JP5599116B2 - Intrusion detection device - Google Patents

Description

  The present invention relates to an intrusion detection device that is used in a construction site and the like to detect that a vehicle or the like has entered a predetermined work area and notify an operator in the work area.

  Conventionally, in a work site such as road construction, one side lane of a two-lane road is blocked to make one-side alternate traffic, and construction is performed in the blocked work area. On a main road having a plurality of lanes, construction is performed such that one lane of the plurality of lanes is blocked and the vehicle is changed to another lane. Therefore, workers or vehicle guides who perform construction work in these work areas must pay close attention so that careless vehicles or the like do not go straight into the work area.

  In order to reduce such attention labor, an intrusion detection device for notifying an operator of the danger of an intruding vehicle or the like and securing a time for retreating from the spot has been studied. As this intrusion detection device, for example, a mat sensor laid in the area on the front side (entrance side) of the vehicle traveling direction on the road, a shock sensor and a fall sensor provided in the head of the cone that partitions the work area, A low-power radio transmitter provided at the head of the cone, and an antenna and alarm device for receiving radio waves from the transmitter (see, for example, Patent Document 1).

  As the mat sensor described above, although not described in the above-mentioned document, for example, a sensor that detects a load change that the mat receives when the vehicle rides on or a physical displacement in the vertical direction is conceivable. In recent years, a piezoelectric element that generates a voltage by receiving pressure has become widespread, and a piezoelectric element sensor that transmits an electric signal based on the voltage to a detector can also be used. A sensor using such a piezoelectric element is superior in that it has a simple structure and hardly causes a malfunction as compared with a sensor that detects mechanical displacement.

JP 09-273125 A

  The mat sensor described above is preferably laid in a wide area over the entire road width so that it can be detected in the full width in the vehicle intrusion direction. However, if a piezoelectric element is installed over the entire large area, the cost of the piezoelectric element increases, and the entire apparatus becomes expensive.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an intrusion detection device that can be configured at low cost even when a piezoelectric element is used.

To solve the above problems, the present invention detects the vehicle or the like invading a predetermined working area, such as construction sites, a intrusion detection system to inform the operator of the working area, long The upper surface on which the vehicle rides is formed in a substantially flat shape so that the invading vehicle or the like travels on the upper side of the upper surface. Is inserted so that one side of the square-shaped section faces upward, and extends in the longitudinal direction of the air enclosure so that the air enclosure is not crushed more than necessary. The mounting groove is provided on the outside and is laid on the road surface, and has a trapezoidal shape with a shorter upper base than the lower bottom in contact with the road surface. Is formed and assembled in the mounting groove. A mounting base is provided in which the upper base of the trapezoidal shape is lower than one side directed to the upper side of the buffer member, and the trapezoidal shape is formed in the mounting groove of the mounting base in a state where the buffer member is inserted. And a piezoelectric element that is assembled so as to protrude from the upper base of the vehicle, and the piezoelectric element is deformed by a change in air pressure in the air enclosure when the vehicle or the like travels on the detection part. A piezoelectric element that generates voltage, a transmitter that detects the voltage of the piezoelectric element and transmits a signal, a warning unit that receives a signal from the transmitter and notifies an operator of the intrusion of the vehicle, etc. It is provided with.
According to this configuration, it is not necessary to provide the piezoelectric element over the entire large area of the detection unit by operating the piezoelectric element with the air pressure acting from the detection unit.

Further, the piezoelectric element portion may be detachably attached to a side portion of the detection portion.
According to this configuration, a plurality of detection units manufactured according to the road width can be prepared, and the detection units can be appropriately selected and used.

Further, the alarm unit can be configured by alarm means for giving an audible or visual attention to the worker.
According to this configuration, it is possible to reliably call attention to the worker in the work area.

