Liquid material construction equipment and liquid valve detection method

Abstract

The invention provides liquid material application equipment and a liquid valve detection method, and the method comprises the steps: receiving sound generated by a liquid valve through a sound receiving group in a process of applying liquid material to a workpiece through the liquid valve, so as to obtain sound data; processing the sound data into a time-frequency diagram comprising different occurrence times, frequencies and volumes by a processing device; and enabling the processing device to analyze the time point when the volume of the time-frequency diagram is abnormal so as to generate a volume abnormal result, thereby detecting the service life of the liquid valve. The sound data can be obtained through the detection device, and the design that the processing device can process and analyze the sound data is matched, so that the fact that the liquid valve is about to break down can be known from the abnormal change of the sound data of the liquid valve.

Description

Technical Field

[0001] This invention relates to a liquid material application device and a liquid valve testing method, particularly to a liquid material application device and a liquid valve testing method that includes a liquid valve for extruding liquid material. Background Technology

[0002] Patent No. I837733, "Liquid Coating Equipment, Liquid Extrusion Device and Temperature Sensing Method Thereof", discloses a liquid valve, which includes: a liquid chamber module, including a liquid chamber seat with a liquid chamber and a valve nozzle, and a connecting pipe for guiding liquid material into the liquid chamber; and a drive module, which includes a drive mechanism that can drive a lever to swing up and down with a piezoelectric block, thereby causing a plunger of the liquid chamber module to move up and down, and squeezing the liquid material in the liquid chamber from the valve nozzle to coat a workpiece.

[0003] After a period of use, the piezoelectric block, lever, plunger, and valve nozzle of the liquid valve will all experience wear, leading to valve malfunction and causing the workpiece to be coated as a defective product. Therefore, the liquid valve requires regular maintenance. Although regular maintenance can reduce the probability of valve malfunction, the components replaced after maintenance may still be usable, resulting in unnecessary waste. Furthermore, the liquid valve may malfunction before regular maintenance, causing the workpiece to still be coated as a defective product. Therefore, how to determine whether the liquid valve is about to malfunction has become a focus of research in the industry. Summary of the Invention

[0004] Therefore, the object of the present invention is to provide a liquid valve detection method that can improve upon at least one of the disadvantages of the prior art.

[0005] Therefore, the liquid valve detection method of the present invention includes: during the process of a liquid valve applying liquid material to a workpiece, receiving the sound generated by the liquid valve with a sound receiving group to obtain sound data, and capturing an image of the liquid valve with an imager to obtain image data. A processor processes the sound data into a first image, processes the image data into a second image, and overlays the first image onto the second image to generate a third image. A display shows the third image.

[0006] Another object of the present invention is to provide a liquid valve detection method that can improve upon at least one of the disadvantages of prior art.

[0007] Therefore, the liquid valve detection method of the present invention includes: during the process of a liquid valve applying liquid material to a workpiece, receiving the sound generated by the liquid valve with a sound receiving group to obtain sound data, and processing the sound data into a time-frequency graph including different occurrence times, frequencies, and volumes with a processing device. The processing device analyzes the time points of abnormal volume in the time-frequency graph to generate a volume abnormality result, thereby detecting the service life of the liquid valve.

[0008] Another object of the present invention is to provide a liquid application device that can improve upon at least one of the disadvantages of the prior art.

[0009] Therefore, the liquid material application equipment of the present invention is suitable for applying liquid material to a workpiece, and is equipped with a conveying device, a liquid material application device, a detection device, a processing device, and a display.

[0010] The conveying device is mounted on a machine platform and used to convey the workpiece to a preset position. The liquid application device includes a moving mechanism mounted on the machine platform and a liquid valve mounted on the moving mechanism. The liquid valve can be driven by the moving mechanism to move to the preset position to apply liquid to the workpiece.

