WO2021256355A1 - ロボット制御装置 - Google Patents
ロボット制御装置 Download PDFInfo
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- WO2021256355A1 WO2021256355A1 PCT/JP2021/021984 JP2021021984W WO2021256355A1 WO 2021256355 A1 WO2021256355 A1 WO 2021256355A1 JP 2021021984 W JP2021021984 W JP 2021021984W WO 2021256355 A1 WO2021256355 A1 WO 2021256355A1
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- robot
- torque
- torque sensor
- control device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J13/00—Controls for manipulators
- B25J13/08—Controls for manipulators by means of sensing devices, e.g. viewing or touching devices
- B25J13/081—Touching devices, e.g. pressure-sensitive
- B25J13/084—Tactile sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J13/00—Controls for manipulators
- B25J13/08—Controls for manipulators by means of sensing devices, e.g. viewing or touching devices
- B25J13/085—Force or torque sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/02—Sensing devices
- B25J19/04—Viewing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1602—Program controls characterised by the control system, structure, architecture
- B25J9/1605—Simulation of manipulator lay-out, design, modelling of manipulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Program-controlled manipulators
- B25J9/16—Program controls
- B25J9/1674—Program controls characterised by safety, monitoring, diagnostic
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/40—Robotics, robotics mapping to robotics vision
- G05B2219/40599—Force, torque sensor integrated in joint
Definitions
- the present invention relates to a robot provided with a joint arm, and more particularly to a robot having a torque sensor in the joint arm.
- Patent Document 1 describes an image of a joint arm of a robot captured by a camera and an icon of a torque detected by torque detection provided in the joint arm being displayed on a display unit.
- the torque sensor that detects the torque received from the outside by the joint arm of the robot usually includes an error within an allowable range from the manufacturing stage, and the value of the output torque has an offset.
- the value of the offset amount may increase as the deterioration occurs due to the usage time of the torque sensor. Therefore, conventionally, as a product specification of the torque sensor, an allowable value of the torque offset amount is determined in advance, and the torque sensor is replaced when the offset amount detected by the user exceeds the allowable value.
- the robot control device of the present disclosure is a robot control device equipped with a sensor that detects an external force torque around a joint, and is assembled with a deteriorated torque sensor together with 3D graphics of the robot body. It is a robot control device equipped with a display device that displays a warning icon in color at a location and changes the color according to the degree of deterioration.
- the user can intuitively grasp information on which joint of the joint arm of the robot and how much the torque sensor has deteriorated.
- FIG. 1 is a configuration diagram of a robot system common to each embodiment of the present disclosure.
- the robot 1 shown in FIG. 1 is an articulated robot in which an articulated arm 10 such as a 6-axis vertical articulated robot or a 4-axis vertical articulated robot extends from the body 11.
- the articulated arm 10 is moved by a servomotor 12 (FIG. 2) built in the robot 1 so as to be associated with each joint, and the articulated arm 10 lifts and moves an object, or It receives torque from the outside by coming into contact with other members.
- the torque received from the outside is distributed to each joint of the articulated arm 10 according to the form of the articulated arm 10 at that time and the direction of the received torque.
- Each joint of the articulated arm 10 is provided with torque sensors 101, 102, 103 so that the torque received by each joint can be detected (measured).
- the control device 2 controls the operation of the robot 1 and also controls the display contents of the display device 3.
- An operation command of the robot 1 created by the control device 2 is given to the robot 1, and a servomotor 12 (FIG. 2) built in the robot 1 is operated to move the articulated arm 10 to perform various operations.
- the output values from the torque sensors 101, 102, 103 arranged in each joint of the articulated arm 10 are sent to the control device 2 for processing, and the resulting data is sent to the display device 3 for display.
- FIG. 2 is a block line showing a signal transfer relationship between the control device 2 and the robot 1, between the control device 2 and the display device 3, and inside each of the robot 1, the control device 2, and the display device 3. It is a figure.
