Laser heating circuit and power-on self-test method thereof

Abstract

Laser heating circuit and power-on self-test method thereof, the power-on self-test method comprises: when in the initial power-on state, respectively obtaining the communication status between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit; when it is determined that the communication status is all available, respectively obtaining the first detection signal and the second detection signal according to the preset self-test items; when it is determined that the water supply status of the water cooling unit is in a normal state according to the first detection signal, and when it is determined that the power supply voltage of the power supply unit is the same as the preset voltage according to the second detection signal, establishing a power-on path and a cooling path; respectively outputting driving signals with different duty cycles to the heating unit, and obtaining the light intensity values ​​under different driving signals; when it is determined that the light intensity value under each driving signal is in a preset interval with the difference between the preset light intensity corresponding to each driving signal, ending the self-test process. The above technical solution can reduce the probability of abnormal situations occurring during the heating process.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of laser heating technology, and in particular to a laser heating circuit and a power-on self-test method thereof. Background Art

[0002] Laser heating is the process of heating the material to be heated by laser energy. The working process is as follows: the laser beam is emitted from the laser, transmitted and focused, and irradiated to the surface of the material. Part of it is reflected, and part of it enters the interior of the material and is absorbed by the material, so that the temperature of the surface of the material rises rapidly.

[0003] As a specific implementation of laser heating, laser heating circuits have a wide range of applications in various industrial, scientific and medical applications.

[0004] However, in actual heating, the heating scheme of the existing laser heating circuit still has problems. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a laser heating circuit and a power-on self-test method thereof, which can reduce the probability of abnormal situations occurring during the heating process.

[0006] An embodiment of the present invention provides a power-on self-test method for a laser heating circuit, wherein the laser heating circuit comprises: a controller, and a heating unit, a power supply unit, a motion control unit, and a water cooling unit respectively communicating with the controller, and the power-on self-test method comprises:

[0007] When the laser heating circuit is in an initial power-on state, respectively acquiring the communication states between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit;

[0008] When it is determined that the communication status between the controller and the heating unit, the power supply unit, the motion control unit and the water cooling unit is available, according to the preset self-test items, a first detection signal for characterizing the water supply status of the water cooling unit and a second detection signal for characterizing the power supply voltage of the power supply unit are respectively obtained;

[0009] When it is determined according to the first detection signal that the water supply state of the water cooling unit is in a normal state, and when it is determined according to the second detection signal that the supply voltage of the power supply unit is the same as the preset voltage, a power supply path between the power supply unit and the heating unit and the motion control unit, and a cooling path between the water cooling unit and the heating unit are established respectively;

[0010] Outputting driving signals with different duty cycles to the heating unit respectively, and obtaining light intensity values ​​of the heating unit under different driving signals;

[0011] When it is determined that the light intensity value of the heating unit under each driving signal and the difference between the preset light intensity corresponding to each driving signal are within a preset range, the self-checking process is ended.

[0012] In the above embodiment, by first judging the communication status between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit, and then judging the working performance of the water cooling unit, the power supply unit and the heating unit in turn, the fault factors can be eliminated in time, the operating safety of the laser heating circuit can be improved, and the probability of abnormal situations occurring during the heating process can be reduced, thereby improving the processing quality of the material to be heated.

[0013] Optionally, the laser heating circuit further comprises a terminal controller communicating with the controller;

[0014] When the laser heating circuit is in an initial power-on state, respectively obtaining the communication states between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit includes:

[0015] When the laser heating circuit is in an initial power-on state, the communication data between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit are transmitted to the terminal controller in sequence according to a preset sequence;

[0016] When the terminal controller displays the communication data and determines that the corresponding communication state is available, the next communication state is acquired according to the preset sequence until the last acquired communication state is available.

[0017] In the above embodiment, the self-checking step is performed only when it is determined that all communication states are in normal state, so as to avoid abnormal situations caused by the existence of unavailable communication states, and further improve the operation stability of the laser heating circuit. Optionally, the power-on self-checking method of the laser heating circuit also includes: when it is determined that one of the communication states is unavailable according to the preset sequence, stopping the acquisition process of the communication state, and generating a fault log in the terminal controller;

[0018] And, according to the fault log, after the communication link whose communication status is unavailable is repaired, the process of obtaining the communication status is re-executed.

