Transparent object correction sensor

Abstract

The invention belongs to the technical field of sensors, and discloses a transparent object deviation correction sensor which comprises a transmitting module, a receiving module and a controller. The transmitting module is used for transmitting laser, receiving an adjusting signal of the controller and adjusting the intensity of the transmitted laser according to the adjusting signal; the receiving module is used for receiving the laser which is transmitted by the transmitting module and penetrates through a measured transparent object, and outputting a position signal and an illumination intensity signal of the laser; the controller is used for receiving the illumination intensity signal, judging whether the illumination intensity signal is saturated or not, and outputting the adjusting signal to the transmitting module according to the saturation condition of the illumination intensity signal. The problem that an existing object correction sensor cannot accurately detect a transparent object is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sensors, and particularly relates to a transparent object deviation correction sensor. BACKGROUND

[0002] In the industrial production and automatic control process, the position of the material needs to be detected and corrected in real time. The photoelectric deviation correction sensor detects the edge or position change of the target object and transmits the corresponding signal to the upper control system, so as to realize the accurate adjustment of the position of the material. The existing photoelectric deviation correction sensor generally adopts the cooperation of the emitted light beam and the receiving device to detect the shielding condition of the light by the non-transparent material, so as to determine the position of the target object.

[0003] However, the existing photoelectric deviation correction sensor is generally applicable to non-transparent or semi-transparent objects, and its detection principle mainly depends on the complete shielding effect of the non-transparent object on the light. When the object enters the detection area, some pixel signals on the receiving end CMOS will rapidly change from the saturation state to 0V, so as to identify the edge position of the target. However, for transparent materials (such as transparent film, glass, PET film, etc.), due to the high transmittance of the light, the light cannot be significantly shielded, so that the traditional sensor cannot identify the edge or position information of the transparent material, which limits its application in the processing process of the transparent material.

[0004] In addition, the traditional photoelectric deviation correction sensor also has the following disadvantages: the parallel light intensity of the emitting end is a fixed value, which cannot be flexibly adjusted according to the characteristics of the on-site environment or the detected object, resulting in insufficient signal contrast or excessive interference; and the emitting module and the controller do not have a communication mechanism, so that the actual receiving signal state of the receiving end cannot be dynamically adjusted, which affects the detection accuracy and stability. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a transparent object deviation correction sensor, which solves the problem that the existing object deviation correction sensor cannot accurately detect the transparent object.

[0006] The technical solution of the present application is that the present application provides a transparent object deviation correction sensor, which comprises an emitting module, a receiving module and a controller. The emitting module is used for emitting laser and receiving an adjustment signal of the controller, and adjusting the intensity of the emitted laser according to the adjustment signal. The receiving module is used for receiving the laser emitted by the emitting module and passing through the transparent object to be detected, and outputting the position signal and the illumination intensity signal of the laser. The controller is used for receiving the illumination intensity signal, judging whether the illumination intensity signal reaches saturation, and outputting the adjustment signal to the emitting module according to the saturation condition of the illumination intensity signal.

[0007] Further, the emitting module comprises a laser driving circuit, a parallel light assembly, a first single-chip microcomputer and a first communication assembly, The first communication assembly is configured to receive the adjustment signal sent by the controller module and deliver the adjustment signal to the first single-chip microcomputer. The first single-chip microcomputer outputs a light-emitting intensity signal to the laser driving circuit according to the adjustment signal. The laser driving circuit emits laser light of corresponding intensity according to the light-emitting intensity signal, and the laser light passes through the parallel light assembly to convert the laser light into parallel laser light and irradiate towards the side of the receiving assembly.

[0008] Further, the receiving module comprises a CMOS receiving assembly, a second single-chip microcomputer and a second communication assembly, The CMOS receiving assembly receives the laser light and outputs the light intensity signal and the position information signal of the laser light to the second single-chip microcomputer. The second single-chip microcomputer processes the light intensity signal and the position signal of the laser light and outputs them to the controller through the second communication assembly.

[0009] Further, the CMOS receiving assembly is symmetrical to the parallel light assembly with respect to the transparent object to be measured.

