WO2022156153A1 - 一种远距离广播线路检测装置 - Google Patents

一种远距离广播线路检测装置 Download PDF

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Publication number
WO2022156153A1
WO2022156153A1 PCT/CN2021/104540 CN2021104540W WO2022156153A1 WO 2022156153 A1 WO2022156153 A1 WO 2022156153A1 CN 2021104540 W CN2021104540 W CN 2021104540W WO 2022156153 A1 WO2022156153 A1 WO 2022156153A1
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module
detection
line
broadcast line
resistor
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PCT/CN2021/104540
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English (en)
French (fr)
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朱正辉
张常华
赵定金
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广州市保伦电子有限公司
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Publication of WO2022156153A1 publication Critical patent/WO2022156153A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting

Definitions

  • the invention relates to the field of public broadcasting, in particular to a long-distance broadcasting line detection device.
  • the probability of damage to the components in the detection circuit increases with the increase of the length of the broadcast line, and the detection accuracy is too low, resulting in frequent misjudgments in the system. Therefore, the length of the existing detectable broadcast line is generally within 5 kilometers, while the length of the broadcast line in some large public places (train stations, large shopping malls, etc.) is often more than 5 kilometers, but the frequent replacement of components and detection accuracy If it is too low, the operation and maintenance cost of the broadcasting system is too high, and it cannot be effectively detected, and the normal broadcasting of the broadcasting system cannot be guaranteed, which brings great security risks to large public places.
  • the purpose of the present invention is to provide a long-distance broadcast line detection device, which can solve the problem that the probability that the components in the detection circuit are damaged as the length of the broadcast line increases synchronously increases, and the detection accuracy is too high. low problem.
  • a long-distance broadcast line detection device comprising a booster module for increasing the voltage of a broadcast signal, a line switch module for driving the booster module and the broadcast line to be in one of the states of being on or off, and a line switch module for sending the broadcaster
  • a detection paranoid module for line transmission detection signals
  • a detection switch module for driving the detection paranoid module and the broadcast line to be in one of the states of conduction and disconnection
  • a detection acquisition module for collecting detection signals
  • a detection and acquisition module for analyzing and processing detection signals
  • the main control module, the boosting module is connected to the broadcast line through the line switch module
  • the detection paranoia module is connected to the broadcast line through the detection switch module
  • the output end of the detection switch module is connected to the input end of the detection and acquisition module
  • the output end of the monitoring and collecting module is connected with the main control module.
  • the line switch module includes a driving transistor Q1 and a relay K1
  • the relay K1 includes a first normally open contact and a first coil corresponding to the first normally open contact
  • the output end of the boost module The first normally open contact is connected to the broadcasting line, one end of the first coil is connected to a power supply, and the other end of the first coil is connected to the collector of the driving transistor Q1, and the emitter of the driving transistor Q1 is grounded, so The base of the driving transistor Q1 is connected to the output end of the main control module.
  • the boosting module is a pure passive device.
  • the detection switch module includes a switch circuit
  • the switch circuit includes a relay K2 and a transistor Q2
  • the relay K2 includes a second normally open contact K21, a second normally open contact K22 and a second coil
  • the detection and acquisition module is connected to the broadcast line through the second normally open contact K21
  • the detection paranoia module is connected to the broadcast circuit through the second normally open contact K22.
  • One end of the second coil is connected to an external power supply, and the other end of the second coil is connected to the broadcast line. It is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the base of the transistor Q2 is connected to the output end of the main control module.
  • the detection switch module further includes a high-voltage discharge circuit
  • the high-voltage discharge circuit includes a self-recovery fuse F1, a self-recovery fuse F2, a varistor RV1, a varistor RV2 and a gas discharge tube GD1.
  • the two normally open contacts K21 and one end of the varistor RV1 are connected to the broadcasting line through the resettable fuse F1
  • the second normally open contact K22 and one end of the varistor RV2 are both connected to the broadcasting line through the resettable fuse F2
  • the other end of the varistor RV1 and the other end of the varistor RV2 are both grounded through the gas discharge tube GD1.
