A strapping machine strapping quality detection device

Abstract

This application relates to a strapping machine strapping quality detection device, belonging to the technical field of strapping machines. It includes: a light source module for illuminating a marked position, with the locking position of the cable tie coinciding with the marked position; a spectral analysis module for receiving the reflected light signal from the marked position and converting the light signal into an electrical signal representing its spectral characteristics; a processing control module, whose signal input terminal is connected to the signal output terminal of the spectral analysis module, for receiving the electrical signal; and an alarm module connected to the signal output terminal of the processing control module. The processing control module is configured to: determine whether the cable tie is located at the preset marked position based on the characteristics of the reflected light spectrum, send a trigger signal to the alarm module, and drive the alarm module to issue an alarm signal. This application has the effect of detecting the strapping quality.

Description

Technical Field

[0001] This application relates to strapping machines, and more particularly to a strapping machine strapping quality detection device. Background Technology

[0002] Strapping machines, as key equipment in modern industrial production and logistics transportation, are widely used for the grouping and packaging of various objects. Their working principle typically involves wrapping the object with strapping tape (such as PET, PP, or steel tape), then joining the ends of the tape using methods such as heat sealing, friction, or clips. A tensioning mechanism applies a certain pre-tension force, ultimately forming a robust, constrained whole to ensure the stability, safety, and integrity of the goods during storage and transportation.

[0003] Currently, although mainstream automatic strapping machines have automated steps such as strap feeding, tightening, joining, and cutting, they still lack efficient and reliable online automatic detection methods for the final strapping quality, namely the firmness of the strap joint (heat melting point) and whether the actual pressure (tension) applied by the strapping to the goods meets the preset standards. Summary of the Invention

[0004] The purpose of this application is to provide a device for detecting the quality of strapping in a strapping machine.

[0005] This application provides a strapping machine strapping quality detection device, which adopts the following technical solution: The detection device includes: The light source module is used to illuminate the marked position, and the locking position of the cable tie coincides with the marked position; A spectral analysis module is used to receive the reflected light signal from the marked location and convert the light signal into an electrical signal representing its spectral characteristics; The processing control module has its signal input terminal connected to the signal output terminal of the spectral analysis module, and is used to receive the electrical signal. The alarm module is connected to the signal output terminal of the processing control module; The processing control module is configured to: determine whether the cable tie is located at the marked position based on the spectral characteristics of the reflected light signal, send a trigger signal to the alarm module, and drive the alarm module to issue an alarm signal.

[0006] By adopting the above technical solution, if the cable tie is not heat-fused and fixed or the actual pressure (tension) applied by the cable tie to the battery is insufficient, the cable tie will sink and thus disengage from the locking position. By analyzing the spectral characteristics of the reflected light to indirectly judge the cable tie binding quality, efficient and reliable online detection of the binding process is achieved, and an alarm can be triggered in real time, effectively preventing defective products from flowing into the next process.

[0007] Optionally, the cable tie is pre-configured to have a first reflection characteristic for the emitted light from the light source module; the marking position is configured to have a second reflection characteristic that is significantly different from the first reflection characteristic; the processing control module determines whether the spectrum of the reflected light signal conforms to the first reflection characteristic or the second reflection characteristic by identifying it.

[0008] By adopting the above technical solution, and by pre-setting the cable ties and marking positions to have significantly different reflective characteristics, and by basing the judgment logic on recognizing these two characteristics, the judgment criteria of the detection device are made very clear and stable. This design greatly improves the accuracy of judgment and anti-interference ability, avoiding misjudgments caused by slight changes in ambient light or small fluctuations in distance.

[0009] Optionally, the first reflection characteristic is that the main wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the main wavelength of the reflected light corresponds to the white or the original wavelength of the light source module; when the spectral analysis module detects that the main wavelength of the reflected light is green, the processing control module determines that the cable tie is located at a preset position.

[0010] By adopting the above technical solution, most existing cable ties are green, and green and white are significantly different in the spectrum, making them very easy to distinguish.

[0011] Optionally, the first reflection characteristic is that the main wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the main wavelength of the reflected light corresponds to the white or the original wavelength of the light source module; when the main wavelength of the reflected light detected by the spectral analysis module conforms to the second reflection characteristic / or does not conform to the first emission characteristic, the processing control module determines that the cable tie is not located at the marked position.

[0012] By adopting the above technical solution, the alarm module's triggering conditions are more complete, ensuring that the system can make a correct "unqualified" judgment and alarm under any unexpected spectral conditions, further enhancing the comprehensiveness and reliability of the detection device.

[0013] Optionally, the spectral analysis module is a filter-based photoelectric sensor, which includes at least one photodetector and an optical filter disposed in the optical path of the photodetector.

[0014] Optionally, the filter-based photoelectric sensor includes three sets of photodetectors and filter units corresponding to the red, green, and blue spectral bands, respectively, for simultaneously acquiring three-channel spectral signals.

