JP7325735B2 - Construction site recording device - Google Patents

Description

The present invention relates to a recording device for a construction site, and in particular, when an abnormal situation such as vibration, noise, dust, random winding, concrete curing, weather, etc. The present invention relates to a recording device for a construction site, which responds by recording video for a predetermined period of time before and after the occurrence of an abnormality.

At construction sites such as construction work and civil engineering work, noise and ground vibrations associated with construction work are regulated by the Noise Regulation Law and the Vibration Regulation Law. In addition, some local governments have enacted environmental impact assessment ordinances to require prior prediction and assessment of the impact of development projects on the environment.

2. Description of the Related Art Conventionally, techniques disclosed in Patent Documents 1 and 2 are known as noise and vibration monitoring devices at construction sites such as construction work.
In the construction work noise and vibration monitoring method of Patent Document 1, a noise microphone and a vibration pickup are installed in relation to a site under construction, and the sound volume detected by the noise microphone and the vibration value detected by the vibration pickup are respectively set. It is a method of issuing an alarm when noise or vibration exceeding a set value is detected in comparison with a set value.

The noise/vibration monitoring disclosure device and the environment monitoring disclosure device of Patent Document 2 include a detection device containing noise detection means for detecting noise and vibration detection means for detecting vibration, and noise and vibration detection detected by the noise detection means. Equipped with a disclosure device that publicly displays the measured value of vibration detected by means, and a control device that controls each detection means and the disclosure device, and the disclosure device and the control device can be separated from each other. It is characterized by comprising communication means for communicating between the disclosure device and the control device.

JP-A-61-175528 Japanese Patent No. 2942186

A construction work noise and vibration monitoring method such as that disclosed in Patent Document 1 can monitor and issue an alarm for noise and vibration exceeding a certain value generated at a construction site. Since the circumstances leading up to the accident were not recorded on video, it was not easy to elucidate or investigate the cause. Useless.

As with Patent Document 1, the noise/vibration monitoring disclosure device and the environment monitoring disclosure device of Patent Document 2 do not record the process leading to the occurrence of noise or vibration exceeding a certain value, so the cause cannot be clarified. Or it is not easy to investigate, and it is not useful for appropriate preventive measures to prevent noise and vibration exceeding a certain value depending on the cause.
Moreover, the techniques of Patent Documents 1 and 2 can only detect vibration and noise abnormalities, and cannot detect other abnormal situations at construction sites, such as hoist abnormalities and concrete curing abnormalities. Even if recording is performed in response to the detection of noise or vibration exceeding a certain value using the techniques of Patent Documents 1 and 2, it is possible to record only the site situation after the occurrence of abnormal noise or vibration. Since the site situation before the occurrence was not recorded, it is not useful for investigating the cause of the anomaly.

The main object of the present invention is to automatically record and save images of a predetermined period of time before and after the occurrence of an abnormal situation in response to an abnormality detection mail sent when an abnormal situation is detected at a construction site, thereby enabling analysis of the abnormal situation. To provide a video recording device for a construction site, which is useful for investigation of a problem and cause.

Another object of the present invention is to automatically record and store video showing the state of a construction site within a predetermined time period before and after the occurrence of an abnormal situation in response to receipt of an abnormality detection mail for each cause of the abnormal situation. To provide a recording device for a construction site which is useful for investigation of each cause of an abnormal situation.

Another object of the present invention is to record the situation of a construction site together with the current time and monitor it at all times, automatically record images before and after the occurrence of an abnormal situation for an appropriate period of time, and find out the cause of an abnormal situation when an abnormal situation occurs. To provide a video recording device for a construction site, capable of quickly taking out video for a predetermined minimum necessary time for investigation, and useful for quickly taking appropriate countermeasures.

At least one abnormality in relation to the construction site recording device of the first invention (20 in Figs. A monitoring device (11) is installed. The abnormality monitoring device (11) is installed in relation to the construction site and detects one or more types of abnormal conditions (for example, noise, vibration, dust, random winding, concrete curing, weather, etc.). , is connected to the recording device at the construction site via a communication line or wired or wirelessly.
The construction site recording device includes cameras (26, 36) for monitoring the construction site, first storage units (23a, 33a), second storage units (23b, 33b), and recording control units (21a, 33b). 31a and S6), mail receiving units (28a, 38), storage control units (21b, 31a and S30), and output control units (22, 31a and S11 and S12).
The camera is installed at a location where the construction site can be monitored, faces the construction site, and constantly captures the situation of the construction site. The first storage unit has a storage capacity capable of recording video from the camera within a first fixed period of time. The second storage unit has a storage capacity capable of recording within a second fixed time that is shorter than the first fixed time. The recording control unit writes the video imaged by the camera to the first storage unit for recording , and after the predetermined recording time is exceeded, the new video overwrites the oldest video for recording.
Then, when an abnormal situation occurs at the construction site, the abnormality monitoring device transmits by e-mail the information on the time of occurrence of the abnormality according to the cause of the abnormal situation. The mail receiving unit receives an abnormality detection mail from the abnormality monitoring device. In response to this, the storage control unit determines the time at which the abnormality occurred based on the mail received by the mail receiving unit, and uses the time at which the abnormality occurred as a starting point to store the first data recorded in the first storage unit. video data for a predetermined period of time (for example, two minutes before and after the occurrence of the abnormality) is taken out (or extracted) from the recorded data for a predetermined period of time, and written in the second storage unit. to save images related to The output control unit outputs the recorded image related to the occurrence of the abnormality stored in at least the second storage unit based on the output instruction.

According to the first invention, by automatically recording and saving video for a predetermined period of time before and after the occurrence of an anomaly in response to an anomaly detection mail sent when an anomalous situation at a construction site is detected, it is possible to analyze an anomalous situation. A recording device at a construction site that is useful for investigating the cause can be obtained.

A recording apparatus for a construction site according to a second invention is the first invention, wherein the storage control unit includes an abnormality occurrence time determination unit (31a and S33 and S34). If the abnormality occurrence time information is recorded in the body of the email notifying the occurrence of an abnormality, the abnormality occurrence time determination unit recognizes the abnormality occurrence time based on the abnormality occurrence time information, and identifies the abnormality occurrence time in the body of the email. If the time information is not recorded, the transmission time recorded in the header of the mail is read to recognize the time when the abnormality occurred.
According to the second invention, it is possible to accurately know the time when an abnormality occurred based on the abnormality detection mail, and to save recorded images for a predetermined period of time before and after the occurrence of the abnormality.

A construction site recording device of a third invention includes a timer (21d, 31d) for generating current time information in the construction site recording device of the first or second invention. The recording control unit, when writing an image captured by the camera into the first storage unit , combines the current time information generated by the timer with the image as the recording time and causes the image to be recorded.
According to the third invention, when viewing recorded video for a predetermined period of time before and after the occurrence of an abnormality, the time at which the video was recorded is recorded in time with the recorded video, so that the occurrence of the abnormality can be known along with changes in time. It is possible to obtain very useful information for investigating the cause of an abnormality.

A construction site recording device according to a fourth aspect of the present invention is a construction site recording device according to any one of the first to third aspects of the invention, when the recording device at the construction site saves a video related to the occurrence of an abnormality by the storage control unit, the time at which the abnormality occurred is It further includes a storage time setting section (31a and S22 and S23) that arbitrarily sets a predetermined time before and after. The storage control unit writes the recorded video for an arbitrary predetermined time period set by the storage time setting unit to the second storage unit.
According to the fourth invention, it is possible to arbitrarily set the predetermined time before and after the occurrence of the abnormality, and to select the predetermined time according to the situation of the construction site.

