Light detection system and control method thereof

Abstract

The invention discloses a light detection system and a control method of the light detection system, and relates to the technical field of photoelectric control. The system comprises a detection controller, a first shell, a second shell, a first signal transceiver, a second signal transceiver, a light emitting device and a lens group in the first shell, the light-emitting device is used for emitting point laser and irradiating the point laser to the light inlet surface of the lens group through the optical fiber, and the lens group comprises at least one lens; the lens group is used for expanding the point laser received by the light inlet surface into line laser, and irradiating the line laser to a detection area of the light detection system from an irradiation surface of the lens group; the detection controller is used for determining whether the first shell and the second shell are displaced or not by means of the first shell, the second shell, the first signal transceiver and the second signal transceiver. According to the technical scheme, the irradiation quality and the irradiation safety of the line laser emitted by the optical detection system can be improved.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic control technology, and in particular to a light detection system and a control method for the light detection system. Background Technology

[0002] Optical detection systems are commonly used to illuminate securities by emitting line lasers from internal light-emitting devices, and to acquire images of the illuminated securities using image acquisition devices within the optical detection system, thereby performing anti-counterfeiting analysis on the securities based on the images.

[0003] Currently, the light-emitting devices in optical detection systems consist of multiple fiber-coupled high-intensity point light sources. These point lasers are directly combined into a line laser to illuminate securities. However, when combining the point lasers from multiple source sources into a line laser, it is difficult for their focal lengths to be aligned in a straight line. This results in poor linearity of the line laser illuminating the securities, leading to poor illumination quality and failing to meet the requirements for anti-counterfeiting analysis of securities. Summary of the Invention

[0004] In view of this, this application provides a light detection system and a control method for the light detection system, the main purpose of which is to solve the technical problem of poor irradiation quality of the line laser irradiating securities in existing light detection systems.

[0005] According to a first aspect of the present invention, a light detection system is provided, the light detection system comprising a detection controller, a first housing, a second housing, a first signal transceiver, a second signal transceiver, a light-emitting device, and a lens group, wherein the first signal transceiver comprises a first signal source and a first signal receiver, the second signal transceiver comprises a second signal source and a second signal receiver, the lens group is disposed within the first housing, the first housing has a first protrusion, and the second housing has a second protrusion; The light-emitting device is disposed outside the first housing and is used to emit a point laser and irradiate the light-incoming surface of the lens group through an optical fiber, wherein the lens group includes at least one lens; The lens group is used to expand the point laser received by the light-incoming surface into a line laser, and to irradiate the line laser onto the detection area of ​​the optical detection system by the irradiation surface of the lens group, wherein the detection area is disposed between the first housing and the second housing; The first housing has an optical fiber inlet and a laser emission outlet. The laser emission outlet is located at the top of the first protrusion. The optical fiber extends from the optical fiber inlet into the first housing so that the point laser emitted by the light-emitting device can pass through the optical fiber to illuminate the light-inlet surface of the lens group, and the line laser emitted by the lens group can pass through the laser emission outlet to illuminate the detection area outside the first housing. The first signal source and the first signal receiver are disposed apart from the first protrusion. The first signal receiver is used to receive a first detection signal sent by the first signal source. The second signal source and the second signal receiver are disposed apart from the second protrusion. The second signal receiver is used to receive a second detection signal sent by the second signal source. The detection controller is configured to perform the following processes: The detection controller acquires the first detection signal from the first signal receiver in real time, and acquires the second detection signal from the second signal receiver in real time; Determine the first signal parameters of the first detection signal and the second signal parameters of the second detection signal; The first signal parameter is compared with a preset first standard signal parameter, and the second signal parameter is compared with a preset second standard signal parameter. If the first signal parameter is not the same as the first standard signal parameter, or the second signal parameter is not the same as the second standard signal parameter, the light-emitting device is controlled to stop emitting point laser and a position deviation alarm message is sent to the host computer.

[0006] Optionally, the detection controller is further configured to collect the input current and input voltage of the light-emitting device, calculate the output power of the light-emitting device based on the input current and input voltage, compare the output power with a preset power range, determine whether the output power is within the power range, and if the output power is not within the power range, send a power alarm message to the remote host computer.

[0007] Optionally, the light detection system further includes a heat dissipation unit, which includes a heat sink, heat dissipation fins, and a heat pipe; a first side of the heat sink contacts the light-emitting device, and a first end of the heat pipe is disposed on a second side of the heat sink; the heat dissipation fins are disposed at the heat pipe and contact the heat pipe.

[0008] Optionally, the heat dissipation unit further includes a semiconductor cooler and a first temperature sensor; the semiconductor cooler is disposed between the first side of the heat sink and the light-emitting device, and the first temperature sensor is disposed on the first side of the heat sink for collecting the heat sink temperature value; the detection controller is further configured to perform the following processing: the detection controller acquires the heat sink temperature value in real time, and determines the heat sink temperature range in which the heat sink temperature value is located among a plurality of preset heat sink temperature ranges, wherein each heat sink temperature range corresponds to a power value; determines the power value corresponding to the heat sink temperature range in which the heat sink temperature value is located, and controls the semiconductor cooler to perform cooling operation with the cooling power of the power value.