The intrusion detection device according to the present invention has a long air-sealed portion, the upper surface on which the vehicle rides is formed in a substantially flat shape, and the invading vehicle or the like travels above the upper surface. The air sealing portion is inserted into the air sealing portion so that one side of the air sealing portion formed in a square shape faces upward, and extends in the longitudinal direction of the air sealing portion. Is provided on the road surface, and the upper base is formed in a trapezoidal shape with a shorter upper base than the lower base in contact with the road surface. The mounting base is formed with a mounting groove extending in the longitudinal direction, and the upper base of the trapezoidal shape is lower than one side directed to the upper side of the buffer member when assembled in the mounting groove. And the cushioning member is inserted in the front And mount the detector assembled to protrude from the upper base of the trapezoidal shape in the mounting groove, in the air inclusion portion when having a piezoelectric element, on the detecting unit the vehicle or the like has traveled A piezoelectric element that deforms the piezoelectric element by a change in air pressure, generates a voltage, a transmitter that detects the voltage of the piezoelectric element, and transmits a signal; receives a signal from the transmitter; Is provided with an alarm section for informing the vehicle or the like, so that it is not necessary to provide a piezoelectric element over the entire large area of the detection section by operating the piezoelectric element with air pressure acting from the detection section. An intrusion detection device can be configured with the elements. Therefore, the cost for the piezoelectric element can be suppressed, and the intrusion detection device can be configured at a low cost as a whole.

It is a perspective view showing the external appearance of the road construction site using the intrusion detection apparatus which concerns on embodiment of this invention. (A) is a top view which shows the whole intrusion detection part, (b) is AA sectional drawing of Fig.2 (a). (A) is a bottom view of FIG. 3 (a), (b) is BB sectional drawing of FIG. 2 (a). It is a perspective view which shows the whole outline | summary of an alarm part. It is other embodiment of an alarm part, Comprising: It is a perspective view of an alarm receiving helmet. It is an enlarged view which shows the detail of the receiving part of FIG. It is a modification of an intrusion detection part, (a) is a top view, (b) is CC sectional drawing of Fig.7 (a), (c) is DD sectional drawing of Fig.7 (a). . It is a figure which shows the state which attached the intrusion detection part of FIG. 7 to the mount, (a) is a top view, (b) is EE sectional drawing of Fig.8 (a), (c) is FIG. It is FF sectional drawing of a). It is sectional drawing which shows the state in which the intrusion detection part shown in FIG. 8 was stepped on by the vehicle (tire).

  Hereinafter, intrusion detection device 20 according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an outline of a road construction site using an intrusion detection device 20 according to an embodiment of the present invention. FIG. 1 shows a road construction site where one side lane 1a (construction lane) of a two-lane road 1 is closed.

  In the road construction site shown in FIG. 1, for example, a warning display device such as a cone 2 is arranged on the road at a predetermined interval, and an intrusion prohibited area 10 that prohibits entry by persons other than construction personnel is defined. Road construction is performed in the intrusion prohibited area 10, and the worker 3 performs work in the intrusion prohibited area 10. Further, in the other lane 1b that is not closed, one-sided alternate passage is performed in order to pass the vehicle 4 traveling in the lane 1a by changing the lane.

  As the above-described caution display device, for example, an arrow for guiding the vehicle 4 to the lane 1b, a signboard with a caution display, a doll modeled on a vehicle guide, or the like is used. Sometimes.

  In the intrusion prohibited area 10, an intrusion detection device 20 is installed for detecting an intrusion when the vehicle 4 traveling in the one-side lane 1a travels straight by mistake. More specifically, the intrusion detection device 20 constructs the intrusion detection unit 100 disposed in the intrusion prohibited area 10 on the near side when viewed from the vehicle 4 and that the intrusion detection unit 100 has detected the intrusion vehicle. And an alarm unit 300 for informing a person.

  The intrusion detection unit 100 described above is arranged inside the intrusion prohibited area 10 in FIG. 1, but is located in front of the intrusion prohibited area 10 and is a vehicle 4 that travels with a lane change (a vehicle that travels correctly). 4) may be arranged in an area that is not normally taken up.

