CN209842838U - DK-4 composite wireless gas detection alarm - Google Patents

Abstract

The utility model discloses a wireless gaseous detection alarm of DK-4 combined type adopts 3.7V lithium cell power supply, and the product comprises sensor signal board, sensor mainboard, main control mainboard and battery protection board several parts, and the sensor signal board carries on four sensor detection external gas, and its working form is: this alarm device utilizes gas sensor to gather gas signal, through STM32L151C8U6/UFQFPN48 singlechip analysis, processing, to received gas signal, through OLED liquid crystal display, audible alarm, vibrating motor vibration, alarm lamp flash and wireless transmission alarm signal, in time convey alarm information for using the customer, prevent the emergence of incident.

Description

DK-4 composite wireless gas detection alarm

Technical Field

The utility model belongs to a wireless alarm can be applied to gaseous detection trade and the gaseous check out test set butt joint of most on the market.

Background

In the maintenance, overhaul and operation of equipment in various explosive and explosive industrial fields such as petroleum, chemical engineering, metallurgy, medicine and the like, in order to prevent the equipment from being damaged in the bud and prevent the safety of people from being threatened due to the leakage of toxic and harmful gases, the alarm which is simple to operate, high in reliability and capable of being carried about is necessary. The alarm can detect poisonous and harmful gas on line, can send out alarm signals in time when detecting that the harmful gas leaks, and wirelessly transmits the alarm signals to a signal receiving end and people nearby, and has good market prospect development

SUMMERY OF THE UTILITY MODEL

1.DK-4 combined type wireless gas detection alarm can detect four kinds of gases simultaneously: carbon monoxide, hydrogen sulfide, oxygen and combustible gas, and is characterized in that: the 3.7V lithium battery is adopted for power supply, the product consists of a sensor signal board, a sensor mainboard, a main control mainboard and a battery protection board which are electrically connected, the sensor signal board is loaded with four sensors with standard structures and types for detecting outside gas, the detected four sensor signals are transmitted to the sensor mainboard, the sensor mainboard receives data detected by the sensors, the data are analyzed and corrected through a singlechip STM32L151C8 on a sensor signal board, signals are transmitted to a main control mainboard for analysis, then the technical effect of detecting four gases is realized by transmitting, displaying and alarming vibration, and the real-time signal of the DK-4 composite wireless gas detection alarm can be sent to other nearby alarm products or relay receiving products with wireless receiving function through wireless signals, the DK-4 combined type wireless gas detection alarm realizes the alarm working process through the above mode.

2. DK-4 combined type wireless gas detection alarm, its sensor signal board characteristic is: four detection sensors: carbon monoxide, hydrogen sulfide, oxygen and combustible gas are detected, external gas is analyzed and transmitted to a sensor mainboard through a sensor characteristic circuit, the carbon monoxide and hydrogen sulfide sensor and the characteristic circuit thereof, AD8607AR is a micropower and two-way amplifier, the power supply voltage is DC2.5V, and detection signals of the S end and the C end of the sensor are amplified and filtered and transmitted to a sensor mainboard single chip microcomputer; an oxygen sensor and a characteristic circuit thereof, wherein a 2.5V power supply micro-power consumption AD8607AR amplifier receives a sensor signal and performs two-stage amplification processing on the signal, an RC filter circuit is formed by R29 and C2, an LC filter circuit is formed by L8, C13 and C14, and the characteristic circuit amplifies and filters the detection signal of the oxygen sensor and outputs the detection signal to a singlechip STM32L151C8 on a sensor mainboard for analysis processing; the combustible gas detection part consists of an AD8609AR two-stage amplification circuit and a peripheral filter circuit, an RC filter circuit is formed by R24 and C41, an LC filter circuit is formed by L10, C33 and C34, a sensor detection signal is amplified, filtered and transmitted to a sensor mainboard singlechip STM32L151C8 for processing and outputting, SPX3819-2.5V is a power conversion chip, the input voltage is DC2.7V, the output voltage is DC2.5V, and the output voltage supplies power for AD8607AR and AD8609 AR.

3. DK-4 combined type wireless gas detection alarm, its sensor mainboard characteristic is: MK1 is a wireless transmitting module, the supply voltage is DC3.3V, LED1 is its power indicator, if the power supply is normal, the power indicator lights up, otherwise it is not bright, JP3 is the wireless transmitting antenna interface, the wireless signal of the detector passes through this interface, 433MHZ transmission frequency is transmitted to the outside, MT3608 is a fixed frequency, SOT23-6 packaged current mode step-up converter, raise the voltage to DC4.2V, ZT7103T is a power conversion chip, convert DC4.2V to DC3V output and another DC-3.3V, R23, C28 and R28, C29 make up RC filter circuit to filter the output voltage, LTC1732-4.2 is a lithium ion battery charging controller, it has battery insertion detection and automatic low voltage battery charging function, the charging threshold voltage is 4.05V, SPX3819-2.5V is a low voltage difference, low noise output reverse voltage regulator, its main function includes battery protection positive voltage, Current limiting and thermal shutdown.