[0010] Further, the controller comprises a third single-chip microcomputer and a third communication assembly, The third single-chip microcomputer receives the light intensity signal and the position signal of the laser light sent by the second communication assembly, judges whether the light intensity signal is a saturated signal, and outputs the adjustment signal to the first communication assembly. The third single-chip microcomputer outputs the light intensity signal and the position signal of the laser light to an external deviation correction system through the third communication assembly.

[0011] Further, the controller further comprises a display screen, and the third single-chip microcomputer converts the light intensity signal of the laser light into a position signal and outputs it to the display screen.

[0012] Further, the judging whether the light intensity signal is a saturated signal and outputting the adjustment signal to the first communication assembly comprises: The third single-chip microcomputer receives the light intensity signal and judges whether the light intensity signal is a saturated signal. If the light intensity signal is a saturated signal, the adjustment signal is a light intensity signal reduction signal. If the light intensity signal is an unsaturated signal, the adjustment signal is a light intensity signal maintenance signal.

[0013] Further, the measured transparent object passes between the parallel light assembly and the CMOS assembly, if the obtained measurement light intensity signal is the same as the original light intensity signal, the measurement light intensity signal is a saturated signal. The measured transparent object passes between the parallel light assembly and the CMOS assembly, if the measurement light intensity signal is different from the original light intensity signal, the measurement light intensity signal is an unsaturated signal. Wherein, the original light intensity signal is the light intensity signal obtained between the parallel light assembly and the CMOS assembly without the measured object.

[0014] Further, the third communication assembly is respectively provided with a first controller connector and a second controller connector, the first controller connector is connected with the transmitter connector on the first communication assembly, and the first communication assembly is outputted with the adjustment signal and provided with power supply. The second controller connector is connected with the receiver connector on the second communication assembly, and the light intensity signal of the laser and the position signal are received and provided with power supply.

[0015] Further, the receiving module comprises a CMOS receiving assembly, a second single-chip microcomputer and a second communication assembly, The CMOS receiving assembly receives the laser and outputs the light intensity signal and the position information signal of the laser to the second single-chip microcomputer; The second single-chip microcomputer processes the light intensity signal and the position signal of the laser and outputs to the external deviation rectification system through the second communication assembly The beneficial effects of the present application are: through the communication mechanism between the controller and the transmitting module, the laser transmitting intensity can be dynamically adjusted according to the received signal, which can adapt to the measured objects with different thickness, material and transparency, and the stability of the sensor is improved; the light intensity of the laser after penetrating the transparent object is detected by the receiving module, and the signal strength is analyzed and processed by the controller, so that the accurate monitoring and deviation rectification of the position of the transparent object are realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A structure schematic diagram of a transparent object deviation rectification sensor provided by the present application is provided. Figure 2A circuit structure schematic diagram of a laser driving circuit; Figure 3 A circuit structure schematic diagram of a CMOS receiving component; Figure 4 An ADC diagram of a saturated light intensity signal; Figure 5 An ADC diagram of an unsaturated light intensity signal; Figure 6 A structure schematic diagram of a transmitting module and a receiving module; Figure 7 A structure schematic diagram of a controller module; Figure 8 A structure schematic diagram of another transparent object deviation correction sensor provided by an embodiment of the present application.

[0018] Explanation of reference signs: 10-transmitting module, 11-first communication component, 111-transmitter connector, 12-first single-chip microcomputer, 13-laser driving circuit, 14-parallel light component; 20-receiving module, 21-CMOS receiving component, 22-second single-chip microcomputer, 23-second communication component, 231-receiver connector; 30-controller, 31-third communication component, 311-controller connector, 312-controller communication line, 32-third single-chip microcomputer, 33-display screen, 40-object to be measured. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] In the present application, the terms “first”, “second”, etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of “a plurality of” is two or more.

[0021] The implementation of the present application will be described in detail below in combination with specific drawings: A structure schematic diagram of a transparent object deviation correction sensor provided by an embodiment of the present application is shown in FIG. 1. Figure 1As shown, a transparent object deviation correction sensor comprises a transmitting module 10, a receiving module 20 and a controller 30; the transmitting module 10 is used for transmitting laser and receiving an adjusting signal of the controller 30, and the intensity of the transmitted laser is adjusted according to the adjusting signal; the receiving module 20 is used for receiving the laser transmitted by the transmitting module 10 and passing through the measured transparent object; the controller 30 is used for receiving an illumination intensity signal, judging whether the illumination intensity signal reaches saturation, and outputting an adjusting signal to the transmitting module 10 according to the saturation condition of the illumination intensity signal. The intensity of the laser emitted by the transmitting module is changed by sending the adjusting signal to the transmitting module 10 through the controller 30, and the illumination intensity of the laser after passing through the transparent object is detected by the receiving module 20, so that the weak light intensity change caused by the shielding of the transparent object is accurately recognized, and the position of the transparent object is monitored and corrected.