  FIG. 2A is a plan view of the intrusion detection unit 100 as viewed from above, and FIG. 2B is a cross-sectional view taken along line AA in FIG. Moreover, Fig.3 (a) is a side view of the intrusion detection part 100 shown to Fig.2 (a), FIG.3 (b) is BB sectional drawing of Fig.2 (a).

  The intrusion detection unit 100 is like a switch that generates electric power from a piezoelectric element using air pressure. As shown in FIG. 2A, the intrusion detection unit 100 includes a detection unit 101, a piezoelectric element unit 102 disposed at a side end of the detection unit 101 (a right end portion in FIG. 2A), It consists of

  As shown in FIG. 2A, the detection unit 101 has a substantially rectangular shape in plan view, and is formed of a material having flexibility and elasticity such as resin. The length of the detection unit 101 in the width direction (left and right direction in FIG. 2A) is drawn short in the drawing in FIGS. 2 and 3, but extends over almost the entire road width of the one-side lane 1a. It is laid in a manner that crosses the lane 1a (see FIG. 1).

  In addition, the upper surface 101a of the detection unit 101 is formed in a substantially planar shape, and has a larger area than the piezoelectric element unit 102 described later in detail. When the vehicle 4 rides on the upper surface 101a, the detection unit 101 is deformed and the intrusion detection unit 100 detects the vehicle 4.

  Inside the detection unit 101, as shown in FIG. 2B or FIG. 3B, a hollow air-encapsulating unit 101b is formed over the entire length of the detection unit 101 in the width direction. Further, an attachment opening 103 for attaching the piezoelectric element portion 102 is formed at the right end portion of the detection portion 101. The air sealing part 101 b of the detection part 101 is formed in an airtight manner except for the attachment opening 103, so that the air enclosed in the air sealing part 101 b does not leak from other than the attachment opening 103.

  On the other hand, as shown in FIG. 2A, the piezoelectric element portion 102 includes an outer portion 104, a plate-like substrate 105 attached to the outer portion 104, and a piezoelectric element 106 disposed on the plate-like substrate 105. It consists of

  As shown in FIG. 2A, the outer shell 104 is formed in a substantially circular shape in plan view and is formed of a resin material. It can be formed of a metal material or the like.

  In addition, a hollow portion 104 b having a hollow shape is formed inside the outer portion 104. A mounting portion 107 is formed at the left end portion of the outer shell portion 104. The hollow portion 104 b of the outer shell portion 104 is formed airtight except for the attachment portion 107, so that air in the hollow portion 104 b does not leak from other than the attachment portion 107.

  The attachment portion 107 is detachably attached by fitting with the attachment opening portion 103 of the detection portion 101 described above. The fitting portion is configured to be airtight so that air does not leak outside from the fitting portion in a state where the attachment opening 103 is attached to the attachment portion 107. Thereby, the air sealing part 101b of the detection part 101 and the hollow part 104b of the outer shell part 104 communicate with each other in an attached state and have airtightness.

  Note that the attachment of the attachment opening 103 and the attachment portion 107 is not limited to the structure of attachment by fitting as long as airtightness can be secured. For example, although it is not detachable, it may be attached by adhesion. Moreover, you may make it shape | mold the detection part 101 and the outline part 104 integrally. However, if the structure is detachably attached, for example, a plurality of types of detection units 101 are prepared in advance in accordance with the length in the width direction of the one-side lane 1a, and the piezoelectric element unit 102 is appropriately added to the optimal detection unit 101. Therefore, it is preferable to be detachable because convenience is improved.

  Further, the fitting is performed such that the tolerance between the mounting opening 103 and the mounting portion 107 is a tight fit. In addition, a locking claw (not shown) is provided in either the mounting opening 103 or the mounting portion 107, and a locking hole (not shown) that engages with the locking claw is provided in the other. You may make it stop.

