CN109981145B - Fire-fighting broadcast area control system and method - Google Patents
Fire-fighting broadcast area control system and method Download PDFInfo
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- CN109981145B CN109981145B CN201910252752.XA CN201910252752A CN109981145B CN 109981145 B CN109981145 B CN 109981145B CN 201910252752 A CN201910252752 A CN 201910252752A CN 109981145 B CN109981145 B CN 109981145B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
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Abstract
The application discloses a fire-fighting broadcast area control system and method. The transmission is performed by loading the broadcast signal, the control signal, and the power to the common two wires. Broadcast signals, control signals and electric power are filtered and separated by using a filtering and demodulating mode, so that the broadcast signals, the control signals and the electric power are transmitted simultaneously through two wires, and the technical problems that the number of wires is large, the cost is high and the wire penetration is troublesome in the prior art are effectively solved.
Description
Technical Field
The application relates to the field of fire-fighting broadcast area control, in particular to a fire-fighting broadcast area control system and method.
Background
The existing fire-fighting broadcasting system has a multi-wire system and a bus system, and when the multi-wire system is connected, two broadcasting wires, two signal wires and two power wires are needed; the bus system wiring adopts a two-bus technology, a power line and a signal line are combined into one, and a signal and power supply share one bus.
The common multi-wire system needs 6 wires and more wires, and when the bus system is used for wiring, the two bus systems can save the wires, but 4 wires still need to be laid, so that the number of the wires is still large, the cost is high, the wires are troublesome to penetrate through the pipes, and a large amount of manpower and material resources are consumed.
Aiming at the technical problems of multiple wires, high cost and troublesome line threading in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the disclosure provides a fire-fighting broadcast area control system and method, which at least solve the technical problems of multiple wires, high cost and troublesome wire threading in the prior art.
According to an aspect of an embodiment of the present disclosure, there is provided a fire fighting broadcast area control system including a transmission wire, a first loading device, a second loading device, a third loading device, a speaker, and a control module. The transmission wire is two wires. The first loading device, the second loading device and the third loading device are respectively connected with a transmission lead, wherein: the first loading device is used for loading the first control signal to the transmission lead and transmitting the first control signal through the transmission lead. The second loading device is used for loading the second broadcast signal to the transmission conductor and transmitting the second broadcast signal through the transmission conductor. And the third loading device is used for loading the electric power to the transmission lead and transmitting the electric power through the transmission lead. The control module is respectively connected with the transmission wire and the loudspeaker and is used for controlling the loudspeaker to play the second broadcast signal transmitted by the transmission wire according to the first control signal. And the first loading means comprises a first band-pass filter for allowing only the first control signal to pass. The second loading means includes a first low pass filter and a dc blocking capacitor for allowing only the second broadcast signal to pass therethrough. The third loading means comprises a second low-pass filter for allowing only power to pass.
Optionally, the system further includes a power separation device and a power amplification device, and the control module includes a fourth low-pass filter and a dc blocking capacitor. The power separation device is respectively connected with the transmission lead and the control module and used for separating power from the transmission lead and supplying power to the control module, wherein the power separation device comprises a third low-pass filter used for only allowing the power to pass through. The power amplifying device is connected with the second loading device and is used for amplifying the first broadcast signal with lower power into a second broadcast signal with higher power and transmitting the second broadcast signal to the second loading device. The fourth low-pass filter and the blocking capacitor are used for filtering out the second broadcast signals transmitted by the transmission conductor.
Optionally, the system further includes a first modem apparatus, and the control module further includes a second modem apparatus. The control module generates a fourth control signal containing the working state information of the control module, and the second modulation and demodulation device is used for modulating the fourth control signal to generate a fifth control signal. The first modulation and demodulation device is used for modulating the second control signal into the first control signal and transmitting the first control signal to the first loading device, and the second control signal contains information for controlling the working state of the loudspeaker. The second modulation and demodulation device is also used for demodulating the first control signal and generating a third control signal. The control module controls the working state of the loudspeaker according to the third control signal.
