Power and temperature acquisition device of broadcast transmitter

Abstract

The utility model relates to the technical field of radio and television engineering. The power and temperature acquisition device of the broadcast transmitter comprises a shell, a main board, a core board, a detection box and a sensing assembly, the main board, the core board and the detection box are all arranged in the shell, and the core board, the detection box and the sensing assembly are all connected with the main board; wherein the detection box is used for acquiring power information of a transmitter; the sensing assembly is used for acquiring temperature information of the transmitter. The power information of the transmitter is specially acquired through the independent detection box, the problem of resource allocation tension caused by the fact that a traditional main control module processes multiple types of data at the same time is avoided, and the problems that in an existing broadcast transmitter monitoring system, power acquisition precision is insufficient, protection response is lagged, expansibility and compatibility are poor, and the cost is low are solved. Equipment faults occur frequently, the system reliability is reduced, and the operation and maintenance pressure is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of broadcast television engineering, and more particularly to a power and temperature collection device of a broadcast transmitter. BACKGROUND

[0002] With the rapid development of the broadcast television industry, high-power broadcast transmitters (such as ground digital television transmitters 1kW / 2kW / 3kW / 5kW, frequency modulation broadcast transmitters 3kW / 5kW / 10kW, and CDR transmitters 3kW / 5kW / 10kW, etc.) are widely used in large and medium-sized transmitting stations across the country and continue to face new demand and overseas market expansion. Such equipment usually needs to be operated continuously for 24 hours to ensure the stability of the broadcast, and its operation and maintenance mode gradually transforms from regular maintenance by artificial to intelligent monitoring. However, in the process of large-scale application, the existing transmitter monitoring system exposes significant defects, leading to frequent equipment failures and seriously affecting the safety of the broadcast and user benefits.

[0003] The existing broadcast transmitters generally adopt a highly integrated monitoring and protection scheme, which integrates power collection, temperature monitoring, frequency setting, and alarm display functions in a master control hardware module. This design exposes the following key problems in actual operation:

[0004] Insufficient power collection accuracy: the master control module needs to process multiple types of data simultaneously, and the limited resource allocation results in limited power sampling frequency and resolution, which cannot accurately reflect the real-time output state of the equipment, easily leading to misjudgment or failure of overload protection;

[0005] Protection response lag: the coupling of functions leads to a conflict in data processing priority, and in emergency situations such as over-temperature and over-power, the master control system needs to complete complex calculations before triggering protection actions, which has a significant delay risk and easily leads to equipment damage;

[0006] Poor scalability and compatibility: hardware modules are developed for specific power levels and operating frequencies, with low universality, making it difficult to adapt to the needs of transmitters with multiple frequency bands and power levels, and the cost of equipment upgrade or maintenance is high.

[0007] The above problems directly manifest as: the equipment frequently triggers the protection mechanism due to output power overload, standing wave ratio exceeding the limit, or abnormal temperature at key points during operation, but the protection action is either too sensitive (frequent false triggering) or significantly lagging (having caused equipment damage), and the master control unit cannot accurately locate the fault source. For example, the insufficient accuracy of reflected power monitoring makes it difficult to set the standing wave protection threshold, and the temperature monitoring blind area or error increases the risk of overheating of the power amplifier module, ultimately leading to a broadcast stop accident or permanent damage to the device, reducing system reliability and increasing operation and maintenance pressure. INVENTION CONTENTS

[0008] The utility model discloses a power and temperature acquisition device of broadcast transmitter, aiming at solving the problem of insufficient power acquisition accuracy, lagging protection response, poor expansibility and compatibility in the existing broadcast transmitter monitoring system, leading to frequent equipment failure, reduced system reliability and increased operation and maintenance pressure.

[0009] The utility model discloses a power and temperature acquisition device of broadcast transmitter, aiming at solving the problem of insufficient power acquisition accuracy, lagging protection response, poor expansibility and compatibility in the existing broadcast transmitter monitoring system, leading to frequent equipment failure, reduced system reliability and increased operation and maintenance pressure.

