US-20260125247-A1 - OVERHEAD HOIST TRANSPORT DEVICE AND OPERATION METHOD OF THE SAME

US20260125247A1US 20260125247 A1US20260125247 A1US 20260125247A1US-20260125247-A1

Abstract

An operation method of the overhead hoist transport device includes acquiring a first image of a first car by an image acquisition device on a second car; calculating a regression distance between the first car and the second car by using the first image as an input of a CNN model; adjusting a real distance between the first car and the second car based on the regression distance; and performing a CNN regression to adjusting a focus of the image acquisition device on the second car based on the regression distance.

Inventors

Hung Hsiang HU
Zheng-Xun YANG

Assignees

NANYA TECHNOLOGY CORPORATION

Dates

Publication Date: 20260507
Application Date: 20241104

Claims (17)

1 . An operation method of an overhead hoist transport device, wherein the overhead hoist transport comprises at least a first car and a second car, the operation method comprises: acquiring a first image of a first car by an image acquisition device on a second car; calculating a regression distance between the first car and the second car by using the first image as an input of a CNN model; adjusting a real distance between the first car and the second car based on the regression distance; and performing a CNN regression to adjusting a focus of the image acquisition device on the second car based on the regression distance.
2 . The operation method of the overhead hoist transport device of claim 1 , further comprising: before acquiring the first image of the first car by the image acquisition device on the second car, obtaining an image data of the first car by a plurality of cameras on the second car and obtaining a distance data between the first car and the second car by a distance sensor module on the second car; and training the CNN model based on the distance data and the image data.
3 . The operation method of the overhead hoist transport device of claim 2 , wherein the distance sensor module comprises a linear distance sensor and a curve distance sensor, and obtaining the image data of the first car by the plurality of cameras on the second car and obtaining the distance data between the first car and the second car by the distance sensor module on the second car further comprises: when the first car and the second car move in a linear section of a track, sensing a linear distance between the first car and the second car by the linear distance sensor on the second car; and when the first car and the second car move in a curved section of the track, sensing a curved distance between the first car and the second car by the curve distance sensor on the second car.
4 . The operation method of the overhead hoist transport device of claim 3 , further comprises: calculating a detected distance between the first car and the second car by using the distance sensor module; and comparing the regression distance and the detected distance to determine a minimum value.
5 . The operation method of the overhead hoist transport device of claim 4 , wherein adjusting the real distance between the first car and the second car based on the regression distance further comprises: adjusting the real distance between the first car and the second car based on the minimum value.
6 . The operation method of the overhead hoist transport device of claim 4 , wherein performing the CNN regression to adjusting the focus of the image acquisition device on the second car based on the regression distance further comprises: performing CNN regression to adjusting the focus of the image acquisition device on the second car based on the minimum value.
7 . The operation method of the overhead hoist transport device of claim 2 , wherein obtaining the image data of the first car by the plurality of cameras on the second car and obtaining the distance data between the first car and the second car by the distance sensor module on the second car further comprises: acquiring a plurality of test images of the first car by each one of the plurality of cameras on the first car, wherein the plurality of test images are acquired with different focal length.
8 . The operation method of the overhead hoist transport device of claim 2 , wherein calculating the regression distance between the first car and the second car by using the CNN model further comprises: transmitting the regression distance to a controlling system by a micro-controller of the image acquisition device after receiving a first signal sent by the controlling system.
9 . The operation method of the overhead hoist transport device of claim 8 , wherein a first time rate of calculating the regression distance is different from a second time rate of sending the first signal to the micro-controller.
10 . The operation method of the overhead hoist transport device of claim 8 , further comprising: when the regression distance is smaller than a threshold, sending an emergency signal to the controlling system of the overhead hoist transport device by the micro-controller of the image acquisition device.
11 . The operation method of the overhead hoist transport device of claim 7 , further comprising: enhancing the plurality of test images; comparing the plurality of test images after enhancement to get a comparing result; and determining one of the cameras as a first image acquisition device based on the comparing result.
12 . An overhead hoist transport device, comprising: a first car and a second car each comprising: a controlling system; an image acquisition device comprising a micro-controller, wherein the image acquisition device is electrically connected with the controlling system; and a distance sensor module electrically connected with the controlling system.
13 . The overhead hoist transport device of claim 12 , wherein the distance sensor module comprises: a linear distance sensor; and a curve distance sensor electrically connected with the linear distance sensor.
14 . The overhead hoist transport device of claim 13 , wherein the first car and the second car each comprises: a first part comprising a front side, wherein the curve distance sensor is disposed on the first part; and a second part comprising a front side, wherein the linear distance sensor is disposed on the second part.
15 . The overhead hoist transport device of claim 14 , further comprising: a first reflective mirror disposed on the first part.
16 . The overhead hoist transport device of claim 14 , further comprising: a second reflective mirror disposed on the second part.
17 . The overhead hoist transport device of claim 14 , further comprising: a plurality of cameras disposed at different positions on the front side of the first car and the front side of the second car.

