JP5333477B2 - Field work support system, apparatus, method and program - Google Patents

Description

  The present invention relates to a field work support system, a field work support apparatus, a field work support method, and a field work support program that support field work.

  In plant facility maintenance work, a gas detector may be detected by installing a portable gas detector or a fixed sensor at the work site. As a notification method in the case of detection, there are, for example, a method of displaying a numerical value of gas concentration on a liquid crystal monitor, flashing a warning lamp, a buzzer sound or vibration.

  As a technique for determining the direction of the gas generation source, for example, in Patent Document 1, gas concentration distribution is measured by performing simultaneous multipoint measurement using a portable sensor array in which a large number of gas sensors are arranged, A method for searching the source direction is described.

  Patent Document 2 describes a method of determining the direction of a source by measuring the direction of gas flow and moving the main body with a detection system that combines an autonomously moving wind direction sensor and a gas sensor. . Patent Document 3 describes a method in which an autonomous mobile body equipped with a gas sensor rotates the sensor 360 degrees in the horizontal direction and determines the direction of the rotation angle at which the sensor output shows the maximum value as the direction of the source. ing.

  Further, in Patent Document 4, based on information obtained via a wireless LAN, when a worker enters a prohibited entry area, the monitoring server monitors the GPS information and determines that a safety problem has occurred. The technology to display the warning message is described. Patent Document 5 describes a technique for automatically creating a map of contaminant levels when one or more people wearing sensors move around.

Japanese Patent No. 3101712 Japanese Patent No. 3443995 Japanese Patent No. 3620886 JP 2002-287846 A JP 2003-516831 A

  However, if sensors are installed at various locations in the work area, there is a problem that costs increase. In the numerical data display, it is difficult to determine whether or not to continue the work unless each worker knows the meaning of the numerical value. In addition, it may be difficult to notice depending on the surrounding environmental conditions only by a warning lamp, a buzzer warning sound, or a notification by vibration.

  The measurement method based on the sensor array method described in Patent Document 1 requires a means for visualizing a change in density, and there is a problem that the construction of the system becomes complicated. In addition, the method described in Patent Document 2 has a problem that there is no means for instructing a worker to transmit a result detected by a moving body such as a robot to an operator. In addition, the method described in Patent Document 3 requires time to measure and rotate 360 degrees while moving the gas flow direction, so that it is difficult to apply in the field where urgency is required. .

  Further, according to the method described in Patent Document 4, it is determined that a safety problem has occurred when the worker enters the restricted entry area, and a warning message is displayed. It is not possible to determine which is dangerous to move to other than returning to the original.

  Moreover, since the method described in Patent Document 5 is for automatically generating a contaminant level map, it is very time-consuming. For this reason, it is impossible to quickly know the situation of the work area, and it cannot be applied to a site where urgency is required.

  Therefore, the present invention provides a field work support system, a field work support apparatus, a field work support method, and a field work support that can show necessary information to workers at a site where urgency is required without incurring a significant operational cost. The purpose is to provide a program.

The field work support system according to the present invention includes a gas concentration detection means for detecting a gas concentration at a work site, a gas concentration at a first position that is a position where an instruction to start work is given, and a first position. When the worker has moved in the first specific direction, the worker has changed the gas concentration at the second position, which is the worker's position after moving a predetermined distance or after a predetermined time has passed, and the second position. Information in which the magnitude relationship of the gas concentration at the third position, which is the position of the operator after a predetermined distance of movement or a predetermined time has elapsed when moving in a specific direction, is associated with the gas generation direction in advance. The direction corresponding to the magnitude relationship between the gas concentration at the first position, the gas concentration at the second position, and the gas concentration at the third position, which is stored and detected by the gas concentration detection means, is used as the information. by identifying based, A generating direction specifying means for specifying a generating direction of the scan, characterized in that the generating direction of the gas occurs direction specifying means is identified and a display control means for displaying on the head-mounted display device.

The field work support device according to the present invention has a gas concentration at a first position, which is a position where a work start instruction is given, and a predetermined distance when an operator moves in a first specific direction from the first position. The concentration of gas at the second position, which is the position of the worker after the movement or after a lapse of a predetermined time, and a predetermined distance after the worker moves in the second specific direction from the second position or after the predetermined Information that correlates the magnitude relationship of the gas concentration at the third position, which is the position of the operator after the passage of time, and the gas generation direction is stored in advance, and the gas concentration detected at the first position; The generation direction for specifying the gas generation direction by specifying the direction corresponding to the magnitude relationship between the gas concentration detected at the second position and the gas concentration detected at the third position based on the information. Identification means and generation direction identification means Characterized by comprising a display control means for displaying the boss was generating direction in the head-mounted display device.