[0009] Optionally, the optical detection system further includes a second temperature sensor; the second temperature sensor is disposed on the second side of the heat sink, and is used to collect the cold end temperature value of the heat sink in real time and send the cold end temperature value to the detection controller; the detection controller is also used to compare the cold end temperature value with a preset temperature range to determine whether the cold end temperature value is within the temperature range, and if the cold end temperature value is not within the temperature range, send a temperature alarm message to the host computer.

[0010] Optionally, the heat dissipation unit further includes a plurality of cooling fans; the plurality of cooling fans are connected in series, and the projections of the plurality of cooling fans toward the heat dissipation fins cover the heat dissipation fins, so that the airflow generated by each cooling fan during operation flows through the heat dissipation fins.

[0011] Optionally, the detection controller is further configured to perform the following processing: the detection controller acquires the cold end temperature value in real time, and determines the preset temperature range in which the cold end temperature value is located among a plurality of preset temperature ranges, wherein each preset temperature range corresponds to a rotation value; determines the rotation value corresponding to the preset temperature range in which the cold end temperature value is located, and controls the fan blades of the cooling fan to rotate at the rotation speed of the rotation value.

[0012] Optionally, the first protrusion and the second protrusion are truncated cones.

[0013] Optionally, the first diameter of the top end of the first protrusion is different from the second diameter of the bottom end, and the third diameter of the top end of the second protrusion is different from the fourth diameter of the bottom end.

[0014] According to a second aspect of the present invention, a control method for an optical detection system is provided, the method being applied to a detection controller of the optical detection system as described above; the method comprising: The temperature value of the light-emitting device of the optical detection system is collected in real time and sent to the host computer at the remote end; The input current and input voltage of the light-emitting device are collected, and the output power of the light-emitting device is calculated based on the input current and the input voltage; The output power is compared with a preset power range to determine whether the output power is within the power range; If the output power is not within the specified power range, a power alarm message is sent to the host computer.

[0015] The present invention provides an optical detection system and a control method for the optical detection system, which can expand the point laser emitted by a single light-emitting device through a lens group, so that the laser irradiated by the lens group is a line laser. This ensures the linearity of the line laser irradiating the securities set in the detection area. Compared with the existing technical solution of combining point lasers emitted by multiple point light sources into a line laser, this invention can significantly improve the irradiation quality of the line laser emitted by the optical detection system, so as to meet the irradiation requirements of securities when performing anti-counterfeiting analysis.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This figure shows one of the structural schematic diagrams of an optical detection system provided by an embodiment of the present invention; Figure 2 This is a second schematic diagram of the structure of an optical detection system provided in an embodiment of the present invention; Figure 3 This figure shows one of the structural schematic diagrams of a heat dissipation unit provided in an embodiment of the present invention; Figure 4 This is a second schematic diagram of a heat dissipation unit provided in an embodiment of the present invention; Figure 5 This diagram illustrates the content displayed in a human-computer interaction interface provided by an embodiment of the present invention; Figure 6 The diagram shows a flow chart of a control method for an optical detection system provided by an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0019] Currently, the light-emitting devices in optical detection systems consist of multiple fiber-coupled high-intensity point light sources. These point lasers are directly combined into a line laser to illuminate securities. However, when combining the point lasers from multiple source sources into a line laser, it is difficult for their focal lengths to be aligned in a straight line. This results in poor linearity of the line laser illuminating the securities, leading to poor illumination quality and failing to meet the requirements for anti-counterfeiting analysis of securities.

[0020] To address the above problems, in one embodiment, such as Figure 1 As shown, an optical detection system is provided. Taking the system for anti-counterfeiting analysis of securities as an example, the optical detection system includes a light-emitting device 100, a lens group 300, a first signal transceiver, a second signal transceiver, a detection controller (not shown in the figure), a first housing 900, and a second housing 1000. The light-emitting device 100 can be an optical fiber coupled high-intensity light source device, and the detection controller can be a computer device such as a microcontroller or a digital signal processor.

[0021] The light-emitting device 100 emits a point laser 200, which is then transmitted through an optical fiber to the light-receiving surface of the lens group 300. The lens group 300 includes at least one lens, which may be a convex lens. Specifically, the light source of the light-emitting device 100 is connected to one end of the optical fiber, and the other end of the optical fiber extends to the light-receiving surface of the lens group 300. This allows the point laser 200 emitted by the light source of the light-emitting device 100 to enter the optical fiber from one end, propagate within the fiber, and then exit at the other end, illuminating the light-receiving surface of the lens group 300.