[0011] The detection device includes a receiver group capable of receiving the sound generated by the liquid valve to obtain sound data, and an image sensor capable of capturing an image of the liquid valve to obtain image data. A processing device is signal-connected to the detection device and includes a processor. The processor can process the sound data into a first image, process the image data into a second image, and overlay the first image onto the second image to generate a third image. A display is signal-connected to the processing device and can display the third image.

[0012] Another object of the present invention is to provide a liquid material application device that can be used to perform any of the liquid valve detection methods described above.

[0013] The advantage of this invention is that, since the liquid valve will generate abnormal noise before a malfunction occurs, the detection device can obtain the sound data, and the design of the processing device can process and analyze the sound data. Therefore, it is possible to know that the liquid valve is about to malfunction from the abnormal changes in the sound data of the liquid valve. Attached Figure Description

[0014] Other features and effects of the invention will be clearly shown in the embodiments with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a block diagram illustrating one embodiment of the liquid material application device of the present invention;

[0016] Figure 2 It is an incomplete perspective view illustrating the configuration of this embodiment on a machine platform;

[0017] Figure 3 It is an incomplete front view illustrating the field of view of an imager of a detection device in this embodiment, but a display, an alarm and a processing device are not shown.

[0018] Figure 4 It is a block diagram illustrating the signal connection relationship between the detection device, the processing device, and the display in this embodiment;

[0019] Figure 5 This is a left-side view illustrating a liquid valve in this embodiment;

[0020] Figure 6 This is a schematic diagram illustrating the situation where the liquid valve of this embodiment produces an initial abnormal noise, and the display shows a third image.

[0021] Figure 7 This is a schematic diagram illustrating the aggravation of the abnormal noise of the liquid valve in this embodiment, and the display showing the third image;

[0022] Figure 8 It is a spectrum diagram illustrating sound data at time t=1 in this embodiment;

[0023] Figure 9 It is a spectrum diagram illustrating sound data at time t=32 in this embodiment;

[0024] Figure 10 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=1 to t=32;

[0025] Figure 11 It is a spectrum diagram illustrating sound data at time t=48 in this embodiment;

[0026] Figure 12 It is a spectrum diagram illustrating sound data at time t=64 in this embodiment;

[0027] Figure 13 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=33 to t=64;

[0028] Figure 14 It is a spectrum diagram illustrating sound data at time t=88 in this embodiment;

[0029] Figure 15 It is a spectrum diagram illustrating sound data at time t=96 in this embodiment;

[0030] Figure 16 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=65 to t=96;

[0031] Figure 17 It is a spectrum diagram illustrating sound data at time t = 108 in this embodiment;

[0032] Figure 18 It is a spectrum diagram illustrating sound data at time t=128 in this embodiment;

[0033] Figure 19 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=97 to t=128;

[0034] Figure 20 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=1 to t=64; and

[0035] Figure 21 This is a time-frequency diagram illustrating the sound conditions of this embodiment from time t=61 to t=124.

[0036] [Symbol Explanation]

