Abstract: A purpose of the utility model is to provide a laser receiving device, which comprises a photoelectric sensor, a main control board and a display module, wherein both the photoelectric sensor and the display module are connected with the main control board; the laser receiving device further comprises a laser ranging module; and the laser ranging module is connected with the main control board. By configuring the laser ranging module in the laser receiving device, a problem of complex operation due to the fact that receivers on the market must be matched with a telemeter rod at present is solved.

Abstract: A laser diode control method and control system, and a laser device. The control method comprises: using a first driving voltage and a first duty cycle to drive a laser diode to start working; acquiring the working time of the laser diode; and when the working time of the laser diode exceeds a first time threshold, using a second driving voltage and a second duty cycle to drive the laser diode to work, wherein the second driving voltage is lower than the first driving voltage, and/or the second duty cycle is smaller than the first duty cycle, such that the power consumption in the working process of the laser diode can be effectively reduced, and an excessive high temperature of the laser diode during normal operation can be prevented.

Abstract: Embodiments of the present disclosure relates to a warehousing system. The warehousing system includes a first ground marking arranged on a ground surface of a warehouse. The first ground marking includes machine-readable characteristics representing a warehouse location identification number (ID). The machine-readable characteristics include one or more horizontal lines parallelly arranged at equal intervals, wherein the total number of the one or more horizontal lines corresponding to a first information of the warehouse location ID, and one or more vertical lines parallelly arranged at equal intervals, wherein the total number of the vertical lines corresponding to a second information of the warehouse location ID that is different from the first information. The machine-readable characteristics are recognizable by one or more cameras of a self-driving system, and the self-driving system is operable to determine its position on a map of the warehouse based on the warehouse location ID.

Abstract: An optical imaging lens includes a first lens element to a fourth lens element, and each lens element has an object-side surface and an image-side surface. The first lens element has negative refracting power, an optical axis region of the object-side surface of the first lens element is convex, the third lens element has negative refracting power, and an optical axis region of the image-side surface of the fourth lens element is convex. Lens elements included by the optical imaging lens are only the four lens elements described above, and the optical imaging lens satisfies the relationship of Tmax+Tmin?700.000 ?m, Tmax is a maximum thickness of the four lens elements from the first lens element to the fourth lens element along the optical axis, Tmin is a minimum thickness of the four lens elements from the first lens element to the fourth lens element along the optical axis.

Abstract: A piece of luggage including a main body and a power supplying module is disclosed. The main body includes a moving module including a plurality of wheels and a main motor and a power unit electrically connected to the moving module. The wheels include an active wheel electrically connected to the main motor. The power supplying module includes a power supplying unit including a power supplying box and a battery and a connecting unit including a connecting part, a holding part and a conducting wire. The power supplying box has an output port. The battery is disposed in the power supplying box and electrically connected to the output port. The connecting part has a power port corresponding to the output port. The holding part and the conducting wire are connected to the connecting part. The conducting wire is electrically connected to the power port and the power unit.

Abstract: An optical imaging lens includes a first lens element, a second lens, an aperture stop, a third lens element and a fourth lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. An optical axis region of the object-side surface of the second lens element is convex. Only the above-mentioned four lens elements of the optical imaging lens have refracting power to satisfies the relationship: HFOV?15.000°, 3.000?TL/(G12+T2+G23) and TTL/BFL?3.500.

Abstract: Additive manufacturing (AM) methods and devices for high-melting-point materials are disclosed. In an embodiment, an additive manufacturing method includes the following steps. (S1) Slicing a three-dimensional computer-aided design model of a workpiece into multiple layers according to shape, thickness, and size accuracy requirements, and obtaining data of the multiple layers. (S2) Planning a forming path according to the data of the multiple layers and generating computer numerical control (CNC) codes for forming the multiple layers. (S3) Obtaining a formed part by preheating a substrate, performing a layer-by-layer spraying deposition by a cold spraying method, and heating a spray area to a temperature until the spraying deposition of all sliced layers is completed. (S4) Subjecting the formed part to a surface modification treatment by a laser shock peening method.

Abstract: A high-speed laser distance measuring device is described that includes an emitting part and a receiving part. The emitting part can include a polarizer (2) arranged between a light emitting tube (1) and a reflective mirror (3); the receiving part can further include a polarizing beamsplitter (7) arranged between the optical filter (6) and the receiving tube set. The light emitting tube (1) can emit an outgoing light beam to the polarizer (2), and the outgoing light beam can form an outgoing polarized light beam and is transmitted into the reflective mirror (3). After being reflected by the reflective mirror (3) and passing through the transmitting objective lens (4), the outgoing polarized light beam can be transmitted onto a target object. After being reflected by the target object, the outgoing polarized light beam can form a reflected polarized light beam, which passes through the receiving objective lens set (5) and is transmitted to the optical filter (6).