  • the detection switch module further includes a high-voltage detection circuit
  • the high-voltage detection circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a photocell S1, and a photodiode D1 corresponding to the photocell S1,
  • One end of the resettable fuse F1 close to the relay K2 is connected to one end of the resistor R4 through the resistor R2
  • one end of the resettable fuse F2 close to the relay K2 is connected to one end of the resistor R3 through the resistor R1, and the other end of the resistor R3 and
  • the other end of the resistor R4 is grounded through the photocell S1, one end of the resistor R5 is connected to a power supply, and the other end of the resistor R5 and the collection end of the main control module are both connected to the positive electrode of the photodiode D1, the Negative ground.
  • it also includes a network module for connecting external devices, and the communication end of the main control module is connected to the network module.
  • the detection paranoia module is connected to the input end of the terminal detection module through the detection switch module and the broadcast line in sequence, and the detection and acquisition module sequentially passes through the detection switch module, the broadcast line and the terminal detection module.
  • the line is connected to the output terminal of the terminal detection module.
  • the beneficial effect of the present invention is that: the broadcast line and the detection line are driven to be in an open-circuit state during non-operation through the line switch module and the detection switch module, so as to avoid the broadcast line under the interference of the electromagnetic field, which can cause high voltage induction.
  • the electromotive force affects the safety of broadcasting equipment and detection equipment.
  • the connection between the booster module and the broadcasting line is established through the line switch module, and the detection paranoia module and detection acquisition module are respectively disconnected through the detection switch module.
  • the connection of the line that is, there is only the broadcast signal in the broadcast line at this time, and there is no detection signal, which avoids the interference between the signals and ensures the high-quality transmission of the broadcast signal.
  • the boost module and the broadcast line are disconnected through the line switch module.
  • the connection between the detection paranoia module and detection acquisition module and the broadcast line is established respectively through the detection switch module, that is, there is only detection signal in the broadcast line at this time, no broadcast signal, to avoid interference between signals, on the broadcast line.
  • a high-quality detection feedback signal can be obtained, which can ensure that the signal sampled back by the detection sampling module is an ideal signal.
  • FIG. 1 is a circuit diagram of the main control module described in the present invention.
  • FIG. 2 is an enlarged schematic diagram of area A in FIG. 1 .
  • FIG. 3 is an enlarged schematic diagram of region B in FIG. 1 .
  • FIG. 4 is an enlarged schematic diagram of region C in FIG. 1 .
  • FIG. 5 is an enlarged schematic diagram of the area D in FIG. 1 .
  • FIG. 6 is a circuit diagram of the detection paranoia module described in the present invention.
  • FIG. 7 is an enlarged schematic diagram of the E region in FIG. 6 .
  • FIG. 8 is an enlarged schematic diagram of the F region in FIG. 6 .
  • FIG. 9 is a schematic structural diagram of the long-distance broadcast line detection device described in the present invention.
  • FIG. 10 is a schematic diagram of a practical application of the long-distance broadcast line detection device described in the present invention.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • the broadcasting system includes a broadcasting signal module for generating or receiving broadcasting signals, a broadcasting line for transmitting broadcasting signals over a long distance, and a speaker for broadcasting broadcasting signals, and the broadcasting signal modules pass through the boosting module,
  • the broadcasting line is connected to the speaker.
  • the broadcasting signal module boosts the conventional broadcasting signals with voltages of 50V, 70V, 100, 120V, etc. to a predetermined voltage value, such as 400V, through the boosting module, which can be adjusted according to the distance of the actual broadcasting line. Determines the boosted voltage to reduce the loss of broadcast signals over long distances.
  • a long-distance broadcast line detection device includes a booster module for increasing the voltage of the broadcast signal, and a booster module for driving the booster module and the broadcast line to be in one of the states of being on or off.
  • the boosting module is connected to the broadcast line through a line switch module, preferably, the line switch module includes a drive transistor Q1 and a relay K1, and the relay K1 includes a first A normally open contact and a first coil corresponding to the first normally open contact, the output end of the boost module is connected to the broadcast line through the first normally open contact, and one end of the first coil is connected to a power supply, so The other end of the first coil is connected to the collector of the driving transistor Q1, the emitter of the driving transistor Q1 is
  • the main control module sends a high/low level to the base of the driving transistor Q1 to drive the driving transistor Q1 to be in one of the on and off states, thereby driving the first normally open contact of the relay K1 to be in a state of being on or off.
  • Open and close one of the states that is, drive the boost module and the broadcast line to be in one of the states of conduction and disconnection.
