CN209842839U - BB-6 type gas alarm controller - Google Patents
BB-6 type gas alarm controller Download PDFInfo
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- CN209842839U CN209842839U CN201821642192.6U CN201821642192U CN209842839U CN 209842839 U CN209842839 U CN 209842839U CN 201821642192 U CN201821642192 U CN 201821642192U CN 209842839 U CN209842839 U CN 209842839U
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Abstract
BB-6 type gas alarm controller is an instrument for centralized display control of information of gas detection alarm device in detection of explosive and explosive industrial field; the keyboard is characterized by consisting of a channel plate, a key board, a terminal board mother board and a power management board, and the structure is in a disc type and can be arranged on a wall-mounted machine, a musical instrument stand and a vertical cabinet; the BB-6 type gas alarm controller provides 24V voltage for the detector, the detector detects gas sampling, the 4-20 mA signal converted is input into the BB-6 type gas alarm controller, the BB-6 type gas alarm controller is processed by an LPC11C14 single chip microcomputer system, the signal is displayed through liquid crystal, and the signal is converted into a CAN bus, a standard MODBUS protocol and a current loop which are different in type and transmitted.
Description
Technical Field
BB-6 type gas alarm controller is an instrument for centralized display control of information of combustible gas detection alarm device in detection of explosive and explosive industrial site.
Background
When the gas concentration in the ambient air reaches or exceeds the preset alarm set value, the controller immediately sends out an optical alarm signal and an acoustic alarm signal corresponding to the road number so as to remind people to take safety measures as soon as possible, prevent the occurrence of fire explosion accidents and poisoning accidents and further achieve the effect of ensuring safe production. Therefore, the device is widely applicable to industrial production sites of petroleum, chemical industry, metallurgy and the like and storage, transportation and canning systems of oil products, liquefied gas and the like. The controller is an essential instrument for monitoring safety production.
Therefore, according to the mandatory national standard GB16808-2008 combustible gas alarm controller released by the ministry of public Security, a gas alarm controller conforming to the new standard is developed. It has wide application prospect.
SUMMERY OF THE UTILITY MODEL
The BB-6 type gas alarm controller is characterized by consisting of a channel board, a key board, a terminal board mother board and a power management board, has a disc-mounted structure and can be mounted on a wall-mounted machine, a musical instrument stand and a vertical cabinet; the BB-6 type gas alarm controller provides 24V voltage for the detector, the detector detects gas sampling, the 4-20 mA signal converted is input into the BB-6 type gas alarm controller, the BB-6 type gas alarm controller is processed by an LPC11C14 single chip microcomputer system, the signal is displayed through liquid crystal, and the signal is converted into a CAN bus, a standard MODBUS protocol and a current loop which are different in type and transmitted.
The utility model aims at providing an appearance is pleasing to the eye, the function is complete, high reliability, multiform output, accord with national fire standard's instrument technical scheme.
The technical scheme of the utility model is that: the BB-6 type gas alarm controller is specially designed for industrial places, can be connected with a plurality of paths of combustible gas detectors, and can simultaneously display the gas concentration of the area where the plurality of paths of detectors are located, when the gas concentration of any protected area exceeds a set alarm threshold, the controller can send out corresponding sound and light alarm signals to indicate the alarm area and the concentration during alarm, and continuously monitor the gas concentration dynamic state of the alarm area.
The utility model discloses constitute by channel board, keypad, terminal block mother board, power management board, the structure is the dish dress formula, can install on wall-hung machine, musical instrument platform and the clothes closet.
1. A channel plate: the management and display of the loop detector 1 are realized; judging and displaying the state of power management; key operation and state display; communication management, namely 1 path of CAN bus and 1 path of RS485 bus; alarm relay control and alarm sound drive. Communication interface and anti-interference design; outputting a relay; a 24V-to-5V switching power supply; and (5) controlling alarm sound. Connecting a current loop interface detector; a subscriber terminal is provided.
A 32-bit industrial CPU is used as a data processing and control unit, a model number LPC11C14 is a 32-bit industrial singlechip of an M3 kernel of Philips, an online programming function CAN be realized, the debugging and the field maintenance of products are convenient, and 24Kflash, 8Kram, a 1-path CAN bus and a 1-path serial port are integrated in the singlechip; the resource is rich, the running speed is high, and the processing of various data of the controller can be completely coped with.
In order to ensure the normal operation of the controller, a watchdog circuit NE555 is extended outside the CPU, the CPU performs a dog feeding operation in a timer interrupt mode, and when the single chip microcomputer is in a dead halt state or a program flies, the watchdog circuit can reset the CPU.
