A control system for off-site automatic launching

Abstract

The utility model discloses a control system for the automatic emission of the place, including main control unit, signal detection module, communication module, execution switching module and power management module, and main control unit is equipped with data processing interface, control signal output end and communication interface, and the input of signal detection module is coupled to the main signal path of transmitter, and the output is connected to main control unit, and communication module and main control unit electric connection, and execution switching module is connected between main control unit and external controlled equipment. The utility model discloses through signal detection module real -time acquisition main transmitter's radio frequency power and audio state, when detecting the trouble signal, and main control unit sends control instruction to the place spare radio station through communication module, and execution switching module drives radio frequency switch and spare transmitter to carry out signal takeover after receiving control signal, realizes the automatic discrimination of the fault of whole hardware architecture and the place emergency switching, and has promoted the effect of system reliability and response speed.

Description

Technical Field

[0001] This utility model relates to the field of broadcast television transmission monitoring technology, and in particular to a control system for remote automatic transmission. Background Technology

[0002] Provincial and municipal radio and television transmission stations undertake the wireless transmission of multiple radio and television programs. To ensure safe broadcasting, they are usually equipped with off-site transmission systems as backups. The existing off-site transmission systems mainly rely on manual operation. When the main transmission station fails, technicians need to manually turn on the relevant off-site backup equipment.

[0003] The existing switching methods have obvious drawbacks: the whole process requires high technical skills from the on-duty personnel, especially in the event of a sudden failure, where personnel need to complete the correct operation in a very short time, and the slightest carelessness may cause a broadcast interruption; in addition, the existing remote control equipment often lacks hardware protection against radio frequency interference and dual-link communication guarantee, and is prone to loss of connection or malfunction under extreme working conditions.

[0004] Therefore, this application proposes a control system for remote automatic launch to solve the problems of low efficiency, poor fault tolerance, and insufficient hardware reliability of manual switching in the prior art. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a control system for automatic remote transmission, which solves the problems of relying on manual intervention, slow response speed and insufficient hardware reliability in the emergency switching of broadcast transmission stations in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A control system for remote automatic transmission includes a main control unit, a signal detection module, a communication module, an execution switching module, and a power management module. The main control unit is equipped with a data processing interface, a control signal output terminal, and a communication interface; The input terminal of the signal detection module is coupled to the main signal path of the transmitter, and the output terminal of the signal detection module is connected to the data processing interface of the main control unit, which is used to convert the collected transmitter operating status signal into a level signal. The communication module is electrically connected to the communication interface of the main control unit, and is used to establish a data transmission link between the main control unit and the remote backup radio. The input terminal of the execution switching module is connected to the control signal output terminal of the main control unit, and the output terminal of the execution switching module is connected to the trigger port of the radio frequency switch motor circuit and the backup transmitter. The power management module is electrically connected to the main control unit, signal detection module, communication module and execution switching module respectively, and is used to provide operating voltage.

[0007] Preferably, the signal detection module includes an RF power detection unit, which includes an RF input interface, an attenuation network, a logarithmic detector circuit, and an analog-to-digital converter interface connected in series. The RF input interface is connected to the input of the attenuation network via an impedance matching transmission line, and the output of the logarithmic detector circuit is connected to the analog-to-digital converter pin of the main control unit.

[0008] Preferably, the signal detection module further includes an audio status detection unit, which includes an audio isolation transformer and a rectifier-integrator circuit; the primary side of the audio isolation transformer is connected to an audio signal source, the secondary side is connected to the input terminal of the rectifier-integrator circuit, and the output terminal of the rectifier-integrator circuit is connected to the sampling terminal of the main control unit.

[0009] Preferably, the communication module includes a wired communication unit and a wireless communication unit; the wired communication unit includes an Ethernet physical layer transceiver and a network transformer, the Ethernet physical layer transceiver being connected between the main control unit and the network transformer; the wireless communication unit includes a wireless cellular module and a level conversion circuit, the data port of the wireless cellular module being connected to the serial communication interface of the main control unit through the level conversion circuit.

[0010] Preferably, the execution switching module includes an opto-isolation unit, a drive amplification unit, and a relay group; the input side of the opto-isolation unit is connected to the control signal output terminal of the main control unit, and the output side is connected to the input terminal of the drive amplification unit; the output terminal of the drive amplification unit is connected to the coil drive terminal of the relay group, and the contact terminals of the relay group are connected to an external controlled device.

