Smoke sensor

Abstract

The utility model relates to a smoke sensor. The smoke sensor comprises a main control circuit, and a smoke detection circuit, a preprocessing circuit and a voltage stabilizing circuit which are electrically connected with the main control circuit, the smoke detection circuit is used for collecting smoke signals; the pre-processing circuit is used for pre-processing the smoke signal; the main control circuit controls external alarm equipment according to the preprocessed smoke signal; and the voltage stabilizing circuit is used for supplying power. According to the utility model, the main control circuit outputs a control signal to a controlled object according to a processed smoke signal, that is, when the smoke detection circuit detects smoke and a fire hazard, the alarm lamp of the controlled object is controlled to give an alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors; specifically, the utility model relates to a smoke sensor. Background Art

[0002] Fire safety is the focus of modern building safety protection. If such unexpected fires cannot be detected and warned in time, and the fires cannot be nipped in the bud, the consequences will be disastrous. A smoke sensor is needed as an important tool to help people monitor fires and give early warnings. Utility Model Content

[0003] The purpose of the utility model is to provide a smoke sensor, which can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0004] In order to achieve the above-mentioned object, the utility model provides a smoke sensor, wherein the smoke sensor comprises:

[0005] A main control circuit, and a smoke detection circuit, a preprocessing circuit and a voltage stabilizing circuit electrically connected to the main control circuit;

[0006] The smoke detection circuit is used to collect smoke signals; the preprocessing circuit preprocesses the smoke signals; the main control circuit controls external alarm equipment according to the preprocessed smoke signals; and the voltage stabilizing circuit is used to supply power.

[0007] In the smoke sensor as described above, optionally, the smoke detection circuit includes a chip U3, the model of the chip U3 is LM393, the pin 1 of the chip U3 is connected to one end of the light-emitting diode LED2, one end of the resistor R2, and one end of the capacitor C2, the other end of the light-emitting diode LED2 is connected to a 3.3V voltage, the other end of the capacitor C2 is grounded, and the other end of the resistor R2 is connected to a 3.3V voltage; the pin 2 of the chip U3 is connected to one end of the capacitor C3, one end of the resistor R4, and the pins 1 and 3 of the bistable trigger, and the other end of the capacitor C3 is connected to ground, the other end of the resistor R4 is grounded, the pin 2 of the bistable trigger is connected to one end of the resistor R3, the other end of the resistor R3 is grounded, the pin 4, pin 5 and pin 6 of the bistable trigger are connected to a 3.3V voltage; the pin 3 of the chip U3 is connected to the sliding end of the sliding rheostat R1, one end of the sliding rheostat R1 is grounded, and the other end of the sliding rheostat R1 is connected to a 3.3V voltage; the pin 4 of the chip U3 is grounded; the pin 8 of the chip U3 is connected to one end of the capacitor C1 and a 3.3V voltage, and the other end of the capacitor C1 is grounded.

[0008] In the smoke sensor as described above, optionally, the preprocessing circuit includes a chip U5, the chip U5 model is SP485, the pin 1 of the chip U5 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to one end of the resistor R8 and a 3.3V voltage; the pin 2 of the chip U5 is connected to the other end of the resistor R8 and to the collector of the transistor Q1; the pin 3 of the chip U5 is connected to the pin 2 of the chip U5; the pin 4 of the chip U5 is connected to the emitter of the transistor Q1 and is grounded, and the The base is connected to one end of the resistor R10; the pin 5 of the chip U5 is connected to one end of the resistor R12 and is grounded; the pin 6 of the chip U5 is connected to one end of the resistor R9, one end of the resistor R11, and the first end of the diode D1; the pin 7 of the chip U5 is connected to the other end of the resistor R12, the other end of the resistor R11, and the second end of the diode D1, and the third end of the diode D1 is grounded; the pin 8 of the chip U5 is connected to the other end of the resistor R9, one end of the capacitor C11 and a 3.3V voltage, and the other end of the capacitor C11 is grounded.

