Gas leakage alarm

Abstract

The utility model discloses a gas leakage alarm. The gas leakage alarm comprises a bottom plate, a shell and a joint, the bottom plate is used for bearing the circuit board and the bottom shell, the circuit board is arranged on the bottom plate, and a power module, a gas sensor, an environment sensor, a CAN communication module and an MCU are arranged on the circuit board; the gas sensor and the environment sensor are electrically connected with the MCU, and the CAN communication module is electrically connected with the MCU and is connected with a vehicle body CAN bus through a wire; the shell is used for bearing the circuit board and each module, and the shell is detachably connected with the bottom plate; the gas sensor and the environment sensor are integrated on the circuit board, so that the number of wire harnesses can be reduced, the condition of electric sparks can be avoided through one-time printing and welding, and the gas detection precision can be improved; the CAN communication module is integrated on the circuit board, so that direct communication between the product and a trip computer can be more clearly and directly checked out and even directly marked out a leakage point when a fault occurs, and the reliability of fault discovery of a driver is improved by utilizing the actual situation of the vehicle and a buzzer of the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electronics, and more specifically, it relates to a gas leakage alarm. Background Art

[0002] Gas-powered vehicles are automotive products powered by natural gas. Compared with the constantly rising oil prices, the price of natural gas is relatively stable. In addition, under the same vehicle configuration and operating conditions, gas-powered vehicles can also save a large amount of fuel costs per kilometer compared with diesel vehicles, with better economy.

[0003] The pipelines of gas-powered vehicles are complex and prone to gas leakage, leaving serious hidden dangers to the safety of natural gas vehicles; in order to quickly detect leaks and carry out emergency treatment, it is necessary to detect the points prone to leakage.

[0004] The traditional gas leakage alarm system consists of a gas sensor and an alarm, with complex body wiring and high system cost. Content of the Utility Model

[0005] The purpose of the utility model is to provide a gas leakage alarm, a gas leakage detection alarm that can reduce in-vehicle wiring.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a gas leakage alarm, including a bottom plate, a housing, and a connector.

[0007] The bottom plate is used to carry the circuit board and the bottom case. A circuit board is arranged on the bottom plate, and a power module, a gas sensor, an environmental sensor, a CAN communication module, and an MCU are arranged on the circuit board.

[0008] The gas sensor and the environmental sensor are respectively electrically connected to the MCU, the CAN communication module is electrically connected to the MCU and wire-connected to the vehicle body CAN bus.

[0009] The housing is used to carry the circuit board and each module, and the housing is detachably connected to the bottom plate.

[0010] The connector is used for connecting the circuit board to the CAN bus.

[0011] The utility model is further arranged as: the housing is a box structure with an opening on one side of a rectangle, and contact holes are provided on the side wall of the housing.

[0012] The utility model is further arranged as: a number of contact holes arranged in a rectangular array are provided on the housing.

[0013] The present utility model is further configured such that: a fixing hole is formed on one side of the bottom plate, and an open hole is provided on the side of the bottom plate away from the fixing hole.

[0014] The present utility model is further configured such that: the gas sensor is a methane sensor.

[0015] The present utility model is further configured such that: the environmental sensor is a temperature sensor.

[0016] In summary, the present utility model has the following beneficial effects: integrating the gas sensor and the environmental sensor on the circuit board can reduce the number of wire harnesses, and the circuit board printed and welded at one time will not have the situation of electric sparks. It can also improve the detection accuracy of gas. Integrating the CAN communication module on the circuit board to directly communicate the product with the vehicle computer can be more clearly and directly detected when a fault occurs and even directly mark the leakage point. Utilizing the display of the vehicle's own instrument and the vehicle's own buzzer improves the reliability of the driver to discover the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the device in an embodiment of the present utility model;

[0018] Figure 2 is a perspective view of the device from another perspective in an embodiment of the present utility model;

[0019] Figure 3 is a front view of the device in an embodiment of the present utility model;

[0020] Figure 4 is a left view schematic diagram of the device in an embodiment of the present utility model;

[0021] Figure 5 is a bottom view schematic diagram of the device in an embodiment of the present utility model;

[0022] Figure 6 is a top view schematic diagram of the device in an embodiment of the present utility model;

[0023] Figure 7 is a schematic diagram of the connector of the device in an embodiment of the present utility model

[0024] Figure 8 is a block diagram of the module in an embodiment of the present utility model.

[0025] In the figure:

[0026] 1, bottom plate; 11, fixing hole; 12, open hole; 2, housing; 21, contact hole; 3, connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that if terms such as "first", "second", etc. are involved in the description and claims of the present utility model and the above-mentioned accompanying drawings, they are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present utility model described herein. In addition, if terms such as "comprising" and "having" and any variations thereof are involved, the intention is to cover non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0029] In addition, in the present utility model, if terms such as "installation", "setting", "provided with", "connection", "connected", "socketed", etc. are involved, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will detail the present utility model with reference to the accompanying drawings and in combination with the embodiments.

[0031] The following will further elaborate on the present utility model with reference to the attached Figures 1-6 drawings.

