JP6518601B2 - Setting support device for optical safety sensor, setting support program, optical safety system and optical safety sensor - Google Patents

Description

  The present invention relates to a setting support device for an optical safety sensor, a setting support program, an optical safety system, and an optical safety sensor, and more specifically, an optical which optically detects an intruder in a protected area and outputs a detection signal. The present invention relates to an improvement of a setting support device for a safety sensor, a setting support program, an optical safety system, and an optical safety sensor.

  The optical safety sensor is an area monitoring device that optically detects an intruder that has invaded the protected area, for example, a person, and outputs a safety control signal for emergency stop of a machine tool, an industrial robot, etc. (for example, Patent documents 1 and 2). For example, the safety scanner is based on a light emitting unit for directing detection light toward the object, a light receiving unit for receiving the reflected light from the object to generate a light reception signal, and the light reception signal to the object. An optical scanning type area monitoring device is provided with a distance calculation unit for obtaining the distance of and a scanning unit for scanning the detection light in the circumferential direction around the rotation axis. The detection of the intruder is performed by specifying the position of the object from the distance to the object and the scanning angle of the detection light and collating with the protected area.

JP, 2009-296087, A JP, 2009-294734, A

  Setting data including area setting information for specifying a protected area and measurement setting information for specifying a measurement condition is created using the setting support apparatus. When a defect occurs in the optical safety sensor or an accident occurs, the cause of the occurrence of the abnormality can be grasped by reading out and analyzing the setting data from the optical safety sensor. However, in the conventional system, even if the setting data in the optical safety sensor is rewritten between the time of occurrence of the abnormality and the reading of the setting data, there is no means for identifying such rewriting of the setting data. . For this reason, it is difficult to determine whether the setting data read from the optical safety sensor is the setting data used at the time of abnormality occurrence, and there is a problem that the cause of the abnormality occurrence can not be grasped correctly. The

  In addition, by regularly checking the operation of the optical safety sensor, it is possible to prevent the occurrence of an abnormality such as a defect. However, in the conventional system, even if the setting data is transmitted irregularly from the setting support device to the optical safety sensor, there is no means for identifying such irregular transmission of the setting data.

  The present invention has been made in view of the above circumstances, and provides a setting support device for an optical safety sensor, a setting support program, an optical safety system, and an optical safety sensor capable of correctly grasping the cause of an abnormality occurrence. With the goal. In particular, for a plurality of setting data transmitted in the past, a setting support device for an optical safety sensor capable of identifying whether the transmission date and time and the content of the setting data are changed, a setting support program, an optical safety system, It aims at providing an optical safety sensor.

  A setting support device for an optical safety sensor according to a first aspect of the present invention is a setting support device for an optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal, Setting data generation means for generating setting data including area setting information for specifying the protected area based on operation, check code generation means for generating a check code based on the setting data, and the setting data On the basis of the setting data transmission means for transmitting the setting data to the optical safety sensor, the transmission information transmission means for transmitting the transfer information including the transmission date and time of the setting data and the check code to the transmission destination of the setting data; Transfer history acquisition means for acquiring a transfer history consisting of two or more of the transfer information from the optical safety sensor, and the acquired transfer history And a transfer history display means for displaying the surface.

  According to such a configuration, transfer information including the transmission date and time of the setting data and the check code is transmitted to the transmission destination of the setting data, and if there is a history acquisition instruction, the transfer history consisting of two or more transfer information is Acquired from the safety sensor and displayed on the screen. For this reason, it is possible to identify the transmission date and time and whether or not there is a change in the content of the setting data for a plurality of setting data transmitted in the past.

  In addition to the above configuration, the setting supporting device for an optical safety sensor according to the second aspect of the present invention is detachably mounted with a non-volatile storage device storing the setting data and the transfer history in the optical safety sensor. The transfer information includes identification information assigned to the optical safety sensor.

  According to such a configuration, since the transfer history including the identification information of the optical safety sensor is acquired and displayed on the screen, the storage device transmits the setting data for the plurality of setting data transmitted in the past. It can be identified whether it was attached to the optical safety sensor.

  The setting support apparatus for an optical safety sensor according to the third aspect of the present invention is configured to include version information indicating the number of updates of the setting data in the transfer information, in addition to the above configuration.

  According to such a configuration, since the transfer history including the version information of the setting data is acquired and displayed on the screen, whether or not the contents of the plurality of setting data transmitted in the past are changed easily It can be identified.

  The setting support apparatus for an optical safety sensor according to the fourth aspect of the present invention is configured to include identification information of setting data designated by the user in the transfer information, in addition to the above configuration. According to such a configuration, since the transfer history including the identification information specified by the user is acquired and displayed on the screen, whether or not there is a change in the content of the plurality of setting data transmitted in the past can be easily Can be identified.

