Multifunctional mining acousto-optic voice alarm device

Abstract

The invention discloses a multifunctional mining acousto-optic voice alarm device, which is characterized in that a 3.3 V power supply supplies power to an alarm device MCU module, a voice IC module and an RS485 communication module, a 5V power supply supplies power to a loudspeaker, an alarm audio signal is input into the voice IC module from an external write-in interface, a light alarm module is connected with the alarm device MCU module, and the RS485 communication module supplies power to the RS485 communication module. The alarm device MCU module drives the light alarm module to work, the air door state monitoring and output module is connected with the alarm device MCU module, transmits an air door state signal to the alarm device MCU and outputs an air door state as a current signal, and the alarm device MCU module is connected with the RS485 communication module and communicates with a coal mine monitoring substation through the RS485 communication module. The voice IC module is connected with the alarm device MCU module, the loudspeaker is connected with the voice IC module, the alarm device MCU module controls the voice IC module, and the voice IC module drives the loudspeaker to work. The overall power consumption of the alarm is reduced, and the air door state monitoring and alarming functions are achieved.

Description

Technical Field

[0001] The invention relates to a multifunctional sound, light and voice alarm device for mines, belonging to the technical field of coal mine safety monitoring equipment. Background Art

[0002] Safety monitoring is crucial in underground coal mine operating environments. Although the existing mine sound and light alarms used in conjunction with underground air door sensors can realize alarms for any air door opening or air path short circuits, they have significant defects. The alarm uses a linear voltage stabilization method, which results in excessive power consumption of the entire machine. The power consumption is close to 90 mA during normal operation and reaches 120 mA during alarm. Such high power consumption means that one intrinsically safe power supply can only be connected to one mine sound and light alarm, which greatly limits the number of sensor installations and connections, and cannot meet the application requirements of complex underground scenarios. In addition, the original mine sound and light alarm does not have RS485 communication function, which makes it impossible to connect to the mine monitoring substation for application, making it difficult to achieve centralized monitoring and unified management of data, which is not conducive to building an efficient underground safety monitoring system. Summary of the Invention

[0003] The purpose of the present invention is to provide a multifunctional mine-use sound, light and voice alarm device, which reduces the overall power consumption of the alarm and realizes the following functions:

[0004] 1. Damper status monitoring and alarm function: The detected damper status is converted to RS485 communication and transmitted to the mine monitoring substation, thus realizing data monitoring of the damper status. When the damper status is detected as "open", the alarm will sound an alarm through the voice IC driving the speaker, and the main MCU will control the light alarm to promptly alert staff to the abnormal damper status.

[0005] 2. Alarm linkage with the mine monitoring substation: By connecting the alarm's 485 communication output to the mine monitoring substation's RS485 communication control port, the substation's sound and light alarm functions can be activated based on commands received from the substation. This allows the alarm to work closely with the substation, responding promptly and issuing alarm signals in the event of other safety hazards (such as a power failure in the damper sensor) or emergencies.

[0006] 3. Current signal output function: The detected damper status can be converted into 1mA or 5mA current signal output. The current signal output facilitates signal interaction and integration with other devices, further expanding the application range of the alarm.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A multifunctional mine-used sound, light and voice alarm device comprises an alarm device MCU module, a 5V power supply, a 3.3V power supply, a speaker, a light alarm module, a voice IC module, a damper status monitoring and output module, and an RS485 communication module; the 3.3V power supply supplies power to the alarm device MCU module, the voice IC module, and the RS485 communication module, the 5V power supply supplies power to the speaker, an alarm audio signal is externally written into an interface and input into the voice IC module, the light alarm module is connected to the alarm device MCU module, the alarm device MCU module drives the light alarm module to operate, the damper status monitoring and output module is connected to the alarm device MCU module, transmits the damper status signal to the alarm device MCU, and outputs the damper status as a current signal, the alarm device MCU module is connected to the RS485 communication module, communicates with a coal mine monitoring substation via the RS485 communication module, the voice IC module is connected to the alarm device MCU module, the speaker is connected to the voice IC module, the alarm device MCU module controls the voice IC module, and the voice IC module drives the speaker to operate.

[0009] The purpose of the present invention can be further achieved by the following technical measures:

[0010] The aforementioned multifunctional mining sound, light and voice alarm device uses a 78L03 switching power supply for 3.3V power supply and a 78L05 switching power supply for 5V power supply.

[0011] The aforementioned multifunctional mining sound and light voice alarm device, the voice IC module, includes a CH7800 audio decoder and a CS8305E power amplifier chip. The audio decoder is connected to the power amplifier chip, and the sound file is written to the audio decoder through the computer USB. The serial port of the audio decoder communicates data with the alarm device MCU. The audio decoder controls the power amplifier chip through the DAC pin to drive the speaker for voice broadcasting; the SD pin of the power amplifier chip is controlled by the alarm device MCU, and the power switch is controlled by the MCU. The power amplifier chip is turned on when there is an alarm and turned off when there is no alarm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By utilizing a switching power supply with high-frequency switching for efficient energy conversion, the alarm's overall power consumption is significantly reduced. Furthermore, the voice amplifier is activated when an alarm is active and deactivated when no alarm is active, effectively reducing the alarm's power consumption when it is not. This significantly reduces power consumption compared to existing alarms, significantly improving power efficiency and meeting the needs of a wider range of devices.

