WO2022008592A1 - Emergency stop device - Google Patents
Emergency stop device Download PDFInfo
- Publication number
- WO2022008592A1 WO2022008592A1 PCT/EP2021/068829 EP2021068829W WO2022008592A1 WO 2022008592 A1 WO2022008592 A1 WO 2022008592A1 EP 2021068829 W EP2021068829 W EP 2021068829W WO 2022008592 A1 WO2022008592 A1 WO 2022008592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- devices
- level
- emergency stop
- stop device
- selection
- Prior art date
Links
Classifications
-
- 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
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
Definitions
- the present invention relates to an emergency stop device of a system which has a number of devices which are controlled by a common control unit.
- the general safety integrity i.e. the sufficient independence from safety-relevant measures of electronic control units, can be guaranteed by the 3-level safety concept according to the ISO 26262 standard.
- the first level serves as a functional level
- the second level serves as a security level, which monitors the first level
- the third level ensures the integrity of the second level.
- a control device can be used, for example, to control different actuators, for example vehicle engines such as ship engines, engines of agricultural machinery or engines of work machines.
- the motors are supplied with electrical power via the control unit.
- emergency stop switches are provided which interrupt the electrical energy supply of the control unit. This also immediately interrupts the electrical energy supply to the motor and thus to all electrically operated devices in the motor.
- the emergency stop device of a system which has a number of devices that are controlled by a common control device, can be used in particular for the controlled shutting down of an engine, such as a ship's engine. If such a ship's engine is stopped by means of a conventional emergency stop switch by interrupting the electrical energy supply to its control device, this leads to an immediate shutdown of all electrically operated devices of this ship's engine. If, for example, this causes its throttle valve to return to its original position, it can make it impossible to restart the ship's engine. In addition, it is no longer possible to read data from the individual devices if the control unit is no longer supplied with electrical energy.
- the EMERGENCY STOP facility is therefore designed to turn off only a selection of the devices, not turning off the controller.
- the control unit is preferably a control unit with a 3-level security concept, in particular a 3-level security concept according to the ISO 26262 standard
- a selection function that is set up to make the selection from the devices depending on the operating states of the devices when the emergency stop device is actuated. Depending on the operating states of the devices, it can be decided which devices may be disconnected from the energy supply and which must continue to be supplied with electrical energy. If the first level fails in the selection, this function can also be taken over by the second level.
- the first level as a functional level, has the task of controlling the devices and supplying them with electrical energy, it has control connections to the devices. These control connections are preferably set up so that the selection from the devices can also be switched off. As long as a selection from the devices is provided in the first level, either in that it is generated in the first level itself or, if the selection in the first level fails, the first level is made available by the second level, a individual devices can be switched off selectively without having to provide additional electrical connections or data connections for this purpose.
- the second level is connected to a module of the third level, which has at least one switch-off connection to the devices, which is set up to switch off a selection from the devices.
- This shutdown connection can be used if it is not possible to send the shutdown signal via the control connections. It can also be used if the first level shows such severe functional failures that not only can it no longer select the devices itself, but it can also no longer receive a selection from the second level. In this case, after the selection has been generated in the second level, it can perform the shutdown directly via the shutdown connection.
- the use of a module on the third level is preferred here because the 3-level security concept provides a hardware error management module (EMM) on the third level. This can be used to advantage for switching off, since hardware-specific functions are already implemented in it.
- EMM hardware error management module
- a permanently specified selection from the devices is stored in the third level.
- the last fallback option in the third level is this fixed one Selection from the devices are used, which includes those devices that must be switched off to avert danger in any case.
- the permanently specified selection from the devices is stored in a third-level monitoring module.
- this is located in a hardware unit that is separated from the rest of the control unit by hardware and software mechanisms and is therefore particularly well protected against impairments that could affect other parts of the control unit.
- the third level preferably has at least one switch-off connection to the devices, which is set up to switch off the selection from the devices stored in the third level.
- This separate switch-off connection which does not run through the first and second levels, also enables the emergency stop to be particularly reliable in the event of danger.
- the cut-off connection of the third level is partially routed via a common line with the cut-off connection of the second level.
- FIG. 1 shows a system according to the prior art, which has an emergency stop device.
- FIG. 2 shows an embodiment of an emergency stop device according to the invention.
- FIG. 1 shows a conventional emergency stop device 10 in the form of an emergency stop switch, which is provided for switching off a system 20.
- the system 20 has a control device 31 with a hardware module 32 . It has a safety concept with three levels 40, 50, 60 according to the ISO 26262 standard. By actuating the emergency stop device 10, this interrupter switch 34 is opened, so that the control unit 31 is no longer supplied with electrical energy.
- the controller 31 controls a diesel engine that drives a ship.
- This diesel engine has devices 71 to 74 in the form of a metering unit 71 for the high-pressure pump of the diesel engine, a throttle valve 72, an air valve 73 arranged in front of the throttle valve and an injection driver 74.
- a functional module 41 in the first level 40 controls these devices 71 to 74 via control lines 81. These are shown in FIG. 1 as a single connection for the sake of simplicity. In fact, however, four control lines 81 are provided, so that each of the devices 71 to 74 is connected to a separate control line 81 . Control lines 81 also provide electrical power to devices 71-74. The actuation of the emergency stop device 10 therefore leads not only to the failure of the control unit 31 and its hardware module 32, but also to the failure of all the devices 71 to 74.
- a security module 51 is provided in the second level 50 that monitors the functional module 41 .
- a memory test module 61 that carries out memory tests of the second level 50 and the third level 60 is arranged in the third level 60 .
- a configuration test module 62 monitors the hardware configuration of the second level 50 and the third level 60.