  • the broadcasting signal module, booster module, broadcasting line and loudspeaker are still in a closed-loop state. According to the law of electromagnetic induction, the closed coil will induce electromotive force in the changing electromagnetic field.
  • the broadcasting signal module is driven by the line switch module (switch module 1 shown in Figure 10). , The closed loop formed by the booster module, the broadcast line and the speaker is in an open state.
  • the main control module drives the drive transistor Q1 to be in an off state by sending a low level to the drive transistor Q1, so that the first coil in the relay K1 is disconnected.
  • electricity, the first normally open contact is in an open state, that is, the broadcast line is in an open circuit, thereby preventing the generation of induced electromotive force;
  • the main control module includes a chip U2, whose model is M487SIDAE.
  • the main control module drives the driving transistor Q1 to be in a conducting state by sending a high level to the driving transistor Q1, so that the first coil in the relay K1 is energized.
  • the energized The first coil generates a magnetic field, which drives the first normally open contact to close, that is, the closed loop formed by the broadcast signal module, the booster module, the broadcast line and the speaker is in a conducting state.
  • the boosting module is a pure passive device.
  • isolation is achieved through a boosting module belonging to a pure passive device (such as a transformer). protection to avoid major damage to the broadcasting system.
  • the detection paranoia module (its specific circuit structure is shown in Figures 6-8) is connected to the broadcast line through the detection switch module, the output end of the detection switch module is connected to the input end of the detection and acquisition module, the monitoring and acquisition module The output end of the module is connected with the main control module.
  • the detection switch module includes a switch circuit
  • the switch circuit includes a relay K2 and a transistor Q2
  • the relay K2 includes a second normally open contact K21, a second normally open contact K22 and a second coil
  • the The detection and acquisition module is connected to the broadcast line through the second normally open contact K21
  • the detection paranoia module is connected to the broadcast circuit through the second normally open contact K22.
  • One end of the second coil is connected to an external power supply, and the other end of the second coil is connected to the broadcast line. It is connected to the collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the base of the transistor Q2 is connected to the output end of the main control module.
  • the main control model when there is no need to detect the broadcast line, the main control model sends a low level to the transistor Q2 to drive the transistor Q2 to be in an off state, so that the second coil in the relay K2 is powered off, then the second constant
  • the open contact K21 and the second normally open contact K22 are in the open state, that is, the connection between the detection paranoia module and the detection sampling module and the broadcast line is disconnected, thereby preventing the induced electromotive force generated by the broadcast line from invading the detection paranoia module and detection sampling.
  • the main control model sends a high level to the transistor Q2 to drive the transistor Q2 to be in a conducting state, so that the second coil in the relay K2 is energized, and the second normally open contacts K21,
  • the second normally open contact K22 is in a closed state, that is, the detection paranoia module and the detection sampling module are connected to the broadcast line, and the broadcast signal generated or received by the detection paranoia module can enter the broadcast line through the detection switch module at this time, and transmit To the terminal detection module located at the end of the broadcast line and used for returning the detection signal, the detection signal returned by the terminal detection module will enter the broadcast line and the detection switch module into the detection sampling module.
  • the detection switch module (switch module 2 shown in FIG. 10 ) further includes a high-voltage discharge circuit, and the high-voltage discharge circuit includes a resettable fuse F1, a resettable fuse F2, a varistor RV1, a voltage
  • the high-voltage discharge circuit includes a resettable fuse F1, a resettable fuse F2, a varistor RV1, a voltage
  • the second normally open contact K21 and one end of the varistor RV1 are connected to the broadcast line through the resettable fuse F1
  • the second normally open contact K22 and the varistor RV2 One end of the varistor RV1 is connected to the broadcast line through the resettable fuse F2, and the other end of the varistor RV1 and the other end of the varistor RV2 are grounded through the gas discharge tube GD1.
  • the broadcast circuit When the broadcast circuit is detected, the broadcast circuit will generate a high-voltage induced electromotive force under the influence of the outside world. At this time, the varistor RV1, the varistor RV2 and the gas discharge tube GD1 are under the influence of the high-voltage induced electromotive force. The high-voltage induced electromotive force is short-circuited to the ground to limit the induced high-voltage on the broadcasting line.
