JP2018204210A - On-road installed type road sign notifying state change in accordance with danger extent - Google Patents

Abstract

To provide an on-road installed type road sign that can differentiate state change of low danger from that of high danger to be detected and notified without lowering efficiency of installing operation.SOLUTION: In the inner space of a sign body 10, a triaxial impact sensor, sensor computing means connected to the triaxial impact sensor, and transmitting means connected to the sensor computing means are provided in such a manner that they can be freely attached and detached. The sensor computing means acquires impact acceleration data from the triaxial impact sensor, and performs comparison computation on the impact acceleration data with respect to a first threshold value indicating state change of low danger extent and a second threshold value indicating state change of high danger extent which is higher than the first threshold value. The transmitting means, based on the results of the comparison computation, transmits a first notification signal when the impact acceleration data does not exceed the second threshold value but exceeds the first threshold value, and transmits a second notification signal when the impact acceleration data exceeds the second threshold value.SELECTED DRAWING: Figure 1

Description

  The present invention is installed to separate a traffic regulation area provided on a road where the work is performed from a normal lane when performing road maintenance work, road repair work, etc., and notifies a change in state according to the degree of risk. It relates to road-mounted road signs.

  When performing road maintenance work or road repair work, traffic is restricted in part of the road where the work is performed, but the area where the traffic is restricted is a conical shape called a number of "cones" arranged side by side. It is often separated from a normal driving lane by a road-mounted road sign.

  However, many road-installed road signs for separating the traffic restriction area from the normal travel lane are light in consideration of the convenience of installation work and collection work. Therefore, when a traveling vehicle accidentally enters the restricted area, the road-mounted road sign is bounced off by the impact and does not prevent the traveling vehicle from entering, and the worker enters the vehicle that has entered the restricted passage area. Could be bounced.

  In view of this, there has been proposed a technique for preventing a personal injury caused by a rushed vehicle in a traffic regulation area separated from a normal driving lane by a road-mounted road sign. For example, Japanese Patent Laid-Open No. 6-266996 informs workers on the road that the following vehicle has runaway by kicking a road-mounted road sign while performing an accident handling operation on the road. A runaway vehicle alarm device capable of performing the above is disclosed.

  On the other hand, the road-mounted road sign has another problem due to its light weight. That is, the light road-installed road sign may move or fall over from the installation position due to strong wind or vibration.

  And, when the road-installed road sign is arranged at a position different from the predetermined position or falls, it is not possible to clearly show the traffic regulation area to the driver of the traveling vehicle, There was a risk of running problems. Therefore, regular patrol work is performed to confirm that the road-mounted road signs are in a normal installation state.

  However, it takes time and effort for the patrol work. Furthermore, if there is a movement or a fall immediately after the confirmation work, there is a problem that the state is left until the next patrol work. . In view of this, there has been proposed a method for remotely notifying when a road-mounted road sign is out of a normal state. For example, in Japanese Patent Laid-Open No. 10-18242, a sensor sensitive to at least one of vibration and inclination is provided at the top of a cone cone (on-road road sign), and an abnormal state due to vibration or inclination exceeding a reference occurs. In response to the output of a state discriminating circuit for discriminating the fact, a method for notifying the occurrence of an abnormality by a radio signal is disclosed.

JP-A-6-266996 Japanese Patent Laid-Open No. 10-18242

  As described above, the information indicating the change in the state of the road-mounted road sign is based on the purpose of maintaining the normal installation state for dividing the traffic restriction area and the work in the area that the traveling vehicle has entered the traffic restriction area. It is used for any purpose of informing a person.

  However, in the conventional method of detecting the state change of the road-mounted road sign, both the information necessary for maintaining the installed state and the information necessary for notifying the entry of the traveling vehicle are detected, Based on the detected information, it was difficult to perform only necessary notification without performing unnecessary notification.

  For example, when the entry speed of the vehicle is low, there is no danger to the operator if the vehicle can be stopped immediately after the road-mounted road sign is jumped off. However, the installation state of the road-mounted road sign is greatly changed, and the worker is notified by detecting the change. If the notification is made in such a case, the operator becomes accustomed to the notification, and there is a possibility that the evacuation action may not be taken even in a really dangerous state where quick evacuation is required.