  As shown in FIGS. 2A and 3B, a substantially circular opening 108 is formed on the upper surface 104 a of the outer shell 104. The circular plate-like substrate 105 described above is attached to the opening 108 so as to ensure the airtightness of the hollow portion 104b. Further, the piezoelectric element 106 is attached to the upper surface of the plate-like substrate 105 so as to be exposed to the outside. The plate-like substrate 105 and the piezoelectric element 106 are integrally attached so as to have the same deformation amount in the same direction when an air pressure described later is applied.

Note that the outer portion 104, the plate-like substrate 105, and the piezoelectric element 106 described above may have a shape other than a substantially circular shape. For example, it may be rectangular or elliptical. That is, when manufacturing the piezoelectric element portion 102, the shape that can be manufactured most easily can be obtained.
Further, the outer shell 104 may be provided with an adjustment hole or a check valve for adjusting the atmospheric pressure in the hollow portion 104b.

  The piezoelectric element 106 is, for example, a bimorph type having a structure in which two piezoelectric elements are bonded together, and an electrical signal is generated between both surfaces of the piezoelectric element 106.

  In such an intrusion detection unit 100, when the vehicle 4 or the like rides on the upper surface 101a of the detection unit 101 and the detection unit 101 is pressed, the air sealing unit 101b in the detection unit 101 is crushed and the air sealing unit 101b. The pressure of the air enclosed inside rises. As the air pressure rises, the pressure in the hollow portion 104b of the piezoelectric element portion 102 also rises in conjunction. Due to this pressure increase, the plate-like substrate 105 and the piezoelectric element 106 are pressed upward and deformed and vibrated. This vibration is converted into a voltage by the piezoelectric effect.

  Moreover, since the air enclosure part 101b in the detection part 101 is formed over the full length of the width direction, even if the vehicle 4 rides on any part of the width direction of the detection part 101, it is in the air enclosure part 101b. The air pressure increases and the vehicle 4 can be reliably detected.

  The deformation amount of the plate-like substrate 105 and the piezoelectric element 106 is proportional to the air pressure. Therefore, the amount of deformation can be adjusted by adjusting the amount of air to be sealed. Further, the deformation amount and the vibration amount can be adjusted by changing the plate thickness of the plate-like substrate 105 and the piezoelectric element 106.

  The plate-like substrate 105 is provided with a transmission unit 120 that detects a voltage obtained by deformation of the piezoelectric element 106 and transmits a signal to the alarm unit 300. More specifically, the transmission unit 120 transmits a signal when the piezoelectric element 106 exceeds a predetermined vibration and a voltage exceeding a predetermined level is generated. As this signal, for example, an FM signal obtained by a filter circuit (not shown) provided on the plate-like substrate 105 is used.

  Note that a rechargeable lithium ion battery for supplying power to a circuit in the transmission unit 120 can be mounted on the plate-like substrate 105. It is also possible to provide a circuit for amplifying a signal, a timer circuit for ignoring a signal of a predetermined number of seconds or less (preventing malfunction), and the like.

  In addition to being provided on the plate-like substrate 105, the transmission unit 120 may be provided, for example, in a transmission box (not shown) disposed in the vicinity of the piezoelectric element unit 102. The transmission box is connected to the plate-like substrate 105 by wiring, and the voltage generated in the piezoelectric element 106 may be sent to the transmission box by this wiring.

  A rechargeable lithium ion battery for supplying power to a circuit in the transmission unit 120 can also be mounted inside the transmission box. Furthermore, a circuit for amplifying a signal, a timer circuit for ignoring a signal of a predetermined number of seconds or less (preventing malfunction), and the like can be provided inside the transmission box.

  Further, the signal may be other than the FM signal. The installation distance between the transmission unit 120 and the reception unit 312 described later is, for example, about 500 meters. If the signal can transmit this distance, it can be transmitted using a signal using another frequency band.

