Dual-loop intelligent mine safety communication circuit and telephone set

Abstract

The application relates to a double-circuit intelligent mine safety communication circuit and a telephone, wherein the communication circuit comprises a double-circuit switching circuit electrically connected with a master processor of the telephone, which is used for receiving input signals entering a mine intrinsic safety automatic telephone; a telephone ringing signal detection circuit electrically connected with the master processor, which is used for receiving input alternating current signals entering the mine intrinsic safety automatic telephone; a telephone ringing circuit electrically connected with the telephone ringing signal detection circuit, which is used for receiving input alternating current signals of the telephone ringing signal detection circuit; and an audio signal processing and protocol communication circuit electrically connected with the master processor, which is used for receiving and sending voice and protocol signals. The double-circuit telephone access mode is adopted, when one of the two circuits is disconnected or short-circuited, the communication can still be guaranteed, and the safety of mine communication is ensured.

Description

Technical Field

[0001] This invention relates to the field of telephone technology, and in particular to a dual-circuit intelligent mine safety communication circuit and telephone. Background Technology

[0002] Mining telephones are suitable for dispatching and communication in mines containing explosive gases (methane and coal dust) and are equipped with emergency call functions. These telephones, along with program-controlled exchange dispatching systems, form an automatic telephone dispatching and communication system for coal mines. With the development of voice communication technology, safe underground communication in mines relies heavily on various communication terminals. Mining telephones have always been one of the commonly used communication methods in mining production. They are suitable for dispatching in mines containing explosive gas environments such as methane and coal dust, and are equipped with emergency call notification functions. The telephones and program-controlled dispatching hosts form an automatic telephone dispatching and communication system for mines. Conventional mining telephones have basic functions such as explosion-proof protection and voice communication. However, in some mine operations, if a communication line breaks or short-circuits, safe underground communication cannot be guaranteed, making it impossible to respond to emergencies and notify evacuees, which can easily lead to safety accidents.

[0003] While many mining telephone terminals are currently available on the domestic and international markets, their design principles are all based on single-line communication. Underground mines are typically complex and humid environments, making cable lines prone to problems. Short circuits or open circuits can render the telephone terminals unusable. Furthermore, the command center cannot visually detect these short circuits or open circuits through the human-machine interface, resulting in emergency communication disruptions and increasing the risk of mining safety accidents. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dual-circuit intelligent mine safety communication circuit and telephone. It adopts a dual-circuit telephone access method, which can still ensure uninterrupted communication when one of the lines is disconnected or short-circuited, thus providing a safety guarantee for mine communication.

[0005] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0006] A dual-loop intelligent mine safety communication circuit, comprising:

[0007] A dual-circuit switching circuit electrically connected to the main control processor of the telephone is used to receive input signals entering the intrinsically safe automatic telephone for mining.

[0008] The telephone ringing signal detection circuit, which is electrically connected to the main control processor, is used to receive the input AC signal entering the intrinsically safe automatic telephone for mining.

[0009] The telephone ringing circuit, which is electrically connected to the telephone ringing signal detection circuit, is used to receive the input AC signal from the telephone ringing signal detection circuit.

[0010] The audio signal processing and protocol communication circuit, which is electrically connected to the main control processor, is used to receive and send voice and protocol signals.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the dual-circuit switching circuit receives the input signal from the intrinsically safe automatic telephone for mining use; the two sets of input signals of the dual-circuit switching circuit pass through the overcurrent protection circuit composed of 1RT1 and 1RT2, 2RT1 and 2RT2 respectively; the other ends of 1RT1 and 1RT2, 2RT1 and 2RT2 are electrically connected to pins 2 and 7 of relays 1RL1 and 2RL1 respectively; pins 3 and 6 of relays 1RL1 and 2RL1 are electrically connected to terminals JP2 and JP3 respectively; and simultaneously connected to pins 1 and 2 of full-bridge ZD3 and ZD2 to form a dual-circuit reverse insertion protection circuit.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the telephone ringing signal detection circuit receives the input AC signal from the intrinsically safe automatic telephone used in mining; pins 3 and 4 of the full-bridge ZD3 and ZD2 are connected in parallel and then connected to the suppressor ZNR1 to form an overvoltage protection circuit; pin 1 of the suppressor ZNR1 is filtered out by an LC parallel circuit.

