Alarm device and alarm system

Abstract

The utility model provides an alarm device and an alarm system, the alarm device comprises a base, an outer cover and a function part, the outer cover and the base are fixedly connected, and a containing cavity is defined by the outer cover and the base together. The function part is arranged in the containing cavity and comprises a wireless communication module, a control module, at least one alarm module and an external power supply module, and the wireless communication module can be in wireless communication with external equipment. And the control module communicates with the wireless communication module. And the alarm module communicates with the control module and sends out an alarm signal under the control of the control module. And the external power supply module is connected to an external power supply and is electrically connected with the wireless communication module, the control module and the alarm module. According to the embodiment of the utility model, the cable in wired connection is divided into independent wireless communication function and power supply function, and a plurality of alarm devices in the alarm system are connected without using the cable, so that the wiring is simplified, the cost control is facilitated, the limitation of the length of the cable is avoided, and the coverage range of the alarm system can be expanded.

Description

Technical Field

[0001] The utility model generally relates to the technical field of security and fire protection equipment, in particular to an alarm device and an alarm system. Background Art

[0002] In industrial production and residential environments, in order to prevent safety accidents, alarm devices are usually installed to send out alarm signals in case of emergency. Since the alarm signals sent by the alarm devices can only cover a limited range, for large-scale buildings, multiple alarm devices are generally installed at different locations. Multiple alarm devices are combined into an alarm system, which is uniformly controlled by a control center, or multiple alarm devices are controlled by each other.

[0003] In order to ensure that the alarm device can operate stably in an emergency, multiple alarm devices in the alarm system and the control center, or multiple alarm devices are usually connected by wires. The cables include communication cables and power cables. The communication cables are used to transmit control signals to control the alarm device to start or stop, and the power cables can supply power to the alarm device. However, this wired connection method has the defects of complex installation, difficult maintenance, and poor flexibility in terms of wiring. In addition, when an emergency occurs, such as a fire, the line is prone to failure, causing the alarm device to fail to work properly. In particular, when multiple alarm devices are connected in series, multiple alarm devices downstream of the line may fail. Setting up independent cables for each alarm device will further increase the difficulty and cost of wiring.

[0004] The content of the background technology section is merely the technology known to the utility model inventor and does not necessarily represent the prior art in the field. Utility Model Content

[0005] In view of one or more defects in the prior art, the utility model provides an alarm device, comprising:

[0006] Pedestal;

[0007] An outer cover, the outer cover is fixedly connected to the base and together define a cavity; and

[0008] A functional part, the functional part is arranged in the cavity, and the functional part includes:

[0009] A wireless communication module, wherein the wireless communication module is configured to enable wireless communication with an external device;

[0010] a control module, the control module communicating with the wireless communication module;

[0011] at least one alarm module, the alarm module being in communication with the control module and configured to issue an alarm signal under the control of the control module; and

[0012] An external power supply module is connected to an external power source and is electrically connected to the wireless communication module, the control module and the alarm module.

[0013] According to one aspect of the utility model, the functional part further includes:

[0014] An internal power supply module, the internal power supply module is electrically connected to the wireless communication module, the control module and the alarm module, and the internal power supply module is electrically connected to the external power supply module; the internal power supply module includes a rechargeable battery.

[0015] According to one aspect of the utility model, the internal power supply module also includes a monitoring unit, which communicates with the rechargeable battery and also communicates with the external power supply module. The monitoring unit is configured to monitor the power level of the rechargeable battery and can control the external power supply module to charge the rechargeable battery according to the power level of the rechargeable battery.

[0016] According to one aspect of the utility model, the rechargeable battery is configured to supply power to the wireless communication module, the control module and the alarm module; the output voltage of the rechargeable battery is not less than 3 volts; the rechargeable battery is configured to enable the wireless communication module, the control module and the alarm module to operate at full power for not less than 12 hours.

[0017] According to one aspect of the utility model, the internal power supply module further includes a fixing member, and the fixing member is buckled on the rechargeable battery; the wireless communication module includes an antenna.

[0018] According to one aspect of the utility model, the outer cover comprises:

[0019] A side edge, the side edge is fixedly connected to the base and the side edge is circumferentially closed; and

[0020] A top cover is detachably connected to the side edge, and the top cover is located at a side of the side edge away from the base.

[0021] According to one aspect of the utility model, the top cover protrudes from the upper edge of the side, and a plurality of through holes penetrating into the cavity are formed on the top cover; the side and the top cover are both light-transmitting structures.

