A combustible gas alarm controller with 16 analog outputs

Abstract

The present invention provides a combustible gas alarm controller with 16 analog line outputs, which has the function of converting detector signals into highly anti-interference current analog quantities for multi-point transmission. Not only is the signal transmission anti-interference ability strong and reliability is increased, but it is also more convenient to use and has strong applicability. It includes a detector signal input module, the input end of the detector signal input module is connected to the output end of each sub-detector signal, the output end of the detector signal input module is connected to the input end of the sub-control module, and the output end of the sub-control module is connected to the input end of the sub-control bus output module; the input end of the main control bus input module is connected to the output end of the sub-control bus output module, the output end of the main control bus input module is connected to the input end of the main control module, and the output end of the main control module is connected to the input end of the multi-line current analog output module, and the 16-line current analog output is transmitted to multiple points through the multi-line current analog output module.

Description

Technical Field

[0001] The present invention relates to the technical field of alarm controllers, in particular to a combustible gas alarm controller with 16-channel analog quantity branch line outputs. Background Art

[0002] Combustible gas alarm controllers and their associated combustible gas detectors form a real-time, multi-point monitoring and alarm system for measuring the concentration of combustible gases and vapors in the air. Widely used in various industries involving combustible gases, such as petroleum and natural gas, petrochemicals, metallurgy, and oil depots, these systems are crucial for ensuring factory and personal safety. However, existing combustible gas monitoring and alarm systems only have bus-based digital outputs. This makes them susceptible to interference from line length and electromagnetic fields along the way, resulting in weak anti-interference capabilities for transmitted signals and, in severe cases, compromising data transmission reliability. Furthermore, these systems only provide centralized transmission of detector signals, lacking the ability to disperse and group detector signals to different destinations. This results in inconvenience, poor user experience, and poor applicability of these systems. Summary of the Invention

[0003] In view of the problems that the existing combustible gas monitoring and alarm system only has bus-type digital output, which leads to poor anti-interference ability of signal transmission and affects reliability. At the same time, it does not have the dispersed ability to transmit detector signals in groups to different destinations, resulting in inconvenience, poor experience and poor applicability during use, the present invention provides a combustible gas alarm controller with 16-channel analog branch output, which has the function of converting multiple detector signals into highly anti-interference current analog quantities for multi-point transmission. Not only does it have strong anti-interference ability of signal transmission and increase reliability, but it is also more convenient to use and has increased applicability.

[0004] The technical solution is as follows: a combustible gas alarm controller with 16 analog line outputs, which includes a main module and is characterized in that: it also includes a detector input module connected to the main module, the detector input module includes a detector signal input module, a sub-control module, and a sub-control bus output module, the input end of the detector signal input module is connected to the output end of each sub-detector signal, the output end of the detector signal input module is connected to the input end of the sub-control module, and the output end of the sub-control module is connected to the input end of the sub-control bus output module;

[0005] The main module includes a main control bus input module, a main control module and a multi-branch current analog output module. The input end of the main control bus input module is connected to the output end of the branch control bus output module, the output end of the main bus input module is connected to the input end of the main control module, and the output end of the main control module is connected to the input end of the multi-branch current analog output module. The 16-channel current analog output is transmitted to multiple points through the multi-branch current analog output module.

[0006] It is further characterized in that: the detector signal input module includes XIN1 to XIN16 signal detection points connected to the output ends of each detector, the XIN1 to XIN16 signal detection points are respectively connected to one end of the fuses F23 to F38 in a one-to-one correspondence, the other ends of the fuses F23 to F38 are respectively connected to one end of the resistors R44 to R59 in a one-to-one correspondence, the other ends of the resistors R44 to R59 are connected to the ground, and the other ends of the resistors R44 to R59 are also respectively connected to the voltage regulator diodes T VS7 is connected to one end of TVS22, and the other ends of the voltage-stabilizing diodes TVS7 to TVS22 are connected to one end of resistors R7 to R19 respectively. The other ends of the resistors R7 to R19 output Y0 to Y15 signal sources respectively. The Y0 to Y7 signal sources are connected to pins 13, 14, 15, 12, 1, 5, 2, and 4 of the 8-to-1 multiplexer U3 respectively. Pins 6 to 8 of the 8-to-1 multiplexer U3 are connected and then grounded. Pin 3 of the 8-to-1 multiplexer U3 is connected to the 8-to-1 multiplexer U2 Pin 13 of the 8-to-1 multiplexer U3 is connected to the sub-control module, pin 9 to pin 11 of the 8-to-1 multiplexer U3 is connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U3 is connected to one end of the capacitor C19 and the 5V voltage source, and the other end of the capacitor C19 is grounded, and the Y8 to Y15 signal sources are respectively connected to pins 13, 14, 15, 12, 1, 5, 2, and 4 of the 8-to-1 multiplexer U4 in a one-to-one correspondence, pins 6 to 8 of the 8-to-1 multiplexer U4 are connected and then grounded, and pin 3 of the 8-to-1 multiplexer U4 is connected to pin 14 of the 8-to-1 multiplexer U2. Pins, pins 9 to 11 of the 8-to-1 multiplexer U4 are connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U4 is connected to one end of capacitor C20 and a 5V voltage source, the other end of the capacitor C20 is grounded, pins 1, 2, 4 to 8, 12, and 15 of the 8-to-1 multiplexer U2 are grounded, pins 3, 9 to 11 of the 8-to-1 multiplexer U2 are respectively connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U2 is connected to one end of capacitor C21 and a 5V voltage source, the other end of the capacitor C21 is grounded;

[0007] The sub-control module includes a single-chip microcomputer U1-1, and pins 40 to 42 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multiplexer U3 and pins 11, 10, and 9 of the 8-to-1 multiplexer U4. Pins 43, 44, and 1 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multiplexer U2. Pin 2 of the single-chip microcomputer U1-1 is connected to one end of capacitor C2, one end of capacitor C3, and one end of resistor R2. The other end of resistor R2 is connected to pin 3 of the 8-to-1 multiplexer U2. The other end of capacitor C2 is connected to the other end of capacitor C3 and then grounded. Pins 11, 5, and 7 of the single-chip microcomputer U1-1 are respectively connected to the sub-control bus output module. Pin 29 of the single-chip microcomputer U1-1 is connected to a 5V voltage source. Pin 14 of the single-chip microcomputer U1-1 is connected to one end of the crystal oscillator Y1 and one end of the capacitor C4, pin 15 of the single-chip microcomputer U1-1 is connected to the other end of the crystal oscillator Y1 and one end of the capacitor C5, pin 4 of the single-chip microcomputer U1-1 is connected to one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is connected to the other end of the capacitor C5, the other end of the capacitor C4 and grounded, pin 38 of the single-chip microcomputer U1-1 is connected to one end of the capacitors C15 to C18, the other end of the capacitor C1 and connected to a 5V voltage source, the other ends of the capacitors C15 to C18 are connected and grounded, pin 16 of the single-chip microcomputer U1-1 is grounded, pin 28 of the single-chip microcomputer U1-1 is connected to one end of the resistor R27, the other end of the resistor R27 is connected to the cathode of the light-emitting diode LE4, and the anode of the light-emitting diode LE4 is connected to a 5V voltage source;