The detector power supply outputs a sampling controlled current-limiting mode to output, the limiting current is 860mA/24Vdc, the detector can be matched with various combustible gas detectors, when the output is short-circuited, a current-limiting circuit immediately carries out current-limiting protection, the CPU monitors the reduction of output voltage and the overlarge current, and the controlled active output can be closed and the fault type can be detected;
the current loop of the detector is input with a sampling current-limiting protection input mode, the limiting current is about 30mA, the current loop data sampling circuit uses a precision resistor to perform current-voltage conversion, a conventional operational amplifier is used for performing operational processing, and an A/D conversion input port of a CPU performs voltage sampling; when the input end of the current loop and the power supply of the detector are in a short circuit of 24V, the current limiting circuit acts to limit current, the interface of the controller is ensured not to be burnt out, and meanwhile, when the input end of the current loop and the 24V are in a short circuit, the CPU detects the short circuit and reports a fault to the short circuit.
Because the working site environment of the controller is severe, various interferences in the use environment can affect the controller, the anti-interference capability of the communication bus needs to be considered from the design, and the inductor, the TVS and the capacitor are reasonably used for anti-interference treatment; considering the convenience of field connection, the communication bus of the controller is required to be provided with 1 RS485 communication bus and 1 CAN communication bus.
And a real-time clock externally connected with a standby battery and a clock crystal oscillator, wherein the power consumption of the standby battery is very low, and the external clock crystal oscillator is 32768 Hz.
And 2M bytes of external SPI Flash are expanded, about 10000 event records can be stored, and the requirement of national standard is met.
And one path of controlled 24V output with current limiting 800mA protection, 2 groups of relay dry contact outputs and two paths of alarm relays are provided, and the contact power is 3A/30 Vdc.
The alarm horn has a sound alarm function, can emit 3 different alarm sounds by utilizing a single chip microcomputer PWM analog sound and a medium-low power NPN triode, uses a piezoelectric ceramic buzzer, and meets the national standard requirements on sound type and decibel quantity.
The detector and the detector are communicated in a linear 4-20 mA current loop mode, so that the adaptability and the reliability of a product are improved; and 1 path of 4-20 mA current loop output is designed for each loop, so that a user can conveniently connect other upper computers.
The loop card uses a distributed 24V to 5V switching power supply to supply power, the chip is LM33063, the switching frequency is 100KHz, the conversion efficiency is 90 percent, the output current is 1A/5V,
the power consumption of the product is reduced, and the reliability of the product is improved.
2. Power management, namely, realizing the management of main and standby electricity; charging control is carried out on the standby power; and the channel board exchanges power management information.
The power requirement of the switching power supply is 3.7A/27V, the input voltage is AC220V plus 10 percent minus 15 percent, and the requirement meets the national standard requirement.
To ensure the EMI and EMC of the switching power supply meet the national standard requirements, common mode and differential mode interference suppression must be designed at the power input, and a residual current leakage loop is required.
The charging circuit charges the standby power in a current-limiting pulse charging mode, the pulse control is generated by using a single chip microcomputer, the limiting current is set according to 20% of the number of the standby capacitors, the charging current is designed to be adjustable, for example, the standby power with 5AH, and the maximum charging current is 1A; charging fault, standby power undervoltage and main power fault alarm functions must be designed in the management unit; when the standby power supply can not meet the working condition of the controller, the switching power supply is required to carry out sound alarm control, and the sound alarm time exceeds 1H.
The design circuit of the utility model uses CMOS devices, which has the characteristic of low power consumption; the AC220V is provided with a 16-path detector state, the power consumption is about 60W, and the power consumption is 80W in a full alarm state; the rated power of the switching power supply is 3.7A/27V and 100W, and the power supply capacity is enough to meet the design requirement.
The utility model has the advantages that: the used electrical elements are highly integrated, auxiliary components are reduced, and the device is simple in structure, convenient to operate and easy to maintain.
Drawings
FIG. 1 is a schematic block diagram of the overall circuit of the present invention;
FIG. 2 is a schematic block diagram of the liquid crystal display circuit of the present invention;
FIG. 3 is a schematic block diagram of a Can communication circuit of the present invention;
FIG. 4 is a schematic block diagram of a Modbus communication circuit according to the present invention;
FIG. 5 is a schematic block diagram of the high-voltage to low-voltage circuit of the present invention;
fig. 6 is a schematic block diagram of the voltage conversion circuit of the present invention;
fig. 7 is a schematic block diagram of the clock circuit of the present invention;
FIG. 8 is a schematic block diagram of the key buzzer circuit of the present invention;
FIG. 9 is a schematic block diagram of the alarm buzzer circuit of the present invention;
FIG. 10 is a schematic circuit diagram of the single-chip microcomputer system of the present invention;
FIG. 11 is a schematic block diagram of a dog feeding circuit of the present invention;
fig. 12 is a schematic block diagram of a power supply circuit of the detector of the present invention;
fig. 13 is a schematic block diagram of the current loop input interface circuit of the present invention;
fig. 14 is a schematic block diagram of the current loop output circuit of the present invention;
FIG. 15 is a schematic block diagram of the anti-interference circuit of the present invention;
fig. 16 is a schematic block diagram of the relay control circuit of the present invention.