  • the detection switch module further includes a high-voltage detection circuit
  • the high-voltage detection circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a photocell S1, and a photodiode D1 corresponding to the photocell S1,
  • One end of the resettable fuse F1 close to the relay K2 is connected to one end of the resistor R4 through the resistor R2
  • one end of the resettable fuse F2 close to the relay K2 is connected to one end of the resistor R3 through the resistor R1, and the other end of the resistor R3 and
  • the other end of the resistor R4 is grounded through the photocell S1, one end of the resistor R5 is connected to a power supply, and the other end of the resistor R5 and the collection end of the main control module are both connected to the positive electrode of the photodiode D1, the Negative ground.
  • the broadcast line when the broadcast line generates an induced high voltage, the voltage limited by the resistor R1, the resistor R2, the resistor R3, and the resistor R4 makes the glow tube of the photocell S1 ionize and emit light, and the light turns the photodiode D1 on.
  • the detection of abnormal high-voltage signals and then control the relay K2 to cut off the power, quickly leave the broadcast line, and ensure that the more sensitive detection components are not damaged. After the high-voltage interference recedes, the connection of the relay K2 is resumed, and the detection task is continued.
  • the broadcasting system is mainly divided into idle time, broadcasting time and detection time, wherein the idle time is more than the broadcasting time and more than the detection time.
  • the main control module drives the relay K1 and the relay K2 to power off, causing the first The first normally open contact, the second normally open contact K21 and the second normally open contact K22 are all open, so as to protect other electrical components from being disturbed by the high-voltage induced electromotive force in the broadcast line.
  • the main control module drives the The relay K1 is energized and the relay K2 is de-energized, which causes the first normally open contact to be closed, and the second normally open contact K21 and the second normally open contact K22 are both open, so that the broadcast signal in the broadcast signal module is boosted.