[0008] The sub-control bus output module includes a differential bus receiver U6, wherein pin 1 of the differential bus receiver U6 is connected to one end of a resistor R35, and the other end of the resistor R35 is connected to pin 3 of a potential coupler U7. Pins 1 and 6 of the potential coupler U7 are connected to a 5V voltage source, and pin 4 of the potential coupler U7 is grounded. Pin 5 of the potential coupler U7 is connected to pin 5 of the single-chip computer U1-1. Pins 2 and 3 of the differential bus receiver U6 are connected to the collector of the transistor Q1 and one end of the resistor R37. The base of the transistor Q1 is connected to one end of a resistor R36. The other end of the resistor R36 is connected to one end of a resistor R39 and the potential coupler U 8, the other end of the resistor R39 is connected to the emitter of the transistor Q1, the 6th pin of the potential coupler U8 and the 5V voltage source, the other end of the resistor R37 is connected to the 4th pin of the potential coupler U8, the 1st pin of the potential coupler U8 is connected to the 5V voltage source, the 3rd pin of the potential coupler U8 is connected to one end of the resistor R24, the other end of the resistor R24 ​​is connected to the 11th pin of the microcontroller U1-1, the 4th pin of the differential bus receiver U6 is connected to the pin of the potential coupler U9 and one end of the resistor R38, the 6th pin of the potential coupler U9 is connected to the other end of the resistor R38 and the 5V voltage source, the potential coupler Pin 4 of U9 is grounded, pin 1 of the potential coupler U9 is connected to a 5V voltage source, pin 3 of the potential coupler U9 is connected to one end of resistor R23, the other end of the resistor R23 is connected to pin 7 of the microcontroller U1-1, pin 5 of the differential bus receiver U6 is grounded, pin 6 of the differential bus receiver U6 is connected to one end of resistor R33, the other end of the resistor R33 is connected to one end of resistor R31, the negative electrode of the voltage regulator diode TVS3, and one end of the fuse F19, the other end of the resistor R31 is connected to a 5V voltage source, the positive electrode of the voltage regulator diode TVS3 is grounded, and the other end of the fuse F19 is connected to pin 1 of the transformer L7. Pin 7 of the differential bus receiver U6 is connected to one end of a resistor R32, the other end of the resistor R32 is connected to one end of a resistor R34, the cathode of a voltage-stabilizing diode TVS2, and one end of a fuse F20, the other end of the resistor R34 is grounded, the anode of the voltage-stabilizing diode TVS2 is grounded, the other end of the fuse F20 is connected to pin 3 of the transformer L7, pins 2 and 4 of the transformer L7 output bus signals 485A1OUT and 485B1OUT and are connected to the input end of the master control bus input module, pin 8 of the differential bus receiver U6 is connected to one end of a capacitor C24 and a 5V voltage source, and the other end of the capacitor C24 is grounded;

[0009] The main control module includes a single-chip microcomputer U1, pin 6 of the single-chip microcomputer U1 is connected to one end of the capacitor C1 and pin 1 of the common cathode dual-switch diode D1, pin 2 of the common cathode dual-switch diode D1 is connected to a 3.3V voltage source, pin 3 of the common cathode dual-switch diode D1 is connected to the positive electrode of the DC power supply BT1, the negative electrode of the DC power supply BT1 is connected to the other end of the capacitor C1 and grounded, pin 8 of the single-chip microcomputer U1 is connected to one end of the crystal oscillator Y2 and one end of the capacitor C2, pin 9 of the single-chip microcomputer U1 is connected to the other end of the crystal oscillator Y2 and one end of the capacitor C3, pin 12 of the single-chip microcomputer U1 is connected to one end of the capacitor C4 and one end of the crystal oscillator Y1, pin 13 of the single-chip microcomputer U1 is connected to one end of the capacitor C5 and the other end of the crystal oscillator Y1, and pin 14 of the single-chip microcomputer U1 is connected to one end of the resistor R1 and one end of the capacitor C6. Pins 21 and 22 of the single-chip microcomputer U1 are connected to each other and then connected to the other end of the resistor R1 and grounded. The other ends of the capacitors C2 to C6 are connected to each other and then grounded. Pins 10, 19, 20, 27, 49, 74, and 99 of the single-chip microcomputer U1 are grounded. Pins 10, 28, 50, 75, and 100 of the single-chip microcomputer U1 are connected to a 3.3V voltage source. Pins 23 to 26, 31, 32, 35, 36, 40, 42, 44, 45, 92, 93, 95, and 96 of the single-chip microcomputer U1 are connected to the multi-channel branch current analog output module. Pins 52, 68, and 69 of the single-chip microcomputer U1 are connected to the output end of the main control bus input module. Pins 89, 90, 97, and 98 of the single-chip microcomputer are connected to the multi-channel branch current analog output module. Pin 94 of the single-chip microcomputer U1 is grounded via resistor R2.

[0010] The master control bus input module includes a differential bus receiver 1U1, wherein pin 1 of the differential bus receiver 1U1 is connected to one end of a resistor 1R8, and the other end of the resistor 1R8 is connected to pin 3 of a potential coupler 1U5, wherein pin 1 of the potential coupler 1U5 is connected to a 5V voltage source, and pin 6 of the potential coupler 1U5 is connected to a 3.3V voltage source, and pin 4 of the potential coupler 1U5 is grounded, and pin 5 of the potential coupler 1U5 is connected to pin 69 of the microcontroller U1, and pins 2 and 3 of the differential bus receiver 1U1 are connected to the collector of a transistor 1Q1 and one end of a resistor 1R6, and the base of the transistor 1Q1 is connected to one end of a resistor 1R7, and the resistor 1R8 is connected to the base of the transistor 1Q1. The other end of the resistor 1R7 is connected to one end of the resistor 1R9 and pin 5 of the potential coupler 1U4. The other end of the resistor 1R9 is connected to the emitter of the transistor 1Q1, pin 6 of the potential coupler 1U4 and a 5V voltage source. The other end of the resistor 1R6 is connected to pin 4 of the potential coupler 1U4 and grounded. Pin 1 of the potential coupler 1U4 is connected to a 3.3V voltage source. Pin 3 of the potential coupler 1U4 is connected to one end of the resistor 1R11. The other end of the resistor 1R11 is connected to pin 52 of the microcontroller U1. Pin 4 of the differential bus receiver 1U1 is connected to a pin of the potential coupler 1U3 and one end of the resistor 1R5. The potential coupler 1U3 Pin 6 of the differential bus receiver 1U1 is connected to the other end of the resistor 1R5 and a 5V voltage source, pin 4 of the potential coupler 1U3 is grounded, pin 1 of the potential coupler 1U3 is connected to a 3.3V voltage source, pin 3 of the potential coupler 1U3 is connected to one end of the resistor 1R10, the other end of the resistor 1R10 is connected to pin 68 of the microcontroller U1, pin 5 of the differential bus receiver 1U1 is connected to one end of the resistor 1R1, the positive electrode of the Zener diode 1D3 and grounded, pin 7 of the differential bus receiver 1U1 is connected to one end of the resistor 1R3, the other end of the resistor 1R3 is connected to one end of the resistor 1R1, the negative electrode of the Zener diode 1D3 and one end of the fuse 1F2, The other end of the fuse 1F2 is connected to pin 3 of the transformer 1L1, pin 6 of the differential bus receiver 1U1 is connected to one end of the resistor 1R4, the other end of the resistor 1R4 is connected to one end of the resistor 1R2, the cathode of the Zener diode 1D1, and one end of the fuse 1F1, the anode of the Zener diode 1D1 is grounded, the other end of the fuse 1F1 is connected to pin 1 of the transformer 1L1, pins 2 and 4 of the transformer 1L1 are connected to the output bus signals 485A1OUT and 485B1OUT of the sub-control bus output module, pin 8 of the differential bus receiver 1U1 is connected to one end of the capacitor 1C1 and a 5V voltage source, and the other end of the capacitor 1C1 is grounded;