[0022] Furthermore, the lens group 300 is used to expand the point laser 200 received by the light-receiving surface into a line laser 400, and to project the line laser 400 from the irradiation surface of the lens group 300 onto the detection area 500 of the optical detection system. Here, the detection area 500 can be a location in the optical detection system for placing the security S, so that the line laser 400 can irradiate the security S to be subjected to anti-counterfeiting analysis.

[0023] Specifically, the lens group 300 is disposed within the cavity enclosed by the first housing 900, and the detection area 500 is disposed between the first housing 900 and the second housing 1000. Here, the first housing 900 and the second housing 1000 can serve as laser shields to prevent laser transmission between them. Furthermore, the security S can pass through the detection area 500 between the first housing 900 and the second housing 1000. Furthermore, the light-emitting device 100 is disposed outside the first housing 900.

[0024] Specifically, the first housing 900 has an optical fiber inlet 910 and a laser outlet 920. The optical fiber extends from the optical fiber inlet 910 into the first housing 900 so that the point laser 200 emitted by the light-emitting device 100 can pass through the optical fiber to illuminate the light-receiving surface of the lens group 300, and the line laser 400 emitted by the lens group 300 can pass through the laser outlet 920 to illuminate the detection area 500 outside the first housing 900. Further, the second housing 1000 is used to block the line laser 400 passing through the detection area 500. Here, the length of the laser outlet 920 is the same as or slightly greater than the length of the line laser 400, and the width of the laser outlet 920 is the same as or slightly greater than the width of the line laser 400.

[0025] The first signal transceiver includes a first signal source T1 and a first signal receiver R1, the second signal transceiver includes a second signal source T2 and a second signal receiver R2, the lens group 300 is disposed inside the first housing 900, the first housing 900 has a first protrusion 930, and the second housing 1000 has a second protrusion 1010.

[0026] Furthermore, the first housing 900 has a first protrusion 930, and the laser emission port 920 is disposed at the top of the first protrusion 930. The second housing 1000 has a second protrusion 1010, which can extend out of the outer surface of the second housing 1000.

[0027] Furthermore, the first signal source T1, the first signal receiver R1, the second signal source T2, and the second signal receiver R2 are respectively connected to a detection controller (not shown in the figure). The detection controller can control the first signal source T1 and the second signal source T2 to emit detection signals with specific wavelengths, frequencies, and amplitudes. Furthermore, the first signal receiver R1 can receive the detection signal emitted from the first signal source T1 and send it to the detection controller; the second signal receiver R2 can receive the detection signal emitted from the second signal source T2 and send it to the detection controller.

[0028] Specifically, the first signal source T1 and the first signal receiver R1 can constitute a position sensor. The first signal source T1 and the first signal receiver R1 are positioned at a distance from the first protrusion 920. The first signal receiver R1 is used to receive the first detection signal sent by the first signal source T1, so that the first protrusion 920 is on the shortest transmission path of the first detection signal sent from the first signal source T1 to the first signal receiver R1.

[0029] Furthermore, the second signal source T2 and the second signal receiver R2 can constitute a position sensor. The second signal source T2 and the second signal receiver R2 are disposed at a distance from the second protrusion 1010. The second signal receiver R2 is used to receive the second detection signal sent by the second signal source T2, so that the second protrusion 1010 is on the shortest transmission path of the second detection signal sent by the second signal source T2 to the second signal receiver R2.

[0030] Furthermore, the detection controller (not shown in the figure) is configured to perform the following processes: First, the detection controller acquires the first detection signal from the first signal receiver R1 in real time, and acquires the second detection signal from the second signal receiver R2 in real time; here, the first signal receiver R1 can receive the first detection signal from the first signal source T1 in real time and send the received first detection signal to the detection controller R1; furthermore, the second signal receiver R2 can receive the second detection signal from the second signal source T2 in real time and send the received second detection signal to the detection controller.

[0031] Then, the first signal parameters of the first detection signal and the second signal parameters of the second detection signal are determined. Specifically, the detection controller can analyze the first wavelength, first frequency and first amplitude of the received first detection signal as the first signal parameters. Similarly, the detection controller can analyze the second wavelength, second frequency and second amplitude of the received second detection signal as the second signal parameters.

[0032] Finally, the first signal parameter is compared with the preset first standard signal parameter, and the second signal parameter is compared with the preset second standard signal parameter. If the first signal parameter is not the same as the first standard signal parameter, or the second signal parameter is not the same as the second standard signal parameter, the light-emitting device is controlled to stop emitting point laser and a position deviation alarm message is sent to the host computer.

[0033] Here, the first standard signal parameters can be the first standard wavelength, first standard frequency, and first standard amplitude of the first test signal emitted by the first signal source T1, which has been determined in advance through experiments or tests, when it passes over the first protrusion 930 and is transmitted to the first signal receiver R1. In actual operation, when the anti-counterfeiting analysis of the security S begins, the relative positions between the first signal source T1, the first signal receiver R1, and the first protrusion 930 are the same as those in the aforementioned experiments or tests, so that the first standard wavelength, first standard frequency, and first standard amplitude of the first test signal are used as the basis for determining whether the first protrusion 930 has shifted.