[0014] Realize the transmission of damper status data and alarm function based on damper status; realize data communication function with mine monitoring substation, and ensure stable and efficient data transmission between alarm and monitoring substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a functional block diagram of the multifunctional mining sound, light and voice alarm of the present invention;

[0016] Figure 2 This is the circuit schematic diagram of the MCU module of the alarm device;

[0017] Figure 3 This is the circuit schematic diagram of the light alarm module;

[0018] Figure 4 This is the circuit schematic diagram of the damper status monitoring and output module;

[0019] Figure 5 This is the circuit schematic diagram of the voice IC module;

[0020] Figure 6 This is the circuit schematic diagram of the RS485 communication module;

[0021] Figure 7 The present invention is a schematic diagram of the connection between the multifunctional mine sound, light and voice alarm and other equipment. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, a multifunctional mine-used sound, light and voice alarm device includes an alarm device MCU module, a 5V power supply, a 3.3V power supply, a speaker, a light alarm module, a voice IC module, a damper status monitoring and output module, and an RS485 communication module; the 3.3V power supply supplies power to the alarm device MCU module, the voice IC module, and the RS485 communication module, and the 5V power supply supplies power to the speaker. The alarm audio signal is written from the external interface into the voice IC module, the light alarm module is connected to the alarm device MCU module, the alarm device MCU module drives the light alarm module to work, the damper status monitoring and output module is connected to the alarm device MCU module, transmits the damper status to the alarm device MCU, and outputs the damper status as a current signal, the alarm device MCU module is connected to the RS485 communication module, and communicates with the coal mine monitoring substation through the RS485 communication module, the voice IC module is connected to the alarm device MCU module, the speaker is connected to the voice IC module, the alarm device MCU module controls the voice IC module, and the voice IC module drives the speaker to work.

[0024] In terms of power supply design, the audible and visual alarm is connected to the intrinsically safe power supply of the mine monitoring substation. The power inputs are designed with two switching power supplies: the 78L03 and 78L05. One DC 3.3V line powers the MCU, 485 communication output, and voice IC, while the other DC 5V line powers the speaker. By utilizing a high-frequency switching power supply for efficient energy conversion, the overall power consumption of the alarm is significantly reduced. After optimization, the power consumption is approximately 30 mA during normal operation, and approximately 60 mA during audible and visual alarm operation. This represents a significant reduction in power consumption compared to the original alarm, significantly improving power efficiency and meeting the needs of a wider range of devices.

[0025] Alarm device MCU module such as Figure 2 As shown in the figure, the MCU uses STM32L15ICBT6A as the core processor, and the dip switches SW1 and SW2 are used for parameter setting. Figure 3 As shown in the figure, the alarm light driver is controlled by the PA7-AC pin of the MCU to achieve precise driving of the light alarm function.

[0026] The damper status monitoring and output module circuit is as follows Figure 4 As shown, it is responsible for detecting the status of the dampers and outputting the corresponding current signal. A set of damper sensors detects the status of the two dampers. The sensor detection part is installed on the door frame and the magnet is installed on the door. The sensor is designed with two sets of detection devices. The two ends of the internal reed switch of each set are connected to the circuit F1 and GND and F2 and GND respectively. When the damper magnet approaches the sensor detection component, the reed switch is turned on. If both sets of dampers are in the closed state, F1JC and F2JC are both low level. The two points are connected to the PA5-JC or PA6-JC pins of the MCU microcontroller respectively, the IC4 optocoupler is turned on, and the BG1 transistor S9015 is turned on. Since the D10 red light-emitting diode is stabilized at 1.8V, BG1 is turned on to generate a 0.7V tube voltage drop, and 1.1V voltage remains across the R27 resistor. At this time, IOUT=1.1V / 200Ω=5.5mA, IOUT outputs this current signal, and the alarm does not emit an audible or visual alarm; when any damper magnet is away from the sensor detection component , the reed switch is disconnected, the corresponding air door is in the open state, F1JC or F2JC becomes high level, and the MCU drives the light alarm circuit and the sound alarm circuit according to the detected level state, and broadcasts "One air door has been opened, please wait for the air door in front"; when both sets of air door magnets are away from the sensor detection component, F1JC and F2JC are both high level, the alarm emits sound and light alarm, and the sound alarm broadcasts "Danger! Danger! Please close the air door", at this time IC4 optocoupler is cut off, BG1 transistor S9015 is cut off, R27 is connected in series with R28 output, IOUT=18V / 15200Ω=1.1mA, IOUT outputs this current signal.