In the field work support method according to the present invention, the generation direction specifying means has the gas concentration at the first position, which is the position where the work start instruction is given, and the operator moves from the first position in the first specific direction. The gas concentration at the second position, which is the position of the worker after a predetermined distance or a predetermined time after moving, and the case where the worker moves in the second specific direction from the second position Information that correlates the magnitude relationship of the gas concentration at the third position, which is the position of the operator after a predetermined distance of movement or a predetermined time has elapsed, and the gas generation direction are stored in advance, and the gas concentration detection means includes: The gas concentration at the first position of the work site , the gas concentration at the second position, and the gas concentration at the third position are detected, and the generation direction specifying means detects the gas concentration detected by the gas concentration detecting means. Concentration of gas at position 1 and gas at position 2 By identifying based degrees and a third direction corresponding to a magnitude relation between the concentration of the gas at the position on the information, so that identifying a direction of a generated gas, and displays the identified generating direction in the head-mounted display device It is characterized by controlling to.

The on-site work support program according to the present invention is the case where the gas concentration at the first position, which is the position where the work start instruction is given to the computer, and when the worker moves in the first specific direction from the first position. The gas concentration at the second position, which is the position of the operator after the predetermined distance movement or the elapse of the predetermined time, and the predetermined distance movement when the worker moves in the second specific direction from the second position. Information that correlates the magnitude relationship of the gas concentration at the third position, which is the position of the operator after or after the passage of a predetermined time, and the gas generation direction is stored in advance, and the gas detected at the first position The direction of gas generation is specified by specifying the direction corresponding to the magnitude relationship between the concentration of the gas detected at the second position, the concentration of the gas detected at the second position, and the concentration of the gas detected at the third position based on the information. Processing to identify the direction of occurrence , Characterized in that to execute a display control process for controlling so as to display the specified generating direction in the head-mounted display device.

  ADVANTAGE OF THE INVENTION According to this invention, information required for an operator can be shown on the spot where urgency is calculated | required, without spending operation cost so much.

It is a block diagram which shows an example of a structure of the field work assistance system by this invention. It is explanatory drawing which shows an example of the information which shows the plane position to which an operator moves. It is a flowchart which shows the process example which a field work support system performs. It is explanatory drawing which shows an example of matching with a density fluctuation pattern and a generation source direction. It is explanatory drawing which shows the example of determination of the generation source direction by gas concentration fluctuation amount. It is explanatory drawing which shows the example of determination of the generation source direction by gas concentration fluctuation amount. It is explanatory drawing which shows a work image and the example of a display in a head mounted display apparatus. It is a block diagram which shows the minimum structural example of a field work support system.

  In order to prevent accidents caused by gas explosions and gas poisoning, fixed sensors are installed on portable gas detectors and work sites in gas companies, factories, construction sites, and plant facilities. There are methods that can detect gas leaks, display numerical values of gas concentration on a liquid crystal monitor, blink a warning lamp, and notify by buzzer sound or vibration. Especially in the case of colorless and odorless gas, and at night and in the dark, it is indispensable to detect and monitor dangerous situations that cannot be detected by humans using gas sensors.

  However, installing sensors at various locations in the work area has the problem of increased installation costs and operational costs for monitoring, and even if numerical data is displayed on a liquid crystal monitor, the numerical effects mean to human effects and toxicity It is difficult to determine the continuation of the work as to how to act without knowing the influence of such as. It may be difficult to notice depending on operating conditions such as warning lamps, buzzer warning sounds, and vibrations that can only be used for emergency situations. In order to improve these, this embodiment makes it possible to apply work instructions in a timely manner, even in a hands-free state during work in a proper place, even if the person is not very familiar with the work, without incurring a significant operational cost. . Specifically, a gas sensor and a wearable computer are attached and a change in the gas concentration is detected by moving within a certain range, and toxic gas, particularly monoxide, is added to the head-mounted display device of the operator according to the orientation information obtained from the geomagnetic sensor. Display the direction of carbon sources, cautions and warnings in an easy-to-understand manner.

