阅读说明：本技术 一种温度传感器以及火灾报警装置 (Temperature sensor and fire alarm device ) 是由 王咏涛 纪超群 于 2021-07-02 设计创作，主要内容包括：本申请的实施例提供了一种温度传感器以及火灾报警装置,涉及消防设备技术领域,该温度传感器包括：广角镜头和二极管阵列,广角镜头用于引入周围环境的红外光至二极管阵列,二极管阵列用于将红外光转换为温度信号；广角镜头的中心线和二极管的中心线位于同一直线,二极管阵列中的二极管由砷化铟镓材料制成。本申请能够扩大温度传感器的检测范围、提高温度传感器的检测精度和灵敏度。(The embodiment of the application provides a temperature sensor and fire alarm device, relates to fire-fighting equipment technical field, and this temperature sensor includes: the infrared temperature sensor comprises a wide-angle lens and a diode array, wherein the wide-angle lens is used for introducing infrared light of the surrounding environment to the diode array, and the diode array is used for converting the infrared light into a temperature signal; the central line of the wide-angle lens and the central line of the diode are positioned on the same straight line, and the diode in the diode array is made of indium gallium arsenide materials. The temperature sensor detection method and the temperature sensor detection device can enlarge the detection range of the temperature sensor and improve the detection precision and sensitivity of the temperature sensor.)

1. A temperature sensor, comprising:

a wide-angle lens (11) and a diode array (12), the wide-angle lens (11) is used for introducing infrared light of the surrounding environment to the diode array (12), and the diode array (12) is used for converting the infrared light into a temperature signal;

the central line of the wide-angle lens (11) and the central line of the diode are positioned on the same straight line, and the diode in the diode array (12) is made of indium gallium arsenide materials.

2. The temperature sensor of claim 1, wherein: the diode array (12) has a plurality of arrangements.

3. The temperature sensor of claim 1, wherein: the light sensing area of the wide-angle lens (11) is 0-150 degrees.

4. The temperature sensor of claim 3, wherein: the wide-angle lens (11) comprises three lenses with different radians, and the diodes are positioned between a first focal length and a second focal length of the lenses close to the diode array (12).

5. The temperature sensor of claim 1, wherein: the temperature sensor also comprises an amplifying circuit (13), wherein the amplifying circuit (13) is connected with the diode array (12) and is used for amplifying the temperature signal.

6. A fire alerting device characterized by comprising:

the temperature sensor (1) of any one of claims 1 to 4, the temperature sensor (1) being adapted to collect and convert infrared light into a temperature signal;

the A/D conversion module (2) is connected with the diode array (12) in the temperature sensor (1), and the A/D conversion module (2) is used for converting the temperature signal output by the temperature sensor (1) into a digital signal;

the central control module (3) analyzes the digital signals output by the A/D conversion module (2) and sends corresponding instructions according to different temperature information;

and the alarm device (4) receives the instruction sent by the central control module (3) and makes corresponding action.

7. A fire alerting device as defined in claim 6, wherein: the alarm device is characterized by further comprising an alarm control module (5), wherein the alarm control module (5) receives the instruction sent by the central control module (3) and transmits alarm information to the alarm device (4).

8. A fire alerting device characterized by comprising:

the temperature sensor (1) of claim 5, the temperature sensor (1) being adapted to collect and convert infrared light into a temperature signal;

the A/D conversion module (2) is connected with an amplifying circuit (13) in the temperature sensor (1), and the A/D conversion module (2) is used for converting the temperature signal output by the temperature sensor (1) into a digital signal;

the central control module (3) analyzes the digital signals output by the A/D conversion module (2) and sends corresponding instructions according to different temperature information;

and the alarm device (4) receives the instruction sent by the central control module (3) and makes corresponding action.

9. A fire alerting device as defined in claim 8, wherein: the alarm device is characterized by further comprising an alarm control module (5), wherein the alarm control module (5) receives the instruction sent by the central control module (3) and transmits alarm information to the alarm device (4).

Technical Field

The application relates to the technical field of fire-fighting equipment, in particular to a temperature sensor and a fire alarm device.

Background

The traditional temperature sensor mainly comprises a contact temperature sensor and a non-contact temperature sensor, and the two sensors have the problems of narrow detection range, low detection precision, low detection sensitivity and the like in the use process.

Disclosure of Invention

In order to enlarge the detection range of the temperature sensor and improve the detection precision and sensitivity of the temperature sensor, the application provides the temperature sensor and the fire alarm device.

