Manual alarm button system based on distributed optical fiber temperature measurement

Abstract

The present invention relates to a manual alarm button system based on distributed optical fiber temperature measurement. It solves technical problems such as the unreasonable design of existing manual alarm buttons. It comprises a temperature measurement host, to which at least one temperature measurement circuit is connected, each temperature measurement circuit has an optical cable, and the optical cables are connected in series with a number of heated manual alarm button assemblies. The advantages are: 1. The use of non-metallic materials for temperature-sensing optical cables or transmission optical cables can effectively avoid lightning strikes or induced lightning. 2. The manual alarm button has a simple structure and excellent waterproof performance, which can effectively avoid corrosion caused by condensation or high air humidity, system failure, and the like. 3. When the manual alarm button is in standby mode, it does not consume power and has extremely low power consumption. The number of connections for a single circuit of the distributed optical fiber temperature measurement manual alarm button system is only affected by the performance of the distributed optical fiber temperature measurement host. In theory, many manual alarm buttons can be connected.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical fiber temperature measurement equipment, and in particular relates to a distributed optical fiber temperature measurement-based manual alarm button system. Background Art

[0002] Traditional manual call point systems primarily consist of a fire alarm control panel, a manual call point, and shielded twisted-pair (STP) cabling (return line). The fire alarm control panel transmits power and signals to the manual call point via the STP. When a fire is detected and the call point is manually pressed, the STP detects a short circuit and transmits the alarm signal and its address back to the fire alarm control panel via the STP. The fire alarm control panel then issues the alarm signal and the call point address. This traditional system has the following drawbacks: 1. This system relies on wired transmission of electrical signals. When deployed in outdoor or underground facilities such as highway tunnels, power tunnels, and urban utility corridors, many projects involve laying some STP cabling outdoors. During thunderstorms, this can easily induce lightning on the line, causing damage to the fire alarm control panel, manual call point, or wiring, resulting in severe property damage and, in severe cases, casualties. 2. These underground facilities often experience significant water seepage, condensation, or high humidity, which can corrode or condense the electronic components within the manual call point, causing system failure, significant maintenance costs, and reduced system uptime. 3. There is a weak current when the manual alarm button is in standby state, and a larger current when in alarm state. In addition, the communication bandwidth of the loop line limits the transmission distance of a loop line and the number of manual alarm buttons that can be connected is limited. Summary of the Invention

[0003] The purpose of the present invention is to address the above problems and provide a distributed optical fiber temperature measurement manual alarm button system to overcome the poor lightning resistance and waterproof performance of traditional manual alarm button systems.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: This distributed optical fiber temperature measurement type manual alarm button system includes a temperature measurement host, and the temperature measurement host is connected to at least one temperature measurement circuit. It is characterized in that each temperature measurement circuit has an optical cable, and the optical cable is connected in series with several heated manual alarm button assemblies.

[0005] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, a number of temperature measurement circuits are connected to the temperature measurement host, and the temperature measurement circuits are all connected in parallel to the temperature measurement host, and the heating manual alarm button components in each temperature measurement circuit are respectively and evenly spaced.

[0006] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the temperature measurement host is a distributed temperature measurement host or a fiber grating temperature measurement host.

[0007] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the heated manual alarm button assembly includes a short-circuit button connected to one end of the input power supply, the short-circuit button is connected to one end of the heating plate through a temperature control protection switch, and the other end of the heating plate is connected to the other end of the input power supply. A temperature-sensing structure is provided on the outer side of the heating plate, which can conduct heat with the heating plate when the short-circuit button is turned on, and the temperature-sensing structure is connected to the optical cable.

[0008] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the optical cable is a temperature-sensitive optical cable, the temperature-sensitive optical cable has a plurality of temperature-sensitive optical fibers, and the temperature-sensing structure is an optical fiber temperature measuring ring formed by bending the temperature-sensitive light of the temperature-sensitive optical cable, and the optical fiber temperature measuring ring is located on one side of the heating plate; or, the optical cable is a transmission optical cable, and the temperature-sensing structure is a temperature-sensitive optical fiber Bragg grating connected to the transmission optical cable, and the optical fiber Bragg grating probe of the temperature-sensitive optical fiber Bragg grating is located on one side of the heating plate.

[0009] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the heating manual alarm button assembly also includes a button housing, the short-circuit button is movably arranged on the outside of the button housing and the temperature control protection switch is arranged inside the button housing, the button housing has a heating mounting plate and a temperature sensing mounting plate arranged parallel to each other, and the heating mounting plate and / or the temperature sensing mounting plate are movably arranged in the button housing, the heating plate is installed and fixed on the side of the heating mounting plate close to the temperature sensing mounting plate, the temperature sensing structure is arranged on the side of the temperature sensing mounting plate close to the heating mounting plate, and a sloped elastic abutment structure is provided between the short-circuit button and the button housing, which can keep the heating plate and the temperature sensing structure against each other when the short-circuit button is pressed downward.