[0010] A power and temperature acquisition device of broadcast transmitter, comprising: a shell, a mainboard, a core board, a detector box and a sensing assembly, the mainboard, the core board and the detector box are all arranged in the shell, the core board, the detector box and the sensing assembly are all connected with the mainboard.

[0011] Among them, the detector box is used for acquiring the power information of the transmitter, and the sensing assembly is used for acquiring the temperature information of the transmitter.

[0012] Optionally, the sensing assembly has at least 8.

[0013] Optionally, the shell is provided with an incident monitoring signal input port and a reflection monitoring signal input port, and the incident monitoring signal input port and the reflection monitoring signal input port are connected with the detector box.

[0014] Optionally, the shell is provided with a power interface, and the power interface is connected with the mainboard.

[0015] Optionally, the shell is provided with an RJ45 interface, and the RJ45 interface is connected with the mainboard.

[0016] Optionally, the shell is provided with an RS485 communication interface, and the RS485 communication interface is connected with the mainboard.

[0017] Optionally, the shell is provided with an interlocking interface, and the interlocking interface is connected with the transmitter main control board of the transmitter and the mainboard respectively.

[0018] Optionally, the detector box is built-in with a detector box module, and the detector box module is connected with the incident monitoring port of the transmitter output power directional coupler, the reflection monitoring port of the reflection power directional coupler and the mainboard.

[0019] Optionally, the mainboard is provided with a sampling module, a sensor module, a storage module and a signal protection module, the sensing assembly is connected with the sensor module, and the sampling module, the storage module and the signal protection module are all connected with the detector box module and the sensor module respectively.

[0020] Optionally, the main board is further provided with a correction module and a threshold module, and the correction module and the threshold module are connected with the detection box module and the sensor module respectively.

[0021] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0022] Improve power collection accuracy: the power information of the transmitter is obtained by the independent detection box, avoiding the resource allocation tension problem caused by the traditional main control module processing multiple types of data at the same time; the detection box can focus on power sampling, improving the sampling frequency and resolution, so as to accurately reflect the real-time output state of the equipment, effectively reduce the misjudgment, ensure the accuracy and reliability of the overload protection, and improve the stability of the equipment operation.

[0023] Enhance the timeliness of protection response: separate the power and temperature collection functions from the main control module, reduce the data processing priority conflict caused by function coupling; in the case of over-temperature, over-power and other emergencies, the detection box and the sensor component can quickly and independently collect key data and directly transmit them to the main board, without the need for the main control system to complete complex calculations to trigger the protection action, greatly shortening the protection response time and effectively avoiding equipment damage due to protection lag.

[0024] Improve scalability and compatibility: modular design, the detection box and the sensor component can be flexibly configured and replaced for different power levels and working frequencies of the transmitter, breaking the limitations of traditional hardware modules customized for specific equipment development, high universality, easily adapting to multiple frequency bands and multiple power levels of the transmitter requirements, reducing the equipment upgrade or maintenance cost, and improving the application range and flexibility of the device.

[0025] Accurate positioning of fault source: independent power and temperature collection modules can provide more accurate and detailed power and temperature data, and the main board can analyze the equipment operation state more accurately based on these data; when the equipment triggers the protection mechanism, the operation and maintenance personnel can quickly locate the fault source according to the accurate collection data, such as setting the standing wave protection threshold reasonably through accurate reflected power monitoring data, and discovering temperature monitoring blind spots or errors in time through comprehensive temperature monitoring data, thereby effectively reducing the occurrence of off-air accidents and permanent damage to devices, improving system reliability, and reducing operation and maintenance pressure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model discloses a structure schematic view of the power and temperature collection device of the broadcast transmitter of the embodiment of the utility model;

[0027] Figure 2 The utility model discloses an internal module structure schematic view of the power and temperature collection device of the broadcast transmitter of the embodiment of the utility model;

[0028] Figure 3The program framework schematic view of the power and temperature acquisition device of the broadcast transmitter is shown in the embodiment of the utility model.

[0029] Figure 4 The external communication schematic view of the power and temperature acquisition device of the broadcast transmitter is shown in the embodiment of the utility model.