  Even in noisy or dark places, the generation status of colorless, odorless and tasteless carbon monoxide gas is visualized, and the gas generation status and work instructions are displayed on the head-mounted display device so that the operator can notice the gas generation. Not only numerical values of concentration, numerical data of azimuth / time information, but also information that you want to know can be transmitted quickly.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of a field work support system according to the present invention.

  The field work support system in the present embodiment detects the gas concentration at a certain point, and calculates the amount of variation between the detected gas concentration and the gas concentration measured at a point where the worker has moved a predetermined distance in a predetermined direction. Determine the direction of gas generation based on the amount of fluctuation. Then, the field work support system performs control so that the identified source direction and the orientation of the worker detected by the geomagnetic sensor are displayed superimposed on the head mounted display device.

  The head mounted display device used in the present embodiment may be, for example, a glasses type or a helmet type as long as it can be mounted on the head. Further, for example, the head-mounted display device may be a system that projects an image on the retina or an optical system that uses a half mirror. Further, for example, a type of projecting an external image taken by a camera instead of directly viewing the outside may be used. In the present embodiment, in accordance with general usage, glasses-type, helmet-type, retinal irradiation-type, optical-type, and the like are collectively referred to as a head-mounted display device.

  As shown in FIG. 1, the field work support system includes a gas concentration detection unit 10, a data output unit 11, an information input unit 12, a fluctuation amount measurement unit 13, a source direction determination unit 14, a geomagnetism detection unit 15, and a worker direction. An output unit 16, an image processing unit 17, and an image display unit 18 are included. In this embodiment, the information input unit 12, the fluctuation amount measurement unit 13, the source direction determination unit 14, the geomagnetism detection unit 15, the worker direction output unit 16, and the image processing unit 17 are included in a wearable computer (not shown). It is.

  The gas concentration detector 10 has a function of measuring the gas concentration. Specifically, the gas concentration detection unit 10 is realized by a sensor capable of measuring a gas concentration.

  The data output unit 11 has a transmission function for transmitting gas concentration data indicating the measured gas concentration to the wearable computer. For example, the data output unit 11 automatically transmits the gas concentration data in accordance with the operator's operation or every predetermined period. For example, the gas concentration data detected by the gas concentration detector 10 is temporarily stored as log data, and the log data of the gas concentration data stored at a predetermined timing is transmitted.

  In the present embodiment, it is assumed that the gas concentration detection unit 10 and the data output unit 11 are housed in the same device as a gas sensor. In addition, this device has a structure that can be easily attached to clothes and equipment, and is fixed to a part of the body when the worker moves. Specifically, in the present embodiment, this device is fixed to a helmet worn by an operator.

  The information input unit 12 has a function of receiving log data of gas concentration data transmitted by the data output unit 11 with a wearable computer. The data output unit 11 and the information input unit 12 can communicate with each other via a wireless line or a wired line. The information input unit 12 outputs the received log data to the fluctuation amount measurement unit 13 and the image processing unit 17.

  The fluctuation amount measuring unit 13 compares the gas concentration data of each point measured by the gas sensor (gas concentration detecting unit 10) worn by the worker who has moved from three points, and measures the change amount of the gas concentration. It has a function. Specifically, the variation measuring unit 13 is realized by a CPU of an information processing apparatus that operates according to a program. In the present embodiment, an example of processing for comparing gas concentration data at three points will be described. However, the present invention is not limited to this. For example, gas concentration data at four or more points may be compared.

  The source direction determination unit 14 increases or decreases the gas concentration based on the fluctuation amount obtained by the fluctuation amount measurement unit 13 comparing the gas concentration data at each point and the concentration fluctuation pattern stored in advance. And the direction from the current location toward the point where the gas concentration is high is determined as the source direction. Specifically, the source direction determination unit 14 is realized by a CPU of an information processing device that operates according to a program.

  The geomagnetism detection unit 15 is mounted on a wearable computer and has a function of measuring an azimuth. Specifically, the geomagnetism detecting unit 15 is realized by a geomagnetic sensor.

  The worker direction output unit 16 has a function of specifying the direction in which the worker is facing from the result measured by the geomagnetism detection unit 15 as the worker direction and outputting the direction to the image processing unit 17.