[0015] Optionally, the light source module is a light-emitting diode (LED) with a white light emission spectrum.

[0016] Optionally, the marking position is located near the location where the cable tie is heat-fused.

[0017] By adopting the above technical solution and setting the marking position near the heat-sealing point of the cable tie, direct detection of the final completed state of the bundling is achieved. This position is the final stage of the bundling process, and detection here can most accurately and directly reflect the bundling quality.

[0018] Optionally, both the light source module and the spectral analysis module are installed on the positioning device of the strapping machine. The emitted light from the light source module is horizontally positioned and inclined to the plane of the marked position, which is the position where the strapping is attached to the machine head when it is heat-melted by the machine head.

[0019] By adopting the above technical solution, the marking position is closer to the hot-melt position of the cable tie, and may even coincide with the hot-melt position, further improving the accuracy of detection.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. When the cable ties are not properly secured, they will sink and come out of the locking position. By analyzing the spectral characteristics of the reflected light, the quality of the cable ties can be indirectly determined, achieving efficient and reliable online detection of the securing process. This system can also trigger alarms instantly, effectively preventing defective products from flowing into the next process. 2. By integrating the detection module (light source and spectral analysis module) onto the positioning device of the strapping machine and adopting a fixed optical path design with tilted illumination, the working distance and illumination angle are kept constant during each detection; and the marking position is made closer to the heat-melting position of the strapping, further improving the accuracy of the detection. Attached Figure Description

[0021] Figure 1 This is a wireframe diagram illustrating the working principle of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the structure of cable tie detachment in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the installation position of the photoelectric sensor in an embodiment of this application.

[0022] In the diagram, 1. Light source module; 2. Spectrum analysis module; 3. Processing and control module; 4. Alarm module; 5. Marker position; 6. Photoelectric sensor; 7. Positioning device; 8. Mounting plate; 9. Machine head; 10. Cable tie; 11. Locking position; 12. Item to be bundled. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0024] Specific Implementation: This embodiment discloses a strapping machine strapping quality detection device, referring to... Figure 1It includes: light source module 1, spectral analysis module 2, processing and control module 3, and alarm module 4.

[0025] The light source module 1 illuminates the marked position 5, which coincides with the locking position 11 after the cable tie 10 is used for bundling. That is, after the cable tie 10 is used for bundling, the light emitted by the light source module 1 illuminates the cable tie 10. If the cable tie 10 is not heat-fused and fixed, or if the actual pressure (tension) applied by the cable tie 10 to the battery is insufficient, the cable tie 10 will sink and disengage from the locking position 11, and the light emitted by the light source module 1 will then illuminate the bundled object 12. In this embodiment, the light source module 1 is a light-emitting diode (LED) with a white light emission spectrum.

[0026] The spectral analysis module 2 receives the reflected light signal from the marked position 5 and converts the light signal into an electrical signal representing its spectral characteristics. The cable tie 10 is pre-configured to have a first reflection characteristic for the emitted light from the light source module 1. The marked position 5 of the bundled object 12 is configured to have a second reflection characteristic significantly different from the first reflection characteristic. The first reflection characteristic is that the dominant wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the dominant wavelength of the reflected light corresponds to the white wavelength. More specifically, the cable tie 10 reflects green light, while the bundled object emits white light. Therefore, whether the light source shines on the cable tie 10 or not will result in the reflection of light with different characteristics.

[0027] The processing control module 3, whose signal input terminal is connected to the signal output terminal of the spectral analysis module 2, is used to receive the electrical signal. The processing control module 3 is configured to: determine whether the cable tie 10 is located at the marked position 5 based on the spectral characteristics of the reflected light signal, and send a trigger signal to the alarm module 4 connected to the signal output terminal of the processing control module 3 to drive the alarm module 4 to issue an alarm signal.

[0028] The processing control module 3 determines whether the spectrum of the reflected light signal conforms to the first reflection characteristic or the second reflection characteristic. By pre-setting that the cable tie 10 and the marker position 5 have significantly different reflection characteristics, and by basing the judgment logic on recognizing these two characteristics, the judgment criteria of the detection device are very clear and stable.

[0029] The first reflection characteristic is that the dominant wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the dominant wavelength of the reflected light corresponds to the white wavelength. When the spectral analysis module 2 detects that the dominant wavelength of the reflected light is green, the processing control module 3 determines that the cable tie 10 is located at a preset position. When the dominant wavelength of the reflected light detected by the spectral analysis module 2 conforms to the second reflection characteristic or does not conform to the first emission characteristic, the processing control module 3 determines that the cable tie 10 is not located at the marked position 5.

[0030] To reduce costs, the spectral analysis module 2 is a filter-based photoelectric sensor 6, which includes at least one photodetector and an optical filter disposed in the optical path of the photodetector. The filter-based photoelectric sensor 6 includes three sets of photodetectors and filter units corresponding to the red, green, and blue spectral bands, respectively, for simultaneously acquiring three-channel spectral signals.

