Coating spray gun capable of measuring gun bed distance and angle and use method thereof

Abstract

The invention discloses a coating spray gun capable of measuring the gun bed distance and angle and a using method thereof.The coating spray gun capable of measuring the gun bed distance and angle comprises a coating machine spray gun set, a laser displacement sensor is fixedly installed on the coating machine spray gun set, and the laser displacement sensor is used for measuring the gun bed distance and the spray gun angle in a non-contact mode. And the laser emission direction of the laser displacement sensor is parallel to the axis of the spray gun. According to the coating spray gun capable of measuring the gun bed distance and angle, the gun bed distance and angle can be fed back in real time in the coating process, the safety risk is reduced, and meanwhile the operation convenience and the detection result accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid preparation coating, and in particular to a coating spray gun capable of measuring gun-bed distance and angle and a method for using the same. Background Art

[0002] In the solid preparation coating process, the spray gun height and angle are key parameters affecting the coating quality. The spray gun height and angle of the coating machine can be adjusted as needed. In the actual preparation process, the distance between the spray gun and the tablet bed (i.e., the gun-bed distance) is a parameter that needs attention during the coating process. In current production, the gun-bed distance is usually measured with a handheld ruler before coating, and the spray gun distance is then adjusted according to the measurement results. The angle of the spray gun can only be roughly judged based on the operator's visual inspection. The existing method has the following defects:

[0003] 1. Inconvenient Operation: The aforementioned operation requires contact measurement within the confined space of the coating machine, which is inefficient and susceptible to subjective factors. 2. Insufficient Precision: Manual measurement is prone to errors, resulting in poor accuracy. 3. Poor Real-Time Performance: The gun bed distance and angle can only be measured by the operator in advance, making real-time monitoring during the coating process impossible. 4. Safety Risk: Direct contact measurement may introduce microorganisms, increasing the risk of exposure to highly active drugs.

[0004] Therefore, the field urgently needs a coating spray gun that can measure the gun-bed distance and angle and its use method, which can provide real-time feedback on the gun-bed distance and angle during the coating process, thereby reducing safety risks while improving the convenience of operation and the accuracy of detection results. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a coating spray gun that can measure the gun-bed distance and angle, including a coating machine spray gun group, on which a laser displacement sensor is fixedly installed. The laser displacement sensor is used for non-contact measurement of the gun-bed distance and the spray gun angle, and the laser emission direction of the laser displacement sensor is parallel to the axis of the spray gun.

[0006] In a specific embodiment, a plurality of laser displacement sensors are provided, and the laser displacement sensors are fixedly mounted on both sides of the spray gun of the coating machine spray gun group.

[0007] In a specific embodiment, when the coating machine spray gun group is a modular structure, the laser displacement sensor is fixedly installed on the top and bottom of the coating machine spray gun group respectively.

[0008] In a specific embodiment, the laser displacement sensor is a high-temperature type with a temperature adaptability range of -10 to 85°C, a measuring range of ±35mm, a repeatability accuracy of ≤35μm, a linearity of ±0.1% FS, a temperature drift of ±0.05% FS / °C, and a response time of ≤1ms.

[0009] In a specific embodiment, the coating machine spray gun group includes a support arm and at least one spray gun, the spray gun is fixedly mounted on the support arm, and the support arm is a horizontal support arm, and the spray gun is a vertical spray gun.

[0010] In a specific embodiment, it also includes a data processing module, which is electrically connected to the laser displacement sensor and is used to read distance data in real time and transmit it to the coating machine numerical control system or local display through the RS232 interface.

[0011] In a specific embodiment, a high-temperature resistant dust cover is provided on the outside of the laser displacement sensor. The high-temperature resistant dust cover is made of quartz glass with a light transmittance of ≥92%, and the inner wall is coated with an anti-reflection film.

[0012] In a specific embodiment, it also includes an audible and visual alarm and a display interface, which are both fixedly installed on one side of the coating machine spray gun group, the audible and visual alarm is electrically connected to the coating machine numerical control system, and the display interface is electrically connected to the coating machine numerical control system.

[0013] Another aspect of the present application provides a method for using a coating spray gun capable of measuring gun-bed distance and angle. The method is based on the aforementioned coating spray gun capable of measuring gun-bed distance and angle. The method includes a gun-bed distance measurement method, comprising the steps of:

[0014] During the coating process, the laser displacement sensor continuously emits a laser beam to calculate the gun-bed distance, and the measured data is transmitted to the coating machine's CNC system in real time;

[0015] The CNC system presets the threshold range of the gun bed distance. When the collected values exceed the threshold range for three consecutive times, the sound and light alarm is triggered, and the distance abnormality is displayed on the display interface, prompting the operator to make manual adjustments.

