Automatic fire alarm device for parking lot

Abstract

The utility model discloses a parking area is with automatic fire alarm device, it includes smoke response module, temperature response module, humidity correction module, signal processing module, data storage module, alarm trigger module and reset control module. Through multilayer filter screen unit filters dust, temperature compensation circuit improves temperature measurement accuracy, humidity correction reduces environmental interference, and combines environmental adaptive module dynamic adjustment sensitivity, has promoted detection precision and adaptability, acousto -optic alarm and remote communication realize local and remote alarm, manual and automatic reset ensure safety. The present application can effectively solve the problem of insufficient detection sensitivity, easy to be interfered with and low function integration in parking lot environment, satisfy real -time monitoring and quick response demand.

Description

Technical Field

[0001] This utility model relates to the field of fire safety technology, and in particular to an automatic fire alarm device for parking lots. Background Technology

[0002] To improve parking lot safety and reduce fire hazards, fire alarm devices are typically installed in parking lots. However, existing fire alarm devices have certain limitations in the parking lot environment. For example, their sensitivity to smoke or temperature changes is insufficient, which may lead to alarm delays. Furthermore, some devices are susceptible to interference from dust, humidity, and other factors in complex environments, affecting their normal operation. At the same time, the functional integration of existing devices is low, making it difficult to meet the parking lot's needs for real-time monitoring and rapid response. To address these issues, we propose an automatic fire alarm device for parking lots. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic fire alarm device for parking lots, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: an automatic fire alarm device for parking lots includes a smoke sensing module, a temperature sensing module, a humidity correction module, a signal processing module, a data storage module, an alarm triggering module, and a reset control module. The smoke sensing module and temperature sensing module respectively collect smoke concentration signals and temperature change signals within the parking lot and transmit the collected signals to the signal processing module for processing. The humidity correction module collects the ambient humidity signal and sends it to the signal processing module for correction. The signal processing module compares the corrected signal with a preset threshold and transmits it to the data storage module for recording. The data storage module transmits the recorded data to the alarm triggering module. The signal processing module is also connected to the reset control module via its output terminal to cut off the start-up circuit of the alarm triggering module in abnormal situations.

[0005] Furthermore, an automatic fire alarm device for parking lots also includes an environmental adaptive module. This module dynamically adjusts the sensitivity parameters of the smoke and temperature sensing modules by receiving feedback signals from the signal processing module, thereby reducing the interference of environmental factors on the detection results. The environmental adaptive module is connected to the signal processing module via a wired connection and contains an adjustable resistor circuit to adjust the gain value of the input signal.

[0006] Furthermore, the smoke sensing module includes a multi-layer filter unit and a photoelectric sensor unit. The multi-layer filter unit is located at the front end of the photoelectric sensor unit to filter dust particles in the air and reduce the impact of dust on the photoelectric sensor unit. The photoelectric sensor unit consists of an infrared light source emitter and a photosensitive receiver, forming a fixed-angle optical path channel between them. When smoke particles enter the optical path channel, the light intensity received by the photosensitive receiver changes, thereby generating a smoke concentration signal. The temperature sensing module includes a thermocouple probe and a temperature compensation circuit. The thermocouple probe is installed on the top of the parking lot near the ventilation opening for real-time monitoring of the ambient temperature. The temperature compensation circuit linearizes the output signal of the thermocouple probe using an operational amplifier to improve the accuracy of temperature measurement.

[0007] Furthermore, the humidity correction module includes a humidity-sensitive resistor element and a signal amplification circuit. The humidity-sensitive resistor element is installed at the side opening of the alarm device housing to sense the ambient humidity. The signal amplification circuit amplifies the output signal of the humidity-sensitive resistor element through a differential amplifier and transmits the amplified signal to the signal processing module. The signal processing module corrects the smoke concentration signal and temperature signal according to the humidity signal, thereby reducing the influence of humidity on the detection results.

[0008] Furthermore, the signal processing module includes an analog-to-digital conversion unit, a logic judgment unit, and a signal output unit. The analog-to-digital conversion unit converts the analog signal into a digital signal and transmits it to the logic judgment unit. The logic judgment unit has preset smoke concentration threshold, temperature change rate threshold, and humidity correction coefficient. It generates a trigger signal or a normal signal by performing logical operations on the input signal. The signal output unit transmits the output signal of the logic judgment unit to the data storage module and the alarm triggering module, respectively.