- the control device 2 includes a processing unit (CPU) 21 including a microprocessor and the like, a storage unit 22 including memory members such as RAM, ROM, EEPROM, and flash memory, and a transmission / reception unit 23.
- the articulated arm movement teaching unit 213 and the servomotor operating amount calculation unit 214 in the processing unit 21 of the control device 2 calculate the operating amount (rotation number) of each servomotor 12 from the teaching data of the movement of the articulated arm 10.
- Each servomotor 12 of the robot 1 operates in response to an operation command from the control device 2, and feeds back data (rotational speed) of the operation result to the control device 2 via the transmission / reception device 13 of the robot 1. Further, the output data of the torque sensors 101, 102, 103 arranged in each joint of the articulated arm 10 of the robot 1 is sent to the control device 2 via the transmission / reception device 13 of the robot 1.
- the torque sensor offset amount calculation unit 211 calculates the torque sensor offset amount using the output data sent from the torque sensors 101, 102, 103 of the robot 1. Then, the torque sensor deterioration degree determination unit 212 determines the color indicating the deterioration degree of each torque sensor displayed on the display device 3 based on the calculated torque sensor offset amount.
- each torque sensor sent from the robot 1 to the control device 2 The output value of each torque sensor sent from the robot 1 to the control device 2, the torque sensor offset amount calculated by the torque sensor offset amount calculation unit 211 of the processing unit 21 of the control device 2, and the processing unit 21 of the control device 2.
- Each data about the result determined by the torque sensor deterioration degree determination unit 212 is sent to the display device 3 via the transmission / reception unit 23.
- Each data sent to the display device 3 is sent to the display unit 31 via the transmission / reception unit 32, and is based on the data sent in the torque value display unit 311 and the torque sensor deterioration degree display unit 312 of the display unit 31. Is displayed.
- the method for identifying the offset amount is to identify from the data of the arm position and the output torque of the torque sensor acquired at a plurality of places by moving only one axis (one arm) of the articulated arm 10 of the robot 1. .. Specifically, each operation / calculation is performed as follows.
- FIG. 3 shows one example of identification of D using the acquired data of ⁇ and T using this equation as a model.
- each of ⁇ indicates the acquired data of ⁇ and T, and the offset amount D in which the horizontal line ( ⁇ ) is identified.
- FIG. 4 shows an example of identifying an arm to which torque due to gravity is not applied.
- each torque sensor 101, 102, 103 is determined by performing a self-test periodically separately from the operation of the robot in normal operation. In the self-test, each arm is moved independently, and the arm positions (angles) and the output torque of the torque sensor are recorded at multiple locations. The values of those recorded data are substituted into the above equation (2), and the offset amount of each torque sensor 101, 102, 103 is calculated by the least squares method.
- FIG. 5 shows an example of a graph in which the offset amount is recorded in a graph showing the criteria of warning and caution.
- each torque sensor 101, 102, 103 is shown in the outline view of the main body (articulated arm 10 and body 11) of the robot 1. Since it is displayed, it is necessary to grasp the positions of the torque sensors 101, 102, and 103 in the robot 1 main body.
- the positions of the torque sensors 101, 102, and 103 are design information and are known. Then, it is also stored as a parameter related to the mechanism in the control software stored in the storage unit 22 of the control device 2.
- Each arm in the articulated arm 10 of the robot 1 has a coordinate system, and the positions of the torque sensors 101, 102, and 103 are represented by the coordinates of those coordinate systems.
- the position of each arm in the articulated arm 10 is also known information in the control software, and the location where each torque sensor 101, 102, 103 is assembled in each arm is also stored in the control software. Therefore, the position of each torque sensor 101, 102, 103 with respect to the outline view of the robot 1 can be displayed on the torque sensor deterioration degree display unit 312 of the display unit 31 of the display device 3.
- the torque offset amount is detected (measured) for each of the torque sensors 101, 102, 103.