[0022] According to one aspect of the utility model, the side is non-detachably connected to the base; the inner side and / or outer side of the side is provided with reinforcing ribs; the side is a truncated cone structure or a cylindrical structure, and the top cover is a curved structure.

[0023] According to one aspect of the utility model, the alarm device further comprises:

[0024] A separation detection module communicates with the control module and is configured to send a separation signal through the control module and the wireless communication module when the base is separated from the installation position.

[0025] According to one aspect of the utility model, the utility model also includes an alarm system, the alarm system comprising:

[0026] At least one alarm device as described above, wherein the wireless communication module in the alarm device is configured to receive start / stop signals of the alarm device within the communication range.

[0027] According to one aspect of the utility model, the alarm system includes a plurality of the alarm devices, and the alarm device is configured to be able to send the start-stop signal to other alarm devices.

[0028] According to one aspect of the utility model, the alarm system further comprises a control center, and the control center is configured to send start and stop signals of the alarm device.

[0029] Compared with the prior art, the embodiment of the utility model provides an alarm device, in which a wireless communication module is provided for wireless communication with an external device, for example, it can receive the start and stop signals of the alarm device, and thereby control the alarm module to send an alarm signal. At the same time, an external power supply module is also provided, which is connected to an external power supply. The external power supply does not need to be drawn from the same position, and the external power supply can be selected near the installation position of the alarm device, and the power supply selection of multiple alarm devices can be realized independently of each other. The embodiment of the utility model splits the wired cable into independent wireless communication functions and power supply functions. There is no need to use cables to connect multiple alarm devices in the same alarm system, which simplifies the wiring and can even realize a wiring method without external wiring, which is conducive to controlling costs and is not limited by the length of the cable, and can expand the coverage of the alarm system.

[0030] The utility model also includes an embodiment of an alarm system, which uses the alarm device described in the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural block diagram of the alarm device in some embodiments of the utility model;

[0033] Figure 2AIt is a schematic diagram of an explosion of an alarm device in some embodiments of the utility model;

[0034] Figure 2B It is a schematic diagram of the structure of the alarm device in some embodiments of the utility model;

[0035] Figure 3 It is a structural block diagram of an internal power supply module and an external power supply module in some embodiments of the present utility model;

[0036] Figure 4 It is a schematic diagram of the structure of the outer cover in some embodiments of the utility model;

[0037] Figure 5A and Figure 5B It is a structural block diagram of the alarm system in different embodiments of the present utility model. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0040] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", 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, an electrical connection, or mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0043] The following describes embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] Figure 1 , Figure 2A and Figure 2B The structure of the alarm device 100 according to the embodiment of the utility model is shown below. Figure 1 The alarm device 100 will be described.

[0045] Such as 1. Figure 2A and Figure 2BAs shown, the alarm device 100 includes a base 110, an outer cover 120 and a functional part 130, wherein the outer cover 120 and the base 110 are fixedly connected and jointly define a cavity, for example, the base 110 is configured as a hollow groove, or a flat plate shape, and the outer cover 120 is configured as an inverted bowl shape, and the outer cover 120 and the base 110 are fixedly arranged together to form a cavity in the middle.

[0046] The functional part 130 is disposed inside the cavity. Furthermore, the functional part 130 may be configured to be fixedly connected to the base 110 to maintain fixation.

[0047] like Figure 1 As shown, the functional part 130 includes a wireless communication module 131, a control module 132, at least one alarm module 133 and an external power supply module 134. The wireless communication module 131 is configured to be able to communicate wirelessly with external devices, and the external devices include, for example, other alarm devices, a control center, a user terminal, or different types of sensors. The wireless communication module 131 can receive signals from external devices, such as signals for controlling the alarm device 100 to start or stop. Preferably, the wireless communication module 131 can also be configured to be able to send signals to external devices, such as uploading a signal of the operating status of the alarm device 100 to the control center or the user terminal, or sending a start or stop signal to other alarm devices.

[0048] The control module 132 communicates with the wireless communication module 131. For example, the control module 132 is integrated on a circuit board. The wireless communication module 131 may include an antenna, such as a spiral antenna, which is connected to the circuit board. Signal analysis of wireless communication between the alarm device 100 and the external device may be performed by the control module 132 or by the wireless communication module 131, and the signal is transmitted to the control module 132 after analysis.

[0049] The alarm module 133 communicates with the control module 132 and is configured to send out an alarm signal under the control of the control module 132. The alarm module 133 includes, for example, a light emitter or a buzzer. The alarm signal may be a light signal or a sound signal to alert people within the alarm range. For example, when the control module 132 obtains a start signal from an external device through the wireless communication module 131, the light emitter or buzzer in the alarm module 133 may be controlled to start and send out an alarm signal.