[0009] In the smoke sensor as described above, optionally, the main control circuit includes a chip U1, the model of the chip U1 is CS32L010, the pin 3 of the chip U1 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to one end of the light-emitting diode LED1, and the other end of the light-emitting diode LED1 is grounded; the pin 7 of the chip U1 is grounded; the pin 8 of the chip U1 is connected to one end of the capacitor C5, and the other end of the capacitor C5 is grounded; the pin 9 of the chip U1 is connected to one end of the capacitor C6, one end of the capacitor C4 and a 3.3V voltage; the other end of the capacitor C6 and the other end of the capacitor C4 are grounded.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the smoke detection circuit collects the smoke signal and transmits it to the main control circuit; the main control circuit transmits the smoke signal to the preprocessing circuit, the preprocessing circuit processes the smoke signal, filters out the error signal, and transmits the processed smoke signal back to the main control circuit; the main control circuit outputs a control signal to the controlled object according to the processed smoke signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a circuit diagram of the smoke sensor of the utility model;

[0012] Figure 2 This is a circuit diagram of the main control circuit in the smoke sensor of the utility model;

[0013] Figure 3 A circuit diagram of a smoke detection circuit in a smoke sensor of the utility model;

[0014] Figure 4It is a circuit diagram of a pre-processing circuit in a smoke sensor of the utility model;

[0015] Figure 5 The utility model is a circuit diagram of a voltage stabilizing circuit in a smoke sensor.

[0016] In the figure: 1. Main control circuit; 2. Smoke detection circuit; 3. Preprocessing circuit; 4. Voltage stabilizing circuit. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. The terms "first", "second" and similar words used in the description of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components, and therefore cannot be understood as limitations on the present invention.

[0019] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0020] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0021] Figure 1 The circuit diagram of the smoke sensor of the utility model shows a main control circuit 1, a smoke detection circuit 2, a preprocessing circuit 3 and a voltage stabilizing circuit 4 of the smoke sensor.

[0022] like Figure 1-5 As shown, the smoke detection circuit 2 , the preprocessing circuit 3 and the voltage stabilizing circuit 4 are all electrically connected to the main control circuit 1 .

[0023] Specifically, the smoke detection circuit 2 is used to collect smoke signals; the preprocessing circuit 3 preprocesses the smoke signals; the main control circuit 1 controls the external alarm device according to the preprocessed smoke signals; and the voltage stabilizing circuit 4 is used to convert the external 5V power supply into 3.3V for power supply.

[0024] Among them, P1 is the burning port, P2 is the signal port, and P3 is the power port.

[0025] Furthermore, the smoke detection circuit 2 includes a chip U3, the model of the chip U3 is LM393, the pin 1 of the chip U3 is connected to one end of the light-emitting diode LED2, one end of the resistor R2, and one end of the capacitor C2, the other end of the light-emitting diode LED2 is connected to a 3.3V voltage, the other end of the capacitor C2 is grounded, and the other end of the resistor R2 is connected to a 3.3V voltage; the pin 2 of the chip U3 is connected to one end of the capacitor C3, one end of the resistor R4, and the pins 1 and 3 of the bistable trigger, and the other end of the capacitor C3 is grounded. The other end of resistor R4 is grounded, pin 2 of the bistable trigger is connected to one end of resistor R3, the other end of resistor R3 is grounded, pin 4, pin 5 and pin 6 of the bistable trigger are connected to 3.3V voltage; pin 3 of chip U3 is connected to the sliding end of sliding rheostat R1, one end of sliding rheostat R1 is grounded, and the other end of sliding rheostat R1 is connected to 3.3V voltage; pin 4 of chip U3 is grounded; pin 8 of chip U3 is connected to one end of capacitor C1 and 3.3V voltage, and the other end of capacitor C1 is grounded.

[0026] Furthermore, the preprocessing circuit 3 includes a chip U5, the model of the chip U5 is SP485, the pin 1 of the chip U5 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to one end of the resistor R8 and the 3.3V voltage; the pin 2 of the chip U5 is connected to the other end of the resistor R8 and the collector of the transistor Q1; the pin 3 of the chip U5 is connected to the pin 2 of the chip U5; the pin 4 of the chip U5 is connected to the emitter of the transistor Q1 and is grounded, and the base of the transistor Q1 is connected to the resistor R1 0; Pin 5 of chip U5 is connected to one end of resistor R12 and grounded; Pin 6 of chip U5 is connected to one end of resistor R9, one end of resistor R11, and a first end of diode D1; Pin 7 of chip U5 is connected to the other end of resistor R12, the other end of resistor R11, and the second end of diode D1, and the third end of diode D1 is grounded; Pin 8 of chip U5 is connected to the other end of resistor R9, one end of capacitor C11 and 3.3V voltage, and the other end of capacitor C11 is grounded.

[0027] Furthermore, the main control circuit 1 includes a chip U1, the model of chip U1 is CS32L010, pin 3 of chip U1 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of light-emitting diode LED1, and the other end of light-emitting diode LED1 is grounded; pin 7 of chip U1 is grounded; pin 8 of chip U1 is connected to one end of capacitor C5, and the other end of capacitor C5 is grounded; pin 9 of chip U1 is connected to one end of capacitor C6, one end of capacitor C4 and 3.3V voltage; the other end of capacitor C6 and the other end of capacitor C4 are grounded.