4. DK-4 combined type wireless gas detection alarm, its master control mainboard characteristic is: the main control mainboard mainly receives signals transmitted by an STM32L151C8 singlechip on the main control mainboard from the STM32L151C8 singlechip on the sensor mainboard, and sends alarm and fault signals to a liquid crystal display screen, an alarm lamp, a buzzer and other wireless receiving equipment or relay equipment through a wireless transmission module after processing and analysis, the STM32L151C8 singlechip adopts a 2.7V power supply for power supply, the PCF8563t is a clock chip and provides programmable clock output, all data and addresses of interrupt output and a power failure detector are transmitted in series through a bus interface, and the C3 and the C4 are clock load capacitors and influence the resonant frequency and the output amplitude of a crystal oscillator Y2.

5. DK-4 combined type wireless gaseous detection alarm, its battery protection shield characteristic is: the S-8241 is internally provided with a high-precision voltage detection circuit and a delay circuit and is used for lithium battery charging protection, the F1 is a charging fuse, the R1 is a current-limiting resistor, and the two components play a role in protecting the charging and discharging of the battery and prevent the battery from being damaged due to overhigh charging current.

Drawings

Figure 1 is a circuit schematic block diagram of the present invention,

in the figure: 1. battery powered, 2, liquid crystal display circuit and subsidiary circuit thereof, peripheral circuit such as 3, vibrating motor, bee calling organ, alarm lamp, 4, wireless transmission receiving module system, 5, battery charging, discharge protection circuit, 6, singlechip signal processing and mains operated switching chip, subsidiary filter circuit etc. 7, sensor signal picture 2, figure 3, figure 4, figure 5, figure 6, figure 7 are the utility model discloses the circuit schematic diagram.

Detailed Description

The utility model discloses a concrete implementation mode is:

6. four detection sensors: carbon monoxide, hydrogen sulfide, oxygen and combustible gas, and the four gases outside are detected and analyzed and transmitted to the sensor mainboard through the sensor characteristic circuit. A carbon monoxide and hydrogen sulfide sensor and a characteristic circuit thereof, AD8607AR is a micropower and double-path amplifier, the power supply voltage is DC2.5V, and detection signals of the sensor S and the sensor C are amplified, filtered and transmitted to a sensor mainboard single chip microcomputer. An oxygen sensor and a characteristic circuit thereof, wherein a 2.5V power supply micro-power consumption AD8607AR amplifier receives a sensor signal and performs two-stage amplification processing on the signal, an RC filter circuit is formed by R29 and C2, an LC filter circuit is formed by L8, C13 and C14, and the characteristic circuit amplifies and filters the detection signal of the oxygen sensor and outputs the detection signal to a singlechip STM32L151C8 on a sensor mainboard for analysis processing. The combustible gas detection part consists of an AD8609AR two-stage amplification circuit and a peripheral filter circuit, an RC filter circuit is formed by R24 and C41, an LC filter circuit is formed by L10, C33 and C34, and a sensor detection signal is amplified, filtered and transmitted to a sensor mainboard single chip microcomputer STM32L151C8 for processing and outputting.

SPX3819-2.5V is a power conversion chip, the input voltage is DC2.7V, the output voltage is DC2.5V, and the output voltage supplies power for AD8607AR and AD8609 AR.

7. MK1 is wireless emission module, and supply voltage is DC3.3V, and LED1 is its power indicator, and if the power supply is normal, power indicator is bright, otherwise does not light, and JP3 is wireless transmitting antenna interface, and the probe radio signal passes through this interface, and 433MHZ transmission frequency is outwards launched. MT3608 is a fixed frequency SOT23-6 packaged current mode boost converter, voltage is boosted to DC4.2V, ZT7103T is a power conversion chip, DC4.2V is converted into DC3V output and another DC-3.3V, R23, C28, R28 and C29 form an RC filter circuit to filter the output voltage, LTC1732-4.2 is a lithium ion battery charging controller, the charging controller has functions of battery insertion detection and automatic low voltage battery charging, and the charging threshold voltage is 4.05V. SPX3819-2.5V is a low dropout, low noise output positive voltage regulator whose primary functions include battery reverse protection, current limiting, and thermal shutdown.

8. The main control mainboard mainly receives signals transmitted from the sensor mainboard through the STM32L151C8 singlechip, and sends signals such as alarm and fault to the liquid crystal display screen, the alarm lamp and the buzzer after processing and analyzing, and sends the signals to other wireless receiving equipment or relay equipment through the wireless transmission module. The STM32L151C8 single chip microcomputer is powered by a 2.7V power supply, and the PCF8563t is a clock chip and provides a programmable clock output, an interrupt output and all data and addresses of the power failure detector to be transmitted in series through a bus interface. C3 and C4 are clock load capacitors and influence the resonant frequency and the output amplitude of the crystal oscillator Y2

9. The S-8241 is internally provided with a high-precision voltage detection circuit and a delay circuit and is used for lithium battery charging protection, the F1 is a charging fuse, the R1 is a current-limiting resistor, and the two components play a role in protecting the charging and discharging of the battery and prevent the battery from being damaged due to overhigh charging current.