The application provides a temperature sensor and fire alarm device adopts following technical scheme:

in a first aspect of the present application, there is provided a temperature sensor comprising:

the infrared temperature sensor comprises a wide-angle lens and a diode array, wherein the wide-angle lens is used for introducing infrared light of the surrounding environment to the diode array, and the diode array is used for converting the infrared light into a temperature signal;

the center line of the wide-angle lens and the center line of the diode are located on the same straight line, and the diode in the diode array is made of indium gallium arsenide materials.

By adopting the scheme, the wide-angle lens is used for collecting infrared light, and the wide-angle lens has a large photosensitive range, so that the ambient infrared light can be collected to the greatest extent, the detection range of the temperature sensor is improved, the indium gallium arsenide material has high sensitivity in a temperature area of 0-1400 ℃, and a diode made of the indium gallium arsenide material can accurately detect the high temperature of 0-1400 ℃, and the detection accuracy of the temperature sensor in a high-temperature environment is improved.

Preferably, the arrangement mode of the diode array can be adjusted.

By adopting the scheme, the array area of the sensor can be adjusted according to the specific detection area, so that the temperature sensor can effectively detect the change of the ambient temperature.

Preferably, the light sensing area of the wide-angle lens is 0-150 degrees.

Preferably, the wide-angle lens comprises three lenses with different radians, and the diodes are positioned between a first focal length and a second focal length of the lenses close to the diode array.

By adopting the scheme, the diode array can collect infrared light gathered by the wide-angle lens to the maximum extent, and the detection precision of the temperature sensor is improved.

Preferably, the temperature sensor further comprises an amplifying circuit, wherein the amplifying circuit is connected with the diode array and is used for amplifying the temperature signal.

By adopting the scheme, the amplifying circuit amplifies the temperature signal output by the diode array, so that the detection precision of the temperature signal is improved, and the subsequent analysis of the temperature information is more accurate.

In a second aspect of the present application, there is provided a fire alarm device including:

the temperature sensor is used for collecting and converting infrared light into a temperature signal;

the A/D conversion module is connected with a diode array in the temperature sensor and is used for converting a temperature signal output by the temperature sensor into a digital signal;

the central control module analyzes the digital signals output by the A/D conversion module and sends corresponding instructions according to different temperature information;

and the alarm device receives the instruction sent by the central control module and makes corresponding action.

By adopting the scheme, the temperature sensor adopts the wide-angle lens to collect surrounding infrared light, so that the detection area of the fire alarm device is enlarged, and the indium gallium arsenide material is used for manufacturing the diode, and the indium gallium arsenide material has high sensitivity in the temperature area of 0-1400 ℃, so that the diode made of the indium gallium arsenide material can accurately detect the high temperature of 0-1400 ℃, thereby improving the detection temperature range and the detection precision of the fire alarm device.

Preferably, the alarm device further comprises an alarm control module, wherein the alarm control module receives the instruction sent by the central control module and transmits alarm information to the alarm device.

In a third aspect of the present application, there is provided another fire alarm device including:

the temperature sensor is used for collecting and converting infrared light into a temperature signal;

the A/D conversion module is connected with an amplifying circuit in the temperature sensor and is used for converting a temperature signal output by the temperature sensor into a digital signal;

the central control module analyzes the digital signals output by the A/D conversion module and sends corresponding instructions according to different temperature information;

and the alarm device receives the instruction sent by the central control module and makes corresponding action.

By adopting the scheme, the temperature sensor adopts the wide-angle lens to collect surrounding infrared light, so that the detection area of the fire alarm device is enlarged, the indium gallium arsenide material is used for manufacturing the diode, the indium gallium arsenide material has high sensitivity in the temperature area of 0-1400 ℃, so that the diode made of the indium gallium arsenide material can accurately detect the high temperature of 0-1400 ℃, the temperature detection range and the detection precision of the fire alarm device are improved, the amplifying circuit amplifies the temperature signal output by the diode array and transmits the amplified temperature signal to the A/D conversion module, the conversion precision of the A/D conversion module is improved, the follow-up analysis on the temperature information is more accurate, and the reliability of the fire alarm device is improved.

Preferably, the alarm device further comprises an alarm control module, wherein the alarm control module receives the instruction sent by the central control module and transmits alarm information to the alarm device.