A recording device for a construction site according to a fifth aspect of the invention is, in the first to fourth aspects of the invention, wherein a plurality of types of abnormality monitoring devices (11a to 11e) are installed corresponding to the cause of the abnormal situation, The type information of the abnormal situation is sent by e-mail. Then, the storage control unit (31a and S35 to S38) receives a mail with the same abnormal situation type information recorded in the mail received by the mail receiving unit within a preset interval period. , the cause of the occurrence of an abnormality is considered to be the same, and the mail is ignored, and the image related to the occurrence of the abnormality corresponding to the mail is not saved.
According to the fifth invention, it is possible to obtain a video recording apparatus that can accurately store recorded images for a predetermined time before and after the occurrence of an abnormality for each cause of an abnormal situation, and is extremely effective in investigating or elucidating the cause of each abnormality. .

According to a sixth aspect of the present invention, there is provided a construction site recording device according to any one of the first to fourth aspects, in which a plurality of types of abnormality monitoring devices are installed corresponding to the cause of the abnormal situation, Email the type information . The storage control unit (21a or 31a and S35 to S38) stores the type information when an e-mail with different abnormal situation type information recorded in the e-mail received by the e-mail receiving unit is received within the interval period. Execute the saving of the video related to the occurrence of the corresponding anomaly.
According to the sixth invention, it is possible to obtain a video recorder that can accurately store recorded images for a predetermined time before and after the occurrence of an abnormality for each cause of an abnormal situation, and that is extremely effective in investigating or elucidating the cause of each abnormality. .

A recording apparatus for a construction site according to a seventh aspect of the invention, in any one of the first to fifth aspects, comprises a third storage unit (23c, 33c) and a time-lapse image control unit (21c, 31c and S7 and S8). Prepare more. The third storage unit stores images from the camera as still images of a predetermined cycle. The time-lapse image control section extracts still images of a predetermined cycle (for example, one image every several seconds to several hundred seconds) from the camera video and sequentially writes them as time-lapse images in the third storage section.
According to the seventh invention, by storing a time-lapse image for a longer period of time together with the recorded video for the predetermined time before and after the occurrence of the abnormality, the recorded video for the predetermined time before and after the occurrence of the abnormality is not sufficient. Even if it is difficult to investigate, information that can be used to identify the cause of the abnormality can be obtained.

A construction site recording apparatus according to an eighth aspect of the invention further comprises an interval setting unit (31a and S26 and S27) for setting an extraction interval of time-lapse images in the seventh aspect. The time-lapse image control section extracts time-lapse images from the video captured by the camera based on the extraction interval set by the interval setting section, and sequentially writes them to the third storage section at a predetermined cycle.
According to the eighth invention, in addition to the same effect as the seventh invention, the extraction interval of time-lapse images can be freely selected.

A recording apparatus for a construction site according to a ninth aspect of the invention is, in any one of the first to seventh aspects, a display unit (24, 34) as an output means, an output terminal unit to which an external storage medium can be connected, and a communication device. At least one transmitting/receiving unit connected to a server via a line for transmitting/receiving data to/from the server is provided. Based on the output instruction, the output control unit outputs the recorded image related to the occurrence of the abnormality stored in the second storage unit to at least one of the display unit, the output terminal unit, and the transmission/reception unit.
According to the ninth invention, it is possible to select and output the recorded video or the time-lapse video in any output mode necessary for investigating the cause of the abnormality.

A recording apparatus for a construction site according to a tenth invention is the video data recording device for a predetermined time before and after the abnormality occurrence time stored in the second storage unit as the output information in the seventh invention. An output information designating section (31a and S4, S11, S12) for designating at least one of the time-lapse images stored in the section. The output control unit outputs video data for a predetermined time before and after the time when the abnormality occurred, which is stored in either the second storage unit or the third storage unit, according to the output information specified by the output information specifying unit. Or output a time-lapse image.
According to the tenth invention, any recorded video or time-lapse image specified by the user can be output.

According to the present invention, by automatically recording and saving images for a predetermined period of time before and after the occurrence of an anomaly in response to an anomaly detection e-mail sent when an anomaly is detected at a construction site, it is possible to analyze the occurrence of an anomaly and determine the cause of the anomaly. A construction site recording device useful for investigation is obtained.

Further, according to the present invention, in response to receiving an abnormality detection mail for each cause of occurrence of an abnormal situation, it is possible to automatically record and save video showing the state of the construction site within a predetermined period of time before and after the occurrence of each cause of abnormality, This can be useful for investigating the causes of abnormalities.

1 is a conceptual diagram of the overall configuration of a construction site recording system of the present invention; FIG. 1 is a functional block diagram showing the principle of a recording device for a construction site according to the present invention; FIG. 1 is a detailed block diagram of a recording device for a construction site according to one embodiment of the present invention; FIG. FIG. 4 is an illustrative view showing an example of a screen display for each mode in the embodiment of FIG. 3; 4 is a time chart for explaining the operation of the embodiment of FIG. 3; 4 is a flow chart for explaining the operation of a main routine in one embodiment of the present invention; 4 is a flow chart for explaining the operation of an input subroutine according to one embodiment of the present invention; 4 is a flow chart for explaining the operation of a subroutine of image extraction processing before and after occurrence of an abnormality according to one embodiment of the present invention; FIG. 4 is an illustrative view showing one example of an anomaly report mail by electronic mail in the embodiment of FIG. 3; FIG. 4 is a time chart for explaining interval control in the embodiment of FIG. 3; FIG.

FIG. 1 is a diagram conceptually showing the overall construction of the construction site recording system of the present invention. In FIG. 1, a construction site recording system 10 includes at least an abnormality monitoring device 11 for monitoring the construction site and a construction site recording device 20 . The abnormality monitoring device 11 includes an abnormality detection unit for detecting one or more types of abnormal conditions, and a transmission unit for transmitting an abnormality cause and occurrence time by e-mail when an abnormal condition is detected. The abnormality monitoring device 11 includes various abnormality detection units for detecting abnormalities such as vibration, noise, dust, random winding, concrete curing, etc., as examples of abnormal conditions at the construction site.
Various abnormal states detected by the abnormality monitoring device 11 are transmitted to the recording device 20 at the construction site via the server 12 or directly.

The video recording system 10 at the construction site may be provided with a server 12, a personal computer (hereinafter abbreviated as "PC") 13, a smart phone 14, etc., as required. The server 12 and the recording device 20 and/or the smartphone 14 are connected by wire or wirelessly, and are configured to be able to transmit and receive anomaly detection mail sent from the anomaly monitoring device 11 or recording information of the construction site.
The recording information of the construction site recorded by the recording device 20 is transmitted to the server 12 by wire or wirelessly, or is transferred to the personal computer 13 via the USB terminal mounted on the recording device 20 and an external cable, and is sent to the personal computer 13 as necessary. is written to the USB memory 15 connected to the USB terminal in response to the request.

FIG. 2 is a functional block diagram showing the principle of the construction site recording apparatus of the present invention. In FIG. 2, the abnormality monitoring device 11 includes abnormality monitoring devices 11a to 11e for detecting various abnormal conditions at the construction site. The abnormality monitoring device 11a includes a vibration detection section for detecting vibrations equal to or greater than a reference value and a mail transmission section. The abnormality monitoring device 11b includes a noise detection section for detecting noise exceeding a reference value and a mail transmission section. The anomaly monitoring device 11c includes a dust detection unit for detecting dust exceeding a reference value and an e-mail transmission unit. The abnormality monitoring device 11d includes a random winding detection section for detecting a random winding state that is not a prescribed winding state, and a mail transmission section. The abnormality monitoring device 11e includes a concrete curing detection section for detecting an abnormality in concrete curing that is not in a specified concrete state, and a mail transmission section.

