KR20130043013A - Apparatus for spreading out sensor node and apparatus for building wireless sensor network having the same - Google Patents

Abstract

PURPOSE: Multiple sensor nodes scattering device and a wireless sensor network construction device including the same are provided to stably collect sensing signals by syntagmatically scattering sensor nodes to the ground. CONSTITUTION: A wireless sensor network construction device(100) includes a plurality of sensor nodes(110) and a sensor node scattering device(120) for scattering the plurality of the sensor nodes. The sensor node scattering device scatters the plurality of the sensor nodes to the ground by using an aircraft or a balloon. When the sensor nodes are arranged on the ground, the sensor nodes construct a wireless network with the sensor node scattering device. The sensor node scattering device syntagmatically scatters the plurality of the sensor nodes at a predetermined height.

Description

Apparatus for spreading out sensor node and apparatus for building wireless sensor network having the same}

The present invention relates to an apparatus for constructing a wireless sensor network. More particularly, in order to construct a wireless sensor network, a plurality of sensor nodes are sprayed in the air at a predetermined height from the ground when the plurality of sensor nodes are sprayed in the air. The present invention relates to a sensor node spreading apparatus and a wireless sensor network construction apparatus including the same, which may be evenly disposed within a predetermined range of the ground.

Wireless sensor network is the core technology of ubiquitous network, which is emerging along with RFID, and is collected by wireless communication by collecting information about specific physical and chemical phenomena by multiple sensor nodes in a certain area. Wireless information collection system that delivers. These wireless sensor networks are expanding their scope from military purposes such as surveillance, location and tracking of objects, to social purposes such as ecological environment surveys, production facility status, and detection of dangerous situations.

The wireless sensor network consists of sensor nodes having a sensor module and a network module, and a large number of sensor nodes are arranged in a target area to form one network that operates organically. Each sensor node collects, processes, and transmits information through sensing, and sensor nodes located in the middle serve as routers for retransmitting received sensing signals.

The sensor node is the most basic component of the wireless sensor network. The biggest advantage over the existing RFID technology is that it configures the optimal network while monitoring the surrounding environment from the sensor node and utilizes the existing wired / wireless communication technology. It is possible to configure.

In the actual construction of the wireless sensor network, not only technical but also economic factors should be considered. The price of the sensor is gradually decreasing as technology advances, but it is necessary not only to lower the price but also to cover the target area where the number of sensor nodes can be obtained by efficiently deploying the sensor nodes. Do.

In order to use a small number of sensor nodes, it is effective to place sensor nodes directly according to the sensing range and communication range of the sensor node. However, most wireless sensor network applications need to deploy a large number of sensor nodes in a wide area. In addition, various studies related to efficient deployment should be conducted on the premise of random spreading of sensor nodes.

In the event that personnel are difficult to enter, such as in hazardous areas, sensor nodes must be quickly deployed through aircraft, appliances, and the like. When spraying the sensor nodes by using an aircraft or an apparatus, it is advantageous to collect information by maintaining a constant placement interval between the sensor nodes.

However, in the conventional case of spraying a plurality of sensor nodes individually, the arrangement intervals between the sensor nodes may vary according to various conditions such as the drop time interval and air flow of the sensor nodes. Is not easy.

In addition, when the distance between the deployment area of the sensor node and the central information processing unit collecting information from the sensor node is far, it may be necessary to relay the detection signal of the sensor node in the middle. Consider using some sensor nodes as a repeater that receives signals in the middle and retransmits them to the central information processing device. However, in this case, the manufacturing cost of the sensor nodes increases, and the power consumption of the sensor nodes increases, so that the sensor nodes can be considered. Can shorten the service life.

The present invention has been made in view of this point, and an object of the present invention is to spread the sensor nodes on the ground by spraying a plurality of sensor nodes in all directions at a predetermined height from the ground at a predetermined interval to the sensor node spreading device To provide.

