CN210572080U

CN210572080U - Multifunctional portable methane detection alarm

Info

Publication number: CN210572080U
Application number: CN201921353371.2U
Authority: CN
Inventors: 李燕杰; 申海生; 茹瑞鹏; 贾楠; 谢永存; 李刚; 崔凯; 刘杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-19
Anticipated expiration: 2029-08-20

Abstract

The utility model relates to a methane detection alarm, a multi-functional portable methane detection alarm, include the casing and install the microprocessor inside the casing, the sensor, signal amplification circuit, the display screen circuit, alarm circuit, power supply circuit, switch circuit, the sensor includes methane carrier catalytic element (methane sensor) and electric field sensing element, microprocessor adopts the PIC16F1937 chip, power supply circuit adopts the LTC3440 chip, signal amplification circuit adopts TLC27L4 chip, electric field sensing element adopts JW0818 chip, the Vout pin of power supply circuit LTC3440 chip is connected to the VDD pin of PIC16F1937 chip, the RB1 of PIC16F1937 chip, RB2, RB3 pin is connecting switch circuit S1 respectively, S2, S3 pin, the RA0 pin of PIC16F1937 chip connects the 3OUT pin of TLC27L4 chip.

Description

Multifunctional portable methane detection alarm

Technical Field

The utility model relates to a methane detection alarm, especially the mine electrician uses, can remind the electrified methane detection alarm of equipment, specifically says so a have nearly electric alarming function's portable methane detection alarm concurrently.

Background

The underground electrician belongs to a special work category, can open a cover when detecting that the concentration of environmental gas is lower than 0.5 percent before checking and maintaining electrical equipment, and strictly execute operations such as power failure, electricity testing, discharging and the like. Therefore, at present, underground electricians are provided with mining test pens and portable methane detection alarm instruments. The main problems and defects are that: 1. the mining test pencil can accurately identify whether the equipment is electrified or not only by contacting with an electrified body, but also lacks of an audible and visual alarm function, and if an electrician mistakenly operates or mistakenly enters an electrified interval, the contact electricity testing is not carried out at the moment, so that an electric shock accident is easy to occur; 2. electricians do not cut off the power of the upper-level switch, overhaul or wire the load side of the switch at the current level, and cannot find and stop the operation in time by safety or other management personnel during live-line illegal operation, so that great potential safety hazards exist; 3. the calibration early warning value of the general portable methane detection alarm instrument is 0.8%, and in the equipment maintenance process, especially in the electrified maintenance in the step 2, when the environmental gas concentration is more than 0.5% and less than 0.8%, the portable methane detection alarm instrument cannot give out sound and light alarm, and gas accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to above-mentioned prior art not enough, provide a small, light in weight, convenient to carry, collect non-contact and test functions in portable methane detection alarm appearance in an organic whole such as electricity, real-time gas detection, clock look over. This multi-functional portable methane detection alarm can solve above-mentioned problem well, eliminates the potential safety hazard, reduces the safety risk, improves mine and personnel's security.

The utility model adopts the technical proposal that: a multifunctional portable methane detection alarm comprises a shell, a microprocessor and a sensor, wherein the microprocessor and the sensor are arranged inside the shell, a signal amplifying circuit, a display screen circuit, an alarm circuit, a power circuit and a switch circuit, the sensor comprises a methane carrier catalytic element (a methane sensor) and an electric field sensing element, the microprocessor adopts a PIC16F1937 chip, the power circuit adopts an LTC3440 chip, the signal amplifying circuit adopts a TLC27L4 chip, the electric field sensing element adopts a JW0818 chip, a VDD pin of the PIC16F1937 chip is connected with a Vout pin of the LTC3440 chip of the power circuit, RB6, RB2 and RB3 pins of the PIC16F1937 chip are respectively connected with switch circuits S1, S2 and S3 pins, an RA0 pin of the PIC16F1937 chip is connected with a 3OUT pin of the TLC27L4 chip, a 1IN +, a 2 + pin of the TLC27L4 chip is connected with a methane carrier catalytic element Vout2, a 2 Vout pin, an RA 3 pin of the PIC16F1937 chip is connected with a JW 7378 pin, an RC 388 pin, the pins RC2, RC3, RC4, RC5, RC6, RC7, RB4, RB5, RB6 and RB7 are respectively connected with the pins DP, g, f, e, d, c, b, a, K1, K2, K3 and K4 of the display screen circuit nixie tube.

The signal amplifying circuit comprises a TLC27L4 operational amplifier and a slide rheostat, and the alarm sensitivity can be adjusted through the slide rheostat to control the charged alarm distance.

The alarm circuit comprises a driving NPN type triode, an LED lamp and a buzzer, wherein a pin B of the triode is connected with pins RE1 and RE2 of a PIC16F1937 chip of the microprocessor, a pin C of the triode is connected with the LED and the buzzer, and pins RE1 and RE2 of the PIC16F1937 chip are respectively connected with pins B of the triode Q1 and Q2 of the alarm circuit.

The triode is a CMOS tube, the LED lamp is a common anode red-yellow double-color light-emitting diode, and the buzzer is a double-sound-piece buzzer.

