Nozzle anti-collision method of printing equipment, detection device and printing equipment

Abstract

The embodiment of the invention relates to the technical field of printing equipment, and particularly discloses an anti-collision method for a nozzle of printing equipment, a detection device and the printing equipment, and the method comprises the steps: firstly controlling a light emitting mechanism to emit detection surface light, and obtaining an emitted light intensity value of the detection surface light emitted by the light emitting mechanism; and after the light receiving mechanism receives the detection surface light, the receiving light intensity value of the detection surface light received by the light receiving mechanism is detected, whether an abnormal obstacle exists in a preset moving area of the spray head or not is determined according to the emitting light intensity value and the receiving light intensity value, and finally, if the abnormal obstacle exists, a preset spray head anti-collision strategy is executed. According to the embodiment of the invention, through comparative analysis of the light intensity of the detection surface light before and after passing through the preset moving area of the nozzle, non-contact detection of abnormal obstacles on the moving path of the nozzle is realized, and the sensitivity and reliability of anti-collision detection of the nozzle are improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of printing equipment, and in particular to a nozzle anti-collision method, a detection device and a printing equipment of a printing equipment. Background Art

[0002] A digital printing machine is a high-precision and high-efficiency printing device that uses digital control technology to print patterns or text directly onto fabrics or other media. During the operation of a digital printing machine, the precise movement and positioning of the nozzle is essential to ensure the quality of printing and the clarity of the pattern. However, due to the complex and changeable working environment, the nozzle may encounter various unexpected obstacles during movement, such as raised structures inside the equipment, improperly placed media, or other accidentally dropped objects. When the nozzle collides with these obstacles, it will cause damage to the nozzle, resulting in printing interruption, pattern distortion or media damage, which will affect printing efficiency and product quality. At present, anti-collision protection for the nozzle is usually achieved through mechanical devices, such as setting physical blocks and protection switches. When the obstacle touches the physical block and triggers the protection switch, the nozzle stops moving.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that small, soft or irregularly shaped obstacles are difficult to effectively touch the physical components and activate the protection switch, resulting in low reliability and sensitivity of the mechanical anti-collision device for the nozzle. Summary of the invention

[0004] In view of the above problems, embodiments of the present invention provide a nozzle anti-collision method, a detection device and a printing device for a printing device, which overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a nozzle anti-collision method for a printing device, which is applied to a detection device, wherein the detection device includes a light emitting mechanism and a light receiving mechanism, wherein the light emitting mechanism is used to emit detection surface light, and the detection surface light passes through a preset moving area of ​​the nozzle of the printing device in parallel, and the light receiving mechanism is used to receive the detection surface light, and the transmission direction of the detection surface light is perpendicular to the moving direction of the nozzle, and the method includes: controlling the light emitting mechanism to emit the detection surface light, and obtaining the emission light intensity value of the detection surface light emitted by the light emitting mechanism; after the light receiving mechanism receives the detection surface light, detecting the received light intensity value of the detection surface light received by the light receiving mechanism; determining whether there is an abnormal obstacle on the preset moving area of ​​the nozzle according to the emission light intensity value and the received light intensity value; if there is an abnormal obstacle, executing a preset nozzle anti-collision strategy.

[0006] In some embodiments, the step of determining whether there is an abnormal obstacle on the preset moving area of ​​the nozzle based on the emitted light intensity value and the received light intensity value further includes: calculating the ratio of the received light intensity value to the emitted light intensity value; judging whether the ratio is less than or equal to a preset threshold value; if the ratio is less than or equal to the preset threshold value, determining that there is an abnormal obstacle on the preset moving area of ​​the nozzle; if the ratio is greater than the preset threshold value, determining that there is no abnormal obstacle on the preset moving area of ​​the nozzle.

[0007] In some embodiments, the step of executing a preset nozzle anti-collision strategy further includes: sending a stop operation instruction to the nozzle to stop the nozzle from operating.

[0008] In some embodiments, the step of executing a preset nozzle anti-collision strategy further includes: issuing an alarm signal.

[0009] In some embodiments, the warning signal is a sound signal or an image signal.

[0010] In some embodiments, before the step of controlling the light emitting mechanism to emit detection surface light, the method further includes: acquiring status information of the nozzle; judging whether the nozzle is in a working state based on the status information; if the nozzle is in a working state, entering the step of controlling the light emitting mechanism to emit detection surface light.

[0011] In some embodiments, if the nozzle is in a non-working state, the light emitting mechanism and the light receiving mechanism are controlled to be turned off.

