Crash inhibition warning device

Abstract

To provide a crash inhibition warning device for calling attention when a crash inhibition tool is not used at a height which really requires a use of the crash inhibition tool.SOLUTION: A crash inhibition warning device 1 is mounted on a crash inhibition tool 6 including: a harness part 3 to be mounted on a human body; a rope part 4 whose one end is attached to the harness part 3; and a hook part 5 attached to the other end of the rope part 4 so as to be locked to a locking object. The crash inhibition warning device 1 includes: a lock state detection section 10 for detecting whether the hook part 5 is in a lock state to the locking object; a height detection section 20 for detecting the height of the crash inhibition tool 6 from a reference surface; a notification section 30 for notifying a user of the crash inhibition tool 6 of predetermined contents; and a control section 40 for allowing the notification section 30 to perform a notification when the height from the reference surface detected by the height detection section 20 becomes equal to or more than a predetermined first height H1 and also when the lock state detection section 10 detects that the hook part 5 is not locked to the locking object.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fall prevention alarm device that issues a warning when the use of fall prevention equipment is required during work at height, etc. [Background technology]

[0002] Conventionally, there is a voice output device for a safety belt that outputs a voice message to warn the user to use the safety belt at a location above a predetermined height when the rope hook attached to the hook retaining portion of the device body attached to the harness-type safety belt is released (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-534011 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional safety belt voice output device, when the rope hook attached to the hook retainer is released, a voice message is output to warn the user to use the safety belt. In other words, even at a safe height, the voice message is output when the rope hook is released from the hook retainer, which makes it difficult for the user to use the safety belt. In addition, regardless of the height at which the safety belt is used, the voice message is output whether the rope hook is released from the hook retainer, which also poses a problem in terms of ensuring true safety.

[0005] The present invention has been developed in consideration of these problems, and aims to provide a fall prevention warning device that issues a warning when a fall prevention device (equivalent to a conventional safety belt) is not being used at a height where the use of the fall prevention device is truly necessary. [Means for solving the problem]

[0006] The present invention has been made to solve at least some of the above-mentioned problems, and can be realized as the following application examples. Note that the reference symbols and supplementary explanations in this section indicate the correspondence with the embodiments described later to help understand the present invention, and do not limit the present invention in any way.

[0007] [Application example 1] The fall prevention alarm device (1) described in Application Example 1 is A fall prevention warning device (1) attached to a fall prevention device (6) including a harness part (3) attached to a human body, a rope part (4) having one end attached to the harness part (3), and a hook part (5) attached to the other end of the rope part (4) and capable of being engaged with an object to be engaged, a locking state detection unit (10) that detects whether the hook portion (5) is locked to the locking object; a height detection unit (20, 40) for detecting the height of the fall prevention device (6) from a reference surface; a notification unit (30) that notifies a user of the fall arrest device (6) of predetermined content; a height setting unit (40) that can set the height at which the notification unit (30) issues a notification; a control unit (40) that issues a notification via the notification unit (30) when the height from the reference plane detected by the height detection unit (20, 40) becomes equal to or greater than the first height (H1) set by the height setting unit (40) and the locking state detection unit (10) detects that the hook portion (5) is not locked to the locking object; and The gist of the system is that it is equipped with the following:

[0008] In such a fall prevention alarm device (1), an alarm is issued when the hook portion (5) is not engaged with the engaging object even though the body of the user wearing the fall prevention device (6) is at a first height (H1) or more from the reference plane.

[0009] In other words, if the first height (H1) is set appropriately, an alarm will only be issued when it is necessary to engage the hook portion (5) with the engaging object; in other words, no alarm will be issued when it is not necessary to engage with the engaging object, making the fall arrest warning device (1) easy to use for the user of the fall arrest equipment (6) and capable of ensuring the safety of the user.

[0010] [Application example 2] The fall prevention alarm device (1) according to Application Example 2 is the fall prevention alarm device (1) according to Application Example 1, The notification unit (30) a notification selection unit (32) that can select whether or not to issue a notification; The control unit (40) A fall prevention alarm device (1) in which, if the height from the reference plane detected by the height detection unit (20, 40) is equal to or greater than the first height (H1) and less than the second height (H2) set by the height setting unit (40), and if the notification selection unit (32) has selected not to notify, the notification unit (30) does not issue a notification, and, if the height from the reference plane detected by the height detection unit (20, 40) is equal to or greater than the second height (H2), even if the notification selection unit (32) has selected not to notify, the notification unit (30) issues a notification.

[0011] In such a fall prevention alarm device (1), it is possible to select whether or not to issue an alarm when the height is equal to or greater than the first height (H1) and less than the second height (H2), and an alarm is always issued when the height is equal to or greater than the second height (H2). Therefore, by setting the first height (H1) and the second height (H2) to legally specified heights, the fall prevention alarm device (1) can be made to be easy to use while also ensuring safety.

[0012] [Application example 3] The fall prevention alarm device (1) described in Application Example 3 is the fall prevention alarm device (1) described in Application Example 1 or Application Example 2, The height detection unit (20, 40) a reference air pressure detector (23) that is installed on the reference surface and detects a reference air pressure; a current air pressure detector (26) attached to the fall arrest device (6) and detecting the air pressure at the height at which the device is attached; a height calculation unit (40) that calculates the height of the fall arrest device (6) relative to the reference surface based on the difference between the air pressure detected by the current air pressure detector (26) and the reference air pressure detected by the reference air pressure detector (23); The gist is that it is equipped with the following.

