A filter housing that is compatible with various prisms

Abstract

This utility model discloses a filter housing adapted to various prisms, including a filter housing, an anti-collision rubber ring placed inside the filter housing, and a filter embedded inside the filter housing. The outer ring of one side of the filter abuts against the anti-collision rubber ring, and an anti-collision pad and a housing threaded ring are sequentially placed on the other side of the filter. The housing threaded ring is threadedly connected to the filter housing. This utility model solves the point cloud expansion problem that occurs in lidar measurements of monitoring prisms by adding a filter capable of filtering out 905nm laser light to the front end of the prism lens. For currently used monitoring prisms, a housing with a filter is added to the front end of the prism. Depending on the shape of the monitoring prism, a cover-fixing method or an insert-fixing method can be considered, flexibly adjusting the size of the filter housing to adapt to monitoring prisms of various sizes. The filter also protects the prism from dust, grit, and other contaminants that could damage its surface.

Description

Technical Field

[0001] This utility model relates to the field of filter housing technology, specifically a filter housing adapted to various prisms. Background Technology

[0002] Currently, industries such as construction engineering and road engineering are booming, and the surveying technology used during construction is also constantly improving, updating and iterating. With the widespread use of total stations, lidar measurement technology is also developing rapidly and is widely used, including in fields such as autonomous driving, robot navigation and topographic mapping.

[0003] Total station measurements are based on three core functions: photoelectric ranging, electronic angle measurement, and data integration. Photoelectric ranging uses electromagnetic wave ranging technology, which calculates distance by emitting modulated light waves (infrared / laser) to a monitoring prism and measuring the phase difference or time difference between the emitted and reflected waves. A reflector is required in the measurement process. LiDAR can provide high-precision environmental perception data. The measurement principle of lidar is based on the emission and reception of laser pulse signals and the calculation of time of flight. The transmitting system emits laser pulses towards the target object, and the reflected light is captured by the receiving system and converted into an electrical signal. The information processing system processes the signal to generate point cloud data.

[0004] However, when lidar is used in conjunction with a total station, reflectors used with the total station, such as monitoring prisms, can affect the lidar's mapping work. This causes the point cloud data generated by the lidar to spread around the reflector, making the reflector's position data unusable and causing anomalies in the data around the reflector, thus making collaborative monitoring difficult. Utility Model Content

[0005] The purpose of this invention is to provide a filter housing that is compatible with various prisms, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a filter housing adapted to various prisms, comprising a filter housing, an anti-collision rubber ring placed inside the filter housing, a filter embedded inside the filter housing, and an outer ring on one side of the filter abutting against the anti-collision rubber ring, an anti-collision pad and a housing threaded ring placed sequentially on the other side of the filter, and the housing threaded ring being threadedly connected to the filter housing.

[0007] First, the anti-collision rubber ring is placed into the filter housing, and then the filter is placed into the filter housing. The anti-collision rubber ring protects and cushions the filter, preventing the large surface of the filter from directly contacting the filter housing, and also provides protection and waterproofing. After the filter, anti-collision pads and housing threaded rings are placed in sequence. The anti-collision pads also protect the filter from water. The housing threaded rings are fixed to the filter housing with threads, and the anti-collision pads are tightened to prevent the filter from shaking in the filter housing.

[0008] Preferably, the filter is used to filter the 905nm laser of the lidar. The filter can filter out the 905nm laser of the lidar that will be reflected by the monitoring prism, thereby reducing the influence of the prism on the lidar measurement.

[0009] Preferably, the filter is disposed between the anti-collision rubber ring and the anti-collision pad. The anti-collision rubber ring protects and buffers the filter, preventing the large surface of the filter from directly contacting the filter housing, and also provides protection and waterproofing. The anti-collision pad also protects the filter from water.