[0022] The transmitting module 10 comprises a first communication component 11, a first single-chip microcomputer 12, a laser driving circuit 13 and a parallel light component 14. The first communication component 11 receives the adjusting signal sent by the controller module 30 and sends the adjusting signal to the first single-chip microcomputer 12. The first single-chip microcomputer 12 adjusts the intensity of the laser emitted to the laser driving circuit 13 according to the adjusting signal. The parallel light component 14 is arranged near the laser driving circuit 13. The laser emitted by the laser driving circuit 13 passes through the parallel light component and is converted into parallel laser to irradiate the side of the receiving component 20. The laser beam has a divergence phenomenon when it is not subjected to collimation processing, so that the range of the light spot formed on the side of the receiving component 20 is uncertain. The laser is subjected to collimation processing by the parallel light component 14, so that the light rays keep consistent in direction and form a uniform and stable parallel light beam. When the parallel light passes through the measured object, the path of the parallel light does not have a significant deviation, and it is easier to accurately quantify the shielding, refraction or diffraction change caused by the measured object, so as to improve the pixel positioning accuracy of the receiving module 20 in two dimensions.

[0023] In an embodiment of the present application, the laser driving circuit 13 is as shown in the figure. Figure 2 The first single-chip microcomputer provides an LD-PWM pulse signal, an illumination intensity signal and a switching signal for the laser driving circuit. The illumination intensity signal LD-ADC is amplified by an amplifier U1A and delivered to a light-emitting diode D3 to control and adjust the intensity of the laser. The switching signal LD-SWITCH controls the on-off of the light-emitting diode D3. When LD-SWITCH is at a high level, D3 is powered on to emit light. When LD-SWITCH is at a low level, D3 is powered off to extinguish. D3 is turned on only when the laser or light needs to be emitted, so as to avoid power consumption and heat caused by long-term continuous light emission. The laser driving circuit is not limited to the circuit structure provided in the embodiment, and other light-emitting circuits can also be used.

[0024] As shown in the figure, Figure 1As shown, the receiving module 20 includes a CMOS receiving component 21, a second single-chip microcomputer 22 and a second communication component 23; the CMOS receiving component 21 receives the illumination intensity signal and the position information signal obtained by the laser passing through the transparent object to be measured, and transmits the illumination intensity signal and the position information signal to the controller 30 through the second communication component 23, wherein the CMOS receiving component 21 and the collimator component 14 are symmetrically arranged. The illumination intensity signal reflects the energy attenuation of the laser after being absorbed or refracted by the transparent object, and can be used to determine whether there is an obstruction or a change in light transmittance; the position information signal is reflected by the change of the pixel coordinates of the light spot on the CMOS sensor, and reflects the edge and offset position of the transparent object.

[0025] As shown in the figure, Figure 3 The CMOS receiving component includes a CMOS chip U2, a level conversion chip U3 and a voltage follower U4, the level conversion chip U3 is connected with the second single-chip microcomputer 22, receives the start signal MCU-ST and the clock signal MCU-CLK transmitted by the second single-chip microcomputer, converts them into the start signal CMOS-ST and the clock signal CMOS-CLK acceptable by the CMOS chip U2, and transmits them to the CMOS chip U2; the CMOS chip U2 receives the pixel and position information, and transmits the illumination intensity signal and the position signal to the second single-chip microcomputer 22 MCU-video interface through the voltage follower U4.

[0026] As shown in the figure, Figure 1 The controller 30 includes a third communication component 31, a third single-chip microcomputer 32 and a display screen 33, the third communication component 31 is used to receive the illumination intensity signal and the position signal transmitted by the second communication component 23 and transmit them to the third single-chip microcomputer 32, the third single-chip microcomputer 32 analyzes whether the illumination intensity signal is a saturated signal, and outputs an adjustment signal to the first communication component 11; the third single-chip microcomputer 32 transmits the illumination intensity signal and the position signal to the external deviation correction system through the third communication component 31, the deviation correction system judges whether the material deviates from the preset path after receiving the signal, and drives the actuator to make deviation correction, so as to realize accurate control of the transparent object. The third single-chip microcomputer 32 converts the illumination intensity signal into a position signal and outputs it to the display screen 33, so as to provide intuitive and visual data feedback for the on-site operator, and facilitate quick adjustment of system parameters or judgment of whether the operation is normal.