[0013] One pin of the output of the LC parallel circuit is connected to resistor R6, and the other end of R6 is connected to capacitor C1. The other pin of the output of the LC parallel circuit is connected to resistor R7, and the other end of R7 is connected to capacitor C2. The outputs of capacitors C1 and C2 are connected to the full-bridge U2 to convert DC power. The negative terminal of the full-bridge U2 is connected to GND, and the positive terminal of the full-bridge U2 is connected to resistor R5. The other end of R5 is connected to resistor R8 and capacitor C6 in parallel to GND and also connected to resistor R57. The other end of R57 is connected to the microcontroller.

[0014] The output terminals of the LC parallel circuit are connected to capacitors C4 and C3 respectively. C4 and C3 are connected to resistors R3 and R2 respectively. The other end of R3 and R2 is connected to resistor R4 and capacitor C5 in parallel. The two ends of R4 and C5 are connected to a microcontroller.

[0015] In a preferred embodiment, the present invention can be further configured as follows: the telephone ringing circuit receives the input AC signal of the telephone ringing signal detection circuit, the output of the LC parallel circuit converts the AC signal of the ringing current into a DC signal through the full bridge U1, pin 3 of the output of U1 is connected to R50, R51, and R52 in parallel, the output of R50, R51, and R52 in parallel is connected to electrolytic capacitors C17 and C19, and the negative terminals of C17 and C19 are connected to GND;

[0016] The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to resistor R45. The other end of R45 is connected to the base of transistor Q11 and the drain of MOSFET Q10.

[0017] The gate of Q10 is connected to the microcontroller's ringing current control pin through a resistor R44 and a diode D2 in parallel, and the source of Q10 is connected to GND.

[0018] The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to resistor R46, and the other end of R46 is connected to resistor R47 and the gate of MOSFET Q14.

[0019] The other end of resistor R47 is connected to the collector of transistor Q11, and the emitter of Q11 is connected to GND.

[0020] The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to the drain of MOSFET Q14;

[0021] The source of Q14 is connected to the source of MOSFET Q13. The gate of Q13 is connected to the microcontroller's ringing current control pin through resistor R48 and diode D3 in parallel, and is also connected to capacitor C20. The other end of C20 is connected to GND, and the source of Q13 is connected to GND.

[0022] The source of Q14 is connected to resistor R49, and the other end of R49 is connected to capacitor C22. The output terminal of C22 is connected to the positive terminal of the buzzer.

[0023] In a preferred embodiment, the present invention can be further configured as follows: the audio signal processing and protocol communication circuit receives and sends voice and protocol signals, pin 3 of the output terminal of U1 is connected to resistor R1, the other end of R1 is connected to resistor R34, the other end of R34 is connected to C7 to GND, and is also connected to the microcontroller.

[0024] Connect capacitor C18 to pin 3 of the output terminal of U1. Connect the other end of C18 to resistor R58. Connect the other end of R58 to the base of transistor Q4. Connect resistor R59 to GND. Connect the emitter of Q4 to GND.

[0025] Pin 3 of the output terminal of U1 is connected to resistor R9. The other end of R9 is connected to resistor R11. The other end of R11 is connected to resistor R38. The other end of R38 is connected to resistor R41 to GND. Simultaneously, resistor R12 is connected. The other end of R12 is connected to the collector of Q4 and the base of transistor Q2.

[0026] Pin 3 of the output terminal of U1 is connected to both resistor R13 and the emitter of transistor Q1. The other end of R13 and the base of Q1 are connected to both resistor R14. The other end of R14 is connected to resistor R39. The other end of R39 is connected to the collector of Q2. The emitter of Q2 is connected to GND.

[0027] The collector of Q1 is connected to the parallel connection of Zener diode Z1 and capacitor C8 to GND. The collector of Q1 is also connected to resistor R17. The other end of R17 is connected to resistor R40. The other end of R40 is connected to capacitor E3 to GND and resistor R18. The other end of R18 is connected to the base of transistor Q12. The other end of R18 is also connected to capacitor C11. The other end of C11 is connected to resistor R20 to GND. The other end of R18 is also connected to capacitor C12. The other end of C12 is connected to resistor R37. The other end of R37 is connected to capacitor C21 to GND.