  A setting support program for an optical safety sensor according to a fifth aspect of the present invention is a setting support program for an optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal. A setting data generation procedure for generating setting data including area setting information for specifying the protected area based on an operation, a check code generation procedure for generating a check code based on the setting data, and the setting data Based on the transmission data transmission procedure for transmitting the setting data to the optical safety sensor, the transmission information transmission procedure for transmitting the transmission information including the transmission date and time of the setting data and the check code to the transmission destination of the setting data, and the history acquisition instruction. A transfer history acquisition procedure for acquiring a transfer history consisting of two or more pieces of the transfer information from the optical safety sensor, and To perform the transfer history display procedure for displaying the transfer history screen to the computer.

  An optical safety system according to a sixth aspect of the present invention comprises an optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal, and a setting support device that creates setting data for the optical safety sensor An optical safety system comprising: setting data generation means for generating setting data including area setting information for specifying the protected area based on a user operation; and a check code based on the setting data Check code generation means, setting data transmission means for transmitting the setting data to the optical safety sensor, transfer information including transmission date and time of the setting data and the check code to the transmission destination of the setting data A transmission history display unit is provided that displays transmission history composed of two or more pieces of the above-described transfer information on a screen.

  An optical safety system according to a seventh aspect of the present invention is configured such that, in addition to the above configuration, at least one of the optical safety sensor and the setting support device includes the transfer history display means.

  An optical safety sensor according to an eighth aspect of the present invention is an optical safety sensor that optically detects an intruding object in a protected area and outputs a detection signal, and for designating the protected area from a setting support device Setting data receiving means for receiving setting data including area setting information, transmission date and time of the setting data, and transfer information reception from the setting support apparatus, including transfer information including a check code obtained from the setting data And a transfer history storage unit that holds a transfer history composed of two or more of the transfer information, and a transfer history display unit that displays the transfer history on a screen.

  According to the present invention, with respect to a plurality of setting data transmitted in the past, it is possible to identify the transmission date and time and whether or not the content of the setting data has been changed. A setting support device for an optical safety sensor, a setting support program, an optical safety system, and an optical safety sensor can be provided.

It is a system figure showing an example of 1 composition of optical safety system 1 by an embodiment of the invention. It is the figure which showed the structural example of the safety scanner 10 of FIG. It is the block diagram which showed an example of the function structure in the measurement unit 12 of FIG. It is the block diagram which showed an example of the function structure in the display unit 11 of FIG. It is a figure showing an example of composition of display unit 11 of Drawing 2, and a case where display unit 11 is seen from the upper part is shown. It is the block diagram which showed an example of the function structure in the setting assistance apparatus 20 of FIG. FIG. 7 is a diagram showing an example of the operation of the setting support device 20 of FIG. 6, in which a system screen 24 displayed on a display 21 is shown. FIG. 7 is a diagram showing an example of the operation of the setting support device 20 of FIG. 6, in which a transfer history screen 25 is shown. It is the flowchart which showed an example of operation | movement at the time of transfer of the setting data in the setting assistance apparatus 20 of FIG. It is the flowchart which showed an example of operation | movement at the time of acquisition of the transfer log | history in the setting assistance apparatus 20 of FIG.

  First, a schematic configuration of an optical safety system on which the present invention is premised will be described below with reference to FIGS. 1 to 5.

<Optical safety system 1>
FIG. 1 is a system diagram showing one configuration example of an optical safety system 1 according to an embodiment of the present invention. The optical safety system 1 includes a safety scanner 10 that detects an intruder in a protected area and outputs a detection signal, and a setting support device 20 that generates setting data for the safety scanner. The safety scanner 10 and the setting support device 20 are connected to each other via the communication cable 2.

  The detection signal is a safety control signal for urgently stopping a machine such as a machine tool or an industrial robot. This detection signal is output to a safety control device (not shown) that controls the machine, for example, a PLC (programmable logic controller). By switching the output state of the detection signal to the off state, the safety control device can stop the operation of the machine to be controlled.

  The protected area is an area to be monitored for intruder detection. For example, an area around mechanical equipment such as a work area of a machine tool or an industrial robot, a movement area of a transport vehicle, etc. is designated as a protection area.

  The safety scanner 10 is an optical scanning safety sensor that optically detects an intruding object in a protected area, and includes a display unit 11 and a measurement unit 12. The display unit 11 is a user interface unit that receives a user operation and displays an operation state, setting data, and the like, and is provided with a connection port of the communication cable 2 and an output port of a safety control signal.

  The measurement unit 12 is a sensor head unit that emits detection light to the detection area, receives reflected light from an object in the detection area, and detects an intruder. The detection area is the largest area detectable by the measurement unit 12. The protected area is an area designated in the detection area. The measurement unit 12 is provided with a rotary optical system that scans detection light in the circumferential direction around a rotation axis, a camera that captures a protected area, and generates a camera image.

  In the safety scanner 10, a warning area can be set in addition to the protected area. When the safety scanner 10 detects an intruding object in the warning area, the safety scanner 10 outputs an auxiliary output signal to notify the user by lighting an indicator light or the like.

  For example, the measurement unit 12 is installed on a horizontal floor surface or the like. The display unit 11 has an OSSD (Output Signal Switching Device), and in a state in which no intruder exists in the protection area, the OSSD is turned on and a detection signal of the on state is output. On the other hand, in the state where an intruder exists in the protected area, the OSSD is turned off, and a detection signal of the off state is output.

