CN-121995868-A - Process island and safety control method

CN121995868ACN 121995868 ACN121995868 ACN 121995868ACN-121995868-A

Abstract

The invention relates to a process island and a safety control method, wherein the method comprises the steps of collecting position information of personnel in the process island, dividing the process island into a plurality of risk areas, matching related target risk areas according to the position information of the personnel, determining target risk levels of the personnel according to a corresponding relation between the pre-established risk areas and the risk levels, and controlling an intelligent transportation trolley and automatic equipment in the process island to stop running and trigger a risk alarm signal if the target risk levels are the risk levels. The invention can effectively avoid personnel from entering the process island along with personnel when the intelligent transportation trolley enters the process island and the safety grating fails, thereby causing personnel safety problems.

Inventors

LV JUNCHENG
LI YUZHEN
ZHANG RUIJING
ZHANG LI
HAN JINGWEN

Assignees

上汽通用五菱汽车股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251222

Claims (11)

1. A process island safety control method, the method comprising: collecting position information of personnel in a process island, wherein the process island is divided into a plurality of risk areas; matching the associated target risk areas according to the position information of the personnel; determining a target risk level of the personnel according to a pre-established corresponding relation between the risk area and the risk level; And if the target risk level is a risk level, controlling the intelligent transportation trolley and the automation equipment in the process island to stop running, and triggering a risk alarm signal.
2. The method of claim 1, wherein prior to the collecting the location information of personnel within the process island, the method further comprises: When an island entering instruction of the intelligent transportation trolley aiming at the process island is acquired and a PS switch at the entrance of the process island triggers state switching, judging that the running state of the intelligent transportation trolley is in an island entering state; When an island-out instruction of the intelligent transportation trolley aiming at the process island is obtained and a PS switch at the outlet of the process island triggers state switching, judging that the running state of the intelligent transportation trolley is in the island-out state; When the running state of the intelligent transportation trolley is in or out of the island, shielding the safety grating of the process island, and starting a camera electronic fence, wherein the camera electronic fence is used for acquiring the position information of personnel in the process island.
3. The method according to claim 2, wherein the method further comprises: When the running state of the intelligent transportation trolley is judged to be in an island, starting passing timing; And when the timing time is longer than a preset passing time threshold, and the intelligent transportation trolley is not detected to leave the island, judging that the intelligent transportation trolley passes out overtime, triggering overtime alarm and uploading a passing overtime event.
4. The method of claim 1, wherein the risk areas include at least a hazard zone, a warning zone, and a safety zone, and wherein the method of partitioning the risk areas within the process island comprises: adding a preset first safety protection distance to the motion range of the automation equipment in the process island, and determining the operation area of each automation equipment; Adding a preset second safety protection distance to a passing path of the intelligent transportation trolley in the process island, and determining an operation area of the intelligent transportation trolley; Determining a union of an operation area of each automation device, an operation area of the intelligent transportation trolley and a preset forbidden area as the dangerous area; Taking a preset third safety protection distance as the area width of a warning area, and setting the warning area outside the dangerous area; and determining a preset personnel allowed stay area as the safety area.
5. The method of claim 1, wherein said matching associated risk areas based on the location information of the person comprises: arranging the position information of the personnel into continuous position information according to a time sequence; According to the continuous position information, determining the real-time position of the personnel and the displacement trend of the adjacent sampling time, wherein the displacement trend comprises the displacement direction and the displacement rate of the personnel; Determining a target risk area to which the real-time position of the person belongs according to the corresponding relation between the real-time position of the person and the boundary ranges of the plurality of risk areas; when the displacement direction of the person points to a first risk area, and according to the displacement rate of the person, determining that the person will reach the first risk area after a preset tolerance time, judging that the person has a trend of entering the first risk area, and determining the first risk area as a target risk area of the person.
6. The method according to claim 1, wherein the method further comprises: when the target risk level of the personnel is a warning level, warning information is sent to the personnel to warn the personnel to leave the process island; When personnel with the target risk level of the dangerous level exist in the process island or personnel with the target risk level of the warning level and the dangerous level exist simultaneously, controlling the intelligent transportation trolley and the automation equipment in the process island to stop running, and triggering a dangerous alarm signal; And when the target risk level is reduced from the danger level to the warning level or the safety level, the intelligent transportation trolley and the automation equipment are restored to operate.
7. The method of claim 6, wherein said controlling the intelligent transportation cart and the automation equipment within the process island to cease operation further comprises: Acquiring the position information of the personnel, and acquiring the position information of each automation device and the intelligent transportation trolley in the process island; Calculating the distance between the personnel and each of the automation equipment and the intelligent transportation trolley according to the position information of the personnel, the position information of the respective automation equipment and the position information of the intelligent transportation trolley; and for each distance, if the distance is smaller than a preset safety distance threshold, controlling the automation equipment or the intelligent transportation trolley corresponding to the distance to stop running.
8. A process island is characterized by comprising a camera, a safety grating, a PS switch, a risk area, an alarm device and a control cabinet, wherein the risk area comprises a danger area, a warning area and a safety area, The camera is used for collecting the position information of personnel in the process island; the safety grating is arranged at the outlet and the inlet of the process island and is used for detecting the shielding state of the outlet and the inlet of the process island; the PS switch is arranged at the outlet and the inlet of the process island and is used for triggering state switching when the intelligent transportation trolley passes by to generate an island in/out identification signal; the alarm device is used for providing an alarm signal; The control cabinet is in communication connection with the camera, the safety grating, the PS switch, the alarm and the intelligent transportation trolley, and is used for realizing the process island safety control method according to any one of claims 1-7.
9. The process island of claim 8 further comprising mechanical fences, security gates and gate boxes, wherein, The mechanical fence is arranged outside the process island and is used for providing physical isolation for the process island; the safety door and the door box are arranged on the mechanical fence and are used for providing a controlled personnel passing entrance and performing temporary locking to prevent personnel from entering the process island when the process island is in an automatic running state.
10. The process island of claim 8 further comprising a safety control network architecture, wherein the architecture comprises a control system, a personnel detection network, an intelligent transportation cart communication network, and an alarm interaction network, wherein, The personnel detection network is used for processing the area in the process island to divide a risk area, acquiring the position information of personnel in the process island through a camera, determining the identification result of the risk area of the personnel, and sending the identification result to the control system; The intelligent transportation trolley communication network is used for receiving an island entering/exiting identification signal generated by a PS switch at the entrance or the exit of a process island and accessing the island entering/exiting identification signal into the control system; The alarm interaction network is used for driving the alarm device to generate an alarm signal through an alarm instruction output by the control system; the control system is used for receiving a risk area identification result from the personnel detection network, determining personnel risk levels in the process island, outputting an alarm instruction to the alarm interaction network when the risk levels are detected, and controlling automatic equipment and the intelligent transportation trolley in the process island to stop running; The control system is also used for receiving an island entering/exiting identification signal from the intelligent transportation trolley communication network and controlling the safety grating shielding of the process island.
11. The process island of claim 10 wherein the control system comprises a first communication network, a second communication network, and a third communication network constructed based on ETHERNET IP protocols, wherein, The first communication network is used for being connected with the personnel detection network; the second communication network is used for carrying out two-way communication with the intelligent transportation trolley communication network, the automation equipment and the dispatching server of the intelligent transportation trolley and controlling the intelligent transportation trolley to run; The third communication network is used for communicating with the alarm interaction network and outputting an alarm instruction; The first communication network, the second communication network and the third communication network are respectively established through different physical communication interfaces of the control system and are respectively configured in different network subnets and broadcast domains.