Vibration, noise, and dust, which are examples of objects to be monitored for an abnormal state at a construction site, are abnormal causes that adversely affect the environment of residents living in the vicinity of the construction site. That is, the abnormality monitoring devices 11a, 11b, and 11c detect vibration, noise, and dust exceeding a reference value by means of an abnormality detection section such as a vibration detection section, noise detection section (or microphone), or dust detection section. One or more of these abnormality detection units are installed at positions or locations where vibration, noise, and dust are likely to occur.

On the other hand, abnormal winding and abnormal concrete curing do not adversely affect the environment, but they are abnormalities that lead to optimization of work at the construction site or deterioration of construction quality. That is, the irregular winding detection unit of the abnormality monitoring device 11d is provided in relation to the drum of the hoist (or winder) of the crane used at the construction site, and when the crane wire is wound on the drum, If the wire is not properly wound on the drum and is wound in a disordered manner (e.g., it cannot be wound in line according to a predetermined regularity), the desired length of wire cannot be wound on the drum. Since the original performance of the crane cannot be demonstrated, it is detected that the winding is disturbed.
In addition, the concrete curing detection unit of the abnormality monitoring device 11e detects that when concrete is poured at a construction site, if it is raining, the concrete cannot be placed evenly, and if the temperature and humidity exceed the appropriate temperature and humidity ranges, the concrete will be hardened. If the hardening speed is too fast or too slow, it will not be possible to cast concrete with the desired quality. Or, when the amount of rainfall exceeding a certain level is detected, an abnormality is notified.

The abnormal state monitored and detected by the above-described abnormality monitoring device 11 is merely an example, and various other abnormalities are conceivable depending on the type of construction work or construction status at the construction site. In that case, various detection units suitable for the abnormal state to be detected are used.

The recording device 20 at the construction site includes a recording control unit 21a, a storage control unit 21b, a timer 21d, an output control unit 22, a first storage unit 23a, a second storage unit 23b, a liquid crystal display or It includes a display unit 24 such as a plasma display, a camera 26, a mail reception unit 28a, and a video/image transmission unit 28b.
The first storage unit 23a has a relatively large storage capacity capable of storing, for example, about 20 to 60 minutes of video or video, and is controlled by the recording control unit 21a, and the construction site photographed by the camera 26. This video is recorded and stored at all times. The second storage unit 23b has a relatively small storage capacity capable of storing, for example, images or moving images of several minutes to several ten minutes. Among them, the image (moving image) of about several minutes before and after the occurrence of the abnormality generated by the storage control unit 21b is stored.
The timer 21d generates current time information and gives it to the recording control section 21a and the storage control section 21b, and generates a sampling timing signal (STS) at the timing at which still images for time lapse should be extracted and recorded for time lapse. (or still) is given to the image control unit 21c.

If necessary, the recording device 20 further includes a time-lapse image control section 21c and a third storage section 23c. The third storage unit 23c stores still images created or generated at predetermined intervals (or cycles) by the time-lapse image control unit 21c.

The recording control section 21a, the storage control section 21b, the time-lapse image control section 21c, and the output control section 22 described above are specifically configured by a central processing unit (CPU) and a program, and process or control in a time-division manner. be.
The first storage unit 23a, the second storage unit 23b, and the third storage unit 23c are, for example, random access memory (RAM), hard disk (HDD), or writable/readable nonvolatile memory (eg, SD memory or USB memory). ) is used. The timer 21d may clock the current time using an internal register of the CPU.
Also, the recording device 20 may be configured by using an information terminal device with a built-in camera 26 or an information terminal device to which an external camera 26 is electrically connected.

Next, referring to FIGS. 1 and 2, the principle operation of the construction site recording device 20 of the present invention will be described.
In a normal state where no abnormality has occurred at the construction site, none of the detection units of the abnormality monitoring devices 11a to 11e detects an abnormality, and each mail transmission unit does not send an abnormality detection mail.
In this normal state, the recording control unit 21a sequentially writes the images (moving images) sequentially captured by the camera 26 into the first storage unit 23a. Write control is performed by overwriting the area storing the oldest video. At this time, the recording control unit 21a also records (or overwrites) the current time input from the timer 21d in a partial area of the video captured by the camera 26. FIG. By superimposing the current time information on the video of the construction site and recording it, when the recorded video is viewed later, the time point of the video can be easily recognized.

Preferably, the time-lapse image control unit 21c is supplied with a still image sampling timing signal from the timer 21d in parallel with the video captured by the camera 26 being constantly recorded in the first storage unit 23a by the recording control unit 21a. Each time, a still image is extracted from the recording control section 21a and written in the third storage section 23c. As a result, still images sampled at regular intervals are sequentially accumulated in the third storage unit 23c.
The still images for a long period of time accumulated in the third storage unit 23c can be recognized as time-lapse images if viewed continuously in the order in which they were recorded. This time-lapse is also called an interval shooting video (time-lapse video), and is a shooting method in which still images shot at intervals of several seconds to several minutes are spliced together and displayed as a video. In other words, it can be seen as an image with dropped frames or an image with rough movement like an animation.

However, when some kind of abnormality occurs at the construction site, the detection unit corresponding to the type or cause of the abnormality among the abnormality monitoring devices 11a to 11e detects an abnormal state exceeding the reference value or regulation. In response to this, the mail transmission unit corresponding to the abnormality monitoring devices 11a to 11e that have detected the abnormal state transmits an abnormality detection mail describing the type (or type) of the abnormal state and the time of occurrence information, and records the construction site. Send directly to device 20 or via server 12 .
The content (email information) of this abnormality detection email is, for example, as shown in the upper right part of FIG. , information specifying the construction site, measurement point information, measurement result information, and the like.
By the way, when the number or types of abnormality monitoring devices (or the number of installation sites) for monitoring abnormal states is small, an email is sent directly from the email transmission unit of the abnormality monitoring devices 11a to 11e to the recording device 20 at the construction site. However, if the number and/or types of abnormality monitoring devices and/or the number of recording devices 20 are large, it is preferable to send the abnormality detection mail via the server 12 . This is because, if there are a large number of sites where anomaly monitoring devices are installed, the number of devices, or the number of types of anomaly monitoring devices, the server 12 analyzes the content of the anomaly detection mail and sends it to the appropriate recording device 20 at the construction site. , the processing load on other recording devices 20 can be reduced.

When an abnormality detection mail is transmitted from any of the abnormality monitoring devices 11a to 11e, the mail receiving section 28a included in the recording device 20 receives it, and the content of the abnormality detection mail is sent to the recording control section 21a and the storage control section. 21b. In response to this, the storage control unit 21b determines the time of occurrence of the abnormality from the date and time of transmission of the mail content, determines the type of the abnormality, and determines the type of the abnormality, and determines the time before and after the occurrence of the abnormality. 2 minutes) is given to the recording control unit 21a, and the recorded video (that is, duplicate video) for a predetermined time before and after the occurrence of the abnormality stored in the first storage unit 23a. is written in the second storage unit 23b.
By the way, at the time of the occurrence of an abnormality, recorded images for a predetermined period of time before the occurrence of the abnormality are already stored in the first storage unit 23a. are sequentially recorded in the storage unit 21a. Therefore, the storage control unit 21b captures (or extracts) the video recorded for a predetermined period of time before the occurrence of an abnormality stored in the first storage unit 23a and stores it in the second storage unit 23a immediately after receiving the abnormality detection mail. 23b, and after the recorded image for a predetermined time after the occurrence of the abnormality is written in the first storage unit 23a, the recorded image for the predetermined time after the occurrence of the abnormality is extracted and stored in the second storage unit 23b. control to write.
As a result, recorded images for a predetermined period of time before and after the occurrence of the abnormality (for example, recorded images for 2 minutes before the occurrence of the abnormality and recorded images for 2 minutes after the occurrence of the abnormality) are written to the second storage unit 23b. will be saved.

