Methane temperature alarm

Abstract

The utility model discloses a methane temperature alarm which comprises an upper shell, a lower shell, an induction execution assembly and an alarm device, the upper shell and the lower shell are buckled to form a cavity, and the induction execution assembly and the alarm device are installed in the cavity; the induction execution assembly comprises a starting switch, a detection control circuit and a sensor device, the sensor device comprises a methane sensor and a temperature sensor, the methane sensor is used for detecting environmental methane, and the temperature sensor is used for detecting the temperature of rhizoma polygonati; the detection control circuit is installed on the circuit board and comprises an amplification module, an analog-to-digital conversion chip U3 and a controller U1, and the output end of the methane sensor is connected with the input end of the amplification module. The methane smoke alarm solves the problem that in the prior art, a starting switch needs to be installed on an upper shell or a lower shell, so that an electric wire between the starting switch and a detection control circuit is too long.

Description

Technical Field

[0001] The utility model relates to an alarm, in particular to a methane smoke alarm. Background Art

[0002] A Chinese patent discloses a methane smoke alarm with a self-checking function with an application number of CN202220706386.8. The methane smoke alarm with a self-checking function includes an upper shell, a lower shell and a control component. The lower shell is provided with a magnet, and the magnet is embedded in the lower shell. The control component includes a detection control circuit, a motor, a sensor device and a button battery. The motor and the sensor device are arranged on the detection control circuit. The sensor device includes a methane sensor and a screw. There is a light-emitting tube on the screw. The control component includes a humidity sensor and a buzzer. The humidity sensor and the buzzer are both connected to the detection control circuit.

[0003] Although the above-mentioned methane smoke alarm can realize alarm after detecting smoke, the methane smoke alarm still has the disadvantage that the starting switch needs to be installed on the upper shell or the lower shell, and the detection control circuit is installed in the cavity surrounded by the upper shell and the lower shell, which causes the wires between the starting switch and the detection control circuit to be too long, and also brings inconvenience to the installation process. Summary of the invention

[0004] The utility model provides a methane smoke alarm, which solves the problem in the prior art that a start switch needs to be installed on an upper shell or a lower shell, which causes the wire between the start switch and the detection control circuit to be too long.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a methane temperature alarm, comprising: an upper shell, a lower shell, an inductive actuator component and an alarm device, wherein the upper shell and the lower shell are buckled together to form a chamber, and the inductive actuator component and the alarm device are installed in the chamber;

[0007] The induction execution component includes: a start switch, a detection control circuit and a sensor device, the sensor device includes: a methane sensor and a temperature sensor, the methane sensor is used to detect environmental methane, and the temperature sensor is used to detect the temperature of Polygonatum odoratum;

[0008] The detection control circuit is installed on the circuit board. The detection control circuit includes: an amplification module, an analog-to-digital conversion chip U3 and a controller U1. The output end of the methane sensor is connected to the input end of the amplification module, the output end of the amplification module is connected to the input end of the analog-to-digital conversion chip U3, and the output end of the analog-to-digital conversion chip U3 is connected to the first input end of the controller U1; the output end of the temperature sensing module is connected to the second input end of the controller U1, and the output end of the controller U1 is connected to the control end of the alarm device;

[0009] A circuit board with an induction actuator and an alarm device is installed in the lower shell, and a start switch is installed on the circuit board. One end of the start switch is connected to the DC power supply, and the other end of the start switch is connected to the third input terminal of the controller U1;

[0010] A U-shaped groove is opened in the center of the upper shell, and the U-shaped groove surrounds a pressing block. The pressing block extends toward the lower shell to form a first pressing column. The first pressing column is used to press the middle button of the start switch on the circuit board. The connection between the pressing block and the upper shell is elastic.

[0011] Preferably, the inner wall of the upper shell extends to form a second pressing column, the second pressing column presses the circuit board located on the lower shell, and the second pressing column is located beside the U-shaped groove.