[0010] In the above-mentioned manual alarm button system based on distributed optical fiber temperature measurement, the middle part of the heating mounting plate is movably arranged in the button housing through a hinged shaft, the temperature sensing mounting plate is fixedly arranged in the button housing, the heating plate is arranged on the outside of one end of the heating mounting plate, and the temperature sensing structure is arranged on the outside of one end of the temperature sensing mounting plate and corresponds to the heating plate, a gap is formed between the heating mounting plate having one end of the heating mounting plate and the temperature sensing mounting plate having one end of the temperature sensing structure, and a sloped elastic abutment component is provided between the other end of the heating mounting plate and the other end of the temperature sensing mounting plate, which can reduce the gap when the short-circuit button is pressed downward, thereby making the heating plate and the temperature sensing structure abut against each other.

[0011] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the inclined elastic abutment assembly includes a pressure spring arranged between the end of the heating mounting plate away from the heating plate and the button housing, and the end of the short-circuit button located in the button housing is provided with a pressure portion, and the pressure portion is movably inserted between the end of the heating mounting plate with the pressure spring and the end of the temperature sensing mounting plate, and an inclined guide structure is provided between the pressure portion and the heating mounting plate and / or the temperature sensing mounting plate.

[0012] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, the inclined guide structure includes a first inclined surface and a second inclined surface arranged on the upper and lower sides of the top pressure part, and the corresponding sides of the heating mounting plate and the temperature sensing mounting plate are respectively provided with guide inclined surfaces that match the first inclined surface and the second inclined surface.

[0013] In the above-mentioned distributed optical fiber temperature measurement-based manual alarm button system, one side of the button shell is provided with an optical cable interface seat, and the optical cable interface seat has an optical cable inlet pipe, an optical cable inlet and outlet pipe, and an optical cable outlet pipe. The optical cable inlet pipe and the optical cable outlet pipe are distributed in a V shape, and the optical cable inlet and outlet pipes are integrally formed on the outside of the button shell, and the button shell is composed of two left and right half shells, and the optical cable interface seat is composed of interface halves that are respectively integrally formed on one side of the half shells.

[0014] Compared with the existing technology, the advantages of the present invention are:

[0015] 1. Using non-metallic materials for temperature-sensing optical cables or transmission optical cables can effectively avoid lightning strikes or induced lightning.

[0016] 2. The manual alarm button has a simple structure and excellent waterproof performance, which can effectively avoid corrosion and system failure caused by condensation or high air humidity.

[0017] 3. When the manual alarm button is in standby mode, it consumes no power and has extremely low power consumption. The number of connections for a single circuit of a distributed fiber optic temperature measurement manual alarm button system is only affected by the performance of the distributed fiber optic temperature measurement host. In theory, many manual alarm buttons can be connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a system principle block diagram of the present invention.

[0019] Figure 2 It is a principle block diagram of the heated manual alarm button assembly of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the heated manual alarm button assembly of the present invention.

[0021] Figure 4It is a structural sectional view of the heated manual alarm button assembly of the present invention.

[0022] In the figure: temperature measuring host 1, temperature measuring circuit 2, optical cable 21, heated manual alarm button assembly 3, input power supply 31, short-circuit button 32, temperature control protection switch 33, heating plate 34, temperature sensing structure 35, optical fiber temperature measuring ring 36, button shell 4, heating mounting plate 41, temperature sensing mounting plate 42, hinge shaft 43, gap 44, top pressure spring 45, top pressure part 46, inclined guide structure 47, first inclined surface 471, second inclined surface 472, guide inclined surface 473, optical cable interface seat 48, optical cable introduction pipe 481, optical cable inlet and outlet pipe 482, optical cable outlet pipe 483, half shell 49, interface half body 491. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-2 As shown, the distributed optical fiber temperature measurement-based manual alarm button system in this embodiment includes a temperature measurement host 1, which can be a distributed temperature measurement host or a fiber Bragg grating temperature measurement host. The temperature measurement host 1 is connected to a plurality of temperature measurement loops 2 arranged in parallel. Each temperature measurement loop 2 has an optical cable 21, and a plurality of heated manual alarm button assemblies 3 are sequentially connected in series on the optical cables 21. The heated manual alarm button assemblies 3 in each temperature measurement loop 2 are arranged in equal intervals.