  In addition, in the conventional method for detecting the state change of the road-mounted road sign, when a sensor for detecting the state change is arranged inside the road-mounted road sign, a plurality of road-mounted road signs are stacked and transported. The quantity that can be transported at one time is limited by the operator, and it is difficult to perform the installation work efficiently.

  On the other hand, in consideration of the efficiency of installation work for road-mounted road signs, a method of mounting a sensor that detects state change in the mounting hole provided at the top of the road-mounted road sign has also been proposed. When the road-mounted road sign falls, there is a possibility that the sensor may be damaged, and there is a problem in operation reliability.

  Therefore, the present invention can be installed without reducing the efficiency of the installation work, can detect and notify a change in state separately when the risk is low and high, and is installed on the road with high operational reliability. The purpose is to provide type road signs.

  The road-mounted road sign according to the present invention includes a triaxial impact sensor, a sensor calculation means connected to the triaxial impact sensor, and a transmission means connected to the sensor calculation means in an internal space of the sign main body. It is detachably arranged.

  The sensor calculation means acquires impact acceleration data from the triaxial impact sensor, the impact acceleration data, a first threshold value indicating a state change with a low risk level, and a state with a higher risk level than the first threshold value. A comparison operation with the second threshold value indicating the change is performed.

  The transmission means transmits a first notification signal based on a result of the comparison calculation when the impact acceleration data does not exceed the second threshold but exceeds the first threshold, and the impact acceleration data is A second notification signal is transmitted when the threshold is exceeded.

  The first notification signal may be transmitted when the impact acceleration data exceeds a third threshold after a predetermined time has elapsed from the timing when the impact acceleration data exceeds the first threshold.

  Communication is established between the receiving device that receives the confirmation signal transmitted from the management-side device that receives the first notification signal and / or the second notification signal, and the management-side device based on the confirmation signal. Communication establishment determination means for determining that the communication is established, and display means for displaying the determination in the communication establishment determination means.

  The management side device is a device for receiving a notification signal transmitted from a road-mounted road sign when a shock is detected on the road-mounted road sign, and reporting to a road worker or a road monitor. Means. The management-side device may function alone, or a plurality of devices may cooperate.

  The sign body includes a conical body portion and a detachable bottom portion at the bottom of the body portion, and the triaxial impact sensor, the sensor calculation means, and the transmission means are disposed on the bottom portion. It may be a thing.

  A gyro sensor is further disposed in the internal space, and the first notification signal is obtained based on a measurement value of the gyro sensor after a predetermined time has elapsed from a timing when the impact acceleration data exceeds the first threshold. It may be transmitted when the rotation angle exceeds the fourth threshold.

  According to the road-mounted road sign according to the present invention, the impact acceleration data acquired from the triaxial impact sensor, the first threshold value indicating a low-risk state change, and the risk level greater than the first threshold value is high. The first notification signal and the second notification signal are transmitted according to the result of the comparison calculation with the second threshold indicating the state change. Therefore, by making the first notification signal correspond to a low-risk state change and the second notification signal corresponding to a high-risk state change, the state change is detected and notified separately when the risk is low and high. be able to.

  Further, since the triaxial impact sensor, the sensor calculation means, and the transmission means arranged in the internal space of the sign body are detachable from the sign body, the triaxial impact sensor, the sensor calculation means, In addition, a plurality of sign bodies can be stacked and transported with the transmission means removed. Therefore, the efficiency of installation work is not reduced.

  Furthermore, if the first notification signal is transmitted when the impact acceleration data exceeds the third threshold after a predetermined time has elapsed from the timing when the impact acceleration data exceeds the first threshold, After the force is applied, it is possible to prevent erroneous detection of falling when the original state is restored without falling down, and the detection accuracy can be further improved.

  Furthermore, a communication establishment determination unit that determines that communication with the management side device is established based on a confirmation signal transmitted from the management side device, and a display unit that displays the determination in the communication establishment determination unit. If so, the installation state can be adjusted and communication with the management side apparatus can be established. Therefore, it is possible to reliably notify the detected state change, and the detection accuracy can be further improved.

  Furthermore, when a known conical sign called “cone” is adopted, the sign main body is provided with a conical main body part and a detachable bottom part on the bottom of the main body part. By arranging the axial impact sensor, the sensor calculation means, and the transmission means, the triaxial impact sensor, the sensor calculation means, and the transmission means can be easily removed from the sign body. And since it becomes possible to carry a plurality of each of a sign main part and a bottom in the state which separated a sign main part and a bottom, it can prevent a reduction in efficiency of installation work.