[0012] Preferably, at least two first reinforcing ribs are connected to the edge of the first pressing column, and the first reinforcing ribs are connected to the pressing block.

[0013] Preferably, at least two second reinforcing ribs are connected to the edge of the second pressing column, and the second reinforcing ribs are connected to the inner wall of the upper shell.

[0014] Preferably, the methane sensing module is a methane sensing chip U4, which includes: a direct current input port VCC, a ground port GND and an analog signal output port AOUT, and the analog signal output port AOUT is connected to the amplification module.

[0015] Preferably, the amplifying module includes a first resistor R1, a second resistor R2, a capacitor C4 and an amplifying transistor Q1, the base of the amplifying transistor Q1 is connected to the analog signal output port AOUT, the collector of the amplifying transistor Q1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the direct power supply VCC, the emitter of the amplifying transistor Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, the connection point between the emitter of the amplifying transistor Q1 and the second resistor R2 is connected to the anode of the capacitor C4, the cathode of the capacitor C4 is grounded, and the connection point between the emitter of the amplifying transistor Q1 and the anode of the capacitor C4 is connected to the analog-to-digital conversion chip U3.

[0016] Preferably, the CH1 port of the analog-to-digital conversion chip U3 is connected to the connection point between the emitter of the amplifying transistor Q1 and the anode of the capacitor C4, the GND port of the analog-to-digital conversion chip U3 is grounded, the DI port of the analog-to-digital conversion chip U3 is connected to the DO port, and the connection point between the DI port and the DO port is connected to the controller U1.

[0017] Preferably, the temperature sensing module is a temperature sensor chip U2, the VCC port of the temperature sensor chip U2 is connected to the power supply, and the DQ port of the temperature sensor chip U2 is connected to the P1.0 / T2 port of the controller U1

[0018] Compared with the prior art, the utility model has the following beneficial effects: 1) The methane content in the air is monitored and collected by the methane sensor, and the temperature sensor is used to monitor and collect the temperature in the air. The collected methane content is collected by the methane sensing module, and an analog signal is obtained after the collection. The analog signal is converted into a digital signal by the analog-to-digital conversion chip U3, and then recognized by the controller, so that the detected signal is more accurate and less prone to recognition errors, making methane detection more efficient and avoiding safety accidents; 2) Furthermore, in this application, the start switch is installed on the circuit board, and there is no need to install the start switch on the circuit board. The movable switch is installed on the lower shell or the upper shell, which increases the length of the connecting wire and reduces the use of wires. At the same time, the start switch only needs to be welded on the circuit board. At the same time, a U-shaped groove is opened on the upper shell so that the U-shaped groove can surround a pressing block. The pressing block protrudes to form a first pressing column. The first pressing column is relatively long, so that the start switch can be activated when the pressing block is pressed down. The first pressing column and the pressing block are integrally formed when the upper shell is formed, thereby reducing the steps of welding the start switch to the upper shell. It is only necessary to solder the start switch to the circuit board by soldering, which simplifies the production steps.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a methane smoke alarm.

[0021] Figure 2 This is a schematic diagram of the structure of the upper shell of a methane smoke alarm.

[0022] Figure 3 This is the circuit diagram of the inductive actuator.

