Safety collision detection device and its large lifting platform
By using a through-beam photoelectric sensor driven by a rotary cylinder and a linear motor, the problems of reaction lag, easy damage, and environmental interference in the safety collision detection device of large lifting platforms have been solved, achieving fast, sensitive safety detection and low maintenance costs.
Patent Information
- Application Number
- CN202521501698.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-03
- Estimated Expiration
- 2035-07-17
AI Technical Summary
Existing safety collision detection devices for large lifting platforms suffer from problems such as delayed response, easy damage, susceptibility to environmental interference, and insufficient detection accuracy.
Using a through-beam photoelectric sensor driven by a rotary cylinder and a linear motor, foreign objects are detected by light propagation. Combined with the flexible collision handling of the robotic arm, flexible deployment and storage are achieved, avoiding rigid collisions.
It achieves rapid and sensitive safety collision detection, has wide adaptability, reduces maintenance costs, minimizes environmental interference, and improves the practicality and adaptability of the device.
Smart Images
Figure CN224450250U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of safety collision detection devices used in large lifting platforms, specifically relating to a safety collision detection device and a large lifting platform made therefrom. Background Technology
[0002] Safety collision detection devices for the edges of large lifting platforms include both contact and non-contact types.
[0003] Contact detection methods include:
[0004] The combination of a mechanical buffer and a limit switch is simple and intuitive in structure. When a collision occurs, the mechanical buffer absorbs some of the impact force, reducing damage to the platform. The limit switch, once triggered, quickly cuts off the platform's power, making the operation direct and effective. However, this method has a lag in response; it only takes effect after a certain degree of impact, making it difficult to completely prevent collisions with high-speed moving objects. Furthermore, the mechanical buffer is prone to damage and deformation after repeated collisions, requiring frequent maintenance and replacement, increasing costs and workload.
[0005] Non-contact detection methods mainly fall into the following categories:
[0006] 1. Millimeter-wave radar: Millimeter-wave radar offers high target detection accuracy, precisely determining the distance and relative velocity between the object and the platform. It exhibits strong anti-interference capabilities and can operate stably in adverse sea conditions and weather, such as dense fog and heavy rain. However, strong electromagnetic interference may cause signal disturbances and misjudgments. For objects made of special materials or with unusual shapes, radar wave reflection can be affected, leading to reduced detection accuracy.
[0007] 2. Infrared Thermal Imaging Sensor: Infrared thermal imaging sensors are not limited by lighting conditions and can effectively detect heat-generating objects, such as people and vehicles, at night or in low light. The temperature differences between different objects are clearly imaged, making identification easy. However, the detection effect is poor for objects with temperatures close to the ambient temperature or at low temperatures. Infrared signals attenuate significantly when penetrating smoke and dust, reducing detection distance and accuracy. Utility Model Content
[0008] The technical problem this invention aims to solve is: how to design a safety collision detection device to protect the safety of large lifting platforms.
[0009] The specific technical solution of this utility model is as follows:
[0010] A safety collision detection device includes a first detection part and a second detection part; the first detection part includes a rotary cylinder, the rotary cylinder includes a cylinder base and a rotating component, a rear base is fixed on the rotating component, a linear motor is fixed on the rear base, the moving end of the linear motor is fixed to a front base, and a through-beam photoelectric sensor is provided on the front base; the structure of the second detection part is the same as that of the first detection part; the through-beam photoelectric sensor of the first detection part is a light emitter, and the through-beam photoelectric sensor of the second detection part is a light receiver.
[0011] The front base is equipped with casters.
[0012] The linear motor has two parallel components.
[0013] A positioning block is fixed to the outside of the cylinder seat, and a positioning pin is fixed to the rear base.
[0014] A large lifting platform has a mounting recess at both ends of the edge to be detected on its upper surface. The first detection part of the safety collision detection device as described in claim 1 is fixed in one mounting recess, and the second detection part of the safety collision detection device as described in claim 1 is fixed in the other mounting recess, keeping the emitter facing the receiver.