[0034] Similarly, the second standard signal parameters can be the second standard wavelength, second standard frequency, and second standard amplitude of the second test signal received by the second signal receiver R2 when the second test signal emitted by the second signal source T2 passes over the second protrusion 1010 and is transmitted to the second signal receiver R2, as determined in advance through experiments or tests. Here, in the actual working process, when the anti-counterfeiting analysis of the securities S begins, the relative positions between the second signal source T2, the second signal receiver R2, and the second protrusion 1010 are the same as the relative positions between the second signal source T2, the second signal receiver R2, and the second protrusion 1010 in the above-mentioned experiments or tests, so that the second standard wavelength, second standard frequency, and second standard amplitude of the second test signal are used as the basis for determining whether the second protrusion 1010 is offset. Furthermore, in the process of determining the first standard signal parameters and the second standard signal parameters, the first standard wavelength, the first standard frequency and the first standard amplitude of the first test signal received by the first signal receiver R1 can be used as the first standard signal parameters, and the second standard wavelength, the second standard frequency and the second standard amplitude of the second test signal received by the second signal receiver R2 can be used as the second standard signal parameters and stored in the detection controller.

[0035] Furthermore, in the process of comparing the first signal parameters with the first standard signal parameters, and comparing the second signal parameters with the second standard signal parameters, the first wavelength, first frequency, and first amplitude of the first detection signal are compared with the first standard wavelength, first standard frequency, and first standard amplitude, respectively, to determine whether the first wavelength, first frequency, and first amplitude are the same as the first standard wavelength, first standard frequency, and first standard amplitude, respectively. If the first wavelength is not the same as the first standard wavelength, or the first frequency is not the same as the first standard frequency, or the first amplitude is not the same as the first standard amplitude, then it is determined that the first signal parameters are not the same as the first standard signal parameters. Similarly, the second wavelength, second frequency, and second amplitude of the second detection signal are compared with the second standard wavelength, second standard frequency, and second standard amplitude, respectively, to determine whether the second wavelength, second frequency, and second amplitude are the same as the second standard wavelength, second standard frequency, and second standard amplitude, respectively. If the second wavelength is not the same as the second standard wavelength, or the second frequency is not the same as the second standard frequency, or the second amplitude is not the same as the second standard amplitude, then it is determined that the second signal parameters are not the same as the second standard signal parameters.

[0036] Here, if the first outer shell 900 shifts during the anti-counterfeiting analysis of the security S, the first signal parameter will not be the same as the first standard signal parameter. Similarly, if the second outer shell 1000 shifts during the anti-counterfeiting analysis of the security S, the second signal parameter will not be the same as the second standard signal parameter. Therefore, by determining whether the first signal parameter is the same as the first standard signal parameter and whether the second signal parameter is the same as the second standard signal parameter, it can be determined whether the first outer shell 900 and the second outer shell 1000 have shifted during the anti-counterfeiting analysis. When it is determined that the first outer shell 900 and the second outer shell 1000 have shifted, an alarm message will be issued in a timely manner to remind relevant personnel that the first outer shell 900 or the second outer shell 1000 has shifted, thus ensuring the safety of the detection. Furthermore, when the detection controller determines that the first outer shell 900 and the second outer shell 1000 have shifted, it can disconnect the power supply to the light-emitting device 100 so that the light-emitting device 100 cannot emit laser light.

[0037] Furthermore, the optical detection system also includes an image acquisition device (not shown in the figure), which can be a camera or other equipment, used to acquire image information of the security S placed in the detection area 500 and send the image information to the detection controller. The detection controller can further send the image information to a remote host computer (not shown in the figure), allowing the host computer to perform anti-counterfeiting analysis on the image information of the security S irradiated by the laser 400 and obtain the anti-counterfeiting analysis results. Here, the host computer can be a server or other computer equipment, and relevant personnel can perform anti-counterfeiting analysis on the security S based on the image information and monitor the optical detection system at the host computer to obtain the anti-counterfeiting analysis results. In addition, the detection controller can also preset relevant detection programs to perform anti-counterfeiting analysis on the security S based on the image information and obtain the anti-counterfeiting analysis results of the security S, where the anti-counterfeiting analysis results can be normal or abnormal. Furthermore, the detection controller can also be connected to the light-emitting device 100 to control the light-emitting device 100 to emit point lasers or to control the light-emitting device 100 to stop emitting point lasers.