[0012] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a detection device, applied to a printing device, the detection device includes a light emitting mechanism, a light receiving mechanism, at least one processor and a memory, the light emitting mechanism is used to emit detection surface light, the detection surface light passes through a preset moving area of ​​a nozzle of the printing device in parallel, the transmission direction of the detection surface light is perpendicular to the moving direction of the nozzle, the light receiving mechanism is used to receive the detection surface light, the at least one processor is communicated with the light emitting mechanism and the light receiving mechanism respectively, the memory is communicated with the at least one processor, wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method as described above.

[0013] In some embodiments, the detection device also includes a bevel reflection component, which is used to be set on one side of the nozzle. The light emitting mechanism emits the detection surface light to the bevel reflection component. After the detection surface light is reflected by the bevel reflection component, it passes through a preset moving area of ​​the nozzle in parallel.

[0014] In some embodiments, the detection device also includes a plane reflection component, which is used to be set on the other side of the nozzle, and the plane reflection component is arranged opposite to the bevel reflection component. The plane reflection component is used to reflect the detection surface light reflected by the bevel reflection component back to the bevel reflection component, and the bevel reflection component reflects the detection surface light reflected by the plane reflection component again and then enters the light receiving mechanism.

[0015] In order to solve the above technical problem, another technical solution adopted by the present invention is: to provide a printing device, including a nozzle and the detection device as described above.

[0016] The beneficial effect of the embodiments of the present invention is as follows: Different from the prior art, the embodiments of the present invention provide a nozzle anti-collision method, a detection device and a printing device for a printing device, wherein the method is applied to the detection device, wherein the detection device comprises a light emitting mechanism and a light receiving mechanism, wherein the light emitting mechanism is used to emit detection surface light, wherein the detection surface light passes through a preset moving area of ​​the nozzle of the printing device in parallel, and the light receiving mechanism is used to receive the detection surface light, wherein the transmission direction of the detection surface light is perpendicular to the moving direction of the nozzle, and the method comprises: firstly controlling the light emitting mechanism to emit the detection surface light, and obtaining the emission light intensity value of the detection surface light emitted by the light emitting mechanism, and then after the light receiving mechanism receives the detection surface light, detecting the received light intensity value of the detection surface light received by the light receiving mechanism, and then determining whether there is an abnormal obstacle on the preset moving area of ​​the nozzle according to the emission light intensity value and the received light intensity value, and finally, if there is an abnormal obstacle, executing a preset nozzle anti-collision strategy. The embodiment of the present invention realizes non-contact detection of abnormal obstacles on the moving path of the nozzle by comparing and analyzing the light intensity of the detection surface light before and after passing through the preset moving area of ​​the nozzle, thereby improving the sensitivity and reliability of the nozzle anti-collision detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0018] Figure 1It is a schematic diagram of an application environment of the nozzle anti-collision method of a printing device provided by an embodiment of the present invention;

[0019] Figure 2 It is a flow chart of a nozzle anti-collision method of a printing device provided by an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A schematic diagram of a sub-process of step S30 in the nozzle anti-collision method shown;

[0021] Figure 4 yes Figure 2 A schematic diagram of a sub-process of step S40 in the nozzle anti-collision method shown;

[0022] Figure 5 It is a structural schematic diagram of a detection device and a printing medium provided by an embodiment of the present invention;

[0023] Figure 6 is a schematic structural diagram of another detection device and printing medium provided by an embodiment of the present invention;

[0024] Figure 7 is a structural schematic diagram of another detection device and printing medium provided by an embodiment of the present invention;

[0025] Figure 8 yes Figure 7 Schematic diagram of the structure of area A in the middle. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] See also Figure 1 , Figure 1It is a schematic diagram of one of the application environments of a nozzle anti-collision method for a printing device provided by an embodiment of the present invention, the application environment includes a nozzle 10, a detection device 20 and a printing medium 30, the nozzle 10 reciprocates and prints along a direction x above the printing medium 30, the detection devices 20 are respectively arranged on both sides of the nozzle 10 along the direction x, and are used to monitor whether there are abnormal obstacles in the moving area when the nozzle 10 reciprocates along the direction x, so as to prevent the nozzle 10 from colliding with the obstacle during the movement.

[0029] The printing medium 30 is a medium that can receive inkjet and form a pattern. The printing medium can be transfer paper, fabric cloth, corrugated paper, printing paper, photo paper, product shell, etc. Specifically, it can be selected according to the needs of the actual application scenario.