Optionally, in the system, the control module further includes a fourth loading device. The fourth loading device is connected with the second modulation and demodulation device and used for loading the fifth control signal to the transmission lead and transmitting the fifth control signal through the transmission lead. The first band-pass filter is also used for filtering out a fifth control signal transmitted by the transmission lead and transmitting the fifth control signal to the first modulation and demodulation device, and the first modulation and demodulation device demodulates the fifth control signal to generate a sixth control signal for monitoring the working state of the control module. The fourth loading device further comprises a third band-pass filter for allowing only the first control signal and the fifth control signal to pass through, wherein the fifth control signal is filtered out and transmitted to the transmission conductor for transmission, and the fourth loading device filters out the first control signal transmitted by the transmission conductor and transmits the first control signal to the second modem device.
Optionally, in the system, the control module further includes a second band-pass filter and a fourth loading device, and the fire-fighting broadcast area control system further includes a fourth band-pass filter. The second band-pass filter is connected with the second modulation and demodulation device and used for filtering out the first control signal transmitted by the transmission lead and transmitting the filtered first control signal to the second modulation and demodulation device, and the fourth loading device is connected with the second modulation and demodulation device and used for loading the fifth control signal to the transmission lead and transmitting the fifth control signal through the transmission lead. The fourth band-pass filter is used for filtering a fifth control signal transmitted by the transmission wire and transmitting the fifth control signal to the first modulation and demodulation device, the first modulation and demodulation device demodulates the fifth control signal to generate a sixth control signal, and the sixth control signal is used for monitoring the working state of the control module.
According to another aspect of the disclosed embodiments, there is also provided a method of fire fighting broadcast area control, including: the second broadcast signal is applied to and transmitted through the two conductors. And loading the first control signal to the two leads and transmitting the first control signal through the two leads. And applying power to and transmitting power through the two wires. Wherein the first control signal comprises information for controlling the operation of the loudspeaker.
Optionally, the method further includes: filtering and demodulating the first control signals transmitted by the two leads to generate third control signals; and controlling the operation of the loudspeaker by using a third control signal. And generating a fourth control signal, modulating the fourth control signal and generating a fifth control signal. And loading the fifth control signal to the two leads and transmitting the fifth control signal through the two leads. The fourth control signal contains information of system working state.
Optionally, the method further comprises: the second control signal is modulated into the first control signal. And filtering and demodulating the fifth control signals transmitted by the two leads to generate a sixth control signal.
Optionally, the method further comprises: amplifying the first broadcast signal into the second broadcast signal having a larger power, and. The broadcast signals transmitted by the two wires are filtered out.
Optionally, the method further comprises: and separating the power transmitted by the two wires to separate the power and supply power for the load.
In the embodiment of the disclosure, the mode of loading the broadcast signals, the control signals and the electric power to the two transmission wires is adopted, and the transmission is carried out through the two wires, so that the purpose of transmitting the electric power, the broadcast signals and the control signals through two-wire transmission is achieved, the wire rods are saved, and the technical effect of saving the wiring labor is achieved. And then solved the line that exists among the prior art and used many, with high costs to the trouble technical problem of circuit poling.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a fire fighting broadcast area control system according to a first aspect of an embodiment of the present disclosure;
FIG. 2 is a further schematic diagram of a fire broadcast area control system according to the first aspect of an embodiment of the present disclosure;
FIG. 3 is a further schematic diagram of a fire fighting broadcast area control system according to the first aspect of an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a power amplification device connection according to a first aspect of an embodiment of the disclosure;
FIG. 5 is a flow chart of a method of fire protection broadcast area control according to a second aspect of an embodiment of the present disclosure;
FIG. 6 is a further flowchart of a method of fire protection broadcast area control according to a second aspect of an embodiment of the present disclosure; and
fig. 7 is a further flowchart of a method of fire fighting broadcast area control according to a second aspect of an embodiment of the present disclosure.
