CN214503606U - Wireless module of combustible gas detector - Google Patents
Wireless module of combustible gas detector Download PDFInfo
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- CN214503606U CN214503606U CN202023344479.0U CN202023344479U CN214503606U CN 214503606 U CN214503606 U CN 214503606U CN 202023344479 U CN202023344479 U CN 202023344479U CN 214503606 U CN214503606 U CN 214503606U
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Abstract
The utility model discloses a combustible gas detector wireless module, including combustible gas sensor, controller, wireless transceiver module and human-computer interaction module, the gaseous receiving terminal that detects of combustible gas sensor signal output part connection director, the inside signal transceiver end of unlimited transceiver module is connected to controller wireless signal transceiver end. The utility model provides a combustible gas alarm signal wireless transmission range is far away, and the penetrating power is strong and possess the wireless module of combustible gas detector who falls the electric detection.
Description
Technical Field
The utility model belongs to the technical field of combustible gas monitoring technique and specifically relates to a wireless module of combustible gas detector is related to.
Background
At present, a household combustible gas alarm in the industry basically adopts a local off-line working mode, namely, after gas exceeds standard, equipment uses a buzzer to alarm and inform a user. And a part of wireless alarms are inserted with SIM cards and use a mobile phone cellular network to report data.
The non-networking combustible gas alarm is only suitable for scenes where a user is near an installation position, and if the user is not at home, the alarm message cannot be effectively transmitted. The non-networking alarm is only suitable for household use and cannot be subjected to centralized management.
The wireless alarm for data reporting by using a cellular network of a mobile phone needs to be used with an SIM card, the traffic charges of operators can continuously generate use cost, and for some complex indoor environments: such as hotel kitchen, etc., it is inevitable that wireless data reporting fails due to poor signal quality of the mobile phone network.
The invention relates to a combustible gas detector which is named as a combustible gas detector in China patent publication No. CN207541766U, published 2018, 06 and 26.A raised operation panel is arranged on the upper surface of the detector shell, an alarm indicating device and a detector self-checking button are arranged on the operation panel, combustible gas inlet and outlet holes are respectively formed in two side walls penetrating through the detector shell, a suspension groove and a battery groove are formed in the lower surface of the detector, a suspension device is arranged corresponding to the suspension groove, a battery is detachably mounted in the battery groove, a combustible gas monitoring device is arranged in the detector shell, and the combustible gas monitoring device is also connected with a terminal wire and a power wire which penetrate through the lower side wall of a shell and extend outwards; the automatic closing of the gas valve can be realized through a signal wire. The application uses battery power, and it is bulky and costly, and signal transmission range is little, and the penetrability is poor.
Disclosure of Invention
The utility model relates to an overcome the problem that the wireless transmission range of combustible gas alarm signal of prior art is nearly just not possess the power down detection, provide a wireless transmission range of combustible gas alarm signal far away, the penetrating power is strong and possess the wireless module of combustible gas detector who falls the power down detection.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a technical scheme that its technical problem adopted is: the utility model provides a combustible gas detector wireless module, includes combustible gas sensor, controller, wireless transceiver module and human-computer interaction module, and combustible gas sensor signal output part connects the gaseous receiving terminal that detects of controller, and the inside signal transceiver end of unlimited transceiver module is connected to controller wireless signal transceiver end. The man-machine interaction module signal receiving and transmitting end is connected with the man-machine signal receiving and transmitting end of the controller. The invention combines the low-power-consumption wide-area Internet of things technology, solves the problem that the data of the traditional gas alarm cannot be uploaded, solves the problem that centralized management cannot be realized, and solves the problems that the flow rate expense of the common wireless alarm is high and the transmission quality is limited by the installation environment.
