Low-power-consumption gas monitoring and early warning system

Abstract

The utility model provides a gas monitoring and early warning system with low power consumption. The gas monitoring and early warning system comprises a processing module, a monitoring module, an alarm module and a power supply module, the monitoring module and the alarm module are connected with the processing module, and the processing module communicates with an external monitoring platform; an external power supply is connected with the processing module and the monitoring module through the power supply module. According to the utility model, the chip used by each module is a low-power-consumption chip, and the CPU chip controls the power supply module to supply power to the monitoring module at regular time by controlling the on / off of the switch unit, so that the overall power consumption of the monitoring system is further reduced, and the endurance time of a battery is prolonged; and meanwhile, when an alarm event occurs, communication with an external monitoring platform can be immediately carried out, so that a user can make corresponding treatment in time, and the safety risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the industrial control field, especially a kind of low-power gas monitoring early warning system. BACKGROUND

[0002] With the acceleration of industrialization and the improvement of living standards, the use of flammable gases is increasingly widespread, including but not limited to natural gas, liquefied petroleum gas (LPG), propane and the like. While these gases bring convenience to human life, they also pose potential safety risks, especially gas leaks, which can lead to fires, explosions and other serious accidents. Therefore, developing efficient and reliable flammable gas monitoring systems is crucial for public safety.

[0003] Existing flammable gas monitoring systems mainly rely on sensor technology to detect the concentration of flammable gases in the air. Once the gas concentration exceeds the preset safety threshold, the system will trigger an alarm to alert users to take emergency measures. However, the monitoring systems currently on the market have some significant limitations:

[0004] Energy consumption: Many flammable gas monitors are powered by batteries to facilitate flexible deployment in different environments. Unfortunately, due to the need for continuous sensor operation and signal transmission, these devices often have high energy consumption, resulting in limited battery life. Frequent battery replacement not only increases the cost of use but also reduces user experience.

[0005] Slow response: Some monitoring systems respond too slowly after detecting gas leaks, failing to issue timely alarms. This delay can leave valuable time windows for personnel evacuation and emergency response, increasing safety risks. SUMMARY

[0006] To address the above problems, the utility model provides a low-power gas monitoring early warning system.

[0007] The main content of the utility model includes:

[0008] A low-power gas monitoring early warning system includes a processing module, a monitoring module, an alarm module and a power supply module. The monitoring module and the alarm module are connected to the processing module, and the processing module communicates with an external monitoring platform. An external power source is connected to the processing module and the monitoring module through the power supply module.

[0009] The processing module comprises a CPU chip, the monitoring module comprises a combustible gas sensor, and the power supply module comprises a voltage stabilizing chip.

[0010] Preferably, the sleep MOS tube is of NMOS type, the gate of the sleep MOS tube is connected with the sleep control pin of the CPU chip, the drain thereof is connected with the power supply, and the source thereof is grounded; and the enable end and the input end of the voltage stabilizing chip are connected with an external power supply.

[0011] Preferably, the power supply module further comprises a first noise reduction capacitor, one end of the first noise reduction capacitor is connected between the input end of the voltage stabilizing chip and the external power supply, and the other end thereof is grounded.

[0012] Preferably, the power supply module further comprises a second noise reduction capacitor and a third noise reduction capacitor, one end of the parallel connection of the second noise reduction capacitor and the third noise reduction capacitor is connected with the output end of the voltage stabilizing chip, and the other end thereof is grounded.

[0013] Preferably, the output pin of the combustible gas sensor is connected with the signal input pin of the CPU chip through a filter circuit; and the input pin of the combustible gas sensor is connected with the monitoring control pin of the CPU chip through a monitoring MOS tube.

[0014] Preferably, the power supply module further comprises a zero calibration control module, the zero calibration control module comprises a control unit and a zero calibration unit, the control unit is connected with the zero calibration I / O pin of the CPU chip, and the zero calibration unit is connected between the zero calibration I / O pin and the signal input pin of the CPU chip.

[0015] Preferably, the zero calibration unit comprises a zero calibration MOS tube of NMOS type, the gate of the zero calibration MOS tube is connected with the zero calibration I / O pin of the CPU chip, and the drain thereof is connected with the signal input pin of the CPU chip through the filter circuit and a first resistor.

[0016] Preferably, the filter circuit comprises a second resistor and a filter capacitor, the two ends of the second resistor are connected between the first resistor and the signal input pin of the CPU chip, and one end of the filter capacitor is connected between the second resistor and the signal input pin of the CPU chip, and the other end thereof is grounded.