The transmission line 110, the first loading device 121, the second loading device 122, the third loading device 123, the first band-pass filter 124, the first low-pass filter 125, the dc blocking capacitor 126, the second low-pass filter 127, the second band-pass filter 128, the fourth loading device 129, the third band-pass filter 130, the fourth band-pass filter 131, the third low-pass filter 132, the fourth low-pass filter 133, the dc blocking capacitor 134, the control module 140, the first modem 151, the second modem 152, the speaker 160, the power amplifier 170, and the power splitter 180.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Examples
According to a first aspect of the embodiments of the present invention, there is provided a fire fighting broadcast area control system including a transmission wire 110, a first loading device 121, a second loading device 122, a third loading device 123, a speaker 160, and a control module 140. The transmission wire 110 is two wires. The first loading device 121, the second loading device 122, and the third loading device 123 are respectively connected to the transmission line 110, wherein: the first loading device 121 is configured to load the first control signal to the transmission line 110 and transmit the first control signal through the transmission line 110. The second loading device 122 is used for loading the second broadcast signal to the transmission conductor 110 and transmitting the second broadcast signal through the transmission conductor 110. And the third loading device 123 is used for loading the power to the transmission conductor 110 and transmitting the power through the transmission conductor 110. The control module 140 is connected to the transmission conductor 110 and the speaker 160, respectively, and the control module 140 is configured to control the speaker 160 to play the second broadcast signal transmitted by the transmission conductor 110 according to the first control signal. And the first loading means 121 comprises a first band pass filter 124 for allowing only the first control signal to pass. The second loading means 122 includes a first low pass filter 125 and a dc blocking capacitor 126 for allowing only the second broadcast signal to pass. The third loading means 123 comprises a second low pass filter 127 for allowing only power to pass.
Specifically, in the present embodiment, as shown in fig. 1, fig. 2 and fig. 3, the fire fighting broadcast area control system includes a transmission line 110, a first loading device 121, a second loading device 122, a third loading device 123, a speaker 160 and a control module 140, wherein the first loading device 121, the second loading device 122 and the third loading device 123 respectively load a first control signal, a second broadcast signal and power onto the transmission line 110, and transmit the power, the first control signal and the second broadcast signal through the transmission line 110, and avoid interference to the power system, the second broadcast signal circuit and the first control signal circuit during the loading process. In this embodiment, the power is direct current. The first loading device 121 includes a first band pass filter 124, and uses the frequency selective characteristic of the first band pass filter 124 to load the first control signal onto the transmission conductor 110 and isolate the power and the second broadcast signal, so as to prevent the power, the second broadcast signal and other signals from interfering with the first control signal circuit.
The second loading device 122 includes a first low pass filter 125 and a dc blocking capacitor 126, and loads the second broadcast signal to the transmission line 110 by using the frequency selective characteristic of the first low pass filter 125 and the dc blocking capacitor 126 to block the transmission of the dc power, and isolates the first control signal from the power, thereby preventing the first control signal, the power and other signals from interfering with the second broadcast signal circuit.
The third loading device 123 includes a second low pass filter 127, and uses the frequency selective characteristic of the second low pass filter 127 to load power to the transmission line 110 and isolate the first signal and the second broadcast signal, thereby preventing the first signal, the second broadcast signal and other signals from interfering with the power system.
The first control signal includes information for controlling the operating state of the speaker 160, and the control module 140 switches the operating state of the speaker 160 according to the control information included in the first control signal.
According to the scheme, the first loading device 121, the second loading device 122 and the third loading device 123 are used for loading the second broadcast signals, the first control signals and the electric power to 2 leads for transmission, and a solution is provided for the technical problems that in the prior art, the number of wires is large, the cost is high, and the wires are troublesome to penetrate through.
Optionally, the system further comprises a power splitting device 180 and a power amplifying device 170, and the control module arrangement 140 comprises a fourth low-pass filter 133 and a dc blocking capacitor 134. Wherein the power splitting device 180 is connected to the transmission conductor 110 and the control module 140, respectively, and is configured to split power from the transmission conductor 110 and supply power to the control module 140, wherein the power splitting device 180 includes a third low pass filter 132 configured to allow only power to pass through. The power amplifying device 170 is connected to the second loading device 122, and is configured to amplify the first broadcast signal with lower power into a second broadcast signal with higher power, and transmit the second broadcast signal to the second loading device 122. The fourth low pass filter 133 and the dc blocking capacitor 134 are used to filter out the second broadcast signal transmitted by the transmission line 110.
Specifically, in the present embodiment, referring to fig. 1, fig. 2, and fig. 3, the power separation device 180 supplies power to the control module 140 by using the power separated by the frequency selective characteristic of the third low-pass filter 132, so that no power line needs to be additionally installed for supplying power, and the purposes of saving wires and reducing the trouble of threading the line are achieved.