[0011] Preferably, the power management module includes a power-down retention circuit; the power-down retention circuit includes a main power supply bus, a unidirectional conducting element, and a supercapacitor energy storage group; the main power supply bus is connected to the power input terminal of the main control unit through the unidirectional conducting element, and the supercapacitor energy storage group is connected in parallel between the cathode of the unidirectional conducting element and ground.

[0012] Preferably, it also includes a hardware watchdog circuit, wherein the feed signal input terminal of the hardware watchdog circuit is connected to the first general-purpose input / output pin of the main control unit, and the reset output terminal of the hardware watchdog circuit is connected to the hardware reset pin of the main control unit.

[0013] As described above, the control system for remote automatic launch according to this utility model has the following beneficial effects: 1. This utility model uses a logarithmic detector circuit and an audio rectification and integration circuit in the signal detection module to acquire analog quantities of radio frequency power and audio amplitude respectively, avoiding misjudgment of simple switch quantity detection and realizing accurate fault identification.

[0014] 2. This utility model adopts a dual-link design of Ethernet and wireless modules in the communication module, which ensures that control commands can still be transmitted when a single link is interrupted, greatly improving the communication reliability of the system.

[0015] 3. This utility model adopts opto-isolation and Darlington drive structure in the execution switching module, which effectively isolates the high voltage and strong electromagnetic interference at the transmitter end, protects the safety of the main control unit, and enhances the system's emergency handling capability in the event of power failure through the power-off retention circuit.

[0016] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0017] Figure 1 This is a block diagram of the overall hardware architecture of this utility model.

[0018] Figure 2 This is a detailed block diagram illustrating the connection principle between the main control unit and the peripheral functional circuits in this utility model.

[0019] Figure 3 This is a schematic diagram of the hardware signal flow of the system of this utility model.

[0020] In the diagram: 1. Main control unit; 2. Signal detection module; 21. RF power detection unit; 211. RF input interface; 212. Attenuation network; 213. Logarithmic detector circuit; 214. Analog-to-digital converter interface; 22. Audio status detection unit; 221. Audio isolation transformer; 2220. Rectifier-integrator circuit; 3. Communication module; 31. Wired communication unit; 311. Ethernet physical layer transceiver; 312. Network transformer; 32. Wireless communication unit; 321. Wireless cellular module; 322. Level conversion circuit; 4. Execution switching module; 41. Opto-isolation unit; 42. Drive amplifier unit; 43. Relay group; 5. Power management module; 51. Power-down retention circuit; 6. Hardware watchdog circuit. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0022] like Figure 1-3As shown, this utility model provides a control system for remote automatic transmission, including a main control unit 1, a signal detection module 2, a communication module 3, an execution switching module 4, and a power management module 5.

[0023] The main control unit 1 is equipped with a data processing interface, a control signal output terminal and a communication interface. As the core logic processing component of the system, the main control unit 1 uses an industrial-grade microcontroller, such as the STM32 series chip, which is connected to the various functional interfaces through an internal bus.

[0024] The input terminal of the signal detection module 2 is coupled to the main signal path of the transmitter, and the output terminal of the signal detection module 2 is connected to the data processing interface of the main control unit 1 to convert the acquired transmitter operating status signal into a level signal.

[0025] The communication module 3 is electrically connected to the communication interface of the main control unit 1 to establish a data transmission link between the main control unit 1 and the remote backup radio.

[0026] The input terminal of the switching module 4 is connected to the control signal output terminal of the main control unit 1, and the output terminal of the switching module 4 is connected to the RF switch motor circuit and the trigger port of the backup transmitter.

[0027] The power management module 5 is electrically connected to the main control unit 1, the signal detection module 2, the communication module 3, and the execution switching module 4, respectively, to provide the operating voltage.