[0030] Figure 5 The data acquisition flow schematic view of the power and temperature acquisition device of the broadcast transmitter is shown in the embodiment of the utility model.

[0031] Figure 6 The protection logic flow schematic view of the power and temperature acquisition device of the broadcast transmitter is shown in the embodiment of the utility model.

[0032] Icon: 1 - shell, 2 - mainboard, 3 - core board, 4 - detection box, 5 - sensing assembly. DETAILED DESCRIPTION

[0033] The specific embodiments are described below in combination with the drawings.

[0034] Refer to Figure 1 A power and temperature acquisition device of a broadcast transmitter, comprising: a shell 1, a mainboard 2, a core board 3, a detection box 4 and a sensing assembly 5, the mainboard 2, the core board 3 and the detection box 4 are all arranged in the shell 1, the core board 3, the detection box 4 and the sensing assembly 5 are all connected with the mainboard 2; wherein the detection box 4 is used for acquiring power information of the transmitter; the sensing assembly 5 is used for acquiring temperature information of the transmitter. The shell 1 can adopt a small metal case, the size is suitable for standard cabinet installation (such as 1U height), built-in modular slot, supporting the quick plug of the detection box, the mainboard and the core board. The mainboard 2 integrates a 16-bit ADC sampling module (such as ADS1115), supports double-channel 0-5V voltage input, and is used for detection box signal acquisition; the mainboard 2 is configured with an I2C interface, and the core board 3 is connected with the mainboard 2 through the I2C interface. The core board 3 is connected with the detection box 4 through a CAN bus, and the detection box 4 is connected with the sensing assembly 5 through a CAN bus. The sensing assembly 5 is connected with the core board 3 through a CAN bus. 2C bus interface (rate 400 kHz) connects the sensing assembly 5. The core board 3 can use an STM32H750VBT6 microcontroller (clock frequency 480 MHz, 1 MB Flash, 512 KB RAM) to run the FreeRTOS real-time operating system; the core board 3 integrates a separate hardware floating point operation unit to support fast iterative operation of the power calculation formula; the core board 3 is configured with an 8 MB SPI flash (such as W25Q64) for storing historical data and firmware upgrades. The detection box 4 is internally provided with an active detection chip (such as ADL5511, frequency range 100 kHz-6 GHz) to support -45 dBm to +20 dBm power detection, the input interface uses an SMA female connector with an impedance of 50 Ω and a standing wave ratio of ≤1.2, and an RC filter circuit (cutoff frequency 10 kHz) is integrated to suppress high-frequency noise. The sensing assembly 5 uses a PT100 temperature sensor (accuracy ±0.1℃) connected through double-layer KF2EDG-3.81 terminals, and a separate signal conditioning circuit (including constant current source drive and linearization compensation) is configured for the temperature channel.

[0035] In some embodiments, the sensing assembly 5 has at least 8. Eight PT100 temperature sensors are deployed at key internal heat generating parts of the transmitter (such as power amplifier modules, power supply modules, heat sinks, filters, etc.), and each sensor is connected to the double-layer KF2EDG-3.81 terminal of the device through an armored cable. Each temperature channel is equipped with a separate constant current source drive circuit (such as AD590) and a linearization compensation circuit (based on a second-order polynomial fit) to suppress environmental temperature drift and improve measurement accuracy to ±0.5℃. The eight temperature sensors can simultaneously monitor multiple core components of the transmitter (such as power amplifier units, power supply modules, synthesizers, etc.), ensuring that there is no blind area in temperature monitoring and avoiding potential faults caused by missed single-point monitoring.