[0013] Such a fall prevention warning device (1) can accurately detect the current height because the height detection unit (20, 40) calculates the height based on the difference between the air pressure at the reference surface and the air pressure at the current height.

[0014] The fall prevention alarm device (1) described in Application Example 4 is the fall prevention alarm device (1) described in Application Example 1 or Application Example 2, a current air pressure detector (26) attached to the fall prevention device (6) and detecting the air pressure at the height at which the device is attached; The height detection unit (20, 40) When the current atmospheric pressure detected by the current atmospheric pressure detector (26) becomes an atmospheric pressure corresponding to the preset first height (H1), it is determined that the current atmospheric pressure is the first height, When the current atmospheric pressure reaches an atmospheric pressure equivalent to the second height (H2) that is set in advance, it is determined that the atmospheric pressure is the second height.

[0015] Such a fall prevention alarm device can be a fall prevention alarm device (1) with a simple configuration.

[0016] [Application example 4] In the fall prevention alarm device (1) described in Application Example 4, in the fall prevention alarm device (1) described in any one of Application Examples 1 to 3, an information output unit (50) for outputting information to the outside, The control unit (40) When the time during which the notification is being made by the notification unit (30) exceeds a predetermined time, notification information indicating that the notification has been made for more than the predetermined time is output via the information output unit (50).

[0017] Such a fall prevention alarm device (1) outputs notification information when a predetermined period of time has elapsed during which the hook portion (5) must be locked to the locking object. Therefore, for example, when a manager or the like receives the notification information, the manager can know whether the user of the fall prevention device (6) has not locked the hook portion (5), and can perform better safety management.

[0018] [Application example 5] The fall prevention alarm device (1) described in Application Example 5 is the fall prevention alarm device (1) described in Application Example 4, The control unit (40) The gist of the invention is that identification information determined for each of the fall arrest devices (6) is stored, and when the alarm information is output, the identification information is output together with the alarm information.

[0019] In such a fall prevention alarm device (1), identification information specific to each fall prevention device (6) is output along with the alarm information, so that the administrator or the like can know which user of the fall prevention device (6) has not engaged the hook portion (5), and the administrator can carry out better safety management. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a block diagram showing the general functional configuration of a fall prevention alarm device. [Figure 2] FIG. 1 is a diagram showing the general configuration of a fall prevention device. [Figure 3] FIG. 2 is a block diagram showing a schematic configuration of a height detection unit. [Figure 4] 10 is a flowchart showing the flow of a notification control process executed by a control unit. [Figure 5]10 is a flowchart showing the flow of height calculation processing, which is a subroutine of the notification control processing. [Figure 6] FIG. 10 is a block diagram showing the general configuration of a fall arrest device in a third embodiment. [Figure 7] 11 is a flowchart showing the flow of a height calculation process in the third embodiment. [Figure 8] FIG. 10 is a block diagram showing a schematic configuration of a reference data detection unit in a fourth embodiment. [Figure 9] 13 is a flowchart showing the flow of a height calculation process in the fourth embodiment. [Figure 10] 10 is a flowchart showing the flow of an initial correction process in the fourth embodiment. [Figure 11] 10 is a flowchart showing the flow of notification control processing executed by a control unit 40 in the fifth embodiment. [Figure 12] 13 is a flowchart showing the flow of an air pressure calculation process, which is a subroutine of the notification control process in the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments to which the present invention is applied will be described with reference to the drawings. Note that the embodiments of the present invention are not limited to the following embodiments, and various forms may be adopted as long as they fall within the technical scope of the present invention.

[0022] [First embodiment] Before describing the fall prevention warning device 1, a fall prevention tool 6 to which the fall prevention warning device 1 is attached will be described with reference to Fig. 1. Fig. 1 is a diagram showing a schematic configuration of the fall prevention tool 6.

[0023] As shown in FIG. 1, a fall arrest device 6 includes a harness portion 3, a rope portion 4, a hook portion 5, and the like. The harness part 3 is a part for attaching the fall arrest device 6 to the human body, and is attached to the thighs of the human body. the pair of shoulder belts 3e that are passed over the shoulders of the person; D-rings 3f to which rope portions 4 are attached; D-ring stoppers 3g that are integrated with the D-rings and hold the crossing portions of the shoulder belts 3e in order to attach the D-rings 3f to the pair of shoulder belts 3e; length adjustment rings 3h that adjust the length of the shoulder belts 3e; a chest band 3i that is attached to the shoulder belts 3e and wrapped around the chest; and a hook storage portion 3j that stores the hook portion 5 when it is released from the state of being fastened.

[0024] One end of the rope part 4 is attached to the D-ring 3f of the harness part 3 via a shock absorber 4a, and the other end of the rope part 4 is attached to a hook part 5. This hook part 5 is hooked onto a target object such as a pole, rope, or string to prevent the user from falling from a height.

[0025] Next, the configuration of the fall prevention alarm device 1 will be described with reference to Fig. 2. Fig. 2 is a block diagram showing a schematic functional configuration of the fall prevention alarm device 1. As shown in FIG. 2, the fall prevention alarm device 1 includes a locking state detection unit 10, a height detection unit 20, a notification unit 30, a control unit 40, and an information output unit 50.

[0026] The locking state detection unit 10 is a device that detects whether or not the hook portion 5 is locked to the locking object. The configuration of the locking state detection unit 10 will now be described with reference to Fig. 3. Fig. 3 is a diagram showing a schematic configuration of the locking state detection unit 10.