[0030] The embodiment of the present invention provides a method for preventing the nozzle from collision in a printing device. Figure 2 , Figure 2 The flow of a nozzle anti-collision method for a printing device provided by an embodiment of the present invention is shown. The method is applied to a detection device, and the detection device includes a light emitting mechanism and a light receiving mechanism. The light emitting mechanism is used to emit detection surface light, and the detection surface light passes through a preset moving area of ​​the nozzle of the printing device in parallel. The light receiving mechanism is used to receive the detection surface light, and the transmission direction of the detection surface light is perpendicular to the moving direction of the nozzle. The method includes but is not limited to the following steps:

[0031] Step S10: controlling the light emitting mechanism to emit detection surface light, and obtaining the emission light intensity value of the detection surface light emitted by the light emitting mechanism;

[0032] Specifically, in some embodiments, the detection surface light emitted by the light emitting mechanism passes through the preset moving area of ​​the nozzle in parallel and reaches the light receiving mechanism. In other embodiments, the detection surface light emitted by the light emitting mechanism is reflected by the bevel reflection component, passes through the preset moving area of ​​the nozzle in parallel and reaches the light receiving mechanism. In still other embodiments, the detection surface light emitted by the light emitting mechanism is reflected by the bevel reflection component, passes through the preset moving area of ​​the nozzle in parallel, and then is reflected by the plane reflection component and reaches the light receiving mechanism.

[0033] The light emitting mechanism is a laser emitting mechanism, and the detection surface light is a laser beam. The laser beam has a high degree of directionality and monochromaticity, and can ensure the stability and accuracy of the detection surface light during transmission. The width and intensity of the laser beam can be adjusted according to actual application requirements to adapt to the working characteristics of different printing devices and nozzles. The emission light intensity value of the detection surface light emitted by the light emitting mechanism refers to the light intensity of the laser beam at the initial emission, and the value is obtained by preset parameter settings or actual measurements.

[0034] Step S20: After the light receiving structure receives the detection surface light, detecting the received light intensity value of the detection surface light received by the light receiving structure;

[0035] Specifically, the light receiving mechanism converts the received detection surface light signal into an electrical signal through a photoelectric sensor or a photosensitive element, and then obtains the received light intensity value according to the electrical signal analysis. Furthermore, the light receiving mechanism also reduces noise interference and enhances useful signals through signal amplification and filtering circuits to improve the measurement accuracy.

[0036] Step 30: Determine whether there is an abnormal obstacle in the preset moving area of ​​the nozzle according to the emitted light intensity value and the received light intensity value;

[0037] For details, please refer to Figure 3 , Figure 3 Shows Figure 2 A sub-process of step S30 in the nozzle anti-collision method shown in , wherein the step of determining whether there is an abnormal obstacle in the preset moving area of ​​the nozzle according to the emitted light intensity value and the received light intensity value comprises:

[0038] Step S31: Calculate the ratio between the emitted light intensity value and the received light intensity value;

[0039] Step S32: determining whether the ratio is less than or equal to a preset threshold;

[0040] Step S33: if the ratio is less than or equal to the preset threshold, it is determined that an abnormal obstacle exists in the preset moving area of ​​the nozzle;

[0041] Step S34: If the ratio is greater than a preset threshold, it is determined that there is no abnormal obstacle in the preset moving area of ​​the nozzle.

[0042] The preset threshold refers to a ratio limit determined by historical data or theoretical calculation between the emission light intensity value of the detection surface light emitted by the light emitting mechanism and the received light intensity value received by the light receiving mechanism under normal obstacle-free conditions. The preset threshold takes into account the performance parameters of the detection device and the printing device, environmental factors (such as ambient light, air transparency, etc.) and the possible normal light intensity attenuation during the movement of the nozzle, ensuring that under normal operating conditions, the received light intensity value is kept within a reasonable range relative to the emission light intensity value.

[0043] It should be noted that abnormal obstacles refer to any objects that may hinder the normal movement of the nozzle or affect the printing quality, including but not limited to paper scraps, dust particles, debris, improperly fixed edges of printing media, or other foreign objects that accidentally fall into the movement path of the nozzle.

[0044] It can be understood that the bottom of the detection surface light passing through the preset moving area of ​​the nozzle is flush with the bottom of the nozzle, or the bottom of the detection surface light passing through the preset area of ​​the nozzle is lower than the bottom of the nozzle, and there is a gap between the bottom of the detection surface light and the surface of the printing medium. That is, the abnormal obstacle detected refers to an obstacle whose height is greater than the gap between the bottom of the nozzle and the surface of the printing medium.

