CN203931111U - A kind of natural gas leaking radio telephone alarm - Google Patents

Abstract

The utility model discloses a natural gas leakage wireless telephone alarm, which comprises a main controller, and is characterized in that: a voltage stabilizing power supply circuit, a natural gas detection circuit, an information memory, a global mobile communication system module, a voice circuit, a man-machine interaction module and a simulation The control switch is connected with the main controller respectively, and the SIM card slot and the antenna are respectively connected with the GSM module. Compared with the prior art, the utility model has the main advantage that the information memory, the main controller, the voice circuit, the GSM The combination of modules realizes the automatic alarm of SMS and wireless telephone network, ensuring the correct and rapid transmission of alarm information; at the same time, the alarm can be set with special alarm telephone numbers, such as fire alarm 119, etc., and can also be set with multiple private alarm telephones Number, to ensure that the police are found in time.

Description

A wireless telephone alarm for natural gas leakage

technical field

The utility model relates to a wireless telephone alarm for natural gas leakage, which belongs to the technical field of natural gas safety equipment.

Background technique

At present, the use of natural gas is becoming more and more popular, and the hidden danger of natural gas leakage has gradually attracted people's attention. According to the statistics of gas accidents in 2011, the proportion of accidents caused by gas leakage exceeds 50%. When natural gas leaks due to factors such as pipeline damage or forgetting to close the valve, sometimes because there is no one on site or the site personnel are unconscious, it is impossible to deal with it in time, which may cause incalculable personal casualties and property losses. The wired telephone alarm device can send out SMS alarm signals and telephone voice alarm signals when a natural gas leak is detected. However, due to the fact that the text messages may not be checked in time and the telephone line is aging or damaged due to construction, this device should be used when a natural gas leak is found. It may not be possible to report to the police in time, and there are major defects.

Contents of the invention

The purpose of this utility model is: to provide a natural gas leakage wireless telephone alarm to solve the problem that the alarm message may not be consulted in time after the natural gas leakage is found and the alarm signal of the alarm message and the telephone voice alarm signal are sent out by the alarm device of the short message and the wired telephone. If the telephone line is damaged, it is impossible to carry out telephone voice alarm, so there is a problem of relatively large defects.

Technical scheme of the utility model

A natural gas leakage wireless telephone alarm, comprising a main controller, a stabilized power supply circuit, a natural gas detection circuit, an information memory, a global system for mobile communication module, a voice circuit, a human-computer interaction module and an analog control switch are respectively connected to the main controller, The SIM card slot and the antenna are respectively connected to the GSM module.

In the aforementioned wireless telephone alarm for natural gas leakage, a manual reset circuit and an internal oscillating clock circuit are respectively connected to the periphery of the main controller.

In the aforementioned natural gas leakage wireless telephone alarm, the stabilized power supply circuit uses a three-terminal stabilized chip to step down and stabilize the external voltage for the first time, and then use C2 and C3 capacitors connected in parallel to filter each other, and finally through the stabilized voltage The diode outputs the set voltage.

In the aforementioned natural gas leakage wireless telephone alarm, the natural gas detection circuit is mainly based on a gas sensor, and is connected to the operational amplifier LM393 through a series load resistor to convert the natural gas concentration value into an analog voltage value, and then compare the voltage with the operational amplifier LM393 The controller is connected with the main controller, and the analog voltage value obtained by converting the natural gas concentration value is converted into a digital signal and sent to the main controller.

In the aforementioned wireless telephone alarm for natural gas leakage, the information memory is connected to the main controller in a non-write-protected manner.

In the aforementioned wireless telephone alarm for natural gas leakage, the GSM module is serially connected to the main controller through a serial port.

In the aforementioned wireless telephone alarm for natural gas leakage, the voice circuit is connected to the main controller through a triode.

In the aforementioned wireless telephone alarm for natural gas leakage, the analog control switch is composed of two driving circuits and two electromagnetic relays. The driving circuit uses a photocoupler with a triode and is connected to the main controller through a photocoupler.

Compared with the prior art, the utility model has the main advantage of realizing the automatic alarm of short message and wireless telephone network through the combination of information memory, main controller, voice circuit and global mobile communication system module, so as to ensure the correct and rapid transmission of alarm information Simultaneously, described alarm can be provided with special alarm telephone number, as fire alarm 119 etc., can be provided with a plurality of private alarm telephone numbers again, guarantees that alarm situation is found in time.

Description of drawings

Accompanying drawing 1 is a schematic diagram of the utility model system;

Accompanying drawing 2 is the display, reset circuit and clock circuit connection circuit schematic diagram of main controller and human-computer interaction module in the utility model;

Accompanying drawing 3 is a schematic diagram of a voltage stabilizing power supply circuit in the utility model;

Accompanying drawing 4 is the schematic diagram of information memory circuit in the utility model;

Accompanying drawing 5 is a schematic diagram of a natural gas detection circuit in the utility model;

Accompanying drawing 6 is a schematic diagram of an analog switch circuit in the utility model;

Accompanying drawing 7 is the global system for mobile communication GSM schematic diagram in the utility model;

Accompanying drawing 8 is a schematic diagram of the matrix keyboard circuit in the human-computer interaction module in the utility model;

Accompanying drawing 9 is the voice circuit schematic diagram in the utility model;

Accompanying drawing 10 is the circuit diagram of SIM card slot in the utility model.