[0016] In a specific embodiment, the method further includes an angle measurement method, comprising the steps of:

[0017] The data processing module receives the distance data from the two laser displacement sensors, synchronously calculates the displacement difference between the two laser displacement sensors, and calculates the output spray gun angle based on the displacement difference;

[0018] The CNC system presets a threshold range for angle deviation. When the angle deviation value exceeds the threshold range, an audible and visual alarm is triggered, and an angle abnormality is displayed on the display interface, prompting the operator to make manual adjustments.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The coating spray gun provided by the present invention can measure the gun-bed distance and angle, integrates a laser displacement sensor and a control system, and realizes real-time monitoring of the gun-bed distance and angle. Compared with the manual measurement method in the prior art, it reduces human errors and improves measurement efficiency. It has the advantages of high measurement precision and good accuracy. At the same time, it can also adapt well to short-distance measurement, has the beneficial effects of easy operation and good environmental adaptability, and can be well adapted to industrial production.

[0021] 2. The coating spray gun provided by the present invention, which can measure the gun-bed distance and angle, can effectively reduce the risk of personnel exposure for drugs and testing items with higher activity, thereby improving the safety of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a coating spray gun capable of measuring gun-bed distance and angle provided by the present invention installed on a coating machine;

[0023] Figure 2 This is a schematic diagram of the structure of the coating spray gun capable of measuring the gun-bed distance and angle provided by the present invention, viewed from a top view;

[0024] Figure 3 This is a schematic structural diagram of a coating spray gun capable of measuring gun-bed distance and angle provided by the present invention, viewed from the main perspective;

[0025] Figure 4 This is a schematic diagram of the positional relationship between the laser displacement sensor and the spray gun when the spray gun assembly is an integral module from a top-down perspective;

[0026] Figure 5 This is a schematic diagram of the positional relationship between the laser displacement sensor and the spray gun when the spray gun assembly is an integral module from a top-down perspective;

[0027] In the figure, 1-coating machine spray gun group, 2-laser displacement sensor, 3-support arm, 4-spray gun, 5-atomization effect of the spray gun, 6-beam of the laser displacement sensor, 7-display interface. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. The materials, instruments and reagents used in the following examples, unless otherwise specified, can be obtained from commercial sources. The technical means used in the embodiments, unless otherwise specified, are conventional means well known to those skilled in the art.

[0029] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0030] Example 1

[0031] like Figure 1-3 As shown, this embodiment shows a coating spray gun that can measure the gun-bed distance and angle, including a coating machine spray gun group 1. A laser displacement sensor 2 is fixedly installed on the coating machine spray gun group 1. The laser displacement sensor 2 is used for non-contact measurement of the gun-bed distance and the spray gun angle. The laser emission direction of the laser displacement sensor 2 is parallel to the axis of the spray gun. It can be seen from the figure that the atomization effect 5 sprayed by the spray gun is in the same direction and parallel to the light beam 6 of the laser displacement sensor.

[0032] The coating machine spray gun assembly 1 includes a support arm 3 and at least one spray gun 4, which is fixedly mounted on the support arm 3. The support arm 3 is horizontal, and the spray gun 4 is vertical. Multiple laser displacement sensors 2 can be installed, fixedly mounted on either side of the spray gun 4 of the coating machine spray gun assembly 1. During actual installation, the laser displacement sensors 2 can be positioned not only in the middle of the spray gun 4 but also on either side, without affecting the measurement and data transmission of the laser displacement sensors 2.

[0033] like Figure 4-5 As shown, when the coating machine spray gun group 1 is a modular structure, the laser displacement sensor 2 is fixedly installed on the top and bottom of the coating machine spray gun group 1 respectively.

[0034] Laser Displacement Sensor 2 is a high-temperature model. Available in the customized HC series from Wuxi Hongchuan Technology Co., Ltd., it has an operating temperature range of -10°C to 85°C, a measuring range of ±35mm, repeatability of ≤35μm, linearity of ±0.1% FS, temperature drift of ±0.05% FS / °C, and a response time of ≤1ms. Laser Displacement Sensor 2 is protected by a high-temperature dust cover made of quartz glass with a transmittance of ≥92%. The inner wall is coated with an anti-reflection coating to reduce reflection interference and increase the accuracy of detection results.

[0035] The coating spray gun provided in this application is calibrated and calibrated before measurement: first, use a laser tracker (accuracy ≤ 0.01mm / m) to adjust the spray gun to an absolute vertical position, verify that the verticality is ≤ 0.05%, trigger the built-in zero point calibration function of the laser displacement sensor 2, and record the current displacement value as the zero point reference; then, use a standard angle block (30°, 45°, 90°, accuracy ±5') to tilt the spray gun to a preset angle, compare the sensor output value with the theoretical value, and require the repeatability error to be ≤ 0.1° and the linearity error to be ≤ 0.2°.

[0036] The coating spray gun provided by the application also includes a data processing module, which is electrically connected to a laser displacement sensor 2 for real-time reading of distance data, and can also accept angle data. The built-in calibration algorithm of the data processing module is communicated with the coating machine numerical control system bidirectionally via an RS232 communication interface. The data processing module can also include a storage unit, which pre-stores standard angle block parameters (30 °, 45 °, 60 °, 90 °) to complete angle calibration. Also included are an audible and visual alarm and a display interface 7, which are all fixedly mounted on a side of the coating machine spray gun group 1, and the audible and visual alarm and the display interface 7 are all electrically connected to the coating machine numerical control system.