[0037] 100: Liquid material application equipment

[0038] 2: Conveying device

[0039] 20: Preset position

[0040] 21: Track mechanism

[0041] 22: Transmission mechanism

[0042] 3: Liquid material application device

[0043] 31: Mobile mechanism

[0044] 311: First orbital unit

[0045] 312: Second orbital unit

[0046] 313: Transfer Unit

[0047] 32: Liquid valve

[0048] 33: Connector

[0049] 34: Valve chamber structure

[0050] 35: Liquid Chamber Structure

[0051] 351: Liquid chamber seat

[0052] 352: Connector

[0053] 353: Valve nozzle

[0054] 354: Liquid Chamber

[0055] 355: Spit out

[0056] 36: Driving Structure

[0057] 361: Actuator

[0058] 362: Leverage

[0059] 363: Plunger

[0060] 4: Detection device

[0061] 41: base body

[0062] 411: Installation wall

[0063] 42: Image capture device

[0064] 43: Radio Group

[0065] 431: Radio

[0066] 5: Monitor

[0067] 6: Alarm

[0068] 7: Processing device

[0069] 71: Processor

[0070] 72: Storage

[0071] 91: Machine

[0072] 92: Liquid cylinder

[0073] 93: Workpiece

[0074] A: Area

[0075] B: Region

[0076] F: Area

[0077] I1: First Image

[0078] I2: Second Image

[0079] I3: Third Image Detailed Implementation

[0080] See Figure 1 , 2 3. One embodiment of the liquid material application equipment 100 of the present invention is suitable for use on a machine base 91, for receiving liquid material provided by a liquid cylinder 92, and for outputting the liquid material to apply to a workpiece 93. The liquid material application equipment 100 includes a conveying device 2, a liquid material application device 3, a detection device 4, a display 5, an alarm 6, and a processing device 7.

[0081] The conveying device 2 is provided with a track mechanism 21 mounted on the machine base 91 and a transmission mechanism 22 provided on the track mechanism 21. The transmission mechanism 22 can be used to carry the workpiece 93 to be performed and can be controlled to drive the workpiece 93 to be performed to be positioned at a preset position 20 on which the liquid material is expected to be applied.

[0082] The liquid application device 3 is provided with a moving mechanism 31 mounted on the machine base 91, and a liquid valve 32 mounted on the moving mechanism 31 and driven by the moving mechanism 31 to move to the preset position 20.

[0083] The moving mechanism 31 includes two first track units 311 extending forward and backward and spaced apart laterally on the machine base 91 and located above the conveying device 2; a second track unit 312 extending laterally across the first track units 311; and an adjustment unit 313 mounted on the second track unit 312 for mounting the liquid valve 32. The second track unit 312 can be driven to move forward and backward (X direction) along the first track unit 311. The adjustment unit 313 can be driven to move left and right (Y direction) along the second track unit 312, and can drive the liquid valve 32 to move up and down (Z direction) relative to the conveying device 2.

[0084] Since there are many ways to use the conveying device 2 to transport the workpiece 93 and the moving mechanism 31 to adjust the liquid valve 32, and these are not the focus of the improvement of the present invention, they will not be described in detail here.

[0085] See Figure 2 , 3 5. The liquid valve 32 is provided with a connecting seat 33 installed on the front side of the adjusting unit 313, a valve chamber structure 34 installed on the front side of the connecting seat 33, a liquid chamber structure 35 installed on the bottom side of the valve chamber structure 34, and a driving structure 36 installed inside the valve chamber structure 34 and inside the liquid chamber structure 35.

[0086] The liquid chamber structure 35 includes a liquid chamber seat 351 installed on the bottom side of the valve chamber structure 34, a guide seat 352 installed on the front side of the liquid chamber seat 351 for connecting the liquid cylinder 92 and the liquid chamber seat 351, and a valve nozzle 353 installed on the bottom side of the liquid chamber seat 351. The liquid chamber seat 351 has a liquid chamber 354. The valve nozzle 353 has an outlet 355 that extends vertically and connects the liquid chamber 354 to the outside.

[0087] The drive structure 36 includes an actuator 361 extending vertically within the valve chamber structure 34 and actuable to provide driving force; a lever 362 located within the valve chamber structure 34 and amplified by the driving force of the actuator 361; and a plunger 363 extending vertically within the valve chamber structure 34 and extending into the liquid chamber 354. The plunger 363 can be driven by the lever 362 to selectively contact the valve nozzle 353, thereby squeezing the liquid material in the liquid chamber 354 and discharging it through the discharge port 355.

[0088] It should be noted that in this embodiment, the actuator 361 is a piezoelectric block whose volume can be enlarged or reduced after being energized, that is, the liquid valve 32 is a piezoelectric liquid valve. However, this is not a limitation in implementation, and it can also be a pneumatic liquid valve or a screw liquid valve or other types of liquid valves with different drive types.