[0028] The collector of Q1 is connected to both the collector of Q12 and the collector of Q15. The emitter of Q15 is connected to resistor R60 to GND.

[0029] Pin 3 of the output terminal of U1 is connected to the collector of transistor Q9. The emitter of Q9 is connected to resistor R61 to GND. The base of Q9 is connected to the base of transistor Q15 through the parallel connection of resistor R62 and capacitor C36.

[0030] The collector of Q1 is connected to R24, then R43 in series, then C10 in parallel, and then to resistor R25. The other end of R25 is connected to resistor R21 to the emitter of Q12. The emitter of Q12 is connected to capacitor C13 and resistor R23 in parallel to capacitor C12.

[0031] The other end of R25 is connected to capacitor C14, and resistor R26 is connected in parallel with diode D7 in series. The other end of R25 is connected to capacitor C15 and capacitor E6 to GND.

[0032] The other end of R25 is connected to diode D10, the other end of D10 is connected to resistor R56, and the other end of R56 is connected to indicator light.

[0033] The other end of C14 is connected to diode D9 to VDD. The other end of C14 is connected to resistor R27, the emitter of transistor Q5, and the collector of transistor Q6. The other end of R27 is connected to the base of transistor Q5. The other end of R25 is connected to capacitor E5 to the output of R27. The other end of R27 is connected to resistor R28 and capacitor C16 in parallel to the emitter of transistor Q6. The collector of transistor Q5 is connected to the base of transistor Q6. At the same time, resistor R30 is connected to the emitter of transistor Q6. The emitter of Q6 is connected to resistor R32 to the handle horn. The emitter of Q6 is connected to resistor R29 to GND. The emitter of Q6 is connected to resistor R31.

[0034] The other end of resistor R31 is connected to pin 5 of the on / off button. The other end of resistor R31 is connected to resistor R33 to the microcontroller. The other end of resistor R31 is connected to capacitor E7. The other end of capacitor E7 is connected to the positive terminal of LED3 and the base of transistor Q7. The emitter of Q7 is connected to VDD. The collector of Q7 is connected to capacitor E9 to the speaker. The collector of Q7 is also connected to transistor Q8. The emitter of Q8 is connected to GND. The negative terminal of LED3 is connected to the base of Q8.

[0035] The present invention also provides a dual-circuit intelligent mine safety communication telephone, including a main control processor; and the dual-circuit intelligent mine safety communication circuit as described above.

[0036] In a preferred embodiment, the present invention can be further configured such that: the main control processor is electrically connected to a wireless Wi-Fi Bluetooth module, a human-computer interaction module, and a power supply module; the wireless Wi-Fi Bluetooth module is used to interact with the main control processor; the human-computer interaction module is used to implement human-computer interaction; and the power supply module is used to supply power to the telephone.

[0037] In summary, the present invention has at least one of the following beneficial technical effects:

[0038] 1. The dual-circuit telephone circuit and telephone disclosed in this invention provide safety assurance for mine communication. Through the dual-circuit telephone, the mine dispatching machine can directly select the dual-circuit telephone for access. The direct technical effect is that the disconnection or short circuit of one of the lines does not affect the connection. For example, if the dual-circuit mine telephone numbers are 8001 and 8002, and the 8001 line is short-circuited, the telephone usage remains unchanged. Any other terminal can continue to call 8001, and the call will still go through, thus ensuring safe underground communication in the mine.

[0039] 2. The invention of the dual-circuit telephone circuit and telephone supports the detection of telephones without a terminal connected to the line. Conventional circuit boards must be connected to the hardware terminal telephone, but this invention does not need to determine whether a terminal is connected. The status can be detected even if the telephone line is not connected or has been maliciously unplugged.

[0040] 3. The invention of dual-circuit telephone circuits and telephones allows the terminal telephone to automatically pick up the receiver after being called, without the need for manual intervention. The automatic pick-up function automatically broadcasts relevant voice notifications or emergency voice notifications for safety emergencies. Attached Figure Description

[0041] Figure 1 This invention presents an overall structural block diagram of the communication circuit.

[0042] Figure 2 The circuit diagram of the dual-loop switching circuit is shown for this invention.

[0043] Figure 3 The circuit diagram shown here illustrates the telephone ringing signal detection circuit of this invention.

[0044] Figure 4 The circuit diagram of the telephone ringing circuit is shown for this invention.