- the offset amount of the torque of the torque sensor 101 is smaller than the threshold value of the caution level, it is determined that the deterioration degree has not reached the caution level, and in that case, no particular display is made. That is, the warning icon is not displayed at the position of the torque sensor 101 on the figure of the robot 1.
- the torque offset amount of the torque sensor 102 is equal to or higher than the caution level threshold value and smaller than the warning level threshold value, the deterioration degree has not reached the warning level but has reached the caution level.
- the warning icon is displayed in yellow at the position of the torque sensor 102 on the figure of the robot 1. Further, for example, when the torque offset amount of the torque sensor 103 is equal to or higher than the warning level threshold value and a warning is given, it is determined that the deterioration degree has reached the warning level. In that case, the figure of the robot 1 The warning icon is displayed in red in color at the position of the torque sensor 103 above.
- Examples of the embodiment of the figure of the robot 1 displayed on the display device 3 include the 3D graphics of the robot 1 and the form of the captured image of the robot 1.
- FIG. 6 shows a figure in which the captured image of the robot 1 is adopted as the form of the figure of the robot 1.
- a warning icon is displayed at the position of the torque sensor.
- the upper warning icon is displayed in yellow, for example, and the lower warning icon is displayed in red, for example.
- FIG. 7 the procedure for displaying the degree of deterioration of the torque sensor in the present disclosure is shown in FIG. 7 as a flow chart.
- the user first, apart from the normal operation operation, the user performs an operation of moving only one axis (one arm) of the articulated arm 10 of the robot 1 a plurality of times (step ST1).
- the torque sensor offset amount calculation unit 211 of the processing device 21 of the control device 2 calculates the torque offset amount of each torque sensor 101, 102, 103 (step ST2).
- the degree of deterioration of each torque sensor 101, 102, 103 is determined from the calculated torque offset amount of each torque sensor 101, 102, 103, and the determination result is displayed. Specifically, a color icon is displayed at the position of each torque sensor 101, 102, 103 on the outline drawing of the robot 1 on the torque sensor deterioration degree display unit 312 of the display unit 31 of the display device 3, and the display color thereof. Displays the degree of deterioration.
- step ST3 it is determined whether the calculated torque offset amount of each of the torque sensors 101, 102, 103 does not exceed the caution level threshold value and is smaller than the caution level threshold value. .. If the determination result is YES, that is, if the offset amount is smaller than the threshold value of the attention level, it is determined that the deterioration degree has not reached the attention level, and the determined torque sensors 101, 102, 103 of the robot The color icon is not displayed at the position on the outline drawing of No. 1 (step ST4). And this flow ends.
- step ST3 determines whether the offset amount is equal to or greater than the threshold value of the caution level. If the determination result in step ST3 is NO, that is, if the offset amount is equal to or greater than the threshold value of the caution level, then the calculated torque offset amount of each torque sensor 101, 102, 103 is determined. It is determined whether the warning level threshold value is not exceeded and is smaller than the warning level threshold value (step ST5).
- step ST5 determines whether the offset amount is smaller than the threshold value of the warning level. If the determination result in step ST5 is YES, that is, if the offset amount is smaller than the threshold value of the warning level, the degree of deterioration is determined to be at the caution level although it has not reached the warning level.
- a yellow color icon is displayed at the position of the torque sensors 101, 102, and 103 on the outline drawing of the robot 1 (step ST6). And this flow ends.
- step ST5 determines whether the offset amount is equal to or greater than the warning level threshold value, the deterioration degree is determined to exceed the warning level, and the determined torque sensors 101, 102, 103. A red color icon is displayed at that position on the outline drawing of the robot 1 (step ST7). And this flow ends.
- the user displays information on which joint of the joint arm of the robot and how much the torque sensor has deteriorated by displaying a color icon on the outline drawing of the robot. Depending on the color, it can be grasped at first glance and sensuously.
- the outline of the robot various forms such as 3D graphics of the robot and captured images of the robot can be selected, and the user can easily see the outline of the robot according to the form of the robot and the characteristics of the display device.