Detailed Description
The specific implementation manner of the present invention is as shown in the figure:
the utility model aims at providing an appearance is pleasing to the eye, the function is complete, high reliability, multiform output, accord with national fire standard's instrument technical scheme.
The technical scheme of the utility model is that: the BB-6 type gas alarm controller is specially designed for industrial places, can be connected with a plurality of paths of combustible gas detectors, and can simultaneously display the gas concentration of the area where the plurality of paths of detectors are located, when the gas concentration of any protected area exceeds a set alarm threshold, the controller can send out corresponding sound and light alarm signals to indicate the alarm area and the concentration during alarm, and continuously monitor the gas concentration dynamic state of the alarm area.
The controller consists of a channel board, a key board, a terminal board mother board and a power management board, has a disc-mounted structure, and can be mounted on a wall-mounted machine, a musical instrument stand and a vertical cabinet.
1. A channel plate: the management and display of the loop detector 1 are realized; judging and displaying the state of power management; key operation and state display; communication management, namely 1 path of CAN bus and 1 path of RS485 bus; alarm relay control and alarm sound drive. Communication interface and anti-interference design; outputting a relay; a 24V-to-5V switching power supply; and (5) controlling alarm sound. Connecting a current loop interface detector; a subscriber terminal is provided.
A 32-bit industrial CPU is used as a data processing and control unit, a model number LPC11C14 is a 32-bit industrial singlechip of an M3 kernel of Philips, an online programming function CAN be realized, the debugging and the field maintenance of products are convenient, and 24Kflash, 8Kram, a 1-path CAN bus and a 1-path serial port are integrated in the singlechip; the resource is rich, the running speed is high, and the processing of various data of the controller can be completely coped with.
In order to ensure the normal operation of the controller, a watchdog circuit NE555 is extended outside the CPU, the CPU performs a dog feeding operation in a timer interrupt mode, and when the single chip microcomputer is in a dead halt state or a program flies, the watchdog circuit can reset the CPU.
The detector power supply outputs a sampling controlled current-limiting mode to output, the limiting current is 860mA/24Vdc, the detector can be matched with various combustible gas detectors, when the output is short-circuited, a current-limiting circuit immediately carries out current-limiting protection, the CPU monitors the reduction of output voltage and the overlarge current, and the controlled active output can be closed and the fault type can be detected;
the current loop of the detector is input with a sampling current-limiting protection input mode, the limiting current is about 30mA, the current loop data sampling circuit uses a precision resistor to perform current-voltage conversion, a conventional operational amplifier is used for performing operational processing, and an A/D conversion input port of a CPU performs voltage sampling; when the input end of the current loop and the power supply of the detector are in a short circuit of 24V, the current limiting circuit acts to limit current, the interface of the controller is ensured not to be burnt out, and meanwhile, when the input end of the current loop and the 24V are in a short circuit, the CPU detects the short circuit and reports a fault to the short circuit.
Because the working site environment of the controller is severe, various interferences in the use environment can affect the controller, the anti-interference capability of the communication bus needs to be considered from the design, and the inductor, the TVS and the capacitor are reasonably used for anti-interference treatment; considering the convenience of field connection, the communication bus of the controller is required to be provided with 1 RS485 communication bus and 1 CAN communication bus.
And a real-time clock externally connected with a standby battery and a clock crystal oscillator, wherein the power consumption of the standby battery is very low, and the external clock crystal oscillator is 32768 Hz.
And 2M bytes of external SPI Flash are expanded, about 10000 event records can be stored, and the requirement of national standard is met.
And one path of controlled 24V output with current limiting 800mA protection, 2 groups of relay dry contact outputs and two paths of alarm relays are provided, and the contact power is 3A/30 Vdc.
The alarm horn has a sound alarm function, can emit 3 different alarm sounds by utilizing a single chip microcomputer PWM analog sound and a medium-low power NPN triode, uses a piezoelectric ceramic buzzer, and meets the national standard requirements on sound type and decibel quantity.
The detector and the detector are communicated in a linear 4-20 mA current loop mode, so that the adaptability and the reliability of a product are improved; and 1 path of 4-20 mA current loop output is designed for each loop, so that a user can conveniently connect other upper computers.
The loop card uses a distributed 24V to 5V switching power supply for power supply, the chip is LM33063, the switching frequency is 100KHz, the conversion efficiency is 90%, the output current is 1A/5V, the power consumption of the product is reduced, and the reliability of the product is improved.