The power amplifying device 170 is connected to the second loading device 122, as shown in fig. 1 to fig. 4, and is configured to amplify the first broadcast signal with lower power into the second broadcast signal with higher power, and provide an audio electrical signal with a certain power to the speaker 160, and load the signal with amplified power onto the transmission wire 110 through the second loading device 122 for transmission.
The fourth low pass filter 133 filters the second broadcast signal, thereby completing the loading, transmission and reception processes of the second broadcast signal.
Preferably, the fire-fighting broadcast area control system further includes a first modem 151, and the control module 140 further includes a second modem 152. The control module 140 generates a fourth control signal containing the operating state information of the control module 140, and the second modulation and demodulation device 152 is configured to modulate the fourth control signal and generate a fifth control signal. The first modulation and demodulation device 151 is configured to modulate a second control signal into a first control signal and transmit the first control signal to the first loading device 121, where the second control signal includes information for controlling the operating state of the speaker 160. The second modulation and demodulation device 152 is further configured to demodulate the first control signal to generate a third control signal. The control module 140 controls the operation state of the speaker 160 according to the third control signal.
Specifically, in this embodiment, referring to fig. 1, fig. 2 and fig. 3, the control module generates the fourth control signal according to the working state, and the system may monitor the working state of the control module 140 at any time according to the working state information of the control module 140 included in the fourth control signal.
The second modem 152 is configured to modulate the fourth control signal to generate a fifth control signal, i.e. load the fourth control signal to a certain frequency, which is ready for transmission on the transmission line 110.
The first modulation and demodulation means 151 is used for modulating the second control signal containing the information for controlling the working state of the loudspeaker 160 into the first control signal and transmitting the first control signal to the first loading means 121, and the second modulation and demodulation means 152 is also used for demodulating the first control signal and generating the third control signal. The control module 140 controls the operation state of the speaker 160 according to the third control signal. That is, the first control signal, the second control signal, and the third control signal are actually signals for transmitting information for controlling the operation state of the speaker 160, and are different specific forms at each stage of transmission. Therefore, by the scheme, in order to ensure that the signal for controlling the working state of the loudspeaker does not interfere with other signals in the transmission process, the whole process of transmission and reception on the transmission lead 110 is completed by the steps of modulating, loading, transmitting, filtering, demodulating and the like on the control signal, and the purpose of transmitting the signal on the same lead with other signals is realized.
Preferably, in the above system, the control module 140 further comprises a fourth loading device 129. The fourth loading device 129 is connected to the second modem 152, and is configured to load the fifth control signal to the transmission line 110, and transmit the fifth control signal through the transmission line 110. The first band-pass filter 124 is further configured to filter out a fifth control signal transmitted by the transmission conductor 110, and transmit the fifth control signal to the first modem 151, and the first modem 151 demodulates the fifth control signal to generate a sixth control signal, which is used to monitor the operating state of the control module 140. The fourth loading means 129 further comprises a third band-pass filter 130 for allowing only the first control signal and the fifth control signal to pass through, wherein the fifth control signal is filtered out and transmitted to the transmission conductor 110 for transmission, and the fourth loading means 129 filters out the first control signal transmitted by the transmission conductor 110 and transmits the first control signal to the second modem means 152.
Specifically, as shown in fig. 2, the fourth loading device 129 loads the fifth control signal onto the transmission line 110 for transmission. The third bandpass filter 130 included in the fourth loading device 129, by using the frequency selection characteristic of the third bandpass filter 130, not only prevents peripheral signals from entering the loading device and prevents interference to the loading device, but also filters the first control signal and transmits the first control signal to the second modem 152, and the second modem 152 demodulates the first control signal. The first band-pass filter 124 is further configured to filter out a fifth control signal transmitted by the transmission conductor 110, and transmit the fifth control signal to the first modem 151, and the first modem 151 demodulates the fifth control signal to generate a sixth control signal for monitoring the operating state of the control module 140. Thereby completing the overall process of transmission and reception of power, broadcast signals, and modulation and demodulation of control signals.