[0038] This embodiment provides an optical detection system that expands a point laser emitted by a single light-emitting device through a lens group, transforming the laser emitted through the lens group into a line laser. This ensures the linearity of the line laser illuminating the securities located in the detection area. Compared to existing technologies that combine point lasers emitted from multiple point light sources into a line laser, this significantly improves the irradiation quality of the line laser emitted by the optical detection system, meeting the irradiation requirements for anti-counterfeiting analysis of securities. Furthermore, it can promptly issue an alarm and stop the light-emitting device from emitting laser when the first and second outer shells shift, preventing laser damage to the human body or other parts of the equipment and ensuring the safety of the optical detection system.

[0039] In an optional embodiment, such as Figure 1 As shown, the detection controller (not shown in the figure) is also used to acquire the input current and input voltage of the light-emitting device 100, and calculate the output power of the light-emitting device 100 based on the input current and input voltage. Here, the detection controller can be connected to a voltage sensor (not shown in the figure) and a current sensor (not shown in the figure) disposed at the power input port of the light-emitting device 100 to acquire the input current and input voltage supplying power to the light-emitting device 100 in real time, and multiply the input current and input voltage to obtain the output power of the light-emitting device 100. Furthermore, the detection controller can be connected to the controller of the light-emitting device 100 to control the operation and shutdown of the light-emitting device 100.

[0040] Furthermore, the detection controller compares the output power with a preset power range to determine whether the output power is within the power range; here, the power range can be the range of the output power of the light-emitting device 100 when it is working normally, and the value of the range can be determined according to the actual situation.

[0041] Furthermore, if the output power is not within the specified power range, the detection controller sends a power alarm message to a remote host computer. Here, the detection controller can be connected to a host computer to send the current output power value of the light-emitting device 100 to the host computer, and send a power alarm message to the host computer when the output power is abnormal. The embodiments provided in this application can monitor the output power of the light-emitting device and issue alarm messages in a timely manner when the output power is abnormal, thus improving the functionality of the light detection system.

[0042] In an optional embodiment, such as Figure 2 As shown, the optical detection system also includes a heat dissipation unit 800. Specifically, as... Figure 3 As shown, the heat dissipation unit includes a heat sink 810, at least one heat dissipation fin 820, and at least one heat pipe 830.

[0043] Specifically, the first side of the heat sink 810 contacts the light-emitting device 100, and the first end of the heat pipe 830 is disposed on the second side of the heat sink 810, so that heat from the surface of the light-emitting device 100 can be transferred to the heat sink 810 and the heat pipe 830. Further, the heat dissipation fins 820 are disposed at the heat pipe 830 and in contact with the heat pipe 830. The embodiment provided in this application uses a large area of ​​pure copper to construct the heat sink, and at the heat concentration point of the light-emitting device, heat is transferred to the heat dissipation fins using heat pipes, significantly improving the heat dissipation efficiency of the light-emitting device.

[0044] In an optional embodiment, such as Figure 4 As shown, the heat dissipation unit also includes a thermoelectric cooler 840 and a first temperature sensor 850, which are respectively connected to a detection controller (not shown in the figure). The thermoelectric cooler 840 is a device that generates cooling by utilizing the thermoelectric effect of semiconductors. It is also called a thermoelectric cooler. It connects two different metals with a conductor. When a direct current is applied, the temperature at one junction decreases and the temperature at the other junction increases.

[0045] Specifically, the semiconductor cooler 840 is disposed between the first side of the heat sink 810 and the light-emitting device 100, and the first temperature sensor 850 is disposed on the first side of the heat sink 810 for collecting the heat sink temperature value of the heat sink 810. Here, the first temperature sensor 850 can be disposed between the semiconductor cooler 840 and the first side of the heat sink 810 for better temperature acquisition.

[0046] Furthermore, the detection controller is also configured to perform the following processes: First, the detection controller acquires the heat sink temperature value in real time, and determines the heat sink temperature range in which the heat sink temperature value is located among a plurality of preset heat sink temperature ranges, wherein each heat sink temperature range corresponds to a power value.

[0047] Specifically, the detection controller receives the heat sink temperature value from the first temperature sensor in real time and compares the heat sink temperature value with multiple heat sink temperature ranges. Here, each heat sink temperature range corresponds to a different temperature range. For example, if there are 5 heat sink temperature ranges, namely 50 degrees to 80 degrees, 81 degrees to 110 degrees, 111 degrees to 140 degrees, 141 degrees to 170 degrees, and 171 degrees to 200 degrees, then the power value corresponding to the heat sink temperature range of 50 degrees to 80 degrees is 50 watts, the power value corresponding to the heat sink temperature range of 81 degrees to 110 degrees is 60 watts, the power value corresponding to the heat sink temperature range of 111 degrees to 140 degrees is 70 watts, the power value corresponding to the heat sink temperature range of 141 degrees to 170 degrees is 80 watts, and the power value corresponding to the heat sink temperature range of 171 degrees to 200 degrees is 90 watts. If the current heat sink temperature is 100 degrees Celsius, then the corresponding heat sink temperature range is 81 to 110 degrees Celsius, and the power consumption for this range is 60 watts. Specifically, the number of heat sink temperature ranges, the temperature span of each range, and the power consumption for each range can be determined based on actual conditions.