[0036] In some embodiments, with reference to Figure 1The housing 1 is provided with an incident monitoring signal input port and a reflected monitoring signal input port, which are connected with the detector box 4. Two SMA female connectors (model: SMA-K-50-01) are arranged on the rear side plate of the housing 1, which are respectively marked as “RF (incident)” and “RF (reflected)”, and the distance is ≥15 mm to reduce signal crosstalk. The inside of the connector is connected with the input end of the detector box 4 through an RG-316 coaxial cable (characteristic impedance 50Ω, attenuation ≤0.1dB / meter), and the cable length is ≤0.5 meters to maintain signal integrity. Each port is provided with an RC filter circuit (R=100Ω, C=100nF) to further suppress high-frequency noise, and the cutoff frequency is 15.9kHz. The ADL5511 chip built-in the detector box 4 converts the radio frequency signal into 0-5V direct current voltage, which is sampled by the 16-bit ADC (ADS1115) of the mainboard 2, and the sampling rate is ≥1kHz. The double-port design realizes independent collection of incident power (Po) and reflected power (Pr), and the detection accuracy is improved to ±0.1% by the active chip (ADL5511) built-in the detector box, which is significantly improved compared with the traditional integrated scheme (±1%). The standing wave ratio is calculated in real time, which solves the problem that the reflected power cannot truly reflect the standing wave ratio in the traditional scheme.

[0037] In some embodiments, the housing 1 is provided with a power supply interface connected with the mainboard 2. An industrial power supply interface (model: KF2EDG-3.81-2P) is arranged on the housing 1, which adopts a mistaken insertion prevention design (with a positioning pin), supports DC12V input, and the rated current is 5A. The inside of the interface is connected with the power input end of the mainboard 2 through a tinned copper wire with a cross-sectional area ≥1.5mm 2 , and the wire length is ≤10cm to reduce the line voltage drop. The outside of the interface is provided with a waterproof and dustproof rubber ring (IP65 protection level) to adapt to the outdoor cabinet installation requirement.

[0038] In some embodiments, the shell 1 is provided with an RJ45 interface connected with the mainboard 2. An RJ45 interface (model: HR911105A) is configured on the shell 1, integrated with a 1.25GHz network transformer, supporting 10 / 100Mbps self-adaptation, and compatible with IEEE802.3 standard. The interface spacing is greater than or equal to 20mm from the RS485 interface, reducing signal crosstalk, and internally connected to the PHY chip (such as LAN8720) of the mainboard 2 through differential signal lines (Cat5e twisted pair). A metal shield is arranged outside the interface, grounded through the case shell, forming a complete shielding layer to suppress EMI interference. The mainboard 2 is integrated with a LAN8720A PHY chip, supporting an RMII interface connected with the STM32H750VBT6 of the core board 3, reducing CPU load. The differential signal line adopts 100Ω impedance matching, and the twist rate of each pair of signal lines is greater than or equal to 30 twists per meter, reducing common mode noise. TVS tube (SMBJ33CA) and gas discharge tube (GDT-12B-420C) protection circuits are added to protect against surge voltage (±6kV) and ESD (±15kV). At the same time, ModbusTCP and custom protocols are supported, adapting to mainstream monitoring systems (such as SCADA), reducing integration cost.

[0039] In some embodiments, the shell 1 is provided with an RS485 communication interface connected with the mainboard 2. A KF2EDG-3.81 terminal (3P) with a 3.81mm spacing is configured, supporting A / B differential signal and GND connection, with a rated current of 5A, and adapting to shielded twisted pair lines (such as RVSP2×0.75mm 2 ). The interface is spaced greater than or equal to 20mm from the RJ45, reducing signal crosstalk, and internally connected to the RS485 transceiver (such as MAX485) of the mainboard 2 through differential signal lines. An anti-misplug buckle is arranged outside the terminal to ensure the correct sequence of A / B lines and avoid reverse connection causing chip damage. Differential transmission and optocoupler isolation make RS485 remain stable in complex electromagnetic environments, with a bit error rate less than or equal to 10 -6 , suitable for scenarios where the transmitter and main control room are far apart (such as greater than or equal to 500 meters). It is widely compatible with mainstream industrial controllers (such as PLC, SCADA), and can access existing monitoring networks without additional gateway, reducing integration cost.