[0045] Figure 5 The circuit diagram shown here illustrates the audio signal processing and protocol communication circuitry for this invention.

[0046] Reference numerals in the attached diagram: 1. Main control processor; 2. Dual-loop switching circuit; 3. Telephone ringing signal detection circuit; 4. Telephone ringing circuit; 5. Audio signal processing and protocol communication circuit. Detailed Implementation

[0047] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be noted that the term "connection" refers to electrical connection; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] Example 1:

[0050] Reference Figure 1 The present invention discloses a dual-loop intelligent mine safety communication circuit, comprising:

[0051] The dual-loop switching circuit 2, electrically connected to the main control processor 1 of the telephone, is used to receive input signals from the intrinsically safe automatic telephone used in the mine; the telephone ringing signal detection circuit 3, electrically connected to the main control processor 1, is used to receive input AC signals from the intrinsically safe automatic telephone used in the mine; the telephone ringing signal detection circuit 4, electrically connected to the telephone ringing signal detection circuit 3, is used to receive input AC signals from the telephone ringing signal detection circuit 3; and the audio signal processing and protocol communication circuit 5, electrically connected to the main control processor 1, is used to receive and send voice and protocol signals.

[0052] Reference Figure 2 The dual-circuit switching circuit 2 receives two non-intrinsically safe signals (DC and ringing current signals) from the ground dispatcher. After passing through the mine safety coupler, it outputs intrinsically safe signals, which are then delivered to the mine intrinsically safe explosion-proof telephone via the mine flame-retardant communication optical cable or cable. The two sets of input signals of the dual circuit pass through the overcurrent protection circuit composed of thermistors 1RT1 and 1RT2, 2RT1 and 2RT2. The other ends of 1RT1 and 1RT2, 2RT1 and 2RT2 are connected to pins 2 and 7 of relays 1RL1 and 2RL1, respectively. Pins 3 and 6 of relays 1RL1 and 2RL1 are connected to terminals JP2 and JP3, respectively. When a short circuit or open circuit is detected in one of the dual circuits, it is turned off. At the same time, it is connected to pins 1 and 2 of the full-bridge ZD3 and ZD2 to form the dual-circuit access reverse insertion protection circuit.

[0053] Reference Figure 3The telephone ringing signal detection circuit 3 receives the input AC signal from the intrinsically safe explosion-proof telephone used in the mine. Pins 3 and 4 of the full-bridge circuit ZD3 and ZD2 are connected in parallel and then connected to the suppressor ZNR1 to form an overvoltage protection circuit. Pin 1 of the suppressor ZNR1 is filtered out by the LC parallel circuit (L2, C34). One pin of the output of the LC parallel circuit is connected to resistor R6, and the other end of R6 is connected to capacitor C1. The other pin of the output of the LC parallel circuit is connected to resistor R7, and the other end of R7 is connected to capacitor C2 (capacitors C1 and C2 block the input DC signal). The output of capacitors C1 and C2 is connected to the AC terminal of the full-bridge circuit U2 and converted into DC power. The negative terminal of the full-bridge circuit U2 is connected to GND, and the positive terminal of the full-bridge circuit U2 is connected to resistor R5. The other end of R5 is connected to resistor R8 and capacitor C6 in parallel to GND and also connected to resistor R57. The other end of R57 is connected to the microcontroller for ringing signal acquisition. The output terminals of the LC parallel circuit are connected to capacitors C4 and C3 respectively (capacitors C3 and C4 block the input DC signal). C4 and C3 are connected to resistors R3 and R2 respectively. The other ends of R3 and R2 are connected to resistor R4 and capacitor C5 in parallel. The two ends of R4 and C5 are connected to the microcontroller for signal acquisition.