FIG. 4 is a perspective view showing an outline of the alarm unit 300.
In the alarm unit 300, a support column 311 is erected on a scaffold 310, and a receiving unit 312 is provided on the support column 311. The reception unit 312 can wirelessly receive the signal transmitted from the transmission unit 120 described above by the antenna 313.

  Similarly to the transmission unit 120 described above, the reception unit 312 may be equipped with a lithium ion battery, a timer circuit that activates an alarm unit for a predetermined time, or the like. Furthermore, a voice synthesizer for notifying an alarm by voice may be installed.

  In addition, a patrol light 314 that can visually alert the operator 3 and an alarm device 315 that can visually alert the operator 3 are attached to the column 311. The patrol light 314 and the alarm device 315 are electrically connected to the receiving unit 322 so that signals received by the receiving unit 322 can be sent to each.

  As the alarm means, when only one of the patrol light 314 or the alarm device 315 is sufficient at the construction site, only one of them may be provided. For example, the alarm unit 315 may be provided with only the alarm device 315 at a construction site where there are undulations and the overall prospect is poor.

  FIG. 5 shows an alarm unit different from the configuration of FIG. 4, in which a receiving unit 322 is embedded in a helmet 320. FIG. 6 is an enlarged cross-sectional view of the receiving unit 322.

  As shown in FIG. 5, the helmet 320 worn by the worker 3 on the head is provided with an ear cover 321 that covers the ear portion of the worker 3. The ear cover 321 includes a receiving unit 322. Is provided. As shown in FIG. 6, the receiving unit 322 stores an FM receiving circuit 323, an IPB speaker 324, an amorphous solar panel 325, and a secondary battery 326.

  Note that the receiving unit 322 may be provided at a portion other than the ear cover 321 of the alarm receiving helmet 320, for example, at the top or rear of the helmet. That is, it can be determined as appropriate according to the position of the center of gravity of the alarm receiving helmet 320 and the wearability of the operator.

  The FM receiving circuit 323 is for wirelessly receiving the FM signal transmitted from the transmission unit 120 described above. Further, as shown in FIG. 6, the IPB speaker 324 is for vibrating the entire helmet and prompting the operator 3 to be alerted by vibration from the helmet that is a resonance body. As a result, the operator 3 can be alerted without having to put an earphone in his / her ear, for example, so that his / her ear is not blocked. Therefore, the sound from the outside cannot be heard, and for example, it is possible to hear the attention of other workers and to detect other dangers with the ear.

  The amorphous solar panel 325 is a so-called solar cell and supplies power to the FM receiving circuit 323 and the IPB speaker 324. The secondary battery 326 is used to supply power in place of the amorphous solar panel 325 when sunlight cannot be taken (for example, during night work).

  It should be noted that a configuration other than the IPB speaker 324, for example, a bone conduction speaker in a mode of being brought into contact with an operator's temporal region can also be used. According to these, since sound and voice can be transmitted to the worker through bone conduction, the worker's ear is not covered with a voice speaker, etc., and other sounds during work can be heard and safety is ensured. Is further enhanced.

  According to the intrusion detection device according to the embodiment of the present invention, the intruding vehicle 4 and the like have the detection unit 101 that travels on the upper side, the piezoelectric element 106, and the detection unit 101 is provided on the detection unit 101. The piezoelectric element portion 102 that generates a voltage by deforming the piezoelectric element 106 by a change in air pressure in the air sealing portion 101b when the vehicle 4 or the like travels, and a transmission that detects the voltage of the piezoelectric element 106 and transmits a signal Unit 120 and an alarm unit 300 that receives a signal from the transmission unit 120 and informs the operator 3 of the entry of the vehicle 4 or the like, so that the piezoelectric element 106 is operated by the air pressure acting from the detection unit 101. Therefore, it is not necessary to provide a piezoelectric element over the entire large area of the detection unit 101, and the intrusion detection device 20 can be configured with a small piezoelectric element 106. Therefore, the cost for the piezoelectric element 106 can be suppressed, and the intrusion detection device 20 can be configured at a low cost as a whole.