[0089] See Figure 2 , 3 4. The detection device 4 is fixed to the moving mechanism 31 and has a body 41 with the first track unit 311 on the left and a mounting wall 411 facing the preset position 20, an image sensor 42 installed in the center of the mounting wall 411, and a sound receiving group 43 surrounding the image sensor 42 and installed on the mounting wall 411.

[0090] The field of view of the image sensor 42 is directed toward the preset position 20 (as shown). Figure 3 The image sensor 42 is located in region F and can capture an image of the liquid valve 32 to obtain image data. The sound receiver 43 can receive the sound generated by the liquid valve 32 to obtain sound data, and is provided with a plurality of receivers 431 disposed around the image sensor 42. The sound data includes a plurality of sound sub-data obtained by the receivers 431 respectively receiving the sound generated by the liquid valve 32. It should be noted that the sound generated by the liquid valve 32 is produced by the contact between the plunger 363 and the valve nozzle 353, the lever 362 and the plunger 363, or the actuator 361 and the lever 362.

[0091] In this embodiment, the detection device 4 is fixed to the first track unit 311 on the left side of the moving mechanism 31. However, in practice, as long as the detection device 4 can achieve the purpose of taking an image of the liquid valve 32 and receiving the sound generated by the liquid valve 32 without affecting the application of liquid material to the workpiece 93, the setting position of the detection device 4 is not limited to this. It can also be mounted on the machine base 91 or set on an adjustable seat with a movable angle (not shown).

[0092] The display 5 and the alarm 6 are mounted on the machine 91 and can be viewed by the user and used to generate alarms for the user, respectively. In this embodiment, the alarm 6 is a buzzer that can generate an alarm sound, but in practice it can also be an alarm light that can generate different warning light signals.

[0093] See Figure 1 , 4 The processing device 7 is mounted on the machine base 91 and is signal connected to the detection device 4, the display 5 and the alarm 6. It is equipped with a processor 71 and a storage device 72.

[0094] The processor 71 can process the sound data into a first image I1. Specifically, the sound data includes different frequencies and volumes. The processor 71 extracts processed sound data within a predetermined frequency range from the sound data, and then calculates the direction of the sound generated by the liquid valve 32 by combining the distribution position of the microphone 431 with the processed sound data. Next, it calculates the volume values ​​of each frequency of the processed sound data and the corresponding volume values, and then processes the calculated volume into the first image I1 by representing it with color images of different color systems (as shown in the image). Figure 6 ).

[0095] The processor 71 can also process the image data into a second image I2 displayed as a grayscale image, and superimpose the first image I1 onto the second image I2 to generate a third image I3.

[0096] The processor 71 will also analyze the volume of the processed sound data and, if it meets an alarm condition, control the alarm 6 to sound an alarm.

[0097] The processor 71 can also process the sound data into a spectrum diagram (e.g., including different frequencies and volumes) Figure 8 ), or a time-frequency diagram including different occurrence times, frequencies, and volumes (e.g. Figure 10 The spectrum and the time-frequency graph are stored in the memory 72.

[0098] It should be further noted that the predetermined frequency range is selected based on the characteristics of the device under test and the testing requirements. In this embodiment, the predetermined frequency range is 10KHz to 80KHz, which can filter out some sounds that do not belong to the liquid valve 32. However, this is not a limitation in practice, and the sound data obtained by the receiver group 43 can also be directly used for analysis and processing.

[0099] In addition, in this embodiment, the display 5, the alarm 6 and the processing device 7 are mounted on the machine 91. However, in practice, the mounting positions of the display 5, the alarm 6 and the processing device 7 are not limited to the above-mentioned manner, as long as the display 5 and the alarm 6 can achieve the purpose of providing viewing for users and generating alarms, and the processing device 7 can achieve the purpose of receiving the image data and the sound data from the detection device 4.