[0054] Reference Figure 4 The telephone ringing circuit 4 receives the input signal from the intrinsically safe automatic telephone used in the mine. The output of the LC parallel circuit converts the AC signal of the ringing current into a DC signal through the full-bridge U1. Pin 3 of the output of U1 is connected to R50, R51, and R52 in parallel. The output of R50, R51, and R52 in parallel is connected to electrolytic capacitors C17 and C19 to make the waveform smoother. The negative terminals of C17 and C19 are connected to GND. The output of R50, R51, and R52 in parallel is also connected to resistor R45. The other end of R45 is connected to the base of transistor Q11 and the drain of MOSFET Q10. The gate of Q10 is connected to the microcontroller's ringing current control pin through resistor R44 and diode D2 in parallel. The source of Q10 is connected to GND. R50, The output terminals of resistors R51 and R52 connected in parallel are simultaneously connected to resistor R46. The other end of R46 is connected to resistor R47 and the gate of MOSFET Q14. The other end of resistor R47 is connected to the collector of transistor Q11, and the emitter of Q11 is connected to GND. The output terminals of resistors R50, R51, and R52 connected in parallel are simultaneously connected to the drain of MOSFET Q14. The source of Q14 is connected to the source of MOSFET Q13. The gate of Q13 is connected to the microcontroller's ringing current control pin via resistor R48 and diode D3 in parallel, and is also connected to capacitor C20. The other end of C20 is connected to GND, and the source of Q13 is connected to GND. The source of Q14 is also connected to resistor R49. The other end of R49 is connected to capacitor C22, and the output terminal of C22 is connected to the positive terminal of the buzzer.

[0055] The microcontroller outputs the required ringing signal from the VOL pin based on the detected AC signal. When VOL is low, Q10 is off, Q11 is on, Q14 is on, and Q13 is off, and the +48V voltage is stepped down to power the buzzer. When VOL is high, Q10 is on, Q11 is off, Q14 is off, and Q13 is turned on after a delay, and the positive terminal of the buzzer is connected to GND through Q13.

[0056] Reference Figure 5 The telephone audio signal processing and protocol communication circuit 5 receives and sends voice and protocol signals, enabling voice exchange and communication between the explosion-proof telephone and the dispatch host. The positive terminal of U1 is connected to resistor R1, the other end of R1 is connected to resistor R34, and the other end of R34 is connected to C7 to GND, simultaneously connected to the microcontroller for signal acquisition.

[0057] The positive terminal of U1's output is simultaneously connected to capacitor C18, the other end of which is connected to resistor R58. The other end of R58 is connected to the base of transistor Q4 (and simultaneously connected to resistor R59 to GND, which detects that Q4 is turned on when the phone is ringing, controlling the back-end to not work). The emitter of Q4 is connected to GND. The positive terminal of U1's output is simultaneously connected to resistor R9, the other end of which is connected to resistor R11, the other end of which is connected to resistor R38, the other end of which is connected to resistor R41 to GND, and simultaneously connected to resistor R12. The other end of R12 is connected to the collector of Q4 and the base of transistor Q2.

[0058] The positive terminal of U1's output is simultaneously connected to resistor R13 and the emitter of transistor Q1. The other end of R13 and the base of Q1 are simultaneously connected to resistor R14. The other end of R14 is connected to resistor R39. The other end of R39 is connected to the collector of Q2. The emitter of Q2 is connected to GND (the switching of transistors Q1 and Q2 is controlled by Q4). The collector of Q1 is connected to the parallel connection of Zener diode Z1 and capacitor C8 to GND. The collector of Q1 is simultaneously connected to resistor R17. The other end of R17 is connected to resistor R40. The other end of R40 is connected to capacitor E3 to GND and simultaneously connected to resistor R18. The other end of R18 is connected to the base of transistor Q12. The other end of R18 is simultaneously connected to capacitor C11. The other end of C11 is connected to resistor R20 to GND. The other end of R18 is simultaneously connected to capacitor C12. The other end of C12 is connected to resistor R37. The other end of R37 is connected to capacitor C21 to GND.

[0059] The collector of Q1 is connected to the collector of both Q12 and Q15. The emitter of Q15 is connected to GND via resistor R60. The positive output of U1 is connected to the collector of Q9. The emitter of Q9 is connected to GND via resistor R61. The base of Q9 is connected to the base of Q15 via resistor R62 and capacitor C36 in parallel (communication between the explosion-proof telephone and the dispatch host will be completed through this circuit).