Another object of the present invention is to provide a wireless sensor network construction apparatus capable of stably collecting detection signals by uniformly distributing the plurality of sensor nodes around sink nodes capable of relaying the detection signals of the plurality of sensor nodes.

In order to achieve the above object of the present invention, the sensor node spreading apparatus according to an embodiment of the present invention, the housing having a plurality of injection holes connected to the pressure chamber and the pressure chamber, the housing so as to be connected to each of the injection holes A plurality of launch tubes coupled to and coupled to the ground and disposed on the ground to form a wireless sensor network; and a propulsion pressure for launching the plurality of sensor nodes coupled to the respective launch tubes from the respective launch tubes. And an inflator formed to generate within.

According to an example related to the present invention, a sensor node spreading device is disposed in each of the plurality of injection paths extending from the respective injection holes into the respective launch tubes corresponding thereto to seal the respective injection paths, but The apparatus may further include a plurality of bursting plates ruptured by the propulsion pressure generated by the inflator to open the respective injection paths.

According to an example associated with the present invention, a sensor node spreader is disposed in each of the plurality of spray paths extending from the respective spray holes into the respective launch tubes corresponding thereto and generated by the inflator during operation of the inflator. It may further include a plurality of shock absorbers to be pushed by the pushing pressure to push each of the sensor nodes out of the respective injection pipe.

According to an example related to the present invention, each launch tube may be provided with a sensor node fixing member for temporarily fixing the respective sensor nodes.

According to an example related to the present disclosure, the sensor node spreading apparatus may further include a height sensor that detects a height from the ground to the housing when the housing falls and provides an operation signal to the inflator.

According to an example related to the present invention, the sensor node spreading device may further include a sink node coupled to the housing for wireless communication with the plurality of sensor nodes.

According to an example related to the present invention, the sensor node spreading device may further include a reduction mechanism coupled to the housing to reduce the falling speed of the housing.

The present invention also provides a housing having a pressure chamber and a plurality of injection holes connected to the pressure chamber, a plurality of launch tubes coupled to the housing to be connected to the respective injection holes, and wirelessly transmitting a detection signal. A plurality of sensor nodes coupled to the respective launch tubes with antennas for injecting, an inflator formed to generate a propulsion pressure in the pressure chamber for launching the plurality of sensor nodes from the respective launch tubes, the plurality of sensor nodes; A wireless sensor network building device comprising a sink node coupled to the housing for wireless communication.

According to an example related to the present invention, a deceleration mechanism for decelerating the falling speed of the body of each sensor node may be coupled to the body of each sensor node after being fired from the respective launch tube.

According to an example related to the present invention, a support for supporting the body of each sensor node in a vertical position with respect to the ground may be coupled to the body of each sensor node.

Sensor node spreading apparatus according to at least one embodiment of the present invention configured as described above, by distributing the plurality of sensor nodes in all directions at a certain height from the ground in a batch arranged in a predetermined interval of the ground in the sensor nodes can do.

In addition, the wireless sensor network construction apparatus according to the present invention by placing a plurality of sensor nodes at regular intervals around the sink node that serves as a relay, it is possible to stably detect the information of the region, and to transmit the detection signal stably Can be. Therefore, it is possible to smoothly detect information with a small number of sensor nodes, thereby reducing the construction cost of the wireless sensor network.

In addition, the apparatus for constructing a wireless sensor network according to the present invention sets a monitoring range that can be covered by one sink node and a plurality of sensor nodes arranged at even intervals around the sink node as a unit network, thereby providing wireless coverage for a large area. Easy to build sensor network That is, by dividing the entire monitoring area into a unit network range and airdropping the wireless sensor network construction device for each monitoring area, it is possible to effectively monitor a large monitoring area.