[0048] Furthermore, the detection controller determines the power value corresponding to the heat sink temperature range within which the heat sink temperature value falls, and controls the thermoelectric cooler 840 to perform cooling operation at the cooling power of the specified power value. Here, the detection controller can be connected to the thermoelectric cooler 840 to control its cooling power. The higher the heat sink temperature value, the higher the cooling power of the thermoelectric cooler 840, ensuring adequate heat dissipation for the light-emitting device. The embodiments provided in this application allow adjustment of the thermoelectric cooler's cooling power based on the operating temperature of the light-emitting device to ensure the stability of the device's operating temperature.

[0049] In an optional embodiment, such as Figure 4As shown, the optical detection system also includes a second temperature sensor 860.

[0050] Specifically, the second temperature sensor 860 is disposed on the second side of the heat sink 810, and is used to collect the cold end temperature value of the heat sink 810 in real time, and send the cold end temperature value to the detection controller (not shown in the figure). The second temperature sensor 860 can be a temperature sensor such as a thermistor, which can be in contact with the heat sink 810 to collect the surface temperature of the heat sink 810 as the cold end temperature value.

[0051] Furthermore, the detection controller (not shown in the figure) is also used to compare the cold end temperature value with a preset temperature range to determine whether the cold end temperature value is within the temperature range; wherein, the value of the temperature range can be determined according to the actual situation.

[0052] Furthermore, if the cold junction temperature value is not within the specified temperature range, a temperature alarm message is sent to the host computer. Here, the detection controller can send the cold junction temperature value to the host computer in real time, and send a temperature alarm message to the host computer when an abnormal temperature is detected in the light-emitting device 100. The embodiment provided in this application can monitor the temperature of the light-emitting device and issue alarm messages promptly when an abnormal temperature occurs, thus improving the functionality of the light detection system.

[0053] In an optional embodiment, such as Figure 3 As shown, the heat dissipation unit also includes multiple cooling fans F. Specifically, the multiple cooling fans F are arranged in series, and the projections of the multiple cooling fans F toward the heat dissipation fins 820 cover the heat dissipation fins 820, so that the airflow generated by each cooling fan F during operation flows through the heat dissipation fins 820. Here, each cooling fan F has the same orientation, and the airflow generated by each cooling fan F flows through the heat dissipation fins 820.

[0054] The embodiments provided in this application include a cooling fan in the optical detection system, with each cooling fan installed in series. This increases the airflow velocity inside the control box where the light-emitting device is located, increases convection capacity, and improves the heat dissipation capacity of the light-emitting device.

[0055] In an optional embodiment, the detection controller is configured to perform the following processes: First, the detection controller acquires the cold end temperature value of the heat sink in real time and determines the preset temperature range in which the cold end temperature value falls within multiple preset temperature ranges, where each preset temperature range corresponds to a rotation value. Specifically, the detection controller acquires the cold end temperature value from the second temperature sensor in real time and compares the cold end temperature value with multiple preset temperature ranges. Here, each preset temperature range corresponds to a different temperature range. For example, if there are 5 preset temperature ranges, namely 50 degrees to 80 degrees, 8... The preset temperature ranges are 1 to 110 degrees Celsius, 111 to 140 degrees Celsius, 141 to 170 degrees Celsius, and 171 to 200 degrees Celsius. Further, the preset temperature ranges are defined as follows: 50 to 80 degrees Celsius corresponds to 100 revolutions per minute (RPM); 81 to 110 degrees Celsius corresponds to 150 RPM; 111 to 140 degrees Celsius corresponds to 200 RPM; 141 to 170 degrees Celsius corresponds to 250 RPM; and 171 to 200 degrees Celsius corresponds to 300 RPM. If the current cold end temperature is 100 degrees Celsius, then the preset temperature range corresponding to 100 degrees Celsius is 81 to 110 degrees Celsius, and the RPM for this preset temperature range is 150. Specifically, the number of preset temperature ranges, the temperature span of each preset temperature range, and the RPM for each preset temperature range can be determined based on actual conditions.

[0056] Furthermore, the rotation speed corresponding to the preset temperature range where the cold end temperature value is located is determined, and the fan blades of the cooling fan are controlled to rotate at the specified rotation speed. Here, the detection controller can be connected to the cooling fan to control the fan blades to rotate at the rotation speed corresponding to the preset temperature range where the current cold end temperature value is located. The higher the cold end temperature value, the higher the rotation speed of the cooling fan, to ensure adequate heat dissipation for the light-emitting device. The embodiments provided in this application can adjust the rotation speed of the cooling fan based on the cold end temperature value of the heat sink to keep the operating temperature of the light-emitting device stable.

