Mining intrinsic safety type digital display audible and visual alarm circuit

Abstract

The utility model belongs to the technical field of mining alarms, and particularly relates to a mining intrinsic safety type digital display audible and visual alarm circuit, which comprises a power supply circuit, a singlechip control circuit, a voice circuit, a traffic light display circuit, a digital display circuit and a 485 communication circuit, wherein the power supply circuit comprises a power supply chip; the single-chip microcomputer control circuit comprises a single-chip microcomputer. The voice circuit comprises a voice selection circuit and a voice power amplification circuit; the digital display circuit comprises a control chip, a bit signal amplification circuit, a segment signal amplification circuit and a plurality of groups of LED lamp strings; the 485 communication circuit comprises a communication chip; according to the utility model, on the basis that intrinsic safety type processing is carried out on each circuit in the digital display audible and visual alarm, the bit signal amplification circuit and the segment signal amplification circuit are designed in the digital display circuit, and control signals sent by the single-chip microcomputer are amplified according to needs so as to control the LED lamp string, so that the problem that welding errors are easily caused by too many components is avoided; and the production cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine alarms, in particular to a mine intrinsically safe digital display sound and light alarm circuit. Background Art

[0002] The geological conditions of my country's coal mines are complex. Underground ventilation and air volume regulation are the primary prerequisites for safe production in mines. A complete ventilation system is an important prerequisite for safe production in mine tunnels. The dampers in the underground tunnels of coal mines are important devices that play a role in ventilation and air volume isolation and diversion in the tunnels, and at the same time provide convenience for underground pedestrians and mine car transportation. However, the current requirements for mining equipment require that the damper opening, opening time and other conditions be combined to jointly control the damper opening and opening time with the safe production in the coal mine, and the damper status be controlled on demand while ensuring safety. In addition, for safety reasons, to prevent danger to pedestrians when passing through the damper and to prevent accidents of collision between mine cars and dampers, the closing time after the damper is opened and the status of the damper need to be detected by special sensors, and an alarm is also needed to provide a warning reference for the staff.

[0003] The existing sound and light alarm is not intrinsically safe, and only has the display of red and green lights and the voice broadcast function to remind the staff that the damper is in working status at this time. However, the use of only these two warning methods will have obvious disadvantages. If the staff sees that the damper is open and is about to pass through, if the damper is about to close at this time, it will cause harm to the staff, which is not conducive to ensuring safe production. In this way, it is particularly important for the sound and light alarm to be able to display the countdown digitally. There are alarms with digital display functions in the prior art, but the digital display circuit in this alarm circuit uses multiple optocouplers or transistors to realize the lighting of the digital display light group. Such a setting leads to an increase in the use of circuit components, which increases costs and also causes the inconvenience of circuit welding, is prone to errors, and increases labor intensity. Utility Model Content

[0004] In view of this, the utility model provides a mine-use intrinsically safe digital display sound and light alarm circuit, which aims to provide a mine-use intrinsically safe sound and light alarm with a countdown digital display function on the basis of having red and green light signal warning and voice broadcast warning functions. At the same time, it takes into account the selection and use of components in the digital display circuit, thereby reducing production costs and solving the problems of high labor intensity and easy errors in circuit welding.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] Mine intrinsically safe digital display sound and light alarm circuit, including:

[0007] A power supply circuit, including an RY8326 power supply chip, is connected to an external 12V input voltage and outputs a 5V voltage through the RY8326 power supply chip to power the entire alarm circuit;

[0008] The single-chip microcomputer control circuit includes an STC8G1K08 single-chip microcomputer, wherein the input end of the STC8G1K08 single-chip microcomputer is connected to the output end of the power supply circuit; the output end of the STC8G1K08 single-chip microcomputer is respectively connected to the voice circuit and the traffic light display circuit through two intermediate optical couplers; the output end of the STC8G1K08 single-chip microcomputer is also connected to the digital display circuit, wherein:

[0009] The intermediate optocoupler isolator includes an intermediate diode and an intermediate transistor. The intermediate diode converts the input 5V electrical signal into an optical signal. The intermediate transistor receives the optical signal and converts it into an 11V electrical signal, which is then input into the voice circuit and the traffic light display circuit.