1 is a perspective view showing a wireless sensor network construction apparatus according to an embodiment of the present invention.
2 is a perspective view showing a sensor node of a wireless sensor network construction apparatus according to an embodiment of the present invention.
3 is a partial cross-sectional view showing a wireless sensor network construction apparatus according to an embodiment of the present invention.
Figure 4 shows the combined state of the sensor node spreading device and the sensor node of the wireless sensor network building apparatus according to an embodiment of the present invention.
5 shows a state in which the sensor node is launched from the launch tube of the sensor node spreading device.
Figure 6 shows a process of air spraying the sensor node from the sensor node spreading device.
7 shows a state in which a sensor node spreading device and a plurality of sensor nodes land on the ground to build a wireless sensor network.

Hereinafter, with reference to the accompanying drawings, a sensor node spraying apparatus and a wireless sensor network construction device having the same according to an embodiment of the present invention will be described in detail.

The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It may appear to be exaggerated or simplified. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

1 is a perspective view showing a wireless sensor network construction apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing a sensor node of a wireless sensor network construction apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the apparatus 100 for constructing a wireless sensor network according to an embodiment of the present invention is a sensor node spraying apparatus for spraying a plurality of sensor nodes 110 and a plurality of sensor nodes 110. 120. The sensor node spreading apparatus 120 is dropped in the air through an aircraft or an apparatus in a state in which a plurality of sensor nodes 110 are coupled. The sensor node spreader 120 sprays a plurality of sensor nodes 110 in the air while descending to the ground, lands on the ground, and wirelessly with the plurality of sensor nodes 110 disposed around the sensor node spreader 120. Configure the sensor network.

As shown in FIGS. 1 and 2, the sensor node 110 is airdropped to be coupled to the sensor node spreader 120, and then sprayed at a predetermined height from the ground to surround the sensor node spreader 120. Is placed.

The sensor node 110 collects information on specific physical and chemical phenomena of the landing area and transmits the collected information by using wireless communication to the sink node 150 of another sensor node spreading device 120.

The sensor node 110 includes a sensor unit, a controller, a wireless communication unit, and a power supply unit for detecting physical or chemical changes. The antenna 111 for wireless communication of the sensor node 110 protrudes from the end of the body 112 of the sensor node to favor wireless communication.

A plurality of support protrusions 113 are provided outside the body 112 of the sensor node. The plurality of support protrusions 113 support the body 112 of the sensor node in contact with the inner circumferential surface of the launch tube 140 when the body 112 of the sensor node is coupled to the launch tube 140, and the body 112 of the sensor node. And reduces friction between the launch tube 140. The smaller the friction between the body 112 of the sensor node and the launch tube 140, the better the firing of the sensor node 110.

In addition, the sensor node 110 may include a plurality of supports 114 and sensor nodes for supporting the body 112 of the sensor node so that the antenna 111 may maintain an upright state perpendicular to the ground when it is landed on the ground. It includes a parachute 115 to slow down the falling speed of the body (112).

The plurality of supports 114 are disposed to be perpendicular to the body 112 of the sensor node at one end of the body 112 of the sensor node. The parachute 115 is fixed to the fixing protrusion 116 provided at the other end of the body 112 of the sensor node. The parachute 115 is coupled to the other end of the body 112 of the sensor node on which the antenna 111 is disposed. When the sensor node 110 descends, the antenna 111 is disposed on the upper side and the plurality of supports 114 are lowered. It works advantageously to maintain the standing up direction.

The sensor node 110 is coupled to the launch tube 140 so that the support parts 114 which cannot be accommodated in the launch tube 140 of the sensor node spreader 120 and the portion where the important parts are located are disposed outside. Of course, the specific structure of the sensor node 110 is not limited to that shown, and the coupling structure of the sensor node spreading device 120 and the sensor node 110 may be variously changed according to the structure of the sensor node 110. have. For example, the plurality of supports 114 may be disposed in the middle of the body 112 of the sensor node, and the structure or position of the antenna 111 may also be changed. And the parachute 115 may be changed to another reduction mechanism. As the deceleration mechanism, various devices capable of slowing down the falling speed by operating with power or non-power, such as a propeller or a rotor, may be used.