[0015] Compared with the prior art, the technical effect of this utility model is that it can take into account the advantages of both contact detection and non-contact detection. It is equipped with a linear cylinder, which can adjust the extension length of the inspection base, so as to realize the flexible deployment and storage of photoelectric sensors and meet the safety requirements of protecting large lifting platforms. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the first detection section.
[0017] Figure 2 This is a schematic diagram showing the cooperation between the second detection section and the first detection section.
[0018] Figure 3 This is a schematic diagram of the first inspection section of the installation of a large lifting platform.
[0019] Figure 4 A schematic diagram of the first detection section.
[0020] Figure 5 This is a schematic diagram of the utility model in use. Detailed Implementation
[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0022] like Figure 2 A safety collision detection device includes a first detection part 100 and a second detection part 200.
[0023] like Figure 1 The first detection part 100 includes a rotary cylinder 4, which includes a cylinder seat 41 and a rotating part 42. A rear base 7 is fixed on the rotating part 42, a linear motor 3 is fixed on the rear base 7, and a front base 8 is fixed to the moving end of the linear motor 3. A through-beam photoelectric sensor 2 is provided on the front base 8.
[0024] The structure of the second detection section 200 is the same as that of the first detection section 100, including a rotary cylinder 4. The rotary cylinder 4 includes a cylinder seat 41 and a rotating component 42. A rear base 7 is fixed on the rotating component 42. A linear motor 3 is fixed on the rear base 7. The moving end of the linear motor 3 is fixed to a front base 8. A through-beam photoelectric sensor 2 is provided on the front base 8.
[0025] like Figure 2 The through-beam photoelectric sensor 2 of the first detection section 100 is a light emitter 21, and the through-beam photoelectric sensor 2 of the second detection section 200 is a light receiver 22.
[0026] One type of photoelectric sensor is the through-beam photoelectric sensor: by separating the emitter and receiver, the detection distance can be increased. A photoelectric switch consisting of one emitter and one receiver is called a through-beam split photoelectric switch, or simply a through-beam photoelectric switch. Its detection distance can reach several meters or even tens of meters. In use, the emitter and receiver are installed on opposite sides of the path of the object being detected. When the object passes by and blocks the light path, the receiver activates and outputs a switch control signal.
[0027] like Figure 1 To avoid rigid collisions, the front base 8 is equipped with rollers 1.
[0028] like Figure 1 To ensure stable operation, the linear motor 3 has two parallel ones.
[0029] like Figure 1 In order to accurately determine the position of the rear base 7, a positioning block 5 is fixed to the outside of the cylinder seat 41, and a positioning pin 6 is fixed on the rear base 7.
[0030] like Figure 3-5 A large lifting platform 900 has a mounting recess 902 at both ends of the edge to be detected on its upper surface 901. A first detection part 100 is fixed in one mounting recess 902, and a second detection part 200 is fixed in the other mounting recess 902, keeping the light emitter 21 facing the light receiver 22.
[0031] like Figure 1-5 Its working principle is as follows:
[0032] S10, Storage Status
[0033] like Figure 3When no inspection is required (such as when loading and unloading goods), both the first inspection part 100 and the second inspection part 200 retract to their minimum profile. Specifically, the rotary cylinder 4 rotates to a suitable position, and the linear motor 3 retracts to its limit, so that the first inspection part 100 and the second inspection part 200 are hidden in the mounting recess 902, thus protecting the safety of the first inspection part 100 and the second inspection part 200.
[0034] S20, Check Status
[0035] S21. Preparation: The moving end of the linear motor 3 extends, so that the front base 8 of the first detection part 100 and the second detection part 200 moves out of the mounting recess 902, the rotary cylinder 4 rotates to a suitable position, and the light emitter 21 is adjusted to face the light receiver 22.
[0036] S22. Non-contact detection: When there are foreign objects (people or other equipment) at the edge of the lifting platform, these foreign objects will block the propagation of the light 300 emitted by the light emitter 21, and the receiver 22 will not receive the light 300. At this time, the transmitter of the photoelectric point sensor will input a high potential to the motion controller of the lifting platform. The normal lifting operation of the lifting platform will stop immediately until the foreign object is removed and the lifting command is re-entered.