Also, preferably, when the storage control unit 21b receives the same type of abnormality detection mail while writing the recorded video for a predetermined time period before and after the occurrence of the abnormality in the second storage unit 23b, the preceding abnormality detection mail Priority is given to the operation of writing recorded images for a predetermined period of time before and after the occurrence of an abnormality in response to an abnormality detection mail to the second storage unit 23b, and recording images for a predetermined period of time before and after the occurrence of an abnormality corresponding to the subsequent abnormality detection mail are written to the second storage unit 23b. No write operation is performed to the second storage unit 23b. In other words, even if the same kind of anomaly detection mail is sent multiple times, it does not respond within a certain interval (that is, it ignores subsequent anomaly detection e-mails), and responds to different types of anomaly detection e-mails. Recorded images for a predetermined period of time before and after the occurrence are written in the second storage section 23b.
The reason for this is that when the same type of error detection mail is received multiple times in a short period of time, it is assumed that the cause of the occurrence of an error is the same, so that the amount of data in the second storage unit 23b is not wasted. This is to improve the efficiency of analysis by reducing recorded data of the same cause. Also, this is to prevent an error in which the write operation of the recorded video overflows if subsequent error detection mails are received frequently during the writing of the recorded video for a predetermined period of time before and after the occurrence of an error in response to the preceding error detection mail. .
If the types of abnormality detection mails that arrive consecutively within a predetermined period of time are different, recorded images for a predetermined period of time before and after the occurrence of each type of abnormality are written in the second storage unit 23b.

After the occurrence of the abnormal state, the observer on the server 12 (or center) side can view the images (moving images) recorded in the first storage unit 23a, the second storage unit 23b and/or the third storage unit 23c. Alternatively, it transmits to the recording device 20 information designating a video or image to be transmitted among the still images. When this instruction information is transmitted to the mail receiving unit 28a, the mail receiving unit 28a selects video/still images to be output to the recording control unit 21a, the storage control unit 21b, and/or the time-lapse image control unit 21c according to the instruction information. Along with designating the type, the output control unit 22 is instructed to output.

For example, when receiving information to instruct the server 12 to output recorded video for a predetermined time before and after the occurrence of an abnormality, the output control unit 22 gives an output instruction to the storage control unit 21b and the transmission unit 28b. In response to this, the storage control section 21b sequentially designates the read addresses from the first address to the last address of the second storage section 23b, reads the recorded video for a predetermined time before and after the read address, and supplies it to the transmission section 28b. The transmission unit 28b transmits the recorded video for the predetermined time before and after the recording to the server 12 .
When the recorded video stored in the first storage unit 21a is to be transmitted, the server 12 transmits information on the start time to be transmitted and the time to be transmitted (or the transmission end time). When this information is given from the mail reception section 28a to the output control section 22, the output control section 22 gives an output instruction to the recording control section 21a and the transmission section 28b. In response to this, the recording control section 21a sequentially designates the read addresses corresponding to the addresses from the designated start time to the transmission end time in the first storage section 23a, and reproduces the recorded video for the designated time. It reads out and gives it to the transmitting section 28b. The transmission unit 28b transmits the recorded video for the specified time to the server 12. FIG.

When transmitting the time-lapse image stored in the third storage unit 21c, the server 12 transmits information on the transmission start time and the transmission end time. When this information is given from the mail reception section 28a to the output control section 22, the output control section 22 gives an output instruction to the time-lapse image control section 21c and the transmission section 28b. In response to this, the time-lapse image control unit 21c sequentially designates the read addresses corresponding to the still images from the designated transmission start time to the transmission end time in the third storage unit 23c, and still images for the designated time. The image is read out and supplied to the transmission section 28b. The transmission unit 28b transmits still images for the specified time to the server 12. FIG.

On the other hand, when an administrator who is near the installation location of the recording device 20 learns of the occurrence of an abnormal condition and wants to view the recorded video, he or she manually operates the touch panel or the like to manually operate the touch panel or the like to specify the type of recorded video or still image to be output, and the type of video to be output. The destination (display unit 24 or server 12) is specified, and the time and duration to be output is specified as required.
For example, when an instruction to output recorded video for a predetermined time before and after the occurrence of an abnormality to the display section 24 is input, the output control section 22 gives an output instruction to the storage control section 21b and the display section 24 . In response to this, the storage control unit 21b sequentially designates the read addresses from the first address to the last address of the second storage unit 23b, reads the recorded video for a predetermined time before and after the readout address, and provides it to the display unit 24. Displayed on the display unit 24 .
Further, when an instruction to output still images for a predetermined time period before and after the occurrence of an abnormality to the display section 24 is input, the output control section 22 gives an output instruction to the time-lapse image control section 21c and the display section 24 . In response to this, the time-lapse image control unit 21c sequentially designates the read addresses of the addresses storing still images for a predetermined period of time before and after the time when the abnormality occurred in the third storage unit 23b. A still image is read out and supplied to the display section 24 to be displayed on the display section 24 .

FIG. 3 is a concrete block diagram of a recording device for a construction site according to one embodiment of the present invention.
A recording device 30 at a construction site is connected to the server 12 via a wired or wireless router 17 and an Internet network 18 or via the Internet network 18 .
Recording device 30 includes a processing unit 31 . The processing unit 31 includes a CPU 31a, an image processing unit 31b, a main memory 31c such as RAM or SRAM, and a timer 31d. The main memory 31c includes a storage area for temporarily storing various setting data set and input in an input/setting mode shown in FIG. A program memory 32 , a video/image memory 33 and a liquid crystal display 34 are also connected to the processing unit 31 .

The program memory 32 consists of a non-volatile memory such as ROM or flash memory, and stores a program for executing the flow shown in FIGS. 6 to 8, which will be described later.
The video/image memory 33 is composed of an SD memory or a hard disk (HDD) or the like, and includes storage areas 33a, 33b and 33c. The storage area 33a is used as a recorded image storage area for storing camera images taken by the camera 36. FIG. The storage area 33b is used as a storage image storage area for storing, for a plurality of times, recorded images for a predetermined period of time before and after the occurrence of an abnormality among the recorded images stored in the storage area 33a. The storage area 33c is used as a time-lapse image (or still image) storage area.

An input unit 35 such as a touch panel or a keyboard, a camera unit 36 , a USB terminal 37 , a mobile communication unit 38 and a LAN terminal 39 are connected to the processing unit 31 . When the input unit 35 is a touch panel, the touch panel is attached to the surface of the liquid crystal display 34 and inputs operation instructions according to touch operations.

Based on the program in the program memory 32, the CPU 31a executes processing shown in flowcharts of FIGS. generation), and performs information processing and communication control when communicating with the server 12 via the LAN 39 and router 17 .
The image processing unit 31b, under the control of the CPU 31a, stores recorded images stored in the storage area 33a, stored images of a predetermined time before and after the occurrence of an abnormality stored in the storage area 33b, or images stored in the storage area 33c. A time-lapse image is output and displayed on the liquid crystal display 34. - 特許庁

More specifically, the recording device 30 may be an information terminal device with a camera and a waterproof function. Also, the camera unit 36 may connect an external camera to the recording device 30 .

FIG. 4 is an illustrative view showing an example of screen display for each mode in the embodiment of FIG.
Specifically, FIG. 4(a) is a display example of the mode selection screen, and the mode of "input setting", "recording", and "output" is selected on the touch panel. FIG. 4(b) is a display example of the input/setting mode screen. A time information (or numerical value) input portion corresponding to , and a "Complete" button are displayed. Here, the predetermined time before and after the occurrence of the abnormality can be set in units of 30 seconds, for example, within the range of −30 minutes to +30 minutes. The interval (or mask) time can be set, for example, in units of 10 minutes within the range of 10 minutes to 60 minutes. The time-lapse interval is a still image sampling interval, and can be set, for example, in a range of 10 seconds to 1000 seconds. If you watch still images at set intervals continuously, you can recognize them as time-lapse images.