[0027] When the third single-chip microcomputer 32 receives the illumination intensity signal, it judges whether the illumination intensity signal is a saturated signal, if the illumination intensity signal is a saturated signal, it outputs an adjustment signal to reduce the illumination intensity; if the illumination intensity signal is an unsaturated signal, it outputs an adjustment signal to maintain the illumination intensity; if the illumination intensity signal is too low to be detected, it outputs an adjustment signal to enhance the illumination intensity.

[0028] As shown in the figure, Figure 4The saturation light intensity signal is shown, when the measured transparent object passes between the parallel light component 14 and the CMOS component 21, the light intensity signal does not change, so the transparent object cannot be detected. In an embodiment, the ADC of the second single-chip microcomputer 22 is 12 bits, and when the signal is saturated, the ADC value corresponding to 3.3V is 65536. At the same time, due to the diffraction phenomenon of light, the waveform formed at the edges of the CMOS is composed of a rising edge and a falling edge.

[0029] As shown in Figure 5 , the light intensity signal is adjusted to an unsaturated signal, when the measured transparent object passes between the parallel light component 14 and the CMOS component 21, the parallel light still has part of the light accepted by the CMOS after passing through the transparent object, this part of the signal will be reduced, but not to 0V. Although the transparent object has high light transmittance, it still has a certain degree of absorption, scattering, reflection or refraction effect on the laser, so when the laser beam penetrates the transparent object, the light intensity will be weakened compared to the state without object shielding. In an embodiment, when there is no transparent object, the unsaturated state value detected is 5000, when the transparent object enters, the ADC value decreases from the unsaturated state 5000 to 4000, then A-B is the distance of the transparent object entering the parallel light.

[0030] Figure 6 The structure diagram of the transmitting module and the receiving module is shown in Figure 6 , the transmitting module 10 and the receiving module 20 are symmetrical, the parallel light beam emitted by the transmitting module 10 is perpendicular to the receiving module 20, the measured transparent object 40 passes between the transmitting module 10 and the receiving module 20, the first communication component 11 is provided with a transmitter connector 111, the second communication component 23 is provided with a receiver connector 231, and the transmitter connector 11 and the receiver connector 231 each include positive and negative power lines and two signal lines.

[0031] Figure 7 The structure diagram of the controller module is shown in Figure 7 , the third communication component 31 is provided with two groups of controller connectors 311, the two groups of controller connectors 311 are respectively connected with the transmitter connector 111 and the receiver connector 231, for power supply and communication of the transmitting module 10 and the receiving module 20, the display screen 33 is arranged on the shell of the receiving module 30, providing intuitive and visual data feedback for the on-site operator, facilitating quick adjustment of system parameters or judgment of whether the operation is normal; the third communication component 31 further includes a controller communication line 312, the controller communication line 312 includes positive and negative power lines, switch signal output lines, analog output lines and shielding lines, for communication with an external deviation correction system to timely correct the position of the transparent object and power supply for the control module 30.

[0032] In the embodiment, the first communication component 11, the second communication component 23 and the third communication component 31 are all 485 communication modules, hardware modules for data transmission based on RS-485 communication protocol, realizing long-distance, strong anti-interference and stable and reliable data transmission among multiple devices.

[0033] In another embodiment, as shown in FIG. 3, the transmitting module 10 is the same as that in the first embodiment, which will not be described here again. Figure 8 The second communication component 23 is connected with the display screen 33, and the light intensity signal and the position signal are transmitted to the display screen 33. The second communication component 23 is connected with the external deviation rectification system, and the light intensity signal and the position signal are directly outputted.