Preferably, the wireless module of the combustible gas detector further comprises a power management circuit, the power management circuit comprises a DC-DC converter and a power failure detection circuit, the power input end of the DC-DC converter is connected with the power supply end of the combustible gas sensor, the power output end of the DC-DC converter is connected with the power input end of the controller, the power supply end of the combustible gas sensor is connected with the signal input end of the power failure detection circuit, and the signal output end of the power failure detection circuit is connected with the power failure signal receiving end of the controller. The DC-DC converter is connected with the power supply end of the combustible gas sensor, the power supply end of the combustible gas sensor is a power converter, the power supply end of the combustible gas sensor outputs 12V current to the combustible gas sensor and the DC-DC converter, the DC-DC converter converts voltage and current suitable for being used by the controller, and the power failure detection circuit gives an alarm through the power failure detection circuit when the combustible gas sensor cannot output electric energy, so that the controller can obtain a power failure signal, and then alarming and related processing actions are carried out.
Preferably, the power management circuit further comprises an electric energy storage, an electric energy input end of the electric energy storage is connected with an electric energy output end of the DC-DC converter, an electric energy input end of the electric energy storage is connected with an electric energy input end of the controller, and an electric energy detection end of the electric energy storage is connected with a signal input end of the power failure detection circuit. The electric energy storage can obtain electric energy from the DC-DC converter, store the electric energy, and release the stored electric energy to supply power for the combustible gas sensor and the controller when the DC-DC converter can not provide the electric energy.
Preferably, the electric energy storage is a super capacitor, an electric energy input end of the super capacitor is connected with an electric energy output end of the DC-DC converter, an electric energy input end of the super capacitor is connected with an electric energy input end of the controller, and an electric energy detection end of the super capacitor is connected with a signal input end of the power failure detection circuit. The power down warning function can also be implemented by using a built-in battery, but the battery cost is high. If a non-rechargeable battery is used, the power failure warning function cannot be used continuously after the electric quantity is exhausted, if the rechargeable battery is used, hardware cost needs to be increased when a power management circuit is added, and the scheme with a good comprehensive effect is achieved by selecting the super capacitor.
Preferably, the human-computer interaction module comprises a key and a prompting lamp, the key signal output end is connected with the key signal receiving end of the controller, and the prompting lamp driving end is connected with the prompting signal output end of the controller. Personnel can be through button input signal to the controller, and the controller is through the warning light to personnel output signal.
Preferably, the wireless transceiver module is a long-range wireless transceiver module. The technical scheme that the remote wireless transceiving module can replace a mobile phone cellular network to report data is adopted, and the traffic charge is saved.
Preferably, the power-down detection circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R9 and a MOS transistor Q1, wherein an input end of the resistor R5 serves as a signal input end of the power-down detection circuit, an output end of the resistor R5 is connected with an input end of the resistor R6, an output end of the resistor R6 is grounded, an output end of the resistor R5 is connected with an input end of the resistor R7, an output end of the resistor R7 is connected with a gate of the MOS transistor Q1, a source of the MOS transistor Q1 is grounded, a drain of the MOS transistor Q1 is connected with a first end of the resistor R4, a second end of the resistor R4 is connected with a reference voltage source, and a drain of the MOS transistor Q1 serves as a signal output end of the power-down detection circuit.
When the power supply end of the combustible gas sensor normally supplies power, the signal input end of the power failure detection circuit is 12V, Vg is 6V after being subjected to voltage division by R5R 6, Vs is connected with a reference voltage source VCC _3.3 and is 3.3V, Vg is greater than Vs, the MOS tube is turned off, and VDETECT is high level 3.3V; when the power supply end of the combustible gas sensor is powered down, the power down detection circuit signal input end VCC is 0V, Vg is 0V, VS is 3.3V, Vg is VS, the MOS tube is conducted, and VDETECT is low level 0V; the MCU can execute power failure alarm after detecting the level change of the VDETECT, and the power failure alarm function is realized.