FIG. 4(c) is an example of a screen display in the recording mode. The left half of the screen displays an image of a construction site being recorded as a recording screen, while the right half of the screen displays the name of the site, the current time, and "ON/OFF" switch, etc. are displayed. The recorded video may be displayed in the size of the full screen of the display unit 24, and the site name and current time may be superimposed (or overwritten) on the recorded video.
FIG. 4D is a display example of a screen for selecting output information by manual operation. Displays an icon that instructs the start of output.

FIG. 5 is a time chart for explaining the operation in the embodiment of FIG.
In the example of FIG. 5, it is assumed that two minutes of recorded video constitute one file. FIG. 5(a) shows video data captured by the camera 36, and FIG. 5(b) shows recorded video data (for example, MP4 compressed data) written in the storage area 33a. FIG. 5(c) shows stored recorded data (non-compressed data) for a predetermined time (for example, 4 minutes×2) before and after the occurrence of an abnormality. FIG. 5(d) shows saved recording data (data obtained by compressing the saved data of FIG. 5(c) by MP4) for a predetermined time (for example, 8 minutes) before and after the occurrence of an abnormality written in the storage area 33b.

FIG. 6 is a flow chart for explaining the operation of the main routine in one embodiment of the present invention. FIG. 7 is a flow chart for explaining the operation of the input subroutine in one embodiment of the present invention.
Next, operations of the main routine and the input/setting process will be described with reference to FIGS. 6 and 7. FIG.

(Operation of input/setting)
When the power switch (not shown) is turned on to start the operation of the recording device 30, the CPU 32a executes a main routine and/or a subroutine based on a program stored in the memory 32. FIG. Here, the main routine is executed in synchronization with the frame cycle (once every 1/60th of a second or 1/30th of a second) in order to record the video captured by the camera 36 as a moving image.
First, in step 1, the mode selection screen shown in FIG. In step 2, it is determined whether or not the input/setting button has been operated. At step 3, it is determined whether or not the record button has been operated. At step 4, it is judged whether or not the output button has been operated. If it is determined in step 5 that there is no output instruction from the server 12, the process returns to step 2. FIG. Then, by repeating the operations from step 2 to step 5, it waits for any mode to be selected.
When the input/setting button is operated by the administrator while repeating the operations of steps 2 to 5 described above, it is determined in step 2 that the input/setting button has been operated, and the input/setting in step 20 is performed. Proceed to the setting processing subroutine.

In the input/setting process subroutine (see FIG. 7), at step 21, the input/setting mode screen shown in FIG. When the administrator sees this, he/she operates the setting button for "extraction (or extraction) time", "interval time" or "time lapse interval" and the time information (numerical value) input section corresponding to each button. After inputting all set times, the desired time is input for each item by operating the "Complete" button.
Here, the extraction (or extraction) time is a predetermined time before and after the occurrence of the abnormality, for example, an arbitrary time in the range of -30 minutes to +30 minutes from the recorded video stored in the storage area 33a. Enter the setting in units. This predetermined time (or extraction time) is selected as a time that is shorter than the maximum recordable time of the storage area 33a and is long enough to investigate the cause when one or more types of abnormalities occur.
The interval time is a time for securing a predetermined interval time when the same type of abnormality detection mail is received multiple times. This is because when the same type of error detection mail is received multiple times in a short period of time, it is assumed that the cause of the error occurrence is the same, so as not to waste the amount of data in the storage area 33b. This is to improve the efficiency of analysis by reducing the amount of recorded data. Also, if you receive anomaly detection emails multiple times and save the recorded video each time you respond to anomaly detection emails of the same type (cause), you will be able to save the recorded video for the specified amount of time after the occurrence of an anomaly according to the preceding anomaly detection email. This is to prevent an error in which the writing operation of the recorded video overflows if subsequent error detection mails are frequently received before the recorded video is stored in the storage area 33a.
The time-lapse interval is the sampling interval of still images, and can be set in the range of 10 seconds to 1000 seconds, for example.

If the extraction time setting operation is performed while the input/setting mode screen is being displayed, it is determined in step 22 that the extraction time has been input, and the process proceeds to the next step 23 . In step 23, after the set extraction time is written in the set data storage area (not shown) of the main memory 31c, the process returns to step 3 of the main routine.

Also, if the interval time setting operation is performed while the input/setting mode screen is being displayed, it is determined in step 22 that the extraction time is not set, and then the interval time setting input is performed in step 24. It is determined that it has been completed, and the process proceeds to the next step 25 . At step 25, after the set interval time is written in the setting data storage area of the main memory 31c, the process returns to step 3 of the main routine.

Further, when the time-lapse time setting operation is performed while the input/setting mode screen is being displayed, it is determined in step 22 that the extraction time is not set, and in step 24 it is determined that the interval time is not set. After that, it is determined in step 26 that the time lapse time setting input has been performed, and the process proceeds to step 27 . At step 27, after the set time-lapse time is written in the setting data storage area of the main memory 31c, the process returns to step 3 of the main routine.

If it is determined in step 26 that the time lapse time is not set, it is determined in step 28 whether or not other settings are being made. If it is other setting, in step 29, other set setting input processing (for example, writing data such as mail sender address setting, transfer data setting, etc. to the setting data storage area of the main memory 31c) is performed. After the completion button is operated, the setting input process is terminated and the process returns to step 3 of the main routine.

(Recording operation at a construction site)
After the input/setting process is completed, the process returns to the main routine (FIG. 6). If the record button is operated during execution of steps 1 to 5, it is determined in step 3 that the record button is ON (operated). Go to step 6. In step 6, the video data captured by the camera 36 is compressed and written in the recording storage area 33a. The recorded video at this time is, for example, as shown in FIG. ) is determined. If the set time-lapse time has elapsed, in step 8, a still image is extracted from the recorded video written in the recording storage area 33a at the current time at that time, and stored in the storage area 33c. Go to step 9. If the time-lapse time has not elapsed, the process proceeds directly to step 9.
In step 9, it is determined whether or not there is a trigger input by e-mail, that is, whether or not an anomaly detection e-mail has been sent from the server 12 because any of the anomaly monitoring devices 11a to 11e has detected an anomaly at the construction site. . If it is determined that there is no trigger input by mail, the process proceeds to step 4 and repeats steps 4, 5, 1-5 or steps 4, 5, 1-9.

During this repetitive operation, in step 6, the video data input from the camera 36 is converted into one file in units of two minutes (see FIG. 5(a)). 33a in file order (see FIG. 5(b)). By repeating this operation, when the recorded images corresponding to the storage capacity of the recording storage area 33a are written, the oldest recorded images are overwritten with the newest recorded images on a file-by-file basis.
For example, when the capacity of the storage area 32a is set to 1 hour in the input/setting mode shown in FIG. The oldest video is overwritten on file 1, the next recorded video is overwritten on file 2, and the oldest files are sequentially overwritten (storage by ring buffer method). The method of writing to the recording storage area 33a may be a first-in first-out method.