[0057] In an optional embodiment, the first protrusion and the second protrusion are truncated cones; the first diameter of the top end of the first protrusion is different from the second diameter of the bottom end, and the third diameter of the top end of the second protrusion is different from the fourth diameter of the bottom end.

[0058] Furthermore, the optical detection system also includes a human-machine interface (HMI), which can be located on the outer surface of the optical detection system's housing. Here, the HMI can be a serial port touchscreen. Furthermore, the HMI is connected to the detection controller to receive and display real-time operating status information from the detection controller and the light-emitting device, and to display this information. As an example, the content displayed on the HMI is as follows: Figure 5 As shown.

[0059] The optical detection system provided in this application employs a high-power single-fiber coupler strong light source and uses a special lens to expand the point laser emitted by the light source into a line laser, avoiding the linearity problems caused by using multiple light sources. Furthermore, this technical solution uses a large-area heat sink as the main heat dissipation component and a semiconductor cooler as the cooling device to actively cool the light-emitting device. The heat generated by the light-emitting device is transferred to the heat dissipation unit through heat pipes, solving the problem of excessively high operating temperature of the light-emitting device. Simultaneously, the operating temperature and power of the light-emitting device are monitored in real time, and real-time communication with a host computer is established. The operating temperature and power of the light-emitting device are sent to the host computer, and various information during the operation of the optical detection system can also be displayed through a human-machine interface. Furthermore, the proposed technical solution uses sensors to detect whether the protective shell of the light source area has shifted. When the shell shifts, the power supply to the light-emitting device is disconnected, meeting the safety requirements.

[0060] Furthermore, this embodiment provides a control method for an optical detection system, applied to the detection controller of the optical detection system as described above; further, as... Figure 6 As shown, the method includes: 601. The temperature value of the light-emitting device of the optical detection system is collected in real time and sent to the host computer at the remote end.

[0061] Here, the detection controller can be connected to a thermometer located at the light-emitting device to obtain the temperature value of the light-emitting device from the thermometer. Furthermore, the host computer can be a computer terminal, server, or other computer equipment located in the control center, allowing relevant personnel to monitor the operation of the light detection system from the host computer.

[0062] 602. Collect the input current and input voltage of the light-emitting device, and calculate the output power of the light-emitting device based on the input current and the input voltage.

[0063] Here, the detection controller can be connected to a voltage sensor and a current sensor located at the power input port of the light-emitting device to collect the input current and input voltage that power the light-emitting device in real time, and multiply the input current and input voltage to obtain the output power of the light-emitting device.

[0064] 603. Compare the output power with a preset power range to determine whether the output power is within the power range.

[0065] The power range can be defined as the range of output power of the light-emitting device during normal operation, and the value of the range can be determined according to the actual situation.

[0066] 604. If the output power is not within the specified power range, a power alarm message is sent to the host computer.

[0067] Here, relevant personnel can monitor the output power of the light-emitting device on the host computer to determine whether the light-emitting device is in normal working condition.

[0068] Furthermore, such as Figure 3 As shown, the detection controller (not shown in the figure) can adjust the speed of the cooling fan F based on the cold end temperature value of the heat sink 810. When the operating temperature value of the light-emitting device 100 is too high, the speed of the cooling fan F is increased to prevent the light-emitting device 100 from overheating.

[0069] Furthermore, such as Figure 4 As shown, the detection controller (not shown in the figure) can also adjust the cooling power of the semiconductor cooler 840 based on the operating temperature value of the light-emitting device 100. When the operating temperature value of the light-emitting device 100 is too high, the cooling power of the semiconductor cooler 840 is increased to cool down the light-emitting device 100 and ensure the stability of the operating temperature of the light-emitting device 100.

[0070] Furthermore, such as Figure 1 As shown, the detection controller (not shown in the figure) can also determine whether the first shell 900 and the second shell 1000 have shifted during the anti-counterfeiting analysis by comparing signal parameters. When it is determined that the first shell 900 and the second shell 1000 have shifted, an alarm message will be issued in time, and the light-emitting device 100 will be unable to emit laser light to ensure safety.

[0071] The control method of the optical detection system provided in this application can monitor the temperature and output power of the light-emitting device in real time when performing anti-counterfeiting analysis on securities, and issue alarm information in a timely manner when the output power is abnormal, thereby improving the functionality of the optical detection system.