Therefore, the utility model discloses following beneficial effect has: (1) the invention combines the low-power consumption wide area Internet of things technology, solves the problem that the data of the traditional gas alarm cannot be uploaded, solves the problem that centralized management cannot be realized, and solves the problems that the flow rate expense of the common wireless alarm is high and the transmission quality is limited by the installation environment; (2) the DC-DC converter is connected with an external mains supply to convert voltage and current suitable for the controller and the combustible gas sensor, and the power failure detection circuit gives an alarm through the power failure detection circuit when the DC-DC converter cannot output electric energy, so that the controller can obtain a power failure signal, and alarm and related processing actions are carried out; (3) the electric energy storage can obtain electric energy from the DC-DC converter and store the electric energy, and when the DC-DC converter can not provide the electric energy, the electric energy storage releases the stored electric energy to supply power for the combustible gas sensor and the controller; (4) the technical scheme that the remote wireless transceiving module can replace a mobile phone cellular network for data reporting is adopted, so that the traffic charge is saved; (5) when the power supply end of the combustible gas sensor normally supplies power, the signal input end of the power failure detection circuit is 12V, Vg is 6V after being subjected to voltage division by R5R 6, Vs is connected with a reference voltage source VCC _3.3 and is 3.3V, Vg is greater than Vs, the MOS tube is turned off, and VDETECT is high level 3.3V; when the power supply end of the combustible gas sensor is powered down, the power down detection circuit signal input end VCC is 0V, Vg is 0V, VS is 3.3V, Vg is VS, the MOS tube is conducted, and VDETECT is low level 0V; the MCU can execute power failure alarm after detecting the level change of the VDETECT, so that the power failure alarm function is realized, a controller can obtain a power failure signal, and the current power failure state is sensed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is the utility model discloses a fall electric detection circuit schematic diagram
In the figure: 1. the device comprises a combustible gas sensor, 2 parts of a controller, 3 parts of a wireless transceiving module, 4 parts of a man-machine interaction module, 41 parts of a key, 42 parts of a prompting lamp, 5 parts of a power management circuit, 51 parts of a DC-DC converter, 52 parts of a power failure detection circuit and 53 parts of an electric energy storage.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Example (b): a combustible gas detector wireless module is shown in figure 1 and comprises a combustible gas sensor 1, a controller 2, a wireless transceiving module 3, a man-machine interaction module 4 and a power management circuit 5, wherein a signal output end of the combustible gas sensor is connected with a gas detection receiving end of the controller, and a wireless signal transceiving end of the controller is connected with a signal transceiving end inside an infinite transceiving module. The power management circuit comprises a DC-DC converter 51 and a power failure detection circuit 52, wherein the electric energy input end of the DC-DC converter is connected with the electric energy supply end of the combustible gas sensor, the electric energy output end of the DC-DC converter is connected with the electric energy input end of the controller, the electric energy supply end of the combustible gas sensor is connected with the signal input end of the power failure detection circuit, and the signal output end of the power failure detection circuit is connected with the power failure signal receiving end of the controller. The power management circuit further comprises an electric energy storage 53, an electric energy input end of the electric energy storage is connected with an electric energy output end of the DC-DC converter, an electric energy input end of the electric energy storage is connected with an electric energy input end of the controller, and an electric energy detection end of the electric energy storage is connected with a signal input end of the power failure detection circuit. The man-machine interaction module comprises a key 41 and a prompting lamp 42, wherein the key signal output end is connected with the key signal receiving end of the controller, and the prompting lamp driving end is connected with the prompting signal output end of the controller. The wireless transceiver module is a remote wireless transceiver module. As shown in fig. 2, the power-down detection circuit includes a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R9 and a MOS transistor Q1, an input terminal of the resistor R5 serves as a signal input terminal of the power-down detection circuit, an output terminal of the resistor R5 is connected to an input terminal of the resistor R6, an output terminal of the resistor R6 is grounded, an output terminal of the resistor R5 is connected to an input terminal of the resistor R7, an output terminal of the resistor R7 is connected to a gate of the MOS transistor Q1, a source of the MOS transistor Q1 is grounded, a drain of the MOS transistor Q1 is connected to a first terminal of the resistor R4, a second terminal of the resistor R4 is connected to a reference voltage source, and a drain of the MOS transistor Q1 serves as a signal output terminal of the power-down detection circuit. The VDETECT is connected with the IO port of the controller; the controller can be an HC32L110 ultra-low power consumption singlechip.
Wireless transceiver module adopts LoRaWAN communication module, its communication frequency: 470MHz-510MHz, working voltage 2.8-3.3V, maximum transmitting power: 19dBm, receive sensitivity-136 dBm (@ SF12), transmit current 120mA, receive current 13mA, sleep current 2 uA.