FIG. 8 is a flow chart for explaining the operation of the extraction processing subroutine before and after occurrence of an abnormality in one embodiment of the present invention.
Next, operations of the extraction processing subroutine before and after occurrence of an abnormality will be described with reference to FIGS. 6 and 8. FIG.
For example, in the input/setting mode of FIG. 4(b) described above, when the predetermined time before and after the occurrence of an abnormality is set to 4 minutes, the processing shown in the time charts of FIGS. From the recorded images stored in the storage area 32a, recorded images for a total of 8 minutes of a predetermined time (four minutes before and after) before and after the occurrence of the abnormality are extracted by the process described below and stored in the storage area 32b. will be

(Processing when an error detection email is received)
When the operations of steps 1 to 5 or steps 1 to 9 are repeated, any one of the abnormality monitoring devices 11a to 11e detects the occurrence of an abnormal state and sends an abnormality detection mail to the server 12. FIG. At this time, the abnormality detection mail sent from any one of the abnormality monitoring devices 11a to 11e has two types of mail texts shown in FIGS. 9(a) and 9(b). FIG. 9(a) shows an example in which information is contained in the body of the email, and the name of the construction site, the time when the abnormality occurred, and the cause of the abnormality are described in the body of the email. On the other hand, FIG. 9(b) is an example in which there is no information in the text of the email. The construction site and the cause of the abnormality are specified based on the information of the sender (From), and the time of occurrence of the error is specified by the date and time of transmission. It will be.
When the abnormality detection mail is sent, it is determined in step 9 that there has been a trigger input by the mail, and the process proceeds to step 30 for extracting recorded data before and after the abnormality (FIG. 8). It should be noted that the “trigger input by e-mail” here is not limited to the anomaly detection e-mail, and may be a trigger that is directly input to the recording device 30 .

In step 31, it is determined whether or not an anomaly detection mail has been received from any of the anomaly monitoring devices 11a to 11e. In step 32, it is determined whether or not information such as the time of occurrence of an abnormality is described in the text of the mail. When it is determined that information such as the time when an error occurred is described in the text of the email, in step 33, information about the time when the error occurred and the cause of the error (kind of the error state) described in the text of the email is obtained. be done. If it is determined that information such as the time when the error occurred is not described in the body of the mail, in step 34, the time when the error occurred is acquired from the transmission time described in the mail header, and the sender and/or subject Information on the cause of the abnormality is acquired from the
In this way, the time of occurrence of the abnormality and the cause of the abnormality are determined based on the abnormality detection mail. Then go to step 35 .

In step 35, whether or not the interval time set in the above-mentioned input/setting mode (see FIG. 4(b)) has passed since the time when the abnormality occurred (for example, twice the extraction time or a slightly longer time than twice). is determined. If it is determined that the interval time has passed, the process proceeds to the next step 36 . In step 36, recorded images of a predetermined period of time before and after the occurrence of the abnormality are extracted from the recorded image storage area 32a and written in the saved storage area 32b. That is, of the data stored in the recording storage area 32a, the recorded video for a predetermined period of time before and after the occurrence of the abnormality is duplicated in the storage storage area 32b.
For example, if an error detection email is received in the middle of file number 4 in FIG. Recorded images for a predetermined time (4 minutes) after the time of occurrence (4 minutes of file numbers 4 to 6) are extracted (see FIG. 5(c)), and a total of 8 minutes of recorded images are written in the storage area 32b. (See FIG. 5(d)).
After step 36, return to step 2 of the main routine.
As in this embodiment, the camera video is stored in the storage area 33a in units of files in step 6 described above, and in step 36 (or step 37, which will be described later), a file number containing a predetermined amount of time before and after the time when the abnormality occurred. Extract the recorded video of (file number 4 at the time of the abnormal occurrence and file numbers 2, 3 and 5, 6 before and after that), and select the predetermined time before and after the time of the abnormal occurrence from the file numbers 2 to 6 If processing is performed to extract (or take out) the recorded video, there is an advantage that the extraction processing can be performed efficiently and quickly.

As described above, by using the abnormality detection mail as a trigger input and storing the recorded video for a predetermined period of time before and after the abnormality occurrence time, even if the trigger input is sent to the recording device 30 slightly after the abnormality occurrence time, Since it is possible to recognize the time of occurrence of an abnormality described or recorded in the body of the email or the header of the email, there is an advantage in that it is possible to reliably extract recorded images for a predetermined period of time before and after the occurrence of the abnormality.
In the above description, when recording video for a predetermined period of time before and after the occurrence of an abnormality is stored, it is described that the recorded video is compressed and stored, but it goes without saying that the data may be stored without being compressed.

(Interval control when an error detection email is received multiple times)
By the way, the process of extracting recorded video for a predetermined period of time before and after the occurrence of an abnormality may be executed each time an abnormality detection mail is received. Control is preferred. The reason for this is as described in connection with the setting of "interval time" on the input/setting mode screen of FIG. 4(b).
FIG. 10 is a time chart for explaining interval control according to one embodiment of the present invention. Next, detailed operation of the interval control will be described with reference to FIGS. 8 and 10. FIG.

If it is determined in the above step 35 that the interval time has not elapsed, in the next step 37 it is determined whether or not the cause of the occurrence of the abnormality is of a different type. That is, when receiving an abnormality detection mail of the same type as the cause of the abnormality of the recorded image extracted from the storage area 33a and stored in the storage area 33b within a predetermined period of time before and after the occurrence of the abnormality in step 36, the interval time In addition, part of the recorded video storage process based on the preceding error detection email may be missing, so it is not the same type of error occurrence cause. Save processing is required only when
Therefore, if the cause (kind) of the occurrence of the abnormality is different, it is determined in step 37 and the process proceeds to the next step 38 . In step 38, recorded images for a predetermined time period due to a cause different from the cause of abnormality being processed in step 36 are extracted from the storage area 33a and written in the storage area 33b. On the other hand, if it is determined in step 37 that the cause of the abnormality is not of a different type (i.e., is of the same type), the step of the main routine is executed without saving the recorded image of the cause of the abnormality based on the subsequent abnormality detection e-mail. Go back to 2. Also, if it is determined in step 31 that no mail has been received from the abnormality monitoring devices 11a to 11e, the process returns to step 2 of the main routine.
In steps 35 to 36 and steps 37 to 38 described above, for the sake of simplification of explanation, cases in which the types of causes of the occurrence of abnormalities are different have been generically described. , noise, dust, random winding, and concrete curing), interval control equivalent to steps 35-36 (or steps 37-38) may be executed.

Next, a more specific example of interval control will be described with reference to FIG.
In FIG. 10, FIG. 10(a) shows the recording time (t on the horizontal axis) of the image taken by the camera 36, FIG. 10(b) shows the reception of the abnormal noise e-mail, and FIG. 10(c) shows the vibration FIG. 10(d) shows the case of receiving an error occurrence mail of random winding.
Then, it is judged whether it is within the interval time or not for each cause of the abnormality occurrence, and when the abnormality occurrence mail of the same cause (or type) is received within the interval time, the following processing based on the reception of the abnormality occurrence mail (Fig. 10 In the example of noise (b), the second and third noises) are regarded as invalid, and control is performed so that the recorded video is not saved.
On the other hand, even within the interval time, if the cause of the occurrence of an abnormality is different, for example, while saving the recorded video based on the occurrence of noise abnormality, an abnormality occurrence email based on another cause (vibration, random winding, etc.) is received. 10(c) or 10(d), it is recognized as a valid trigger input with a different cause of anomaly occurrence, and recorded video for a predetermined time before and after the occurrence of an anomaly for each cause is recorded. It is controlled so that it is extracted from the storage area 33a and stored in the storage area 33b.

As in this embodiment, if interval control is performed for each type of error occurrence cause, even if multiple error detection e-mails are received for the same cause, recording for a predetermined period of time before and after the occurrence of an error according to each succeeding e-mail can be performed. There is an advantage that the recorded video for a predetermined time before and after the occurrence of the abnormality specified in the preceding e-mail can be reliably stored in the storage area 33b without recording the video.
If the type of the cause of the occurrence of an abnormality is different, after saving the recorded video based on the different cause, the subsequent recorded video for a predetermined period of time before and after the occurrence of the abnormality based on the different type of cause is saved in the storage area 33b. There are advantages to be had. Therefore, even if there are many kinds of causes of anomalies, recorded images for each cause or type of anomalies can be reliably stored, and there is an advantage that extremely effective information or images can be obtained for investigating the causes of anomalies.