  In addition, since the piezoelectric element unit 102 is detachably attached to the side portion of the detection unit 101, for example, a plurality of types of detection units 101 are prepared in advance according to the length in the width direction of the one-side lane 1a. The piezoelectric element unit 102 can be replaced with the optimal detection unit 101 as appropriate. As a result, the convenience of the apparatus is improved.

  Furthermore, the alarm unit 300 is configured by the patrol light 314 and / or the alarm device 315 that gives the worker an auditory or visual attention, so that the operator 3 can be surely alerted.

  Furthermore, since the alarm unit 300 is attached to the alarm receiving helmet 320 of the worker 3, even when working in a loud sound, the worker 3 can be surely alerted.

  The intrusion detection device according to the embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. is there.

  For example, in the present embodiment, the detection unit 101 has a flat shape, but may be configured with other structures. Hereinafter, the intrusion detection unit 200 configured with another structure will be described.

  FIG. 7A is a plan view of the intrusion detection unit 200 as viewed from above. 7B is a cross-sectional view taken along the line CC in FIG. 7A, and FIG. 7C is a cross-sectional view taken along the line DD in FIG. Further, FIG. 8A is a plan view of a state where the intrusion detection unit 200 is placed on one side lane 1a, FIG. 8B is a side view of FIG. 8A, and FIG. It is EE sectional drawing of 8 (a).

  As shown in FIG. 7A, the intrusion detection unit 200 includes a detection unit 201, a piezoelectric element unit 202 disposed at a side end of the detection unit 201 (a right end portion in FIG. 7A), and It consists of The feature of the intrusion detection unit 200 is that the detection unit 201 can be easily manufactured and made inexpensive by making the detection unit 201 cylindrical.

  As shown in FIGS. 7A to 7C, the detection unit 201 includes a detection unit main body 210 formed in a cylindrical shape (tube shape, rubber tube), and an opening on the left side of the detection unit main body 210. And a buffer member 212 provided inside the cylindrical portion of the detection unit main body 210.

  The detection unit main body 210 is formed of a material having flexibility and elasticity such as resin or rubber. The length of the detection unit main body 210 in the longitudinal direction (left and right direction in FIG. 7A) is formed to be a length (see FIG. 1) laid over the entire road width of the one-side lane 1a.

  The plug member 211 is connected to the detection unit main body 210 by fitting, and is configured to be airtight so that air in the air sealing unit 201b does not leak from the fitting unit.

  The buffer member 212 is a hollow member having a square cross section, is inserted into the detection unit main body 210, and extends along the longitudinal direction of the detection unit main body 210. This buffer member 212 is for preventing the tube-shaped detection part main body 210 from being crushed more than necessary by the tire 230 of the vehicle 4 that rides upward. That is, the air pressure in the air enclosure 201b is prevented from becoming higher than necessary (see FIG. 9).

  As shown in FIGS. 7B and 8B, the piezoelectric element portion 202 is formed in a cylindrical shape, and includes an outer portion 204 having a hollow portion 204b therein, and a mounting opening 203 of the outer portion 204. A plate-like substrate 205 attached so as to be closed, and a piezoelectric element 206 and a transmission unit 120 provided on the plate-like substrate 205 are provided.

  Unlike the piezoelectric element unit 102 in the present embodiment, the piezoelectric element unit 202 is arranged so that the plate-like substrate 205 is substantially orthogonal to the longitudinal direction of the detection unit main body 210. Further, the plate-like substrate 205 is attached so as to airtightly close the opening 208 at the right end of the cylindrical outer portion 204. With these structures, as shown in FIGS. 7A, 7B, 8A, and 8B, the piezoelectric element unit 202 has a size substantially equal to the diameter of the detection unit main body 210. It can be downsized to fit in.