The utility model has the advantages that: the utility model discloses collect functions in an organic whole such as non-contact electricity of testing, real-time gas detection, clock are looked over, small, light in weight, convenient to carry. When an electrician opens the switch cover, or misoperation or manual live operation is performed, the instrument can give out sound and light alarm, so that electric shock accidents caused by misoperation of the underground electrician are effectively avoided, and the illegal live operation of the underground electrician is effectively controlled; the alarm circuit adopts a common anode red-yellow double-color light-emitting diode and a double-sound-piece buzzer, the electrified alarm and the gas overrun alarm correspond to different alarm modes, and the alarm edge is clear; the signal amplification circuit adopts a TLC27L4 operational amplifier and a slide rheostat, and the sensitivity can be adjusted according to the mine field condition; the gas calibration value is 0.5%, and when the environmental gas concentration exceeds the early warning value, a sound-light alarm can be given out, so that the gas explosion accidents of a mine can be effectively reduced, particularly the gas explosion accidents caused by electric sparks; the non-contact electricity testing function can induce the charged state of the non-shielding cable, and can assist the underground electrician in troubleshooting the cable fault.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the connection of the PIC16F1937 microprocessor to the LTC3440 power supply circuit;

FIG. 3 is a schematic diagram of the connection of the PIC16F1937 microprocessor to the display screen circuit;

FIG. 4 is a schematic diagram of the connection between the PIC16F1937 microprocessor and the audible and visual alarm circuit;

FIG. 5 is a schematic diagram of the connection of a PIC16F1937 microprocessor and a JW0818 electric field induction element;

FIG. 6 is a schematic diagram of the PIC16F1937 microprocessor in electrical connection with a CJB4 methane catalyst support element and its amplifier circuit by TLC27L 4;

fig. 7 is a schematic diagram of the connection of the PIC16F1937 microprocessor to the switching circuit.

Detailed Description

The technical solutions and advantages of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in figure 1, the multifunctional portable methane detection alarm comprises a shell, and a PIC16F1937 microprocessor, a sensor, a signal amplification circuit, a display screen, an alarm circuit, a power supply circuit and a switch circuit which are arranged inside the shell. The VDD pin of the microprocessor PIC16F1937 chip is connected with the Vout pin of the power circuit LTC3440 chip, and the RB1, RB2 and RB3 pins of the microprocessor PIC16F1937 chip are respectively connected with the S1, S2 and S3 pins of the switch circuit, the RA0 pin of the microprocessor PIC16F1937 chip is connected with the 3OUT pin of the signal amplification circuit TLC27L4 chip, the pins 1IN + and 2IN + of the TLC27L4 chip of the signal amplification circuit are connected with pins Vout1 and Vout2 of a methane catalytic element, the RA1 pin of the microprocessor PIC16F1937 chip is connected with the 6 pins of the electric field induction element JW0818 chip, the pins RC0, RC1, RC2, RC3, RC4, RC5, RC6, RC7, RB4, RB5, RB6 and RB7 of the microprocessor PIC16F1937 chip are respectively connected with the pins DP, g, F, e, d, c, b, a, K1, K2, K3 and K4 of a display screen circuit nixie tube, pins RE1 and RE2 of the microprocessor PIC16F1937 chip are respectively connected with pins B of the alarm circuit triodes Q1 and Q2. The signal amplification circuit comprises a TLC27L4 operational amplifier and a slide rheostat, and the alarm sensitivity can be adjusted through the slide rheostat to control the electrified alarm distance. The alarm circuit comprises a driving triode NPN, an LED lamp and a buzzer, wherein a pin B of the triode is connected with pins RE1 and RE2 of a PIC16F1937 chip of the microprocessor, and a pin C of the triode is connected with the LED and the buzzer. The triode is a CMOS tube, the LED is a common anode red-yellow double-color light-emitting diode, and the buzzer is a double-sound-piece buzzer.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and is not to be construed as limiting the scope of the invention. It is to be understood that the above description is intended to be illustrative, and not restrictive. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a multi-functional portable methane detection alarm, its characterized in that: the sensor comprises a shell, and a microprocessor and a sensor which are arranged IN the shell, wherein the microprocessor adopts a PIC16F1937 chip, the power supply circuit adopts an LTC3440 chip, the signal amplification circuit adopts a TLC27L4 chip, the electric field sensing element adopts a JW0818 chip, a VDD pin of the PIC16F1937 chip is connected with a Vout pin of the LTC3440 chip of the power supply circuit, RB1, RB2 and RB3 pins of the PIC16F1937 chip are respectively connected with switching circuits S1, S2 and S3 pins, an RA0 pin of the PIC16F1937 chip is connected with a 3OUT pin of a TLC27L4 chip, a 1IN +, 2IN + pin of the TLC27L4 chip is connected with a methane carrier catalytic element Vout 5, a 58Vout 23 pin, an RA 58 1 pin of the PIC16F1937 chip is connected with a JW 8 chip pin, an RC 24 pin of the PIC16F1937 chip, an RC0 pin RB 24, an RB 5928 pin, an RC 599 pin of the PIC 599 chip, an RC 598653 and an RC 5958 chip are respectively, g. f, e, d, c, b, a, K1, K2, K3, K4 pins.

2. The multifunctional portable methane detection alarm instrument according to claim 1, characterized in that: the signal amplifying circuit comprises a TLC27L4 operational amplifier and a slide rheostat, and the alarm sensitivity can be adjusted through the slide rheostat to control the charged alarm distance.

3. The multifunctional portable methane detection alarm instrument according to claim 1, characterized in that: the alarm circuit comprises a driving NPN type triode, an LED lamp and a buzzer, wherein a pin B of the triode is connected with pins RE1 and RE2 of a PIC16F1937 chip of the microprocessor, a pin C of the triode is connected with the LED and the buzzer, and pins RE1 and RE2 of the PIC16F1937 chip are respectively connected with pins B of the triode Q1 and Q2 of the alarm circuit.

4. The multifunctional portable methane detection alarm instrument according to claim 3, characterized in that: the triode is a CMOS tube, the LED lamp is a common anode red-yellow double-color light-emitting diode, and the buzzer is a double-sound-piece buzzer.