[0100] See Figure 6 , 7 An embodiment of the liquid valve detection method performed by the liquid material application equipment 100 of the present invention includes the following steps:

[0101] During the process of applying liquid material to the workpiece 93 by the liquid valve 32, the sound receiving group 43 receives the sound generated by the liquid valve 32 to obtain the sound data, and the image sensor 42 captures an image of the liquid valve 32 to obtain the image data.

[0102] The processor 71 processes the audio data into the first image I1 and the image data into the second image I2, and then overlays the first image I1 onto the second image I2 to generate the third image I3. The audio data includes multiple different frequencies and volumes. The processor 71 extracts the processed audio data falling within a predetermined frequency range from the audio data, and then processes the processed audio data into the first image I1 by representing it as a color image with different color schemes according to the volume level. The second image I2 is displayed as a grayscale image.

[0103] The display 5 is made to show the third image I3, so that the user can intuitively discover whether the liquid valve 32 is producing abnormal noise through the visual image of the third image I3.

[0104] When the processor 71 analyzes the volume of the processed sound data and finds it to meet the alarm condition, the alarm 6 sounds an alarm. In this embodiment, the alarm condition refers to the volume of the processed sound data being greater than 60 dB(A) or greater than 90 dB(A). However, in practice, the alarm condition can also be that the increase in the volume of the processed sound data is greater than a predetermined value.

[0105] The processor 71 processes the sound data into a spectrum (e.g., a spectrum of different frequencies and volumes) that includes the sound data. Figure 8 ).

[0106] See Figure 1 , 8 10. Another embodiment of the liquid valve detection method performed by the liquid material application equipment 100 of the present invention includes the following steps:

[0107] During the process of the liquid valve 32 applying liquid material to the workpiece 93, the sound receiver 43 receives the sound generated by the liquid valve 32 to obtain the sound data, and the processing device 7 processes the sound data into a time-frequency diagram including different occurrence times, frequencies, and volumes. Figure 10 ).

[0108] The processing device 7 analyzes the time points when the volume of the time-frequency graph becomes abnormal and generates the abnormal volume result, thereby detecting the service life of the liquid valve 32.

[0109] When the processing device 7 produces the abnormal volume result, the alarm 6 will sound an alarm.

[0110] The following will explain how to detect the service life of the liquid valve 32 by using the sound data received by the radio group 43 at different times.

[0111] Figure 8 and Figure 9 The spectrum diagrams corresponding to the sound data obtained at times t=1 and t=32 during the initial use of the brand-new liquid valve 32. Figure 10 This is the time-frequency diagram corresponding to the sound data obtained from time t=1 to t=32.

[0112] See Figure 8 , 10 The processing device 7 analyzes the frequencies and corresponding volume levels (e.g., at time t=1) included in the sound data. Figure 8 ), and draw different colored dots according to the volume level. Figure 10 The image shows region A. In this embodiment, the volume is graded from low to high using cool colors → warm colors → bright colors. Specifically, in... Figure 8 In the above, the volume at frequencies of 10kHz, 30kHz, 50kHz, and 80kHz is less than 30dB(A). Figure 10 In region A, the volume levels corresponding to the aforementioned frequencies are represented by blue dots. The volume levels for frequencies of 20kHz, 40kHz, 60kHz, and 70kHz are all between 30 and 60 dB(A). Figure 10 In region A, the volume corresponding to the above frequencies is represented by red dots.

[0113] Please refer to the following: Figure 9 The volume level corresponding to each frequency is relative to Figure 8 All frequencies showed slight variations, but the volume at 10kHz, 30kHz, 50kHz, and 80kHz remained below 30dB(A), while the volume at 20kHz, 40kHz, 60kHz, and 70kHz remained between 30 and 60dB(A). Therefore, the corresponding values ​​are plotted on... Figure 10The colors of the dots in region B are the same as the colors of the dots in region A.