[0060] The collector of Q1 is connected to resistor R24, then in series with resistor R43, then in parallel with capacitor C10, and finally to resistor R25. The other end of R25 is connected to resistor R21 to the emitter of Q12. The emitter of Q12 is connected to capacitor C13 and the parallel connection of resistor R23 to capacitor C12, and also to the positive terminal of the microphone on the handset. The other end of R25 is connected to capacitor C14, and in parallel with resistor R26, in series with diode D7. The other end of R25 is connected to capacitors C15 and E6 to GND. The other end of R25 is connected to diode D10, and the other end of D10 is connected to resistor R56. The other end of R56 is connected to the indicator light. The other end of C14 is connected to the diode... Connect transistor D9 to VDD. Connect the other end of C14 to resistor R27, the emitter of transistor Q5, and the collector of transistor Q6. Connect the other end of R27 to the base of transistor Q5. Connect the other end of R25 to capacitor E5 and then to the output of R27. Connect the other end of R27 to resistor R28 and capacitor C16 in parallel to the emitter of transistor Q6. Connect the collector of transistor Q5 to the base of transistor Q6. Connect resistor R30 to the emitter of transistor Q6. Connect the emitter of Q6 to resistor R32 and then to the horn. Connect the emitter of Q6 to resistor R29 and then to GND. Connect the emitter of Q6 to resistor R31.

[0061] The other end of resistor R31 is connected to pin 5 of the on / off switch. The other end of resistor R31 is connected to resistor R33 to the microcontroller. The other end of resistor R31 is connected to capacitor E7. The other end of capacitor E7 is connected to the positive terminal of LED3 and the base of transistor Q7. The emitter of Q7 is connected to VDD. The collector of Q7 is connected to capacitor E9 to the speaker. The collector of Q7 is also connected to transistor Q8. The emitter of Q8 is connected to GND. The negative terminal of LED3 is connected to the base of Q8. Pin 1 of the on / off switch is connected to resistor R35 to VDD, capacitor C33 to GND, and resistor R53 to the microcontroller for detecting whether the explosion-proof phone is on or off.

[0062] Example 2:

[0063] The present invention also provides a dual-circuit intelligent mine safety communication telephone, including a main control processor 1; and a dual-circuit intelligent mine safety communication circuit as described in Embodiment 1 above.

[0064] The main control processor 1 is electrically connected to a wireless Wi-Fi and Bluetooth module, a human-machine interaction module, and a power supply module. The wireless Wi-Fi and Bluetooth module is used to interact with the main control processor 1, the human-machine interaction module is used to realize human-machine interaction, and the power supply module is used to supply power to the telephone.

[0065] The wireless WiFi and Bluetooth module is connected to a smart antenna module. The smart antenna module is used to transmit and receive wireless signals and interacts with the wireless WiFi and Bluetooth module. The wireless WiFi and Bluetooth module interacts with the main control processor 1 to transmit and receive wireless signals from the smart antenna module.

[0066] The power supply module, electrically connected to the main control processor 1, includes a power management chip and a lithium battery electrically connected to the power management chip. The lithium battery, combined with low-power software and hardware design, enhances standby time, eliminates the need for traditional wired charging, and facilitates portability. The human-machine interface module, also electrically connected to the main control processor 1, includes a large-size display screen for displaying various information.

[0067] The implementation principle of this embodiment is as follows: Although there are many mining telephone terminals on the domestic and international markets, their design is based on single-line communication. The underground environment is complex and humid, making cable lines prone to problems. If a short circuit or open circuit occurs, the terminal telephone becomes unusable. Simultaneously, the command center cannot visually see notifications of short circuits or open circuits in the underground terminal through the human-machine interface, resulting in emergency telephone communication failures and potentially causing mining safety accidents. To address these shortcomings, this invention aims to provide a dual-circuit intelligent mining safety communication circuit and telephone. Through technological research and development, and analysis of current telephone communication principles, a dual-circuit access communication circuit telephone hardware has been developed, enabling simultaneous access of two dispatch voice lines to the same telephone board terminal.

[0068] Invention features: a) The handset circuit board supports short circuits and open circuits in any line without affecting communication; b) The handset circuit board can simultaneously detect when the hardware terminal is not connected at the line end, such as when the handset circuit board line is not connected or the line is maliciously unplugged, the local exchange program control dispatch host connected to the handset board terminal can detect it in real time; c) It supports short circuit and open circuit detection pop-up alarm reminders on the dispatch host PC side line to the handset circuit board, and log records are traceable.