  The setting support device 20 is an information processing terminal, such as a personal computer, provided with a display 21, a keyboard 22 and a mouse 23. For example, in the setting support device 20, setting data for specifying a protected area and measurement conditions is created. The setting data includes area setting information for specifying a protected area, and measurement setting information for specifying a measurement condition. Further, in the setting support device 20, an operation of acquiring distance measurement information and a camera image from the safety scanner 10 and displaying the same on the display 21 is performed.

  For example, the setting support device 20 can be realized by operating a computer based on a setting support program for a safety scanner. In addition, such a setting support program is provided by being recorded on a computer readable recording medium such as a CD-ROM, or provided via a network.

<Safety Scanner 10>
FIG. 2 is a view showing a configuration example of the safety scanner 10 of FIG. 1, and shows a separation type safety sensor which can separate the display unit 11 from the measurement unit 12. The figure shows the safety scanner 10 viewed from the front. The display unit 11 and the measurement unit 12 are connected to each other via a wiring cable (not shown). Two or more measurement units 12 can be connected to this display unit 11 at the same time.

  The scanner housing 120 of the measurement unit 12 is a housing that accommodates a rotational optical system that emits detection light in the horizontal direction and scans the detection light along the horizontal scan surface 3 and accommodates the rotational optical system. A protective cover 121 for protecting the rotary optical system is attached to the unit. The scan plane 3 is a plane orthogonal to the rotation axis of the rotary optical system.

  For the detection light, for example, a laser beam having a wavelength in the infrared region is used. The detection light is repeatedly scanned at a constant scanning cycle. The scanner housing 120 is provided with two fixed cameras 122 and 123, and an indicator 124 for displaying an output state of a detection signal. The fixed cameras 122 and 123 and the indicator 124 are disposed above the housing of the rotary optical system.

  Each of the fixed cameras 122 and 123 is an imaging device that captures a protected area and generates a camera image as a monitoring moving image, and is arranged in different directions. The stationary camera 122 is disposed on the left side of the indicator 124 when viewed from the direction toward the measurement unit 12. On the other hand, the stationary camera 123 is disposed on the right side of the indicator 124 when viewed from the direction toward the measurement unit 12. That is, the fixed cameras 122 and 123 are arranged at different positions in the circumferential direction with respect to the rotation axis of the rotary optical system, and the fixed camera 122 views the area on the right of the front and rear direction as viewed from the measurement unit 12 While the fixed camera 123 is a camera that is housed inside, the fixed camera 123 is a camera that holds the area on the left side of the front-rear direction within the angle of view as viewed from the measurement unit 12. Since the fixed cameras 122 and 123 are disposed above the scan plane 3, it is possible to obtain a camera image that overlooks the scan plane 3.

  The indicator 124 is an indicator light that displays the output state or the operation state of the detection signal. The indicator 124 lights in different display colors according to the output state of the detection signal. For example, the indicator 124 lights in red when the OSSD is in the off state, and lights in green when the OSSD is in the on state.

  The display unit 11 is disposed on the top surface of the measurement unit 12. In the display unit 11, a display panel 111, an indicator 112, an operation key 113, and a cable connection port 114 are provided.

  The display panel 111 is a display device that displays an operation state, distance measurement information, a camera image, setting data, and the like on the screen. For example, the display panel 111 is an LCD (liquid crystal display) panel. The indicator 112 is an indicator light for displaying an operation state, an output state of a detection signal, and the like. The cable connection port 114 is an input / output terminal unit to which the communication cable 2 is detachably connected. The display unit 11 communicates with the measurement unit 12 and can check the protected area and the detection history of intruders even at a position separated from the measurement unit 12.

<Measurement unit 12>
FIG. 3 is a block diagram showing an example of a functional configuration in the measurement unit 12 of FIG. The measurement unit 12 includes a light emission control unit 30, a light emission light source unit 31, a scanning unit 32, a rotary encoder 33, a light receiving unit 34, a distance calculation unit 35, an intrusion detection unit 36, an input / output port 37, an area storage unit 38, It comprises a scan image generation unit 39 and fixed cameras 122 and 123.

  The projection light source unit 31 includes light emitting elements such as LD (laser diode) or LED (light emitting diode), and generates detection light. The light emission control unit 30 controls the light emission light source unit 31 to generate pulse-like detection light at a constant time interval. The scanning unit 32 emits the detection light toward the object, and also includes a rotation optical system that circumferentially scans the detection light around the rotation axis, and a drive unit that rotates the rotation optical system around the rotation axis. Configured For example, the rotary optical system of the scanning unit 32 includes a light projection mirror that reflects the detection light toward the object, a light receiving lens that makes the reflected light from the object incident, and a light receiving element that transmits the light that has passed through the light receiving lens. It is comprised by the light reception mirror reflected towards.