3 is a partial cross-sectional view showing a wireless sensor network construction apparatus according to an embodiment of the present invention.

As shown in FIGS. 1 and 3, the sensor node spreading apparatus 120 includes a housing 130 having a pressure chamber 131, a plurality of launch tubes 140 disposed around an outer circumference of the housing 130, and a housing ( The sink node 150 coupled to the outside of the 130, an inflator 160 for generating propulsion pressure in the pressure chamber 131, and a height sensor 170 for detecting a height from the ground to the housing 130. ).

The housing 130 is a pressure vessel capable of withstanding the dropping shock and the propulsion pressure generated in the pressure chamber 131, and the upper and lower portions of the intermediate body 132 and the intermediate body 132 to which the plurality of launch tubes 140 are coupled, respectively. The upper cover 133 and the lower cover 134 are combined. The outer upper surface of the upper cover 133 is provided with a fixing plate 135 to which the sink node 150 is coupled. And the outer lower surface of the lower cover 134 is coupled a plurality of shock absorbing members 136 for absorbing the shock generated when landing on the ground. The buffer member 136 may be made of various materials having elasticity.

The shock absorbing member 136 allows the center of gravity of the housing 130 to be positioned below the housing 130 in addition to the shock absorbing function. When the center of gravity of the housing 130 is located at the bottom, it is easy to maintain the standing state in which the sink node 150 is disposed at the top when the housing 130 lands on the ground. A heavy shell may be coupled to the lower cover 134 to cover the plurality of shock absorbing members 136 to position the center of gravity of the housing 130 at the bottom.

A plurality of injection holes 137 connected to the pressure chamber 131 are arranged at a predetermined interval around the intermediate body 132, and a plurality of protrusions protruding from an outer surface of the intermediate body 132 are disposed at an outer circumference of the intermediate body 132. Injection tube 138 is provided. The plurality of injection pipes 138 are connected one-to-one with the plurality of injection holes 137 and are disposed to be inclined at an angle in an upward direction. Each injection tube 138 is coupled to the launch tube 140. The launch tube 140 is disposed to be inclined at an angle from the outer surface of the intermediate body 132 by being disposed in line with the injection tube 138.

As the injection tube 138 and the launch tube 140 are inclined upwardly with respect to the ground, the sensor node 110 that is emitted from the launch tube 140 descends in a parabolic manner in the air.

When the sensor node 110 descends while drawing a parabola in the air, it is easy to ensure sufficient time for the parachute 115 of the sensor node 110 to be unfolded, and the sensor node spreader 120 in which the sensor node 110 descends. It can be lowered to the same airflow condition and may advantageously act to uniformly distribute the sensor node 110 around the sensor node spreader 120.

The launch tube 140 is connected to the pressure chamber 131 inside the housing 130 through the injection hole 137 and the injection tube 138, and the pressure chamber 131 inside the injection tube 138 and the launch tube 140. In order to guide the propellant gas generated from the injection tube 138 toward the outer end of the injection port 137 is extended to the injection tube 140 is provided with an injection path (141).

As shown in FIGS. 3 and 4, a ring-shaped sensor node fixing member 142 for temporarily fixing the sensor node 110 to the launch tube 140 is coupled to the end of the launch tube 140. A plurality of hooks 143 are disposed at one end of the sensor node fixing member 142.

The sensor node 110 coupled to the launch tube 140 through the sensor node fixing member 142 is temporarily fixed to the launch tube 140 by the middle edge thereof being caught by the plurality of hooks 143. When the sensor node 110 is coupled to the launch tube 140 by the sensor node fixing member 142 and the inflator 160 is operated to generate a pushing pressure in the pressure chamber 131, the sensor node 110 is separated from the sensor node fixing member 142. Off and fired from the launch tube 140. The structure of the sensor node fixing member 142 is not limited to that shown, and may be changed to various other structures capable of temporarily fixing the sensor node 110.