[0011] The multi-channel branch current analog output module includes a multi-channel branch voltage output module and a voltage-current conversion output module. The input end of the multi-channel branch voltage output module is connected to the output end of the main control module, and the output end of the multi-channel branch voltage output module is connected to the output end of the voltage-current conversion output module. The multi-channel output voltage signal of the multi-channel branch voltage output module is converted into a multi-channel current output signal through the voltage-current conversion output module. The multi-channel branch voltage output module includes latches U10 to U12. Pin 1 of the latch U10 is connected to one end of the resistor R6 and pin 89 of the microcontroller U1. The other end of the resistor R6 is connected to a 5V voltage source. Pin 11 of the latch U10 is connected to the 5V voltage source. , 20 pins are connected to a 5V voltage source, pins 5 to 7 of the latch U10 are connected to pins 90, 98, and 97 of the single-chip computer U1, pins 9 and 10 of the latch U10 are connected and then grounded, pin 12 of the latch U10 is connected to one end of the resistor R7, and the other end of the resistor R7 is grounded, pin 1 of the latch U11 is connected to one end of the resistor R11 and pin 16 of the latch U10, and the other end of the resistor R11 is connected to a 5V voltage source, pins 2 to 9 of the latch U11 are connected to pins 45, 44, 42, 40, 36, 35, 32, and 31 of the single-chip computer U1, pin 10 of the latch U11 is grounded, and pins 12 to 19 of the latch U11 are connected to one end of the resistor R11. The pins are connected to one end of the resistors R60, R62, R64, R66, R68, R70, R72, and R74 respectively, and the other ends of the resistors R60, R62, R64, R66, R68, R70, R72, and R74 are connected to one end of the capacitors C30, C32, C34, C36, C38, C40, C42, and C46 and the 40, 35, 30, 25, 20, 15, 10, and 5 pins of the cable holder X2 respectively. Pin 1 of the latch U12 is connected to pin 16 of the latch U10, pins 11 and 20 of the latch U12 are connected to a 5V voltage source, and pins 2 to 9 of the latch U12 are connected to pin 2 of the microcontroller U1. Pins 6, 23, 25, 24, 96, 95, 93, and 92, pin 10 of the latch U12 is grounded, pins 12 to 19 of the latch U12 are respectively connected to one end of resistors R75, R73, R71, R69, R67, R65, R63, and R61, and the other ends of the resistors R75, R73, R71, R69, R67, R65, R63, and R61 are respectively connected to one end of capacitors C45, C43, C41, C39, C37, C35, C33, and C31 and pins 2, 7, 12, 17, 22, 27, 32, and 37 of the cable holder X2, and pin 20 of the latch U12 is connected to a 5V voltage source;

[0012] The voltage-current conversion output module includes voltage-current converters U13 and U14. The circuit structures of the two voltage-current converters U13 and U14 are the same, and 2N (N is a positive number and does not exceed 4) of the voltage-current converters U13 and U14 are selected when in use. Pins 9 and 10 of the voltage-current converter U13 are connected to one end of the resistor R3 and one end of the resistor R2. The other end of the resistor R3 is connected to the other end of the resistor R2 and then connected to pin 7 of the voltage-current converter U13. Pin 6 of the voltage-current converter U13 is connected to one end of the capacitor C1 and one end of the resistor R1. The other end of the resistor R1 is connected to the voltage signal source DAQZx1 (x1 is an odd number) of the cable holder X2. Pin 1 of the voltage-current converter U13 is connected to the inductor One end of L1 and one end of capacitor C2, the other end of the inductor L1 is connected to a 24V voltage source, pin 2 of the voltage-to-current converter U13 is connected to one end of resistor R4 and the emitter of transistor Q1, the other end of the resistor R4 is connected to the base of the transistor Q1 and the source of the field-effect transistor Q2, pin 3 of the voltage-to-current converter U13 is connected to the collector of the transistor Q1 and the gate of the field-effect transistor Q2, the drain of the field-effect transistor Q2 is connected to one end of capacitor C3 and the positive electrode of diode D1, the negative electrode of diode D1 is connected to one end of resistor R5, the other end of resistor R5 is connected to the negative electrode of voltage-stabilizing diode TVS1 and outputs Ix1+ current signal source, the other end of the capacitor C3 is connected to the positive electrode of voltage-stabilizing diode TVS1 and outputs Ix1- current signal source;

[0013] It also includes a master bus output module, which is connected to pins 43, 86, and 87 of the microcontroller U1. The structure of the master bus output module is the same as the circuit structure of the master bus input module, and the bus signal can be output through the master bus output module.

[0014] After adopting the above structure, the signals of multiple detectors (up to 16 signal sources) are input into the sub-control module for data processing through the detector signal input module, and then sequentially input into the main control module through the sub-control bus output module and the main control bus input module for data processing. Finally, up to 16 current analog quantities are output through the multi-channel branch current analog output module for multi-point transmission. This not only has strong anti-interference ability during signal transmission and increased reliability, but also multiple outputs are transmitted to different destinations, making it more convenient to use and increasing applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a control principle diagram of the overall structure of the present invention;

[0016] Figure 2 This is a circuit schematic diagram of the signal detection points XIN1 to XIN16 of the present invention;

[0017] Figure 3 This is a circuit diagram of the 8-to-1 multi-way switch U3 of the present invention;

[0018] Figure 4 This is a circuit diagram of the 8-to-1 multiplexer U4 of the present invention;

[0019] Figure 5 This is a circuit diagram of the 8-to-1 multi-way switch U2 of the present invention;

[0020] Figure 6 This is a circuit schematic diagram of the power supply voltage of the signal detection points XIN1 to XIN16 of the present invention;

[0021] Figure 7 This is a circuit diagram of the single chip microcomputer U1-1 of the present invention;

[0022] Figure 8 1 is a circuit schematic diagram of the differential bus receiver U6 of the present invention;

[0023] Figure 9 This is a circuit schematic diagram of the single chip microcomputer U1 of the present invention;

[0024] Figure 10 1 is a circuit schematic diagram of a differential bus receiver 1U1 of the present invention;

[0025] Figure 11 1 is a circuit schematic diagram of the latch U10 of the present invention;

[0026] Figure 12 1 is a circuit schematic diagram of the latch U11 of the present invention;

[0027] Figure 13 1 is a circuit schematic diagram of the latch U12 of the present invention;

[0028] Figure 14 This is a circuit diagram of the cable tray X2 of the present invention;

[0029] Figure 15 This is a circuit diagram of the voltage-to-current converter U13 of the present invention;

[0030] Figure 16 This is a circuit diagram of the voltage-to-current converter U14 of the present invention;

[0031] Figure 17 This is a circuit diagram of the cable tray X3 of the present invention;

[0032] Figure 18 This is a circuit diagram of the master bus output module of the present invention;

[0033] Figure 19 This is a control flow chart of the present invention. DETAILED DESCRIPTION

[0034] like Figure 1 As shown, a combustible gas alarm controller with 16 analog branch outputs includes a main module and a detector input module connected to the main module. The detector input module includes a detector signal input module, a sub-control module, and a sub-control bus output module. The input end of the detector signal input module is connected to the output end of each sub-detector signal, the output end of the detector signal input module is connected to the input end of the sub-control module, and the output end of the sub-control module is connected to the input end of the sub-control bus output module.