  The image processing unit 17 has a function of superimposing information indicating the source direction determined by the source direction determination unit 14 on an image indicating the worker direction specified by the worker direction output unit 16. The image processing unit 17 has a function of digitizing the gas concentration data received by the information input unit 12 and superimposing the numerical value on the image. The image processing unit 17 has a function of outputting the superimposed image to the image display unit 18 for display. Specifically, the image processing unit 17 is realized by a CPU of an information processing apparatus that operates according to a program.

  The image display unit 18 has a function of displaying an image processed by the image processing unit 17. The image display unit 18 is realized, for example, by a head-mounted display device that is mounted and fixed near the head so that the operator can confirm the orientation and source direction of the operator while moving.

  The image display unit 18 can display, for example, time information indicating an elapsed time from the start of gas concentration measurement and a measured value of gas concentration. Further, for example, the image display unit 18 can display information on warnings and cautions for workers as business instructions based on the source direction and gas concentration data.

  Next, the operation of the field work support system will be described. Here, referring to FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG. 7, when an operator who has a gas sensor and a geomagnetic sensor moves within a predetermined range, The operation of detecting the concentration, analyzing the positional information and the variation of the gas concentration, determining the direction of the generation source, and displaying the direction of the generation source and the work instruction on the head mounted display device will be described.

  In the present embodiment, the position information is information that can specify a point on the two-dimensional coordinates managed by the wearable computer. Specifically, the actual point X at which the measurement is started is set as the origin on the coordinates, and a predetermined distance (within 10 m) from the point X toward the movement direction of the worker (for example, the north direction specified by the geomagnetic sensor). Alternatively, a point on the coordinates representing the point Y moved for a specific time (for example, within 10 seconds) is set as the position information of the point Y. Here, for example, the distance and direction to be moved in advance (that is, the point Y) are determined, and the worker moves the distance determined in the determined direction. Further, for example, the movement speed of the worker is obtained in advance, and the position information of the point Y is obtained based on the movement distance that can be obtained from the movement speed and the elapsed time and the worker direction detected by the geomagnetic sensor. Further, for example, the position information of each point may be obtained from the movement direction of the worker and the elapsed time using coordinates representing time.

  Further, if the point where the worker has moved the same distance or the same time as the point X−the point Y in the direction rotated 90 degrees at the point Y is the point Z where the measurement is finished, the point on the coordinates representing the point Z is the point Z position information. In this embodiment, the point where the second gas concentration measurement is performed is the point Y, and the point where the third gas concentration measurement is performed is the point Z. As described above, the wearable computer obtains and stores the position information of each point after the operation is started.

  First, referring to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the direction of the gas generation source is determined from the detected fluctuation amount of the gas concentration, and the direction of the generation source is displayed on the head-mounted display device according to the operator direction. The operation to be performed will be described.

  FIG. 2 is an explanatory diagram illustrating an example of plane position information on which an operator moves. First, the worker confirms the measured value a (ppm) of the gas concentration while viewing the azimuth information (for example, the worker direction) displayed on the head mounted display device at the point X shown in FIG.

  Next, the worker moves from the azimuth information to a point Y that goes straight for 10 seconds in the north direction (N direction). Here, the gas concentration detector 10 of the gas sensor measures the gas concentration b (ppm) in accordance with the operation of the operator or automatically.

  Next, the worker changes the direction to the east direction (E direction) rotated 90 degrees clockwise, and then moves to a point Z that has gone straight for 10 seconds. And the gas concentration detection part 10 of a gas sensor measures gas concentration c (ppm) according to an operator's operation or automatically.

  In the field work support system, control is performed so that orientation information including the worker direction measured by the geomagnetic sensor is always displayed on the head mounted display device. Therefore, the worker can recognize in which direction he / she is moving. In the field work support system, the gas concentration is measured every predetermined period, and the measurement result is controlled to be displayed on the head mounted display device each time. Here, it is assumed that the gas concentration is measured every 5 seconds by a gas sensor and the measurement result is controlled to be displayed on the head mounted display device.

  FIG. 3 is a flowchart showing an example of processing executed by the field work support system. The operator selects a work start button displayed on the head mounted display device by operating the wearable computer. Then, the gas concentration detection part 10 of the gas sensor mounted on the helmet worn by the operator measures the gas concentration a at the point X (step S1).

  Next, the data output unit 11 transmits log data including the gas concentration a detected by the gas concentration detection unit 10 at the point X to the information input unit 12 of the wearable computer.