  • the module enters the broadcast line and transmits it to the speaker for playback.
  • the detection switch module disconnects the connection between the detection paranoid module and the broadcast line, that is, there is only broadcast signal in the broadcast line at this time, and there is no detection signal to avoid signal interference.
  • the main control module drives the relay K1 to power off and the relay K2 to power on, resulting in the opening of the first normally open contact, the second normally open contact K21 and the second normally open contact Point K22 is in the closed state, so that the connection between the detection paranoia module and the broadcast line is established, the detection signal is transmitted to the terminal detection module through the broadcast line, and the terminal detection module transmits the detection signal back to the detection sampling module through the broadcast line, and then The main control module feeds back the detection results through the network module used to connect external devices, and the connection between the booster module and the broadcast line is disconnected, that is, there is only a detection signal in the broadcast line at this time, and there is no broadcast signal, so as to avoid signal interference.
  • high-quality detection feedback signal can be obtained on the broadcast line, which can ensure that the signal sampled by the detection sampling module is an ideal signal.

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  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

本发明公开了一种远距离广播线路检测装置，包括升压模块、线路开关模块、检测偏执模块、检测开关模块、检测采集模块和主控模块，所述升压模块通过线路开关模块与广播线路连接，所述检测偏执模块通过检测开关模块与广播线路连接，所述检测开关模块的输出端与检测采集模块的输入端连接，所述监测采集模块的输出端与主控模块连接。在本发明中，通过线路开关模块和检测开关模块驱使广播线路和检测线路在非作业时均处于断路状态，以避免线路在电磁场的干扰下，产生感应电动势，并威胁广播设备的安全。

Description

一种远距离广播线路检测装置 技术领域
本发明涉及公共广播领域，尤其涉及一种远距离广播线路检测装置。
背景技术
目前，对于公共广播线路检测的方式有载波检测、阻抗检测等。这些检测方案都有一个不足：检测电路中的元器件随广播线路的长度增加而损坏的概率同步增大，并且检测精度过低，导致系统经常出现误判。故现有的可检测的广播线路长度一般在5千米以内，而一些大型的公共场所(火车站、大型商场等)的广播线路长度往往超过5千米，但元器件的频繁更换以及检测精度过低，导致广播系统运维成本过高，而且无法得到有效检测，无法保障广播系统进行正常的广播，给大型公共场所带来极大的安全隐患。
发明内容
为了克服现有技术的不足，本发明的目的在于提供一种远距离广播线路检测装置，其能解决检测电路中的元器件随广播线路的长度增加而损坏的概率同步增大，并且检测精度过低的问题。
为了达到上述目的，本发明所采用的技术方案如下：