Figure 4 shows the combined state of the sensor node spreading device and the sensor node of the wireless sensor network building apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the injection path 141 is propelled by the bursting plate 145 for sealing the injection path 141 and the propellant gas generated in the pressure chamber 131 to move the sensor node 110 to the injection pipe. A shock absorber 146 that pushes out of 138 is disposed. The rupture plate 145 is fixed to the rupture plate fixing part 139 provided on the inner surface of the injection tube 138, and the shock absorber 146 is provided on the inner surface of the launch tube 140 so as not to move toward the rupture plate 145. 144 is supported.

The rupture plate 145 blocks the injection passage 141, but when the pressure in the pressure chamber 131 rises above a predetermined pressure, the rupture plate 145 opens to open the injection passage 141. Here, the constant pressure is a pressure that can bounce a plurality of sensor nodes 110 from each launch tube 140 collectively and quickly.

If the propellant gas generated by the inflator 160 is delivered toward the sensor node 110 before the pressure in the pressure chamber 131 becomes sufficiently high, the propellant gas may leak without firing the sensor node 110 from the launch tube 140. In this case, the firing distance of the sensor node 110 may not be sufficiently secured.

The plurality of sensor nodes 110 must secure the same firing distance, and for this purpose, the same pressure must be transmitted to each sensor node 110 in a batch when the inflator 160 is operated. The role of the rupture plate 145 is disposed in each injection path 141.

As shown in FIG. 4, the shock absorber 146 is disposed between the rupture plate 145 and the sensor node 110 in the injection passage 141. The shock absorber 146 reduces the impact on the sensor node 110 by allowing the propulsion pressure generated in the pressure chamber 131 to be indirectly transmitted to the sensor node 110 without directly hitting the sensor node 110. give.

That is, the shock absorber 146 is propelled by the propulsion pressure generated by the inflator 160 at the time of rupture of the rupture plate 145 to push the sensor node 110 out of the injection pipe 138.

The shock absorber 146 of the body 147 is directed toward the rupture plate 145 and the body 147, one end of which is open so that the end of the sensor node 110 can be coupled and the receiving space 148 is provided therein. It includes a reinforcing plate 149 coupled to the other end.

When the shock absorber 146 and the sensor node 110 are coupled, the parachute 115 and the antenna 111 of the sensor node 110 are accommodated in the accommodation space 148 of the shock absorber 146. The body 147 may be made of a resin such as ABS or other materials that can absorb shocks, and the reinforcement plate 149 may be made of various materials that are stronger in strength than the body 147 such as aluminum and may absorb shocks. Can be done.

The concrete structure of the shock absorber 146 is not limited to the illustrated one, and the shock absorber 146 may be buffered to the sensor node 110 and may be pushed to the outside of the launch tube 140 at the same time. can be changed.

As shown in FIG. 3, the inflator 160 is installed inside the pressure chamber 131, and can launch each sensor node 110 coupled to the plurality of launch tubes 140 in the pressure chamber 131. Raises the pushing pressure. As the inflator 160, various devices capable of rapidly generating a pushing pressure in the pressure chamber 131 may be used. For example, as the inflator 160, as used in an airbag module of a vehicle, an apparatus capable of generating a propellant gas by igniting an electric signal to explode a chemical propellant may be used.

The inflator 160 operates by receiving an operation signal from the height sensor 170. 1 and 3, the height sensor 170 is installed on the outside of the housing 130 to detect the height of the housing 130 from the ground when the housing 130 is lowered, the housing 130 When the height of) increases to a certain height, the inflator 160 is operated by providing an operation signal to the inflator 160.

After the sensor node spreader 120 is airborne, if the inflator 160 operates while the height of the housing 130 is too high, the sink nodes 150 coupled to the sensor nodes 110 to the housing 130 are provided. It becomes difficult to place them evenly around.