[0009] Furthermore, the alarm triggering module includes an audible and visual alarm unit and a remote communication unit. The audible and visual alarm unit consists of a buzzer and an LED light. The buzzer and the LED light are respectively connected to the output terminal of the signal processing module through a relay. When a trigger signal is received, the buzzer emits a high-frequency alarm sound, and the LED light flashes red light. The remote communication unit is connected to the monitoring system of the parking lot management center through a wireless communication module to upload alarm information to the monitoring system in real time.

[0010] Furthermore, the reset control module includes a manual reset switch and an automatic reset circuit. The manual reset switch is installed on the front of the alarm device's housing, and the user can turn off the alarm trigger module by pressing the manual reset switch. The automatic reset circuit is connected to the signal processing module through a timer chip. When the environment is detected to return to normal, the timer chip automatically cuts off the start-up circuit of the alarm trigger module after a set time delay.

[0011] Furthermore, the data storage module employs a non-volatile memory chip to record the time, location, smoke concentration, temperature changes, and humidity data for each alarm event. The non-volatile memory chip is connected to the signal processing module via a serial interface, supporting data reading and export operations, which facilitates subsequent analysis and maintenance.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model provides an automatic fire alarm device for parking lots. The multi-layer filter unit in the smoke sensing module effectively filters dust particles, improving the accuracy of smoke detection. The temperature compensation circuit in the temperature sensing module linearizes the output signal of the thermocouple probe, enhancing the reliability of temperature measurement. The humidity correction module corrects the smoke concentration and temperature signals, reducing the interference of humidity on the detection results. The environmental adaptive module dynamically adjusts the detection sensitivity parameters, further improving the device's adaptability in complex environments. The alarm triggering module combines local alarm and remote monitoring through an audible and visual alarm unit and a remote communication unit, meeting the parking lot's needs for real-time monitoring and rapid response. The manual reset switch and automatic reset circuit in the reset control module ensure the safety and stability of the device under abnormal conditions. Attached Figure Description

[0013] Figure 1 A block diagram of the overall structure of an automatic fire alarm device for parking lots;

[0014] Figure 2 This diagram illustrates the relationship between the environmental adaptive module and the signal processing module of an automatic fire alarm device for parking lots.

[0015] Figure 3 This is a diagram showing the internal structure of a smoke detection module in an automatic fire alarm device for parking lots.

[0016] Figure 4 The internal structure of a temperature correction module for an automatic fire alarm device used in parking lots;

[0017] Figure 5 This is a block diagram of the internal structure of the signal processing module of an automatic fire alarm device for parking lots.

[0018] Figure 6 This is a block diagram of the internal structure of the alarm trigger module of an automatic fire alarm device for parking lots.

[0019] Figure 7 This is a block diagram of the internal structure of the reset control module of an automatic fire alarm device for parking lots.

[0020] The attached diagram is labeled as follows: 1. Smoke sensor module; 2. Temperature sensor module; 3. Humidity correction module; 4. Signal processing module; 5. Data storage module; 6. Alarm triggering module; 7. Reset control module; 8. Multi-layer filter unit; 9. Photoelectric sensor unit; 10. Infrared light source transmitter; 11. Photosensitive receiver. Detailed Implementation

[0021] This utility model provides an automatic fire alarm device for parking lots, the overall structure of which is as follows: Figure 1 As shown, the device includes a smoke detection module 1, a temperature detection module 2, a humidity correction module 3, a signal processing module 4, a data storage module 5, an alarm triggering module 6, and a reset control module 7. These modules are connected by circuitry to form a complete system, and the modules communicate with each other via signal transmission lines. The smoke detection module 1 and temperature detection module 2 respectively collect smoke concentration signals and temperature change signals within the parking lot and transmit these signals to the signal processing module 4. The humidity correction module 3 collects the ambient humidity signal and sends it to the signal processing module 4 for correcting the smoke concentration and temperature signals. After processing the received signals, the signal processing module 4 transmits the data to the data storage module 5 to record and save relevant information. Simultaneously, the signal processing module 4 generates a trigger signal or a normal signal based on the processing results and transmits it to the alarm triggering module 6 to determine whether to activate the alarm. The reset control module 7 is connected to the signal processing module 4 and is used to disconnect the activation circuit of the alarm triggering module 6 in abnormal situations.