[0035] The main module includes a main control bus input module, a main control module and a multi-channel branch current analog output module. The input end of the main control bus input module is connected to the output end of the branch bus output module, the output end of the main bus input module is connected to the input end of the main control module, and the output end of the main control module is connected to the input end of the multi-channel branch current analog output module. The 16-channel current analog output is transmitted to multiple points through the multi-channel branch current analog output module.

[0036] like Figures 2 to 5As shown, the detector signal input module is connected to the detector to obtain up to 16 detector detection signal points. Specifically, the detector signal input module includes XIN1 to XIN16 signal detection points connected to the output end of each detector. The XIN1 to XIN16 signal detection points are respectively connected to one end of the fuse F23 to F38, and the other ends of the fuses F23 to F38 are respectively connected to one end of the resistors R44 to R59. The other ends of the resistors R44 to R59 are connected to the ground. At the same time, the other ends of the resistors R44 to R59 are also respectively connected to the voltage regulator diode TVS7. To one end of TVS22, the other ends of the voltage regulator diodes TVS7 to TVS22 are connected to one end of the resistors R7 to R19 respectively, and the other ends of the resistors R7 to R19 output Y0 to Y15 signal sources respectively. The Y0 to Y7 signal sources are connected to the 13, 14, 15, 12, 1, 5, 2, and 4 pins of the 8-to-1 multiplexer U3 respectively. The 6 to 8 pins of the 8-to-1 multiplexer U3 are connected and then grounded. The 3 pin of the 8-to-1 multiplexer U3 is connected to the 8-to-1 multiplexer Pin 13 of U2 and pins 9 to 11 of the 8-to-1 multiplexer U3 are connected to the sub-control module. Pin 16 of the 8-to-1 multiplexer U3 is connected to one end of capacitor C19 and a 5V voltage source. The other end of capacitor C19 is grounded. Signal sources Y8 to Y15 are connected to pins 13, 14, 15, 12, 1, 5, 2, and 4 of the 8-to-1 multiplexer U4 respectively. Pins 6 to 8 of the 8-to-1 multiplexer U4 are connected and then grounded. Pin 3 of the 8-to-1 multiplexer U4 is connected to the 8-to-1 multiplexer U2. Pin 14 of the 8-to-1 multiplexer U4 is connected to the sub-control module, pins 9 to 11 of the 8-to-1 multiplexer U4 are connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U4 is connected to one end of capacitor C20 and a 5V voltage source, and the other end of capacitor C20 is grounded, pins 1, 2, 4 to 8, 12, and 15 of the 8-to-1 multiplexer U2 are grounded, pins 3, 9 to 11 of the 8-to-1 multiplexer U2 are respectively connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U2 is connected to one end of capacitor C21 and a 5V voltage source, and the other end of capacitor C21 is grounded.

[0037] like Figure 7As shown, the detector signal input module is connected to the sub-control module, and the sub-control module processes and analyzes the signal detection points collected by the detector signal input module. Specifically, the sub-control module includes a single-chip microcomputer U1-1, and pins 40 to 42 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multiplexer U3 and pins 11, 10, and 9 of the 8-to-1 multiplexer U4. Pins 43, 44, and 1 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multiplexer U2. Pin 2 of the single-chip microcomputer U1-1 is connected to one end of capacitor C2, one end of capacitor C3, and one end of resistor R2. The other end of resistor R2 is connected to pin 3 of the 8-to-1 multiplexer U2. The other end of capacitor C2 is connected to the other end of capacitor C3 and then grounded. Pins 11, 5, and 7 of the single-chip microcomputer U1-1 are respectively connected to the sub-control bus output module. Pin 29 of the single-chip microcomputer U1-1 is connected to a 5V voltage source. Pin 14 of the microcontroller U1-1 is connected to one end of the crystal oscillator Y1 and one end of the capacitor C4, pin 15 of the microcontroller U1-1 is connected to the other end of the crystal oscillator Y1 and one end of the capacitor C5, pin 4 of the microcontroller U1-1 is connected to one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is connected to the other end of the capacitor C5, the other end of the capacitor C4 and grounded, pin 38 of the microcontroller U1-1 is connected to one end of the capacitors C15 to C18, the other end of the capacitor C1 and a 5V voltage source, the other ends of the capacitors C15 to C18 are connected and grounded, pin 16 of the microcontroller U1-1 is grounded, pin 28 of the microcontroller U1-1 is connected to one end of the resistor R27, the other end of the resistor R27 is connected to the cathode of the light-emitting diode LE4, and the anode of the light-emitting diode LE4 is connected to a 5V voltage source.

[0038] like Figure 8As shown, after the sub-control module processes and analyzes the signal detection points collected by the detector signal input module, it generates a bus signal through the sub-control bus output module, and transmits the next step through the bus signal. Specifically, the sub-control bus output module includes a differential bus receiver U6, the 1st pin of the differential bus receiver U6 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to the 3rd pin of the potential coupler U7, the 1st and 6th pins of the potential coupler U7 are connected to a 5V voltage source, the 4th pin of the potential coupler U7 is grounded, the 5th pin of the potential coupler U7 is connected to the 5th pin of the microcontroller U1-1, the 2nd and 3rd pins of the differential bus receiver U6 are connected to the collector of the transistor Q1 and one end of the resistor R37, the base of the transistor Q1 is connected to one end of the resistor R36, the other end of the resistor R36 is connected to one end of the resistor R39, the Pin 5 of the potential coupler U8, the other end of the resistor R39 is connected to the emitter of the transistor Q1, pin 6 of the potential coupler U8 and a 5V voltage source, the other end of the resistor R37 is connected to pin 4 of the potential coupler U8, pin 1 of the potential coupler U8 is connected to a 5V voltage source, pin 3 of the potential coupler U8 is connected to one end of the resistor R24, the other end of the resistor R24 ​​is connected to pin 11 of the microcontroller U1-1, pin 4 of the differential bus receiver U6 is connected to a pin of the potential coupler U9 and one end of the resistor R38, pin 6 of the potential coupler U9 is connected to the other end of the resistor R38 and a 5V voltage source, the potential coupler U Pin 4 of 9 is grounded, pin 1 of the potential coupler U9 is connected to a 5V voltage source, pin 3 of the potential coupler U9 is connected to one end of the resistor R23, the other end of the resistor R23 is connected to pin 7 of the microcontroller U1-1, pin 5 of the differential bus receiver U6 is grounded, pin 6 of the differential bus receiver U6 is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the resistor R31, the cathode of the Zener diode TVS3, and one end of the fuse F19, the other end of the resistor R31 is connected to the 5V voltage source, the anode of the Zener diode TVS3 is grounded, and the other end of the fuse F19 is connected to pin 1 of the transformer L7. Pin 7 of the differential bus receiver U6 is connected to one end of the resistor R32, the other end of the resistor R32 is connected to one end of the resistor R34, the cathode of the Zener diode TVS2, and one end of the fuse F20, the other end of the resistor R34 is grounded, the anode of the Zener diode TVS2 is grounded, the other end of the fuse F20 is connected to pin 3 of the transformer L7, pins 2 and 4 of the transformer L7 output bus signals 485A1OUT and 485B1OUT and are connected to the input end of the master bus input module, pin 8 of the differential bus receiver U6 is connected to one end of the capacitor C24 and the 5V voltage source, and the other end of the capacitor C24 is grounded.