On the other hand, if the inflator 160 is operated while the height of the housing 130 is too low, it becomes difficult to secure enough time for the parachute 115 of each sensor node 110 to unfold, and the sensor nodes 110 are separated from the ground. Flying objects can be hindered by various objects.

Due to this problem, the height sensor 170 detects the height of the housing 130 so that the inflator 160 can operate when the height of the housing 130 reaches a certain height (for example, several tens of meters). 160 to provide an operational signal. As the height sensor 170, various devices capable of detecting a height from the ground of the housing 130 such as a laser sensor or an altimeter sensor may be used.

In addition, the sensor node spreading apparatus 120 further includes a parachute 180 (refer to FIG. 6) for reducing the falling speed of the housing 130. The parachute 180 is unfolded when the sensor node spreading device 120 is dropped in the air, thereby reducing the falling speed of the housing 130 and maintaining the standing state of the housing 130 without being inclined to one side. The parachute 180 may be changed to another reduction mechanism. As another reduction mechanism, various devices capable of reducing the falling speed of the housing 130 by operating with a power or non-power such as a propeller or a rotor may be used.

5 to 7, the operation of the wireless sensor network construction apparatus according to an embodiment of the present invention will be described.

5 shows a state in which the sensor node is launched from the launch tube of the sensor node spreading device, FIG. 6 shows a process in which the sensor node is sprayed by the air from the sensor node spreading device, and FIG. The sensor node lands on the ground and shows a state of building a wireless sensor network.

As shown in FIG. 6, the wireless sensor network construction apparatus 100 is dropped in the air through an aircraft or a mechanism, and the housing 130 is standing up with the parachute 180 coupled to the housing 130 unfolded. Lower while keeping The height sensor 170 detects the height of the housing 130 while the housing 130 is decelerated by the parachute 180, and operates on the inflator 160 when the height of the housing 130 reaches a predetermined height. Providing a signal activates inflator 160.

When propulsion pressure is generated in the pressure chamber 131 by the operation of the inflator 160, a plurality of bursting plates 145 disposed around the pressure chamber 131 are ruptured at the same time, and propulsion pressure is transmitted to the plurality of injection tubes 138. do.

As shown in FIG. 5, the pushing pressure is transmitted to the shock absorber 146 through the injection passage 141. At this time, the shock absorber 146 is pushed by the pushing pressure to press the sensor node 110 to the outside of the launch tube 140. When the propulsive pressure of the pressure chamber 131 is transmitted to the shock absorber 146, the bottom surface of the reinforcing plate 149 and the body 147 of the shock absorber 146 may be deformed to effectively absorb the shock. .

The sensor node 110, which has indirectly received the propulsion pressure of the pressure chamber 131 from the shock absorber 146, escapes from the sensor node fixing member 142 and bounces from the launch tube 140 together with the shock absorber 146. .

Thereafter, as shown in FIG. 6, the sensor node 110 descends from the shock absorber 146 to the standing state in which the antenna 111 faces upward while the parachute 115 is unfolded. Although the figure shows that one sensor node 110 has been fired, a plurality of sensor nodes 110 are simultaneously air launched.

As shown in FIG. 7, after all of the sensor nodes 110 are fired, the housing 130 of the sensor node spreader 120 is landed on the ground while maintaining the standing state of the sink node 150 upwards. . When landing on the ground, the shock absorbing member 136 in the lower portion of the housing 130 absorbs the shock to prevent breakage of important components such as the sink node 150.

In addition, the plurality of sensor nodes 110 are disposed around the sensor node spreading device 120 by landing on the ground.

When the sensor node 110 lands on the ground, the support 114 of each sensor node 110 supports the body 112 of the sensor node so that the sensor node 110 is in an upright state with the antenna 111 facing upward. Can be maintained.

As such, the wireless sensor network construction apparatus 100 according to an embodiment of the present invention arranges the plurality of sensor nodes 110 at regular intervals around the sink node 150 serving as a relay, thereby detecting information of a corresponding region. Can be performed stably, and the detection signal can be transmitted stably.

