Power station smoke alarm system
By combining smoke detection circuit and temperature detection circuit in the smoke alarm system of the power station, the problem of traditional smoke sensor false alarm is solved, and more accurate smoke detection and the effect of reducing false alarms is achieved.
Patent Information
- Application Number
- CN202421575155.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-04
AI Technical Summary
Traditional smoke sensations cannot accurately distinguish between smoke and non-smoke particles, and are prone to false positives, especially when dust or water vapor exists.
A power station smoke alarm system is designed, including smoke detection circuit and temperature detection circuit. Through the control module, the control prompt circuit sends abnormal prompts to avoid false alarms.
It effectively prevents false alarms, ensures the accuracy and reliability of the alarm system, and reduces unnecessary alarms.
Smart Images
Figure CN222838475U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire alarm, in particular to a smoke alarm system for a power station. Background Art
[0002] When traditional smoke sensors are installed for a long time, dust will accumulate inside. When air flows through the smoke sensors, the dust is easily blown up, and the smoke sensors will mistake the dust for smoke. Because of safety considerations, the sensors in the smoke sensors are very sensitive to very small smoke particles, so false alarms often occur; what's more, gases such as water vapor may also cause smoke sensors to alarm. Therefore, traditional smoke sensors cannot accurately distinguish between smoke and non-smoke particles, and are prone to false alarms. Utility Model Content
[0003] The utility model aims to provide a power station smoke alarm system, which is provided with a smoke detection circuit and a temperature detection circuit. When the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module can control the prompt circuit to issue an abnormal prompt to prevent false alarms.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] One aspect of an embodiment of the utility model provides a power station smoke alarm system, the alarm system comprising: a smoke detection circuit, the smoke detection circuit being used to detect smoke concentration data of a target environment; a temperature detection circuit, the temperature detection circuit being used to detect temperature data of a target environment; a control module, the control module being connected to the smoke detection circuit and the temperature detection circuit respectively; a prompt circuit, the prompt circuit being connected to the control module; when the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module controls the prompt circuit to issue an abnormal prompt; when the smoke concentration data of the target environment reaches a second concentration value, the control module controls the prompt circuit to issue an abnormal prompt.
[0006] In some embodiments, the smoke detection circuit includes an optocoupler, a first resistor and a signal amplification circuit, the input end of the light-emitting end of the optocoupler is connected to a power supply, the output end of the light-emitting end of the optocoupler is connected to the control module through the first resistor, the input end of the light-receiving end of the optocoupler is connected to a power supply, the output end of the light-receiving end of the optocoupler is connected to the signal amplification circuit, and the signal output end of the signal amplification circuit is connected to the control module.
[0007] In some embodiments, the signal amplification circuit includes a first NPN transistor, a second NPN transistor, a second resistor, a third resistor and a fourth resistor, the collector of the first NPN transistor and the collector of the second NPN transistor are both connected to a power supply, the base of the first NPN transistor is connected to the output end of the light receiving end of the optocoupler and one end of the second resistor, the emitter of the first NPN transistor is connected to the base of the second NPN transistor and one end of the third resistor, the emitter of the second NPN transistor is connected to one end of the fourth resistor and the control module, and the other end of the second resistor, the other end of the third resistor and the other end of the fourth resistor are all grounded.
[0008] In some embodiments, the signal amplification circuit further includes a first capacitor, and the first capacitor is connected in parallel with the fourth resistor.
[0009] In some embodiments, the temperature detection circuit includes a thermistor and a fifth resistor, one end of the thermistor is connected to a power supply, the other end of the thermistor is connected to one end of the fifth resistor and the control module, and the other end of the fifth resistor is grounded.
[0010] In some embodiments, the temperature detection circuit also includes a third NPN transistor and a sixth resistor, the collector of the third NPN transistor is connected to the power supply, the base of the third NPN transistor is connected to the control module through the sixth resistor, and the emitter of the third NPN transistor is connected to one end of the thermistor.
[0011] In some embodiments, the temperature detection circuit further includes a seventh resistor, one end of the seventh resistor is connected to the base of the third NPN transistor, and the other end of the seventh resistor is grounded.
[0012] In some embodiments, the temperature detection circuit also includes an eighth resistor and a second capacitor, one end of the eighth resistor is connected to one end of the second capacitor, one end of the fifth resistor and the other end of the thermistor, the other end of the eighth resistor is connected to the control module, and the other end of the second capacitor is grounded.
[0013] In some embodiments, the prompt circuit includes a fourth NPN transistor, a speaker and a ninth resistor, the collector of the fourth NPN transistor is connected to the power supply, the base of the fourth NPN transistor is connected to the control module, the emitter of the fourth NPN transistor is connected to the positive pole of the speaker, and the negative pole of the speaker is grounded through the ninth resistor.