[0031] To improve the accuracy of the detection device, the marking position 5 should be close to the heat-sealing position of the cable tie 10. In this embodiment, the marking position 5 is the position where the cable tie 10 is attached to the machine head 9 when it is heat-sealed. Specifically, the light source module 1 is also integrated into the photoelectric sensor 6, which is installed on the positioning device 7 of the strapping machine. The positioning device 7 is used to clamp and position the object to be strapped. The positioning device 7 is fixedly connected to the mounting plate 8 of the strapping machine, and the machine head 9 is slidably connected to the mounting plate 8. Under the action of the drive structure, the mounting plate 8 can move closer to the object to be strapped, so that the positioning device 7 can fix the object to be strapped. Under the action of another drive device, the machine head 9 is attached to the object to be strapped and the cable tie 10 is heat-sealed and fixed.

[0032] The light emitted by the light source module 1 is horizontally positioned and tilted at an angle to the plane of the marking position 5. When the mounting plate 8 approaches the object to be bundled under the action of the drive structure, it secures the object. After the heat-sealing process is complete, the machine head 9 is lifted backward, while the positioning device 7 remains stationary. The light emitted by the light source module 1 illuminates the position where the cable tie 10 was attached to the machine head 9 during the heat-sealing process. The marking position 5 moves further closer to the heat-sealed position of the cable tie 10, and may even coincide with it, further improving the accuracy of the detection.

[0033] The implementation principle of this application embodiment is as follows: when the binding quality of the cable tie 10 is unqualified, the cable tie 10 will sink and thus disengage from the locking position 11. By analyzing the spectral characteristics of the reflected light, the binding quality of the cable tie 10 is indirectly judged, realizing efficient and reliable online detection of the binding process, and can trigger an alarm in time, effectively preventing unqualified products from flowing into the next process. The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bale-tying quality detection device for a baling machine, characterized by include: The light source module (1) is used to illuminate the marked position (5), and the locking position of the cable tie (10) coincides with the marked position (5); The spectral analysis module (2) is used to receive the reflected light signal from the marked position (5) and convert the light signal into an electrical signal representing its spectral characteristics. The processing control module (3) has its signal input terminal connected to the signal output terminal of the spectral analysis module (2) for receiving the electrical signal; The alarm module (4) is connected to the signal output terminal of the processing control module (3); The processing control module (3) is configured to: determine whether the cable tie (10) is located at the marked position (5) based on the spectral characteristics of the reflected light signal, send a trigger signal to the alarm module (4), and drive the alarm module (4) to send an alarm signal.

2. The strapping quality detection device for a strapping machine according to claim 1, characterized in that, The cable tie (10) is pre-set to have a first reflection characteristic for the emitted light of the light source module (1); the marking position (5) is set to have a second reflection characteristic different from the first reflection characteristic; the processing control module (3) makes a judgment by identifying whether the reflected light spectrum conforms to the first reflection characteristic or the second reflection characteristic.

3. The strapping quality detection device for a strapping machine according to claim 2, characterized in that, The first reflection characteristic is that the main wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the main wavelength of the reflected light corresponds to the white or the original wavelength of the light source module (1). When the spectral analysis module (2) detects that the main wavelength of the reflected light is green, the processing control module (3) determines that the cable tie (10) is located in a preset position.

4. The strapping quality detection device for a strapping machine according to claim 2, characterized in that, The first reflection characteristic is that the main wavelength of the reflected light corresponds to the green band, and the second reflection characteristic is that the main wavelength of the reflected light corresponds to the white or the original wavelength of the light source module (1). When the main wavelength of the reflected light detected by the spectral analysis module (2) matches the second reflection characteristic, the processing control module (3) determines that the cable tie (10) is not located at the marked position (5).

5. The strapping quality detection device for a strapping machine according to claim 1, characterized in that, The spectral analysis module (2) is a filter-based photoelectric sensor (6), which includes at least one photodetector and an optical filter disposed on the optical path of the photodetector.

6. The strapping quality detection device for a strapping machine according to claim 5, characterized in that, The filter-based photoelectric sensor (6) includes three sets of photodetectors and filter units corresponding to the red, green and blue spectral bands, respectively, for simultaneously acquiring three-channel spectral signals.

7. The strapping quality detection device for a strapping machine according to claim 1, characterized in that, The light source module (1) is a light-emitting diode, and its emission spectrum is white light.

8. The strapping quality detection device for a strapping machine according to claim 1, characterized in that, The marked position (5) is close to the heat-fused position of the cable tie (10).

9. The strapping quality detection device for a strapping machine according to claim 8, characterized in that, The light source module (1) and the spectral analysis module (2) are both installed on the positioning device (7) of the strapping machine. The light emitted by the light source module (1) is set horizontally and is inclined to the plane of the marking position (5). The marking position (5) is the position where the strapping (10) is attached to the machine head (9) when it is heat-melted by the machine head (9).

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