes at four corners, and the front baffle 3 and the rear baffle 4 are connected with the upper shell 1 and the lower shell 2 through screws 6.

[0042] As Figure 4 The front baffle 3 is provided with a switch hole 7, an indicator light hole 8, an RJ45 interface hole 9 and a USB interface hole.

[0043] In the utility model, the external data receiving unit includes an upper computer arranged in a general dispatching room.

[0044] In the utility model, the upper computer is further connected with a remote server.

[0045] In the utility model, the main control unit comprises a processor, and the processor adopts a T5L2 chip.

[0046] In the utility model, when working, the digital interphone signal receiving and processing unit receives the DMR signal transmitted in space or a wired cable, and performs detection and demodulation, and outputs a direct current voltage signal; the AD sampling chip is used for sampling the direct current voltage, and the signal is transmitted to the main control unit; the main control unit judges the field intensity according to the size of the direct current voltage, and displays the result on the display screen.

[0047] The utility model utilizes the Beidou positioning module or the GPS module to collect the position information of the signal, and transmits the signal to the main control unit; the main control unit can output near range or remote range through the USB or RJ45 interface, so that the data intercommunication of the remote terminal can be realized.

[0048] It should be noted that the electronic components used in the utility model are all existing products in the field, and the connection relationship between the electronic components is also a conventional connection relationship in the field, which can realize data transmission, and is not limited to specific models.

[0049] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A DMR signal field strength detection system for railways, characterized by: The detection device and an external data receiving unit are in data communication; The detection device comprises a housing, a circuit board arranged in the housing, and a display screen arranged outside the housing, the circuit board is integrated with a main control unit, a digital intercom signal receiving and processing unit, and an interface unit; the digital intercom signal receiving and processing unit, the interface unit, and the display screen are electrically connected to the main control unit; The digital intercom signal receiving and processing unit comprises an antenna, a detection unit, and an AD sampling unit, the antenna is used to receive a DMR signal, the DMR signal is demodulated by the detection unit to obtain a direct current voltage signal, and the direct current voltage signal is sent to the main control unit after AD sampling by the AD sampling unit; The main control unit judges the DMR signal field strength according to the size of the received signal and displays the DMR signal field strength on the display screen.

2. The DMR signal field strength detection system for railway of claim 1, wherein: The detection device comprises a plurality of detection devices, and each detection device is connected to the external data receiving unit through the interface unit.

3. The DMR signal field strength detection system for railway as claimed in claim 1 wherein: The interface unit comprises an RJ45 interface and a USB interface.

4. The DMR signal field strength detection system for railway of claim 1, wherein: The housing further comprises a positioning module, and the positioning module comprises a Beidou positioning module or a GPS module.

5. The DMR signal field strength detection system for railway as claimed in claim 1 wherein: The housing comprises an upper housing (1), a lower housing (2), a front baffle (3), a rear baffle (4), and a protection frame (5), the front baffle (3) and the rear baffle (4) are connected to the upper housing (1) and the lower housing (2) respectively, and the protection frame (5) fixes the front baffle (3) and the rear baffle (4) to the upper housing (1) and the lower housing (2) respectively.

6. A DMR signal field strength detection system for railways as claimed in claim 5 wherein: The four corners of the front baffle (3) and the rear baffle (4) are provided with connecting holes, and the front baffle (3) and the rear baffle (4) are connected to the upper housing (1) and the lower housing (2) by screws (6).

7. A DMR signal field strength detection system for railways as claimed in claim 6 wherein: The front baffle (3) is provided with a switch hole (7), an indicator light hole (8), an RJ45 interface hole (9), and a USB interface hole.

8. The DMR signal field strength detection system for railway as claimed in claim 1 wherein: The external data receiving unit comprises an upper computer arranged in a general dispatching room.

9. A DMR signal field strength detection system for railways as claimed in claim 8 wherein: The upper computer is further connected to a remote server.

10. The DMR signal field strength detection system for railway of claim 1, wherein: The main control unit comprises a processor, and the processor adopts a T5L2 chip.

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