[0114] Figure 11 and Figure 12 The spectrum diagrams are the sound data obtained at times t=48 and t=64 during the early stage of use of the liquid valve 32. Figure 13 This is the time-frequency diagram corresponding to the sound data obtained between t=48 and t=64.

[0115] See Figure 11 , 12 Compared to Figure 9 It can be observed that the volume at 60kHz has increased to between 60 and 90 dB(A), therefore... Figure 13 The dots with a frequency of 60kHz and a time interval of t=48-64 are represented by yellow dots. It is speculated that this situation may be due to the fact that the liquid valve 32 has been used for a period of time, and the wear and tear has reached a certain level, causing abnormal noise.

[0116] Figure 14 and Figure 15 The spectrum diagrams are the sound data obtained at times t=88 and t=96 during the later stages of use of the liquid valve 32. Figure 16 This is the time-frequency diagram corresponding to the sound data obtained between t=65 and t=96.

[0117] See Figure 14 , 15 Compared to Figure 12 It can be observed that the volume at frequencies of 70kHz and 80kHz is also increased, ranging from 60 to 90dB(A). Therefore, in Figure 16 The dots at frequencies of 70kHz and 80kHz with times t = 88-96 are yellow. This suggests that the abnormal noise from valve 32 may be gradually worsening.

[0118] Figure 17 and Figure 18 The above are the spectrum diagrams corresponding to the sound data obtained at times t=108 and t=128 during the later stages of use of the liquid valve 32. Figure 19 This is the time-frequency diagram corresponding to the sound data obtained between t=97 and t=128.

[0119] See Figure 17 , 18 Compared to Figure 15 It can be observed that the volume at 60kHz further increases to over 90dB(A), therefore... Figure 19In the diagram, dots with a frequency of 60kHz and a time interval of t=108-128 are white. This indicates that the abnormal noise from valve 32 is quite severe and requires replacement.

[0120] Figure 20 This is the time-frequency diagram corresponding to the sound data obtained from time t=1 to t=64. Figure 21 This is the time-frequency diagram corresponding to the sound data obtained between t=61 and t=124.

[0121] When using this invention, it is possible to collect sound data at each time point during the operation of the liquid valve 32 while it is applying liquid to the workpiece 93, and generate sound data such as... Figure 20 , Figure 21 The time-frequency diagram is obtained. Furthermore, by collecting the time-frequency diagrams of various liquid valves 32 of the same model, the remaining lifespan of the liquid valve 32 of that model can be predicted using big data analysis.

[0122] by Figure 20 For example, at time t=48, the processing device 7 will produce the abnormal volume result, and it can be determined that the liquid valve 32 is slightly abnormal and has a remaining lifespan of 80%. That is, the remaining lifespan of the liquid valve 32 can be inferred from the changes in volume at various frequencies. Furthermore... Figure 21 For example, at time t=88, the processing device 7 will produce the abnormal volume result and determine that the liquid valve 32 is in an increasing abnormality and has a remaining lifespan of 50%. At time t=108, the processing device 7 will produce the abnormal volume result and determine that the liquid valve 32 is in a serious abnormality and has a remaining lifespan of 20%.

[0123] In summary, since the liquid valve 32 will generate abnormal noise before a malfunction occurs, the detection device 4 can obtain this sound data, and the design of the processing device 7 can process and analyze this sound data. This allows for early detection of abnormal changes in the sound data of the liquid valve 32, indicating an impending malfunction. Therefore, the liquid material application device 100 and the liquid valve detection method of the present invention are indeed a highly innovative and practical creation, and thus effectively achieve the objectives of the present invention.

[0124] The above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification of the present invention shall still fall within the scope of the patent of the present invention.

Claims

1. A method for detecting a liquid valve, comprising: During the process of applying liquid material to a workpiece using a liquid valve, a sound receiver group receives the sound generated by the liquid valve to obtain sound data, and an image sensor captures an image of the liquid valve to obtain image data. A processor processes the audio data into a first image, processes the image data into a second image, and overlays the first image onto the second image to generate a third image; and To display the third image on a monitor.