  The light receiving unit 34 is formed of a light receiving element such as a PD (photodiode) and receives light reflected from the object to generate a light receiving signal. The rotary encoder 33 is a rotation detection device that detects the rotation of the rotary optical system and generates a pulse signal whose pulse repetition interval corresponds to the rotation speed. The light emission control unit 30 controls the light emission light source unit 31 based on the pulse signal of the rotary encoder 33 to adjust the light emission timing of the detection light. For example, detection light is emitted each time the rotary optical system of the scanning unit 32 rotates by 360 ° / 1000.

  The distance calculation unit 35 obtains the distance to the object based on the light reception signal from the light reception unit 34. The distance calculating unit 35 is a distance measuring unit that measures a distance by a TOF (Time Of Flight) method, and the light reception signal is compared with the pulse signal of the rotary encoder 33 to emit the detection light. By specifying the delay time until the reflected light corresponding to the detection light is received, the distance to the object is calculated as the detection distance.

  The intrusion detection unit 36 detects an intruder in the protected area based on distance measurement information including the detection distance obtained by the distance calculation unit 35 and the scanning angle of the detection light, and outputs a detection signal. The scanning angle of the detection light is specified based on the pulse signal of the rotary encoder 33. Further, whether or not an intruder exists in the protected area is determined by specifying a two-dimensional position of the intruder from the detection distance and the scanning angle of the detection light and collating with the position information of the protected area.

  The detection signal is transmitted to the display unit 11 via the input / output port 37. The input / output port 37 is a communication interface unit for communicating with the display unit 11, and receives setting data from the display unit 11, while displaying the operation state, distance measurement information, detection signal, scan image and camera image. Send to The area storage unit 38 holds position information indicating a two-dimensional position of the protected area. The position information of the protected area is obtained from the display unit 11 via the input / output port 37.

  The scan image generation unit 39 generates a scan image based on distance measurement information including the scanning angle and the detection distance acquired at the time of reflected light detection. The scan image is an image in which a plurality of distance measurement information obtained within the scanning period of the detection light is two-dimensionally displayed, and each distance measurement information is measured on the scanning surface 3 specified by the scanning angle and the detection distance. It is shown as a distance position. The scan plane 3 is a plane orthogonal to the rotation axis of the rotary optical system of the scanning unit 32. The scan image generation unit 39 generates a scan image as a monitoring moving image, and updates the scan image in synchronization with the scanning cycle of the detection light.

  The scan image and the camera images captured by the fixed cameras 122 and 123 are transmitted to the display unit 11 via the input / output port 37. The intrusion detection unit 36 transmits detection information including the detected position of the intruder (detected position) and the detected time (detected time) to the display unit 11. For example, the operation time after the main power is turned on can be used as the detection time.

  Although an example of the safety scanner 10 in which one measurement unit 12 is connected to one display unit 11 is shown, a plurality of measurement units 12 may be connected to one display unit 11. May be possible. In this case, the OSSDs of the display unit 11 are turned on when all the target measurement units 12 confirm that the OSSDs should be turned on in the respective protection areas, the OSSDs are turned on, and in other cases OSSD is turned off. By providing the scan image generation unit 39 in the measurement unit 12, the load of the scan image generation process can be dispersed.

<Display unit 11>
FIG. 4 is a block diagram showing an example of a functional configuration in the display unit 11 of FIG. The display unit 11 includes an operation unit 40, a control unit 41, an input / output port 42, a display unit 43, an external communication port 44, an external output port 45, a buffer 46, a non-volatile memory 47 and a storage device 48.

  The input / output port 42 is a communication interface unit that communicates with the measurement unit 12 and transmits setting data to the measurement unit 12 while operating status, distance measurement information, detection signal, scan image and camera image from the measurement unit 12 Receive

  The external communication port 44 is a communication interface unit that communicates with the setting support device 20, and receives setting data from the setting support device 20 while setting the operation state, distance measurement information, scan image and camera image. Send to The external output port 45 is an interface unit that outputs the output signal (on state or off state) of the OSSD as a detection signal (safety control signal) to the safety control device. The external output port 45 is configured to transmit the output signal (on state or off state) of the OSSD as a detection signal (safety control signal) to the safety control device by bi-directional communication with the safety control device. It is good.

  The operation unit 40 generates an operation signal based on the pressing operation of the operation key 113 and outputs the operation signal to the control unit 41. The display unit 43 drives the display panel 111 and the indicator 112 to display setting data, an operation state, distance measurement information, a scan image and a camera image on the display panel 111, and displays the operation state on the indicator 112.

  The control unit 41 acquires distance measurement information, a scan image, and a camera image from the measurement unit 12 and stores the information in the buffer 46. When the data accumulated in the buffer 46 exceeds a predetermined amount, the control unit 41 overwrites the oldest data and stores new data. The buffer 46 is a volatile storage element for temporary recording built in the safety scanner 10.

  Further, the control unit 41 acquires detection information of an intruder from the measurement unit 12, and generates a detection history based on the detection information. The detection history consists of the detected position of the intruder (detection position), the time when the intruder was detected (detection time), and the monitoring moving image whose detection time is included in the acquisition period. Information is stored in association with each other as detection history.