  Further, the geomagnetism detection unit 15 of the geomagnetic sensor mounted on the wearable computer detects the position information of the point X (that is, the origin on the two-dimensional coordinates), and the direction information and information obtained from the worker direction output unit 16. The gas concentration information from the input unit 12 is read by the image processing unit 17 and displayed on the head mounted display device which is the image display unit 18.

  Specifically, the worker direction output unit 16 specifies the worker direction based on the azimuth measured by the geomagnetism detection unit 15 and outputs azimuth information including the specified worker direction to the image processing unit 17. Further, the information input unit 12 outputs the gas concentration information including the received gas concentration a to the image processing unit 17. Then, the image processing unit 17 performs control so that the gas concentration information is superimposed on the image indicating the azimuth information and displayed on the image display unit 18.

  The operator adjusts the posture so that the north (N) direction is at the top of the screen while looking at the azimuth information at the point X, and confirms the measured value a of the gas concentration. When the worker presses the measurement start button of the wearable computer and moves in the N direction, the field work support system starts counting with the time display on the screen. Then, the gas concentration detection unit 10 of the gas sensor measures the gas concentration b at a point Y where the operator has moved after a predetermined time (10 seconds in the present embodiment) (step S2). As described above, the gas concentration detection unit 10 measures the gas concentration every predetermined period or according to the operator's operation. In addition, the wearable computer specifies position information of the point Y in the two-dimensional coordinates, for example, when measuring the gas concentration b.

  Next, the fluctuation amount measuring unit 13 compares the gas concentration b at the point Y with the gas concentration a at the point X, and measures the fluctuation amount indicating the gas concentration change (step S3). Further, the fluctuation amount measurement unit 13 outputs the measurement result of the fluctuation amount to the source direction determination unit 14. Then, the source direction determination unit 14 stores the measurement result of the fluctuation amount as accumulated data.

  Next, when the operator looks at the azimuth information at the point Y and adjusts the posture while rotating 90 degrees to the right so that the east (E) direction is at the top of the screen, and moves in the E direction, the gas concentration detection unit 10 The gas concentration c at the point Z is measured (step S4). Further, the wearable computer specifies position information of the point Z in two-dimensional coordinates, for example, when measuring the gas concentration c.

  Next, the fluctuation amount measuring unit 13 compares the gas concentration c at the point Z with the gas concentration b at the point Y, and measures the fluctuation amount indicating the gas concentration change (step S5). Further, the fluctuation amount measurement unit 13 outputs the measurement result of the fluctuation amount to the source direction determination unit 14. Then, the source direction determination unit 14 stores the measurement result of the fluctuation amount as accumulated data.

  When the gas concentration c at the point Z and the gas concentration b at the point Y are the same, the source direction determination unit 14 compares the gas concentration c at the point Z with the gas concentration a at the point X, and there are eight ways. It is determined which one of the density fluctuation patterns is applicable. Then, the source direction determination unit 14 determines the direction associated with the corresponding density variation pattern as the source direction (step S6). FIG. 4 is an explanatory diagram showing an example of the correspondence between the density variation pattern and the source direction. 4 is based on the assumption that the worker moves as shown in FIG. 2.

  When the source direction determination unit 14 determines the source direction, the image processing unit 17 displays information indicating the source direction on the image indicating the direction information including the worker direction at the point Z output by the worker direction output unit 16. Is superimposed. Then, the image processing unit 17 controls the image display unit 18 (head-mounted display device) to display an image indicating the source direction with respect to the East (E) direction that is the worker direction at the point Z (step S). S7).

  In the present embodiment, even if the operator moves from the point Z or changes the direction of the body, the source direction is displayed on the head mounted display device according to the change in the direction measured by the geomagnetic sensor. That is, in this embodiment, since the source direction is displayed based on the worker direction, the displayed source direction changes when the worker direction changes. Therefore, the worker can continue working while paying attention to the gas generation source. Further, when the measured gas concentration is approaching or exceeds a numerical value that affects human health, the image processing unit 17 reads out a warning message and displays it on the image display unit 18. (Step S8).

  In the present embodiment, the point X is first moved in the North (N) direction and then moved in the direction East (E) at the Y point. It may move in the West (W) direction, and then rotate 90 degrees to the right and change the direction in the N direction. In this case, the generation source direction determination unit 14 specifies the positional relationship between the points based on the position information of the points X, Y, and Z specified at the time of measuring the gas concentration, for example. Further, in this case, the source direction determination unit 14 determines the source direction as (1) North, (2) South, and the like from the correspondence between the density variation pattern corresponding to FIG. 4 and the source direction. .