The DC-DC converter provides 3.6V power for the 12V DC, the DC-DC converter to the controller and the LoRaWAN module. Input voltage range: 5-45V, quiescent current: 14uA, load capacity: 600 mA. The power supply ripple range meets the requirements of the post-stage equipment.
A power failure detection circuit is built by using an MOS (metal oxide semiconductor) tube, and a 12V input is connected with a triode gate after voltage division and current limitation. The source stage and the drain stage are connected with a GPIO port of the single chip microcomputer and a 3.6V level reference, the MOS tube acts after power failure, and the GPIO port starts to carry out power failure alarm reporting after detecting level jump.
The electric energy storage is a super capacitor, an electric energy input end of the super capacitor is connected with an electric energy output end of the DC-DC converter, an electric energy input end of the super capacitor is connected with an electric energy input end of the controller, and an electric energy detection end of the super capacitor is connected with a signal input end of the power failure detection circuit. Electrostatic capacity of supercapacitor: 1.5F, rated voltage 5.5V, ESR (& lt 1kHz)500m omega. The power output end of the DC-DC converter is combined with a 5.5V super capacitor to provide a standby power supply during power failure. The rated voltage of the super capacitor is higher than the normal working voltage, the charging is carried out to 3.6V during the live working, and the LoRaWAN module stops working when the power supply is disconnected and continuously discharges to the lowest 2.5V.
The utility model discloses a super capacitor continuation of journey electric quantity calculated data as follows:
maximum communication current of the system: 135mA
Receiving the working current of the state: 13mA
Normal operating current: 2.5mA
Sending time: about 1.35s (SF12,32 bytes of data)
The system single communication power consumption Q ═ I × t ═ 135mA × 1.3s (transmit) +13mA × 1.3s (receive) +2.5mA × 1s (RXDelay _1) ═ 0.19C
Normal operation 60s power consumption Q ═ It ═ 25mA ═ 60s ═ 0.15C
Reporting 5 times of alarm power consumption Q ═ 0.19 ═ 5+0.15 ═ 1.12C
Reporting 3 times of alarm power consumption Q ═ 0.19 ═ 3+0.15 ═ 0.73C
1.5F capacitance Q ═ Δ U ═ C ═ 0(3.6-2.5) × 1.5 ═ 1.65C
The 1.5F super capacitor can support the work of the system after power failure, and has about 50% of the loss attenuation and high-low temperature attenuation of the device with the surplus power supply.
So it is possible to use a 1.5F super capacitor.
The power down warning function can also be implemented by using a built-in battery, but the battery cost is high. The electrical energy storage may also be an energy storage battery.
The man-machine interaction module signal receiving and transmitting end is connected with the man-machine signal receiving and transmitting end of the controller. The invention combines the low-power-consumption wide-area Internet of things technology, solves the problem that the data of the traditional gas alarm cannot be uploaded, solves the problem that centralized management cannot be realized, and solves the problems that the flow rate expense of the common wireless alarm is high and the transmission quality is limited by the installation environment.
And after external power failure is detected, reporting power failure warning information for 5 times at most at a random moment within 60s by using a confirmation frame, and stopping reporting after receiving a server response.
The DC-DC converter is connected with the power supply end of the combustible gas sensor, the power supply end of the combustible gas sensor is a power converter, the power supply end of the combustible gas sensor outputs 12V current to the combustible gas sensor and the DC-DC converter, the DC-DC converter converts voltage and current suitable for being used by the controller, the power failure detection circuit gives an alarm through the power failure detection circuit when the combustible gas sensor cannot output electric energy, so that the controller can obtain a power failure signal, the electric energy storage device can obtain the electric energy from the DC-DC converter for alarming and related processing actions and stores the electric energy, and when the DC-DC converter cannot provide the electric energy, the electric energy storage device releases the stored electric energy to supply power for the combustible gas sensor and the controller.
If a non-rechargeable battery is used, the power failure warning function cannot be used continuously after the electric quantity is exhausted, if the rechargeable battery is used, hardware cost needs to be increased when a power management circuit is added, and the scheme with a good comprehensive effect is achieved by selecting the super capacitor.
Personnel can be through button input signal to the controller, and the controller is through the warning light to personnel output signal.