[0022] The specific structure of smoke detection module 1 is as follows: Figure 2 As shown, it includes a multi-layer filter unit 8 and a photoelectric sensor unit 9. The multi-layer filter unit 8 is arranged at the front end of the photoelectric sensor unit 9, and the two are installed inside the alarm device housing by mechanical fasteners. The multi-layer filter unit 8 is composed of multiple stacked metal meshes with different pore sizes, and its main function is to filter suspended dust particles in the air, thereby reducing the impact of dust on the photoelectric sensor unit 9. The photoelectric sensor unit 9 includes an infrared light source emitter 10 and a photosensitive receiver 11, which are fixed inside the alarm device by a bracket, and a fixed-angle optical path channel is formed between the infrared light source emitter 10 and the photosensitive receiver 11. The infrared light emitted by the infrared light source emitter 10 is received by the photosensitive receiver 11 through the optical path channel. When smoke particles enter the optical path channel, the light intensity received by the photosensitive receiver 11 changes, thereby generating a smoke concentration signal. The smoke sensing module 1 is connected to the signal processing module 4 through a signal line, and transmits the generated smoke concentration signal to the signal processing module 4 for subsequent processing.

[0023] Temperature sensing module 2 includes a thermocouple probe and a temperature compensation circuit. The thermocouple probe is installed on the roof of the parking lot near the ventilation opening and is connected to the temperature compensation circuit via a wire. The thermocouple probe is responsible for monitoring the ambient temperature in real time and transmitting the temperature signal to the temperature compensation circuit. The temperature compensation circuit contains an operational amplifier, which linearizes the weak signal output by the thermocouple probe to improve the accuracy of temperature measurement. The temperature compensation circuit is connected to signal processing module 4 via a signal transmission line, sending the processed temperature signal to signal processing module 4 for further analysis and comparison.

[0024] The humidity correction module 3 includes a humidity-sensitive resistor element and a signal amplification circuit. The humidity-sensitive resistor element is installed at an opening on the side of the alarm device's housing and can sense the ambient humidity and generate a humidity signal. The humidity-sensitive resistor element is connected to the signal amplification circuit via a wire. The signal amplification circuit contains a differential amplifier to amplify the weak signal output by the humidity-sensitive resistor element. The amplified humidity signal is sent to the signal processing module 4 via a signal transmission line. The signal processing module 4 corrects the smoke concentration signal and temperature signal based on the humidity signal to reduce the influence of humidity on the detection results.

[0025] The signal processing module 4 includes an analog-to-digital conversion unit, a logic judgment unit, and a signal output unit. The analog-to-digital conversion unit receives analog signals from the smoke sensing module 1, temperature sensing module 2, and humidity correction module 3, converts them into digital signals, and transmits them to the logic judgment unit. The logic judgment unit has preset smoke concentration thresholds, temperature change rate thresholds, and humidity correction coefficients. It generates trigger signals or normal signals by performing logical operations on the input digital signals. The signal output unit transmits the output signals from the logic judgment unit to the data storage module 5 and the alarm triggering module 6, respectively. The signal processing module 4 is also connected to the reset control module 7 via a signal transmission line, and is used to send commands to the reset control module 7 in abnormal situations to cut off the start-up circuit of the alarm triggering module 6.

[0026] The alarm triggering module 6 includes an audible and visual alarm unit and a remote communication unit. The audible and visual alarm unit consists of a buzzer and an LED light, both connected to the output of the signal processing module 4 via relays. When the signal processing module 4 sends a trigger signal, the relays activate, the buzzer emits a high-frequency alarm sound, and the LED light flashes red, thus achieving the local alarm function. The remote communication unit connects to the parking lot management center's monitoring system via a wireless communication module to upload alarm information to the monitoring system in real time. The wireless communication module uses existing communication protocols to ensure that alarm information can be transmitted to the monitoring center quickly and accurately.

[0027] The reset control module 7 includes a manual reset switch and an automatic reset circuit. The manual reset switch is installed on the front of the alarm device's housing, allowing the user to turn off the alarm trigger module 6 by pressing the switch. The automatic reset circuit contains a timer chip, which is connected to the signal processing module 4 via a signal transmission line. When the signal processing module 4 detects that the environment has returned to normal, the timer chip automatically cuts off the start-up circuit of the alarm trigger module 6 after a set time delay, thus achieving the automatic reset function.

[0028] The data storage module 5 uses a non-volatile memory chip, which is connected to the signal processing module 4 via a serial interface. The non-volatile memory chip records the time, location, smoke concentration, temperature changes, and humidity data for each alarm event. The data storage module 5 supports data reading and export operations, facilitating subsequent analysis and maintenance. In practical applications, managers can connect to the data storage module 5 using a dedicated data reading device to retrieve and analyze the stored data.