It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

FIG. 1 is a schematic diagram of a temperature sensor in an embodiment of the present application;

FIG. 2 is a schematic diagram of a noise reduction circuit in an embodiment of the present application;

FIG. 3 is a block diagram of a first fire alarm device according to an embodiment of the present application;

fig. 4 is a block diagram of a second fire alarm device in the embodiment of the present application.

Description of reference numerals: 1. a temperature sensor; 11. a wide-angle lens; 12. an array of diodes; 13. an amplifying circuit; 14. a noise reduction circuit; 2. an A/D conversion module; 3. a central control module; 4. an alarm device; 5. an alarm control module; 6. and a display module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Fire alarm usually is used by frequent in the place that the building is intensive, the population is concentrated, the property is concentrated, flammable and explosive material source is many, to different application scenarios, fire alarm needs to possess characteristics such as detection range is big, detection precision is high and sensitivity is high, but the detection range of present majority's fire alarm is narrower and detection precision is not enough to can't accurately play the warning effect fast.

In order to enlarge the detection range of the temperature sensor 1 and improve the detection accuracy and sensitivity of the temperature sensor 1, the present application provides a temperature sensor 1.

Referring to fig. 1, a temperature sensor 1 includes a wide-angle lens 11 and a diode array 12. The wide-angle lens 11 is used to introduce ambient infrared light to the diode array 12, and the diode array 12 is used to convert the infrared light into a temperature signal. In some possible implementations, the wide-angle lens 11 may be a fisheye lens or other lens capable of enlarging the photosensitive area. In some possible implementations, the wide-angle lens 11 has a photosensitive area of 0 to 150 °. In some possible implementations, the temperature sensor 1 further includes a housing having an opening, the diode array 12 is disposed at the bottom of the housing, the wide-angle lens 11 is disposed at the opening of the housing, and the wide-angle lens 11 can introduce external infrared light into the housing and make the infrared light irradiate the diode array 12.

In order to enable the infrared light introduced by the wide-angle lens 11 to be irradiated to the diode array 12, the center line of the wide-angle lens 11 and the center line of the diode may be located on the same straight line.

The diodes in the diode array 12 are made of indium gallium arsenide material, and the diode array 12 made of indium gallium arsenide material has good detection accuracy and sensitivity to the temperature in the temperature range of 0-1400 ℃, so that the temperature range measured by the temperature sensor 1 is expanded to 0-1400 ℃, and the detection accuracy and sensitivity of the temperature sensor 1 to the temperature in the high-temperature environment are improved.

Because the transmission speed of electrons in the indium gallium arsenide is several times that in the silicon, and the size of the transistor made of the indium gallium arsenide material is only 60 nanometers, the photodiode made of the indium gallium arsenide material has high sensitivity and small volume, and the sensor made of the indium gallium arsenide material can detect infrared radiation with a specific frequency spectrum in the 0.9-1.7 micron region. The indium gallium arsenide sensor is tested, and the corresponding frequency spectrum temperature has better temperature curve change between 100 ℃ and 1600 ℃, so that the indium gallium arsenide sensor has better detection accuracy on the object temperature in the temperature range. The use of the expandable sensor device can also expand the photosensitive frequency to 0.4-1.7 microns, so that the measurement range reaches 0-1600 ℃. Therefore, the diode array 12 made of the indium gallium arsenide material has the characteristics of high precision and high sensitivity for measuring the temperature in the interval.

In some embodiments, the diodes have a plurality of arrangements, and different arrangements of the diode array 12 can cause the total area thereof to change, and the specific arrangement is not limited in the embodiments of the present application as long as the total area thereof can be changed by different arrangements.

With continued reference to fig. 1, ambient infrared light is introduced by wide-angle lens 11 at diode array 12. It can be seen that different areas of the diode array 12 correspond to different detection areas. For example, a detection area of 50 square meters corresponds to the use of a 10 x 10 mm diode array 12. Different areas of the diode array 12 may be configured for different sensing environments. For example, if the detection environment is doubled, the corresponding diode array 12 also needs to be doubled to ensure that the detector can effectively detect the ambient temperature change.

In some embodiments, the detection accuracy of the temperature sensor 1 is further improved in order to enable the diode array 12 to collect the infrared light collected by the wide-angle lens 11 to the maximum. The wide angle lens 11 may include three lenses of different curvatures, with the largest curvature of the lens away from the diode and the smallest curvature of the lens near the diode. Of course, the size of the light-sensing area of the wide-angle lens 11 can be adjusted by changing the number of lenses of the wide-angle lens 11 and the radian of the lenses according to the actual application.