  In addition, by arranging a triaxial impact sensor on the bottom attached to the bottom of the main body, the triaxial impact sensor is installed in the vicinity of the bottom of the main body. The impact is alleviated and the impact acceleration data corresponds to the impact force from the outside. For this reason, it is possible to prevent a low-risk fall, such as a fall caused by a strong wind or vibration, or a fall of a low-speed vehicle collision, from being mistakenly detected as a high-risk state change. The detection accuracy of a high state change can be further increased.

  When the sign body has a different shape from the front and side, for example, in the case of a display board made of a plate that can be bent at the center, it moves greatly from the place where it is installed without falling. The direction may be changed without being able to be visually recognized. Such a sign body is further provided with a gyro sensor in the internal space. The first notification signal is transmitted when the rotation angle obtained based on the measured value of the gyro sensor exceeds the fourth threshold after a predetermined time has elapsed from the timing when the impact acceleration data exceeds the first threshold. If it is assumed, the state whose direction has been changed can be left as a state change with low risk.

It is a longitudinal section of an embodiment of a road installation type road sign concerning the present invention. It is a front view of the bottom part of the state removed from the label | marker main-body part. It is a longitudinal cross-sectional view of the label | marker main-body part of a state from which the bottom part was removed. It is a photograph which shows other embodiment of the road installation type road sign which concerns on this invention.

An embodiment of a road-mounted road sign according to the present invention will be described with reference to FIGS.
The road-mounted road sign 1 according to the present embodiment includes a three-axis impact sensor, an arithmetic processing unit, and a communication device for detecting and notifying a change in state on a hollow sign body 10 that forms a conical sign. Equipped with a shock detector 2.

  The sign main body 10 includes a conical main body 11 and a bottom 12 that is detachably attached to the bottom of the main body 11. The main body 11 is a known sign called “cone”, has an internal space, and has a mounting hole 13 for fitting a lighting device or the like at the top. Moreover, it has the opening 14 in the bottom face, and the collar 15 of planar view square is provided around the opening. The bottom portion 12 is attached to the bottom of the main body portion 11 via the flange 15.

  The bottom 12 is made of hard rubber, and a recess 16 that fits the flange 15 of the main body 11 is provided on the top surface. Further, a protrusion 17 is provided on the upper outer edge of the recess 16. Then, by engaging the protrusion 17 and the flange 15, the bottom 12 can be attached to the bottom of the main body 11.

  On the other hand, by releasing the engagement between the protrusion 17 and the flange 15, the bottom 12 can be removed from the bottom of the main body 11 as necessary. And as shown in FIG. 3, when the opening 14 of the bottom of the main-body part 11 is open | released and the inside is made into a hollow state, it becomes possible to convey the main-body part 11 in multiple numbers.

  As shown in FIG. 2, the bottom portion 12 removed from the main body portion 11 can also be transported in a plurality of layers by bringing the communication antenna 21 of the impact detector 2 into a tilted state.

  The protrusion 17 is bent by a force acting in the vertical direction in a state where the bottom 12 is installed on the ground. Then, the bottom 12 can be attached to the bottom of the main body 11 by the work of covering the main body 11 from directly above the bottom 12 installed on the ground. The main body 11 with the bottom 12 attached can be removed by pulling in the vertical direction (directly upward).

  However, even if a force acts on the main body 11 in a state where the bottom 12 is attached in a direction inclined from the vertical direction, the engagement between the protrusion 17 and the flange 15 is not released. Accordingly, when a force that changes the installation state of the road-mounted road sign 1 such as strong wind, vibration, or vehicle collision is applied, the road-mounted road sign 1 is received without the bottom 12 being detached from the main body 11. The impact detector 2 can detect the impact.

  On the upper surface of the bottom portion 12, a pedestal 18 for arranging the impact detector 2 is provided in a portion arranged in the internal space of the main body portion 11. The pedestal 18 is formed of a hard sponge and is provided with a mounting hole 19 that fits the impact detector 2. The impact detector 2 is fitted into the mounting hole 19.

  On the upper surface of the bottom portion 12, a mounting hole 20 that fits the operation device 22 of the impact detector 2 is provided in a portion that is not arranged in the internal space of the main body portion 11 (a portion that is arranged outside the conical portion). An operating device 22 is fitted in the mounting hole 20 and is connected to the impact detector 2 via a wiring 23 penetrating the bottom portion 12.