  The non-volatile memory 47 is a non-volatile storage element incorporated in the safety scanner 10. The non-volatile memory 47 holds the detection history created by the control unit 41. The non-volatile memory 47 is a moving image acquired about the detection time, and is a detection history storage unit that stores a scan image and a camera image having a predetermined time length as a detection history. By confirming the scan image stored as the detection history, the peripheral situation before and after the detection time can be easily identified. When the area setting or the setting bank is changed, the control unit 41 deletes the corresponding detection history.

  The storage device 48 is formed of a non-volatile storage element, and is detachably attached to the display unit 11. The storage device 48 holds setting data acquired from the setting support device 20. The detection history may be stored in the storage device 48.

  The control unit 41 reads the detection history from the non-volatile memory 47 based on the history request from the external device, that is, the setting support device 20, and transmits the detection history to the setting support device 20 via the external communication port 44. Although the scan image generation unit 39 shows an example of the safety scanner 10 provided in the measurement unit 12, the scan image generation unit 39 may be provided in the display unit 11 instead. Alternatively, the scan image generation unit 39 may be provided in each of the display unit 11 and the measurement unit 12. In this case, instead of transmitting and receiving a scan image between the measurement unit 12 and the display unit 11, distance measurement information is transmitted and received, and even when the communication speed is slow, display of the scan image is facilitated. .

<Removable Storage Device 48>
FIG. 5 is a view showing a configuration example of the display unit 11 of FIG. 2, and shows a case where the display unit 11 is viewed from above. A storage device 48 is detachably mounted on the display housing 110 of the display unit 11.

  The storage device 48 stores setting data and a transfer history to be described later. For example, the storage device 48 is formed of a semiconductor storage element such as a flash memory. The storage device 48 is screwed to the upper surface of the display housing 110. In the storage device 48, only the latest setting data is held as registration data, and when new setting data is obtained from the setting support device 20, the setting data in the storage device 48 is updated by the setting data.

  Next, a more detailed configuration of the setting support device 20 for the optical safety sensor according to the present invention will be described below with reference to FIGS.

<Setting support device 20>
FIG. 6 is a block diagram showing an example of a functional configuration in the setting support device 20 of FIG. The setting support device 20 includes an operation unit 201, a setting data generation unit 202, a setting data storage unit 203, a check code generation unit 204, a system screen display unit 205, a communication unit 206, a registration data acquisition unit 207, and a setting data transmission unit 208. The transfer information transmission unit 209, the transfer history acquisition unit 210, and the transfer history display unit 211.

  The operation unit 201 generates an operation signal based on the operation of the keyboard 22 and the mouse 23, and the setting data generation unit 202, the system screen display unit 205, the registration data acquisition unit 207, the setting data transmission unit 208, and the transfer information transmission unit 209 and the transfer history acquisition unit 210.

  The communication unit 206 is an interface unit that communicates with the display unit 11 of the safety scanner 10, and transmits setting data to the safety scanner 10. On the other hand, the safety scanner 10 transmits an operation state, distance measurement information, a scanned image, a camera image, Receive detection history.

  The setting data generation unit 202 generates setting data for monitoring the protected area based on a user operation, and stores the setting data in the setting data storage unit 203. The setting data includes area setting information for specifying a protected area, and measurement setting information for specifying a measurement condition. For example, area setting information indicating a two-dimensional position, shape or size on the scan plane 3 of the protected area is created. In addition, measurement setting information indicating the response speed, the size of the intruder to be detected, the scanning cycle or the resolution is created.

  The check code generation unit 204 generates a check code based on the setting data in the setting data storage unit 203. The check code is obtained by encoding the setting data.

  For example, a method of coding by cyclic redundancy check (CRC) is used for coding setting data. The CRC is one of the error detection coding processes, and takes a data string of an arbitrary length as an input, and outputs an integer value or a real value having a predetermined number of digits. Also, CRC is an irreversible conversion that can not restore the original data string from the output value. Specifically, the remainder when the input value is divided by a previously specified divisor is output as a CRC value.

  When the two setting data are compared, if the check code matches, it can be determined that there is no difference in the contents of the setting data. On the other hand, if the check codes do not match, it can be determined that there is a difference in the content of the setting data.

  The method of encoding by CRC has higher accuracy in error detection than the method of encoding by checksum or parity check, and an event which associates different input values with the same output value is less likely to occur. For this reason, by using a CRC to encode setting data, the check code matches even though the setting data is changed, and the setting data is not changed, as compared to the case where the checksum or parity check is used. Erroneous identification can be suppressed.

  In addition, since it is difficult to decipher the regularity of the change of the output value with respect to the change of the input value, it is difficult to set the same code with different setting contents intentionally because the CRC encoding method is difficult to read is there. For this reason, it is suitable, for example, in managing setting data of optical safety sensors such as safety scanners and safety light curtains.

  The system screen display unit 205 displays a system screen on the display 21 based on a user operation. The system screen is a screen for creating setting data for the safety scanner, or displaying an operation state of the safety scanner 10 or the like, or displaying a detection history of the safety scanner 10.