[0010] The voice circuit includes a voice selection circuit and a voice power amplifier circuit. The voice selection circuit includes four voice signal control terminals, namely P00, P01, P02, and P03. In addition, the voice selection circuit is adapted to be equipped with the intermediate optocoupler isolator. After receiving the control signal from the STC8G1K08 single-chip microcomputer through the intermediate optocoupler isolator, the voice selection circuit outputs an analog signal from the four voice signal control terminals; the voice power amplifier circuit includes a WT9110B mono audio amplifier. The WT9110B mono audio amplifier amplifies the analog signal output by the voice selection circuit and outputs it to the speaker, which then plays the voice.

[0011] The traffic light display circuit includes a red light portion and a green light portion, wherein the red light portion is provided with a red light LED, and the red light LED is adapted to be equipped with the intermediate optocoupler isolator; in addition, the green light portion is provided with a green light LED, and the green light LED is also adapted to be equipped with the intermediate optocoupler isolator;

[0012] The digital display circuit includes an AIP1639 control chip, a bit signal amplification circuit, a segment signal amplification circuit, and several groups of LED light strings. After receiving a control signal from an STC8G1K08 single-chip microcomputer, the AIP1639 control chip transmits the digital tube bit signal in the control signal to the bit signal amplification circuit for amplification. At the same time, the AIP1639 control chip also transmits the digital tube segment signal in the control signal to the segment signal amplification circuit for amplification. The amplified digital tube bit signal and digital tube segment signal are simultaneously output to the several groups of LED light strings, and the several groups of LED light strings are lit.

[0013] A 485 communication circuit is connected in series in the entire alarm circuit. The 485 communication circuit is used for signal communication transmission in the entire alarm circuit. The 485 communication circuit includes a MAX485 communication chip. The MAX485 communication chip converts the external signal received by the input end of the alarm circuit into a serial port signal recognized by the STC8G1K08 microcontroller. Then the STC8G1K08 microcontroller sends control instructions to the remaining circuits through the 485 communication circuit.

[0014] Preferably, the power supply circuit also includes two SS34 diodes. After the external 12V input voltage passes through the two SS34 diodes, the RY8326 power supply chip outputs a 5V voltage. On this basis, the power supply circuit also includes an overvoltage protection circuit. The overvoltage protection circuit includes an MCR106-8G thyristor and a ZMM5V1 voltage regulator. The voltage in the power supply circuit is monitored and protected by the cooperation of the MCR106-8G thyristor and the ZMM5V1 voltage regulator. In addition, a group of D11 power indicator lights are also connected in series at the output end of the power supply circuit, and whether the power supply circuit is powered is determined by the lighting and extinguishing states of the D11 power indicator lights.

[0015] More preferably, in the digital display circuit, the bit signal amplification circuit includes two ULN2003 integrated inverter chips, and the two ULN2003 integrated inverter chips invert and amplify the digital tube bit signal in the control signal obtained by the AIP1639 control chip.

[0016] Furthermore, in the digital display circuit, the segment signal amplification circuit includes an EL817 isolation optocoupler and an SS8550 transistor, wherein the EL817 isolation optocoupler isolates the digital tube position signal in the control signal obtained by the AIP1639 control chip and outputs it to the SS8550 transistor, and amplifies the signal through the SS8550 transistor.

[0017] Furthermore, the 485 communication circuit is also connected in series with a fuse and four voltage-stabilizing diodes, and the model of the voltage-stabilizing diodes is 3SMBJ5819B.