[0023] Reference numerals: upper shell 1 , lower shell 2 , pressing block 21 , first pressing column 22 , first reinforcing rib 23 , second pressing column 24 , second reinforcing rib 25 . DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] As shown in Figure 1 to Figure 2, the utility model provides a methane temperature alarm, including: an upper shell, a lower shell, an inductive actuator and an alarm device. The upper shell and the lower shell are buckled together to form a chamber, and the inductive actuator and the alarm device are installed in the chamber; the inductive actuator includes: a start switch, a detection control circuit and a sensor device, the sensor device includes: a methane sensor and a temperature sensor, the methane sensor is used to detect environmental methane, and the temperature sensor is used to detect the temperature of Polygonatum odoratum; the detection control circuit is installed on a circuit board, and the detection control circuit includes: an amplification module, an analog-to-digital conversion chip U3 and a controller U1, the output end of the methane sensor is connected to the input end of the amplification module, and the output end of the amplification module is connected to the analog-to-digital conversion chip U3 and the ... The input end of the conversion chip U3 and the output end of the analog-to-digital conversion chip U3 are connected to the first input end of the controller U1; the output end of the temperature sensing module is connected to the second input end of the controller U1, and the output end of the controller U1 is connected to the control end of the alarm device; a circuit board with a sensing actuator and an alarm device is installed in the lower shell, and a start switch is installed on the circuit board, one end of the start switch is connected to a DC power supply, and the other end of the start switch is connected to the third input end of the controller U1; a U-shaped groove is opened in the center of the upper shell, and the U-shaped groove surrounds a pressing block, and the pressing block extends to the lower shell to form a first pressing column, and the first pressing column is used to press the middle and eastern part of the start switch located on the circuit board, and the connection between the pressing block and the upper shell is elastic.

[0026] The inner wall of the upper shell extends to form a second pressing column, which presses the circuit board on the lower shell tightly. The second pressing column is located next to the U-shaped groove. When the first pressing column and the pressing block are pressed down, the pressing block needs to be deformed. In order to ensure the strength of the root of the pressing block, a second pressing column is provided. The second pressing column can support the root of the pressing block, thereby reducing the probability of deformation of the upper shell.

[0027] At least two first reinforcing ribs are connected to the edge of the first pressing column, and the first reinforcing ribs are connected to the pressing block, so as to ensure that the root of the first pressing column and the pressing block are firmly connected, and the strength of the connection between the first pressing column and the pressing block is ensured.

[0028] At least two second reinforcing ribs are connected to the edge of the second pressing column, and the second reinforcing ribs are connected to the inner wall of the upper shell, so as to ensure that the second pressing column is firmly connected to the root of the upper shell, and ensure the strength of the connection between the second pressing column and the upper shell.

[0029] The methane sensing module is a methane sensing chip U4, and the methane sensing chip model chip is U4MQ-2. The methane sensing chip U4 includes: a DC input port VCC, a ground port GND and an analog signal output port AOUT. The analog signal output port AOUT is connected to the input end of the amplifier module.

[0030] The amplification module includes a first resistor R1, a second resistor R2, a capacitor C4 and an amplifying transistor Q1. The base of the amplifying transistor Q1 is connected to the analog signal output port AOUT, the collector of the amplifying transistor Q1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the direct power supply VCC, the emitter of the amplifying transistor Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, the connection point between the emitter of the amplifying transistor Q1 and the second resistor R2 is connected to the anode of the capacitor C4, the cathode of the capacitor C4 is grounded, and the connection point between the emitter of the amplifying transistor Q1 and the anode of the capacitor C4 is connected to the analog-to-digital conversion chip U3. The amplification module amplifies the analog signal output by the methane sensing chip U4 to facilitate signal recognition.

[0031] The CH1 port of the analog-to-digital conversion chip U3 is connected to the connection point of the emitter of the amplifier transistor Q1 and the anode of the capacitor C4, the GND port of the analog-to-digital conversion chip U3 is grounded, the DI port of the analog-to-digital conversion chip U3 is connected to the DO port, and the connection point between the DI port and the DO port is connected to the controller U1. The analog-to-digital conversion chip receives the amplified analog signal output by the methane sensing chip U4, and converts the analog signal into a digital signal and transmits it to the controller U1 for identification.

[0032] The temperature sensing module is the temperature sensor chip U2. The VCC port of the temperature sensor chip U2 is connected to the power supply, and the DQ port of the temperature sensor chip U2 is connected to the P1.0 / T2 port of the controller U1. The temperature sensing module converts the temperature value collected by the temperature sensor into a digital signal and transmits the digital signal to the controller U1 for identification.