  The registration data acquisition unit 207 acquires registration data from the safety scanner 10 via the communication unit 206 based on the registration data acquisition instruction, and stores the registration data in the setting data storage unit 203. The setting data generation unit 202 can generate new setting data by editing the registration data acquired from the safety scanner 10.

  The setting data transmission unit 208 reads the setting data from the setting data storage unit 203 based on the setting data transfer instruction, and transmits the setting data to the safety scanner 10 via the communication unit 206. The transfer information transmission unit 209 generates transfer information of the setting data, and transmits the setting information to the transmission destination of the setting data via the communication unit 206. For example, transfer information is automatically transmitted at the time of transmission of setting data.

  The transfer information includes the transmission date and time of the setting data, and the check code calculated from the setting data by the check code generation unit 204. The transfer information also includes identification information assigned to the safety scanner 10, for example, a serial number. The serial number is assigned when manufacturing the safety scanner 10 or when registering the safety scanner 10 with the optical safety system 1. Such identification information is acquired from the safety scanner 10, for example, at the time of transmission of setting data.

  Further, the transfer information includes identification information of setting data designated by the user, for example, a file name and a creator name. At the time of generation of setting data, the setting data generation unit 202 assigns, to setting data, a file name and a creator name arbitrarily designated by the user.

  The transfer information may include the model number of the safety scanner 10 assigned when the safety scanner 10 is manufactured, and the number (the number of heads) of the measurement units 12 connected to the display unit 11. Also, the transfer information may include version information indicating the number of times of updating of the setting data. When new setting data is generated by editing the registration data acquired from the safety scanner 10, the setting data generation unit 202 adds version information to the setting data, or updates already added version information. Do.

  The transfer history acquisition unit 210 acquires the transfer history from the safety scanner 10 via the communication unit 206 based on the transfer history acquisition instruction. The transfer history consists of two or more pieces of transfer information. The transfer history display unit 211 displays the transfer history acquired by the transfer history acquisition unit 210 on the transfer history screen. The transfer history screen is displayed on the display 21. The transfer history is composed of a plurality of transfer information, and the transfer information is listed.

<System screen 24>
FIG. 7 is a diagram showing an example of the operation of the setting support device 20 of FIG. 6, and shows a system screen 24 displayed on the display 21. As shown in FIG. The system screen 24 is a screen for setting the operation of the safety scanner 10 and confirming the operation state of the safety scanner 10 and distance measurement information, and is displayed on the display 21.

  An image display area 241 is provided on the system screen 24, and a setting tab 242, a monitor tab 243, a detection history tab 244, and a display object selection tab 245 are displayed. In the image display area 241, the current scan image 5 is displayed.

  The scan image 5 is a distance measurement line image in which a distance measurement line 51 connecting a plurality of distance measurement positions obtained within the scanning period of the detection light is shown on the scanning surface 3 and is constant corresponding to the scanning period of the detection light It is updated at the frame rate of By looking at the scanned image 5, it is possible to grasp the current situation around the measurement unit 12.

  In this example, the scan image 5 is drawn with the upward direction of the system screen 24 as the front direction of the measurement unit 12. The distance measurement line 51 is a figure indicating the boundary of the detection area, and is formed of a broken line in which the distance measurement positions corresponding to the detection distance are plotted at predetermined scanning angles. On this scanned image 5, orthogonal coordinates with the measurement unit 12 as the origin, y-axis in the front-rear direction and x-axis in the left-right direction are arranged, and a figure showing the protected area 52 is superimposed.

  The setting tab 242 is an operation icon for displaying an editing screen for creating setting data as the system screen 24. The monitor tab 243 is an operation icon for displaying a current scan image or a camera image in the image display area 241. The detection history tab 244 is an operation icon for displaying a detection history.

  In this example, the setting tab 242 is selected, and menu items 246 to 248 for setting the operation of the safety scanner 10, a setting read button 249 and a history read button 250 are displayed on the left side of the image display area 241. ing.

  The display target selection tab 245 is an operation icon for selecting the measurement unit 12 to be displayed. When a plurality of measurement units 12 are connected to the display unit 11 connected to the setting support device 20, an arbitrary measurement unit 12 is selected as a display object by operating the display object selection tab 245 The camera image and the scanned image can be displayed on the image display area 241. In this example, the measurement unit “head 1” is selected as a display target, and the corresponding scan image 5 is displayed.

  The menu item 246 is an operation icon for specifying the measurement conditions of the safety scanner 10. The menu item 247 is an operation icon for specifying the protected area 52. The menu item 248 is an operation icon for transmitting setting data to the safety scanner 10. In this example, menu item 247 is selected.

  The setting read button 249 is an operation icon for reading the setting data held as registration data from the safety scanner 10. The history read button 250 is an operation icon for reading out the transfer history held by the safety scanner 10 from the safety scanner 10.

<Transfer history screen 25>
FIG. 8 is a diagram showing an example of the operation of the setting support device 20 of FIG. 6, and a transfer history screen 25 is shown. The transfer history screen 25 is a screen for viewing the transfer history acquired from the safety scanner 10, and is displayed on the display 21.