  The material and shape of the bottom 12 are not limited. The impact detector 2 may have any impact resistance capable of protecting the impact from the impact and can be attached to and detached from the bottom of the main body 11 as necessary. Can do. For example, instead of providing the recess 16, an annular member that can be inserted through the conical portion of the main body 11 is provided, and the annular member is disposed on the upper side of the flange 15 so as to sandwich the flange 15 from the vertical vertical direction. Also good.

  In addition to a switch for operating the impact detector 2, the operation device 22 includes an indicator lamp that is turned on based on determination of communication establishment described later. The indicator lamp corresponds to the display means of the present invention.

  The triaxial impact sensor constituting the impact detector 2 measures the impact acceleration when an impact is applied, and a known sensor capable of measuring in three axes is used.

  The arithmetic processing device constituting the impact detector 2 is a known microcomputer and has a function as a sensor arithmetic means of the present invention. Then, calculation processing is performed to compare the impact acceleration data acquired from the triaxial impact sensor with preset first threshold value, second threshold value, and third threshold value.

The first threshold is set on the assumption that an impact will occur on the road-mounted road sign 1 when a low-risk state change occurs, specifically, when the vehicle moves from the installation position or falls due to strong wind or vibration. ing. In this embodiment, 19.6 m / s ² (2G) is set as the acceleration detected by any of the three axes in the impact acceleration sensor. However, there is no restriction | limiting in a setting value, What is necessary is just to set suitably according to the material of the main-body part 10 and the bottom part 20, a dimension, a weight, etc.

The second threshold is set on the assumption of an impact that occurs on the road-mounted road sign 1 when a high-risk state change occurs, specifically, when a vehicle traveling at high speed collides. In this embodiment, 166.6 m / s ² (17G) is set as the acceleration detected by any of the three axes in the impact acceleration sensor. However, there is no restriction | limiting in a setting value, What is necessary is just to set suitably according to the material of the main-body part 10 and the bottom part 20, a dimension, a weight, etc.

  As the third threshold value, the gravitational acceleration detected by the impact acceleration sensor is set in a state where the road-mounted road sign 1 falls. In this embodiment, the z-axis is set in the direction in which the gravitational acceleration works and the x-axis and the y-axis are set in the direction in which the gravitational acceleration does not work when the road-mounted road sign 1 is normally installed. A combined value of the acceleration in the x-axis direction and the acceleration in the y-axis direction in a state where 1 falls is set.

  The arithmetic processing unit constituting the impact detector 2 also has a function as communication establishment determination means of the present invention. Then, based on the reception state of the confirmation signal transmitted from the management side device, a process for determining communication establishment with the management side device is performed. And when communication with the management side apparatus is established, the indicator lamp of the operation device 22 is turned on.

  The communication device constituting the impact detector 2 is a known communication device in the 2.4 GHz band, and has a function as a transmission unit of the present invention. Then, in the comparison calculation process in the calculation processing device, when the impact acceleration data exceeds the second threshold value, the second notification signal is instantaneously transmitted. In addition, when the impact acceleration data exceeds the first threshold without exceeding the second threshold, when the impact acceleration data exceeds the third threshold after 10 seconds from the timing when the impact acceleration data exceeds the first threshold The first notification signal is transmitted. It should be noted that there is no limitation on the timing for determining whether or not the impact acceleration data exceeds the third threshold value, and it can be set as appropriate according to the shape of the road-mounted road sign.

  The communication device constituting the impact detector 2 also has a function as a receiving means of the present invention. And when the confirmation signal transmitted from the management side apparatus is received, the information is output to the arithmetic processing apparatus. The arithmetic processing device performs communication establishment determination processing based on the reception state indicated by the information delivered from the communication device.

  In addition, the management-side apparatus receives a notification signal transmitted from the road-mounted road sign 1 when an impact is detected on the road-mounted road sign 1, and notifies a road worker or a road monitor. It is a device. It may function alone, or a plurality of devices may cooperate.

  In this embodiment, it is assumed that the confirmation signal transmitted from the management-side device is uniformly transmitted to all of the plurality of road-installed road signs 1. It may be transmitted as a response to the request signal. In that case, the communication device constituting the impact detector 2 transmits a communication request signal of a channel different from that of the first notification signal and the second notification signal.