[0018] The beneficial effects of the present invention are:

[0019] Generally speaking, the utility model designs a bit signal amplification circuit and a segment signal amplification circuit in the digital display circuit on the basis of intrinsically safe treatment of each circuit in the digital display sound and light alarm, amplifies the control signal sent by the single-chip microcomputer on demand, abandons the use of multiple optocouplers or transistors to control the LED light string. It avoids the problem of wiring and welding errors that are easily caused by too many components, and also reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall closed loop of the alarm circuit of the utility model;

[0022] Figure 2 This is a schematic diagram of the power supply circuit in the utility model;

[0023] Figure 3 This is a schematic diagram of the digital display circuit in this utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings.

[0026] In this technical solution, if Figure 1 As shown in the figure, the mine intrinsically safe digital display sound and light alarm circuit includes: power supply circuit 1, single chip control circuit 2, voice circuit 3, traffic light display circuit 4, digital display circuit 5, and 485 communication circuit 6, among which:

[0027] like Figure 2As shown, the power supply circuit 1 includes an RY8326 power supply chip 103 and two anti-reverse SS34 diodes 104. The power supply circuit 1 is connected to an external 12V input voltage. After passing through the two anti-reverse SS34 diodes 104, the RY8326 power supply chip 103 outputs a 5V voltage, which is used to power the entire alarm circuit. On this basis, the power supply circuit 1 also includes an overvoltage protection circuit 101. The overvoltage protection circuit 101 includes an MCR106-8G thyristor and a ZMM5V1 voltage regulator. The MCR106-8G thyristor and the ZMM5V1 voltage regulator cooperate to monitor and protect the voltage in the power supply circuit 1. In addition, a group of D11 power indicator lights 102 are also connected in series at the output end of the power supply circuit 1. The lighting and extinguishing states of the D11 power indicator lights 102 are used to determine whether the power supply circuit 1 is powered.

[0028] In this technical solution, if Figure 1 As shown, the single-chip microcomputer control circuit 2 includes an STC8G1K08 single-chip microcomputer, the input end of the STC8G1K08 single-chip microcomputer is connected to the output end of the power supply circuit 1; the output end of the STC8G1K08 single-chip microcomputer is respectively connected to the voice circuit 3 and the traffic light display circuit 4 through two intermediate optical couplers 7; the output end of the STC8G1K08 single-chip microcomputer is also connected to the digital display circuit 5, wherein:

[0029] The intermediate optocoupler isolator 7 includes an intermediate diode and an intermediate transistor. The intermediate diode converts the input 5V electrical signal into an optical signal. The intermediate transistor receives the optical signal and converts it into an 11V electrical signal, which is then input into the voice circuit 3 and the traffic light display circuit 4.

[0030] The voice circuit 3 includes a voice selection circuit and a voice power amplifier circuit. The voice selection circuit includes four voice signal control terminals, namely P00, P01, P02, and P03. In addition, the voice selection circuit is adapted with the intermediate optocoupler isolator 7. After the voice selection circuit receives the control signal from the STC8G1K08 microcontroller through the intermediate optocoupler isolator 7, it outputs an analog signal from the four voice signal control terminals; the voice power amplifier circuit includes a WT9110B mono audio amplifier. The WT9110B mono audio amplifier amplifies the analog signal output by the voice selection circuit and outputs it to the speaker, which then plays the voice.

[0031] The traffic light display circuit 4 includes a red light part and a green light part, wherein the red light part is provided with a red light LED, and the red light LED is adapted to be equipped with an intermediate optocoupler isolator 7; in addition, the green light part is provided with a green light LED, and the green light LED is also adapted to be equipped with an intermediate optocoupler isolator 7.

[0032] In this embodiment, since the operating voltage of the STC8G1K08 microcontroller in the microcontroller control circuit 2 is 5V and the output driving current is limited, it cannot directly drive the red light LED and green light LED in the voice circuit 3 and the traffic light display circuit 4. Therefore, the intermediate optocoupler isolator 7 is used to amplify its driving capability, thereby driving the traffic light display circuit 4 and the voice circuit 3 to work in the alarm circuit. The driving capability of the intermediate optocoupler isolator 7 can reach 50V and 200mA, and the driving requirement of the traffic light display circuit 4 and the voice circuit 3 is DC11V, so the driving requirements are met.