In some embodiments, to enable the diode array 12 to collect the infrared light collected by the wide-angle lens 11 to the maximum, the diode array 12 is located between one focal length and two focal lengths of the lens of the wide-angle lens 11 close to the diode array 12.

In some embodiments, the temperature sensor 1 may further include an amplifying circuit 13, the amplifying circuit 13 is connected to the diode array 12, and after the diode array 12 converts the infrared light into the temperature signal, the amplifying circuit 13 amplifies the temperature signal, so as to improve the detection precision of the temperature signal, and make the subsequent analysis of the temperature signal more accurate.

In some embodiments, the temperature sensor 1 may further be provided with a noise reduction circuit 14, referring to fig. 2, the interference to sunlight and other light sources is realized through a delay circuit composed of a resistor and a capacitor and the original signal via an and gate. The transient interference of other light sources such as sunlight on the sensor can be further optimized by adjusting the value of RC according to specific conditions. Thereby again improving the detection accuracy of the temperature sensor 1.

In another aspect, the embodiment of the present application further provides a fire alarm device.

Referring to fig. 3, the fire alarm device includes a temperature sensor 1, an a/D conversion module 2, a central control module 3, and an alarm device 4.

The temperature sensor 1 is used to collect and convert ambient infrared light into a temperature signal. The temperature sensor 1 includes a wide-angle lens 11 and a diode array 12. The wide-angle lens 11 is used to introduce ambient infrared light to the diode array 12, and the diode array 12 is used to convert the infrared light into a temperature signal.

The A/D conversion module 2 is used for receiving the temperature signal output by the temperature sensor 1 and converting the temperature signal into a digital signal. The A/D conversion module 2 is connected with the diode array 12 of the temperature sensor 1, the A/D conversion module 2 can adopt an 18-bit high-precision analog-to-digital converter FS511, the FS511 can be used for converting amplified analog signals into digital signals, and the detection precision of 0.01 ℃ can be realized. Analog-digital converters with different bit numbers can be used according to actual conditions, the more the bit number is, the smaller the quantization error is, and the higher the precision is.

The central control module 3 is used for receiving the digital signals output by the A/D conversion module 2, carrying out differential detection by comparing the digital signals with data detected by the surrounding environment to obtain more accurate temperature measurement values, and sending different instructions according to different analysis results by comparing and analyzing the measurement values.

The alarm device 4 is used for receiving the instruction sent by the central control module 3 and making corresponding action. For example, when the central control module 3 compares and analyzes that the temperature of the detection area is abnormal, and the temperature of the detection area suddenly rises, the central control module 3 sends an alarm instruction, and the alarm device 4 gives an alarm after receiving the alarm instruction.

In some embodiments, the temperature sensor 1 may further include a noise reduction circuit 14, the noise reduction circuit 14 is connected to the diode array 12, and interference to sunlight and other light sources is achieved through a delay circuit composed of a resistor and a capacitor and the original signal via an and gate. The transient interference of other light sources such as sunlight on the sensor can be further optimized by adjusting the value of RC according to specific conditions. Thereby improving the detection accuracy of the temperature sensor 1.

In some embodiments, the fire alarm device may further include an alarm control module 5, where the alarm control module 5 is configured to receive an instruction sent by the central control module 3 and send alarm information to the alarm device 4.

In some embodiments, the fire alarm device may further include a display module 6, where the display module 6 is configured to display the temperature information analyzed by the central control module 3, and the temperature information displayed by the display module 6 is viewed to facilitate real-time monitoring of the change of the ambient temperature.

In another aspect, the present disclosure provides another fire alarm device. The fire alarm device is different from the above-described fire alarm device in that the temperature sensor 1 further includes an amplifier circuit 13. In this embodiment, the amplifying circuit 13 is connected to the diode array 12, the a/D conversion module 2 is connected to the amplifying circuit 13 of the temperature sensor 1, when the diode array 12 converts infrared light into a temperature signal, the amplifying circuit 13 amplifies the temperature signal, the amplified temperature signal is denoised by the denoising circuit 14, noise interference in the temperature signal can be effectively filtered, the noise interference is output to the a/D conversion module 2 after denoising, the a/D conversion module 2 converts the amplified temperature signal into a digital signal, the conversion precision of the a/D conversion module 2 is improved, temperature data analyzed by the subsequent central control module 3 is more accurate, and therefore an instruction sent by the central control module 3 is more reliable, and the reliability of the fire alarm is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.