[0017] Preferably, the monitoring MOS tube is of NMOS type, the gate of the monitoring MOS tube is connected with the monitoring control pin of the CPU chip, the drain thereof is connected with the input pin of the combustible gas sensor, and the source thereof is grounded.

[0018] The utility model discloses a beneficial effect lies in: the utility model proposes a kind of low-power gas monitoring early warning system, the chip used by each module is all selected low-power chip, the CPU chip is powered by the opening and closing of the switch unit to control the power supply module to monitor module power supply, further reduce the overall power consumption of monitoring system, prolong the endurance time of battery;It can also communicate with the external monitoring platform immediately when alarm event occurs, so that the user can make corresponding disposal in time, reduce the security risk. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] The technical scheme protected by the utility model is specifically described below in connection with drawings.

[0022] Please refer to Figure 1 The utility model discloses a kind of low-power gas monitoring early warning system, including processing module, monitoring module, alarm module and power supply module;The monitoring module and the alarm module are connected with the processing module, the processing module is communicated with external monitoring platform;External power supply is connected with the processing module, the monitoring module by the power supply module;Specifically, the processing module includes CPU chip, the monitoring module includes combustible gas sensor, and the power supply module includes voltage stabilizing chip;The switch unit includes hibernate MOS tube;In this embodiment, external power supply such as lithium battery, the processing module, monitoring module and alarm module are provided with stable 3.3V voltage by the power supply module, can also reduce energy consumption to a certain extent, and the model of the combustible gas sensor is GM-4028, it is a kind of low-power chip for monitoring the content of propane;The CPU chip selects RJM88L003F6P6 this low-power chip, can receive the signal transmitted by the combustible gas sensor, if exceed set value, not only can output control signal to the alarm module, but also can communicate with communication module in URAT mode, such as WiFi mode, monitoring data and alarm information are transmitted to external cloud monitoring platform, so that user can intervene processing in time.

[0023] The utility model discloses in order to realize low-power, not only combustible gas sensor and CPU chip select low-power chip, the CUP chip can also be powered on or off by the switch unit, under certain conditions, so that monitoring module is in hibernate, under the condition of timing or other trigger, wake up again, further reduce energy consumption.

[0024] Specifically, please refer toFigure 2 The sleep MOS Q3 is of NMOS type, the gate of the sleep MOS Q3 is connected with the sleep control pin P0.5 of the CPU chip U1, and the CPU chip U1 outputs a CLOSE control signal to the gate of the sleep MOS Q3; the drain of the sleep MOS Q3 is connected with a 3.7V power supply, and the source thereof is grounded; and the enable end CE and the input end VIN of the voltage stabilizing chip U3 are connected with an external power supply; the CPU chip U1 outputs a CLOSE control signal to the gate of the sleep MOS Q3, when the CLOSE control signal is at a high level, the sleep MOS Q3 is turned on, the power supply chip U3 cannot be started, and thus cannot supply power to other modules, so that the monitoring system is in a sleep state; in one of the embodiments, the CPU chip can output a low level to the sleep MOS Q3 at a set time interval, so that the sleep MOS Q3 is cut off, and at this time, an external lithium battery can activate the power supply chip U3, so as to wake up other modules to continue working.

[0025] In order to ensure the stability of the power supply, the power supply module further comprises a first noise reduction capacitor C5, one end of the first noise reduction capacitor C5 is connected between the input end of the voltage stabilizing chip and the external power supply, and the other end thereof is grounded. Meanwhile, the power supply module further comprises a second noise reduction capacitor C1 and a third noise reduction capacitor C8, one end of the parallel connection of the second noise reduction capacitor C1 and the third noise reduction capacitor C8 is connected with the output end of the voltage stabilizing chip U3, and the other end is grounded.

[0026] In order to ensure the accuracy of the monitoring signal, the output pin RS1 of the combustible gas sensor U2 is connected with the signal input pin AIN 5 of the CPU chip U1 through a filter circuit; and the input pin RH2 of the combustible gas sensor U2 is connected with the monitoring control pin P0.3 of the CPU chip U1 through a monitoring MOS Q1.

[0027] Specifically, the monitoring MOS Q1 is of NMOS type, the gate of the monitoring MOS Q1 is connected with the monitoring control pin P0.3 of the CPU chip, the drain thereof is connected with the input pin RH2 of the combustible gas sensor, and the source thereof is grounded; the CPU chip U1 outputs a corresponding zero calibration signal to the combustible gas sensor U2 through the monitoring control pin P0.3, so that the combustible gas sensor resets the heating voltage.