  A history list 251 is displayed on the transfer history screen 25. In the history list 251, a plurality of pieces of transfer information having different transmission dates and times are arranged in the order of transmission date and time. In the history list 251, four pieces of transfer information are arranged in the vertical direction, and the latest transfer information is arranged at the top. In addition to the transmission date and time, a file name, a CRC code, a unit identification number and a creator name are added to the transfer information.

  The transmission date is the date and time when the setting data was transmitted. The file name and the creator name are identification information of setting data designated by the user. The CRC code is a check code calculated from the setting data. The unit identification number is a serial number assigned to the display unit 11 of the safety scanner 10.

  In this example, a check code consisting of a 4-digit integer value represented using a hexadecimal number is displayed as a CRC code. For example, the check code "0D75" is displayed in the transfer information corresponding to the setting data of the file name "setting 2. xxx", and the transfer information corresponding to the setting data of the file name "setting 1. xxx" is checked. The code "1DDE" is displayed.

  These check codes are created by encoding setting data including area setting information and measurement setting information. For example, when the protected area is specified by specifying three or more vertices, position information indicating the two-dimensional position of each vertex is the area setting information. Also, various parameters for specifying the resolution, response speed, and detection size are measurement setting information.

  By displaying a check code obtained by encoding such setting data, it is possible to easily identify whether or not there is a change in the content of the setting data, as compared to the case where the setting data itself is displayed. In particular, in the case of a CRC code, unlike simple data compression due to a reduction in the number of bits, etc., even a slight change in position information, the check code differs significantly, so it is easy to see if the setting data has changed. .

  If the transfer information of the transmission date “2015/09/30, 9:30:00” in the history list 251 and the transfer information of the transmission date “2015/09/30, 9: 25:30” are compared, the file name Are different from each other, and it can be seen that setting data with different file names have been transferred.

  Also, if the transfer information of the transmission date “2015/09/29, 17:30:00” and the transfer information of the transmission date “2015/09/29, 17:00: 25” are compared, the file name is one I do, but the check codes are different from each other. Therefore, it can be understood that setting data having different contents has been transferred.

  Also, if the transfer information of the transmission date "2015/09/30, 9:25:30" and the transfer information of the transmission date "2015/09/29, 17:30:00" are compared, the file name is one. The names of the creators are different from each other. Therefore, it can be seen that setting data different from the creator has been transferred.

  Steps S101 to S103 in FIG. 9 are flowcharts showing an example of the operation at the time of transfer of setting data in the setting support device 20 in FIG. In the figure, the procedure when the menu item 248 in the system screen 24 is operated is shown.

  First, the setting data transmission unit 208 reads setting data from the setting data storage unit 203, and transmits the setting data to the safety scanner 10 via the communication unit 206 (step S101). Next, the transfer information transmission unit 209 generates transfer information of the setting data (step S102), and transmits the setting information to the transmission destination of the setting data via the communication unit 206 (step S103).

  Steps S <b> 201 to S <b> 205 in FIG. 10 are flowcharts showing an example of an operation at the time of acquisition of the transfer history in the setting support device 20 in FIG. 6. In the figure, the processing procedure when the history read button 250 in the system screen 24 is operated is shown.

  First, the transfer history acquisition unit 210 confirms the presence or absence of the transfer history (step S201), and if the transfer history is held, acquires the transfer history from the safety scanner 10 via the communication unit 206 (steps S202 and S203). ). Next, the transfer history display unit 211 displays the transfer history acquired by the transfer history acquisition unit 210 in a list on the transfer history screen 25 (step S204). On the other hand, if the transfer history is not held, the transfer history acquisition unit 210 notifies the user by displaying error information on the system screen 24 (step S205).

  When new setting data is created and transmitted from the setting support device 20 to the safety scanner 10, processing for adding new transfer information to the transfer history is performed, for example, in the setting support device 20. Specifically, when transmitting new transfer information to the safety scanner 10, the setting support device 20 acquires all transfer information stored in the safety scanner 10 from the safety scanner 10, and transfers new transfer information to the transfer information. Update transfer history by adding information. The safety scanner 10 may be configured to add new transfer information to the transfer history.

  According to the present embodiment, when the transfer information including the transmission date and time of the setting data and the check code is transmitted to the transmission destination of the setting data, and there is a history acquisition instruction, the transfer history including two or more transfer information It is acquired from the scanner 10 and displayed on the transfer history screen 25. For this reason, it is possible to identify the transmission date and time and whether or not there is a change in the content of the setting data for a plurality of setting data transmitted in the past.

  In particular, since the transfer history including the identification information of the safety scanner 10 is acquired and displayed on the transfer history screen 25, the storage device 48 stores any safety scanner at the time of transmitting setting data for a plurality of setting data transmitted in the past. 10 can be identified. Further, since the transfer history does not include the area setting information and the measurement setting information of the setting data, the data stored in the storage device 48 as compared to the case where all the setting data transmitted in the past are held as the transfer history. The amount can be reduced.

  In the present embodiment, an example in which the setting data and the transfer history are held in the common storage device 48 has been described, but in the present invention, the safety scanner 10 stores the setting data and the transfer history in separate storage elements. It can apply also to the thing of the structure hold | maintained to each.