[0040] In some embodiments, the shell 1 is provided with an interlocking interface connected with the transmitter main control board of the transmitter and the mainboard 2 respectively. An industrial-grade interlocking interface (model: KF2EDG-3.81-2P) is configured, adopting double-pole double-throw relay output, normally closed (conducting) in normal state and open in protection state. The interface is connected with the mainboard 2 through a cross-sectional area greater than or equal to 1.5mm 2The shielded wire is connected with the relay control circuit of the mainboard 2, the length of the wire is less than or equal to 10 cm, and the signal delay is reduced. The mainboard 2 integrates a solid-state relay (SSR) driving circuit (such as AQW214), which controls the on-off of the interlocking signal and has a response time less than or equal to 1 ms. An optical coupling isolation (such as PC817) is used to realize the electrical isolation of the interlocking signal and the mainboard, the isolation voltage is greater than or equal to 2.5 kV, and the circuit is prevented from being damaged by high-voltage backflow. A TVS tube (SMBJ15CA) and a voltage-dependent resistor (MYG14K471) are added to the protection circuit to protect against surge voltage (±6 kV) and transient overvoltage. The core board 3 monitors the temperature, power and standing wave data in real time, and when any parameter exceeds the limit, the relay is immediately disconnected through the GPIO to trigger the interlocking (the response time is less than or equal to 5 ms); after the interlocking is disconnected, the device sends a protection event code (such as 0x01 for temperature protection and 0x02 for power protection) to the main control unit through RS485 / RJ45; after the fault is eliminated, a reset instruction (0x03) or power-off restart needs to be sent through the communication interface to restore the interlocking closure. The interlocking control is independent of the transmitter main control unit, the protection response time is less than or equal to 5 ms (the traditional scheme needs more than 300 ms), and the damage of the equipment caused by the delay of the main control system is avoided.

[0041] In some embodiments, the detector box 4 is built-in with a detector box module, which is connected with the incident monitoring port of the transmitter output power directional coupler and the reflection monitoring port of the reflection power directional coupler, and the mainboard 2. The detector box module includes:

[0042] The active detection circuit: an integrated ADL5511 detection chip (frequency range 100 kHz-6 GHz) is used to convert the incident / reflective radio frequency signal into a 0-5V direct current voltage, which is sampled by the 16-bit ADC (ADS1115) of the mainboard 2, and the sampling rate is greater than or equal to 1 kHz;

[0043] The signal conditioning module: an RC filter circuit (cutoff frequency 10 kHz) and a 50Ω impedance matching network are built-in to suppress high-frequency noise and ensure signal integrity;

[0044] The communication interface: communicates with the transmitter main control board through the RS485 bus (MODBUS protocol) and supports dynamic parameter configuration (such as correction coefficient, threshold value); at the same time, the mainboard 2 interacts with the core board 3 in real time through the SPI bus.

[0045] The main control board instructions (such as setting the working frequency and power threshold) are received through the RS485 interface, and the real-time power data and protection status are returned. The detector box module is separated from the mainboard, which reduces the resource occupation of the main control board and avoids signal interference caused by function coupling. The modular structure supports quick plug-in maintenance and reduces maintenance cost.

[0046] In some embodiments, refer to Figure 2The main board 2 is provided with a sampling module, a sensor module, a storage module and a signal protection module. The sensing assembly 5 is connected with the sensor module. The sampling module, the storage module and the signal protection module are respectively connected with the detection box module and the sensor module.

[0047] The sampling module integrates a 16-bit ADC chip (such as ADS1115), supports double-channel differential input, has a sampling rate of 860 SPS, and a resolution of 0.122 mV (5V full scale); an input channel is configured with an RC filter circuit (R=10kΩ, C=100nF), with a cutoff frequency of 159Hz, which suppresses high-frequency noise; a programmable gain amplifier (PGA) is supported, with a gain of 1 / 2 / 4 / 8 / 16, which is suitable for the 0-5V signal output by the detection box. The sampling module communicates with the core board 3 through an SPI bus (rate 4MHz), and transmits the data converted by the ADC in real time, supports burst mode sampling, and updates power data every 100ms.