[0069] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dual-circuit intelligent mine safety communication circuit, characterized in that, include: A dual-loop switching circuit (2) electrically connected to the main control processor (1) of the telephone is used to receive input signals entering the intrinsically safe automatic telephone for mining; The telephone ringing signal detection circuit (3), which is electrically connected to the main control processor (1), is used to receive the input AC signal entering the intrinsically safe automatic telephone for mining; The telephone ringing circuit (4), which is electrically connected to the telephone ringing signal detection circuit (3), is used to receive the input AC signal of the telephone ringing signal detection circuit (3); The audio signal processing and protocol communication circuit (5), which is electrically connected to the main control processor (1), is used to receive and send voice and protocol signals; The dual-circuit switching circuit (2) receives the input signal from the intrinsically safe automatic telephone for mining. The two sets of input signals of the dual-circuit switching circuit (2) pass through the overcurrent protection circuit composed of 1RT1 and 1RT2, 2RT1 and 2RT2 respectively. The other ends of 1RT1 and 1RT2, 2RT1 and 2RT2 are electrically connected to pins 2 and 7 of relays 1RL1 and 2RL1 respectively. Pins 3 and 6 of relays 1RL1 and 2RL1 are electrically connected to terminals JP2 and JP3 respectively. At the same time, they are electrically connected to pins 1 and 2 of the full bridge ZD3 and ZD2 to form a dual-circuit access reverse insertion protection circuit.

2. The dual-loop intelligent mine safety communication circuit according to claim 1, characterized in that: The telephone ringing signal detection circuit (3) receives the input AC signal from the intrinsically safe automatic telephone in the mine. The 3rd and 4th pins of the full bridge ZD3 and ZD2 are connected in parallel and then connected to the suppressor ZNR1 to form an overvoltage protection circuit. The 1st pin of the suppressor ZNR1 is filtered out by the LC parallel circuit. One pin of the output of the LC parallel circuit is connected to resistor R6, and the other end of R6 is connected to capacitor C1. The other pin of the output of the LC parallel circuit is connected to resistor R7, and the other end of R7 is connected to capacitor C2. The outputs of capacitors C1 and C2 are connected to the full-bridge U2 to convert DC power. The negative terminal of the full-bridge U2 is connected to GND, and the positive terminal of the full-bridge U2 is connected to resistor R5. The other end of R5 is connected to resistor R8 and capacitor C6 in parallel to GND and also connected to resistor R57. The other end of R57 is connected to the microcontroller. The output terminals of the LC parallel circuit are connected to capacitors C4 and C3 respectively. C4 and C3 are connected to resistors R3 and R2 respectively. The other end of R3 and R2 is connected to resistor R4 and capacitor C5 in parallel. The two ends of R4 and C5 are connected to a microcontroller.

3. The dual-loop intelligent mine safety communication circuit according to claim 2, characterized in that: The telephone ringing circuit (4) receives the input AC signal from the telephone ringing signal detection circuit (3). The output of the LC parallel circuit converts the AC signal of the ringing current into a DC signal through the full bridge U1. Pin 3 of the output of U1 is connected to R50, R51, and R52 in parallel. The output of R50, R51, and R52 in parallel is connected to electrolytic capacitors C17 and C19. The negative terminals of C17 and C19 are connected to GND. The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to resistor R45. The other end of R45 is connected to the base of transistor Q11 and the drain of MOSFET Q10. The gate of Q10 is connected to the microcontroller's ringing current control pin through a resistor R44 and a diode D2 in parallel, and the source of Q10 is connected to GND. The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to resistor R46, and the other end of R46 is connected to resistor R47 and the gate of MOSFET Q14. The other end of resistor R47 is connected to the collector of transistor Q11, and the emitter of Q11 is connected to GND. The output terminals of R50, R51, and R52 connected in parallel are simultaneously connected to the drain of MOSFET Q14; The source of Q14 is connected to the source of MOSFET Q13. The gate of Q13 is connected to the microcontroller's ringing current control pin through resistor R48 and diode D3 in parallel, and is also connected to capacitor C20. The other end of C20 is connected to GND, and the source of Q13 is connected to GND. The source of Q14 is connected to resistor R49, and the other end of R49 is connected to capacitor C22. The output terminal of C22 is connected to the positive terminal of the buzzer.