[0029] The working process of this utility model is as follows: When a fire occurs in the parking lot, the multi-layer filter unit 8 in the smoke sensing module 1 filters out dust particles in the air, and the infrared light emitted by the infrared light source emitter 10 of the photoelectric sensor unit 9 is received by the photosensitive receiver 11 through the optical path channel. Once smoke particles enter the optical path channel, the light intensity received by the photosensitive receiver 11 changes, thereby generating a smoke concentration signal. The smoke concentration signal is transmitted to the signal processing module 4 through the signal line. At the same time, the thermocouple probe in the temperature sensing module 2 monitors the ambient temperature in real time and transmits the temperature signal to the temperature compensation circuit. The temperature compensation circuit linearizes the temperature signal and sends it to the signal processing module 4. The humidity-sensitive resistor element in the humidity correction module 3 senses the ambient humidity and generates a humidity signal. The humidity signal is amplified by the signal amplification circuit and transmitted to the signal processing module 4. The analog-to-digital conversion unit in the signal processing module 4 converts the analog signal into a digital signal. The logic judgment unit performs logical operations on the signal according to the preset smoke concentration threshold, temperature change rate threshold, and humidity correction coefficient to generate a trigger signal or a normal signal. If a trigger signal is generated, the signal output unit transmits the trigger signal to the alarm trigger module 6. The audible and visual alarm unit in alarm trigger module 6 is activated, emitting a high-frequency alarm sound and flashing a red LED. Simultaneously, the remote communication unit uploads the alarm information to the parking management center's monitoring system in real time via the wireless communication module. The manual reset switch in reset control module 7 allows users to manually disable alarm trigger module 6, while the automatic reset circuit automatically disconnects the alarm trigger module 6's activation circuit after a set time delay once the environment returns to normal. Data storage module 5 records relevant data for each alarm event, facilitating subsequent analysis and maintenance.

[0030] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the operating principle and specific implementation steps of this utility model is provided in conjunction with the specific application scenario of parking lot fire alarm.

[0031] When a fire occurs in an area of ​​the parking lot, the multi-layer filter unit 8 in the smoke detection module 1 takes effect first. The multi-layer filter unit 8 is composed of multiple stacked metal meshes with different pore sizes, arranged in front of the photoelectric sensor unit 9. It effectively filters airborne dust particles, preventing them from entering the optical path and interfering with the detection results. Infrared light emitted by the infrared light source emitter 10 is received by the photosensitive receiver 11 through a fixed-angle optical path. Once smoke particles enter the optical path, the propagation path of the infrared light is interfered with, and the light intensity received by the photosensitive receiver 11 changes. This change is converted into a smoke concentration signal through photoelectric conversion, and then transmitted to the signal processing module 4 via a signal line.

[0032] Meanwhile, the thermocouple probe in temperature sensing module 2 monitors changes in ambient temperature in real time. Installed on the roof of the parking lot near the ventilation openings, the thermocouple probe can quickly detect temperature anomalies. The weak temperature signal collected by the thermocouple probe is transmitted to a temperature compensation circuit, where an operational amplifier linearizes the signal, improving the accuracy of the temperature measurement. The processed temperature signal is then sent to signal processing module 4 via a signal transmission line for further analysis and comparison.

[0033] The humidity-sensitive resistor element in humidity correction module 3 is installed at the side opening of the alarm device housing and can sense changes in ambient humidity. The humidity-sensitive resistor element transmits the humidity signal through a wire to the signal amplification circuit. The differential amplifier in the signal amplification circuit amplifies the weak signal and then transmits the amplified humidity signal to signal processing module 4. Signal processing module 4 corrects the smoke concentration and temperature signals based on the humidity signal to reduce the impact of humidity on the detection results.

[0034] The analog-to-digital conversion unit within the signal processing module 4 converts the analog signals from the smoke sensing module 1, temperature sensing module 2, and humidity correction module 3 into digital signals, which are then transmitted to the logic judgment unit. The logic judgment unit has preset smoke concentration thresholds, temperature change rate thresholds, and humidity correction coefficients. It performs logical operations on the input digital signals to determine if a fire hazard exists in the current environment. If the smoke concentration exceeds the preset thresholds and the temperature change rate is higher than a set value, the logic judgment unit generates a trigger signal, which is transmitted to the alarm trigger module 6 via the signal output unit.

[0035] Upon receiving a trigger signal, the audible and visual alarm unit in alarm trigger module 6 activates a relay, ignites a high-frequency alarm sound, and flashes a red LED, thus achieving the local alarm function. Simultaneously, the remote communication unit uploads the alarm information in real-time to the parking management center's monitoring system via a wireless communication module, ensuring that management personnel can take timely action. The wireless communication module uses existing communication protocols to guarantee that alarm information can be transmitted to the monitoring center quickly and accurately.