[0025] Preferably, the heated manual alarm button assembly 3 here includes a short-circuit button 32 connected to one end of the input power supply 31, the short-circuit button 32 is connected to one end of the heating plate 34 through a temperature control protection switch 33, and the other end of the heating plate 34 is connected to the other end of the input power supply 31, and a temperature sensing structure 35 is provided on the outer side of the heating plate 34, which can conduct heat with the heating plate 34 when the short-circuit button 32 is turned on, and the temperature sensing structure 35 is connected to the optical cable 21.

[0026] Among them, the optical cable 21 is a temperature-sensitive optical cable, which has several temperature-sensitive optical fibers, and the temperature-sensing structure 35 is an optical fiber temperature measuring ring 36 formed by bending the temperature-sensing light of the temperature-sensing optical cable, and the optical fiber temperature measuring ring 36 is located on one side of the heating plate 34; the heating plate 34 and the temperature-sensing structure 35 here can be connected by direct contact. For example, the heating plate 34 here is a sheet-shaped waterproof heating plate with a side length of about 8 cm, and the optical fiber is coiled on a prefabricated disk on the outer surface of the heating plate with a diameter of 6 cm. When the button is pressed, the heating plate heats up, causing the optical fiber to heat, thereby triggering the distributed optical fiber temperature measurement system to send an alarm signal, and the sealed temperature control protection switch is used to prevent the heating plate from overheating. Alternatively, the optical cable 21 is a transmission optical cable, and the temperature-sensing structure 35 is a temperature-sensing optical fiber Bragg grating connected to the transmission optical cable, and the optical fiber Bragg grating probe of the temperature-sensing optical fiber Bragg grating is located on one side of the heating plate 34.

[0027] This embodiment utilizes a quasi-distributed fiber optic temperature measurement system based on distributed fiber optic temperature measurement or fiber Bragg grating (FBG). The heated manual alarm button assembly 3 is primarily connected to the temperature measurement host 1 via a communication fiber, effectively isolating it from lightning strikes and induced lightning. Furthermore, the heated manual alarm button assembly 3 requires only a single input power source, which can be sourced from a nearby source, such as mains electricity, direct current (DC), or a battery. The distributed fiber optic temperature measurement manual alarm button system is primarily based on the precise temperature measurement and accurate positioning characteristics of distributed fiber optic temperature measurement. When the short-circuit button 32 is manually pressed, the circuit of the heated manual alarm button assembly 3 is energized, and the heating plate 34 heats the fiber ring or fiber Bragg grating (FBG) within the manual alarm button. The distributed fiber optic temperature measurement system can accurately and in real time detect the temperature and position of this section of the fiber ring. When the fiber temperature or temperature rise reaches the alarm threshold set by the system, the distributed fiber optic temperature measurement system issues an alarm signal. A distributed fiber optic host can be connected to multiple temperature-sensing or transmission cables to form multiple detection loops.

[0028] like Figure 2-4As shown, the heated manual alarm button assembly 3 here also includes a button housing 4, a short-circuit button 32 movably arranged outside the button housing 4, and a temperature control protection switch 33 arranged inside the button housing 4. The button housing 4 has a heating mounting plate 41 and a temperature sensing mounting plate 42 arranged parallel to each other, and the heating mounting plate 41 and / or the temperature sensing mounting plate 42 are movably arranged inside the button housing 4. The heating plate 34 is fixed to the side of the heating mounting plate 41 near the temperature sensing mounting plate 42, and the temperature sensing structure 35 is arranged on the side of the temperature sensing mounting plate 42 near the heating mounting plate 41. A sloped elastic abutment structure is provided between the short-circuit button 32 and the button housing 4, which can keep the heating plate 34 and the temperature sensing structure 35 in contact with each other when the short-circuit button 32 is pressed downward. In other words, the heating plate 34 and the temperature sensing structure 35 here only contact each other when the short-circuit button 32 is pressed downward, because when the short-circuit button 32 is not pressed and the circuit is not conductive, the heating plate 34 does not generate heat. In addition, the temperature control protection switch 33 and the heating plate 34 are both encapsulated in the button housing, which has a simple structure, is not afraid of water vapor, and has high reliability.