4. The dual-loop intelligent mine safety communication circuit according to claim 3, characterized in that: The audio signal processing and protocol communication circuit (5) receives and sends voice and protocol signals. Pin 3 of the output terminal of U1 is connected to resistor R1, the other end of R1 is connected to resistor R34, the other end of R34 is connected to C7 to GND, and is also connected to the microcontroller. Connect capacitor C18 to pin 3 of the output terminal of U1. Connect the other end of C18 to resistor R58. Connect the other end of R58 to the base of transistor Q4. Connect resistor R59 to GND. Connect the emitter of Q4 to GND. Pin 3 of the output terminal of U1 is connected to resistor R9. The other end of R9 is connected to resistor R11. The other end of R11 is connected to resistor R38. The other end of R38 is connected to resistor R41 to GND. Simultaneously, resistor R12 is connected. The other end of R12 is connected to the collector of Q4 and the base of transistor Q2. Pin 3 of the output terminal of U1 is connected to both resistor R13 and the emitter of transistor Q1. The other end of R13 and the base of Q1 are connected to both resistor R14. The other end of R14 is connected to resistor R39. The other end of R39 is connected to the collector of Q2. The emitter of Q2 is connected to GND. The collector of Q1 is connected to the parallel connection of Zener diode Z1 and capacitor C8 to GND. The collector of Q1 is also connected to resistor R17. The other end of R17 is connected to resistor R40. The other end of R40 is connected to capacitor E3 to GND and resistor R18. The other end of R18 is connected to the base of transistor Q12. The other end of R18 is also connected to capacitor C11. The other end of C11 is connected to resistor R20 to GND. The other end of R18 is also connected to capacitor C12. The other end of C12 is connected to resistor R37. The other end of R37 is connected to capacitor C21 to GND. The collector of Q1 is connected to both the collector of Q12 and the collector of transistor Q15. The emitter of Q15 is connected to resistor R60 to GND. Pin 3 of the output terminal of U1 is connected to the collector of transistor Q9. The emitter of Q9 is connected to resistor R61 to GND. The base of Q9 is connected to the base of transistor Q15 through the parallel connection of resistor R62 and capacitor C36. The collector of Q1 is connected to R24, then R43 in series, then C10 in parallel, and then to resistor R25. The other end of R25 is connected to resistor R21 to the emitter of Q12. The emitter of Q12 is connected to capacitor C13 and resistor R23 in parallel to capacitor C12. The other end of R25 is connected to capacitor C14, and resistor R26 is connected in parallel with diode D7 in series. The other end of R25 is connected to capacitor C15 and capacitor E6 to GND. The other end of R25 is connected to diode D10, the other end of D10 is connected to resistor R56, and the other end of R56 is connected to indicator light. The other end of C14 is connected to diode D9 to VDD. The other end of C14 is connected to resistor R27, the emitter of transistor Q5, and the collector of transistor Q6. The other end of R27 is connected to the base of transistor Q5. The other end of R25 is connected to capacitor E5 to the output of R27. The other end of R27 is connected to resistor R28 and capacitor C16 in parallel to the emitter of transistor Q6. The collector of transistor Q5 is connected to the base of transistor Q6. At the same time, resistor R30 is connected to the emitter of transistor Q6. The emitter of Q6 is connected to resistor R32 to the handle horn. The emitter of Q6 is connected to resistor R29 to GND. The emitter of Q6 is connected to resistor R31. The other end of resistor R31 is connected to pin 5 of the on / off button. The other end of resistor R31 is connected to resistor R33 to the microcontroller. The other end of resistor R31 is connected to capacitor E7. The other end of capacitor E7 is connected to the positive terminal of LED3 and the base of transistor Q7. The emitter of Q7 is connected to VDD. The collector of Q7 is connected to capacitor E9 to the speaker. The collector of Q7 is also connected to transistor Q8. The emitter of Q8 is connected to GND. The negative terminal of LED3 is connected to the base of Q8.

5. A dual-circuit intelligent mine safety communication telephone, characterized in that: It includes a main control processor (1); and a dual-loop intelligent mining safety communication circuit as described in any one of claims 1 to 4.

6. A dual-circuit intelligent mine safety communication telephone according to claim 5, characterized in that: The main control processor (1) is electrically connected to a wireless WiFi Bluetooth module, a human-computer interaction module, and a power supply module. The wireless WiFi Bluetooth module is used to interact with the main control processor (1) via signals. The human-computer interaction module is used to realize human-computer interaction. The power supply module is used to supply power to the telephone.

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