[0036] The manual reset switch of the reset control module 7 is installed on the front of the alarm device's housing. Users can turn off the alarm trigger module 6 by pressing the manual reset switch. Furthermore, the timer chip in the automatic reset circuit is connected to the signal processing module 4 via a signal transmission line. When the signal processing module 4 detects that the environment has returned to normal, the timer chip automatically cuts off the start-up circuit of the alarm trigger module 6 after a set time delay, thus achieving the automatic reset function.

[0037] The data storage module 5 uses a non-volatile memory chip to record the time, location, smoke concentration, temperature changes, and humidity data for each alarm event. This data is connected to the signal processing module 4 via a serial interface and supports subsequent read and export operations, facilitating management personnel to analyze the causes of fires and environmental conditions.

[0038] Through the above steps, this invention achieves highly sensitive detection and rapid response to fire hazards in parking lots. The multi-layer filter unit 8 significantly reduces the interference of dust on smoke detection, the temperature compensation circuit improves the accuracy of temperature measurement, and the humidity correction module 3 effectively reduces the impact of humidity on the detection results. Furthermore, the environmental adaptive module dynamically adjusts the detection sensitivity parameters, further enhancing the device's adaptability to complex environments and meeting the parking lot's needs for real-time monitoring and rapid response.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic fire alarm device for parking lots, characterized in that, It includes a smoke sensing module (1), a temperature sensing module (2), a humidity correction module (3), a signal processing module (4), a data storage module (5), an alarm triggering module (6), and a reset control module (7); The smoke sensing module (1) and temperature sensing module (2) respectively collect smoke concentration signals and temperature change signals in the parking lot, and transmit the collected signals to the signal processing module (4); The humidity correction module (3) collects the ambient humidity signal and sends it to the signal processing module (4) for correction; The signal processing module (4) compares the corrected signal with the preset threshold and then transmits it to the data storage module (5) for recording. The data storage module (5) transmits the recorded data to the alarm triggering module (6); The signal processing module (4) is connected to the reset control module (7) through its output terminal, and is used to cut off the start-up circuit of the alarm trigger module (6) in abnormal situations.

2. The automatic fire alarm device for parking lots according to claim 1, characterized in that: It also includes an environment adaptation module, which dynamically adjusts the sensitivity parameters of the smoke sensing module (1) and the temperature sensing module (2) by receiving feedback signals from the signal processing module (4); The environment adaptive module is connected to the signal processing module (4) via a wired connection. It has an adjustable resistor circuit inside to adjust the gain value of the input signal.

3. The automatic fire alarm device for parking lots according to claim 1, characterized in that: The smoke sensing module (1) includes a multi-layer filter unit (8) and a photoelectric sensor unit (9), wherein the multi-layer filter unit (8) is disposed at the front end of the photoelectric sensor unit (9); The photoelectric sensor unit (9) includes an infrared light source emitter (10) and a photosensitive receiver (11), and a fixed-angle optical path channel is formed between the infrared light source emitter (10) and the photosensitive receiver (11).

4. The automatic fire alarm device for parking lots according to claim 1, characterized in that: The humidity correction module (3) includes a humidity-sensitive resistor element and a signal amplification circuit. The humidity-sensitive resistor element is installed at the side opening of the alarm device housing. The signal amplification circuit includes a differential amplifier for amplifying the output signal of the humidity-sensitive resistor element.

5. The automatic fire alarm device for parking lots according to claim 1, characterized in that: The signal processing module (4) includes an analog-to-digital conversion unit, a logic judgment unit, and a signal output unit. The analog-to-digital conversion unit converts the analog signal into a digital signal and then transmits it to the logic judgment unit. The logic judgment unit is preset with smoke concentration threshold, temperature change rate threshold and humidity correction coefficient, and generates trigger signal or normal signal by performing logical operations on input signal; The signal output unit transmits the output signal of the logic judgment unit to the data storage module (5) and the alarm triggering module (6), respectively.

6. The automatic fire alarm device for parking lots according to claim 1, characterized in that: The alarm triggering module (6) includes an audible and visual alarm unit and a remote communication unit. The audible and visual alarm unit consists of a buzzer and an LED light. The buzzer and the LED light are respectively connected to the output terminal of the signal processing module (4) through a relay. The remote communication unit is connected to the monitoring system of the parking lot management center through a wireless communication module.

7. The automatic fire alarm device for parking lots according to claim 1, characterized in that: The reset control module (7) includes a manual reset switch and an automatic reset circuit. The manual reset switch is installed on the front of the housing of the alarm device. The automatic reset circuit is equipped with a timer chip, which is connected to the signal processing module (4) via a signal transmission line.

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