[0037] The present application provides a method for using a coating spray gun capable of measuring gun-bed distance and angle. The method for measuring gun-bed distance comprises the following steps:

[0038] During the coating process, the laser displacement sensor 2 continuously emits a laser beam, calculates the gun-bed distance, and outputs the distance value to the coating machine CNC system in a 1ms cycle;

[0039] The numerical control system presets a threshold range for the gun bed distance. When the collected values exceed the threshold range for three consecutive times, the sound and light alarm is triggered, and the distance abnormality is displayed on the display interface 7, prompting the operator to manually adjust it.

[0040] The angle measurement method comprises the steps of:

[0041] Start the laser tracker, move the target ball to the head of the spray gun 4, adjust the spray gun 4 until the tracker displays a verticality of 0.04%, and press the sensor to calibrate the zero point; place the standard angle block under the spray gun 4 so that the spray gun 4 fits the angle block. The two laser displacement sensors 2 output the distance value to the data processing module, and the data processing module calculates the angle based on the displacement difference for calibration.

[0042] After calibration, when the angle is detected during the coating process, the data processing module receives the distance data from the two laser displacement sensors 2, calculates the displacement difference between the two laser displacement sensors 2, and calculates the output spray gun angle based on the displacement difference;

[0043] The numerical control system presets a threshold range for the angle deviation. When the angle deviation value exceeds the threshold range, the sound and light alarm is triggered, and the angle abnormality is displayed on the display interface 7, prompting the operator to make manual adjustments.

[0044] In summary, the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coating spray gun capable of measuring gun bed distance and angle, characterized in that: It includes a coating machine spray gun group, on which a laser displacement sensor is fixedly installed. The laser displacement sensor is used for non-contact measurement of the gun bed distance and the spray gun angle. The laser emission direction of the laser displacement sensor is parallel to the spray gun axis.

2. The coating spray gun capable of measuring gun bed distance and angle according to claim 1, characterized in that: There are multiple laser displacement sensors, which are fixedly mounted on both sides of the spray gun of the coating machine spray gun group.

3. The coating spray gun capable of measuring gun bed distance and angle according to claim 2, characterized in that: When the coating machine spray gun group is a modular structure, the laser displacement sensors are fixedly installed on the top and bottom of the coating machine spray gun group respectively.

4. The coating spray gun capable of measuring gun bed distance and angle according to claim 1, characterized in that: The laser displacement sensor is a high-temperature type with a temperature adaptability range of -10 to 85°C, a measuring range of ±35mm, a repeatability accuracy of ≤35μm, a linearity of ±0.1%FS, a temperature drift of ±0.05%FS / °C, and a response time of ≤1ms.

5. The coating spray gun capable of measuring gun bed distance and angle according to claim 1, characterized in that: The coating machine spray gun group includes a support arm and at least one spray gun, wherein the spray gun is fixedly mounted on the support arm, and the support arm is a horizontal support arm, and the spray gun is a vertical spray gun.

6. The coating spray gun capable of measuring gun bed distance and angle according to claim 1, characterized in that: It also includes a data processing module, which is electrically connected to the laser displacement sensor and is used to read distance data in real time and transmit it to the coating machine numerical control system or local display through the RS232 interface.

7. The coating spray gun capable of measuring gun bed distance and angle according to claim 1, characterized in that: The outer side of the laser displacement sensor is provided with a high temperature resistant dust cover, the material of the high temperature resistant dust cover is quartz glass with a light transmittance of ≥92%, and the inner wall is coated with an anti-reflection film.

8. The coating spray gun capable of measuring gun-bed distance and angle according to claim 1, characterized in that: It also includes an audible and visual alarm and a display interface, which are both fixedly mounted on one side of the coating machine spray gun group. The audible and visual alarm is electrically connected to the coating machine's numerical control system, and the display interface is electrically connected to the coating machine's numerical control system.

9. A method for using a coating spray gun capable of measuring gun bed distance and angle, characterized in that: The method is based on the coating spray gun capable of measuring the gun-bed distance and angle according to any one of claims 1 to 8, and the method includes a gun-bed distance measurement method, including the steps of: During the coating process, the laser displacement sensor continuously emits a laser beam to calculate the gun-bed distance, and the measured data is transmitted to the coating machine's CNC system in real time; The CNC system presets the threshold range of the gun bed distance. When the collected values exceed the threshold range for three consecutive times, the sound and light alarm is triggered, and the distance abnormality is displayed on the display interface, prompting the operator to make manual adjustments.

10. The method for using the coating spray gun capable of measuring gun-bed distance and angle according to claim 9, characterized in that: The method also includes an angle measurement method, comprising the steps of: The data processing module receives the distance data from the two laser displacement sensors, synchronously calculates the displacement difference between the two laser displacement sensors, and calculates the output spray gun angle based on the displacement difference; The CNC system presets a threshold range for angle deviation. When the angle deviation value exceeds the threshold range, an audible and visual alarm is triggered, and an angle abnormality is displayed on the display interface, prompting the operator to make manual adjustments.

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