一种远距离广播线路检测装置，包括用于提高广播信号电压的升压模块、用于驱使升压模块与广播线路之间处于导通和断路其中一种状态的线路开关模块、用于向广播线路输送检测信号的检测偏执模块、用于驱使检测偏执模块与广播线路之间处于导通和断路其中一种 状态的检测开关模块、用于采集检测信号的检测采集模块和用于分析处理检测信号的主控模块，所述升压模块通过线路开关模块与广播线路连接，所述检测偏执模块通过检测开关模块与广播线路连接，所述检测开关模块的输出端与检测采集模块的输入端连接，所述监测采集模块的输出端与主控模块连接。
优选的，所述线路开关模块包括驱动三极管Q1和继电器K1，所述继电器K1包括第一常开触点和与第一常开触点对应设置的第一线圈，所述升压模块的输出端通过第一常开触点与广播线路连接，所述第一线圈的一端外接电源，所述第一线圈的另一端与驱动三极管Q1的集电极连接，所述驱动三极管Q1的发射极接地，所述驱动三极管Q1的基极与主控模块的输出端连接。
优选的，所述升压模块为纯无源器件。
优选的，所述检测开关模块包括开关电路，所述开关电路包括继电器K2和三极管Q2，所述继电器K2包括第二常开触点K21、第二常开触点K22和第二线圈，所述检测采集模块通过第二常开触点K21与广播线路连接，检测偏执模块通过第二常开触点K22与广播线路连接，所述第二线圈的一端外接电源，所述第二线圈的另一端与三极管Q2的集电极连接，所述三极管Q2的发射极接地，所述三极管Q2的基极与主控模块的输出端连接。
优选的，所述检测开关模块还包括高压泄放电路，所述高压泄放电路包括自恢复保险丝F1、自恢复保险丝F2、压敏电阻RV1、压敏电阻RV2和气体放电管GD1，所述第二常开触点K21和压敏电阻 RV1的一端均通过自恢复保险丝F1与广播线路连接，所述第二常开触点K22和压敏电阻RV2的一端均通过自恢复保险丝F2与广播线路连接，所述压敏电阻RV1的另一端和压敏电阻RV2的另一端均通过气体放电管GD1接地。
优选的，所述检测开关模块还包括高压检测电路，所述高压检测电路包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、光电管S1和与光电管S1对应设置的光敏二极管D1，所述自恢复保险丝F1靠近继电器K2的一端通过电阻R2与电阻R4的一端连接，所述自恢复保险丝F2靠近继电器K2的一端通过电阻R1与电阻R3的一端连接，所述电阻R3的另一端和电阻R4的另一端均通过光电管S1接地，所述电阻R5的一端外接电源，所述电阻R5的另一端和主控模块的采集端均与光敏二极管D1的正极连接，所述光敏二极管D1的负极接地。
优选的，还包括用于连接外界设备的网络模块，所述主控模块的通信端与网络模块连接。
优选的，还包括用于回传检测信号的终端检测模块，所述检测偏执模块依次通过检测开关模块、广播线路与终端检测模块的输入端连接，所述检测采集模块依次通过检测开关模块、广播线路与终端检测模块的输出端连接。
相比现有技术，本发明的有益效果在于：通过线路开关模块和检测开关模块驱使广播线路和检测线路在非作业时均处于断路状态，以避免广播线路在电磁场的干扰下，产生能够高压感应电动势，影响广 播设备和检测设备的安全，同时进行广播信号传输时，通过线路开关模块建立升压模块和广播线路之间的连接，通过检测开关模块分别断开检测偏执模块和检测采集模块与广播线路的连接，即此时广播线路中只有广播信号，没有检测信号，避免信号之间的干扰，保障了广播信号的高质量传输，进行检测时，通过线路开关模块断开升压模块和广播线路之间的连接，通过检测开关模块分别建立检测偏执模块和检测采集模块与广播线路之间的连接，即此时广播线路中只有检测信号，没有广播信号，避免信号之间的干扰，广播线路上可以得到高质量的检测反馈信号，可以保证检测采样模块采样回去的信号是理想的信号。
附图说明
图1为本发明中所述的主控模块的电路图。
图2为图1中A区域放大示意图。
图3为图1中B区域放大示意图。
图4为图1中C区域放大示意图。
图5为图1中D区域放大示意图。
图6为本发明中所述的检测偏执模块的电路图。
图7为图6中E区域放大示意图。
图8为图6中F区域放大示意图。
图9为本发明中所述的远距离广播线路检测装置的结构示意图。
图10为本发明中所述的远距离广播线路检测装置的实际应用示意图。
具体实施方式
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
下面，结合附图以及具体实施方式，对本发明做进一步描述：
在本发明中，广播系统包括用于生成或者接收广播信号的广播信号模块、用于长距离输送广播信号的广播线路和用于播放广播信号的扬声器，所述广播信号模块依次通过升压模块、广播线路与扬声器连接，在本实施例中，广播信号模块通过升压模块将电压为50V、70V、 100、120V等常规广播信号升高至预定压值，例如400V，可根据实际广播线路的距离确定升压的电压，从而减少广播信号在长距离的输送过程中的损耗。