[0072] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A light detection system, characterized in that, The optical detection system includes a detection controller, a first housing, a second housing, a first signal transceiver, a second signal transceiver, a light-emitting device, and a lens group. The first signal transceiver includes a first signal source and a first signal receiver, and the second signal transceiver includes a second signal source and a second signal receiver. The lens group is disposed inside the first housing. The first housing has a first protrusion, and the second housing has a second protrusion. The light-emitting device is disposed outside the first housing and is used to emit a point laser and irradiate the light-incoming surface of the lens group through an optical fiber, wherein the lens group includes at least one lens; The lens group is used to expand the point laser received by the light-incoming surface into a line laser, and to irradiate the line laser onto the detection area of ​​the optical detection system by the irradiation surface of the lens group, wherein the detection area is disposed between the first housing and the second housing; The first housing has an optical fiber inlet and a laser emission outlet. The laser emission outlet is located at the top of the first protrusion. The optical fiber extends from the optical fiber inlet into the first housing so that the point laser emitted by the light-emitting device can pass through the optical fiber to illuminate the light-inlet surface of the lens group, and the line laser emitted by the lens group can pass through the laser emission outlet to illuminate the detection area outside the first housing. The first signal source and the first signal receiver are disposed apart from the first protrusion. The first signal receiver is used to receive a first detection signal sent by the first signal source. The second signal source and the second signal receiver are disposed apart from the second protrusion. The second signal receiver is used to receive a second detection signal sent by the second signal source. The detection controller is configured to perform the following processes: The detection controller acquires the first detection signal from the first signal receiver in real time, and acquires the second detection signal from the second signal receiver in real time; Determine the first signal parameters of the first detection signal and the second signal parameters of the second detection signal; The first signal parameter is compared with a preset first standard signal parameter, and the second signal parameter is compared with a preset second standard signal parameter. If the first signal parameter is not the same as the first standard signal parameter, or the second signal parameter is not the same as the second standard signal parameter, the light-emitting device is controlled to stop emitting point laser and a position deviation alarm message is sent to the host computer.

2. The optical detection system according to claim 1, characterized in that, The detection controller is also used to collect the input current and input voltage of the light-emitting device, calculate the output power of the light-emitting device based on the input current and input voltage, compare the output power with a preset power range, and determine whether the output power is within the power range. If the output power is not within the power range, a power alarm message is sent to the remote host computer.

3. The optical detection system according to claim 2, characterized in that, The optical detection system also includes a heat dissipation unit, which includes a heat sink, heat dissipation fins, and heat pipes. The first side of the heat sink is in contact with the light-emitting device, and the first end of the heat pipe is disposed on the second side of the heat sink; The heat dissipation fins are disposed at the heat pipe and are in contact with the heat pipe.

4. The optical detection system according to claim 3, characterized in that, The heat dissipation unit also includes a semiconductor cooler and a first temperature sensor; The semiconductor cooler is disposed between the first side of the heat sink and the light-emitting device, and the first temperature sensor is disposed on the first side of the heat sink for collecting the heat sink temperature value. The detection controller is also configured to perform the following processes: The detection controller acquires the heat sink temperature value in real time and determines the heat sink temperature range in which the heat sink temperature value is located among a plurality of preset heat sink temperature ranges, wherein each heat sink temperature range corresponds to a power value. The power value corresponding to the heat sink temperature range in which the heat sink temperature value is located is determined, and the semiconductor cooler is controlled to perform cooling operation with the cooling power of the power value.

5. The optical detection system according to claim 3, characterized in that, The optical detection system also includes a second temperature sensor; The second temperature sensor is disposed on the second side of the heat sink and is used to collect the cold end temperature value of the heat sink in real time and send the cold end temperature value to the detection controller. The detection controller is also used to compare the cold end temperature value with a preset temperature range to determine whether the cold end temperature value is within the temperature range. If the cold end temperature value is not within the temperature range, a temperature alarm message is sent to the host computer.

6. The optical detection system according to claim 5, characterized in that, The heat dissipation unit also includes multiple cooling fans; The cooling fans are connected in series, and the projections of the cooling fans toward the cooling fins cover the cooling fins, so that the airflow generated by each cooling fan during operation flows through the cooling fins.

7. The optical detection system according to claim 6, characterized in that, The detection controller is also configured to perform the following processes: The detection controller acquires the cold end temperature value in real time and determines the preset temperature range in which the cold end temperature value is located among multiple preset temperature ranges, wherein each preset temperature range corresponds to a rotation value. Determine the rotation speed corresponding to the preset temperature range where the cold end temperature value is located, and control the fan blades of the cooling fan to rotate at the rotation speed of the preset temperature range.

8. The optical detection system according to claim 1, characterized in that, The first protrusion and the second protrusion are both frustum-shaped.

9. The optical detection system according to claim 8, characterized in that, The first diameter at the top of the first protrusion is different from the second diameter at the bottom, and the third diameter at the top of the second protrusion is different from the fourth diameter at the bottom.

10. A control method for an optical detection system, characterized in that, The method is applied to the detection controller of the optical detection system as described in any one of claims 1 to 9; the method includes: The temperature value of the light-emitting device of the optical detection system is collected in real time and sent to the host computer at the remote end; The input current and input voltage of the light-emitting device are collected, and the output power of the light-emitting device is calculated based on the input current and the input voltage; The output power is compared with a preset power range to determine whether the output power is within the power range; If the output power is not within the specified power range, a power alarm message is sent to the host computer.

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