[0039] like Figure 9As shown, the main control module serves as the central processor of the main module, which is used to process and analyze the detection point signals of the detector input module and output multiplexed transmission signals to various destinations. Specifically, the main control module includes a single-chip microcomputer U1, pin 6 of the single-chip microcomputer U1 is connected to one end of the capacitor C1 and pin 1 of the common cathode dual-switch diode D1, pin 2 of the common cathode dual-switch diode D1 is connected to a 3.3V voltage source, pin 3 of the common cathode dual-switch diode D1 is connected to the positive electrode of the DC power supply BT1, the negative electrode of the DC power supply BT1 is connected to the other end of the capacitor C1 and grounded, pin 8 of the single-chip microcomputer U1 is connected to one end of the crystal oscillator Y2 and one end of the capacitor C2, pin 9 of the single-chip microcomputer U1 is connected to the other end of the crystal oscillator Y2 and one end of the capacitor C3, pin 12 of the single-chip microcomputer U1 is connected to one end of the capacitor C4 and one end of the crystal oscillator Y1, pin 13 of the single-chip microcomputer U1 is connected to one end of the capacitor C5 and the other end of the crystal oscillator Y1, and pin 14 of the single-chip microcomputer U1 is connected to one end of the resistor R1 and one end of the capacitor C6. Pins 21 and 22 of the microcontroller U1 are connected to each other and then connected to the other end of the resistor R1 and grounded. The other ends of the capacitors C2 to C6 are connected to each other and then grounded. Pins 10, 19, 20, 27, 49, 74, and 99 of the microcontroller U1 are grounded. Pins 10, 28, 50, 75, and 100 of the microcontroller U1 are connected to a 3.3V voltage source. Pins 23 to 26, 31, 32, 35, 36, 40, 42, 44, 45, 92, 93, 95, and 96 of the microcontroller U1 are connected to a multi-channel branch current analog output module. Pins 52, 68, and 69 of the microcontroller U1 are connected to the output end of the main control bus input module. Pins 89, 90, 97, and 98 of the microcontroller are connected to the multi-channel branch current analog output module. Pin 94 of the microcontroller U1 is grounded via resistor R2.

[0040] like Figure 10As shown, the bus signal of the main control module and the sub-control bus output module is connected to each other through the main control bus input module, and the bus signal is transmitted to the main control module. Specifically, the main control bus input module includes a differential bus receiver 1U1, pin 1 of the differential bus receiver 1U1 is connected to one end of the resistor 1R8, the other end of the resistor 1R8 is connected to pin 3 of the potential coupler 1U5, pin 1 of the potential coupler 1U5 is connected to a 5V voltage source, pin 6 of the potential coupler 1U5 is connected to a 3.3V voltage source, pin 4 of the potential coupler 1U5 is grounded, pin 5 of the potential coupler 1U5 is connected to pin 69 of the microcontroller U1, and pins 2 and 3 of the differential bus receiver 1U1 are connected Then connect the collector of transistor 1Q1 and one end of resistor 1R6, the base of transistor 1Q1 is connected to one end of resistor 1R7, the other end of resistor 1R7 is connected to one end of resistor 1R9 and pin 5 of potential coupler 1U4, the other end of resistor 1R9 is connected to the emitter of transistor 1Q1, pin 6 of potential coupler 1U4 and a 5V voltage source, the other end of resistor 1R6 is connected to pin 4 of potential coupler 1U4 and grounded, pin 1 of potential coupler 1U4 is connected to a 3.3V voltage source, pin 3 of potential coupler 1U4 is connected to one end of resistor 1R11, the other end of resistor 1R11 is connected to pin 52 of microcontroller U1, and pin 4 of differential bus receiver 1U1 is connected to the potential The pin of the coupler 1U3 and one end of the resistor 1R5 are connected. Pin 6 of the potential coupler 1U3 is connected to the other end of the resistor 1R5 and a 5V voltage source. Pin 4 of the potential coupler 1U3 is grounded. Pin 1 of the potential coupler 1U3 is connected to a 3.3V voltage source. Pin 3 of the potential coupler 1U3 is connected to one end of the resistor 1R10. The other end of the resistor 1R10 is connected to pin 68 of the microcontroller U1. Pin 5 of the differential bus receiver 1U1 is connected to one end of the resistor 1R1, the positive electrode of the Zener diode 1D3, and ground. Pin 7 of the differential bus receiver 1U1 is connected to one end of the resistor 1R3. The other end of the resistor 1R3 is connected to one end of the resistor 1R1 and the negative electrode of the Zener diode 1D3. , one end of the fuse 1F2, the other end of the fuse 1F2 is connected to pin 3 of the transformer 1L1, pin 6 of the differential bus receiver 1U1 is connected to one end of the resistor 1R4, the other end of the resistor 1R4 is connected to one end of the resistor 1R2, the cathode of the Zener diode 1D1, and one end of the fuse 1F1, the anode of the Zener diode 1D1 is grounded, the other end of the fuse 1F1 is connected to pin 1 of the transformer 1L1, pins 2 and 4 of the transformer 1L1 are connected to the output bus signals 485A1OUT and 485B1OUT of the sub-control bus output module, pin 8 of the differential bus receiver 1U1 is connected to one end of the capacitor 1C1 and the 5V voltage source, and the other end of the capacitor 1C1 is grounded.

[0041] The main control module and the multi-channel branch current analog output module transmit the output 16-channel current analog quantity to multiple points through the multi-channel branch current analog output module. Specifically, the multi-channel branch current analog output module includes a multi-channel branch voltage output module and a voltage-current conversion output module. The input end of the multi-channel branch voltage output module is connected to the output end of the main control module, and the output end of the multi-channel branch voltage output module is connected to the output end of the voltage-current conversion output module. The multi-channel output voltage signal of the multi-channel branch voltage output module is converted into a current output signal of up to 16 channels through the voltage-current conversion output module, and the current signal is transmitted to different destinations, thereby increasing the reliability and convenience of use. Figures 11 to 14 As shown, the multi-channel branch voltage output module includes latches U10 to U12, pin 1 of latch U10 is connected to one end of resistor R6 and pin 89 of microcontroller U1, the other end of resistor R6 is connected to a 5V voltage source, pins 11 and 20 of latch U10 are connected to a 5V voltage source, pins 5 to 7 of latch U10 are connected to pins 90, 98, and 97 of microcontroller U1, pins 9 and 10 of latch U10 are connected and then grounded, pin 12 of latch U10 is connected to one end of resistor R7, the other end of resistor R7 is grounded, and pin 1 of latch U11 is connected to resistor One end of R11 and pin 16 of latch U10, the other end of resistor R11 is connected to a 5V voltage source, pins 2 to 9 of latch U11 are connected to pins 45, 44, 42, 40, 36, 35, 32, and 31 of microcontroller U1, pin 10 of latch U11 is grounded, and pins 12 to 19 of latch U11 are connected to one end of resistors R60, R62, R64, R66, R68, R70, R72, and R74 respectively. The other end of the latch is connected to one end of the capacitors C30, C32, C34, C36, C38, C40, C42, C46 and the 40, 35, 30, 25, 20, 15, 10, 5 pins of the cable holder X2 respectively. The 1 pin of the latch U12 is connected to the 16 pin of the latch U10. The 11 and 20 pins of the latch U12 are connected to the 5V voltage source. The 2 to 9 pins of the latch U12 are connected to the 26, 23, 25, 24, 96, 95, 93, 92 pins of the microcontroller U1. The 10 pin of the latch U12 is grounded. Pins 12 to 19 of the device U12 are connected to one end of resistors R75, R73, R71, R69, R67, R65, R63, and R61 respectively. The other ends of the resistors R75, R73, R71, R69, R67, R65, R63, and R61 are connected to one end of capacitors C45, C43, C41, C39, C37, C35, C33, and C31 and pins 2, 7, 12, 17, 22, 27, 32, and 37 of the cable holder X2 respectively. Pin 20 of the latch U12 is connected to a 5V voltage source.