  For example, the wearable computer stores a density variation pattern and a source direction in association with each predetermined movement pattern. When the measurement of the gas concentration is started, the wearable computer specifies a movement pattern based on the change in the azimuth information output by the geomagnetic sensor, and changes the concentration fluctuation pattern and the generation source direction associated with the specified movement pattern. Based on this, the source direction is determined. It should be noted that the travel time or travel distance from the point X to the point Y and the travel time or travel distance from the point Y to the point Z are substantially the same. Further, it is assumed that the worker moves at almost the same speed during any movement time.

  In the present embodiment, in order to reduce the measurement error of the density change, the movement time is within 10 seconds and the movement distance is about 10 m. In addition, the worker continues to move only by changing the direction without stopping at the point Y. Further, when the log data of the gas concentration data is received from the gas sensor, it is automatically input to the wearable computer, but may be input manually.

  By repeating the above operation, it is possible to improve the accuracy of specifying the source direction and reduce errors. Moreover, the arrival time to a dangerous state can be estimated by monitoring the amount of fluctuation at a fixed point. If a distance sensor is used in combination, the distance to the generation source can be estimated, and work instruction information including the estimated distance can be displayed.

  Next, referring to FIGS. 5, 6, and 7, an example of source direction determination based on gas concentration variation and an example of a screen displayed by the head mounted display device are shown. 5 and 6 are explanatory diagrams illustrating an example of determining the source direction based on the gas concentration fluctuation amount. FIG. 7 is an explanatory diagram showing a work image and a display example on the head mounted display device.

  In the example of FIG. 5, it is assumed that the gas concentrations at point X, point Y, and point Z, here the carbon monoxide (CO) concentration, are measured as a: 50, b: 80, and c: 140 (ppm), respectively. It is assumed that the carbon monoxide has substantially the same weight as air and is closer to the generation source, the higher the CO concentration becomes, and the concentration distribution value decreases in inverse proportion to the distance from the generation source.

  In this example, since it corresponds to the density fluctuation pattern (3) of a <b <c, the source direction can be determined as the NE direction from the direction determination result of FIG. The field work support system specifies the source direction slightly from East (E) from the concentration change 30 ppm at the point Y and the concentration change 60 ppm at the point Z, and displays it on the display device. Here, when there is almost no density change at the point Y, that is, a = b, and the source direction can be determined as E.

  On the other hand, in the example of FIG. 6, the gas concentrations at point X, point Y, and point Z are measured as a: 50, b: 110, and c: 140 (ppm), respectively. Therefore, the on-site work support system corresponds to the concentration fluctuation pattern (3) of a <b <c, and therefore the NE direction is determined from the direction determination result of FIG. 4, but the concentration change 60 ppm at the point Y and the concentration at the point Z From the change of 30 ppm, the source direction is specified slightly as North (N) and displayed on the display device.

  Here, if there is almost no concentration change at the point Z, that is, b = c, and the field work support system determines that the source direction is N. Although the gas generation source direction is not necessarily limited to eight directions according to the variation amount of the gas concentration, one of the eight directions is displayed on the image because quick determination is required here.

  As described above, in this embodiment, when an operator having a gas sensor and a geomagnetic sensor moves within a predetermined range, changes in gas concentrations at three locations are detected, and positional information and changes in gas concentration data are analyzed. After that, the direction of the generation source is determined, and the direction of the generation source and the work instruction are displayed on the operator's head mounted display. Therefore, it is possible to show necessary information to the worker at the site where urgency is required without incurring much operational cost.

  As described above, a worker on site carries a wearable computer equipped with a geomagnetic sensor, and only attaches a small portable gas sensor to a head mounted display device and a helmet for outputting and displaying information of the computer. Further, the gas sensor can communicate with the wearable computer by wireless or wired communication, and when the gas concentration in the vicinity of the helmet is detected by the gas sensor, a data log is recorded in the wearable computer.

  A worker wearing these devices moves within a certain range in a short time during work without being aware of special measurement means, so that the gas concentration is measured at three points, and the wearable computer's position information and The direction of the source is immediately determined from the analysis result based on the change in the gas concentration at the monitor point, and not only the numerical data but also the contents of attention to the worker and the direction to move are displayed in an easy-to-understand manner on the head mounted display device. Therefore, even when the worker concentrates on the work and cannot fully recognize the surrounding situation, it is possible to prevent accidents and maintain a safe work environment by promptly instructing the work action.