[0028] In addition, the utility model further includes zero calibration control module, zero calibration control module includes control unit and zero calibration unit, the control unit can be external button, it is connected with zero calibration I / O pin P1.4 of CPU chip;Zero calibration unit is connected between zero calibration I / O pin P1.4 and signal input pin AIN5 of CPU chip.

[0029] Specifically, the zero calibration unit comprises a zero calibration MOS transistor Q2 of NMOS type, the gate of the zero calibration MOS transistor is connected with a zero calibration I / O pin P1.4 of the CPU chip, and the drain thereof is connected with a signal input pin AIN5 of the CPU chip through the filter circuit and the first resistor R8, that is, the zero point of the combustible gas sensor is set through the zero calibration unit to ensure the accurate measurement of the gas concentration, and the setting of the first resistor R8 and the filter circuit avoids the damage of excessive current to the button or the CPU chip.

[0030] Specifically, the filter circuit comprises a second resistor R9 and a filter capacitor C2, the two ends of the second resistor R9 are connected between the first resistor R8 and the signal input pin AIN5 of the CPU chip, one end of the filter capacitor C2 is connected between the second resistor R9 and the signal input pin AIN5 of the CPU chip, and the other end thereof is grounded.

[0031] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent flow transformation obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A low power gas monitoring and warning system, characterized in that, The device comprises a processing module, a monitoring module, an alarm module and a power supply module; the monitoring module and the alarm module are connected with the processing module, and the processing module communicates with an external monitoring platform; an external power supply is connected with the processing module and the monitoring module through the power supply module; The processing module comprises a CPU chip, the monitoring module comprises a combustible gas sensor, and the power supply module comprises a voltage stabilizing chip; a switch unit comprises a sleep MOS tube; the CPU chip receives signals transmitted by the combustible gas sensor and outputs control signals to the alarm module; the CPU chip opens and closes the power supply module through the switch unit.

2. The low power gas monitoring and warning system according to claim 1, wherein, The sleep MOS tube is of NMOS type, the gate of the sleep MOS tube is connected with a sleep control pin of the CPU chip, the drain of the sleep MOS tube is connected with a power supply, and the source of the sleep MOS tube is grounded; an enable end and an input end of the voltage stabilizing chip are connected with an external power supply.

3. The low power gas monitoring and warning system of claim 2, wherein, The power supply module further comprises a first noise reduction capacitor, one end of the first noise reduction capacitor is connected between the input end of the voltage stabilizing chip and the external power supply, and the other end of the first noise reduction capacitor is grounded.

4. The low power gas monitoring and warning system of claim 2, wherein, The power supply module further comprises a second noise reduction capacitor and a third noise reduction capacitor, one end of the second noise reduction capacitor and the third noise reduction capacitor connected in parallel is connected with an output end of the voltage stabilizing chip, and the other end of the second noise reduction capacitor and the third noise reduction capacitor connected in parallel is grounded.

5. The low power gas monitoring and warning system of claim 1, wherein, An output pin of the combustible gas sensor is connected with a signal input pin of the CPU chip through a filter circuit; an input pin of the combustible gas sensor is connected with a monitoring control pin of the CPU chip through a monitoring MOS tube.

6. The low power gas monitoring and warning system of claim 5, wherein, The device further comprises a zero calibration control module, the zero calibration control module comprises a control unit and a zero calibration unit, the control unit is connected with a zero calibration I / O pin of the CPU chip, and the zero calibration unit is connected between the zero calibration I / O pin and a signal input pin of the CPU chip.

7. The low power gas monitoring and warning system of claim 6, wherein, The zero calibration unit comprises a zero calibration MOS tube of NMOS type, the gate of the zero calibration MOS tube is connected with the zero calibration I / O pin of the CPU chip, and the drain of the zero calibration MOS tube is connected with the signal input pin of the CPU chip through a first resistor and the filter circuit.

8. The low power gas monitoring and warning system of claim 7, wherein, The filter circuit comprises a second resistor and a filter capacitor, the second resistor is connected between the first resistor and the signal input pin of the CPU chip, and one end of the filter capacitor is connected between the second resistor and the signal input pin of the CPU chip, and the other end of the filter capacitor is grounded.

9. The low power gas monitoring and warning system of claim 5, wherein, The monitoring MOS tube is of NMOS type, the gate of the monitoring MOS tube is connected with a monitoring control pin of the CPU chip, the drain of the monitoring MOS tube is connected with an input pin of the combustible gas sensor, and the source of the monitoring MOS tube is grounded.

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