[0027] As shown in Figure 3, it is equipped with an optical sensor A12 attached to the curved part at the tip of the main body of the hook part 5, an optical sensor B14 attached to the main body of the hook part 5 at a position opposite the tip of the anti-detachment fitting of the hook part 5, and an optical sensor C16 attached to the position of the hook storage part 3j.

[0028] The optical sensor A12 is an optical sensor that detects the state in which the hook portion 5 is locked to the locking object, and detects whether or not an object is present in the area indicated by R (area R) in FIG. 3(A). The optical sensor B14 is an optical sensor that detects a state in which the hook portion 5 is about to be released from the object to be locked, and detects whether or not an object is present in the area indicated by O (area O) in FIG. 3(A). The optical sensor C16 is an optical sensor that detects whether the hook portion 5 is stored in the storage hook, and detects whether an object is present in the area indicated by S in FIG. 3(B) (area S).

[0029] The state of the hook portion 5 is detected as "in use," "in storage," "disengaged," or "attempting to disengage" based on a combination of the on / off states of the optical sensors A12, B14, and 16C. Note that the state in which the optical sensors A12 to C16 detect an object such as a locking target is called "on," and the state in which they do not detect an object is called "off."

[0030] Specifically, the state is detected as shown in the following (A) to (D) (see FIG. 3(C)). (A) When optical sensor A12 is on, optical sensor B14 is off, and optical sensor C16 is off, it is "in use."

[0031] (a) When optical sensor A12 is on, optical sensor B14 is off, and optical sensor C16 is on, it is "storing" (c) If optical sensor A12 is off, optical sensor B14 is off, and optical sensor C16 is off, it is "disconnected."

[0032] (D) When optical sensor A12 is off, optical sensor B14 is on, and optical sensor C16 is off, I'm trying to do that."

[0033] The height detection unit 20 is a device for detecting the height of the fall arrest device 6 from a reference surface. As shown in FIG. 2, the height detection unit 20 includes a reference data detection unit 21 and a current data detection unit 22.

[0034] The reference data detection unit 21 includes a reference atmospheric pressure detector 23 , a reference air temperature detector 24 , and a reference data transmitter 25 . The reference air pressure detector 23 is a device that is installed on a reference surface, such as the ground, which serves as a reference position for detecting height, and detects the reference air pressure at the reference surface.It is equipped with a barometric pressure sensor that detects air pressure and converts it into data.

[0035] The reference air temperature detector 24 is disposed near the reference atmospheric pressure detector 23 and is a thermometer that detects the reference air temperature at the reference surface and converts it into data.

[0036] The reference data transmitter 25 is a transmitter that transmits the reference atmospheric pressure data detected by the reference atmospheric pressure detector 23 and the reference temperature data detected by the reference temperature detector 24 to the control unit 40. In this embodiment, Bluetooth (registered trademark) is used for the transmission section. In FIG. 2, a dashed line is used to indicate that wireless communication is performed between the reference data transmitter 25 and the control unit 40.

[0037] The current data detector 22 includes a current atmospheric pressure detector 26 and a current temperature detector 27 . The current air pressure detector 26 is attached near the D-ring 3f of the shoulder belt 3e of the fall arrest device 6, and is a device that detects the air pressure at the attached position.It is an air pressure sensor that detects the air pressure, converts it into data, and outputs it to the control unit 40.

[0038] The current air temperature detector 27 is a thermometer that is disposed near the current air pressure detector 26 and detects the air temperature at the location where it is attached, converts it into data, and outputs it to the control unit 40.

[0039] The alarm unit 30 is a device that notifies the user of the fall arrest device 6 of predetermined content. The predetermined content may be a sound alarm using a simple alarm sound or voice, an optical alarm such as a flashing light or a screen display using characters or icons, or a display that combines these.

[0040] The notification unit 30 is also provided with a notification selection unit 32 that allows the user to select whether or not to issue a notification, making it possible to switch whether or not to issue a notification. Specifically, this is a mechanical slide switch that the user can switch on / off, and when it is on, a notification is issued, and when it is off, no notification is issued.

[0041] The control unit 40 is a device that controls (notification control) whether or not to issue an alarm in the notification unit 30 when a predetermined condition is met, such as when the height from the reference plane detected by the height detection unit 20 meets a certain condition, and is equipped with a CPU, ROM, RAM, I / O, a clock timer, etc., which are not shown.

[0042] The control unit 40 also includes a receiver (Bluetooth in this embodiment) not shown for receiving data transmitted from the reference data transmitter 25 of the reference data detection unit 21, and also includes an information output unit 50. The details of the notification control process in the control unit 40 will be described later.

[0043] The information output unit 50 is a device for outputting information to the outside, and is a transmitter using radio waves. In this embodiment, Bluetooth is used.

[0044] (Contents of notification control process) Here, the contents of the notification control process executed by the control unit 40 will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the flow of the notification control process.

[0045] The notification control process is started by a CPU (not shown) when the power to the fall control alarm device 1 is turned on, and first, in S100, the CPU acquires various settings stored in a ROM (not shown), as shown in Fig. 4. The various settings include the first height H1 (2 m in this embodiment), the second height H2 (6.75 m in this embodiment), the duration T of the notification (1 minute in this embodiment), the number N0 of consecutive data acquisitions from the reference data detection unit 21 and the current data detection unit 22, the email address and MAC address of the destination to receive a notification that the notification duration has elapsed, etc.