In addition, according to the physical characteristics of the first band pass filter 124 and the third band pass filter 130, the first control signal, the second control signal, the first control signal, the fourth control signal, the fifth control signal, and the sixth control signal may be alternatively loaded and transmitted, that is, the working state is in a half-duplex state, which is more beneficial to thoroughly solving the mutual interference of the signals.
Preferably, the control module 140 further includes a second band-pass filter 128 and a fourth loading device 129, and the fire broadcasting area control system further includes a fourth band-pass filter 131. The second band-pass filter 128 is connected to the second modem 152, and is configured to filter the first control signal transmitted by the transmission line 110 and transmit the filtered first control signal to the second modem 152, and the fourth loading device 129 is connected to the second modem 152, and is configured to load the fifth control signal to the transmission line 110 and transmit the fifth control signal through the transmission line 110. The fourth bandpass filter 131 is configured to filter the fifth control signal transmitted by the transmission wire 110, and transmit the fifth control signal to the first modem 151, where the first modem 151 demodulates the fifth control signal to generate a sixth control signal, and the sixth control signal is used to monitor the operating state of the control module 140.
Specifically, in the present embodiment, as shown in fig. 3, the fourth loading device 129 loads the fifth control signal onto the transmission conducting wire 110 for transmission. In addition, the third bandpass filter 130 included in the fourth loading unit 129 prevents peripheral signals from entering the loading unit, and prevents interference with the loading unit. The second band-pass filter 128 filters out the first control signal, and transmits the first control signal to the second modem 152, and the second modem 152 demodulates the first control signal. The fourth bandpass filter 131 is configured to filter out the fifth control signal transmitted by the transmission wire 110, and transmit the fifth control signal to the first modem 151, and the first modem 151 demodulates the fifth control signal to generate a sixth control signal for monitoring the operating state of the control module 140, and the fourth control signal, the fifth control signal, and the sixth control signal are also substantially one signal. Thus, the whole process of transmission and reception of power and broadcast signals and modulation, transmission and demodulation of control signals is completed according to the scheme.
Thus according to a first aspect of the present embodiment, there is provided a fire fighting broadcast area control system. In this system, broadcast signals, control signals, and power are transmitted together over two wires. Through using the loading device, broadcast signal, control signal and electric power loading to two piece common transmission wire, and can not lead to the fact the influence to respective circuit, and use modulation device to modulate control signal, avoided mutual interference in transmission process, thereby realized transmitting broadcast signal, control signal and electric power through two wires simultaneously, and through devices such as demodulating equipment, wave filter, power amplifier, the effectual line that has solved existence among the prior art is many, with high costs, and the trouble technical problem is managed in the circuit poling.
According to a second aspect of the embodiments of the present disclosure, there is provided a fire fighting broadcast area control method, including:
s302, loading a second broadcast signal to the two leads and transmitting the second broadcast signal through the two leads;
and S304, loading a first control signal to the two leads and transmitting the first control signal through the two leads. And
and S306, loading power to the two leads and transmitting the power through the two leads. Wherein the first control signal comprises information for controlling the operation of the loudspeaker.
Specifically, as shown in fig. 5, 3 steps are included, in which the second broadcast signal, the first control signal, and the power are applied to the same two wires, respectively, and transmitted through the two wires. Wherein the first control signal contains information for controlling the operation of the loudspeaker. The loading process is a process of introducing the second broadcast signal, the first control signal, and power into the wire. The second broadcast signal, the first control signal and the electric power are simultaneously led into the conducting wire, and each one needs to ensure that the other two signals and other signals do not influence the conducting wire, so that the loading device of the first aspect of the embodiment needs to be used, and the loading device is kept isolated from other circuits to prevent interference, so that the second broadcast signal circuit, the first control signal and the electric power can be simultaneously transmitted by using two conducting wires, and a solution is provided for the technical problems of multiple wires, high cost and troublesome line penetration in the prior art.
Preferably, the method further comprises:
s402: filtering and demodulating the first control signals transmitted by the two leads to generate third control signals;
s404: and controlling the operation of the loudspeaker by using a third control signal.
S502: generating a fourth control signal;
s504: modulating the fourth control signal to generate a fifth control signal;
s506: and loading a fifth control signal to the two leads and transmitting the fifth control signal through the two leads.