如图1-10所示，一种远距离广播线路检测装置，包括用于提高广播信号电压的升压模块、用于驱使升压模块与广播线路之间处于导通和断路其中一种状态的线路开关模块、用于向广播线路输送检测信号的检测偏执模块、用于驱使检测偏执模块与广播线路之间处于导通和断路其中一种状态的检测开关模块、用于采集检测信号的检测采集模块和用于分析处理检测信号的主控模块，所述升压模块通过线路开关模块与广播线路连接，优选的，所述线路开关模块包括驱动三极管Q1和继电器K1，所述继电器K1包括第一常开触点和与第一常开触点对应设置的第一线圈，所述升压模块的输出端通过第一常开触点与广播线路连接，所述第一线圈的一端外接电源，所述第一线圈的另一端与驱动三极管Q1的集电极连接，所述驱动三极管Q1的发射极接地，所述驱动三极管Q1的基极与主控模块的输出端连接。具体的，所述主控模块通过向驱动三极管Q1的基极发送高/低电平，以驱使驱动三极管Q1处于导通和截止其中一种状态，进而驱使继电器K1的第一常开触点处于打开和闭合其中一种状态，即驱使升压模块与广播线路之间处于导通和断路其中一种状态。在本实施例中，广播系统处于空闲时，广播信号模块、升压模块、广播线路和扬声器仍处于一个闭环状态，根据电磁感应定律，闭合的线圈在变化的电磁场中会感应出电动势。当用于长距离输送广播信号的广播线路遇到强干扰的电磁 场时，例如设置在地铁隧道和动车轨道旁等场所的广播线路，遇到列车经过时，则可能会导致处于闭合回路中的广播线路感应出上千伏的电动势，产生的感应电动势不仅威胁广播设备的安全，还会影响广播设备的工作状态，故通过线路开关模块(如图10中所示的开关模块1)驱使广播信号模块、升压模块、广播线路和扬声器组成闭合回路处于断路状态，具体的，主控模块通过向驱动三极管Q1发送低电平，驱使驱动三极管Q1处于截止状态，以使得继电器K1中的第一线圈断电，则第一常开触点处于打开状态，即广播线路处于开路中，从而阻止感应电动势的产生；其中，所述主控模块包括芯片U2，其型号为M487SIDAE。广播系统进入工作状态时，主控模块通过向驱动三极管Q1发送高电平，驱使驱动三极管Q1处于导通状态，以使得继电器K1中的第一线圈通电，根据电生磁原理，此时通电的第一线圈产生磁场，驱使第一常开触点闭合，即广播信号模块、升压模块、广播线路和扬声器组成闭合回路处于导通状态。
优选的，所述升压模块为纯无源器件，当广播系统进行正常广播任务时，碰巧遇到强干扰的情况，则通过属于纯无源器件(例如变压器)的升压模块来是实现隔离保护，避免广播系统出现大损伤。
同时，所述检测偏执模块(其具体电路结构如图6-8所示)通过检测开关模块与广播线路连接，所述检测开关模块的输出端与检测采集模块的输入端连接，所述监测采集模块的输出端与主控模块连接。优选的，所述检测开关模块包括开关电路，所述开关电路包括继电器K2和三极管Q2，所述继电器K2包括第二常开触点K21、第二常开 触点K22和第二线圈，所述检测采集模块通过第二常开触点K21与广播线路连接，检测偏执模块通过第二常开触点K22与广播线路连接，所述第二线圈的一端外接电源，所述第二线圈的另一端与三极管Q2的集电极连接，所述三极管Q2的发射极接地，所述三极管Q2的基极与主控模块的输出端连接。在本实施例中，无需对广播线路进行检测时，所述主控模型向三极管Q2发送低电平，驱使三极管Q2处于截止状态，以使得继电器K2中的第二线圈断电，则第二常开触点K21、第二常开触点K22处于打开状态，即断开检测偏执模块和检测采样模块与广播线路之间的连接，从而阻止广播线路产生的感应电动势侵入到检测偏执模块和检测采样模块中；进行广播线路检测时，所述主控模型向三极管Q2发送高电平，驱使三极管Q2处于导通状态，以使得继电器K2中的第二线圈通电，驱使第二常开触点K21、第二常开触点K22处于关闭状态，即检测偏执模块和检测采样模块与广播线路之间连接起来，检测偏执模块生成或者接收的广播信号此时可以通过检测开关模块进入到广播线路，并传输至位于广播线路末端且用于回传检测信号的终端检测模块中，终端检测模块回传的检测信号将广播线路、检测开关模块进入检测采样模块中。
优选的，所述检测开关模块(如图10中所示的开关模块2)还包括高压泄放电路，所述高压泄放电路包括自恢复保险丝F1、自恢复保险丝F2、压敏电阻RV1、压敏电阻RV2和气体放电管GD1，所述第二常开触点K21和压敏电阻RV1的一端均通过自恢复保险丝F1与广播线路连接，所述第二常开触点K22和压敏电阻RV2的一端均 通过自恢复保险丝F2与广播线路连接，所述压敏电阻RV1的另一端和压敏电阻RV2的另一端均通过气体放电管GD1接地。当进行广播线路检测时，广播线路受外界影响中产生高压的感应电动势，此时压敏电阻RV1、压敏电阻RV2和气体放电管GD1在高压的感应电动势的影响下，击穿导通，将高压的感应电动势短接到大地，实现对广播线路感应高电压的限制。
优选的，所述检测开关模块还包括高压检测电路，所述高压检测电路包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、光电管S1和与光电管S1对应设置的光敏二极管D1，所述自恢复保险丝F1靠近继电器K2的一端通过电阻R2与电阻R4的一端连接，所述自恢复保险丝F2靠近继电器K2的一端通过电阻R1与电阻R3的一端连接，所述电阻R3的另一端和电阻R4的另一端均通过光电管S1接地，所述电阻R5的一端外接电源，所述电阻R5的另一端和主控模块的采集端均与光敏二极管D1的正极连接，所述光敏二极管D1的负极接地。在本实施例中，当广播线路产生感应高电压时，经电阻R1、电阻R2、电阻R3、电阻R4限流后的电压使光电管S1的辉光管电离发光，光线使光敏二极管D1导通将上拉的高压危险信号拉底，使高压危险信号由高电平变为低电平，主控模块接收到变低的电平信号则感知到线路产生了高压危险情况，实现对广播线路上异常高压信号的检测，进而控制继电器K2断电，迅速脱离广播线路，保证较敏感的检测元器件不被损坏。待高压干扰退去后，在恢复继电器K2的接通，继续执行检测任务。