[0046] In the following S105, a height calculation process is performed to calculate the height based on the data acquired from the height detection unit 20. The height calculation process will be described in detail later. In the next step S110, it is determined whether the height acquired in step S105 is equal to or greater than H1 (2 m). If it is determined that the height is equal to or greater than H1 (2 m) (S110: Yes), the process proceeds to step S115. If it is determined that the height is less than H1 (2 m) (S110: No), the process returns to step S105, and height acquisition is repeated.

[0047] Here, in S105, since N0 pieces of calculated height data are stored in a RAM (not shown), if half or more of the N0 pieces of height data are H1 or more, it is determined that the height is H1 or more.

[0048] In S115, it is determined whether the height acquired in S105 is equal to or greater than H2 (6.75 m). If it is determined that the height is equal to or greater than H2 (6.75 m) (S115: Yes), the process proceeds to S130, and if it is determined that the height is less than H2 (6.75 m) (S115: No), the process proceeds to S120.

[0049] In S115 as well, if half or more of the N0 pieces of height data calculated in S105 are equal to or greater than H2, it is determined that the height is equal to or greater than H2. In S120, the state (on or off) of the notification selection unit 32 is acquired. That is, the state of whether the notification unit 30 will make a notification (notification selection unit 32 on) or will not make a notification (notification selection unit 32 off) is acquired.

[0050] In the next S125, it is determined whether the state of the notification selection unit 32 acquired in S120 is on. If it is determined that the state is on (S125: Yes), the process proceeds to S130, and if it is determined that the state is not on (i.e., off) (S125: No), the process returns to S105.

[0051] In S130, the state of the locking state detection unit 10 is acquired. That is, it is acquired which state the locking state detection unit 10 is in (one of the states "in use", "stored", "detached", and "attempting to detach") shown in Fig. 3(C).

[0052] In the next S135, it is determined whether the state of the locking state detection unit 10 acquired in S130 is "in use." If it is determined that the state of the locking state detection unit 10 is "in use" (S135: Yes), the process returns to S105, and if it is determined that the state is not "in use" (S135: No), the process proceeds to S140.

[0053] In S140, the alarm unit 30 detects that the fall arrest device 6 is not being used normally, i.e., , it notifies that the hook portion 5 is not hooked to the locking object. In the next S145, a timing timer (not shown) determines whether one minute or more has passed since the notification unit 30 started notifying. If it is determined that one minute or more has passed (S145: Yes), the process proceeds to S150, and if it is determined that the elapsed time is less than one minute (S145: No), the process returns to S105.

[0054] In S150, a message that the notification time has elapsed for one minute or more is sent to the email address acquired in S100 via the information output unit 50. After sending the email, the process returns to S105. The control process ends when the power to the fall prevention alarm device 1 is turned off.

[0055] (Height calculation process) Here, the height calculation process executed in the subroutine S105 will be described with reference to Fig. 5. Fig. 5 is a flowchart showing the flow of the height calculation process.

[0056] As shown in FIG. 5, in the height calculation process, first, in S200, the CPU sets the number of height calculations N to 0. In the next step S205, the reference atmospheric pressure data is obtained from the reference atmospheric pressure detector 23, and the reference temperature data is obtained from the reference temperature detector 24.

[0057] In the next step S210, current atmospheric pressure data is obtained from the current atmospheric pressure detector 26, and current temperature data is obtained from the current temperature detector 27. In the next step S215, the altitude is calculated. The calculated altitude is a combination of the reference altitude (H0) calculated from the reference atmospheric pressure and reference temperature acquired in step S205 and the current altitude (H0) calculated from the current atmospheric pressure and current temperature acquired in step S210. N ) The altitude is calculated using the following formula 1.

[0058]

number

[0059] In the next step S220, the reference altitude (H0) calculated in step S215 is compared with the current altitude (H N ) and calculate the current height (H) from the reference plane using the following formula 2, and store it in RAM (not shown). O The data is stored in these storage areas in sequence. H=H N -H0... Formula 2

[0060] In the next S225, the number of height calculations is incremented by 1, and in the next S230, it is determined whether the number of height calculations is less than the number of height calculations (N0). If it is determined that N is less than N0 (S230: Yes), the process returns to S205, where the height calculation and storage in RAM are repeated. On the other hand, if it is determined that N is equal to or greater than N0 (S230: No), the process returns to S200, where the height calculation and storage in RAM are repeated.

[0061] (Features of fall prevention alarm devices) In the fall prevention alarm device 1, if the first height H1 is set appropriately, the hook portion 5 An alarm is issued only when it is necessary to engage with the engaging object. In other words, no alarm is issued when there is no need to engage with the engaging object, making the fall arrest warning device 1 easy to use for the user of the fall arrest device 6 and ensuring the safety of the user.

[0062] Furthermore, the fall prevention alarm device 1 allows the user to select whether or not to issue an alert when the height is equal to or greater than the first height H1 and less than the second height H2, and always issues an alert when the height is equal to or greater than the second height H2. Therefore, by setting the first height H1 and the second height H2 to the legally mandated heights, the fall prevention alarm device 1 can be made to be easy to use while also ensuring safety.

[0063] Furthermore, the fall prevention warning device 1 can accurately detect the current height because the height detection unit 20 calculates the height based on the difference between the air pressure at the reference surface and the air pressure at the current height. Furthermore, when the period during which the hook portion 5 must be locked to the locking object has elapsed a predetermined time, notification information to that effect is output.

[0064] Therefore, for example, when a manager or the like receives the alarm information, the manager can know whether the user of the fall arrest device 6 has engaged the hook portion 5, and the manager can carry out better safety management.