[0037] S23. Contact Detection: When a foreign object collides with the front base 8 during lifting, the elastic small robotic arm, assembled with two cylinders connected in series, will deflect under the impact force. Whether it is the first detection part 100 or the second detection part 200 that deflects, the emitter 21 will no longer face the receiver 22, and the receiver 22 will not receive the light 300 emitted by the emitter 21. At this time, the transmitter of the photoelectric point sensor will input a high potential to the motion controller of the lifting platform. The normal lifting operation of the lifting platform will stop immediately until the foreign object is removed and the lifting command is re-entered.
[0038] In this step, the rollers 1 on the front base 8 will act as lubricants, turning rigid collisions into flexible collisions and extending their service life.
[0039] Features of this application:
[0040] The edge safety collision detection device for large lifting platforms proposed in this utility model has many advantages over traditional detection methods:
[0041] S1. Sensitive and timely detection: Utilizing the photoelectric sensing principle, when a foreign object blocks the light transmission, whether it is operating normally at the edge of the platform or when the foreign object collides with the top of the linear cylinder causing the light to be blocked, the photoelectric sensor can quickly detect it and input a high-potential signal into the motion controller, causing the lifting platform to stop operating immediately. The response is sensitive and can effectively avoid collision accidents, overcoming the problem of delayed response of contact detection methods.
[0042] S2. Wide adaptability of detection method: Detection is carried out through light transmission, which is not affected by whether the object is heated, its material, or its shape. This avoids the shortcomings of millimeter-wave radar in detecting objects with special materials or shapes, and infrared thermal imaging sensors in detecting objects with temperatures close to or low in the environment. It can detect various foreign objects and has a wider detection range.
[0043] S3. Ingenious and practical structural design: The robotic arm, composed of rotary and linear cylinders, allows for flexible deployment and storage of photoelectric sensors. During loading and unloading, the sensors can be stored inside the platform to avoid interfering with the process; during lifting, they can be deployed to the working position for detection, improving the device's practicality and adaptability to different operating scenarios.
[0044] S4. Reduced maintenance costs: The rollers on the robotic arm act as lubricants when foreign objects collide, reducing damage to the device. Compared to mechanical buffers in contact detection methods that are easily damaged and deformed and require frequent maintenance and replacement, this device has a more stable mechanical structure, reducing maintenance costs and workload.
[0045] S5. Less affected by environmental interference: This device uses light propagation for detection, and is to a certain extent unaffected by severe sea conditions, weather, and electromagnetic interference. Compared with millimeter-wave radar, which is prone to signal disorder and misjudgment when encountering strong electromagnetic interference, it has stronger environmental adaptability.
[0046] For other details, please refer to the existing technology.
[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.
Claims
1. A safe collision detection apparatus characterized by: It includes a first detection section (100) and a second detection section (200); The first detection part (100) includes a rotary cylinder (4), the rotary cylinder (4) includes a cylinder seat (41) and a rotating part (42), a rear base (7) is fixed on the rotating part (42), a linear motor (3) is fixed on the rear base (7), the moving end of the linear motor (3) is fixed on the front base (8), and a through-beam photoelectric sensor (2) is provided on the front base (8). The structure of the second detection section (200) is the same as that of the first detection section (100); The through-beam photoelectric sensor (2) of the first detection section (100) is a light emitter (21), and the through-beam photoelectric sensor (2) of the second detection section (200) is a light receiver (22).
2. The safety collision detection apparatus of claim 1, wherein: The front base (8) is equipped with rollers (1).
3. The safety collision detection apparatus of claim 1, wherein: The linear motor (3) has two parallel ones.
4. The safety collision detection apparatus of claim 1, wherein: A positioning block (5) is fixed to the outside of the cylinder seat (41), and a positioning pin (6) is fixed on the rear base (7).
5. A large lift platform characterized by: The upper surface (901) has a mounting recess (902) at both ends of the edge to be detected. The first detection part (100) of the safety collision detection device as described in claim 1 is fixed in one of the mounting recesses (902), and the second detection part (200) of the safety collision detection device as described in claim 1 is fixed in the other mounting recess (902), keeping the light emitter (21) facing the light receiver (22).