[0050] When the functional part 130 includes multiple alarm modules 133, the multiple alarm modules 133 can be controlled independently, for example, the control module 132 controls one or part of the multiple alarm modules 133 to start or stop, for example, to prevent the alarm signal from causing secondary disasters, control part of the alarm modules 133 to stop. The multiple alarm modules 133 can also be controlled by the control module 132 to start or stop at the same time.

[0051] The external power supply module 134 is connected to an external power supply, and the external power supply module 134 is electrically connected to the wireless communication module 131, the control module 132 and the alarm module 133, and the external power supply supplies power to the wireless communication module 131, the control module 132 and the alarm module 133 through the external power supply module 134. Specifically, for example, the external power supply module 134 includes a wiring port and a voltage stabilizer, and the external power supply can be connected to the wiring port through a connecting line, and supply power to the wireless communication module 131, the control module 132 and the alarm module 133 through the wiring port. The external power supply can be any power supply within the installation scene of the alarm device 100, and it is preferred to select an external power supply near the installation location of the alarm device 100 to shorten the length of the connecting line and improve stability, so as to avoid failure or damage of the connecting line in an emergency, thereby causing the alarm device 100 to fail.

[0052] The embodiment of the utility model does not need to set up communication cables. In an alarm system, multiple alarm devices 100 do not need to be connected by wires. The alarm device 100 can select an external power supply nearby, which can greatly save production costs. In an emergency, the stability is higher and the failure of multiple alarm devices 100 connected in series can be prevented. In addition, it is conducive to increasing the coverage of the alarm system, is not limited by the length of the cable, and can connect more alarm devices 100 to the same alarm system.

[0053] like Figure 1 As shown, according to a preferred embodiment of the utility model, the functional part 130 also includes an internal power supply module 135, the internal power supply module 135 is electrically connected to the wireless communication module 131, the control module 132 and the alarm module 133, and the internal power supply module 135 is also electrically connected to the external power supply module 134. The internal power supply module 135 includes a rechargeable battery 1351. When the external power supply module 134 can supply power normally, it can supply power to the wireless communication module 131, the control module 132 and the alarm module 133, and charge the rechargeable battery 1351 at the same time. When the external power supply module 134 cannot supply power normally, for example, the external power supply is powered off, the internal power supply module 135 can supply power to the wireless communication module 131, the control module 132 and the alarm module 133, ensuring that the wireless communication module 131, the control module 132 and the alarm module 133 can operate normally in a short time. In this embodiment, by setting the internal power supply module 135, the stability of the alarm device 100 in an emergency situation can be improved, and an alarm signal can be issued even when the external power supply cannot produce power.

[0054] Further, such as Figure 3As shown, in a preferred embodiment of the utility model, the internal power supply module 135 also includes a monitoring unit 1352, and the monitoring unit 1352 communicates with the rechargeable battery 1351 and also communicates with the external power supply module 134. The monitoring unit 1352 is configured to monitor the power of the rechargeable battery 1351, and according to the power of the rechargeable battery 1351, control the external power supply module 134 to charge the rechargeable battery 1351. When the rechargeable battery 1351 is not discharged to the outside, the power is gradually consumed at a slower rate. The monitoring unit 1352 can also be used to monitor the power of the rechargeable battery 1351, for example, the monitoring unit 1352 monitors the voltage of the rechargeable battery 1351, and when the power of the rechargeable battery 1351 is reduced to a threshold value, the external power supply module 134 charges the rechargeable battery 1351.

[0055] In different embodiments of the present invention, it can also be configured that the external power supply module 134 continuously supplies power to the rechargeable battery 1351 .

[0056] Specifically, in the preferred embodiment of the utility model, when the rechargeable battery 1351 supplies power to the wireless communication module 131, the control module 132 and the alarm module 133, the output voltage is not less than 3 volts, and the rechargeable battery 1351 is configured to enable the wireless communication module 131, the control module 132 and the alarm module 133 to operate at full power for not less than 12 hours. In this way, the rechargeable battery 1351 can meet the use requirements, and can still ensure the normal operation of the alarm device 100 for at least 12 hours in the case of power failure of the external power supply, providing time for the staff to restore the external power supply.