The fourth control signal contains information of system working state.
Specifically, in the present embodiment, as shown in fig. 6, the method includes filtering and demodulating the transmitted first control signal, generating a third control signal, and controlling the operation of the speaker by using the third control signal, thereby realizing the transmission of the control signal on the two wires and controlling the operation state of the speaker by using the control signal. As shown in fig. 7, the method further includes generating a fourth control signal, modulating the fourth control signal, and generating a fifth control signal; and loading a fifth control signal to the two leads and transmitting the fifth control signal through the two leads. And modulating the fourth control signal containing the system working state information, and loading the generated modulated signal to a wire for transmission, so that mutual interference among signals in the transmission process can be avoided.
Preferably, the method further comprises modulating the second control signal into the first control signal. And filtering and demodulating the fifth control signals transmitted by the two leads to generate a sixth control signal.
Specifically, in the present embodiment, the first control signal in the above method is generated by modulating the second control signal, that is, the first control signal, the second control signal, and the third control signal are essentially one signal, and are modulated to a certain frequency and a certain specification only for preventing interference during transmission. Similarly, the fifth control signal is demodulated to generate the sixth control signal, i.e., the fourth control signal, the fifth control signal, and the sixth control signal are also essentially one signal, and each signal has a different form during transmission. And through the loading, modulation and demodulation in the method, the problem of mutual interference existing in the transmission of various signals on two wires is effectively solved, the transmission of various signals on the two wires is realized, and mutual interference does not exist, so that the method is provided for solving the technical problems of multiple wire utilization, high cost and troublesome wire threading in the prior art.
Preferably, the method further comprises amplifying the first broadcast signal into a second broadcast signal with higher power, and filtering out the broadcast signals transmitted by the two wires.
Specifically, in the present embodiment, the first broadcast signal is amplified to provide the second broadcast signal with a larger power to the speaker. In order to enable the loudspeaker to play the volume meeting the actual requirement, the low-power broadcast signal needs to be subjected to power amplification, and the amplified signal is loaded to two wires for transmission, so that the cost of wire wiring is saved. And, the second broadcast signal of will transmitting filters, blocks power and control signal, generates the second broadcast signal of the purity, thus has reached the purpose to transmit the second broadcast signal through two wires.
Preferably, the method further comprises: and separating the electric power transmitted by the two wires to separate the electric power and supply power for the equipment.
Specifically, in the present embodiment, the power in the two wires is separated, and the power is separated to supply power to each electrical device. Through the separation, can filter other signals and interference, obtain stable electric power, enable the electrical equipment operation more steadily, reduce the generation of noise.
Thus, according to another aspect of the present embodiment, there is provided a method of fire fighting broadcast area control. Different control signals are modulated to different frequencies mainly in a modulation mode, and the second broadcast signals, the control signals and power are loaded to two common wires for transmission. The second broadcast signal, the control signal and the electric power are separated by adopting a filtering and separating method, and the corresponding control signal is demodulated by using a demodulating mode, so that the second broadcast signal, the control signal and the electric power are simultaneously transmitted through two leads, and the technical problems of more wires, high cost and troublesome line penetration in the prior art are effectively solved.
