CN219573986U

CN219573986U - Low-power-consumption safe explosion-proof gas detection alarm

Info

Publication number: CN219573986U
Application number: CN202320345488.6U
Authority: CN
Inventors: 谭周省; 张楚应
Original assignee: Shenzhen Unitec Technology Co ltd
Current assignee: Shenzhen Unitec Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-08-22
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses a low-power-consumption safe explosion-proof gas detection alarm instrument, which comprises a main control chip IC1 for data processing and control, a power supply module for power supply, a sensor for gas detection, a storage chip U1 for storing relevant data of the alarm instrument, a buzzer for alarming, a vibration motor for alarming and an LED lamp for alarming, wherein the main control chip IC1 is used for processing and controlling data; an operational amplifier U2 is connected between the sensor and the main control chip IC 1; the memory chip U1 is connected with the main control chip IC 1; a buzzer power supply switching tube Q7 and a buzzer driving chip U3 are connected between the buzzer and the main control chip IC 1; a vibration motor switch tube Q8 is connected between the vibration motor and the main control chip IC 1; an LED switching tube is connected between the LED lamp and the main control chip IC 1; the technical scheme of the utility model solves the problems of short endurance and poor safety of the existing gas detection alarm.

Description

Low-power-consumption safe explosion-proof gas detection alarm

Technical Field

The utility model relates to the technical field of gas detection, in particular to a low-power-consumption safe explosion-proof gas detection alarm instrument.

Background

The gas detector is an instrument tool for detecting the concentration of gas leakage, can be divided into a desk type gas detector and a hand-held gas detector according to the use mode, can be divided into a single gas detector and a plurality of gas detectors according to the quantity of the detectable gas, and can be divided into an infrared gas detector, a thermomagnetic gas detector, an electrochemical gas detector, a semiconductor gas detector, an ultraviolet gas detector and the like according to the principle of a gas sensor.

The existing handheld gas detector in the market is easy to suffer from electromagnetic interference and electrostatic interference of interphones in field use, low in protection level, large in size, inconvenient to move and carry, short in battery endurance time, needs to be charged frequently and the like, and even the problem that the field environment is influenced by low temperature easily occurs, so that the service life of equipment is greatly shortened.

Disclosure of Invention

The utility model provides a low-power-consumption safe explosion-proof gas detection alarm, which solves the problems of short endurance and poor safety of the existing gas detection alarm.

The embodiment of the utility model provides a low-power-consumption safe explosion-proof gas detection alarm instrument, which comprises a main control chip IC1 for data processing and control, a power supply module for power supply, a sensor for gas detection, a storage chip U1 for storing relevant data of the alarm instrument, a buzzer for alarming, a vibration motor for alarming and an LED lamp for alarming, wherein the main control chip IC1 is used for processing and controlling data;

an operational amplifier U2 is connected between the sensor and the main control chip IC 1; the memory chip U1 is connected with the main control chip IC 1; a buzzer power supply switching tube Q7 and a buzzer driving chip U3 are connected between the buzzer and the main control chip IC 1; a vibration motor switch tube Q8 is connected between the vibration motor and the main control chip IC 1; an LED switching tube is connected between the LED lamp and the main control chip IC 1;

a safe interval isolation resistor is respectively arranged among the buzzer power supply switching tube Q7, the buzzer driving chip U3, the vibration motor switching tube Q8, the LED switching tube and the main control chip IC 1; the voltage output end of the power supply module is provided with a current-limiting reliable resistor.

In some embodiments, the low-power-consumption low-temperature drift voltage reference chip U6 is used for providing a reference voltage of 1.25V for the main control chip IC1 and the operational amplifier U2, and the model of the low-power-consumption low-temperature drift voltage reference chip U6 is set as REF3312.

In some embodiments, the number of the LED lamps is two, including an LED lamp D5 and an LED lamp D6, where the LED lamp D5 and the LED lamp D6 are connected with an LED switch tube Q4 and an LED switch tube Q5 respectively.