[0057] According to some embodiments of the present invention, Figure 2A As shown, the internal power supply module 135 also includes a fixing member 1353, which is buckled on the rechargeable battery 1351 and is used to fix the rechargeable battery 1351. During the normal use of the alarm device 100, the rechargeable battery 1351 supplies power to the wireless communication module 131, the control module 132 and the alarm module 133 when the external power supply is powered off, and does not discharge to the outside under other circumstances. The limit on the number of charge and discharge times of the rechargeable battery 1351 has little effect on the rechargeable battery 1351, and the service life of the rechargeable battery 1351 can cover the service life of the alarm device 100. The rechargeable battery 1351 is preferably permanently fixed between the base 110 and the outer cover 120 and cannot be removed to avoid misoperation or loss of the rechargeable battery 1351.

[0058] Furthermore, in a preferred embodiment of the present invention, the outer cover 120 may also be configured to be non-detachably connected to the base 110 , so as to further improve the structural stability of the alarm device 100 and reduce the impact of the external environment on the interior of the alarm device 100 .

[0059] like Figure 2A and Figure 2B As shown, according to a preferred embodiment of the present invention, the outer cover 120 includes a side 121 and a top cover 122, wherein the side 121 is fixedly connected to the base 110, preferably, is non-detachably connected to the base 110. The side 121 is circumferentially closed, for example, the base 110 is configured to be substantially circular, and the side 121 can be configured to be a continuous ring, surrounding the circumference of the base 110. The side 121 can also shrink in a direction away from the base 110 to further improve the structural stability of the outer cover 120.

[0060] In some embodiments of the present invention, the side 121 and the base 110 are non-detachably connected, for example, by bonding or fixing with bolts. Figure 2A and Figure 2B Reinforcement ribs are provided on the inner and / or outer sides of the side 121 to prevent the side 121 from being damaged due to excessive local stress caused by different deformation coefficients of the side 121 and the base 110 due to changes in the external environment.

[0061] The top cover 122 is arranged on a side of the side 121 away from the base 110 and is detachably connected to the side 121. After removing the top cover 122, the internal alarm module 133 can be checked or replaced. The top cover 122 is a wearing part, so it is easy to replace the damaged top cover 122.

[0062] In some embodiments of the present invention, Figure 4 As shown, the top cover 122 is configured to protrude from the upper edge of the side 121, and a plurality of through holes penetrating into the cavity are provided on the top cover 122, and both the side 121 and the top cover 122 are configured to be light-transmitting structures. In this embodiment, the alarm module 133 includes a light emitter and a buzzer sheet, and a plurality of through holes penetrating into the cavity are provided on the top cover 122 to facilitate the transmission of the acoustic signal to the external environment, and the side 121 and the top cover 122 are configured to be light-transmitting structures to facilitate the transmission of the optical signal to the external environment. The top cover 122 is configured to protrude from the upper edge of the side 121, which can increase the diffusion angle of the acoustic signal and the optical signal and increase the coverage of the alarm signal.

[0063] Furthermore, the side 121 is configured as a truncated cone or cylindrical structure, and the top cover 122 is configured as a curved structure, which can improve the structural stability of the outer cover 120, enable the outer cover 120 to withstand a certain external force impact, and ensure that the alarm device 100 can operate normally in an emergency.

[0064] like Figure 1As shown, according to a preferred embodiment of the present utility model, the alarm device 100 further includes a separation detection module 140, which communicates with the control module 132 and is configured to send a separation signal through the control module 132 and the wireless communication module 131 when the base 110 and the installation position of the alarm device 100 are separated. Specifically, for example, the separation detection module 140 includes a pressure-sensitive sensor or an electrical connection sensor arranged between the base 110 and the installation position, which is used to detect whether the alarm device 100 is in a preset installation position, and when it is separated from the installation position, a separation signal is sent, for example, to report to the staff that the corresponding alarm device 100 may be displaced and needs to be repaired.

[0065] The utility model also includes an embodiment of an alarm system 1, wherein the alarm system 1 includes at least one alarm device 100 as described in the aforementioned embodiment, and the wireless communication module 131 in the alarm device 100 is configured to receive a start / stop signal of the alarm device 100 within a communication range, and the alarm device 100 can start or stop according to the start / stop signal.