[0014] In some embodiments, the warning circuit further includes a warning light and a tenth resistor, the positive electrode of the warning light is connected to the emitter of the fourth NPN transistor, and the negative electrode of the warning light is grounded through the tenth resistor.
[0015] According to a power station smoke alarm system of the embodiment of the utility model, at least the following beneficial effects are achieved: the application is provided with a smoke detection circuit and a temperature detection circuit at the same time, and when the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module can control the prompt circuit to issue an abnormal prompt; or when the smoke concentration data of the target environment reaches a second concentration value, the control module can control the prompt circuit to issue an abnormal prompt. The second concentration value is greater than the first concentration value. To prevent false alarms from occurring.
[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 is a principle block diagram of an alarm system according to an embodiment;
[0019] Figure 2 is a schematic diagram of a smoke detection circuit according to an embodiment;
[0020] Figure 3 is a schematic diagram of a temperature detection circuit according to an embodiment;
[0021] Figure 4 1 is a schematic diagram of a prompt circuit according to an embodiment. DETAILED DESCRIPTION
[0022] 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.
[0023] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.
[0026] The technical solution of the embodiment of the present application is briefly described below:
[0027] According to some embodiments, Figure 1 As shown, the present application provides a power station smoke alarm system, the alarm system comprising:
[0028] Smoke detection circuit, the smoke detection circuit is used to detect the smoke concentration data of the target environment;
[0029] A temperature detection circuit, the temperature detection circuit is used to detect temperature data of a target environment;
[0030] A control module, the control module is respectively connected to a smoke detection circuit and a temperature detection circuit;
[0031] A prompt circuit, wherein the prompt circuit is connected to a control module;
[0032] Based on the working principle of the above embodiment, when the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module controls the prompt circuit to issue an abnormal prompt.
[0033] When the smoke concentration data of the target environment reaches a second concentration value, the control module controls the prompt circuit to issue an abnormal prompt.
[0034] The second concentration value is greater than the first concentration value, and the first concentration value, the second concentration value and the preset temperature value can be set according to actual needs.
[0035] The present application is provided with a smoke detection circuit and a temperature detection circuit at the same time. When the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module can control the prompt circuit to issue an abnormal prompt; or when the smoke concentration data of the target environment reaches a second concentration value, the control module can control the prompt circuit to issue an abnormal prompt. This prevents the occurrence of false alarms.
[0036] In some embodiments, the control module may adopt a single-chip microcomputer chip or other main control chips.
[0037] The following is combined with the appendix of this manual Figures 1 to 4 , the preferred implementation modes of the present disclosure are further elaborated in detail.
[0038] According to some embodiments, Figure 2 As shown, the smoke detection circuit includes an optocoupler U, a first resistor R1 and a signal amplifying circuit, the input end of the light-emitting end of the optocoupler U is connected to a power supply, the output end of the light-emitting end of the optocoupler U is connected to a control module through the first resistor R1, the input end of the light-receiving end of the optocoupler U is connected to a power supply, the output end of the light-receiving end of the optocoupler U is connected to the signal amplifying circuit, and the signal output end of the signal amplifying circuit is connected to the control module.
[0039] Based on the working principle of the above embodiment, the control module outputs a low-level signal 101 to control the conduction of the light-emitting end of the optocoupler U. When there is no smoke in the outside world, the light-receiving end of the optocoupler U does not receive the light signal from the light-emitting end of the optocoupler U, and the light-receiving end of the optocoupler U is cut off. When there is smoke in the outside world, the light signal from the light-emitting end of the optocoupler U is reflected to the light-receiving end of the optocoupler U through the smoke, and the light-receiving end of the optocoupler U is turned on, and the signal amplification circuit receives the electrical signal output by the light-receiving end of the optocoupler U, amplifies it and outputs it to the control module. When the control module detects a high-level signal 102 through the signal amplification circuit, the control module determines that there is smoke in the outside world; when the control module detects a low-level signal 102 through the signal amplification circuit, the control module determines that there is no smoke in the outside world.
[0040] According to some embodiments, Figure 2 As shown, the signal amplification circuit includes a first NPN transistor Q1, a second NPN transistor Q2, a second resistor R2, a third resistor R3 and a fourth resistor R4, the collector of the first NPN transistor Q1 and the collector of the second NPN transistor Q2 are both connected to a power supply, the base of the first NPN transistor Q1 is connected to the output end of the light receiving end of the optocoupler U and one end of the second resistor R2, the emitter of the first NPN transistor Q1 is connected to the base of the second NPN transistor Q2 and one end of the third resistor R3, the emitter of the second NPN transistor Q2 is connected to one end of the fourth resistor R4 and the control module, and the other end of the second resistor R2, the other end of the third resistor R3 and the other end of the fourth resistor R4 are all grounded.