Description

FIELD OF INVENTION The present invention relates to an overhead hoist transport device and an operation method of the overhead hoist transport device. DESCRIPTION OF RELATED ART In the overhead hoist transport field, a linear distance sensor and a curve distance sensor are commonly used. However, such sensor can only detect the distance between adjacent two cars only when the cars move along a linear track or a curved track with an angle within a detectable range of the curve distance sensor. Therefore, when the angle difference between the traveling directions of the adjacent two cars is not within the detectable range of the curve distance sensor, the distance between the cars cannot be detected. Accordingly, it is still a development direction for the industry to provide a operation method of the overhead hoist transport device that can solve the problem described above. SUMMARY The invention provides an operation method of the overhead hoist transport device. The overhead hoist transport includes at least a first car and a second car. In one embodiment, the operation method of the overhead hoist transport device includes acquiring a first image of a first car by an image acquisition device on a second car; calculating a regression distance between the first car and the second car by using the first image as an input of a CNN model; adjusting a real distance between the first car and the second car based on the regression distance; and performing a CNN regression to adjusting a focus of the image acquisition device on the second car based on the regression distance. In one embodiment, the operation method of the overhead hoist transport device further includes obtaining an image data of the first car by multiple cameras on the second car and obtaining a distance data between the first car and the second car by a distance sensor module on the second car before acquiring the first image of the first car by the image acquisition device on the second car; and training a CNN model based on the distance data and the image data. In one embodiment, the distance sensor module comprises a linear distance sensor and a curve distance sensor, and obtaining the image data of the first car by the cameras on the second car and obtaining the distance data between the first car and the second car by the distance sensor module on the second car further includes sensing a linear distance between the first car and a second car by the linear distance sensor on the second car when the first car and the second car move in a linear section of a track; and sensing a curved distance between the first car and a second car by the curve distance sensor on the second car when the first car and the second car move in a curved section of a track. In one embodiment, the operation method of the overhead hoist transport device further includes calculating a detected distance between the first car and the second car by using the distance sensor module; and comparing the regression distance and the detected distance to determine a minimum value. In one embodiment, adjusting the real distance between the first car and the second car based on the regression distance further includes adjusting the real distance between the first car and the second car based on the minimum value. In one embodiment, performing the CNN regression to adjusting the focus of the image acquisition device on the second car based on the regression distance further includes performing CNN regression to adjusting the focus of the image acquisition device on the second car based on the minimum value. In one embodiment, obtaining the image data of the first car by the cameras on the second car and obtaining the distance data between the first car and the second car by the distance sensor module on the second car further includes acquiring multiple test images of the first car by each one of the cameras on the first car, wherein the test images are acquired with different focal length. In one embodiment, calculating the regression distance between the first car and the second car by using the CNN model further includes transmitting the regression distance to the controlling system by the micro-controller of the image acquisition device after receiving a first signal sent by the controlling system. In one embodiment, a first time rate of calculating the regression distance is different from a second time rate of sending the first signal to the micro-controller. In one embodiment, the operation method of the overhead hoist transport device further includes sending an emergency signal to the controlling system of the overhead hoist transport device by the micro-controller of the image acquisition device when the regression distance is smaller than a threshold. In one embodiment, the operation method of the overhead hoist transport device further includes enhancing the test images; comparing the test images after enhancement to get a comparing result; and determining one of the