[0032] Embodiment

[0033] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 shown, a gas leakage alarm includes a bottom plate 1, a housing 2, and a connector 3.

[0034] The bottom plate 1 is used to carry the circuit board and the bottom shell. A circuit board is arranged on the bottom plate 1, and a power module, a crystal oscillator module, a reset module, a methane detection module, a temperature detection module, a CAN communication module, an LED driving module, and an MCU are arranged on the circuit board.

[0035] The power module, the crystal oscillator module, the reset module, the methane detection module, the temperature detection module, the CAN communication module, the LED driving module, and the MCU are all soldered on the circuit board. Therefore, integrating multiple circuits into the circuit board can effectively reduce the possible electric spark situation caused by wiring.

[0036] The gas sensor and the environmental sensor are respectively electrically connected to the MCU. The CAN communication module is electrically connected to the MCU and is connected to the vehicle body CAN bus wire.

[0037] The housing 2 is used to carry the circuit board and each module. The housing 2 is detachably connected to the bottom plate 1.

[0038] The connector 3 is used for connecting the circuit board to the CAN bus. Several pins are arranged inside the connector 3.

[0039] In this solution, at least four pins are arranged inside the connector 3. PIN1 is CAN-L; PIN2 is CAN-H; PIN3 is GND; PIN4 is VIN.

[0040] The housing 2 is a box structure with a rectangular shape and one side open. A contact hole 21 is opened on the side wall of the housing 2.

[0041] Several contact holes 21 arranged in a rectangular array are opened on the housing 2. The contact holes 21 are through holes to facilitate the entry of gas leakage into the housing 2.

[0042] A fixing hole 11 is opened on one side of the bottom plate 1. An open hole 12 is arranged on the side of the bottom plate 1 far from the fixing hole 11. The settings of the fixing hole 11 and the open hole 12 can fix the bottom plate 1 at the designated position on the vehicle body more stably.

[0043] In this solution, the gas sensor can be a methane sensor.

[0044] In this solution, the environmental sensor can be a temperature sensor.

[0045] Power module: Convert the vehicle power voltage into the voltages required by each module control chip and the MCU.

[0046] Crystal oscillator module: Provide an accurate chip operation clock signal.

[0047] Reset module: Provide a reset timing signal with a time difference from the main chip to ensure the normal startup of the main chip.

[0048] Methane detection sensor: The methane gas sensor converts the methane concentration in the air into a resistance value and transmits it to the MCU-AD port according to the circuit voltage division value.

[0049] Temperature detection sensor: A thermistor is connected in series with a fixed resistor, and the circuit voltage division value is extracted and given to the MCU-AD port.

[0050] CAN communication module: A dedicated CAN communication interface chip is used to transmit the gas alarm information to the vehicle body CAN bus network.

[0051] LED driver module: A triode is used to control the negative electrode of the LED to achieve the control of the LED on and off.

[0052] When checking for leaks, the location where the LED flashes quickly is the leak point.

[0053] In this solution, the functions of the methane sensor, temperature sensor, and alarm are integrated, and the display and buzzer of the existing vehicle instrument are used for alarm. The integrated design can save the vehicle body wiring harness, optimize the wiring scheme, and reduce the system weight at the same time. Because the reduction of the wiring harness saves the system cost, and the system reliability is also improved after the above settings.

[0054] Working principle: Integrating gas sensors and environmental sensors on the circuit board can reduce the number of wiring harnesses, and the circuit board with one-time printing and soldering will not have the situation of electric sparks, and can also improve the gas detection accuracy. The CAN communication module integrated on the circuit board directly communicates this product with the vehicle computer, which can be more clearly and directly detected when a fault occurs and even directly mark the leak point. Using the display of the vehicle's own instrument and the vehicle's own buzzer improves the reliability of the driver to discover faults.

[0055] It should be noted that all the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0056] In addition, the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure content of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the specification and drawings of the present invention are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gas leak alarm, characterized in that: A bottom plate (1) for carrying a circuit board and a bottom shell, wherein the bottom plate (1) is provided with a circuit board, and the circuit board is provided with a power module, a gas sensor, an environmental sensor, a CAN communication module and an MCU; The gas sensor and the environment sensor are electrically connected to the MCU respectively, and the CAN communication module is electrically connected to the MCU and connected to the vehicle body CAN bus wire; A housing (2) for carrying the circuit board and various modules, the housing (2) being detachably connected to the base plate (1); A connector (3) is used to connect the circuit board to a CAN bus.

2. A gas leak alarm according to claim 1, characterized in that: The shell (2) is a rectangular box structure with one side open, and a contact hole (21) is provided on the side wall of the shell (2).

3. A gas leak alarm according to claim 2, characterized in that: The housing (2) is provided with a plurality of contact holes (21) arranged in a rectangular array.

4. A gas leak alarm according to claim 1, characterized in that: A fixing hole (11) is provided on one side of the bottom plate (1), and an open hole (12) is provided on a side of the bottom plate (1) away from the fixing hole (11).

5. A gas leak alarm according to claim 1, characterized in that: The gas sensor is a methane sensor.

6. A gas leak alarm according to claim 1, characterized in that: The environmental sensor is a temperature sensor.

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