- the position of the torque sensor deteriorated in the form and the degree of deterioration thereof can be known at a glance.
- a transparent display can be selected in addition to a normal liquid crystal display or organic EL display, and the position of the torque sensor deteriorated in an easy-to-see display state and the position of the torque sensor according to the environment in which the robot is used. You can see the degree of deterioration at a glance.
- Robot 10 Articulated arm 101, 102, 103 Torque sensor 11 (Robot) body 12 Servo motor 13 (Robot) transmitter / receiver 2 Control device 21 Processing unit 211 Torque sensor offset amount calculation unit 212 Torque sensor deterioration degree determination unit 213 Articulated arm movement teaching unit 214 Servo motor operation calculation unit 22 Storage unit 23 (control device) transmission / reception unit 3 Display device 31 Display unit 311 Torque value display unit 312 Torque sensor deterioration degree display unit 33 (display device) transmission / reception unit
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- Engineering & Computer Science (AREA)
- Robotics (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Automation & Control Theory (AREA)
- Manipulator (AREA)
Abstract
Description
[数1]
T=M・sin(θ+α)+D ・・・・・式(1)
ここで、Mはそのアームに掛かる重力トルクの最大値、αはアームの重心位置等に応じた位相のオフセットである。
[数2]
T=M1・sinθ+M2・cosθ+D ・・・・・式(2)
ここで、M1=M・cosα、M2=M・sinαである。この式をモデルとして、取得したθ,Tのデータを使ったDの同定の1つの例を図3に示す。図3のグラフにおいて、〇の1つ1つが、取得したθ,Tのデータ、横線(-)が同定されたオフセット量Dを示す。また、同定例として、重力によるトルクが掛からないアームについて同定した例を図4に示す。
10 多関節アーム
101,102,103 トルクセンサ
11 (ロボットの)胴体
12 サーボモータ
13 (ロボットの)送受信装置
2 制御装置
21 処理ユニット
211 トルクセンサオフセット量算出部
212 トルクセンサ劣化度判定部
213 多関節アーム移動教示部
214 サーボモータ作動算出部
22 記憶ユニット
23 (制御装置の)送受信ユニット
3 表示装置
31 表示部
311 トルク値表示部
312 トルクセンサ劣化度表示部
33 (表示装置の)送受信部
Claims (5)
- 関節まわりの外力トルクを検知するトルクセンサを備えたロボットの制御装置であって、
前記ロボットの本体の3Dグラフィックスと共に、劣化した前記トルクセンサの組付箇所に警告アイコンをカラー表示し、劣化度合いに応じてその色を変更させる、表示装置を備えた、
ロボット制御装置。 - 関節まわりの外力トルクを検知するトルクセンサを備えたロボットの制御装置であって、
実物の前記ロボットの本体の撮影画像と共に、劣化した前記トルクセンサの組付箇所に警告アイコンをカラー表示し、劣化度合いに応じてその色を変更させる、表示装置を備えた、
ロボット制御装置。 - 関節まわりの外力トルクを検知するトルクセンサを備えたロボットを視野に捉えた際に、
前記ロボットの劣化した前記トルクセンサの組付箇所に相当する透明ディスプレイ上の投影位置に、警告アイコンをカラー表示し、劣化度合いに応じてその色を変更させる、拡張現実表示デバイスを備えた、
ロボット制御装置。 - 前記劣化度合いは、前記ロボットの1軸のみを動かして複数個所で取得した、アームの角度位置と前記トルクセンサの出力トルクのデータから同定した前記トルクセンサのオフセット量に基づいて判別する、
請求項1~3のいずれかに記載されたロボット制御装置。 - 前記トルクセンサのオフセット量は、前記アームの角度位置θを変化させて出力トルクTを測定し、複数組の前記アームの角度位置θ、出力トルクTを記録し、前記アームの角度位置θ、出力トルクT及び前記トルクセンサのオフセット量Dの関係を表す次の式(1)を用いて、最小二乗法により、前記トルクセンサのオフセット量Dを求めるものである、
請求項4に記載されたロボット制御装置。
[数1]
T=M・sin(θ+α)+D ・・・・・・ 式(1)
ここで、Mは前記アームに掛かる重力トルクの最大値、αは前記アームの重心位置に応じた位相のオフセットである。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112021003252.6T DE112021003252T5 (de) | 2020-06-16 | 2021-06-09 | Roboter-Steuervorrichtung |