[0042] like Figure 15 As shown in Figure 16, the voltage-current conversion output module includes voltage-current converters U13 and U14. The circuit structures of the two voltage-current converters U13 and U14 are the same, and 2N (N is a positive number and does not exceed 4) of the voltage-current converters U13 and U14 are selected when in use. Specifically, the structure of the voltage-current converter U13 is described in detail. The 9th and 10th pins of the voltage-current converter U13 are connected to one end of the resistor R3 and one end of the resistor R2. The other end of the resistor R3 is connected to the other end of the resistor R2 and then connected to the 7th pin of the voltage-current converter U13. The 6th pin of the voltage-current converter U13 is connected to one end of the capacitor C1 and one end of the resistor R1. The other end of the resistor R1 is connected to the voltage signal source DAQZx1 (x1 is an odd number) of the cable holder X2. The 1st pin of the voltage-current converter U13 is connected to one end of the inductor L1 and one end of the capacitor C2. The other end of the inductor L1 is connected to a 24V voltage source. Pin 2 of the current converter U13 is connected to one end of the resistor R4 and the emitter of the transistor Q1, the other end of the resistor R4 is connected to the base of the transistor Q1 and the source of the field-effect transistor Q2, pin 3 of the voltage-current converter U13 is connected to the collector of the transistor Q1 and the gate of the field-effect transistor Q2, the drain of the field-effect transistor Q2 is connected to one end of the capacitor C3 and the anode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the cathode of the voltage-stabilizing diode TVS1 and outputs the Ix1+ current signal source, the other end of the capacitor C3 is connected to the anode of the voltage-stabilizing diode TVS1 and outputs the Ix1- current signal source.

[0043] like Figure 18 As shown, it further includes a main control bus output module connected to the main control module. The main control bus output module is connected to pins 43, 86, and 87 of the microcontroller U1. The structure of the main control bus output module is the same as the circuit structure of the main control bus input module. The bus signal can also be output through the main bus output module.

[0044] The working principle of the present invention is as follows:

[0045] The detector signal input module is connected to the detector to obtain up to 16 detector detection signal points. The detector signal input module is connected to the sub-control module. The sub-control module processes and analyzes the signal detection points collected by the detector signal input module. After the sub-control module processes and analyzes the signal detection points collected by the detector signal input module, the sub-control bus output module generates a bus signal. The bus signal is transmitted to the main control module through the main control bus input module. The main control module sends the processed and analyzed signal to the multi-channel branch voltage output module to output up to 16 voltages. The voltage-current conversion output module converts the multi-channel output voltage signals of the multi-channel branch voltage output module into up to 16 current output signals, and transmits the current signals to different destinations, thereby increasing the reliability and convenience of use. At the same time, a main control bus output module connected to the main control module is further added, and the bus signal can also be output through the main bus output module.

[0046] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by anyone familiar with the art within the technical scope disclosed by the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A combustible gas alarm controller with 16 analog outputs, comprising a main module, characterized in that: It also includes a detector input module connected to the main module, the detector input module includes a detector signal input module, a sub-control module, and a sub-control bus output module, the input end of the detector signal input module is connected to the output end of each sub-detector signal, the output end of the detector signal input module is connected to the input end of the sub-control module, and the output end of the sub-control module is connected to the input end of the sub-control bus output module; The main module includes a main control bus input module, a main control module and a multi-channel branch current analog output module. The input end of the main control bus input module is connected to the output end of the branch bus output module, the output end of the main control bus input module is connected to the input end of the main control module, and the output end of the main control module is connected to the input end of the multi-channel branch current analog output module. The multi-channel branch current analog output module outputs 16 channels of current analog quantity for multi-point transmission; the main control module includes a single-chip microcomputer U1, and the single-chip microcomputer U1 The 6th pin of the single-chip microcomputer U1 is connected to one end of the capacitor C1 and the 1st pin of the common cathode dual switch diode D1, the 2nd pin of the common cathode dual switch diode D1 is connected to a 3.3V voltage source, the 3rd pin of the common cathode dual switch diode D1 is connected to the positive electrode of the DC power supply BT1, the negative electrode of the DC power supply BT1 is connected to the other end of the capacitor C1 and grounded, the 8th pin of the single-chip microcomputer U1 is connected to one end of the crystal oscillator Y2 and one end of the capacitor C2, the 9th pin of the single-chip microcomputer U1 is connected to the other end of the crystal oscillator Y2 and one end of the capacitor C3, the 12th pin of the single-chip microcomputer U ...3, the 12th pin of the single-chip microcomputer U1 is connected to the positive electrode of the DC power supply BT1, the negative electrode of the DC power supply BT1 is connected to the other end of the capacitor C1 and grounded, the 8th pin of the single-chip microcomputer U1 is connected to one end of the crystal oscillator Y2 and The pin 13 of the single-chip microcomputer U1 is connected to one end of the capacitor C4 and one end of the crystal oscillator Y1, the pin 14 of the single-chip microcomputer U1 is connected to one end of the resistor R1 and one end of the capacitor C6, the pins 21 and 22 of the single-chip microcomputer U1 are connected and then connected to the other end of the resistor R1 and grounded, the other ends of the capacitors C2 to C6 are connected and then grounded, the pins 10, 19, 20, 27, 49, 74, and 99 of the single-chip microcomputer U1 are grounded, and the pins 10, 28, and 50 of the single-chip microcomputer U1 are connected. , 75, and 100 pins are connected to a 3.3V voltage source, pins 23 to 26, 31, 32, 35, 36, 40, 42, 44, 45, 92, 93, 95, and 96 of the single-chip microcomputer U1 are connected to the multi-way branch current analog output module, pins 52, 68, and 69 of the single-chip microcomputer U1 are connected to the output end of the main control bus input module, pins 89, 90, 97, and 98 of the single-chip microcomputer are connected to the multi-way branch current analog output module, and pin 94 of the single-chip microcomputer U1 is grounded via resistor R2.