2. The liquid valve detection method as described in claim 1, wherein, The sound data includes different frequencies and volumes. The processor extracts processed sound data within a predetermined frequency range from the sound data, and then processes the processed sound data into the first image by representing it with color images of different color systems according to the volume. The second image is displayed as a grayscale image.

3. The liquid valve detection method as described in claim 2, wherein, When the processor analyzes the volume of the processed sound data and it meets an alarm condition, an alarm is triggered.

4. The liquid valve detection method as described in claim 1, wherein, The processor processes the sound data into a spectrum that includes different frequencies and volumes.

5. A method for detecting a liquid valve, comprising: During the process of a liquid valve applying liquid material to a workpiece, a sound receiver group receives the sound generated by the liquid valve to obtain sound data, and a processing device processes the sound data into a time-frequency diagram including different occurrence times, frequencies, and volumes; and The processing device analyzes the time points when the volume of the time-frequency graph becomes abnormal and generates a volume abnormality result, thereby detecting the service life of the liquid valve.

6. The liquid valve detection method as described in claim 5, wherein, When the processing device produces the abnormal volume result, it causes an alarm to sound.

7. A liquid application device, suitable for applying liquid to a workpiece, and equipped with: A conveying device is mounted on a machine platform and used to convey the workpiece to a preset position; A liquid material application device includes a moving mechanism mounted on the machine base and a liquid valve mounted on the moving mechanism. The liquid valve can be driven by the moving mechanism to move to the preset position to apply liquid material to the workpiece. A detection device includes a receiver group capable of receiving the sound generated by the liquid valve to obtain sound data, and an imager capable of capturing an image of the liquid valve to obtain image data. A processing device, signal-connected to the detection device, and equipped with a processor, which processes the sound data into a first image, processes the image data into a second image, and overlays the first image onto the second image to generate a third image; and A display, signal-connected to the processing device, is available for displaying the third image.

8. The liquid material application equipment as described in claim 7, wherein, The detection device is fixed to the moving mechanism or the machine platform, and the field of view of the image sensor is oriented towards the preset position.

9. The liquid material application equipment as described in claim 8, wherein, The radio receiver is equipped with multiple microphones located around the image sensor. Each microphone can receive the sound generated by the liquid valve to obtain multiple sound sub-data. The processor can calculate the direction of the sound generated by the liquid valve based on the distribution of the microphones and the sound sub-data.

10. The liquid material application equipment as described in claim 7, wherein, The liquid valve has a liquid chamber structure and a drive structure. The liquid chamber structure has a liquid chamber for containing liquid material and a valve nozzle located in the liquid chamber. The valve nozzle has an outlet connecting the liquid chamber to the outside. The drive structure has an actuator that can be actuated to provide driving force, a lever that can be driven by the driving force to amplify the driving force of the actuator, and a plunger that can be driven by the lever. The plunger can be driven to move up and down to selectively contact the valve nozzle to squeeze the liquid material in the liquid chamber out through the outlet. The sound generated by the liquid valve is generated when the plunger contacts the valve nozzle, the lever contacts the plunger, or the actuator contacts the lever.

11. The liquid material application equipment as described in claim 7, wherein, The processing device also includes a storage unit, in which the processor can process the sound data into a spectrogram or a time-frequency diagram and store it.

12. The liquid material application equipment as described in claim 7, wherein, The audio data includes different frequencies and volumes. The processor will process the audio data into the first image by representing it as a color image with different color schemes according to the volume level.

13. The liquid material application equipment as described in claim 12, wherein, The liquid application equipment is also equipped with an alarm connected to the processing device. When the processor analyzes the volume of the sound data and it meets an alarm condition, it controls the alarm to sound an alarm.

14. A liquid material application device, which can be used to perform the liquid valve detection method as described in any one of claims 1 to 6.

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