[0041] The first NPN transistor Q1 is used for the first signal amplification, and the second NPN transistor Q2 is used for the second signal amplification.
[0042] According to some embodiments, Figure 2 As shown, the signal amplification circuit further includes a first capacitor C1, which is connected in parallel with the fourth resistor R4. The first capacitor C1 is used for filtering.
[0043] According to some embodiments, Figure 3 As shown, the temperature detection circuit includes a thermistor RR and a fifth resistor R5, one end of the thermistor RR is connected to the power supply, the other end of the thermistor RR is connected to one end of the fifth resistor R5 and the control module, and the other end of the fifth resistor R5 is grounded.
[0044] Based on the working principle of the above embodiment, when the temperature of the target environment is high, the control module receives a high-level signal 202 through the temperature detection circuit; when the temperature of the target environment is low, the control module receives a low-level signal 202 through the temperature detection circuit.
[0045] According to some embodiments, Figure 3 As shown, the temperature detection circuit also includes a third NPN transistor Q3 and a sixth resistor R6, the collector of the third NPN transistor Q3 is connected to the power supply, the base of the third NPN transistor Q3 is connected to the control module through the sixth resistor R6, and the emitter of the third NPN transistor Q3 is connected to one end of the thermistor RR.
[0046] Based on the working principle of the above embodiment, when the temperature of the target environment is normally detected, the signal 201 output by the control module is high level, so that the third NPN transistor Q3 is turned on and is in a saturated state. When the temperature of the target environment is too high, in order to prevent the control module from being broken down by the high voltage of the electrical signal 202 and to facilitate the control module to calculate the temperature value of the target environment, the control module outputs a relatively low level signal 201 to the base of the third NPN transistor Q3, so that the third NPN transistor Q3 reduces the output.
[0047] According to some embodiments, Figure 3 As shown, the temperature detection circuit further includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the base of the third NPN transistor Q3, and the other end of the seventh resistor R7 is grounded.
[0048] When the control module wants to turn off the third NPN transistor Q3, the control module does not output a high level signal, the base of the third NPN transistor Q3 receives a low level signal through the seventh resistor R7, and the third NPN transistor Q3 is turned off.
[0049] According to some embodiments, the temperature detection circuit also includes an eighth resistor R8 and a second capacitor C2, one end of the eighth resistor R8 is connected to one end of the second capacitor C2, one end of the fifth resistor R5 and the other end of the thermistor RR, the other end of the eighth resistor R8 is connected to the control module, and the other end of the second capacitor C2 is grounded.
[0050] The eighth resistor R8 is used for current limiting, and the second capacitor C2 is used for filtering.
[0051] According to some embodiments, Figure 4 As shown, the prompt circuit includes a fourth NPN transistor Q4, a speaker LS and a ninth resistor R9, the collector of the fourth NPN transistor Q4 is connected to the power supply, the base of the fourth NPN transistor Q4 is connected to the control module, the emitter of the fourth NPN transistor Q4 is connected to the positive electrode of the speaker LS, and the negative electrode of the speaker LS is grounded through the ninth resistor R9.
[0052] When the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, or the smoke concentration data of the target environment reaches a second concentration value, the control module outputs a high-level signal 300 to turn on the fourth NPN transistor Q4 to control the speaker LS to issue a sound alarm prompt.
[0053] Further, such as Figure 4 As shown, the warning circuit also includes a warning light D and a tenth resistor R10, the positive electrode of the warning light D is connected to the emitter of the fourth NPN transistor Q4, and the negative electrode of the warning light D is grounded through the tenth resistor R10.
[0054] When the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, or the smoke concentration data of the target environment reaches a second concentration value, the control module outputs a high-level signal 300 to turn on the fourth NPN transistor Q4 to control the speaker LS to emit a sound alarm prompt, and control the indicator light D to emit an alarm flash.
[0055] The working principle of this application is as follows: Figures 2 to 4 As shown, the control module outputs a low-level signal 101 to control the light-emitting end of the optocoupler U to be turned on. When there is no smoke outside, the light-receiving end of the optocoupler U does not receive the light signal from the light-emitting end of the optocoupler U, and the light-receiving end of the optocoupler U is cut off. The control module receives a low-level signal 102 through the smoke detection circuit, and the speaker LS and the warning light D do not work.