The technical scheme that the remote wireless transceiving module can replace a mobile phone cellular network to report data is adopted, and the traffic charge is saved.
When the power supply end of the combustible gas sensor normally supplies power, the signal input end of the power failure detection circuit is 12V, Vg is 6V after being subjected to voltage division by R5R 6, Vs is connected with a reference voltage source VCC _3.3 and is 3.3V, Vg is greater than Vs, the MOS tube is turned off, and VDETECT is high level 3.3V; when the power supply end of the combustible gas sensor is powered down, the power down detection circuit signal input end VCC is 0V, Vg is 0V, VS is 3.3V, Vg is VS, the MOS tube is conducted, and VDETECT is low level 0V; the MCU can execute power failure alarm after detecting the level change of the VDETECT, so that the power failure alarm function is realized, a controller can obtain a power failure signal, and the current power failure state is sensed.
Claims (8)
1. The wireless module of the combustible gas detector is characterized by comprising a combustible gas sensor, a controller, a wireless transceiving module and a man-machine interaction module, wherein the signal output end of the combustible gas sensor is connected with the gas detection receiving end of the controller, and the wireless signal transceiving end of the controller is connected with the signal transceiving end inside the wireless transceiving module.
2. The wireless module of claim 1, wherein the human-computer interaction module signal transceiver end is connected to the human-computer signal transceiver end of the controller.
3. The wireless module of claim 1, further comprising a power management circuit, wherein the power management circuit comprises a DC-DC converter and a power down detection circuit, the power input terminal of the DC-DC converter is connected to the power supply terminal of the combustible gas sensor, the power output terminal of the DC-DC converter is connected to the power input terminal of the controller, the power supply terminal of the combustible gas sensor is connected to the signal input terminal of the power down detection circuit, and the signal output terminal of the power down detection circuit is connected to the signal receiving terminal of the controller.
4. The wireless module as claimed in claim 1 or 2, wherein the power management circuit further comprises an electric energy accumulator, an electric energy input end of the electric energy accumulator is connected with the electric energy output end of the DC-DC converter, an electric energy input end of the electric energy accumulator is connected with the electric energy input end of the controller, and an electric energy detection end of the electric energy accumulator is connected with the signal input end of the power failure detection circuit.
5. The wireless module as claimed in claim 1, wherein the electric energy storage device is a super capacitor, the electric energy input end of the super capacitor is connected with the electric energy output end of the DC-DC converter, the electric energy input end of the super capacitor is connected with the electric energy input end of the controller, and the electric energy detection end of the super capacitor is connected with the signal input end of the power failure detection circuit.
6. The wireless module of claim 1, wherein the human-computer interaction module comprises a key and a prompting lamp, the key signal output end is connected with the key signal receiving end of the controller, and the driving end of the prompting lamp is connected with the prompting signal output end of the controller.
7. The wireless module of claim 1, wherein the wireless transceiver module is a long-range wireless transceiver module.
8. The wireless module of a combustible gas detector as claimed in claim 1, wherein the power-down detection circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R9 and a MOS transistor Q1, wherein an input terminal of the resistor R5 is used as a signal input terminal of the power-down detection circuit, an output terminal of the resistor R5 is connected with an input terminal of the resistor R6, an output terminal of the resistor R6 is grounded, an output terminal of the resistor R5 is connected with an input terminal of the resistor R7, an output terminal of the resistor R7 is connected with a gate of the MOS transistor Q1, a source of the MOS transistor Q1 is grounded, a drain of the MOS transistor Q1 is connected with a first terminal of the resistor R4, a second terminal of the resistor R4 is connected with a reference voltage source, and a drain of the MOS transistor Q1 is used as a signal output terminal of the power-down detection circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023344479.0U CN214503606U (en) | 2020-12-31 | 2020-12-31 | Wireless module of combustible gas detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023344479.0U CN214503606U (en) | 2020-12-31 | 2020-12-31 | Wireless module of combustible gas detector |
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| CN214503606U true CN214503606U (en) | 2021-10-26 |
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| CN202023344479.0U Active CN214503606U (en) | 2020-12-31 | 2020-12-31 | Wireless module of combustible gas detector |
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