Claims (5)

1. DK-4 combined type wireless gas detection alarm can detect four kinds of gases simultaneously: carbon monoxide, hydrogen sulfide, oxygen and combustible gas, and is characterized in that: adopt 3.7V lithium cell power supply, the product is by the sensor signal board, the sensor mainboard, the main control mainboard, and several parts of battery protection board are constituteed, the sensor signal board carries on four sensor detection external gas, transmit detected signal to the sensor mainboard, the data that the sensor mainboard received the sensor detection, carry out the analysis correction of data through singlechip STM32L151C8, it analyzes to spread into the main control mainboard with the signal, then the transmission, show, the warning vibration, can also send the real-time signal of DK-4 combined type wireless gas detection alarm for near other warning products or the relay reception product that possesses the wireless receiving function through radio signal.
2. 2. The DK-4 composite wireless gas detection alarm of claim 1, wherein the sensor signal board is characterized by: four detection sensors: carbon monoxide, hydrogen sulfide, oxygen and combustible gas are detected, external gas is analyzed and transmitted to a sensor mainboard through a sensor characteristic circuit, the carbon monoxide and hydrogen sulfide sensor and the characteristic circuit thereof, AD8607AR is a micropower and two-way amplifier, the power supply voltage is DC2.5V, and detection signals of the S end and the C end of the sensor are amplified and filtered and transmitted to a sensor mainboard single chip microcomputer; an oxygen sensor and a characteristic circuit thereof, wherein a 2.5V power supply micro-power consumption AD8607AR amplifier receives a sensor signal and performs two-stage amplification processing on the signal, an RC filter circuit is formed by R29 and C2, an LC filter circuit is formed by L8, C13 and C14, and the characteristic circuit amplifies and filters the detection signal of the oxygen sensor and outputs the detection signal to a sensor mainboard singlechip STM32L151C8 for analysis processing; the combustible gas detection part consists of an AD8609AR two-stage amplification circuit and a peripheral filter circuit, an RC filter circuit is formed by R24 and C41, an LC filter circuit is formed by L10, C33 and C34, a sensor detection signal is amplified, filtered and transmitted to a sensor mainboard singlechip STM32L151C8 for processing and outputting, SPX3819-2.5V is a power conversion chip, the input voltage is DC2.7V, the output voltage is DC2.5V, and the output voltage supplies power for AD8607AR and AD8609 AR.
3. 3. The DK-4 composite wireless gas detection alarm of claim 1, wherein the sensor board is characterized by: MK1 is a wireless transmitting module, the supply voltage is DC3.3V, LED1 is its power indicator, if the power supply is normal, the power indicator lights up, otherwise it is not bright, JP3 is the wireless transmitting antenna interface, the wireless signal of the detector passes through this interface, 433MHZ transmission frequency is transmitted to the outside, MT3608 is a fixed frequency, SOT23-6 packaged current mode step-up converter, raise the voltage to DC4.2V, ZT7103T is a power conversion chip, convert DC4.2V to DC3V output and another DC-3.3V, R23, C28 and R28, C29 make up RC filter circuit to filter the output voltage, LTC1732-4.2 is a lithium ion battery charging controller, it has battery insertion detection and automatic low voltage battery charging function, the charging threshold voltage is 4.05V, SPX3819-2.5V is a low voltage difference, low noise output reverse voltage regulator, its main function includes battery protection positive voltage, Current limiting and thermal shutdown.
4. 4. The DK-4 composite wireless gas detection alarm of claim 1, wherein the main control board is characterized in that: the main control mainboard mainly receives signals transmitted from the sensor mainboard through the STM32L151C8 single chip microcomputer, and sends alarm and fault signals to a liquid crystal display screen, an alarm lamp, a buzzer and other wireless receiving equipment or relay equipment through a wireless transmission module after processing and analysis, the STM32L151C8 single chip microcomputer adopts a 2.7V power supply for power supply, the PCF8563t is a clock chip and provides programmable clock output, interrupt output and serial transmission of all data and addresses of a power failure detector through a bus interface, and the C3 and the C4 are clock load capacitors and influence the resonant frequency and the output amplitude of the crystal oscillator Y2.
5. 5. The DK-4 composite wireless gas detection alarm of claim 1, wherein the battery protection board is characterized by: the S-8241 is internally provided with a high-precision voltage detection circuit and a delay circuit and is used for lithium battery charging protection, the F1 is a charging fuse, the R1 is a current-limiting resistor, and the two components play a role in protecting the charging and discharging of the battery and prevent the battery from being damaged due to overhigh charging current.