Detailed ways

The utility model is used as a further detailed description below in conjunction with the accompanying drawings, but not as any limitation to the utility model.

Embodiment of the present utility model: a wireless telephone alarm device for natural gas leakage, as shown in the accompanying drawings, includes a main controller, a voltage stabilized power supply circuit, a natural gas detection circuit, an information memory, a global mobile communication system module, a voice circuit, a man-machine The interactive module and the analog control switch are respectively connected to the main controller, the SIM card slot and the antenna are respectively connected to the GSM module, and the main controller is respectively connected with a manual reset circuit and an internal oscillation clock circuit.

Wherein the stabilized power supply circuit uses a three-terminal stabilized chip to step down and stabilize the external voltage for the first time, then use C2 and C3 capacitors connected in parallel for filtering, and finally output the set voltage through the stabilized diode, the natural gas The detection circuit takes the gas sensor as the main body, connects the op-amp LM393 through a series load resistor, converts the natural gas concentration value into an analog voltage value, and then connects the voltage comparator formed by the op-amp LM393 to the main controller, and converts the natural gas concentration value into The analog voltage value is converted into a digital signal and sent to the main controller. The information memory is connected to the main controller in a non-write-protected manner. The GSM module is connected to the main controller through a serial port in a serial manner. The voice circuit is connected to the main controller through a triode. The analog control switch is composed of two driving circuits and two electromagnetic relays. The driving circuit uses a photocoupler to cooperate with the triode and is connected to the main controller through a photocoupler. Includes monitor and matrix keyboard

In specific use, the main controller is preferably STC89C52 stand-alone chip; the sensor of the natural gas detection circuit is preferably MQ-4 gas sensor; the regulated power supply circuit is preferably LM7805 regulated power supply; the information memory is preferably AT24C02 EEPROM; The communication system module is preferably the GSM module TC35i of Siemens.

In actual use, make a printed circuit board (PCB board) according to the drawings, and assemble it in an insulating shell (can be plastic), and insert the SIM card of China Mobile or China Unicom that has activated telephone and SMS services into the SIM card slot , supply power through the regulated power supply circuit, use the matrix keyboard in the human-computer interaction module to input the password and set the alarm phone number and store it in the information memory, the natural gas detection circuit automatically detects the concentration of natural gas in the air to determine whether there is a leakage, when the natural gas When the concentration reaches or exceeds the set value, that is, in the alarm state, the main controller first controls the analog switch circuit to close the natural gas switch, such as the gas solenoid valve; secondly, the alarm information, such as: the location where the alarm occurred, etc. memory, and read the alarm telephone number from the information memory; then, immediately control the global system for mobile communication module to send the alarm information to the alarm mobile phone in the form of a short message, and judge whether the sending is successful by reading the returned data of the alarm mobile phone, if not If successful, resend until the sending is successful; and call the alarm phone number, if it is judged as busy by the returned data, hang up, take out the next alarm phone number from the information memory, and call again; if it is judged as unmanned by the returned data When answering, also hang up, take out the next alarm phone number from the information memory, and call again until the call is successful; if it is judged as connected through the returned data, control the voice module to make a voice alarm, and pass the alarm information to the receiving station , to ensure the safety of people and property.

Claims (8)

1. a natural gas leaking radio telephone alarm, comprise primary controller, it is characterized in that: voltage-stabilized power supply circuit, detection of natural gas circuit, information-storing device, global system for mobile communications module, sound circuit, human-computer interaction module and simulation gauge tap are connected with primary controller respectively, sim card slot is connected respectively global system for mobile communications module with antenna.

2. natural gas leaking radio telephone alarm according to claim 1, is characterized in that: be connected with respectively manual reset circuit and internal oscillator clock circuit in primary controller periphery.

3. natural gas leaking radio telephone alarm according to claim 1, it is characterized in that: described voltage-stabilized power supply circuit carries out lowering and stabilizing blood pressure for the first time by three-terminal voltage-stabilizing chip by external voltage, then adopt C2 parallel with one another, C3 electric capacity to carry out filtering, finally export setting voltage by voltage stabilizing diode.

4. natural gas leaking radio telephone alarm according to claim 1, it is characterized in that: described detection of natural gas circuit is taking gas sensor as main body, be connected with amplifier LM393 by series load resistance, concentration of natural gas value is converted into analog voltage, the voltage comparator consisting of amplifier LM393 is again connected with primary controller, the conversion of concentration of natural gas value is obtained to analog voltage and transfer digital signal to, send into primary controller.

5. natural gas leaking radio telephone alarm according to claim 1, is characterized in that: described information-storing device adopts and is connected with primary controller without write-protect mode.

6. natural gas leaking radio telephone alarm according to claim 1, is characterized in that: described global system for mobile communications module adopts serial mode to be connected with primary controller by serial ports.

7. natural gas leaking radio telephone alarm according to claim 1, is characterized in that: described sound circuit is connected with primary controller by triode.

8. natural gas leaking radio telephone alarm according to claim 1, it is characterized in that: described simulation gauge tap is made up of two-way driving circuit and two-way electromagnetic relay, driving circuit adopts photoelectrical coupler coordinate triode and be connected with primary controller by photoelectrical coupler.