[0034] Obviously, the above only describes the preferred embodiments of the present application and the applied technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

[0035] Note that in the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. The illustrative expressions of the above terms in the present specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

Claims

1. A transparent object deviation sensor, characterized in that The application relates to a transparent object measuring system, which comprises a transmitting module, a receiving module and a controller. The transmitting module is used for transmitting laser and receiving the adjusting signal of the controller, and the intensity of the transmitted laser is adjusted according to the adjusting signal. The receiving module is used for receiving the laser transmitted by the transmitting module and passing through the measured transparent object, and the position signal and the illumination intensity signal of the laser are outputted. The controller is used for receiving the illumination intensity signal, judging whether the illumination intensity signal reaches saturation, and outputting the adjusting signal to the transmitting module according to the saturation condition of the illumination intensity signal. The transmitting module comprises a laser driving circuit, a parallel light assembly, a first single-chip microcomputer and a first communication assembly.

2. A transparent object misregistration sensor as in claim 1, wherein, The first communication assembly is used for receiving the adjusting signal sent by the controller module and transmitting the adjusting signal to the first single-chip microcomputer. The first single-chip microcomputer outputs the light-emitting intensity signal to the laser driving circuit according to the adjusting signal. The laser driving circuit transmits laser with corresponding intensity according to the light-emitting intensity signal, and the laser is converted into parallel laser by the parallel light assembly and irradiated towards the side of the receiving assembly. The receiving module comprises a CMOS receiving assembly, a second single-chip microcomputer and a second communication assembly.

3. A transparent object misregistration sensor as in claim 2 wherein, The CMOS receiving assembly receives the laser and outputs the illumination intensity signal and the position information signal of the laser to the second single-chip microcomputer. The second single-chip microcomputer processes the illumination intensity signal and the position signal of the laser and outputs them to the controller through the second communication assembly. The CMOS receiving assembly is symmetrical to the parallel light assembly with respect to the measured transparent object.

4. A transparent object misregistration sensor as in claim 3 wherein, The controller comprises a third single-chip microcomputer and a third communication assembly.

5. A transparent object misregistration sensor as in claim 3 wherein, The third single-chip microcomputer receives the illumination intensity signal and the position signal of the laser sent by the second communication assembly, judges whether the illumination intensity signal is a saturated signal, and outputs the adjusting signal to the first communication assembly. The third single-chip microcomputer outputs the illumination intensity signal and the position signal of the laser to an external deviation rectifying system through the third communication assembly. The controller further comprises a display screen, and the third single-chip microcomputer converts the illumination intensity signal of the laser into a position signal and outputs the position signal to the display screen.

6. A transparent object misregistration sensor as in claim 5, wherein, The judging whether the illumination intensity signal is a saturated signal and outputting the adjusting signal to the first communication assembly comprises that:

7. A transparent object misregistration sensor as in claim 5 wherein, The third single-chip microcomputer receives the illumination intensity signal, judges whether the illumination intensity signal is a saturated signal, if the illumination intensity signal is a saturated signal, the adjusting signal is a light intensity reducing signal, and if the illumination intensity signal is an unsaturated signal, the adjusting signal is a light intensity maintaining signal. The measured transparent object passes between the parallel light assembly and the CMOS assembly, if the measured illumination intensity signal is unchanged compared with the original illumination intensity signal, the measured illumination intensity signal is a saturated signal.

8. A transparent object misregistration sensor as in claim 7, wherein, The measured transparent object passes between the parallel light assembly and the CMOS assembly, if the measured illumination intensity signal is different from the original illumination intensity signal, the measured illumination intensity signal is an unsaturated signal. ​ The original light intensity signal is obtained without the measured object between the parallel light assembly and the CMOS assembly.

9. A transparent object misregistration sensor as in claim 5, wherein, The third communication assembly is respectively provided with a first controller connector and a second controller connector. The first controller connector is connected with the transmitter connector on the first communication assembly to output the adjustment signal and provide power supply to the first communication assembly.

10. A transparent object misregistration sensor as in claim 3, wherein, The second controller connector is connected with the receiver connector on the second communication assembly to receive the light intensity signal and the position signal of the laser and provide power supply. The receiving module comprises a CMOS receiving assembly, a second single-chip microcomputer and a second communication assembly. The CMOS receiving assembly receives the laser and outputs the light intensity signal and the position information signal of the laser to the second single-chip microcomputer. The second single-chip microcomputer processes the light intensity signal and the position signal of the laser and outputs to an external deviation rectification system through the second communication assembly.

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