[0010] Preferably, the filter housing has a through hole in the middle, and the through hole is provided corresponding to the filter.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention addresses the point cloud expansion problem encountered by monitoring prisms in lidar measurements by adding a filter capable of blocking 905nm laser light to the front end of the prism lens. For currently used monitoring prisms, a housing with a filter is added to the front end of the prism housing. Depending on the shape of the monitoring prism, the size of the filter housing can be flexibly adjusted, either by covering or by inserting it in, to accommodate various sizes of monitoring prisms. The filter also protects the prism from dust, grit, and other contaminants that could damage its surface. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0014] Figure 2 This is an exploded view of the present invention;

[0015] Figure 3 This is a schematic diagram of the filter housing of this utility model using a slip-on installation method;

[0016] Figure 4 This is a schematic diagram of the filter housing of this utility model using an embedded installation method.

[0017] In the diagram: 1. Filter housing; 2. Anti-collision rubber ring; 3. Filter; 4. Anti-collision pad; 5. Housing coil. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figure 1-4 This utility model provides a filter housing that is compatible with various prisms, including a filter housing 1, an anti-collision rubber ring 2 placed inside the filter housing 1, a filter 3 embedded inside the filter housing 1, and the outer ring of one side of the filter 3 abutting against the anti-collision rubber ring 2. An anti-collision pad 4 and a housing thread ring 5 are placed sequentially on the other side of the filter 3, and the housing thread ring 5 is threadedly connected to the filter housing 1.

[0020] Specifically, a prism housing 1 with a specified wavelength filter is installed in front of the monitoring prism using a special method. This filter 3 can filter out the 905nm laser light reflected by the lidar from the monitoring prism, reducing the influence of the prism on lidar measurements. The size of the filter housing 1 is flexible and needs to be changed according to the size of the prism housing used at the monitoring site. The filter housing 1 is installed and fixed to the front end of the monitoring prism using two fixing methods: embedded and sleeved. This ensures that there will be no point cloud expansion of the prism when using lidar for measurement, thus improving the measurement accuracy of the total station.

[0021] Filter 3 is used to filter the 905nm laser from the lidar.

[0022] Specifically, filter 3 can filter out the 905nm laser light reflected by the monitoring prism from the lidar, reducing the influence of the prism on lidar measurements.

[0023] The filter 3 is positioned between the anti-collision rubber ring 2 and the anti-collision pad 4.

[0024] Specifically, the anti-collision rubber ring 2 will protect and buffer the filter 3, preventing the large surface of the filter 3 from directly contacting the filter cover 1, and playing a role in protection and waterproofing. The anti-collision pad 4 will also protect and waterproof the filter 3.

[0025] The filter housing 1 has a through hole in the middle, which is corresponding to the filter 3.

[0026] Specifically, the through-hole design allows light to enter the prism from the filter 3, preventing the filter housing 1 from blocking the light.

[0027] The working principle is as follows: First, the anti-collision rubber ring 2 is placed in the filter housing 1, and then the filter 3 is placed in the filter housing 1. The anti-collision rubber ring 2 will protect and buffer the filter 3, preventing the large surface of the filter 3 from directly contacting the filter housing 1, and playing a role in protection and waterproofing. After the filter 3, the anti-collision pad 4 and the housing thread ring 5 are placed in sequence. The anti-collision pad 4 also plays a role in protecting and waterproofing the filter 3. The housing thread ring 5 is fixed to the filter housing 1 by threads. Tightening the anti-collision pad 4 prevents the filter 3 from shaking in the filter housing 1.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter housing suitable for adapting to various prisms, comprising a filter cover housing (1), characterized in that, An anti-collision rubber ring (2) is placed inside the filter housing (1). A filter (3) is embedded inside the filter housing (1), and the outer ring of one side of the filter (3) abuts against the anti-collision rubber ring (2). An anti-collision pad (4) and a housing thread ring (5) are placed on the other side of the filter (3). The housing thread ring (5) is threadedly connected to the filter housing (1).

2. The filter housing of claim 1, wherein: The filter (3) is used to filter the 905nm laser of the lidar.

3. The filter housing of claim 1, wherein: The filter (3) is disposed between the anti-collision rubber ring (2) and the anti-collision pad (4).

4. The filter housing of claim 1, wherein: The filter housing (1) has a through hole in the middle, and the through hole is correspondingly arranged with the filter (3).

Images