2. A combustible gas alarm controller with 16 analog outputs according to claim 1, characterized in that: The detector signal input module includes XIN1 to XIN16 signal detection points connected to the output ends of each detector, and the XIN1 to XIN16 signal detection points are respectively connected to one end of fuses F23 to F38 in a one-to-one correspondence, and the other ends of the fuses F23 to F38 are respectively connected to one end of resistors R44 to R59 in a one-to-one correspondence, and the other ends of the resistors R44 to R59 are connected to ground after being connected, and at the same time, the other ends of the resistors R44 to R59 are also respectively connected to voltage stabilizing diodes TVS7 to TVS The first terminal of the 8-to-1 multiplexer U3 is connected to one end of the 8-to-1 multiplexer U3, and the other ends of the voltage zener diodes TVS7 to TVS22 are connected to one end of the resistors R7 to R19 respectively. The other ends of the resistors R7 to R19 output Y0 to Y15 signal sources respectively. The Y0 to Y7 signal sources are connected to the 13th, 14th, 15th, 12th, 1st, 5th, 2nd, and 4th pins of the 8-to-1 multiplexer U3 respectively. The 6th to 8th pins of the 8-to-1 multiplexer U3 are connected to the ground, and the 3rd pin of the 8-to-1 multiplexer U3 is connected to the 13th pin of the 8-to-1 multiplexer U2. , pins 9 to 11 of the 8-to-1 multiplexer U3 are connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U3 is connected to one end of capacitor C19 and a 5V voltage source, and the other end of capacitor C19 is grounded, and the signal sources Y8 to Y15 are connected to pins 13, 14, 15, 12, 1, 5, 2, and 4 of the 8-to-1 multiplexer U4 respectively, pins 6 to 8 of the 8-to-1 multiplexer U4 are connected and then grounded, and pin 3 of the 8-to-1 multiplexer U4 is connected to pin 14 of the 8-to-1 multiplexer U2 , pins 9 to 11 of the 8-to-1 multiplexer U4 are connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U4 is connected to one end of capacitor C20 and a 5V voltage source, the other end of the capacitor C20 is grounded, pins 1, 2, 4 to 8, 12, and 15 of the 8-to-1 multiplexer U2 are grounded, pins 3, 9 to 11 of the 8-to-1 multiplexer U2 are respectively connected to the sub-control module, pin 16 of the 8-to-1 multiplexer U2 is connected to one end of capacitor C21 and a 5V voltage source, and the other end of the capacitor C21 is grounded.

3. A combustible gas alarm controller with 16 analog outputs according to claim 2, characterized in that: The sub-control module includes a single-chip microcomputer U1-1, and pins 40 to 42 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multi-way switch U3 and pins 11, 10, and 9 of the 8-to-1 multi-way switch U4 in a one-to-one correspondence, and pins 43, 44, and 1 of the single-chip microcomputer U1-1 are respectively connected to pins 11, 10, and 9 of the 8-to-1 multi-way switch U2 in a one-to-one correspondence, and pin 2 of the single-chip microcomputer U1-1 is connected to one end of a capacitor C2, one end of a capacitor C3, and one end of a resistor R2, and the other end of the resistor R2 is connected to pin 3 of the 8-to-1 multi-way switch U2, and the other end of the capacitor C2 is connected to the other end of the capacitor C3 and then grounded, and pins 11, 5, and 7 of the single-chip microcomputer U1-1 are respectively connected to the sub-control bus output module, and pin 29 of the single-chip microcomputer U1-1 is connected to a 5V voltage source. Pin 14 of the single-chip microcomputer U1-1 is connected to one end of the crystal oscillator Y1 and one end of the capacitor C4, pin 15 of the single-chip microcomputer U1-1 is connected to the other end of the crystal oscillator Y1 and one end of the capacitor C5, pin 4 of the single-chip microcomputer U1-1 is connected to one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is connected to the other end of the capacitor C5, the other end of the capacitor C4 and grounded, pin 38 of the single-chip microcomputer U1-1 is connected to one end of the capacitors C15 to C18, the other end of the capacitor C1 and connected to a 5V voltage source, the other ends of the capacitors C15 to C18 are connected and grounded, pin 16 of the single-chip microcomputer U1-1 is grounded, pin 28 of the single-chip microcomputer U1-1 is connected to one end of the resistor R27, the other end of the resistor R27 is connected to the cathode of the light-emitting diode LE4, and the anode of the light-emitting diode LE4 is connected to a 5V voltage source.

4. A combustible gas alarm controller with 16 analog outputs according to claim 1, characterized in that: The sub-control bus output module includes a differential bus receiver U6, wherein pin 1 of the differential bus receiver U6 is connected to one end of a resistor R35, and the other end of the resistor R35 is connected to pin 3 of a potential coupler U7, pins 1 and 6 of the potential coupler U7 are connected to a 5V voltage source, pin 4 of the potential coupler U7 is grounded, and pin 5 of the potential coupler U7 is connected to pin 5 of the single-chip computer U1-1, and pins 2 and 3 of the differential bus receiver U6 are connected to the collector of the transistor Q1 and one end of the resistor R37, and the base of the transistor Q1 is connected to one end of a resistor R36, and the other end of the resistor R36 is connected to one end of a resistor R39 and the potential coupler U 8, the other end of the resistor R39 is connected to the emitter of the transistor Q1, the 6th pin of the potential coupler U8 and the 5V voltage source, the other end of the resistor R37 is connected to the 4th pin of the potential coupler U8, the 1st pin of the potential coupler U8 is connected to the 5V voltage source, the 3rd pin of the potential coupler U8 is connected to one end of the resistor R24, the other end of the resistor R24 ​​is connected to the 11th pin of the microcontroller U1-1, the 4th pin of the differential bus receiver U6 is connected to the pin of the potential coupler U9 and one end of the resistor R38, the 6th pin of the potential coupler U9 is connected to the other end of the resistor R38 and the 5V voltage source, the potential coupler Pin 4 of U9 is grounded, pin 1 of the potential coupler U9 is connected to a 5V voltage source, pin 3 of the potential coupler U9 is connected to one end of resistor R23, the other end of the resistor R23 is connected to pin 7 of the microcontroller U1-1, pin 5 of the differential bus receiver U6 is grounded, pin 6 of the differential bus receiver U6 is connected to one end of resistor R33, the other end of the resistor R33 is connected to one end of resistor R31, the cathode of the voltage stabilizing diode TVS3, and one end of the fuse F19, the other end of the resistor R31 is connected to a 5V voltage source, the anode of the voltage stabilizing diode TVS3 is grounded, and the other end of the fuse F19 is connected to pin 1 of the transformer L7. Pin 7 of the differential bus receiver U6 is connected to one end of a resistor R32, the other end of the resistor R32 is connected to one end of a resistor R34, the cathode of a voltage zener diode TVS2, and one end of a fuse F20, the other end of the resistor R34 is grounded, the anode of the voltage zener diode TVS2 is grounded, the other end of the fuse F20 is connected to pin 3 of the transformer L7, pins 2 and 4 of the transformer L7 output bus signals 485A1OUT and 485B1OUT and are connected to the input end of the main control bus input module, pin 8 of the differential bus receiver U6 is connected to one end of a capacitor C24 and a 5V voltage source, and the other end of the capacitor C24 is grounded.