[0033] The temperature sensor chip U2 uses the DS18B20 model chip.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Methane temperature alarm, characterized in that: include: An upper shell, a lower shell, an inductive actuator component and an alarm device, wherein the upper shell and the lower shell are buckled together to form a chamber, and the inductive actuator component and the alarm device are installed in the chamber; The induction execution component includes: a start switch, a detection control circuit and a sensor device, the sensor device includes: a methane sensor and a temperature sensor, the methane sensor is used to detect environmental methane, and the temperature sensor is used to detect the temperature of Polygonatum odoratum; The detection control circuit is installed on the circuit board. The detection control circuit includes: an amplification module, an analog-to-digital conversion chip U3 and a controller U1. The output end of the methane sensor is connected to the input end of the amplification module, the output end of the amplification module is connected to the input end of the analog-to-digital conversion chip U3, and the output end of the analog-to-digital conversion chip U3 is connected to the first input end of the controller U1; the output end of the temperature sensing module is connected to the second input end of the controller U1, and the output end of the controller U1 is connected to the control end of the alarm device; A circuit board with an induction actuator and an alarm device is installed in the lower shell, and a start switch is installed on the circuit board. One end of the start switch is connected to the DC power supply, and the other end of the start switch is connected to the third input terminal of the controller U1; A U-shaped groove is opened in the center of the upper shell, and the U-shaped groove surrounds a pressing block. The pressing block extends toward the lower shell to form a first pressing column. The first pressing column is used to press the middle button of the start switch on the circuit board. The connection between the pressing block and the upper shell is elastic.

2. A methane temperature alarm according to claim 1, characterized in that: The inner wall of the upper shell extends to form a second pressing column, which presses the circuit board on the lower shell tightly. The second pressing column is located beside the U-shaped groove.

3. A methane temperature alarm according to claim 2, characterized in that: At least two first reinforcing ribs are connected to the edge of the first pressing column, and the first reinforcing ribs are connected to the pressing block.

4. A methane temperature alarm according to claim 1, characterized in that: At least two second reinforcing ribs are connected to the edge of the second pressing column, and the second reinforcing ribs are connected to the inner wall of the upper shell.

5. A methane temperature alarm according to claim 1, characterized in that: The methane sensing module is a methane sensing chip U4, which includes: a direct current input port VCC, a ground port GND and an analog signal output port AOUT, and the analog signal output port AOUT is connected to the amplification module.

6. A methane temperature alarm according to claim 5, characterized in that: The amplification module includes a first resistor R1, a second resistor R2, a capacitor C4 and an amplifying transistor Q1. The base of the amplifying transistor Q1 is connected to the analog signal output port AOUT, the collector of the amplifying transistor Q1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the direct power supply VCC, the emitter of the amplifying transistor Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, the connection point between the emitter of the amplifying transistor Q1 and the second resistor R2 is connected to the anode of the capacitor C4, the cathode of the capacitor C4 is grounded, and the connection point between the emitter of the amplifying transistor Q1 and the anode of the capacitor C4 is connected to the analog-to-digital conversion chip U3.

7. A methane temperature alarm according to claim 6, characterized in that: The CH1 port of the analog-to-digital conversion chip U3 is connected to the connection point between the emitter of the amplifier transistor Q1 and the anode of the capacitor C4, the GND port of the analog-to-digital conversion chip U3 is grounded, the DI port of the analog-to-digital conversion chip U3 is connected to the DO port, and the connection point between the DI port and the DO port is connected to the controller U1.

8. A methane temperature alarm according to claim 1, characterized in that: The temperature sensing module is a temperature sensor chip U2. The VCC port of the temperature sensor chip U2 is connected to the power supply, and the DQ port of the temperature sensor chip U2 is connected to the P1.0 / T2 port of the controller U1.

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