  Further, a mounting opening 203 is formed at the right end of the detection unit main body 210 of the detection unit 201, and the mounting opening 203 is airtightly fitted and attached to the left end of the outer portion 204 of the piezoelectric element unit 202. A mounting portion 207 is formed. By fitting them detachably, the air sealing part 201b and the hollow part 204b communicate with each other in an airtight state.

  On the other hand, as shown in FIGS. 8 and 9, the detection unit 201 is attached to a mounting base 220 for installing the detection unit 201 on the road surface. As shown in FIG. 8 (c), the mounting base 220 has a substantially trapezoidal cross-sectional shape, and a mounting groove 221 into which the detection unit main body 210 of the detection unit 201 is assembled is formed on the upper side. . When assembled in the mounting groove 221, the upper portion of the detection unit main body 210 protrudes from the upper surface of the mounting base 220.

  Thus, according to the structure shown in FIGS. 7-9, the intrusion detection part 200 can be formed more compactly. In addition, by using a large number of cylindrical members, it is possible to provide the intrusion detection unit 200 that is excellent in manufacturability and further reduced in cost.

1 2 lane road 1a One side lane (construction lane)
1b The other lane 2 Cone 3 Worker 4 Vehicle 10 No entry area (work area)
DESCRIPTION OF SYMBOLS 11 Triangle area | region 20 Intrusion detection apparatus 100, 200 Intrusion detection part 101, 201 Detection part 101a Upper surface 101b, 201b Air enclosure part 102,202 Piezoelectric element part 103,203 Mounting opening part 104,204 Outer part 104a Outer part 104a Upper surface 104b, 204b Hollow portion 105, 205 Plate substrate 106, 206 Piezoelectric element 107, 207 Mounting portion 108, 208 Opening portion 120 Transmission portion 210 Detection portion main body 211 Plug member 212 Buffer member 220 Mounting base 221 Mounting groove 230 Tire 300 Alarm Section 310 Scaffolding 311 Post 312 Receiver 313 Antenna 314 Patrite (alarm means)
315 Alarm (alarm means)
320 alarm receiving helmet 320a helmet inner surface 320b helmet outer surface 321 ear cover 322 receiving unit 323 FM receiving circuit 324 IPB speaker 325 amorphous solar panel 326 secondary battery 326 resonance vibration

Claims (3)

An intrusion detection device that detects a vehicle or the like entering a predetermined work area such as a construction site and informs an operator in the work area,
The upper surface on which the vehicle rides is formed in a substantially flat shape so that the invading vehicle or the like travels on the upper side of the upper surface . Inside, it is inserted so that one side of the square-shaped section faces upward, and extends along the longitudinal direction of the air enclosure so that the air enclosure is not crushed more than necessary. A buffer member is provided on the road surface , and the outer bottom surface extends in the longitudinal direction to the upper base having a trapezoidal shape with a shorter upper base than the lower base in contact with the road surface. A mounting groove is formed, and a mounting base is provided in which the upper base of the trapezoidal shape is lower than one side directed to the upper side of the buffer member in a state assembled in the mounting groove, and the buffer member is inserted In the mounting groove in the mounting base A detection unit which is assembled to protrude from the upper base shape,
A piezoelectric element unit that has a piezoelectric element and generates a voltage by deforming the piezoelectric element by a change in air pressure in the air sealing unit when the vehicle or the like travels on the detection unit;
A transmitter for detecting a voltage of the piezoelectric element and transmitting a signal;
An intrusion detection apparatus comprising: an alarm unit that receives a signal from the transmission unit and notifies an operator of the intrusion of the vehicle or the like. The intrusion detection device according to claim 1 , wherein the piezoelectric element portion is detachably attached to a side portion of the detection portion. It said alarm unit, intrusion detection apparatus according to claim 1 or claim 2, characterized in that a warning means for giving attention aurally or visually to the operator.

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