Then, by repeating the processing of the main routine in FIG. 6 and/or the processing of extraction and storage before and after the occurrence of an abnormality in FIG. saves recorded images for each cause when an anomaly detection email is received. A time-lapse image (still image) is also stored in the storage area 33c.

(Recorded video or time-lapse image output processing)
As described above, based on the abnormality detection mail, recorded images for a predetermined period of time before and after the occurrence of an abnormality are stored in the storage area 33b, and regardless of whether or not an abnormality has occurred, images captured by the camera 36 are recorded in the storage area 33a. In addition , in a state where the time-lapse image (or still image) is stored in the storage area 33c, the administrator who is near the recording device 30 or the administrator who is away from the recording device 30 can access any storage area. When the user wishes to view the recorded video or images stored in 33a to 33c, the following output processing is executed.

When the administrator who is near the recording device 30 wants to see the recorded video or the time-lapse image, he touches the touch panel, which is an example of the input unit 35 of the recording device 30 . In response, the CPU 31a starts the main routine. In step 1, a mode selection screen shown in FIG. 4(a) is displayed. At this time, the administrator touches the "output" button on the mode selection screen. In the next step 2, it is judged that the input/setting button has not been operated.

When it is determined in step 4 that the output button has been operated, in subsequent step 10, an output selection screen shown in FIG. 4(d) is displayed. The administrator looks at the icons (buttons) displayed on the output selection screen, selects the recorded video and/or the time-lapse image to be output, and then presses the "output" button. Accordingly, at step 11, the selected recorded video or time-lapse image is read from the corresponding storage area and displayed on the liquid crystal display 34. FIG. For example, when the recorded images before and after the occurrence of an abnormality are specified, the CPU 31a sequentially designates the read addresses of the storage area 33b to read the data of the recorded images before and after the occurrence of an abnormality for each cause stored in the storage area 33b. is read out and provided to the image processing unit 31b. The image processing unit 31b generates a camera image from the recorded image data before and after the occurrence of the abnormality, and causes the liquid crystal display 34 to display the camera image.
When the recorded video is selected, the CPU 31a sequentially designates the read addresses of the storage area 33a, thereby reading the data of the recorded video stored in the storage area 33a and causing the image processing unit 31b to read the data of the recorded video. It is displayed on the display 34 .
When the time-lapse image is selected, the CPU 31a sequentially designates the read addresses of the storage area 33c, thereby reading out the data of the time-lapse image stored in the storage area 33c, and displaying the data on the liquid crystal display by the image processing unit 31b. 34.

As an output mode of these recorded images or time-lapse images, they may be transmitted to the server 12 instead of or in conjunction with the display on the liquid crystal display 34 . In that case, the recording device 30 may display a screen for designating the output destination and allow the administrator to select it. Then, the CPU 31a converts the recorded video and/or time-lapse image data (bit-parallel data) read out from the storage areas 33a to 33c into serial data, provides it to the mobile communication unit 38 or the LAN 39/router 17, and distributes it to the Internet network. 18 to the server 12.

When the administrator who is away from the recording device 30 wants to see the recorded video or the time-lapse image, the server 12 designates the recorded video and/or the time-lapse image to be transmitted and sends the transmission instruction information to the desired recording device 30. Send to The mobile communication unit 38 or LAN 39 of the recording device 30 receives the transmission instruction information and gives it to the CPU 31a. The CPU 31a starts the main routine and sequentially executes steps 1-5. Then, in step 5, when it is determined that there is an output instruction from the server 12, the process proceeds to step 12. FIG. In step 12, as in step 11, the CPU 31a generates a read address of the storage areas 33a to 33c corresponding to the video or image to be transmitted and gives it to the corresponding storage area (one of 33a to 33c). , the recorded video (video recorded for a predetermined period of time before and after the occurrence of the abnormality or the video captured by the camera 36) and/or the data of the time-lapse image instructed to be transmitted are read from the corresponding storage areas 33a to 33c and transmitted to the server 12. be.
In this way, even at a place away from the recording device 30, it is possible to receive the recorded images for a predetermined period of time before and after the occurrence of the abnormality, and to investigate the cause of the occurrence of the abnormality. In addition, even if it is difficult to investigate the cause of an anomaly using only video recorded for a specified period of time before and after the occurrence of an anomaly, it is possible to investigate the cause even further by using time-lapse images taken even before the specified time before the anomaly. There are advantages that can help

By the way, various modes are conceivable for the output mode of step 11 or 12 described above. That is, in addition to the method of displaying on the liquid crystal display 34 and the method of transmitting to the server 12, the following method is also available.
For example, the USB memory 15, which is an example of an external storage medium, is connected to the USB terminal 37, which is an example of the output terminal unit mounted on the recording device 30, and the CPU 31a reads recorded video or time-lapse from any of the storage areas 33a to 33c. Image data may be written in the USB memory 15 . The administrator may remove the external storage medium from the recording device 30, connect it to the personal computer 13 at hand, and check it on the personal computer 13. FIG. Alternatively, the recording device 30 and the personal computer 13 or the smart phone 14 may be connected with a USB cable and checked on the personal computer 13 or the smart phone 14 .
In other words, the output mode of the recorded video or image of the recording device 30 is display on the liquid crystal display 34, which is an example of output means, transmission to the server 12, and writing to the USB memory 15 connected to the USB terminal 37. At least one of them may be output by a plurality of output means as required.
In addition, the output information includes not only the data of recorded images before and after occurrence of an abnormality by cause stored in the storage area 33b, but also the data of recorded images stored in the storage area 33a and the data of the recorded images stored in the storage area 33c. The stored time-lapse image data may be appropriately selected and output.

Next, the relationship between the storage capacity of each of the storage areas 33a to 33c of the video/image memory 33 in this embodiment, the recording time that can be stored, and the number of time-lapse images will be considered.
For example, if a 128 GB SD memory card is used as the memory 33, and the memory area 33a is about 60 GB, the memory area 33b is about 40 GB, and the memory area 33c is about 20 GB, then the recording time or the number of time-lapse images is as follows. can be saved.
The storage area 33a can record a maximum of 60 hours (2.5 days) if 1 GB is used for a 1-hour video using image compression technology in MP4 format for the camera video (recorded video) from the camera 36 . The storage area 33b can store 200 files of moving images, assuming that a 10-minute moving image uses 200 MB per file for a predetermined period of time before and after the occurrence of an abnormality. The storage area 33c can store about 2000 images when one screen (one image) of a still image is stored in 1 MB.

Next, the relationship between the time-lapse interval of the time-lapse images, the actual construction time, the number of recordings, the playback frame rate, and the playback time of the time-lapse images (that is, confirmation time) will be considered.
If the time-lapse interval of the time-lapse images is 10 seconds, the actual construction time is 10 hours (1 day) and the number of recorded sheets is 3600. If it is reproduced at a reproduction frame rate of 20 frames/second, it can be checked or reviewed in 3 minutes (180 seconds).
If the time-lapse interval of time-lapse images is 1 minute (60 seconds), the actual construction time is 10 hours×20 days (1 month), and the number of recorded sheets is 12,000. If it is reproduced at a reproduction frame rate of 20 frames/second, it can be checked or reviewed in 10 minutes (600 seconds).
If the time-lapse interval of time-lapse images is 10 minutes (600 seconds), the actual construction time is 10 hours×120 days (6 months), and the number of recorded sheets is 7200. If it is played back at a playback frame rate of 20 frames/second, it can be checked or reviewed in 6 minutes (360 seconds).