[0028] Specifically, the pin 1 of the chip U1 detects the high and low levels of the chip U3 (LM393). When there is no smoke, the chip U3 (LM393) outputs a high level, and when there is smoke, the chip U3 (LM393) outputs a low level.

[0029] When in use, the smoke detection circuit 2 collects smoke signals and transmits them to the main control circuit 1; the main control circuit 1 transmits the smoke signals to the preprocessing circuit 3, which processes the smoke signals, filters out the error signals, and transmits the processed smoke signals back to the main control circuit 1; the main control circuit 1 outputs a control signal to the controlled object according to the processed smoke signals. That is, when the smoke detection circuit 2 detects smoke and there is a possibility of fire, the alarm light of the controlled object is controlled to sound an alarm.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoke sensor, characterized in that: The smoke sensor comprises: a main control circuit (1), and a smoke detection circuit (2), a preprocessing circuit (3) and a voltage stabilizing circuit (4) electrically connected to the main control circuit (1); The smoke detection circuit (2) is used to collect smoke signals; the preprocessing circuit (3) preprocesses the smoke signals; the main control circuit (1) controls external alarm equipment according to the preprocessed smoke signals; the voltage stabilizing circuit (4) is used to supply power; The preprocessing circuit (3) comprises a chip U5, the model of the chip U5 is SP485, the pin 1 of the chip U5 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to one end of a resistor R8 and a 3.3V voltage; the pin 2 of the chip U5 is connected to the other end of the resistor R8 and to the collector of a transistor Q1; the pin 3 of the chip U5 is connected to the pin 2 of the chip U5; the pin 4 of the chip U5 is connected to the emitter of the transistor Q1 and to ground, and the base of the transistor Q1 is connected to the resistor R1 0; Pin 5 of the chip U5 is connected to one end of the resistor R12 and is grounded; Pin 6 of the chip U5 is connected to one end of the resistor R9, one end of the resistor R11, and the first end of the diode D1; Pin 7 of the chip U5 is connected to the other end of the resistor R12, the other end of the resistor R11, and the second end of the diode D1, and the third end of the diode D1 is grounded; Pin 8 of the chip U5 is connected to the other end of the resistor R9, one end of the capacitor C11 and a 3.3V voltage, and the other end of the capacitor C11 is grounded.

2. The smoke sensor according to claim 1, characterized in that: The smoke detection circuit (2) comprises a chip U3, the model of the chip U3 is LM393, the pin 1 of the chip U3 is connected to one end of a light emitting diode LED2, one end of a resistor R2, and one end of a capacitor C2, the other end of the light emitting diode LED2 is connected to a 3.3V voltage, the other end of the capacitor C2 is grounded, and the other end of the resistor R2 is connected to a 3.3V voltage; the pin 2 of the chip U3 is connected to one end of a capacitor C3, one end of a resistor R4, and pins 1 and 3 of a bistable trigger, the other end of the capacitor C3 is grounded, and the resistor R 4 is grounded, the pin 2 of the bistable trigger is connected to one end of the resistor R3, the other end of the resistor R3 is grounded, and the pins 4, 5 and 6 of the bistable trigger are connected to a 3.3V voltage; the pin 3 of the chip U3 is connected to the sliding end of the sliding rheostat R1, one end of the sliding rheostat R1 is grounded, and the other end of the sliding rheostat R1 is connected to a 3.3V voltage; the pin 4 of the chip U3 is grounded; the pin 8 of the chip U3 is connected to one end of the capacitor C1 and a 3.3V voltage, and the other end of the capacitor C1 is grounded.

3. The smoke sensor according to claim 1, characterized in that: The main control circuit (1) comprises a chip U1, the model of the chip U1 is CS32L010, the pin 3 of the chip U1 is connected to one end of a resistor R5, the other end of the resistor R5 is connected to one end of a light-emitting diode LED1, and the other end of the light-emitting diode LED1 is grounded; the pin 7 of the chip U1 is grounded; the pin 8 of the chip U1 is connected to one end of a capacitor C5, and the other end of the capacitor C5 is grounded; the pin 9 of the chip U1 is connected to one end of a capacitor C6, one end of a capacitor C4 and a 3.3V voltage; the other end of the capacitor C6 and the other end of the capacitor C4 are grounded.

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