[0065] [Second embodiment] Next, a second embodiment will be described. Since the configuration of the fall prevention alarm device 1 in the second embodiment is the same as that of the fall prevention alarm device 1 in the first embodiment, a description of the same parts will be omitted and only the different parts will be described.

[0066] The fall prevention alarm device 1 in the second embodiment is configured to output identification information defined for each fall prevention device 6 to which the fall prevention alarm device 1 is attached. Specifically, when acquiring various settings in S100 in the notification control process (see FIG. 4) executed by the control unit 40, the identification information defined for each fall prevention device 6 is also acquired. A MAC address is used as the identification information.

[0067] Then, in S150 of the notification control process shown in FIG. 4, when sending an email, the identification information is also sent to the email address acquired in S100 along with a message that "the notification time has elapsed for one minute or more."

[0068] By doing this, identification information specified for each fall arrest device 6 is output along with the alarm information, so that managers and others can know which user of the fall arrest device 6 has not engaged the hook portion 5, allowing the managers to carry out better safety management.

[0069] [Third embodiment] Next, a third embodiment will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a block diagram showing the general configuration of a fall prevention device 2 in the third embodiment. Fig. 7 is a flowchart showing the flow of the height calculation process in the third embodiment. Note that the configuration of the fall prevention warning device 2 in the third embodiment is the same as that of the fall prevention warning device 1 in the first embodiment except for the part related to the height detection unit 20, so a description of the same parts will be omitted and only the different parts will be described.

[0070] As shown in Figure 6, the fall prevention warning device 2 uses a GPS receiver as the height detection unit 20 (hereinafter, in the third embodiment, the height detection unit 20 is also referred to as the GPS receiver 20), and outputs the current altitude measured by the GPS receiver 20 to the control unit 40.

[0071] Furthermore, the altitude of the standard plane measured in advance by the GPS receiver 20 or the like is set as the content of the various settings acquired in S100 of the notification control process shown in Fig. 4, and as shown in Fig. 7, the current altitude is acquired from the GPS receiver in S217 instead of S205 to S215 in Fig. 5. Then, S225 and S230 are executed in the same manner as in Fig. 5.

[0072] In this way, even if a GPS receiver 20 is used in place of an air pressure sensor or a temperature sensor in the height detection unit 20, the same effect as the fall prevention warning device 1 in the first embodiment can be obtained, although the accuracy of height calculation will be slightly lower.

[0073] [Fourth embodiment] Next, a fourth embodiment will be described with reference to Fig. 8 and Fig. 9. Fig. 8 is a block diagram showing a schematic configuration of a reference data detection unit 61 (corresponding to the reference data detection unit 21 in the first embodiment) in the fourth embodiment. Fig. 9 is a flowchart showing the flow of height calculation processing, which is a subroutine of the notification control processing in the fourth embodiment.

[0074] In addition, since the configuration and various processes of the fall prevention alarm device 7 in the fourth embodiment are almost the same as those of the fall prevention alarm device 1 in the first embodiment except for the parts related to the height detection unit 20, explanations of the same parts will be omitted and only the different parts will be explained.

[0075] (Configuration of fall prevention alarm device) As shown in FIG. 8, the reference data detection unit 61 in the fourth embodiment includes a display unit 62 and an input unit 63 in addition to the reference atmospheric pressure detector 23, the reference temperature detector 24, and the reference data transmitter 25.

[0076] The display unit 62 is a device that displays characters and images, such as a liquid crystal display device, and is the part that mainly presents various information to the user of the fall prevention warning device 7, such as displaying information related to the initial correction described below.

[0077] The input unit 63 is a section where the user can make various inputs, mainly regarding initial correction, etc. In the fourth embodiment, inputs are made using push buttons, but other methods may also be used, such as a touch screen, numeric keypad, or keyboard arranged on the surface of the display unit.

[0078] (Height calculation process) Next, the height calculation process in the fourth embodiment will be described with reference to Fig. 9. As shown in Fig. 9, in the height calculation process in the fourth embodiment, in the height calculation process in the first embodiment (see Fig. 5), the initial normal process of S203 is executed between S200 and S205, and the reference atmospheric pressure is corrected between S210 and S215.

[0079] The initial correction process of S203 is a process for correcting errors in atmospheric pressure due to individual differences between the reference atmospheric pressure detector 23 of the reference data detection unit 21 and the current atmospheric pressure detector 26 of the current data detection unit 22 shown in Fig. 2. The details of the initial correction process will be described later.

[0080] After S203 is executed, S205 and S210 are executed in the same manner as the height calculation process in the first embodiment. In the next step S213, the reference atmospheric pressure is corrected by adding or subtracting a correction value stored in the RAM in the initial correction process (described later) from the reference atmospheric pressure acquired in step S205 to obtain the corrected reference atmospheric pressure.

[0081] In the next step S215, the reference altitude (H0) is calculated using the corrected reference atmospheric pressure obtained in step S213 instead of the reference atmospheric pressure obtained in step S205, and the current altitude (H0) calculated from the current atmospheric pressure and the current temperature obtained in step S210 is calculated using the formula 1. N ) is calculated using Equation 1. Following S215, S220 to S230 are executed.

[0082] (Initial correction process) Here, the initial correction process executed in the subroutine S203 of the height calculation process will be described with reference to Fig. 10. Fig. 10 is a flowchart showing the flow of the initial correction process.