In some embodiments, the buzzer power supply switching tube Q7 is set as a MOS tube of the model a03401, the vibration motor switching tube Q8 is set as a MOS tube of the model a03400, and the LED switching tube Q4 and the LED switching tube Q5 are both set as MOS tubes of the model S8050.

In some embodiments, the master chip IC1 is configured as a microprocessor chip of model MSP430F 6723.

In some embodiments, the sensor is configured as a TG electrochemical sensor.

In some embodiments, the memory chip U1 is set as a memory chip of model AT24C 16D.

In some embodiments, the operational amplifier U2 is set to an operational amplifier of model TLV 8812.

In some embodiments, two protection diodes are connected in parallel to two ends of the vibration motor.

In some embodiments, the power module is configured as a lithium-thionyl chloride high energy density battery.

Compared with the prior art, the utility model has the beneficial effects that: meets the international authentication standard of IECex IIC Ia T4 Ga, and is suitable for the explosive gas mixture sites with IIA, IIB, IIC grade and temperature groups T1-T4 in factories;

the low-power consumption complete machine working current is free from worrying about the battery endurance problem in the field operation environment, and the charging-free working life is longer than two years;

the circuit is compatible with various electrochemical three-electrode gas sensor types, and various circuit boards are not required to be designed to adapt to sensors of different types.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic block diagram of an alarm device according to the present utility model;

FIG. 2 is a schematic diagram of an operational amplifier U2 according to the present utility model;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The embodiment provides a low-power-consumption safe explosion-proof gas detection alarm, referring to fig. 1, which comprises a main control chip IC1 for data processing and control, a power supply module for power supply, a sensor for gas detection, a storage chip U1 for storing relevant data of the alarm, a buzzer for alarming, a vibration motor for alarming and an LED lamp for alarming;

Referring to fig. 1, in the present embodiment, each of the safety-distance isolation resistors is an isolation resistor between a VDD power supply and a VCC power supply, and is packaged with 1206 to meet the Ia requirement for a 1.5mm electrical gap, and the power p=3.9×3.9/1000=0.015W under fault is far less than 0.25w×0.7=0.175W of the 1206 resistor package, so as to meet the reliable resistance requirement; the two current limiting reliable resistors (R19 and R22) are arranged, so that the surface temperature of the functional circuit device is less than 135 ℃ when the functional circuit device fails, the requirement of T4 is met, and the current I=3.9/24=162.5 MA in the failure state; the power p=3.9×3.9/24=0.63W, which is smaller than 2512 resistor package power 1w×0.7=0.7W, and meets the requirement of reliable resistance; the two current limiting reliable resistors are also respectively connected with two capacitors (C1 and C2) to be grounded, and the total capacitance is 31.17uF which is smaller than the allowable capacitance of IIC class equipment under the factor of 1.5.

Further, the low-power-consumption low-temperature drift voltage reference chip U6 is used for providing 1.25V reference voltage for the main control chip IC1 and the operational amplifier U2, and the model of the low-power-consumption low-temperature drift voltage reference chip U6 is set as REF3312.

Further, the number of the LED lamps is two, the LED lamps comprise an LED lamp D5 and an LED lamp D6, and the LED lamp D5 and the LED lamp D6 are respectively connected with an LED switch tube Q4 and an LED switch tube Q5.

Further, the buzzer power supply switching tube Q7 is set as a MOS tube of a model A03401, the vibration motor switching tube Q8 is set as a MOS tube of a model A03400, and the LED switching tube Q4 and the LED switching tube Q5 are both set as MOS tubes of a model S8050. It should be noted that, each switch tube is in the off state under normal condition, and when gas concentration exceeds the limit and reports to the police, master control chip IC1 controls each switch tube to open to drive corresponding alarm device and report to the police, when satisfying the warning demand, can save the energy consumption.

Further, the main control chip IC1 is set as a micro-processing chip with the model MSP430F6723, and a 24-bit high-precision analog-to-digital conversion and a driving module of an LCD code breaking screen are integrated inside, and meanwhile, the chip current can be reduced to 5uA in an ultra-low power consumption mode.