[0033] In this technical solution, if Figure 3 As shown, the digital display circuit 5 includes an AIP1639 control chip 501, a bit signal amplifying circuit 502, a segment signal amplifying circuit 503, and several groups of LED light strings 504; wherein, after the AIP1639 control chip 501 receives the control signal from the STC8G1K08 microcontroller, it transmits the digital tube bit signal in the control signal to the bit signal amplifying circuit 502 for amplification; at the same time, the AIP1639 control chip 501 also transmits the digital tube segment signal in the control signal to the segment signal amplifying circuit 503 for amplification; the amplified digital tube bit signal and the digital tube segment signal are simultaneously output to the several groups of LED light strings 504, and the several groups of LED light strings 504 are lit.

[0034] Among them, the bit signal amplification circuit 502 includes two ULN2003 integrated inverter chips, which invert and amplify the digital tube bit signal in the control signal obtained by the AIP1639 control chip 501; the segment signal amplification circuit 503 includes an EL817 isolation optocoupler and an SS8550 transistor. Among them, the EL817 isolation optocoupler isolates the digital tube bit signal in the control signal obtained by the AIP1639 control chip 501 and outputs it to the SS8550 transistor, and amplifies the signal through the SS8550 transistor.

[0035] Based on the above embodiment, the STC8G1K08 single-chip microcomputer with its own operating voltage of 5V is also unable to directly drive each group of LED light strings 504 in the digital display circuit 5. Therefore, the AIP1639 control chip 501 is used in combination with the bit signal amplifier circuit 502 and the segment signal amplifier circuit 503 to amplify the control signal as needed, thereby completing the driving and lighting of several groups of LED light strings 504. The existing technology of using multiple optocouplers or transistors for driving connection mode to control the LED light strings 504 is abandoned, avoiding the problem of wiring and soldering errors easily caused by too many components, and also reducing production costs.

[0036] In this technical solution, if Figure 1As shown, the 485 communication circuit 6 is connected in series in the entire alarm circuit. The 485 communication circuit 6 is used for signal communication transmission in the entire alarm circuit. The 485 communication circuit 6 includes a MAX485 communication chip. The MAX485 communication chip converts the external signal received by the input end of the alarm circuit into a serial port signal recognized by the STC8G1K08 microcontroller. Then the STC8G1K08 microcontroller sends control instructions to the remaining circuits through the 485 communication circuit 6. In addition, the 485 communication circuit 6 is also connected in series with a fuse and four Zener diodes. The model of the Zener diode is 3SMBJ5819B.