| CN202180042535.3A CN115916488A (zh) | 2020-06-16 | 2021-06-09 | 机器人控制装置 |
| JP2022531726A JP7392149B2 (ja) | 2020-06-16 | 2021-06-09 | ロボット制御装置 |
| US17/906,574 US12275133B2 (en) | 2020-06-16 | 2021-06-09 | Robot control device |
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| JP2020103676 | 2020-06-16 | ||
| JP2020-103676 | 2020-06-16 |
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| US (1) | US12275133B2 (ja) |
| JP (1) | JP7392149B2 (ja) |
| CN (1) | CN115916488A (ja) |
| DE (1) | DE112021003252T5 (ja) |
| WO (1) | WO2021256355A1 (ja) |
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| DE112021003252T5 (de) * | 2020-06-16 | 2023-04-06 | Fanuc Corporation | Roboter-Steuervorrichtung |
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| JP7522340B2 (ja) * | 2020-07-01 | 2024-07-25 | 株式会社デンソーウェーブ | ロボット用状態表示装置及び産業用ロボット |
| JP2023003731A (ja) * | 2021-06-24 | 2023-01-17 | キヤノン株式会社 | 情報処理装置、情報処理方法、表示装置、表示方法、ロボットシステム、物品の製造方法、プログラム及び記録媒体 |
| US12600035B2 (en) * | 2022-07-05 | 2026-04-14 | Canon Kabushiki Kaisha | Information processing method, information processing apparatus, robot system, manufacturing method of product, and storage medium |
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2021
- 2021-06-09 DE DE112021003252.6T patent/DE112021003252T5/de active Pending
- 2021-06-09 CN CN202180042535.3A patent/CN115916488A/zh active Pending
- 2021-06-09 JP JP2022531726A patent/JP7392149B2/ja active Active
- 2021-06-09 WO PCT/JP2021/021984 patent/WO2021256355A1/ja not_active Ceased
- 2021-06-09 US US17/906,574 patent/US12275133B2/en active Active
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| JP2011131335A (ja) * | 2009-12-24 | 2011-07-07 | Tadano Ltd | 作業機械の操作支援装置 |
| JP2012014295A (ja) * | 2010-06-29 | 2012-01-19 | Mitsubishi Heavy Ind Ltd | 部品検索装置及び部品検索用コンピュータプログラム |
| JP2014201307A (ja) * | 2013-04-02 | 2014-10-27 | ザ・ボーイング・カンパニーTheBoeing Company | 3次元視覚化のためのロケータシステム |
| JP2016146209A (ja) * | 2013-12-25 | 2016-08-12 | 株式会社テイエルブイ | プロセスシステムの管理システム、サーバ装置、管理プログラム及び管理方法 |
| JP2016085501A (ja) * | 2014-10-23 | 2016-05-19 | 横河電機株式会社 | 計装システム支援装置 |
| WO2016155787A1 (en) * | 2015-03-31 | 2016-10-06 | Abb Technology Ltd | A method for controlling an industrial robot by touch |
| JP2018040621A (ja) * | 2016-09-06 | 2018-03-15 | 株式会社日立ハイテクノロジーズ | 自動分析装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112021003252T5 (de) | 2023-04-06 |
| US20230131173A1 (en) | 2023-04-27 |
| US12275133B2 (en) | 2025-04-15 |
| JP7392149B2 (ja) | 2023-12-05 |
| CN115916488A (zh) | 2023-04-04 |
| JPWO2021256355A1 (ja) | 2021-12-23 |
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