[0048] The sensor module uses an I 2 C multiplexer (such as PCA9548) to expand 8 temperature acquisition channels, each of which independently supports a PT100 sensor; each channel is integrated with a constant current source driving circuit (AD590, 20μA constant current) and a linearization compensation circuit (based on table lookup method to correct nonlinear error); a TVS tube (SMBJ33CA) is configured to protect the I 2 C bus, preventing electrostatic discharge (ESD) and surge voltage. The sensor module communicates with the ZAM6228 temperature module through an I 2 C bus (400kHz), and acquires temperature data every 100ms; after linearization compensation, the temperature value is converted into an actual temperature value (unit: ℃), with an accuracy of ±0.5℃.

[0049] The storage module integrates a 256KB EEPROM (such as AT24C256) for storing correction parameters (a / b / c / d coefficients), threshold values (temperature / power / standing wave) and device configurations (such as address, frequency); an 8MB SPI Flash (W25Q64) is configured for storing historical data (such as the last 1000 power / temperature records) and firmware upgrade images. The core board 3 reads and writes the EEPROM through the SPI bus, and automatically backs up to the Flash after each parameter change, supports power failure protection, and the data saving time is ≥10 years.

[0050] The signal protection module covers all interfaces such as power supply, RF, I 2 C, RS485, RJ45, interlocking, etc., meets the IEC61000-4-2 (ESD ±15kV) and IEC61000-4-5 (surge ±6kV) standards, the protection circuit insertion loss is ≤0.1dB (100kHz-10MHz), which ensures the power detection accuracy of ±0.1%, and the optocoupler isolation makes the I 2The C bus communication error rate is less than or equal to 10 -6 .

[0051] In some embodiments, the mainboard 2 is further provided with a correction module and a threshold module, and the correction module and the threshold module are connected with the detector box module and the sensor module respectively.

[0052] The correction module acquires the 0-5V voltage signal output by the detector box through the 16-bit ADC sampling module (ADS1115) of the mainboard 2; the STM32H750VBT6 microcontroller of the core board 3 is used to utilize the built-in hardware floating point operation unit (FPU); the correction coefficient is stored in the 256KB EEPROM (AT24C256) of the mainboard 2, and dynamic updating is supported. An independent task (such as a "power correction task") is created in the FreeRTOS operating system, and is executed periodically at 100ms; after reading the ADC sampling value, the corresponding coefficient is obtained according to the current working frequency (stored in the EEPROM), and the power calculation is completed; linear interpolation compensation is supported, and the correction requirement of a wide frequency band (100kHz-6GHz) is covered.

[0053] The threshold module directly controls the interlocking relay (AQW214) through the GPIO pin (such as PA5) of the mainboard 2, and the response time is less than or equal to 1ms; the threshold value (temperature / power / standing wave) is stored in the EEPROM, and remote configuration is supported through RS485 / RJ45. A "protection logic task" is created in FreeRTOS, and real-time data (temperature, Po, Pr) are polled periodically at 5ms. A three-stage comparison algorithm is adopted:

[0054] Temperature comparison: 8-way temperature is compared with the preset threshold (temp_thre[8]) at the same time;

[0055] Power comparison: the incident power Po is compared with the output power threshold, and the reflected power Pr is compared with the reflected power threshold;

[0056] Standing wave ratio calculation: the standing wave ratio is calculated based on the incident power Po and the reflected power Pr in real time, and is compared with the standing wave threshold.

[0057] Any parameter exceeding the limit will immediately trigger interlocking protection, and at the same time, a fault code (such as 0x01 temperature protection) is sent through the communication interface.

[0058] In some embodiments, referring to Figure 3 , the detector box program framework includes: driving data initialization, watchdog task, monitoring task, power acquisition task, temperature acquisition task, 485 communication task and network port communication task.

[0059] In some embodiments, referring to Figure 4, external communication part: communication with RS-485, communicate with main control board with specific protocol. The main controller can set the temperature over-temperature threshold, output power threshold and standing wave threshold, working frequency and sampling coefficient, etc. The main controller can also obtain the data of each parameter and protection information at this time.

[0060] S101, RS485 configures related baud rate and other parameters, and initializes;

[0061] S102, continuously waits for data, and judges the data content according to the content of the protocol frame when receiving the data;

[0062] S103, when judging as a setting type frame, sets the corresponding threshold data or correction parameter data through the serial port, and stores the data into the detector box database, and needs to be powered off to save the data into eeprom. After completion, return to continue waiting; when judging as a reading type frame, reply the corresponding reading information through the serial port. After completion, return to continue waiting.