- a hardware test module 63 monitors additional hardware modules of the control unit 31. Data from the memory test module 61, the configuration test module 62 and the hardware test module 63 are collected by a PFC (Program Flow Check) module . This also exchanges data with the security module 51 of the second level 50 .
- PFC Program Flow Check
- a monitoring module 65 in the hardware module 32 which is structurally dated remaining control unit 31 is separate, but forms part of the third level 60, can send requests to the memory test module 61, the configuration test module 62 and the hardware test module 63 as well as to the security module 51 of the second level 50. After the responses from these modules 51, 61, 62, 63 have been collected by the PFC module 64, they can be passed to the monitoring module 65, which in this way ensures the integrity of the second level 50. Furthermore, a safety mechanism 66 for a hardware memory test in the form of an ECC (Error Code Correction) and an EMM (Hardware Error Management Module) 67 are provided on the third level.
- ECC Error Code Correction
- EMM Hardware Error Management Module
- FIG. 10 An emergency stop device 10 according to an exemplary embodiment of the invention is shown in FIG. In this embodiment, the interrupt switch 34 is omitted. Instead, the emergency stop device 10 sends an emergency stop request via two redundant lines to the function module 41 of the first level 40 and the safety module 51 of the second level 50. In the function module 41, based on the operating states of the devices 71 to 74, a decision is made as to which of the devices 71 to 74 must be switched off and which can continue to run safely. Based on this selection, the selected devices are then switched off via the control connections 81.
- the safety module 51 Since the safety module 51 also receives the emergency stop request, it reproduces the selection from the devices 71 to 74 running in the function module 41 and corrects any errors that may occur in the first level 40 in the selection. If the error correction or the sending of shutdown requests via the control connections 81 fails, the security module 51 instead forwards the shutdown requests it has selected to the EMM 67 of the third level 60 via a shutdown module 52 of the second level 50 . This is connected to an output of the control lines 81 to 84 via a switch-off connection 82 in the form of a wire connection, which is not provided in the conventional system, in the control unit 31 and can switch off the devices 71 to 74 in accordance with the switch-off request.
- the monitoring module 65 accesses a selection of the devices 71 to 74 that is permanently stored in it and which specifies in the form of a list which of the devices 71 to 74 are to be switched off if all other switch-off paths fail. In the present exemplary embodiment, this list only provides for switching off the injection driver 74, for example. This switch-off request is sent via a further switch-off connection 83 to the
- Emergency stop device 10 active. They continue to provide data about the devices 71 to 74 and allow the entire system 20 to be quickly restarted once the emergency stop request has been removed.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023501055A JP2023533532A (en) | 2020-07-08 | 2021-07-07 | Emergency stop device |
KR1020237004582A KR20230036140A (en) | 2020-07-08 | 2021-07-07 | emergency stop device |
CN202180048599.4A CN115803690A (en) | 2020-07-08 | 2021-07-07 | Emergency stop device |
EP21743101.4A EP4179392A1 (en) | 2020-07-08 | 2021-07-07 | Emergency stop device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020208577.3 | 2020-07-08 | ||
DE102020208577.3A DE102020208577A1 (en) | 2020-07-08 | 2020-07-08 | emergency stop device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022008592A1 true WO2022008592A1 (en) | 2022-01-13 |
Family
ID=76971855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/068829 WO2022008592A1 (en) | 2020-07-08 | 2021-07-07 | Emergency stop device |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP4179392A1 (en) |
JP (1) | JP2023533532A (en) |
KR (1) | KR20230036140A (en) |
CN (1) | CN115803690A (en) |
DE (1) | DE102020208577A1 (en) |
WO (1) | WO2022008592A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN205891232U (en) * | 2016-07-08 | 2017-01-18 | 上海工程技术大学 | Urgent safe launching appliance of four rotor unmanned aerial vehicle |
WO2017149039A1 (en) * | 2016-03-04 | 2017-09-08 | Ge Aviation Systems Limited | Method and apparatus for modular power distribution |
CN107352025A (en) * | 2017-07-26 | 2017-11-17 | 安徽云翼航空技术有限公司 | A kind of multipurpose captive unmanned plane |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014213206B4 (en) | 2014-07-08 | 2022-03-17 | Vitesco Technologies GmbH | Control arrangement for safety-related actuators |
DE102019125867B4 (en) | 2019-09-25 | 2022-05-05 | Keba Industrial Automation Germany Gmbh | Programmable electronic power controller |
-
2020
- 2020-07-08 DE DE102020208577.3A patent/DE102020208577A1/en active Pending
-
2021
- 2021-07-07 CN CN202180048599.4A patent/CN115803690A/en active Pending
- 2021-07-07 KR KR1020237004582A patent/KR20230036140A/en unknown
- 2021-07-07 JP JP2023501055A patent/JP2023533532A/en active Pending
- 2021-07-07 WO PCT/EP2021/068829 patent/WO2022008592A1/en unknown
- 2021-07-07 EP EP21743101.4A patent/EP4179392A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017149039A1 (en) * | 2016-03-04 | 2017-09-08 | Ge Aviation Systems Limited | Method and apparatus for modular power distribution |
CN205891232U (en) * | 2016-07-08 | 2017-01-18 | 上海工程技术大学 | Urgent safe launching appliance of four rotor unmanned aerial vehicle |
CN107352025A (en) * | 2017-07-26 | 2017-11-17 | 安徽云翼航空技术有限公司 | A kind of multipurpose captive unmanned plane |
Also Published As
Publication number | Publication date |
---|---|
DE102020208577A1 (en) | 2022-01-13 |
KR20230036140A (en) | 2023-03-14 |
EP4179392A1 (en) | 2023-05-17 |
JP2023533532A (en) | 2023-08-03 |
CN115803690A (en) | 2023-03-14 |
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