[0083] 10, in the initial correction process, first, in S300, a CPU (not shown) displays an initial correction on the display unit 62. The initial correction display is a display that prompts the user of the fall prevention alarm device 1 to input whether or not to correct the individual difference between the reference air pressure detector 23 and the current air pressure detector 26.

[0084] Specific display contents include warnings such as "Place the current data detection unit 22 at the same height as the reference data detection unit 21" when performing initial correction, as well as a message instructing the user to press the "YES" button to perform initial correction or the "NO" button if not.

[0085] In the following S305, correction execution input information is acquired from the input unit 63. Specifically, information on whether the "YES" button or the "NO" button has been pressed is acquired.

[0086] In the next S310, it is determined whether or not an input for executing correction has been made in S305 (whether or not information indicating that the "YES" button has been pressed has been acquired). If it is determined that an input for executing initial correction has been made (S310: Yes), the process proceeds to S315, and if it is determined that an input for executing initial correction has not been made (S310: No), the process proceeds to S330.

[0087] In S315, the reference atmospheric pressure data is obtained from the reference atmospheric pressure detector 23 and stored in the RAM, and then in the following S320, the current atmospheric pressure data is obtained from the current atmospheric pressure detector 26.

[0088] In the next S325, the difference between the current atmospheric pressure data acquired in S325 and the reference atmospheric pressure data acquired in S315 is calculated, and in the next S335, the value calculated in S330 is stored in RAM as a correction value, and the process ends.

[0089] On the other hand, in S330, the correction value is set to 0, and then in S335, the correction value is stored in RAM, and the process ends.

[0090] In the fall prevention warning device 7 described above, when in use, correction is made for individual differences between the reference air pressure detector 23 of the reference data detection unit 21 and the current air pressure detector 26 of the current data detection unit 22, thereby improving the accuracy of the height calculated based on the difference between the reference air pressure and the current air pressure.

[0091] [Fifth embodiment] Next, a fifth embodiment will be described with reference to Fig. 11 and Fig. 12. Fig. 11 is a flowchart showing the flow of notification control processing executed by the control unit 40 in the fifth embodiment. Fig. 12 is a flowchart showing the flow of air pressure calculation processing, which is a subroutine of the notification control processing in the fifth embodiment.

[0092] The configuration and various processes of the fall prevention alarm device 7 in the fifth embodiment are almost the same as those of the fall prevention alarm device 1 in the first embodiment, so explanations of the same parts will be omitted and only the different parts will be explained.

[0093] As shown in FIG. 11, in the notification control process in the fifth embodiment, first, in S400, The CPU acquires various settings stored in a ROM (not shown), such as the first height H1 (2 m in this embodiment), the second height H2 (6.75 m in this embodiment), the duration T of the notification (1 minute in this embodiment), the number N0 of consecutive data acquisitions from the reference data detection unit 21 and the current data detection unit 22, the email address and MAC address of the destination to receive a notification that the notification duration has elapsed, etc.

[0094] In the next step S405, an air pressure calculation process is performed to calculate the air pressure based on the data acquired from the height detection unit 20. The air pressure calculation process will be described in detail later. In the next step S410, it is determined whether the current atmospheric pressure calculated in step S405 is equal to or greater than H1 (2 m). If it is determined that the current atmospheric pressure is equal to or greater than H1 (2 m) (S410: Yes), the process proceeds to step S415. If it is determined that the current atmospheric pressure is less than H1 (2 m) (S410: No), the process returns to step S405, and the calculation of the current atmospheric pressure is repeated.

[0095] Here, in S405, N0 pieces of calculated current atmospheric pressure data are stored in a RAM (not shown), and if more than half of the N0 pieces of current atmospheric pressure data correspond to H1 or higher, it is determined that the height corresponds to H1 or higher.

[0096] In S415, it is determined whether the current atmospheric pressure calculated in S405 is equivalent to or greater than H2 (6.75 m). If it is determined that the current atmospheric pressure is equivalent to or greater than H2 (6.75 m) (S415: Yes), the process proceeds to S430, and if it is determined that the altitude is equivalent to or less than H2 (6.75 m) (S415: No), the process proceeds to S420.

[0097] In S415, if more than half of the N0 pieces of current atmospheric pressure data calculated in S405 are equivalent to H2 or higher, it is determined that the current atmospheric pressure is equivalent to H2 or higher. In S420, the state (on or off) of the notification selection unit 32 is acquired. That is, the state of whether the notification unit 30 will make a notification (notification selection unit 32 on) or not (notification selection unit 32 off) is acquired.

[0098] In the next S425, it is determined whether the state of the notification selection unit 32 acquired in S420 is on. If it is determined that the state is on (S425: Yes), the process proceeds to S430, and if it is determined that the state is not on (i.e., off) (S425: No), the process returns to S405.

[0099] In S430, the state of the locking state detection unit 10 is acquired. That is, it is acquired which state the locking state detection unit 10 is in (one of the states "in use", "stored", "detached", and "attempting to detach") shown in Fig. 3(C).

[0100] In the next S435, it is determined whether the state of the locking state detection unit 10 acquired in S430 is "in use." If it is determined that the state of the locking state detection unit 10 is "in use" (S435: Yes), the process returns to S405, and if it is determined that the state is not "in use" (S435: No), the process proceeds to S440.

[0101] In S440, the notification unit 30 notifies that the fall arrest device 6 is not being used normally, that is, that the hook portion 5 is not hooked to the locking object. In the next S445, a timing timer (not shown) determines whether or not one minute or more has passed since the notification unit 30 started notifying the user. If it is determined that one minute or more has passed (S445: Yes), the process proceeds to S150, and if it is determined that the elapsed time is less than one minute (S445: No), the process returns to S405.