Therefore, a sufficient number of sensor nodes 110 can detect sufficient information, thereby reducing the cost of building a wireless sensor network.

In the present invention, the specific structure of each component described above may be variously changed. For example, the installation position of the sink node 150 need not be limited to the upper end of the housing 130, and the position of the height sensor 170 may also be variously changed.

In addition, the specific structure of the housing 130 may also be variously changed. The housing 130 is not formed of the upper cover 133, the lower cover 134, and the intermediate body 132, but may be integrally formed. In addition, the injection tube 138 and the launch tube 140 may also be formed in one piece, and the launch tube 140 and the sensor node fixing member 142 may also be formed in one piece.

The embodiments of the present invention described above and illustrated in the drawings are not limited to the configuration and method of the embodiments described above, but the embodiments may be all or part of each embodiment so that various modifications may be made. May be optionally combined.

The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

100: wireless sensor network construction device 110: sensor node
111 antenna 114 support
115, 180: parachute 120: sensor node spreading device
130 housing 131 pressure chamber
132: intermediate body 133: top cover
134: lower cover 135: fixed plate
136: buffer member 137: injection hole
138: injection pipe 139: rupture plate fixing portion
140: launch tube 142: sensor node fixing member
143: hook 144: locking jaw
145: rupture plate 146: shock absorber
149: reinforcement plate 150: sink node
160: Inflator 170: height sensor

Claims (11)

A housing including a pressure chamber and a plurality of injection holes connected to the pressure chamber;
A plurality of launch tubes coupled to the housing so as to be connected to the respective injection holes, and coupled to a sensor node disposed on the ground to form a wireless sensor network; And
And an inflator configured to generate a propulsion pressure in the pressure chamber to launch the plurality of sensor nodes coupled to the respective launch tubes from the respective launch tubes. The method of claim 1,
The respective injection ports are respectively disposed in a plurality of injection paths extending into the respective launch tubes corresponding thereto, thereby closing the respective injection paths, and bursting by the propulsion pressure generated by the inflator when the inflator is operated. And a plurality of rupture plates to open the respective injection paths. 3. The method according to claim 1 or 2,
Each of the plurality of injection paths extending from the respective injection holes into the respective launch tubes corresponding thereto, and being propelled by the propulsion pressure generated by the inflator during operation of the inflator to cause the respective sensor node to The sensor node spreading device further comprises a plurality of shock absorbers for pushing out of each injection pipe. The method of claim 1,
And each of the launch tubes includes a sensor node fixing member for temporarily fixing the respective sensor nodes. The method of claim 1,
And a height detecting sensor for detecting a height from the ground to the housing when the housing falls and providing an operation signal to the inflator. The method of claim 1,
And a sink node coupled to the housing for wireless communication with the plurality of sensor nodes. The method of claim 1,
And a deceleration mechanism coupled to the housing to slow down the falling speed of the housing. The method of claim 1,
And the launch tube is disposed on an outer surface of the housing to be inclined upwardly with respect to the ground. A housing having a pressure chamber and a plurality of injection holes connected to the pressure chamber;
A plurality of launch tubes coupled to the housing so as to be connected to the respective injection holes;
A plurality of sensor nodes having an antenna for wirelessly transmitting the sensed signal, the plurality of sensor nodes coupled to the respective launch tubes;
An inflator configured to generate a pushing pressure in the pressure chamber for firing the plurality of sensor nodes from the respective launch tubes; And
And a sink node coupled to the housing to enable wireless communication with the plurality of sensor nodes. 10. The method of claim 9,
And a deceleration mechanism is coupled to the body of each sensor node to decelerate the falling speed of the body of each sensor node after being fired from the respective launch tube. 10. The method of claim 9,
And a support for supporting the body of each sensor node in a vertical position with respect to the ground when the body of each sensor node is grounded.

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