[0045] Step S40: If there is an abnormal obstacle, the preset nozzle anti-collision strategy is executed;

[0046] For details, please refer to Figure 4 , Figure 4 Shows Figure 2 A sub-process of step S40 in the nozzle anti-collision method, wherein the step of executing the preset nozzle anti-collision strategy comprises:

[0047] Step S41: sending a stop operation instruction to the nozzle to stop the nozzle from working;

[0048] The stop working instruction is a signal sent by the detection device to cause the print head to stop printing and moving operations at the same time.

[0049] Step S42: Sending an alarm signal.

[0050] The warning signal is a sound signal or an image signal, and is used to remind the operator to pay attention to the abnormal obstacles in the nozzle movement area and to deal with them in time. The warning signal can be sent through the control panel of the printing device, the connected computer interface, or a special alarm device to ensure that the operator can quickly detect and take corresponding measures.

[0051] In some embodiments, see Figure 2 ,exist Figure 2 Before step S10 in the nozzle anti-collision method shown in , the nozzle anti-collision method further includes:

[0052] Step 50: Obtaining status information of the nozzle;

[0053] The state information refers to the current position information, movement speed, printing state, whether the printhead is in standby or fault mode, and other detailed parameters of the printhead. These state information can be obtained in real time through sensors, encoders or control systems connected to the printhead, ensuring that the printhead anti-collision method can make accurate judgments and responses based on the actual state of the printhead.

[0054] Step 60: judging whether the nozzle is in working state according to the state information;

[0055] The working state refers to the state in which the nozzle is performing printing and moving operations, that is, the nozzle has been started and is in an active working mode.

[0056] If the nozzle is in working state, the step of controlling the light emitting mechanism to emit detection surface light is entered;

[0057] Step 70: If the nozzle is in a non-working state, the light emitting mechanism and the light receiving mechanism are controlled to be turned off.

[0058] When the nozzle is in working state, the anti-collision detection mechanism of step S10 to step S40 is activated to avoid unnecessary detection when the nozzle is idle or not started, thereby saving system resources and reducing the possibility of false alarms.

[0059] In the embodiment of the present invention, by emitting detection surface light to the preset moving area of ​​the nozzle and monitoring the change of the received light intensity value in real time, abnormal obstacles on the moving path of the nozzle can be accurately and timely detected. This method not only improves the safety and reliability of the printing device, avoids nozzle damage or reduction in printing quality due to collision, but also realizes effective protection of the nozzle through intelligent nozzle anti-collision strategy.

[0060] The present invention provides a detection device. Figures 5 to 8 The detection device includes a light emitting mechanism 21, a light receiving mechanism 22, at least one processor 23 and a memory 24, the light emitting mechanism 21 is used to emit detection surface light, the detection surface light passes parallel to the top of the transmission component of the printing device, the transmission direction of the detection surface light above the transmission component is perpendicular to the direction in which the transmission component transmits the printing material to the nozzle of the printing device, the light receiving mechanism 22 is used to receive the detection surface light, at least one processor 23 is respectively connected to the light emitting mechanism 21 and the light receiving mechanism 22, the memory 24 is connected to the at least one processor 23, wherein the memory 24 stores instructions that can be executed by the at least one processor 23, the instructions are executed by the at least one processor 23, so that the at least one processor 23 can execute as follows Figures 2 to 4 The method shown in .

[0061] In some embodiments, see Figure 5 The light emitting mechanism 21 and the light receiving mechanism 22 are respectively located on both sides of the moving direction of the nozzle. The light emitting mechanism 21 emits the detection surface light to the preset moving area of ​​the nozzle, and the detection surface light enters the light receiving mechanism 22 after passing through the preset detection area of ​​the nozzle.

[0062] In some other embodiments, see Figure 6The light emitting mechanism 21 and the light receiving mechanism 22 are respectively located on both sides of the moving direction of the nozzle. The detection device also includes a bevel reflection component 25. The bevel reflection component 25 is used to be set on one side of the nozzle. The light emitting mechanism 21 emits the detection surface light to the bevel reflection component 25. After the detection surface light is emitted by the bevel reflection component 25, it passes through the preset moving area of ​​the nozzle in parallel and then enters the light receiving mechanism 22. Figure 6 In the example of the detection device, the detection surface light directly enters the light receiving mechanism 22 after passing through the preset moving area of ​​the nozzle, the light path is short and the structure is simple.