[0029] Among them, the middle part of the heating mounting plate 41 here is movably set in the button housing 4 through the hinge shaft 43, the temperature sensing mounting plate 42 is fixedly set in the button housing 4, the heating plate 34 is set on the outside of one end of the heating mounting plate 41, and the temperature sensing structure 35 is set on the outside of one end of the temperature sensing mounting plate 42 and corresponds to the heating plate 34, and a gap 44 is formed between one end of the heating mounting plate 41 having the heating plate 34 and one end of the temperature sensing mounting plate 42 having the temperature sensing structure 35, and a sloped elastic abutment component is provided between the other end of the heating mounting plate 41 and the other end of the temperature sensing mounting plate 42, which can reduce the gap 44 when the short-circuit button 32 is pressed downward, so that the heating plate 34 and the temperature sensing structure 35 abut against each other.

[0030] Preferably, the inclined elastic abutment assembly includes a pressing spring 45 provided between the end of the heating mounting plate 41 away from the heating plate 34 and the button housing 4, and a pressing portion 46 is provided at one end of the short-circuit button 32 located in the button housing 4, and the pressing portion 46 is movably inserted between the end of the heating mounting plate 41 with the pressing spring 45 and one end of the temperature-sensing mounting plate 42, and an inclined guide structure 47 is provided between the pressing portion 46 and the heating mounting plate 41 and / or the temperature-sensing mounting plate 42. The inclined guide structure 47 includes a first inclined surface 471 and a second inclined surface 472 provided on the upper and lower sides of the pressing portion 46, and a guide inclined surface 473 matching the first inclined surface 471 and the second inclined surface 472 is provided on the corresponding sides of the heating mounting plate 41 and the temperature-sensing mounting plate 42.

[0031] When the short-circuit button 32 is not pressed, the heating mounting plate 41 and one end of the temperature-sensing mounting plate 42 are not in contact due to the action of the top-pressure spring 45. When the short-circuit button 32 is pressed downward, the heating plate 34 starts to work and generates heat, and at the same time drives the top-pressure portion 46 to move between the heating mounting plate 41 and the temperature-sensing mounting plate 42 to overcome the elastic force of the top-pressure spring 45 so that the heating mounting plate 41 and the temperature-sensing mounting plate 42 contact each other, and the heat generated by the heating plate 34 is transferred to the temperature-sensing structure 35.

[0032] In order to achieve sealing, the button housing 4 here has an optical cable interface seat 48 on one side. The optical cable interface seat 48 has an optical cable introduction tube 481, an optical cable introduction and exit tube 482, and an optical cable outlet tube 483. The optical cable introduction tube 481 and the optical cable outlet tube 483 are arranged in a V shape, and the optical cable introduction and exit tube 482 is integrally formed on the outside of the button housing 4. The button housing 4 is composed of two left and right half-shells 49, and the optical cable interface seat 48 is composed of interface half bodies 491 integrally formed on one side of the half-shells 49. Obviously, the optical cable 21 passes from the optical cable introduction tube 481 into the button housing 4 through the optical cable introduction and exit tube 482 to complete the installation of the temperature sensing structure 35 in the button housing 4, and then passes through the optical cable introduction and exit tube 482 and out of the optical cable outlet tube 483.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0034] Although this document frequently uses terms such as temperature measuring host 1, temperature measuring circuit 2, optical cable 21, heated manual alarm button assembly 3, input power supply 31, short-circuit button 32, temperature control protection switch 33, heating plate 34, temperature sensing structure 35, optical fiber temperature measuring ring 36, button housing 4, heating mounting plate 41, temperature sensing mounting plate 42, hinge shaft 43, gap 44, pressing spring 45, pressing portion 46, inclined guide structure 47, first inclined surface 471, second inclined surface 472, guiding inclined surface 473, optical cable interface seat 48, optical cable inlet pipe 481, optical cable inlet and outlet pipe 482, optical cable outlet pipe 483, half housing 49, and interface half body 491, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A distributed optical fiber temperature measurement type manual alarm button system, comprising a temperature measurement host (1), wherein the temperature measurement host (1) is connected to at least one temperature measurement circuit (2), characterized in that: Each temperature measurement circuit (2) has an optical cable (21), and a plurality of heated manual alarm button assemblies (3) are sequentially connected in series on the optical cable (21); the heated manual alarm button assembly (3) includes a short-circuit button (32) connected to one end of an input power supply (31), the short-circuit button (32) is connected to one end of a heating plate (34) through a temperature control protection switch (33), and the other end of the heating plate (34) is connected to the other end of the input power supply (31), and the heating plate (34) is provided with a circumferential outer side. There is a temperature sensing structure (35) that can conduct heat with the heating plate (34) when the short-circuit button (32) is turned on, and the temperature sensing structure (35) is connected to the optical cable (21); the optical cable (21) is a temperature sensing optical cable, the temperature sensing optical cable has a plurality of temperature sensing optical fibers, and the temperature sensing structure (35) is an optical fiber temperature measuring ring (36) formed by bending the temperature sensing optical cable, and the optical fiber temperature measuring ring (36) is located on one side of the heating plate (34); or, the optical cable (21) is a transmission optical cable, and the temperature sensing structure (35) is a temperature-sensitive fiber Bragg grating connected to a transmission optical cable, and the fiber Bragg grating probe of the temperature-sensitive fiber Bragg grating is located on one side of the heating plate (34); the heated manual alarm button assembly (3) also includes a button housing (4), the short-circuit button (32) is movably arranged outside the button housing (4) and the temperature control protection switch (33) is arranged inside the button housing (4), and the button housing (4) has a heating mounting plate (41) and a temperature-sensitive mounting plate (42) arranged in parallel with each other, and the heating mounting plate (4 1) and / or the temperature-sensing mounting plate (42) are movably arranged in the button housing (4), the heating plate (34) is fixedly mounted on a side of the heating mounting plate (41) close to the temperature-sensing mounting plate (42), the temperature-sensing structure (35) is arranged on a side of the temperature-sensing mounting plate (42) close to the heating mounting plate (41), and an inclined elastic abutment component is provided between the short-circuit button (32) and the button housing (4), which can keep the heating plate (34) and the temperature-sensing structure (35) abutting against each other when the short-circuit button (32) is pressed downward.