[0027] The voice IC module includes audio decoding and power amplifier driving circuits, such as Figure 5 As shown. The voice IC uses CH7800 as the core audio decoding component and is provided with an external write interface J3, which allows sound files to be directly written to the device via a computer USB. The present invention writes three different sound signals ("One damper is open, please wait for the damper ahead", "Danger! Danger! Please close the damper", and "Alarm sound"). Its serial port is connected to the MCU microcontroller TX3 and RX3 to achieve data communication. The voice IC controls the CS8305E power amplifier through the DAC to drive the speaker to broadcast. The SD pin of the power amplifier chip CS8305E is controlled by the MCU microcontroller PB8 pin through the Ponoff control power switch. When the Ponoff level is high, Q7 is turned on and the power amplifier U4 is turned off. When the Ponoff level is low, Q7 is turned off and the power amplifier U4 is turned on. Under the control of the MCU, the power amplifier U4 is turned on when an alarm is issued and turned off when there is no alarm, effectively reducing the power consumption of the alarm when it is not sounding.

[0028] The RS485 communication module circuit schematic is as follows Figure 6 As shown, it is used to realize the data communication function with the mine monitoring substation, ensuring stable and efficient data transmission between the alarm and the monitoring substation.

[0029] When the alarm is connected to a mine monitoring substation, there are two different connection and working modes:

[0030] like Figure 7 As shown in (a), when the alarm is connected to the control port of the mine monitoring substation, the mine sound and light alarm receives the mine monitoring substation call command but does not respond to this command. By parsing the command, it determines whether the alarm should sound or light an alarm. If an alarm is executed, the speaker broadcasts "alarm sound".

[0031] like Figure 7 As shown in (b), when the damper sensor responds to the call command of the mine monitoring substation by converting the digital signal through the sound and light alarm, the sound and light alarm confirms the content of the sound and light alarm according to the status of the damper, and realizes accurate alarm based on the status of the damper.

[0032] The following issues need to be noted during implementation:

[0033] Connecting to the control port of a mine monitoring substation: When connecting a mine-use sound and light alarm to the control port of a mine monitoring substation, be sure to pay attention to the positive and negative polarity of the sound and light alarm's power supply and ensure correct connection to avoid damage to the equipment due to reverse power connection. Also, when connecting to the 485 port, pay close attention to the definition of terminals A and B to ensure the correct connection of the 485 communication line. Once connected, the sound and light alarm receives commands from the monitoring substation control port but does not respond to signals from the substation. It only performs the corresponding sound and light alarm operations based on the commands.

[0034] Connecting to the sensor acquisition port of a mine monitoring substation: When connecting a mine-use sound and light alarm to the sensor acquisition port of a mine monitoring substation, pay attention to the positive and negative poles of the sound and light alarm's power supply and the definition of terminals A and B of the 485 port. After connection, the sound and light alarm receives the sensor acquisition commands from the monitoring substation and responds to the substation with signals, realizing the transmission of damper status data and the alarm function based on the damper status.

[0035] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A multifunctional mine sound, light and voice alarm device, characterized in that: It includes an alarm device MCU module, a 5V power supply, a 3.3V power supply, a speaker, a light alarm module, a voice IC module, a damper status monitoring and output module, and an RS485 communication module; the 3.3V power supply supplies power to the alarm device MCU module, the voice IC module, and the RS485 communication module, the 5V power supply supplies power to the speaker, the alarm audio signal is written from the external interface and input into the voice IC module, the light alarm module is connected to the alarm device MCU module, the alarm device MCU module drives the light alarm module to work, the damper status monitoring and output module is connected to the alarm device MCU module, transmits the damper status signal to the alarm device MCU, and outputs the damper status as a current signal, the alarm device MCU module is connected to the RS485 communication module, communicates with the coal mine monitoring substation through the RS485 communication module, the voice IC module is connected to the alarm device MCU module, the speaker is connected to the voice IC module, the alarm device MCU module controls the voice IC module, and the voice IC module drives the speaker to work.

2. A multifunctional mining sound, light and voice alarm device as claimed in claim 1, characterized in that: The 3.3V power supply adopts 78L03 switching power supply, and the 5V power supply adopts 78L05 switching power supply.

3. A multifunctional mine sound, light and voice alarm device as claimed in claim 1, characterized in that: The voice IC module includes a CH7800 audio decoder and a CS8305E power amplifier chip. The audio decoder is connected to the power amplifier chip. The sound file is written to the audio decoder through a computer USB. The serial port of the audio decoder communicates data with the alarm device MCU. The audio decoder controls the power amplifier chip through the DAC pin to drive the speaker for voice broadcasting; the SD pin of the power amplifier chip is controlled by the alarm device MCU, and the power switch is controlled by the MCU. The power amplifier chip is turned on when an alarm is issued and turned off when there is no alarm.

Images