在本实施例中，广播系统主要分为空闲时间、广播时间和检测时间，其中空闲时间多于广播时间多于检测时间，空闲时间内，主控模块驱使继电器K1、继电器K2断电，导致第一常开触点、第二常开触点K21和第二常开触点K22均处于打开状态，从而保护其他电气元件不被广播线路中的高压感应电动势干扰，广播时间内，主控模块驱使继电器K1通电、继电器K2断电，导致第一常开触点闭合，第二常开触点K21和第二常开触点K22均处于打开状态，以使得广播信号模块中的广播信号经升压模块进入到广播线路中，输送至扬声器中播放，同时检测开关模块断开了检测偏执模块与广播线路之间的连接，即此时广播线路中只有广播信号，没有检测信号，避免信号之间的干扰，保障了广播信号的高质量传输；检测时间内，主控模块驱使继电器K1断电、继电器K2通电，导致第一常开触点打开，第二常开触点K21和第二常开触点K22均处于闭合状态，以使得检测偏执模块与广播线路之间建立连接，检测信号通过广播线路传输至终端检测模块中，终端检测模块再将检测信号回传经广播线路进入检测采样模块中，再由主控模块通过用于连接外界设备的网络模块将检测结果反馈出去，同时升压模块与广播线路之间的连接断开，即此时广播线路中只有检测信号，没有广播信号，避免信号之间的干扰，广播线路上可以得到高质量的检测反馈信号，可以保证检测采样模块采样回去的信号是理想的信号。
对本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及形变，而所有的这些改变以及形变 都应该属于本发明权利要求的保护范围之内。

Claims (8)

  1. 一种远距离广播线路检测装置，其特征在于：包括用于提高广播信号电压的升压模块、用于驱使升压模块与广播线路之间处于导通和断路其中一种状态的线路开关模块、用于向广播线路输送检测信号的检测偏执模块、用于驱使检测偏执模块与广播线路之间处于导通和断路其中一种状态的检测开关模块、用于采集检测信号的检测采集模块和用于分析处理检测信号的主控模块，所述升压模块通过线路开关模块与广播线路连接，所述检测偏执模块通过检测开关模块与广播线路连接，所述检测开关模块的输出端与检测采集模块的输入端连接，所述监测采集模块的输出端与主控模块连接。
  2. 如权利要求1所述的远距离广播线路检测装置，其特征在于：所述线路开关模块包括驱动三极管Q1和继电器K1，所述继电器K1包括第一常开触点和与第一常开触点对应设置的第一线圈，所述升压模块的输出端通过第一常开触点与广播线路连接，所述第一线圈的一端外接电源，所述第一线圈的另一端与驱动三极管Q1的集电极连接，所述驱动三极管Q1的发射极接地，所述驱动三极管Q1的基极与主控模块的输出端连接。
  3. 如权利要求1所述的远距离广播线路检测装置，其特征在于：所述升压模块为纯无源器件。
  4. 如权利要求1所述的远距离广播线路检测装置，其特征在于：所述检测开关模块包括开关电路，所述开关电路包括继电器K2和三极管Q2，所述继电器K2包括第二常开触点K21、第二常开触点K22和第二线圈，所述检测采集模块通过第二常开触点K21与广播线路 连接，检测偏执模块通过第二常开触点K22与广播线路连接，所述第二线圈的一端外接电源，所述第二线圈的另一端与三极管Q2的集电极连接，所述三极管Q2的发射极接地，所述三极管Q2的基极与主控模块的输出端连接。
  5. 如权利要求4所述的远距离广播线路检测装置，其特征在于：所述检测开关模块还包括高压泄放电路，所述高压泄放电路包括自恢复保险丝F1、自恢复保险丝F2、压敏电阻RV1、压敏电阻RV2和气体放电管GD1，所述第二常开触点K21和压敏电阻RV1的一端均通过自恢复保险丝F1与广播线路连接，所述第二常开触点K22和压敏电阻RV2的一端均通过自恢复保险丝F2与广播线路连接，所述压敏电阻RV1的另一端和压敏电阻RV2的另一端均通过气体放电管GD1接地。
  6. 如权利要求5所述的远距离广播线路检测装置，其特征在于：所述检测开关模块还包括高压检测电路，所述高压检测电路包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、光电管S1和与光电管S1对应设置的光敏二极管D1，所述自恢复保险丝F1靠近继电器K2的一端通过电阻R2与电阻R4的一端连接，所述自恢复保险丝F2靠近继电器K2的一端通过电阻R1与电阻R3的一端连接，所述电阻R3的另一端和电阻R4的另一端均通过光电管S1接地，所述电阻R5的一端外接电源，所述电阻R5的另一端和主控模块的采集端均与光敏二极管D1的正极连接，所述光敏二极管D1的负极接地。
  7. 如权利要求1所述的远距离广播线路检测装置，其特征在于： 还包括用于连接外界设备的网络模块，所述主控模块的通信端与网络模块连接。
  8. 如权利要求1所述的远距离广播线路检测装置，其特征在于：还包括用于回传检测信号的终端检测模块，所述检测偏执模块依次通过检测开关模块、广播线路与终端检测模块的输入端连接，所述检测采集模块依次通过检测开关模块、广播线路与终端检测模块的输出端连接。
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