2. The distributed optical fiber temperature measurement manual alarm button system according to claim 1 is characterized in that: The temperature measuring host (1) is connected to a plurality of temperature measuring circuits (2), and the temperature measuring circuits (2) are all connected in parallel to the temperature measuring host (1), and the heating manual alarm button components (3) in each temperature measuring circuit (2) are respectively and sequentially distributed at equal intervals.

3. The distributed optical fiber temperature measurement manual alarm button system according to claim 1 or 2, characterized in that: The temperature measurement host (1) is a distributed temperature measurement host or a fiber optic Bragg grating temperature measurement host.

4. The distributed optical fiber temperature measurement manual alarm button system according to claim 1 is characterized in that: The middle portion of the heating mounting plate (41) is movably arranged in the button housing (4) through a hinge shaft (43), the temperature sensing mounting plate (42) is fixedly arranged in the button housing (4), the heating plate (34) is arranged on the outside of one end of the heating mounting plate (41), and the temperature sensing structure (35) is arranged on the outside of one end of the temperature sensing mounting plate (42) and corresponds to the heating plate (34), a gap (44) is formed between one end of the heating mounting plate (41) having the heating plate (34) and one end of the temperature sensing mounting plate (42) having the temperature sensing structure (35), and an inclined elastic abutment component is provided between the other end of the heating mounting plate (41) and the other end of the temperature sensing mounting plate (42), which can reduce the gap (44) when the short-circuit button (32) is pressed downward, thereby causing the heating plate (34) and the temperature sensing structure (35) to abut against each other.

5. The distributed optical fiber temperature measurement manual alarm button system according to claim 1 is characterized in that: The inclined elastic abutment assembly includes a pressing spring (45) arranged between an end of the heating mounting plate (41) away from the heating plate (34) and the button housing (4); an end of the short-circuit button (32) located in the button housing (4) is provided with a pressing portion (46); and the pressing portion (46) is movably inserted between an end of the heating mounting plate (41) having the pressing spring (45) and an end of the temperature sensing mounting plate (42); and an inclined guide structure (47) is provided between the pressing portion (46) and the heating mounting plate (41) and / or the temperature sensing mounting plate (42).

6. The distributed optical fiber temperature measurement manual alarm button system according to claim 5 is characterized in that: The inclined surface guide structure (47) includes a first inclined surface (471) and a second inclined surface (472) arranged on the upper and lower sides of the top pressing portion (46), and the corresponding sides of the heating mounting plate (41) and the temperature sensing mounting plate (42) are respectively provided with guiding inclined surfaces (473) that match the first inclined surface (471) and the second inclined surface (472).

7. The distributed optical fiber temperature measurement manual alarm button system according to claim 1 is characterized in that: The button housing (4) has an optical cable interface seat (48) on one side, and the optical cable interface seat (48) has an optical cable inlet pipe (481), an optical cable inlet and outlet pipe (482), and an optical cable outlet pipe (483). The optical cable inlet pipe (481) and the optical cable outlet pipe (483) are distributed in a V shape, and the optical cable inlet and outlet pipe (482) is integrally formed on the outside of the button housing (4). The button housing (4) is composed of two left and right half-shells (49), and the optical cable interface seat (48) is composed of interface half-bodies (491) integrally formed on one side of each half-shell (49).

Images