[0028] In one embodiment, please refer to Figure 2 The signal detection module 2 includes an RF power detection unit 21, which includes an RF input interface 211, an attenuation network 212, a logarithmic detector circuit 213, and an analog-to-digital converter interface 214 connected in series. The RF input interface 211 is connected to the input of the attenuation network 212 through an impedance matching transmission line, and the output of the logarithmic detector circuit 213 is connected to the analog-to-digital converter pin of the main control unit 1. Specifically, the RF input interface 211 is connected to the attenuation network 212 through a microstrip line. The attenuation network 212 is composed of a π-type network of precision resistors, which is used to match the impedance and attenuate the input level. The logarithmic detector circuit 213 uses an RF logarithmic detector chip, such as the AD8317, which can convert the power value of the input RF signal into a linear DC voltage output, which is directly routed to the ADC input pin of the main control unit 1.

[0029] In one embodiment, please refer to Figure 2The signal detection module 2 also includes an audio status detection unit 22, which includes an audio isolation transformer 221 and a rectifier-integrator circuit 2220. The primary side of the audio isolation transformer 221 is connected to the audio signal source, and the secondary side is connected to the input terminal of the rectifier-integrator circuit 2220. The output terminal of the rectifier-integrator circuit 2220 is connected to the sampling terminal of the main control unit 1. Specifically, the audio isolation transformer 221 is a 600Ω:600Ω permalloy transformer to eliminate ground loop interference. The rectifier-integrator circuit 2220 includes a precision rectifier circuit composed of operational amplifiers and an RC integration network to convert the dynamically changing audio signal into a smooth DC envelope voltage.

[0030] In one embodiment, please refer to Figure 2 The communication module 3 includes a wired communication unit 31 and a wireless communication unit 32. The wired communication unit 31 includes an Ethernet physical layer transceiver 311 and a network transformer 312. The Ethernet physical layer transceiver 311 is connected between the main control unit 1 and the network transformer 312. The wireless communication unit 32 includes a wireless cellular module 321 and a level conversion circuit 322. The data port of the wireless cellular module 321 is connected to the serial communication interface of the main control unit 1 through the level conversion circuit 322. Specifically, the Ethernet physical layer transceiver 311 uses the LAN8720A chip and is connected to the main control unit 1 through the RMII interface. The wireless cellular module 321 uses a 4G full-network compatible module, such as the EC20.

[0031] In one embodiment, please refer to Figure 2 The switching module 4 includes an opto-isolation unit 41, a drive amplifier unit 42, and a relay group 43. The input side of the opto-isolation unit 41 is connected to the control signal output terminal of the main control unit 1, and the output side is connected to the input terminal of the drive amplifier unit 42. The output terminal of the drive amplifier unit 42 is connected to the coil drive terminal of the relay group 43, and the contact terminals of the relay group 43 are connected to the external controlled device. Specifically, the opto-isolation unit 41 uses an optocoupler, such as EL817, to achieve electrical isolation of the control signal. The drive amplifier unit 42 uses a Darlington transistor array, such as ULN2003. The normally open contacts of the relay group 43 are connected in series in the PTT control line of the coaxial switching motor power supply and the backup transmitter.

[0032] In one embodiment, please refer to Figure 2 The power management module 5 includes a power-down retention circuit 51, which includes a main power supply bus, a unidirectional conducting element, and a supercapacitor energy storage group. The main power supply bus is connected to the power input terminal of the main control unit 1 through the unidirectional conducting element, and the supercapacitor energy storage group is connected in parallel between the cathode of the unidirectional conducting element and ground. When the external power is cut off, the unidirectional conducting element is cut off, and the supercapacitor energy storage group discharges in reverse to maintain the operation of the main control unit 1.

[0033] In one embodiment, please refer to Figure 1 It also includes a hardware watchdog circuit 6. The feed signal input terminal of the hardware watchdog circuit 6 is connected to the first general-purpose input / output pin of the main control unit 1, and the reset output terminal of the hardware watchdog circuit 6 is connected to the hardware reset pin of the main control unit 1. Specifically, the hardware watchdog circuit 6 uses a dedicated reset chip, such as SP706. If the main control unit 1 crashes and stops toggling the level, the reset chip will force a system reset.

[0034] The specific usage process of this utility model is as follows: After the system is powered on, the signal detection module 2 collects the radio frequency power voltage value and audio amplitude voltage value of the transmitter in real time. The main control unit 1 processes the data through an internal algorithm. When the radio frequency power is detected to be lower than the preset threshold and the duration exceeds the judgment window, the main control unit 1 determines that the host is faulty.