[0063] In some other embodiments, see Figure 7 and Figure 8 , the light emitting mechanism 21 and the light receiving mechanism 22 are both located on the same side of the moving direction of the nozzle. The light emitting mechanism 21, the light receiving mechanism 22, at least one processor 23 and the memory 24 can be integrated into a photoelectric sensor, such as a laser sensor. The detection device also includes a bevel reflection component 25 and a plane reflection component 26. The bevel reflection component 25 is used to be set on one side of the nozzle, and the plane reflection component 26 is used to be set on the other side of the transmission component of the printing device. The plane reflection component 26 is arranged opposite to the bevel reflection component 25. The plane reflection component 26 is used to reflect the detection surface light reflected by the bevel reflection component 25 back to the bevel reflection component 25. The bevel reflection component 25 reflects the detection surface light reflected by the plane reflection component 26 again and then enters the light receiving mechanism 22. In the case of Figure 6 In the example of the detection device, the emitted detection surface light passes through the preset detection area of ​​the nozzle twice before entering the light receiving mechanism 22, which increases the coverage and detection sensitivity of the detection surface light in the preset moving area of ​​the nozzle. Through two reflections, the detection surface light can more comprehensively scan every corner of the nozzle moving path, thereby more effectively detecting potential abnormal obstacles.

[0064] It is understandable that if Figures 5 to 8 The detection devices can be applied to the scenarios where the distance between the bottom of the nozzle and the surface of the printing medium is different. In the scenario with a smaller distance, the distance between the bottom of the nozzle and the surface of the printing medium is usually a few millimeters, such as Figure 7 In the detection device, the horizontal position of the light emitting mechanism 21 relative to the bevel reflector 25 can be adjusted so that the emitted detection surface light falls on the bevels of the bevel reflector 25 at different heights, thereby adjusting the height of the detection surface light passing through the preset moving area of ​​the nozzle, and the detection surface light is reflected back to the light receiving mechanism 22 through the plane reflector 26, so that adjusting the plane reflector 26 can ensure that the light receiving mechanism 22 accurately receives the detection surface light after the height is adjusted. That is, Figure 7When the detection device needs to adjust the height of the detection surface light passing through the preset moving area of ​​the nozzle, the vertical height adjustment is converted into horizontal indirect adjustment on the detection surface light emitting side, which not only reduces the risk of collision between the components of the detection device and the printing medium during the adjustment process, but also improves the flexibility and accuracy of the adjustment. On the detection surface light receiving side, the plane reflection component 26 is used to ensure that the adjusted detection surface light is received, thereby improving the detection accuracy and reliability of the detection device in scenarios where the distance between the bottom of the nozzle and the surface of the printing medium is small.

[0065] In some embodiments, the distance between the bottom of the nozzle and the surface of the print medium is 3 mm, and the distance between the bottom of the nozzle and the surface of the print medium can be a light curtain with a thickness of 2 mm and a width of 10 mm, or a light curtain with a thickness of 10 mm and a width of 2 mm. The width direction of the light curtain is parallel to the moving direction of the nozzle, and the bottom of the light curtain is flush with the bottom of the nozzle, or the bottom of the light curtain is lower than the bottom of the nozzle and there is a gap between the bottom of the light curtain and the surface of the print medium. Through the above settings, the detection device can accurately detect abnormal obstacles with a height greater than the distance between the nozzle and the print medium, ensuring the safe movement of the nozzle and the printing quality.

[0066] In an embodiment of the present invention, the detection device emits detection surface light through the light emitting mechanism 21, and uses the light receiving mechanism 22 to receive the detection surface light after passing through the preset moving area of ​​the nozzle, thereby realizing real-time monitoring of abnormal obstacles on the moving path of the nozzle, ensuring the accuracy and reliability of the detection, and thus providing effective anti-collision protection for the nozzle.

[0067] The embodiment of the present invention further provides an embodiment of a printing device, which includes a nozzle and the above-mentioned detection device.

[0068] In some embodiments, the printing device also includes a nozzle moving mechanism and a control system, and the nozzle and the detection device are both arranged on the nozzle moving mechanism, and the nozzle moving mechanism is used to drive the nozzle to move. The detection device moves synchronously with the nozzle through the nozzle moving mechanism to ensure that the detection surface light always passes through the preset moving area of ​​the nozzle in parallel, thereby realizing real-time monitoring of abnormal obstacles on the nozzle moving path. The control system is used to receive printing instructions, control the printing operation of the nozzle, coordinate the movement of the nozzle moving mechanism, and communicate with the detection device in real time. The control system can respond quickly according to the abnormal obstacle information provided by the detection device and execute the preset nozzle anti-collision strategy. For example, when the detection device detects an abnormal obstacle, the control system will immediately send a stop working instruction to the nozzle to stop the nozzle from printing and moving operations, and at the same time send an alarm signal to remind the operator to pay attention.