[0056] When there is smoke outside, the light signal of the light-emitting end of the optocoupler U is reflected by the smoke to the light-receiving end of the optocoupler U, the light-receiving end of the optocoupler U is turned on, the first NPN transistor Q1 performs the first signal amplification, the second NPN transistor Q2 performs the second signal amplification, the control module receives the high-level signal 102 through the emitter of the second NPN transistor Q2, and then the control module outputs a high-level signal 300 to turn on the fourth NPN transistor Q4 to control the horn LS and the warning light D to work, and the horn LS and the warning light D send out sound and light alarms at the same time.
[0057] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
[0058] Although the present disclosure has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be implemented in a variety of forms without departing from the spirit or essence of the present application, it should be understood that the above-mentioned embodiments are not limited to any of the foregoing details, but should be widely interpreted within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A power station smoke alarm system, characterized in that: The alarm system comprises: A smoke detection circuit, wherein the smoke detection circuit is used to detect smoke concentration data of a target environment; A temperature detection circuit, wherein the temperature detection circuit is used to detect temperature data of a target environment; A control module, wherein the control module is connected to the smoke detection circuit and the temperature detection circuit respectively; a prompt circuit, the prompt circuit being connected to the control module; When the smoke concentration data of the target environment reaches a first concentration value, and the temperature data of the target environment reaches a preset temperature value, the control module controls the prompt circuit to issue an abnormal prompt; When the smoke concentration data of the target environment reaches a second concentration value, the control module controls the prompt circuit to issue an abnormal prompt.
2. The alarm system according to claim 1, characterized in that: The smoke detection circuit includes an optocoupler, a first resistor and a signal amplifying circuit, the input end of the light-emitting end of the optocoupler is connected to a power supply, the output end of the light-emitting end of the optocoupler is connected to the control module through the first resistor, the input end of the light-receiving end of the optocoupler is connected to a power supply, the output end of the light-receiving end of the optocoupler is connected to the signal amplifying circuit, and the signal output end of the signal amplifying circuit is connected to the control module.
3. The alarm system according to claim 2, characterized in that: The signal amplification circuit includes a first NPN transistor, a second NPN transistor, a second resistor, a third resistor and a fourth resistor. The collector of the first NPN transistor and the collector of the second NPN transistor are both connected to a power supply, the base of the first NPN transistor is connected to the output end of the light receiving end of the optocoupler and one end of the second resistor, the emitter of the first NPN transistor is connected to the base of the second NPN transistor and one end of the third resistor, the emitter of the second NPN transistor is connected to one end of the fourth resistor and the control module, and the other end of the second resistor, the other end of the third resistor and the other end of the fourth resistor are all grounded.
4. The alarm system according to claim 3, characterized in that: The signal amplifying circuit further includes a first capacitor, and the first capacitor is connected in parallel with the fourth resistor.
5. The alarm system according to claim 1, characterized in that: The temperature detection circuit includes a thermistor and a fifth resistor, one end of the thermistor is connected to a power supply, the other end of the thermistor is connected to one end of the fifth resistor and the control module, and the other end of the fifth resistor is grounded.
6. The alarm system according to claim 5, characterized in that: The temperature detection circuit also includes a third NPN transistor and a sixth resistor, the collector of the third NPN transistor is connected to the power supply, the base of the third NPN transistor is connected to the control module through the sixth resistor, and the emitter of the third NPN transistor is connected to one end of the thermistor.
7. The alarm system according to claim 6, characterized in that: The temperature detection circuit further includes a seventh resistor, one end of the seventh resistor is connected to the base of the third NPN transistor, and the other end of the seventh resistor is grounded.
8. The alarm system according to claim 5, characterized in that: The temperature detection circuit also includes an eighth resistor and a second capacitor, one end of the eighth resistor is connected to one end of the second capacitor, one end of the fifth resistor and the other end of the thermistor, the other end of the eighth resistor is connected to the control module, and the other end of the second capacitor is grounded.
9. The alarm system according to claim 1, characterized in that: The prompt circuit includes a fourth NPN transistor, a speaker and a ninth resistor, the collector of the fourth NPN transistor is connected to the power supply, the base of the fourth NPN transistor is connected to the control module, the emitter of the fourth NPN transistor is connected to the positive electrode of the speaker, and the negative electrode of the speaker is grounded through the ninth resistor.
10. The alarm system according to claim 9, characterized in that: The warning circuit further includes a warning light and a tenth resistor, wherein the positive electrode of the warning light is connected to the emitter of the fourth NPN transistor, and the negative electrode of the warning light is grounded through the tenth resistor.