Abstract: A laser distance measuring device and a method of use thereof are described. The laser distance measuring device can include an emitting unit (4), a reflecting mirror (3), an emitting lens (2), a receiving lens (1), and a receiving unit (8); the laser distance measuring device can further include: at least one spectroscope (7) provided between the receiving lens (1) and the receiving unit (8), which is arranged successively on the same optical propagation path; at least one spectrum receiving unit (9) arranged in a one-to-one correspondence with the spectroscope (7). The technical solution has a wider measurement range and is adaptable to measured targets in different distances; a multiplicity of feedbacks and adjustments is not necessary, and the acquirement of the measurement data can be achieved in a short time, therefore the operating time is saved.

Abstract: A composite equal additive manufacturing method: S1, obtaining molten metal by using a metal smelting device; S2, first, storing inflow molten metal in an intermediate container, and then transferring the molten metal into a crystallizer; S3, cooling the molten metal to a solid-liquid mixed state by using the crystallizer, and enabling a high-temperature blank body with a required section to flow out from an outlet of the crystallizer; S4, arranging plastic forming tools at a bottom of the outlet of the crystallizer, and performing plastic forming on the outflow high-temperature blank body; S5, fixing a lower end of a part after the plastic forming and slowly descending the part by a chuck; S6, machining the part by using point forming machines, and synchronously controlling the machining temperature of the part; and S7, descending the chuck to an appropriate position, and taking the formed part out from the machine frame.

Abstract: A laser radar receiving system including a laser radar and a reflecting element. The laser radar includes a first reflector mirror, an emitting channel, an emission system and a basic receiving system. The laser beam emitted by the emission system is reflected by the first reflector mirror, reaches a target through the emitting channel, is reflected from the target and passes through the emitting channel, and is reflected by the first reflector mirror and received by the basic receiving system. The reflecting element is provided in an area outside the emitting channel that is unreachable by the laser beam reflected from the target, and is used for reflecting the laser beam from the area outside the emitting channel to the basic receiving system, thereby simultaneously avoiding blind area and stray light interference in short-range measurements, and improving measurement accuracy and expanding the short-range measurement range of radar.

Abstract: Wire arc additive manufacturing-spinning combined machining device and method are provided. The machining device includes a spinning mechanism and a fused deposition modeling mechanism. The spinning mechanism includes a machine tool and a spinning head. The spinning head is installed on the machine tool by a main shaft, and the main shaft is configured to drive the spinning head to rotate to achieve the movement in three vertical directions. The spinning head includes a spinning base and balls. Each of the balls is installed in a corresponding one of arc grooves at a bottom of the spinning base. The fused deposition modeling mechanism includes a moving track, a robot and a heat source generator. The arc moving track is arranged around the machine tool in a surrounding mode. The robot is movably installed on the moving track. The heat source generator is installed at a tail end of the robot.

Abstract: A laser collimation- measuring system, including: a first laser source; a second laser source; a light combining device; a collimator; and a light divergence device. The first laser source and the second laser source emit a first laser and a second laser, respectively, to the light combining device. The first laser and the second laser are transmitted through the light combining device as a third laser and a fourth laser, respectively, and the third laser partially overlaps the fourth laser. The collimator is disposed in a light path of the third and fourth lasers and positioned between the light combining device and the laser divergence device. The laser collimation-measuring system enhances intensity of the laser collimation-measuring system.

Abstract: A composite equal additive manufacturing method: S1, obtaining molten metal by using a metal smelting device; S2, first, storing inflow molten metal in an intermediate container, and then transferring the molten metal into a crystallizer; S3, cooling the molten metal to a solid-liquid mixed state by using the crystallizer, and enabling a high-temperature blank body with a required section to flow out from an outlet of the crystallizer; S4, arranging plastic forming tools at a bottom of the outlet of the crystallizer, and performing plastic forming on the outflow high-temperature blank body; S5, fixing a lower end of a part after the plastic forming and slowly descending the part by a chuck; S6, machining the part by using point forming machines, and synchronously controlling the machining temperature of the part; and S7, descending the chuck to an appropriate position, and taking the formed part out from the machine frame.

Abstract: A welding bead modeling method for wire-arc additive manufacturing, a device therefor and a system therefor including using a dynamic parameter method, and using different welding process parameters in the same welding bead in the a wire-arc additive manufacturing process to obtain a welding bead with synchronous and dynamic changes in profile along with the dynamic changes of the welding process parameters. The method further comprising using a line laser sensor for scanning to obtain the segmented profile of the processed welding bead, and corresponding each welding bead profile to the welding process parameters one by one to train the neural network as training data, so as to obtain a welding bead modeling model capable of obtaining the corresponding welding bead profile according to the input welding process parameters.