According to the embodiment, the fire-fighting broadcast area control system and the fire-fighting broadcast area control method are provided, the broadcast signals, the control signals and the electric power are loaded to the two transmission wires and transmitted through the two wires, and the purpose that the electric power, the broadcast signals and the control signals can be transmitted through two-wire transmission is achieved, so that the technical effects of saving wires and saving wiring labor are achieved. And then solved the line that exists among the prior art and used many, with high costs to the trouble technical problem of circuit poling.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
In addition, the above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the merits of the embodiments. In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A fire-fighting broadcast area control system comprising a transmission wire (110), a first loading device (121), a second loading device (122), a third loading device (123), a speaker (160), and a control module (140),
the transmission wire (110) is two wires,
the first loading device (121), the second loading device (122), and the third loading device (123) are respectively connected to the transmission line (110), wherein:
the first loading device (121) is used for loading a first control signal to the transmission lead (110) and transmitting the first control signal through the transmission lead (110);
the second loading device (122) is used for loading a second broadcast signal to the transmission conductor (110) and transmitting the second broadcast signal through the transmission conductor (110); and
the third loading device (123) is used for loading electric power to the transmission lead (110) and transmitting the electric power through the transmission lead (110);
the control module (140) is respectively connected with the transmission conductor (110) and the loudspeaker (160), and the control module (140) is used for controlling the loudspeaker (160) to play the second broadcast signal transmitted by the transmission conductor (110) according to the first control signal; and is
Said first loading means (121) comprises a first band-pass filter (124) for allowing only said first control signal to pass;
the second loading device (122) comprises a first low-pass filter (125) and a blocking capacitor (126) for allowing only the second broadcast signal to pass;
-said third loading means (123) comprise a second low-pass filter (127) for allowing only said electric power to pass;
the fire fighting broadcast area control system further comprises: a power splitting device (180) and a power amplifying device (170), the control module (140) being configured to include a fourth low pass filter (133) and a dc blocking capacitance (134), wherein,
the power separation device (180) is respectively connected with the transmission conductor (110) and the control module (140) and is used for separating power from the transmission conductor (110) and supplying power to the control module (140), wherein,
-the power splitting means (180) comprises a third low pass filter (132) for allowing only the power to pass;
the power amplifying device (170) is connected to the second loading device (122) and configured to amplify the first broadcast signal with lower power into the second broadcast signal with higher power and transmit the second broadcast signal to the second loading device (122);
the fourth low-pass filter (133) and the dc blocking capacitor (134) are used for filtering out a second broadcast signal transmitted by the transmission conductor (110); and
the fire fighting broadcast area control system further comprises a first modem means (151), the control module (140) is configured to further comprise a second modem means (152), wherein,
the control module (140) generates a fourth control signal containing operating state information of the control module (140),
the second modulation and demodulation device (152) is used for modulating the fourth control signal and generating a fifth control signal;
the first modulation and demodulation device (151) is configured to modulate a second control signal into the first control signal and transmit the first control signal to the first loading device (121), where the second control signal includes information for controlling an operating state of the speaker (160);
the second modulation and demodulation device (152) is further used for demodulating the first control signal to generate a third control signal;
the control module (140) controls the working state of the loudspeaker (160) according to the third control signal.
2. Fire fighting broadcast area control system according to claim 1, characterized in that the control module (140) further comprises a fourth loading device (129), wherein,
the fourth loading device (129) is connected with the second modulation and demodulation device (152) and is used for loading the fifth control signal to the transmission lead (110) and transmitting the fifth control signal through the transmission lead (110);
the first band-pass filter (124) is further configured to filter out the fifth control signal transmitted by the transmission conductor (110), and transmit the fifth control signal to the first modem device (151), and the first modem device (151) demodulates the fifth control signal to generate a sixth control signal for monitoring the operating state of the control module (140);
the fourth loading device (129) further comprises a third band-pass filter (130) for allowing only the first control signal and the fifth control signal to pass, wherein the fifth control signal is filtered out and transmitted to the transmission line (110) for transmission, and the fourth loading device (129) filters out the first control signal transmitted by the transmission line (110) and transmits the first control signal to the second modem device (152).
3. The fire fighting broadcast zone control system of claim 1, wherein the control module (140) further comprises a second band pass filter (128) and a fourth loading device (129), the fire fighting broadcast zone control system further comprising a fourth band pass filter (131), wherein,
said second band-pass filter (128) being connected to said second modem means (152) for filtering said first control signal transmitted by said transmission line (110) and for transmitting said filtered first control signal to said second modem means (152),
the fourth loading device (129) is connected with the second modulation and demodulation device (152) and is used for loading the fifth control signal to the transmission lead (110) and transmitting the fifth control signal through the transmission lead (110);
the fourth band-pass filter (131) is configured to filter the fifth control signal transmitted by the transmission wire (110), and transmit the fifth control signal to the first modulation and demodulation device (151), the first modulation and demodulation device (151) demodulates the fifth control signal to generate a sixth control signal, and the sixth control signal is configured to monitor a working state of the control module (140).
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| JPH0879140A (en) * | 1994-08-31 | 1996-03-22 | Yamatake Honeywell Co Ltd | Two-wire communication equipment |
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