  Further, in the method described in Patent Document 4, when the worker enters the prohibited entry area, it is determined that a safety problem has occurred, and a warning message is displayed on the head mounted display device. In addition to returning to the original position, it is impossible to determine in which direction it is dangerous to move. However, in this embodiment, the orientation information is always displayed on the head-mounted display device by the geomagnetic sensor, and the direction in which the worker is moving can be recognized, so the situation can be determined, and information on the next action is provided It is effective to support.

  In addition, in the method described in Patent Document 5, the position of the user is known by wearing the sensor, and one or more people move around to automatically create a contaminant level map. Take it. However, in the present embodiment, a gas distribution map is not created, but the direction of gas generation is quickly indicated, which is effective in the field where urgency is required. Further, by repeating this method, accuracy can be improved and errors can be reduced.

  As described above, according to the present invention, the following effects can be obtained. Normally, in a gas generation area such as carbon monoxide (CO), a gas sensor is installed or an operator carries a gas sensor to measure and display the CO concentration and integrated value, and then notifies them using an alarm lamp, buzzer, and vibration. However, this method can improve the safety because the operator can always know the work environment in the field with the head mounted display device without the operator looking at the sensor meter.

  In order to quickly determine the continuation of work, the direction of the generation source can be easily determined by measuring the CO concentration at three locations within a predetermined range.

  Further, by displaying warning indications and work instructions for workers on the head mounted display device in an easy-to-understand manner, work confirmation and accident prevention can be performed.

  In addition, it is possible to visualize the state of CO generation that is colorless and odorless and dangerous even in a dark place or a place with a lot of noise. Furthermore, if the fluctuation is monitored at a fixed point, it can also be applied to a method of estimating and displaying a work time reaching a danger.

  Next, the minimum configuration of the field work support system according to the present invention will be described. FIG. 8 is a block diagram showing a minimum configuration example of the field work support system. As shown in FIG. 8, the field work support system includes a gas concentration detection unit 1, a generation direction identification unit 2, and a display control unit 3 as minimum components.

  In the field work support system having the minimum configuration shown in FIG. 8, the generation direction specifying unit 2 specifies the gas generation direction based on the gas concentrations detected by the gas concentration detection unit 1 at a plurality of positions. Then, the display control means 3 performs control so that the gas generation direction specified by the generation direction specifying means 2 is displayed on the head mounted display device.

  Therefore, according to the field work support system having the minimum configuration, it is possible to show information necessary for the worker at the field where urgency is required without much operating cost.

  In addition, in this embodiment, the characteristic structure of the field work support system as shown to the following (1)-(5) is shown.

  (1) In the field work support system, the gas concentration detection means (for example, realized by the gas concentration detection unit 10) for detecting the gas concentration at the work site, and the gas concentration detection means include a plurality of positions (for example, the point X Generation direction specifying means (for example, realized by the fluctuation amount measurement unit 13 and the generation direction determination unit 14) for specifying the gas generation direction based on the gas concentration detected at the point Y and the point Z); Display control means (for example, realized by the image processing unit 17) for controlling the generation direction of the gas specified by the generation direction specifying means to be displayed on the head mounted display device (for example, realized by the image display unit 18). It is characterized by including.

  (2) In the field work support system, when the gas concentration detecting means detects the gas concentration at a plurality of positions, the generation direction specifying means detects the position information indicating the position (for example, the point X and the point indicated on the two-dimensional coordinates) Y and position Z position information) and the comparison result (for example, the variation amount of the gas concentration measured by the variation meter side unit 13) comparing the gas concentrations detected at each position, the direction of gas generation May be specified.

  (3) The field work support system includes worker direction detection means (for example, realized by the geomagnetism detection unit 15 and the worker direction information output unit 16) capable of detecting the direction in which the worker is facing, and displays The control means may be configured to control the gas generation direction specified by the generation direction specifying means to be displayed on the head mounted display device in accordance with the direction detected by the worker direction detection means.

  (4) The field work support system includes a position specifying means for specifying a position where the gas concentration detecting means detects the gas concentration based on a change in the direction in which the worker is detected detected by the worker direction detecting means. The generation direction specifying means is configured to specify the gas generation direction based on position information indicating the position specified by the position specifying means and a comparison result obtained by comparing the concentration of the gas detected at each position. May be.