Description

Process island and safety control method Technical Field The invention relates to the technical field of vehicle manufacturing, in particular to a process island and a safety control method. Background Currently, in an island production line, in order to ensure that an intelligent transportation trolley can smoothly enter a process island (manufacturing process production area), an entrance of the process island is usually reserved in space according to the largest vehicle type or the outline dimension of a largest transportation carrier, and a safety grating is arranged at the entrance position so as to protect the entrance of personnel or objects. When the intelligent transportation trolley enters and exits the process island, the safety grating judges whether personnel or obstacles exist at the entrance or not by detecting whether the light beam is blocked or not, and accordingly safety control is triggered. However, in order to avoid frequent false triggering of the safety grating during normal passing of the intelligent transportation trolley, the safety grating needs to be shielded when the intelligent transportation trolley enters and exits the process island so as to ensure continuous running of the trolley. However, when producing a car type or a narrow car body product, since the entrance and exit of the process island are reserved according to the largest car type, the intelligent transportation car easily forms a larger safety gap at the entrance and exit when entering and exiting the process island, and personnel have the possibility of entering the process island along with the intelligent transportation car or entering the process island in parallel with the intelligent transportation car. At this time, the safety grating which is simply dependent on the positions of the exit and the entrance is difficult to timely and accurately identify the entrance behaviors of the personnel, the safety risk of personnel entering the process island by mistake exists, and as the safety grating does not identify the entrance of the personnel, effective safety measures cannot be adopted for the entering personnel, and personnel safety accidents are easy to occur. Disclosure of Invention Accordingly, it is desirable to provide a process island and a safety control method for the above-mentioned problems. In a first aspect, a process island safety control method is provided, the method comprising: collecting position information of personnel in a process island, wherein the process island is divided into a plurality of risk areas; matching the associated target risk areas according to the position information of the personnel; determining a target risk level of the personnel according to a pre-established corresponding relation between the risk area and the risk level; And if the target risk level is a risk level, controlling the intelligent transportation trolley and the automation equipment in the process island to stop running, and triggering a risk alarm signal. As an alternative embodiment, before the collecting the position information of the personnel in the process island, the method further includes: When an island entering instruction of the intelligent transportation trolley aiming at the process island is acquired and a PS switch at the entrance of the process island triggers state switching, judging that the running state of the intelligent transportation trolley is in an island entering state; When an island-out instruction of the intelligent transportation trolley aiming at the process island is obtained and a PS switch at the outlet of the process island triggers state switching, judging that the running state of the intelligent transportation trolley is in the island-out state; When the running state of the intelligent transportation trolley is in or out of the island, shielding the safety grating of the process island, and starting a camera electronic fence, wherein the camera electronic fence is used for acquiring the position information of personnel in the process island. As an alternative embodiment, the method further comprises: When the running state of the intelligent transportation trolley is judged to be in an island, starting passing timing; And when the timing time is longer than a preset passing time threshold, and the intelligent transportation trolley is not detected to leave the island, judging that the intelligent transportation trolley passes out overtime, triggering overtime alarm and uploading a passing overtime event. As an optional implementation manner, the risk area includes at least a dangerous area, a warning area and a safe area, and the method for dividing the risk area in the process island includes: adding a preset first safety protection distance to the motion range of the automation equipment in the process island, and determining the operation area of each automation equipment; Adding a preset second safety protection distance to a passing path of the intelligen