[0035] At this time, the main control unit 1 first sends a command to the remote server through the wired communication unit 31 or the wireless communication unit 32 of the communication module 3; then, the main control unit 1 pulls up the control pin level and drives the relay group 43 to operate through the opto-isolation unit 41 and the drive amplifier unit 42.

[0036] Relay group 43 is activated, connecting the RF switch motor circuit and the trigger port of the backup transmitter, thereby restoring the transmission of the broadcast signal in a very short time.

[0037] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A control system for off-site automatic launch, characterized by, The system includes a main control unit (1), a signal detection module (2), a communication module (3), an execution switching module (4), and a power management module (5). The main control unit (1) is equipped with a data processing interface, a control signal output terminal, and a communication interface. The input terminal of the signal detection module (2) is coupled to the main signal path of the transmitter, and the output terminal of the signal detection module (2) is connected to the data processing interface of the main control unit (1) to convert the collected transmitter operating status signal into a level signal. The communication module (3) is connected to the main control unit. (1) is electrically connected to the communication interface to establish a data transmission link between the main control unit (1) and the remote backup radio station; the input terminal of the execution switching module (4) is connected to the control signal output terminal of the main control unit (1), and the output terminal of the execution switching module (4) is connected to the RF switch motor circuit and the trigger port of the backup transmitter; the power management module (5) is electrically connected to the main control unit (1), the signal detection module (2), the communication module (3) and the execution switching module (4) respectively to provide working voltage.

2. The control system for remote automatic launch according to claim 1, characterized in that, The signal detection module (2) includes an RF power detection unit (21), which includes an RF input interface (211), an attenuation network (212), a logarithmic detector circuit (213), and an analog-to-digital converter interface (214) connected in series. The RF input interface (211) is connected to the input end of the attenuation network (212) through an impedance matching transmission line, and the output end of the logarithmic detector circuit (213) is connected to the analog-to-digital converter pin of the main control unit (1).

3. A control system for remote automatic launch according to claim 1, characterized in that, The signal detection module (2) further includes an audio status detection unit (22), which includes an audio isolation transformer (221) and a rectifier-integrator circuit (2220). The primary side of the audio isolation transformer (221) is connected to an audio signal source, and the secondary side is connected to the input terminal of the rectifier-integrator circuit (2220). The output terminal of the rectifier-integrator circuit (2220) is connected to the sampling terminal of the main control unit (1).

4. A control system for remote automatic launch according to claim 1, characterized in that, The communication module (3) includes a wired communication unit (31) and a wireless communication unit (32); the wired communication unit (31) includes an Ethernet physical layer transceiver (311) and a network transformer (312), the Ethernet physical layer transceiver (311) being connected between the main control unit (1) and the network transformer (312); the wireless communication unit (32) includes a wireless cellular module (321) and a level conversion circuit (322), the data port of the wireless cellular module (321) being connected to the serial communication interface of the main control unit (1) through the level conversion circuit (322).

5. A control system for remote automatic launch according to claim 1, characterized in that, The execution switching module (4) includes an opto-isolation unit (41), a drive amplification unit (42), and a relay group (43). The input side of the opto-isolation unit (41) is connected to the control signal output terminal of the main control unit (1), and the output side is connected to the input terminal of the drive amplification unit (42). The output terminal of the drive amplification unit (42) is connected to the coil drive terminal of the relay group (43), and the contact terminals of the relay group (43) are connected to the external controlled device.

6. A control system for remote automatic transmission according to claim 1, characterized in that, The power management module (5) includes a power-down retention circuit (51); the power-down retention circuit (51) includes a main power supply bus, a unidirectional conducting element and a supercapacitor energy storage group; the main power supply bus is connected to the power input terminal of the main control unit (1) through the unidirectional conducting element, and the supercapacitor energy storage group is arranged in parallel between the cathode of the unidirectional conducting element and ground.

7. A control system for remote automatic launch according to claim 1, characterized in that, It also includes a hardware watchdog circuit (6), the dog-feeding signal input terminal of the hardware watchdog circuit (6) is connected to the first general-purpose input / output pin of the main control unit (1), and the reset output terminal of the hardware watchdog circuit (6) is connected to the hardware reset pin of the main control unit (1).

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