Further, the sensor is configured as a TG electrochemical sensor for converting toxic and harmful gases leaked in air species into a current signal through an internal oxidation-reduction reaction, and the magnitude of the current value is proportional to the gas concentration.

Further, the memory chip U1 is set as a memory chip of a model AT24C16D, stores factory setting parameters and gas calibration values, and stores alarm record information of the instrument in the use process of the operation place.

Further, referring to fig. 2, the operational amplifier U2 is set as an operational amplifier of model TLV8812, where the operational amplifier U2 and the peripheral resistive element form a potentiostatic circuit and an IV transimpedance amplifier circuit, the potentiostatic circuit maintains the working electrode WE and the reference electrode RE of the SE1 electrochemical sensor to keep equipotential, and the R37 resistor in the IV transimpedance amplifier circuit converts the current signal value of the sensor into a voltage value VSI, where the magnitude of the voltage value is proportional to the gas concentration.

Further, the buzzer driving chip U3 is set as a driving chip of a model TLC3702, the buzzer is set as a piezoelectric buzzer, and when the alarm detects that the concentration of toxic and harmful gas exceeds the limit value range in the working environment, the buzzer sends sound pressure of up to 95 dB to remind an operator.

Further, two protection diodes are connected in parallel at two ends of the vibration motor and used as a shunt safety component of the vibration motor so as to meet at least two parallel diode paths of ia requirements.

Further, the power supply module is set as a lithium-thionyl chloride high-energy density battery, and simultaneously has ultralow self-discharge current, and a circuit matched with ultralow power consumption in the instrument can be continuously used for two years.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The low-power-consumption safe explosion-proof gas detection alarm is characterized by comprising a main control chip IC1 for data processing and control, a power supply module for power supply, a sensor for gas detection, a storage chip U1 for storing relevant data of the alarm, a buzzer for alarming, a vibration motor for alarming and an LED lamp for alarming;

2. The low power consumption safe explosion-proof gas detection alarm apparatus according to claim 1, further comprising a low power consumption low temperature drift voltage reference chip U6 for providing a reference voltage of 1.25V to the main control chip IC1 and the operational amplifier U2, wherein the model of the low power consumption low temperature drift voltage reference chip U6 is set as REF3312.

3. The low-power-consumption safe explosion-proof gas detection alarm device according to claim 1, wherein the number of the LED lamps is two, the LED lamps comprise an LED lamp D5 and an LED lamp D6, and the LED lamp D5 and the LED lamp D6 are respectively connected with an LED switch tube Q4 and an LED switch tube Q5.

4. The low-power-consumption safe explosion-proof gas detection alarm device according to claim 3, wherein the buzzer power supply switching tube Q7 is set as a MOS tube of a model A03401, the vibration motor switching tube Q8 is set as a MOS tube of a model A03400, and the LED switching tube Q4 and the LED switching tube Q5 are both set as MOS tubes of a model S8050.

5. The low power consumption safety explosion-proof gas detection alarm apparatus according to claim 1, wherein the main control chip IC1 is a micro-processing chip of model MSP430F 6723.

6. The low power consumption safety explosion proof gas detection alarm as set forth in claim 1, wherein said sensor is configured as a TG electrochemical sensor.

7. The low power consumption safety explosion-proof gas detection alarm apparatus according to claim 1, wherein the memory chip U1 is a memory chip of a model AT24C 16D.

8. The low power safe explosion-proof gas detection alarm as set forth in claim 1, wherein said operational amplifier U2 is provided as an operational amplifier of model TLV 8812.

9. The low-power-consumption safe explosion-proof gas detection alarm device according to claim 1, wherein two protection diodes are connected in parallel at two ends of the vibration motor.

10. The low power safe explosion-proof gas detection alarm as set forth in claim 1, wherein said power module is configured as a lithium-thionyl chloride high energy density battery.