[0037] Specifically, when a product based on the alarm circuit provided by the utility model is used to monitor the status of a mine damper and alarm, the mine intrinsically safe digital display sound and light alarm based on the alarm circuit provided by the utility model will be connected to the sensor, and intrinsically safe processing will be performed at the same time. After the power is turned on, the utility model can monitor and alarm the adjustment of the ventilation damper in the coal mine, thereby providing protection for safe production in the mine.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The mine intrinsically safe digital display sound and light alarm circuit is characterized by: include: A power supply circuit, including an RY8326 power supply chip, is connected to an external 12V input voltage and outputs a 5V voltage through the RY8326 power supply chip to power the entire alarm circuit; The single-chip microcomputer control circuit includes an STC8G1K08 single-chip microcomputer, wherein the input end of the STC8G1K08 single-chip microcomputer is connected to the output end of the power supply circuit; the output end of the STC8G1K08 single-chip microcomputer is respectively connected to the voice circuit and the traffic light display circuit through two intermediate optical couplers; the output end of the STC8G1K08 single-chip microcomputer is also connected to the digital display circuit, wherein: The intermediate optocoupler isolator includes an intermediate diode and an intermediate transistor. The intermediate diode converts the input 5V electrical signal into an optical signal. The intermediate transistor receives the optical signal and converts it into an 11V electrical signal, which is then input into the voice circuit and the traffic light display circuit. The voice circuit includes a voice selection circuit and a voice power amplifier circuit. The voice selection circuit includes four voice signal control terminals, namely P00, P01, P02, and P03. In addition, the voice selection circuit is adapted to be equipped with the intermediate optocoupler isolator. After receiving the control signal from the STC8G1K08 single-chip microcomputer through the intermediate optocoupler isolator, the voice selection circuit outputs an analog signal from the four voice signal control terminals; the voice power amplifier circuit includes a WT9110B mono audio amplifier. The WT9110B mono audio amplifier amplifies the analog signal output by the voice selection circuit and outputs it to the speaker, which then plays the voice. The traffic light display circuit includes a red light portion and a green light portion, wherein the red light portion is provided with a red light LED, and the red light LED is adapted to be equipped with the intermediate optocoupler isolator; in addition, the green light portion is provided with a green light LED, and the green light LED is also adapted to be equipped with the intermediate optocoupler isolator; The digital display circuit includes an AIP1639 control chip, a bit signal amplification circuit, a segment signal amplification circuit, and several groups of LED light strings. After receiving a control signal from an STC8G1K08 single-chip microcomputer, the AIP1639 control chip transmits the digital tube bit signal in the control signal to the bit signal amplification circuit for amplification. At the same time, the AIP1639 control chip also transmits the digital tube segment signal in the control signal to the segment signal amplification circuit for amplification. The amplified digital tube bit signal and digital tube segment signal are simultaneously output to the several groups of LED light strings, and the several groups of LED light strings are lit. A 485 communication circuit is connected in series in the entire alarm circuit. The 485 communication circuit is used for signal communication transmission in the entire alarm circuit. The 485 communication circuit includes a MAX485 communication chip. The MAX485 communication chip converts the external signal received by the input end of the alarm circuit into a serial port signal recognized by the STC8G1K08 microcontroller. Then the STC8G1K08 microcontroller sends control instructions to the remaining circuits through the 485 communication circuit.

2. The mine intrinsically safe digital display sound and light alarm circuit according to claim 1 is characterized in that: The power supply circuit also includes two SS34 diodes. After the external 12V input voltage passes through the two SS34 diodes, the RY8326 power supply chip outputs a 5V voltage. On this basis, the power supply circuit also includes an overvoltage protection circuit. The overvoltage protection circuit includes an MCR106-8G thyristor and a ZMM5V1 voltage regulator. The voltage in the power supply circuit is monitored and protected by the cooperation of the MCR106-8G thyristor and the ZMM5V1 voltage regulator. In addition, a group of D11 power indicator lights are connected in series at the output end of the power supply circuit. Whether the power supply circuit is powered is determined by the lighting and extinguishing states of the D11 power indicator lights.

3. The mine intrinsically safe digital display sound and light alarm circuit according to claim 1 is characterized in that: In the digital display circuit, the bit signal amplification circuit includes two ULN2003 integrated inverter chips, which invert and amplify the digital tube bit signal in the control signal obtained by the AIP1639 control chip.

4. The mine intrinsically safe digital display sound and light alarm circuit according to claim 3 is characterized in that: In the digital display circuit, the segment signal amplification circuit includes an EL817 isolation optocoupler and an SS8550 transistor, wherein the EL817 isolation optocoupler isolates the digital tube position signal in the control signal obtained by the AIP1639 control chip and outputs it to the SS8550 transistor, and amplifies the signal through the SS8550 transistor.

5. The mine intrinsically safe digital display sound and light alarm circuit according to claim 1 is characterized in that: The 485 communication circuit is further connected in series with a fuse and four voltage-stabilizing diodes, and the model of the voltage-stabilizing diodes is 3SMBJ5819B.

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