5. A combustible gas alarm controller with 16 analog outputs according to claim 1, characterized in that: The master control bus input module includes a differential bus receiver 1U1, wherein pin 1 of the differential bus receiver 1U1 is connected to one end of a resistor 1R8, and the other end of the resistor 1R8 is connected to pin 3 of a potential coupler 1U5, wherein pin 1 of the potential coupler 1U5 is connected to a 5V voltage source, and pin 6 of the potential coupler 1U5 is connected to a 3.3V voltage source, and pin 4 of the potential coupler 1U5 is grounded, and pin 5 of the potential coupler 1U5 is connected to pin 69 of the single-chip computer U1, and pins 2 and 3 of the differential bus receiver 1U1 are connected to the collector of a transistor 1Q1 and one end of a resistor 1R6, and the base of the transistor 1Q1 is connected to one end of a resistor 1R7, and the resistor 1R8 is connected to the collector of the transistor 1Q1. The other end of the resistor 1R7 is connected to one end of the resistor 1R9 and the 5th pin of the potential coupler 1U4. The other end of the resistor 1R9 is connected to the emitter of the transistor 1Q1, the 6th pin of the potential coupler 1U4 and a 5V voltage source. The other end of the resistor 1R6 is connected to the 4th pin of the potential coupler 1U4 and is grounded. The 1st pin of the potential coupler 1U4 is connected to a 3.3V voltage source. The 3rd pin of the potential coupler 1U4 is connected to one end of the resistor 1R11. The other end of the resistor 1R11 is connected to the 52nd pin of the single-chip computer U1. The 4th pin of the differential bus receiver 1U1 is connected to the pin of the potential coupler 1U3 and one end of the resistor 1R5. The potential coupler 1U3 The 6th pin of the differential bus receiver 1U1 is connected to the other end of the resistor 1R5 and a 5V voltage source, the 4th pin of the potential coupler 1U3 is grounded, the 1st pin of the potential coupler 1U3 is connected to a 3.3V voltage source, the 3rd pin of the potential coupler 1U3 is connected to one end of the resistor 1R10, the other end of the resistor 1R10 is connected to the 68th pin of the microcontroller U1, the 5th pin of the differential bus receiver 1U1 is connected to one end of the resistor 1R1, the positive electrode of the Zener diode 1D3 and grounded, the 7th pin of the differential bus receiver 1U1 is connected to one end of the resistor 1R3, the other end of the resistor 1R3 is connected to one end of the resistor 1R1, the negative electrode of the Zener diode 1D3 and one end of the fuse 1F2, and the The other end of the fuse 1F2 is connected to pin 3 of the transformer 1L1, pin 6 of the differential bus receiver 1U1 is connected to one end of the resistor 1R4, the other end of the resistor 1R4 is connected to one end of the resistor 1R2, the cathode of the Zener diode 1D1, and one end of the fuse 1F1, the anode of the Zener diode 1D1 is grounded, the other end of the fuse 1F1 is connected to pin 1 of the transformer 1L1, pins 2 and 4 of the transformer 1L1 are connected to the output bus signals 485A1OUT and 485B1OUT of the sub-control bus output module, pin 8 of the differential bus receiver 1U1 is connected to one end of the capacitor 1C1 and a 5V voltage source, and the other end of the capacitor 1C1 is grounded.

6. A combustible gas alarm controller with 16 analog outputs according to claim 1, characterized in that: The multi-way branch current analog output module includes a multi-way branch voltage output module and a voltage-current conversion output module. The input end of the multi-way branch voltage output module is connected to the output end of the main control module, and the output end of the multi-way branch voltage output module is connected to the output end of the voltage-current conversion output module. The multi-way output voltage signal of the multi-way branch voltage output module is converted into a multi-way current output signal through the voltage-current conversion output module. The multi-way branch voltage output module includes latches U10 to U12. Pin 1 of the latch U10 is connected to one end of the resistor R6 and pin 89 of the single-chip computer U1. The other end of the resistor R6 is connected to a 5V voltage source. Pins 11 and 20 are connected to a 5V voltage source, pins 5 to 7 of the latch U10 are connected to pins 90, 98, and 97 of the single-chip computer U1, pins 9 and 10 of the latch U10 are connected and then grounded, pin 12 of the latch U10 is connected to one end of resistor R7, and the other end of the resistor R7 is grounded, pin 1 of the latch U11 is connected to one end of resistor R11 and pin 16 of the latch U10, and the other end of the resistor R11 is connected to a 5V voltage source, pins 2 to 9 of the latch U11 are connected to pins 45, 44, 42, 40, 36, 35, 32, and 31 of the single-chip computer U1, pin 10 of the latch U11 is grounded, and pins 12 to 19 of the latch U11 are connected to the 5V voltage source. The pins are connected to one end of the resistors R60, R62, R64, R66, R68, R70, R72, and R74 respectively, and the other ends of the resistors R60, R62, R64, R66, R68, R70, R72, and R74 are connected to one end of the capacitors C30, C32, C34, C36, C38, C40, C42, and C46 and the 40, 35, 30, 25, 20, 15, 10, and 5 pins of the cable holder X2 respectively, and the 1 pin of the latch U12 is connected to the 16 pin of the latch U10, the 11 and 20 pins of the latch U12 are connected to the 5V voltage source, and the 2 to 9 pins of the latch U12 are connected to the 26, Pins 23, 25, 24, 96, 95, 93, and 92, pin 10 of the latch U12 is grounded, pins 12 to 19 of the latch U12 are respectively connected to one end of resistors R75, R73, R71, R69, R67, R65, R63, and R61, and the other ends of the resistors R75, R73, R71, R69, R67, R65, R63, and R61 are respectively connected to one end of capacitors C45, C43, C41, C39, C37, C35, C33, and C31 and pins 2, 7, 12, 17, 22, 27, 32, and 37 of the cable holder X2, and pin 20 of the latch U12 is connected to a 5V voltage source.

7. A combustible gas alarm controller with 16 analog outputs according to claim 6, characterized in that: The voltage-current conversion output module includes voltage-current converters U13 and U14. The circuit structures of the two voltage-current converters U13 and U14 are the same, and 2N (N is a positive number and does not exceed 4) of the voltage-current converters U13 and U14 are selected when used. Pins 9 and 10 of the voltage-current converter U13 are connected to one end of a resistor R3 and one end of a resistor R2, and the other end of the resistor R3 is connected to the other end of the resistor R2 and then connected to pin 7 of the voltage-current converter U13. Pin 6 of the voltage-current converter U13 is connected to one end of a capacitor C1 and one end of a resistor R1. The other end of the resistor R1 is connected to the voltage signal source DAQZx1 (x1 is an odd number) of the cable holder X2. Pin 1 of the voltage-current converter U13 is connected to the inductor L1, one end of the capacitor C2, the other end of the inductor L1 is connected to a 24V voltage source, the 2nd pin of the voltage-to-current converter U13 is connected to one end of the resistor R4 and the emitter of the transistor Q1, the other end of the resistor R4 is connected to the base of the transistor Q1 and the source of the field effect transistor Q2, the 3rd pin of the voltage-to-current converter U13 is connected to the collector of the transistor Q1 and the gate of the field effect transistor Q2, the drain of the field effect transistor Q2 is connected to one end of the capacitor C3 and the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the negative electrode of the voltage stabilizing diode TVS1 and outputs the Ix1+ current signal source, the other end of the capacitor C3 is connected to the positive electrode of the voltage stabilizing diode TVS1 and outputs the Ix1- current signal source.

8. A combustible gas alarm controller with 16 analog outputs according to claim 1, characterized in that: It also includes a main control bus output module, which is connected to pins 43, 86, and 87 of the single-chip computer U1. The structure of the main control bus output module is the same as the circuit structure of the main control bus input module, and the bus signal can be output through the main control bus output module.

Images