[0102] In S450, a message that the notification time has elapsed for one minute or more is sent to the email address acquired in S400 via the information output unit 50. After sending the email, the process returns to S405. The control process ends when the power to the fall prevention alarm device 1 is turned off.

[0103] (Air pressure calculation process) Here, the height calculation process executed in the subroutine S405 will be described with reference to FIG.

[0104] As shown in FIG. 12, in the atmospheric pressure calculation process, first, in S500, the CPU sets the number of times N of atmospheric pressure calculations to 0. In the next S505, the reference atmospheric pressure data (P0) is obtained from the reference atmospheric pressure detector 23, and the reference temperature data (T0) is obtained from the reference temperature detector 24.

[0105] In the next step S510, the current atmospheric pressure data (P meas ) and obtains the current temperature data (T meas ) to get the In the next step S515, the current atmospheric pressure is calculated. h ) is calculated from the reference atmospheric pressure (P0) and reference temperature (T0) acquired in S505 using the following formula 2, and is stored in RAM, after which the process returns to S500.

[0106]

number

[0107] In the next step S520, the number of height calculations is incremented by 1, and in the next step S525, it is determined whether the current number of air pressure calculations is less than the current number of air pressure calculations (N0). If it is determined that N is less than N0 (S525: Yes), the process returns to S505, and height calculation and storage in RAM are repeated. If it is determined that N is equal to or greater than N0 (S525: No), the process proceeds to S530.

[0108] In S530, the N0 calculated current atmospheric pressure values ​​stored in the RAM are averaged and stored in the RAM as the current atmospheric pressure value, after which the process returns to S500 and the calculation of the current atmospheric pressure and storage in the RAM are repeated. The fall prevention warning device 1 that performs this current air pressure calculation process can also calculate the current altitude, and can provide the same effects as the fall prevention warning device 1 of the first embodiment.

[0109] (Other embodiments) (1) In the above embodiment, the reference plane for detecting height is the ground. However, in the case of a building such as a multi-story building, the reference plane may be the floor where construction work is completed, or a work floor as defined in the “Guidelines for the Safe Use of Fall Arrest Equipment” (Notification No. 0622-2 dated June 22, 2018) established by the Ministry of Health, Labor and Welfare.

[0110] (2) In the above embodiment, the height detection unit 20 is configured using an air pressure sensor, a temperature sensor, or a GPS receiver, but height may be detected using other methods. For example, height may be detected using the following methods (A) to (C).

[0111] (A) Height detection method using UWB (Ultra Wide Band) tags and UWB sensors (a) A method in which an optical sensor is installed at a predetermined position (H1 or H2) and the worker's height is detected based on the on / off status of the optical sensor. (c) A method of measuring height using a BLE (Bluetooth Low Energy) beacon and a gateway terminal

[0112] (3) In the above embodiment, data and the like are sent and received using Bluetooth, but a wireless LAN module conforming to IEEE 802.11 may also be used, or other wireless communication standards (ZigBee, LTE, etc.) may also be used.

[0113] (4) In the above embodiment, in determining the height in S110 and S115, it was determined whether or not more than half of the N0 height data were equal to or greater than H1, or whether or not they were less than H2. However, it may also be determined by the following (a) or (b). (a) Determine based on the average value of N0 height data. (a) The height H1 is determined by the minimum value of the N0 pieces of height data, and the height H2 is determined by the maximum value of the N0 pieces of height data.

[0114] (5) In the fourth embodiment, the user inputs whether or not to perform initial correction after the initial correction display, but initial correction may be always performed. In other words, initial correction may always be performed without displaying initial correction in S300, acquiring correction execution status in S305, and determining whether or not correction input has been made in S310.

[0115] (6) In the above embodiment, the notification time in the notification unit 30 is set to one minute, but the notification time may be set to a time other than one minute, and the notification may end when the set time has elapsed.

[0116] (7) In addition, in the above embodiment, the notification unit sends a message to an email address informing the user that the notification time has elapsed. However, the message may be written to a database on the cloud in addition to or instead of sending an email.

[0117] (8) In addition to the above embodiment, the following processes (a) to (h) may be performed when data is acquired and processed by each sensor. (a) Comparison and correction with meteorological data The system compares the real-time ground pressure obtained from the weather data API (application programming interface) with the measured value of the reference pressure detector 23, determines whether the difference between the ground pressure obtained from the weather data API and the measured value of the reference pressure detector 23 is within a certain range, and if it is not within the certain range, corrects the measured value of the reference pressure detector 23 to the ground pressure obtained from the weather data API. This makes it possible to prevent long-term drift of the measured value of the reference pressure detector 23.

[0118] (a) Calibration correction using a Kalman filter The error in atmospheric pressure due to individual differences between the reference atmospheric pressure detector 23 and the current atmospheric pressure detector 26 in the initial correction process of the above embodiment is stored in memory in the control unit 40, and correction is made for drift that occurs over time, etc. For example, when the user of the fall prevention warning device 1, 2, 7 is moving at low speed, such as walking or going up and down a gentle slope, a Kalman filter may be used to estimate and correct the drift of the current atmospheric pressure detector 26.

[0119] (c) Temperature change correction Since the current atmospheric pressure detector 26 is sensitive to temperature changes, calibration correction according to temperature fluctuations may be incorporated. For example, if the temperature difference between the ground and the measurement point (the temperature difference between the current atmospheric pressure detector 26 and the reference atmospheric pressure detector 23) exceeds a predetermined value, initial correction processing may be performed.