[0063] In some embodiments, referring to Figure 5 , the data acquisition flow chart includes ADC sampling, temperature reading, parameter calculation and data updating;

[0064] S201, eeprom data initialization, read the corresponding correction parameters and other data;

[0065] S202, power acquisition uses adc sampling, initializes the sampling pin; temperature acquisition is collected through the device ZAM6228, and the communication mode is IIC, and the communication pin is initialized;

[0066] S203, for power acquisition, read the voltage value collected by adc at this time; for temperature acquisition, read the communication data returned by ZAM6228.

[0067] S204, for power acquisition, calculate the output power and reflected power at this time according to the correction parameters corresponding to the working frequency at this time.

[0068] In some embodiments, referring to Figure 6 , the protection logic flow is a loop judgment process of threshold comparison and protection signal output. Including steps:

[0069] S301: read the over-temperature threshold of the detector box at this time, the output power threshold and the reflected power threshold; read the temperature value, the output power value and the reflected power value at this time;

[0070] S302: compare whether the temperature exceeds the temperature threshold, if yes, output the protection signal and return to the first step; otherwise, go to the next step;

[0071] S303: compare whether the output power exceeds the output power threshold, if yes, output the protection signal, return to the first step; otherwise, go to the next step;

[0072] S304: compare whether the reflected power exceeds the reflected power threshold, if yes, output the protection signal, return to the first step; otherwise, return to the first step.

Claims

1. A power and temperature collection apparatus for a broadcast transmitter, characterized by, It includes: The shell (1), the main plate (2), the core plate (3), the detection box (4) and the sensing assembly (5), the main plate (2), the core plate (3) and the detection box (4) are arranged in the shell (1), the core plate (3), the detection box (4) and the sensing assembly (5) are connected with the main plate (2); Wherein, the detection box (4) is used for obtaining the power information of the transmitter; the sensing assembly (5) is used for obtaining the temperature information of the transmitter.

2. The power and temperature collection apparatus of a broadcast transmitter of claim 1, wherein, The sensing assembly (5) has at least 8.

3. The power and temperature collection apparatus of a broadcast transmitter of claim 1, wherein, The shell (1) is provided with an incident monitoring signal input port and a reflected monitoring signal input port, and the incident monitoring signal input port and the reflected monitoring signal input port are connected with the detection box (4).

4. The power and temperature collection apparatus of a broadcast transmitter according to claim 1, wherein The shell (1) is provided with a power interface, and the power interface is connected with the main plate (2).

5. The power and temperature collection apparatus of a broadcast transmitter of claim 1, wherein, The shell (1) is provided with an RJ45 interface, and the RJ45 interface is connected with the main plate (2).

6. The power and temperature collection apparatus of a broadcast transmitter of claim 1, wherein, The shell (1) is provided with an RS485 communication interface, and the RS485 communication interface is connected with the main plate (2).

7. The power and temperature collection apparatus of a broadcast transmitter of claim 1, wherein, The shell (1) is provided with an interlocking interface, and the interlocking interface is connected with the transmitter main control board of the transmitter and the main plate (2) respectively.

8. The power and temperature collection apparatus of a broadcast transmitter according to Claim 1, wherein The detection box (4) is provided with a detection box module, and the detection box module is connected with the incident monitoring port of the transmitter output power directional coupler and the reflected monitoring port of the reflected power directional coupler and the main plate (2).

9. The power and temperature collection apparatus of a broadcast transmitter of claim 8, wherein, The main plate (2) is provided with a sampling module, a sensor module, a storage module and a signal protection module, the sensing assembly (5) is connected with the sensor module, and the sampling module, the storage module and the signal protection module are connected with the detection box module and the sensor module respectively.

10. The power and temperature collection apparatus of a broadcast transmitter of claim 9, wherein, The main plate (2) is further provided with a correction module and a threshold module, and the correction module and the threshold module are connected with the detection box module and the sensor module respectively.

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