[0066] Specifically, Figure 5A As shown, the alarm system 1 includes a plurality of the aforementioned alarm devices 100, and the alarm device 100 is configured to be able to send a start-stop signal to other alarm devices 100. When one alarm device 100 in the alarm system 1 receives the start-stop signal, the alarm device 100 can send a start-stop signal to other alarm devices 100. For example, in a production safety system, a monitoring device is provided at a certain location, such as a sensor for monitoring the leakage of dangerous gases. The sensor can send a start-stop signal to the alarm device 100. When a dangerous gas leak occurs, the sensor sends a start signal to the alarm device 100. At the same time, due to the limited range of wireless communication, the communication range of the sensor may not cover all the alarm devices 100 in the alarm system 1. The start signal can be transmitted to multiple alarm devices 100 through communication between the alarm devices 100, thereby expanding the coverage of the alarm system 1. Alternatively, the alarm device 100 can be used as a signal repeater through network expansion, such as setting a signal repeater separately, or using the alarm device 100 as a signal repeater to expand the communication distance of the start signal.

[0067] In other embodiments of the present invention, Figure 5BAs shown, the alarm system 1 also includes a control center 200, which is configured to send a start / stop signal of the alarm device 100, and the alarm system 1 can receive the start / stop signal and start or stop. For example, in a fire alarm system, the control center 200 communicates with multiple sensors, such as smoke sensors, temperature sensors, light sensors, etc. The control center 200 can aggregate the signals of all sensors and determine whether a fire has occurred based on a preset algorithm. When a fire occurs, a start signal of the alarm device 100 is sent, and the alarm device 100 starts after receiving the start signal. When the danger is eliminated, the control center 200 can send a stop signal, and the alarm device 100 stops after receiving the stop signal. In this embodiment, the alarm device 100 can also send a start / stop signal to the outside to expand the coverage of the alarm system 1.

[0068] Finally, it should be noted that the above description is only an embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An alarm device, characterized in that: include: Pedestal; An outer cover, the outer cover is fixedly connected to the base and together define a cavity; and A functional part, the functional part is arranged in the cavity, and the functional part includes: A wireless communication module, wherein the wireless communication module is configured to enable wireless communication with an external device; a control module, the control module communicating with the wireless communication module; at least one alarm module, the alarm module being in communication with the control module and configured to issue an alarm signal under the control of the control module; and An external power supply module is connected to an external power source and is electrically connected to the wireless communication module, the control module and the alarm module.

2. The alarm device according to claim 1, characterized in that: The functional unit also includes: An internal power supply module, the internal power supply module is electrically connected to the wireless communication module, the control module and the alarm module, and the internal power supply module is electrically connected to the external power supply module; the internal power supply module includes a rechargeable battery.

3. The alarm device according to claim 2, characterized in that: The internal power supply module also includes a monitoring unit, which communicates with the rechargeable battery and also communicates with the external power supply module. The monitoring unit is configured to monitor the power level of the rechargeable battery and can control the external power supply module to charge the rechargeable battery according to the power level of the rechargeable battery.

4. The alarm device according to claim 3, characterized in that: The rechargeable battery is configured to supply power to the wireless communication module, the control module and the alarm module; the output voltage of the rechargeable battery is not less than 3 volts; the rechargeable battery is configured to enable the wireless communication module, the control module and the alarm module to operate at full power for not less than 12 hours.

5. The alarm device according to claim 2, characterized in that: The internal power supply module also includes a fixing member, and the fixing member is buckled on the rechargeable battery; the wireless communication module includes an antenna.

6. The alarm device according to any one of claims 1 to 5, characterized in that: The outer cover comprises: A side edge, the side edge is fixedly connected to the base and the side edge is circumferentially closed; and A top cover is detachably connected to the side edge, and the top cover is located at a side of the side edge away from the base.

7. The alarm device according to claim 6, characterized in that: The top cover protrudes from the upper edge of the side, and a plurality of through holes penetrating into the cavity are formed on the top cover; the side and the top cover are both light-transmitting structures.

8. The alarm device according to claim 6, characterized in that: The side is non-detachably connected to the base; the inner side and / or outer side of the side is provided with reinforcing ribs; the side is a truncated cone structure or a cylindrical structure, and the top cover is a curved structure.

9. The alarm device according to any one of claims 1 to 5, characterized in that: Also includes: A separation detection module communicates with the control module and is configured to send a separation signal through the control module and the wireless communication module when the base is separated from the installation position.

10. An alarm system, characterized in that: include: At least one alarm device according to any one of claims 1 to 9, wherein the wireless communication module in the alarm device is configured to receive start and stop signals of the alarm device within the communication range.

11. The alarm system according to claim 10, characterized in that: It comprises a plurality of the alarm devices, and each alarm device is configured to be able to send the start-stop signal to other alarm devices.

12. The alarm system according to claim 10, characterized in that: It also includes a control center, which is configured to send start and stop signals of the alarm device.

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