3. Power management, namely, realizing the management of main and standby electricity; charging control is carried out on the standby power; and the channel board exchanges power management information.
The power requirement of the switching power supply is 3.7A/27V, the input voltage is AC220V plus 10 percent minus 15 percent, and the requirement meets the national standard requirement.
To ensure the EMI and EMC of the switching power supply meet the national standard requirements, common mode and differential mode interference suppression must be designed at the power input, and a residual current leakage loop is required.
The charging circuit charges the standby power in a current-limiting pulse charging mode, the pulse control is generated by using a single chip microcomputer, the limiting current is set according to 20% of the number of the standby capacitors, the charging current is designed to be adjustable, for example, the standby power with 5AH, and the maximum charging current is 1A; charging fault, standby power undervoltage and main power fault alarm functions must be designed in the management unit; when the standby power supply can not meet the working condition of the controller, the switching power supply is required to carry out sound alarm control, and the sound alarm time exceeds 1H.
The design circuit uses CMOS devices, and has the characteristic of low power consumption; the AC220V is provided with a 16-path detector state, the power consumption is about 60W, and the power consumption is 80W in a full alarm state; the rated power of the switching power supply is 3.7A/27V and 100W, and the power supply capacity is enough to meet the design requirement.
Claims (6)
- BB-6 type gas alarm controller, its characteristic is by the channel board, key board, terminal board mother board, power management board make up, the structure is a disk type, can mount to wall hanging machine, musical instrument platform and vertical cabinet; the BB-6 type gas alarm controller provides 24V voltage for the detector, the detector detects gas sampling, the 4-20 mA signal converted is input into the BB-6 type gas alarm controller, the BB-6 type gas alarm controller is processed by an LPC11C14 single chip microcomputer system, the signal is displayed through liquid crystal, and the signal is converted into a CAN bus, a standard MODBUS protocol and a current loop which are different in type and transmitted.
- 2. The gas alarm controller of claim 1, wherein: a32-bit industrial CPU is used as a data processing and control unit, a model number is LPC11C14, the CPU is a 32-bit industrial singlechip of an M3 kernel of Philips, and 24Kflash, 8Kram, a 1-path CAN bus and a 1-path serial port are integrated in the singlechip.
- 3. The gas alarm controller of claim 1, wherein: in order to ensure the normal operation of the controller, a watchdog circuit NE555 is expanded outside the CPU, the CPU performs a dog feeding operation in a timer interrupt mode, and when the single chip microcomputer is in a dead halt state or a program runs off, the watchdog circuit can reset the CPU.
- 4. The gas alarm controller of claim 1, wherein: the detector power supply outputs a sampling controlled current-limiting mode output, the limiting current is 860mA/24Vdc, the gas detector can be connected, when the output is short-circuited, the current-limiting circuit immediately carries out current-limiting protection, the CPU monitors the reduction of the output voltage and the overlarge current, and the controlled active output can be closed and the fault type can be detected.
- 5. The gas alarm controller of claim 1, wherein: the current loop of the detector inputs the input mode of sampling current-limiting protection, the limiting current is about 30mA, the current loop data sampling circuit uses a precision resistor to carry out current-voltage conversion, a conventional operational amplifier is used for carrying out operational processing, and an A/D conversion input port of a CPU carries out voltage sampling; when the input end of the current loop and the power supply of the detector are in a short circuit of 24V, the current limiting circuit acts to limit current, the interface of the controller is ensured not to be burnt out, and meanwhile, when the input end of the current loop and the 24V are in a short circuit, the CPU detects the short circuit and reports a fault to the short circuit.
- 6. The gas alarm controller of claim 1, wherein: and the charging circuit charges the standby power in a current-limiting pulse charging mode, the pulse control is generated by using a single chip microcomputer, the limiting current is set according to 20% of the number of the standby capacitors, and the design requirement is that the charging current is adjustable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821642192.6U CN209842839U (en) | 2018-10-10 | 2018-10-10 | BB-6 type gas alarm controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821642192.6U CN209842839U (en) | 2018-10-10 | 2018-10-10 | BB-6 type gas alarm controller |
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| CN209842839U true CN209842839U (en) | 2019-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116519890A (en) * | 2023-06-30 | 2023-08-01 | 北京燕山时代仪表有限公司 | Mining gas alarm detector |
-
2018
- 2018-10-10 CN CN201821642192.6U patent/CN209842839U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116519890A (en) * | 2023-06-30 | 2023-08-01 | 北京燕山时代仪表有限公司 | Mining gas alarm detector |
| CN116519890B (en) * | 2023-06-30 | 2023-08-25 | 北京燕山时代仪表有限公司 | Mining gas alarm detector |
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