  The sign body is not limited to a conical sign, and may be a display board made of a plate material that can be bent at the center. FIG. 4 shows an embodiment in which a display board is adopted as the sign body. In FIG. 4, parts that are substantially the same as those in the embodiment shown in FIGS. 1 to 3 are given the same reference numerals, and descriptions thereof are omitted or simplified.

  The road-mounted road sign 3 shown in FIG. 4 includes a sign body 30 made of a plate material that can be bent at the center. The sign body 30 is bent at a predetermined angle and stands on the ground, and a space (corresponding to an internal space) is formed on the back side of the display surface. And the impact detector 2 is attached to the back side of the display surface. An operating device 22 is attached to the front side of the display surface.

In the arithmetic processing unit constituting the impact detector 2 of the road-mounted road sign 3, the first threshold value is 156.8 m / s ² (16G) as an acceleration detected by any of the three axes in the impact acceleration sensor. Is set. The impact detector 2 further includes a gyro sensor. In addition to determining whether the impact acceleration data exceeds the third threshold value, the rotation angle obtained based on the measured value of the gyro sensor exceeds the fourth threshold value. Judgment is also made. The first notification signal is transmitted when the impact acceleration data exceeds the third threshold or when the rotation angle exceeds the fourth threshold.

  The rotation angle is calculated by integrating the measured values of the three axes of the gyro sensor and taking into account the offset value and the drift value due to temperature. Further, plus or minus 5 degrees is set as the fourth threshold value.

  The timing for comparing the measured value with the third threshold value and the fourth threshold value is after 30 seconds have elapsed from the timing when the impact acceleration data exceeds the first threshold value. Other settings relating to the processing are the same as those of the impact detector 2 of the road-mounted road sign 1 shown in FIGS.

1, 3 Road-mounted road sign 2 Impact detector 10, 30 Sign body 11 Body 12 Bottom 13 Mounting hole 14 Opening 15 鍔 16 Depression 17 Protrusion 18 Pedestal 19, 20 Mounting hole 21 Communication antenna 22 Operator 23 Wiring

  Further, a receiving means for receiving a confirmation signal transmitted from a management side device that receives both or either of the first notification signal and the second notification signal, and communication with the management side device based on the confirmation signal Communication establishment determination means for determining that the communication establishment is established, and display means for displaying the determination in the communication establishment determination means.

  The first notification signal may be transmitted when the impact acceleration data exceeds a third threshold after a predetermined time has elapsed from the timing when the impact acceleration data exceeds the first threshold.

Claims (5)

In the internal space of the sign body, a triaxial impact sensor, sensor computing means connected to the triaxial impact sensor, and transmission means connected to the sensor computing means are detachably arranged,
The sensor calculation means acquires impact acceleration data from the triaxial impact sensor, the impact acceleration data, a first threshold value indicating a state change with a low risk level, and a state with a higher risk level than the first threshold value. Compare with the second threshold indicating the change,
The transmission means transmits a first notification signal based on a result of the comparison calculation when the impact acceleration data does not exceed the second threshold but exceeds the first threshold, and the impact acceleration data is A road-mounted road sign that transmits a second notification signal when a threshold value is exceeded.   2. The first notification signal is transmitted when the impact acceleration data exceeds a third threshold after a predetermined time has elapsed from a timing when the impact acceleration data exceeds the first threshold. Street-mounted road sign.   Communication is established between the receiving device that receives the confirmation signal transmitted from the management-side device that receives the first notification signal and / or the second notification signal, and the management-side device based on the confirmation signal. The road-installed road sign according to claim 1 or 2, further comprising: a communication establishment determination unit that determines that the communication is established, and a display unit that displays a determination made by the communication establishment determination unit.   The sign body includes a conical body portion and a detachable bottom portion at the bottom of the body portion, and the triaxial impact sensor, the sensor calculation means, and the transmission means are disposed on the bottom portion. The road-mounted road sign according to claim 1, 2, or 3. A gyro sensor is further disposed in the internal space, and the first notification signal is obtained based on a measurement value of the gyro sensor after a predetermined time has elapsed from a timing when the impact acceleration data exceeds the first threshold. The road-mounted road sign according to claim 1, 2 or 3, which is transmitted when the rotation angle exceeds a fourth threshold value.