[0120] (d) Sensor noise reduction The atmospheric pressure data from the current atmospheric pressure detector 26 may be subjected to a smoothing filter such as a moving average filter or an exponentially weighted moving average to reduce noise.

[0121] (e) Exclusion of outliers To reduce the impact of minute fluctuations in atmospheric pressure, a "sudden change in a short period of time" in the atmospheric pressure currently detected by the atmospheric pressure detector 26 may be treated as an abnormal value and excluded from the atmospheric pressure data. For example, if there is an atmospheric pressure change equivalent to an altitude change of ±3 m in one second, the atmospheric pressure may be ignored as an abnormal value.

[0122] (F) Consideration of the effects of wind speed and weather Since atmospheric pressure changes with wind strength and weather changes, an interface may be provided in the control unit 40 so that real-time weather information can be acquired via the Internet, and atmospheric pressure data may be corrected using the real-time weather information acquired via the Internet. For example, altitude may be corrected if there is a change in atmospheric pressure of a preset value within a predetermined period of time.

[0123] (G) Use in conjunction with GPS and IMU In addition to calculating altitude using atmospheric pressure data, the atmospheric pressure data is corrected using GPS and an IMU (Inertial Measurement Unit). For example, even if there is a change in altitude detected by the height detection unit 20, if the IMU does not detect any change (movement), this may be considered to be an error in the atmospheric pressure data.

[0124] (H) Correction by machine learning The control unit 40 may use a machine learning model to learn the relationship between past altitude data and atmospheric pressure data, predict the degree of altitude error that the current atmospheric pressure difference (the difference between the current atmospheric pressure detector 26 and the reference atmospheric pressure detector 23) will cause, and correct the altitude accordingly. Furthermore, the accuracy of altitude estimation may be improved by using logistic regression analysis or LSTM (short for Long Short Term Memory). [Explanation of symbols]

[0125] 1, 2, 7 ... Fall arrest warning device 3 ... Harness section 3a ... Thigh belt 3b ... Pelvic belt 3c ... Work belt 3d ... Buckle 3e ... Shoulder belt 3f ... D-ring 3g ... D-ring stopper 3h ... Length adjustment ring 3i ... Chest strap 3j ... Hook storage section 4 ... Rope section 4a ... Shock absorber 5 ... Hook section 6 ... Fall arrest device 10 ... Locking status detection section 12 ... Optical sensor A 14 ... Optical sensor B 16 ... Optical sensor C 20 ... Height detection section 21 ... Reference data detection section 22 ... Current data detection section 23 ... Reference air pressure detector 24 ... Reference air temperature detector 25 ... Reference data transmitter 26 ... Current air pressure detector 27 ... Current air temperature detector 30 ... Notification section 32 ... Notification selection section 40 ... Control section 50... Information output unit 61... Reference data detection unit 62... Display unit 63... Input unit.

Claims

1. A fall prevention alarm device attached to a fall prevention device comprising: a harness portion attached to a human body; a rope portion having one end attached to the harness portion; and a hook portion attached to the other end of the rope portion and capable of being engaged with an object to be engaged; a locking state detection unit that detects whether the hook portion is in a locked state with the locking object; a height detection unit for detecting the height of the fall arrest device from a reference surface; a notification unit that notifies a user of the fall arrest device of predetermined content; a control unit that causes the notification unit to issue a notification when the height from the reference plane detected by the height detection unit becomes equal to or greater than a predetermined first height and the locking state detection unit detects that the hook unit is not locked to the locking target; A fall prevention warning device equipped with a fall prevention warning device.

2. 2. The fall prevention alarm device according to claim 1, The notification unit a notification selection unit that can select whether or not to issue a notification; The control unit A fall prevention alarm device in which, if the height from the reference surface detected by the height detection unit is equal to or greater than the first height and less than the second height set by the height setting unit, and if the notification selection unit has selected not to issue a notification, the notification unit does not issue a notification, and, if the height from the reference surface detected by the height detection unit is equal to or greater than the second height, the notification unit issues a notification even if the notification selection unit has selected not to issue a notification.

3. 3. The fall prevention alarm device according to claim 1, The height detection unit a reference air pressure detector that is installed on the reference surface and detects a reference air pressure; a current air pressure detector attached to the fall arrest device and detecting the air pressure at the height at which the device is attached; a height calculation unit that calculates the height of the fall arrest device relative to the reference surface based on the difference between the air pressure detected by the current air pressure detector and the reference air pressure detected by the reference air pressure detector; A fall prevention warning device equipped with:

4. 3. The fall prevention alarm device according to claim 1, a current air pressure detector attached to the fall prevention device and detecting the air pressure at the height at which the device is attached; The height detection unit When the current atmospheric pressure detected by the current atmospheric pressure detector becomes an atmospheric pressure corresponding to the preset first height, it is determined that the current atmospheric pressure is the first height; A fall prevention warning device that determines that the current air pressure is at the second height when it reaches an air pressure equivalent to the predetermined second height.

5. 3. The fall prevention alarm device according to claim 1, an information output unit that outputs information to the outside, The control unit A fall prevention alarm device that outputs notification information via the information output unit indicating that the notification has been made for longer than a predetermined time when the time the notification unit has been making the notification exceeds a predetermined time.

6. 6. The fall prevention alarm device according to claim 5, The control unit A fall prevention warning device that stores identification information defined for each fall prevention device and outputs the identification information together with the alarm information when outputting the alarm information.

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