Next, we consider the characteristics of using email as a trigger for anomaly detection.
When the abnormality detection signals from the various detection units of the abnormality monitoring device 11 (or 11a to 11e) are directly supplied to the recording device 30 for recording, it is possible to detect that the same type of detection unit has supplied the abnormality detection signals a plurality of times. As a trigger, if the recording device 30 starts recording in an abnormal state each time, there may be a case where it is not possible to appropriately record (or save) the recorded video for a predetermined time after the occurrence of the abnormality. In other words, when abnormality detection signals are received from a plurality of types of detectors at the same time, there is a possibility that processing overflows and recording of a necessary part cannot be performed.
On the other hand, as in the embodiment of the present application, the storage area 33a (the first storage unit 23a in FIG. 2) for continuously recording camera images and the recorded images for a predetermined period of time before and after the occurrence of an abnormality are selectively stored. In addition, the reception of the anomaly detection mail is used as a trigger to store recorded images of a predetermined time before and after the occurrence of an anomaly from the storage area 33a. By extracting and storing in the storage area 33b, it is possible to appropriately and automatically record or store recorded images for a predetermined period of time before and after the occurrence of the abnormality.
Also, if an anomaly detection email is used as a trigger, there is a demerit that there is a delay from the anomaly detection time to the time the email is received. There is an advantage that the trigger can be applied without
Also, in the method using the error detection mail as a trigger, since the mail is sent via the Internet line, there is a delay from when the mail is sent at the time when the error is detected until it is received by the recording device 30. Since the information on the cause (type) of the occurrence of the abnormality and the information on the time of occurrence of the abnormality are included as the information, the data of the recorded video for a predetermined time before and after the time of the occurrence of the abnormality is stored in the storage area 33a (first storage section 23a). , and the duplicate is written in the storage area 33b (the second storage unit 23b), it is possible to reliably and automatically save the recorded video for a predetermined time before and after the time when the abnormality occurred. can. As a result, the demerit caused by the delay of the mail is eliminated. Moreover, by using the cause (type) information of the occurrence of the abnormality, the interval control can be performed for each cause of the abnormality.
If the recording device 30 is configured using only the storage area 33b having a large storage capacity (the storage area 33a is not used), the abnormality detection signal from the abnormality monitoring device 11 is sent by e-mail to the recording device 30. Even if it is, it is impossible to record only the state after receiving the abnormality detection signal (that is, the state of the predetermined time before receiving the abnormality detection signal cannot be recorded), and it is impossible to investigate the cause of the abnormality occurrence. Needless to say.

According to the present invention, an abnormality detection mail is sent from an abnormality monitoring device when various abnormalities occur in construction work, civil engineering work, or the like. Since the data is saved as a recording device, it is possible to automatically collect information that is useful for analysis and investigation of the cause of anomalies.

10; construction site recording system 11, 11a to 11e; abnormality monitoring device 12; server 20, 30; construction site recording device 21a; output control units 23a to 23c; first to third storage units 24; display unit 31; processing unit 31a; CPU
31b; image processing unit 31c; main memory 32; program memory 33;
34; Liquid crystal display 35; Input unit 37; USB terminal 38; Mobile communication unit 39;

Claims (10)

Abnormal situations at a construction site by photographing and recording the situation at a construction site where an abnormality monitoring device is installed that sends information on the time of occurrence of an abnormality by e-mail according to the cause of the abnormality when an abnormality occurs. A construction site recording device for reproducible
A camera installed facing the construction site at a location where the construction site can be monitored, and constantly capturing the situation of the construction site;
a first storage unit having a storage capacity capable of recording video from the camera within a first fixed time;
a second storage unit having a storage capacity capable of recording within a second fixed time shorter than the first fixed time;
The image captured by the camera is written to the first storage unit and recorded, and after the recording time of the first fixed time is exceeded, the new image overwrites the oldest image storage area and is recorded. the recording control unit,
an e-mail receiving unit for receiving an e-mail notifying the occurrence of an anomaly from the anomaly monitoring device;
Based on the mail received by the mail receiving unit, the time at the time of occurrence of the abnormality is determined, and starting from the time of the abnormality occurrence, among the recorded data of the first fixed time recorded in the first storage unit a storage control unit for storing video data related to the occurrence of an abnormality by extracting video data for a predetermined period of time before and after the occurrence of the abnormality from the storage unit and writing the video data to the second storage unit; A recording device for a construction site, comprising an output control unit for outputting a recorded image related to the occurrence of an abnormality stored in a second storage unit . The storage control unit includes an abnormality occurrence time determination unit,
The abnormality occurrence time determination unit recognizes the abnormality occurrence time based on the abnormality occurrence time information when the abnormality occurrence time information is recorded in the body of the email notifying the occurrence of the abnormality. 2. A video recording apparatus for a construction site according to claim 1, wherein when the occurrence time information is not recorded, the transmission time recorded in the header of the mail is read to identify the time when the abnormality occurred. The recording control unit includes a timer that generates current time information, and when writing the video captured by the camera into the first storage unit , the recording control unit uses the current time information generated by the timer as the recording time. 3. The video recording device for a construction site according to claim 1, wherein the video is synthesized with the video and recorded. The construction site recording device further comprises a storage time setting unit that arbitrarily sets a predetermined time before and after the occurrence of the abnormality when the storage control unit saves the video related to the occurrence of the abnormality,
4. The storage control unit according to any one of claims 1 to 3, wherein the storage control unit writes video for an arbitrary predetermined time period set by the storage time setting unit to the second storage unit. construction site recording equipment. The abnormality monitoring device is installed in a plurality of types corresponding to the cause of the abnormality, and sends information on the type of abnormality by e-mail together with information on the time of abnormality occurrence,
The storage control unit ignores the email when the same email with the type information of the abnormal situation recorded in the email received by the email receiving unit is received within a preset interval period. 5. The video recording apparatus for a construction site according to claim 1, wherein the image related to the occurrence is not saved. The abnormality monitoring device is installed in a plurality of types corresponding to the cause of the abnormality, and sends information on the type of abnormality by e-mail together with information on the time of abnormality occurrence,
When an e-mail with different type information of an abnormal situation recorded in the e-mail received by the e-mail receiving unit is received within the interval period, the storage control unit stores a video related to the occurrence of an abnormality corresponding to the type information . 5. The recording apparatus for a construction site according to claim 1, wherein the storage of the video data is executed. The recording device at the construction site further includes a third storage unit that stores images from the camera as still images of a predetermined cycle;
6. A time-lapse image control unit for extracting still images of a predetermined cycle from the video from the camera and sequentially writing them as time-lapse images in the third storage unit. The construction site recording device according to . The construction site recording device further includes an interval setting unit that sets an extraction interval of the time-lapse images,
The time-lapse image control unit extracts time-lapse images from the video captured by the camera based on the extraction interval set by the interval setting unit, and sequentially writes them to the third storage unit at a predetermined cycle. 8. The construction site video recorder according to claim 7, characterized by: The construction site recording device includes at least one of a display unit, an output terminal unit to which an external storage medium can be connected, and a transmission/reception unit that is connected to a server via a communication line and transmits/receives data to/from the server as output means. prepared,
The output control unit outputs the recorded image related to the occurrence of the abnormality stored in the second storage unit to at least one of the display unit, the output terminal unit, and the transmission/reception unit based on the output instruction. 9. The construction site recording device according to any one of claims 1 to 8. The recording device at the construction site outputs, as output information, video data for a predetermined time before and after the occurrence of the abnormality stored in the second storage unit and time-lapse images stored in the third storage unit. including an output information specification part that specifies at least one,
The output control unit controls output information for a predetermined period of time before and after the occurrence of an abnormality stored in either the second storage unit or the third storage unit according to the output information specified by the output information specifying unit. 8. The video recording device for a construction site according to claim 7, wherein the video data or the time-lapse image is output.