  Further, in the present embodiment, an example in which the transfer history is displayed on the screen in the setting support device 20 has been described, but the present invention does not limit the display method of the transfer history to this. For example, the transfer history may be displayed on the display unit of the optical safety sensor. Further, since the display area of the optical safety sensor is smaller in display space than the display 21 of the setting support device 20, items to be displayed as the transfer history may be limited. In this case, for example, a transmission date (reception date) and a file name are displayed as a transfer history, or a CRC code is displayed.

  In the present embodiment, an example in which the setting support device 20 performs the operation setting of the safety scanner 10 has been described. However, according to the present invention, the optical safety sensor in which the operation setting is performed using the setting support device 20 is It is not limited to the scanner 10. For example, the present invention can be applied to a light curtain or a photoelectric switch that two-dimensionally monitors an area on a plane.

Reference Signs List 1 optical safety system 10 safety scanner 11 display unit 110 display housing 111 display panel 112 indicator 113 operation key 114 cable connection port 115 storage device 12 measurement unit 120 scanner housing 121 protective cover 122, 123 fixed camera 124 indicator 20 setting support device 21 Display 22 Keyboard 23 Mouse 24 System Screen 25 Transmission History Screen 30 Projection Control Unit 31 Projection Light Source Unit 32 Scanning Unit 33 Rotary Encoder 34 Light Receiving Unit 35 Distance Calculation Unit 36 Intrusion Detection Unit 37 I / O Port 38 Area Storage Unit 39 Scan Image generation unit 40 Operation unit 41 Control unit 42 Input / output port 43 Display unit 44 External communication port 45 External output port 46 Buffer 47 Non-volatile memory 48 Storage device 201 Operation unit 202 Setting data generation unit 2 3 setting data storage unit 204 check code generation unit 205 system screen display unit 206 communication unit 207 registration data acquisition unit 208 setting data transmission unit 209 transfer information transmission unit 210 transfer history acquisition unit 211 transfer history display unit 2 communication cable 3 scan plane 5 Scanned image 51 Distance measuring line 52 Protected area

Claims (8)

A setting support device for an optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal,
Setting data generating means for generating setting data including area setting information for specifying the protected area based on a user operation;
Check code generation means for generating a check code based on the setting data;
Setting data transmitting means for transmitting the setting data to the optical safety sensor;
Transfer information transmitting means for transmitting transfer information including the transmission date and time of the setting data and the check code to the transmission destination of the setting data;
Transfer history acquisition means for acquiring a transfer history consisting of two or more pieces of the transfer information from the optical safety sensor based on a history capture instruction;
A setting support device for an optical safety sensor, comprising: transfer history display means for displaying the acquired transfer history on a screen. A non-volatile storage device storing the setting data and the transfer history is detachably attached to the optical safety sensor.
The setting support apparatus for an optical safety sensor according to claim 1, wherein the transfer information includes identification information assigned to the optical safety sensor.   The setting support apparatus for the optical safety sensor according to claim 1 or 2, wherein the transfer information includes version information indicating the number of updates of the setting data.   The setting support apparatus for an optical safety sensor according to any one of claims 1 to 3, wherein the transfer information includes identification information of setting data designated by a user. A setting support program for an optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal,
A setting data generation procedure for generating setting data including area setting information for specifying the protected area based on a user operation;
A check code generating procedure for generating a check code based on the setting data;
A setting data transmission procedure for transmitting the setting data to the optical safety sensor;
A transfer information transmission procedure for transmitting transfer information including the transmission date and time of the setting data and the check code to the transmission destination of the setting data;
A transfer history acquisition procedure for acquiring a transfer history consisting of two or more of the transfer information from the optical safety sensor based on a history capture instruction;
A setting support program for an optical safety sensor, which causes a computer to execute a transfer history display procedure for displaying the acquired transfer history on a screen. An optical safety system comprising an optical safety sensor that optically detects an intruder in a protected area and outputting a detection signal, and a setting support device that creates setting data for the optical safety sensor,
Setting data generating means for generating setting data including area setting information for specifying the protected area based on a user operation;
Check code generation means for generating a check code based on the setting data;
Setting data transmitting means for transmitting the setting data to the optical safety sensor;
Transfer information transmitting means for transmitting transfer information including the transmission date and time of the setting data and the check code to the transmission destination of the setting data;
An optical safety system comprising: transfer history display means for displaying a transfer history consisting of two or more pieces of transfer information on a screen.   7. The optical safety system according to claim 6, wherein at least one of the optical safety sensor and the setting support device has the transfer history display means. An optical safety sensor that optically detects an intruder in a protected area and outputs a detection signal,
Setting data receiving means for receiving setting data including area setting information for specifying the protected area from the setting support apparatus;
Transfer information receiving means for receiving transfer information including the transmission date and time of the setting data and the check code obtained from the setting data from the setting support device;
Transfer history storage means for holding a transfer history consisting of two or more of the transfer information;
An optical safety sensor comprising transfer history display means for displaying the transfer history on a screen.

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