[0069] In the embodiment of the present invention, the printing device achieves efficient and accurate detection and response to abnormal obstacles on the moving path of the nozzle through close cooperation between the detection device and the control system, effectively avoiding the risk of collision between the nozzle and the obstacle, and ensuring the safe operation and printing quality of the printing device.

[0070] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not used as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the protection scope of the claims attached to the present invention.

Claims

1. A method for preventing a printhead from collision, applied to a detection device, wherein the detection device comprises a light emitting mechanism and a light receiving mechanism, wherein the light emitting mechanism is used to emit detection surface light, wherein the detection surface light passes through a preset moving area of ​​the printhead of the printing device in parallel, and the light receiving mechanism is used to receive the detection surface light, wherein the transmission direction of the detection surface light is perpendicular to the moving direction of the printhead, and wherein: The method comprises: Controlling the light emitting mechanism to emit detection surface light, and obtaining an emission light intensity value of the detection surface light emitted by the light emitting mechanism; After the light receiving mechanism receives the detection surface light, detecting a received light intensity value of the detection surface light received by the light receiving mechanism; Determine whether there is an abnormal obstacle in the preset moving area of ​​the nozzle according to the emitted light intensity value and the received light intensity value; If there is an abnormal obstacle, the preset sprinkler head anti-collision strategy will be executed.

2. The method according to claim 1, characterized in that The step of determining whether there is an abnormal obstacle in the preset moving area of ​​the nozzle according to the emitted light intensity value and the received light intensity value further includes: Calculating a ratio of the received light intensity value to the emitted light intensity value; Determining whether the ratio is less than or equal to a preset threshold; If the ratio is less than or equal to the preset threshold, it is determined that an abnormal obstacle exists in the preset moving area of ​​the nozzle; If the ratio is greater than a preset threshold, it is determined that there is no abnormal obstacle in the preset moving area of ​​the nozzle.

3. The method according to claim 1, characterized in that The step of executing the preset nozzle anti-collision strategy further includes: A stop operation instruction is sent to the nozzle to stop the nozzle from operating.

4. The method according to claim 3, characterized in that The step of executing the preset nozzle anti-collision strategy further includes: issuing an alarm signal.

5. The method according to claim 4, characterized in that: The warning signal is a sound signal or an image signal.

6. The method according to claim 1, characterized in that Before the step of controlling the light emitting mechanism to emit detection surface light, the method further includes: Obtaining status information of the nozzle; According to the status information, determining whether the nozzle is in a working state; If the nozzle is in working state, the step of controlling the light emitting mechanism to emit detection surface light is entered.

7. The method according to claim 6, characterized in that The method further comprises: If the nozzle is in a non-working state, the light emitting mechanism and the light receiving mechanism are controlled to be closed.

8. A detection device, applied to a printing device, characterized in that: include: A light emitting mechanism, used for emitting detection surface light, wherein the detection surface light passes through a preset moving area of ​​a nozzle of the printing device in parallel, and a transmission direction of the detection surface light is perpendicular to a moving direction of the nozzle; A light receiving mechanism, used for receiving the detection surface light; At least one processor is communicatively connected to the light emitting mechanism and the light receiving mechanism respectively; A memory is communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in any one of claims 1 to 7.

9. The detection device according to claim 8, characterized in that: The detection device also includes an inclined reflection component; The bevel reflection component is used to be arranged on one side of the nozzle, and the light emitting mechanism emits the detection surface light to the bevel reflection component. After being reflected by the bevel reflection component, the detection surface light passes through the preset moving area of ​​the nozzle in parallel.

10. The detection device according to claim 9, characterized in that: The detection device also includes a plane reflection component; The plane reflection component is used to be arranged on the other side of the nozzle, and the plane reflection component is arranged opposite to the bevel reflection component. The plane reflection component is used to reflect the detection surface light reflected by the bevel reflection component back to the bevel reflection component. The bevel reflection component reflects the detection surface light reflected by the plane reflection component again and then enters the light receiving mechanism.

11. A printing device, characterized in that: It comprises a nozzle and a detection device as described in any one of claims 8 to 10.

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