  (5) In the field work support system, the display control means is configured to control to display a warning on the head mounted display device when the concentration of the gas detected by the gas concentration detection means is a predetermined value or more. It may be.

  The present invention can be applied to applications that support work for maintaining plant equipment.

DESCRIPTION OF SYMBOLS 1 Gas concentration detection means 2 Generation | occurrence | production direction specification means 3 Display control means 10 Gas concentration detection part 11 Data output part 12 Information input part 13 Fluctuation amount measurement part 14 Source direction determination part 15 Geomagnetism detection part 16 Worker direction output part 17 Image Processing unit 18 Image display control unit

Claims (6)

Gas concentration detection means for detecting the gas concentration at the work site;
The gas concentration at the first position, which is the position where the work start instruction is given, after a predetermined distance or when a predetermined time elapses when the worker moves from the first position in the first specific direction. The gas concentration at the second position, which is the worker's position, and the worker's position after a predetermined distance or when a predetermined time has elapsed when the worker moves from the second position in the second specific direction. Information that associates the magnitude relationship of the gas concentration at the third position, which is the position, with the gas generation direction is stored in advance, and the gas concentration at the first position detected by the gas concentration detecting means; Generation direction specification for specifying the gas generation direction by specifying the direction corresponding to the magnitude relationship between the gas concentration at the second position and the gas concentration at the third position based on the information. Means,
And a display control means for controlling the generation direction of the gas specified by the generation direction specifying means to be displayed on a head-mounted display device. Including worker direction detection means capable of detecting the direction in which the worker is facing,
Display control means, in response to said operator the direction in which the direction detection unit detects and controls to display the direction of a generated gas is generated direction specifying means has specified the head-mounted display device according to claim 1 Symbol placement field operations Support system. The field work support according to claim 1 or 2 , wherein the display control means controls to display a warning on the head mounted display device when the concentration of the gas detected by the gas concentration detection means is a predetermined value or more. system. The gas concentration at the first position, which is the position where the work start instruction is given, after a predetermined distance or when a predetermined time elapses when the worker moves from the first position in the first specific direction. The gas concentration at the second position, which is the worker's position, and the worker's position after a predetermined distance or when a predetermined time has elapsed when the worker moves from the second position in the second specific direction. Information that associates the magnitude relationship of the gas concentration at the third position, which is the position, with the gas generation direction is stored in advance, and the gas concentration detected at the first position is stored at the second position. Generation direction specifying means for specifying the direction of gas generation by specifying a direction corresponding to the magnitude relationship between the detected gas concentration and the gas concentration detected at the third position based on the information ; ,
A field work support device comprising: display control means for controlling the generation direction specified by the generation direction specification means to be displayed on a head-mounted display device. After the movement of the generation direction specifying means by a predetermined distance when the operator moves in the first specific direction from the first position, the concentration of the gas at the first position where the operation start instruction is given. Alternatively, the gas concentration at the second position, which is the position of the worker after the lapse of a predetermined time, and a predetermined distance after the worker moves in the second specific direction from the second position or for a predetermined time Storing in advance information associating the magnitude relationship of the gas concentration at the third position, which is the position of the operator after the passage, with the gas generation direction;
A gas concentration detecting means detects a gas concentration at the first position of the work site , a gas concentration at the second position, and a gas concentration at the third position ;
The generation direction specifying means detects the gas concentration at the first position, the gas concentration at the second position, and the gas concentration at the third position detected by the gas concentration detection means. Identifying the direction of gas generation by identifying the direction corresponding to the information based on the information ,
A field work support method, wherein display control means controls to display the specified generation direction on a head-mounted display device. On the computer,
The gas concentration at the first position, which is the position where the work start instruction is given, after a predetermined distance or when a predetermined time elapses when the worker moves from the first position in the first specific direction. The gas concentration at the second position, which is the worker's position, and the worker's position after a predetermined distance or when a predetermined time has elapsed when the worker moves from the second position in the second specific direction. Information that associates the magnitude relationship of the gas concentration at the third position, which is the position, with the gas generation direction is stored in advance, and the gas concentration detected at the first position is stored at the second position. A generation direction specifying process for specifying the gas generation direction by specifying a direction corresponding to the magnitude relationship between the detected gas concentration and the gas concentration detected at the third position based on the information ; ,
A field work support program for executing display control processing for controlling the generated direction to be displayed on the head mounted display device.

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