[0019] In the above embodiment, when one of the communication states is unavailable, it means that there is a unit that cannot communicate with the controller. At this time, it is necessary to stop all communication state acquisition processes and generate a fault log in the terminal controller so that the operator can trace back and quickly locate the fault.

[0020] Optionally, the preset voltage includes a first voltage and a second voltage, and the first voltage is greater than the second voltage;

[0021] The acquiring of a second detection signal for characterizing the supply voltage of the power supply unit includes:

[0022] Obtaining a feedback voltage having a proportional relationship with the supply voltage by means of a resistor voltage division, wherein the proportional relationship is a voltage division coefficient;

[0023] comparing the feedback voltage with the first voltage to generate a first comparison signal, and comparing the feedback voltage with the second voltage to generate a second comparison signal;

[0024] After inverting the first comparison signal and the second comparison signal respectively, a logical OR operation is performed to generate the second detection signal.

[0025] In the above embodiment, by inverting the first comparison signal and the second comparison signal and then performing a logic OR operation, the second detection signal can follow the first comparison signal and / or the second comparison signal, thereby determining the voltage range of the feedback voltage to provide a strategy for adjusting the power supply unit, thereby further improving the operating stability of the laser heating circuit.

[0026] Optionally, in the steps of respectively outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, a motion control signal is also output to the motion control unit to change the position where the heating light beam is irradiated onto the motion control unit;

[0027] The motion control unit includes a stage and an image collector, the image collector is in communication with the controller and acquires an image containing the stage; the heating unit has a plurality of heating devices, and there is a preset mapping relationship between the coordinate value of each heating device and the coordinate value of the heating area on the stage, and the power-on self-test method also includes:

[0028] Acquire an image representing position information of the area to be heated on the motion control unit through the image collector, and generate a corresponding image acquisition signal to the controller;

[0029] The selected area to be heated is determined according to the position information contained in the image acquisition signal and the motion control signal, and the driven heating device is determined according to the position information and the preset mapping relationship and the heating requirement of the area to be heated.

[0030] In the above embodiment, the driven heating device can be determined to achieve targeted heating of the material to be heated, so that the heated material to be heated has better characteristics.

[0031] Optionally, the laser heating circuit further comprises a first temperature detection unit which is in communication with the controller and is disposed on the heating unit;

[0032] In the step of outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes:

[0033] When it is determined that the communication state between the first temperature detection unit and the controller is available, obtaining, through the first temperature detection unit, a first temperature value of the heating unit under different driving signals, and obtaining a second temperature value when the cooling path is not established;

[0034] When it is determined that the first temperature value of the heating unit under each driving signal and the first temperature difference between the second temperature value are both within the preset range, the self-check process is ended.

[0035] In the above embodiment, when it is determined that the multiple first temperature difference values ​​are all within the preset range, it means that the temperature of the heating unit can always meet the requirements, and thus the self-check process can be terminated to reduce the time required for the self-check.

[0036] Optionally, the laser heating circuit further comprises a second temperature detection unit communicating with the controller and used to obtain a second temperature of the material to be heated disposed on the motion control unit;

[0037] In the step of outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes:

[0038] When it is determined that the communication state between the second temperature detection unit and the controller is available, obtaining, through the second temperature detection unit, a third temperature value of the material to be heated under different driving signals;

[0039] When it is determined that the third temperature value of the material to be heated under each driving signal and the second temperature difference between the second preset temperature values ​​corresponding to each driving signal are within a preset interval, the self-checking process is terminated.

[0040] In the above-mentioned embodiments, the temperature of the corresponding area of ​​the material to be heated can be determined, thereby improving the accuracy of the detected temperature.

[0041] Optionally, after the self-check process is finished, the power-on self-check method of the laser heating circuit further includes:

[0042] Configuring the operating parameters of the laser heating circuit;

[0043] According to the working parameters, the laser heating circuit is driven to operate.

[0044] In the above embodiment, the self-test process ends, indicating that there is no abnormality in the communication within the laser heating circuit and that the laser heating circuit can meet the heating requirements. Therefore, the working parameters of the laser heating circuit can be configured to apply the laser heating circuit to the actual heating process, so that the laser heating circuit can produce devices with better quality.

[0045] Correspondingly, an embodiment of the present invention further provides a laser heating circuit, wherein the laser heating circuit is configured to perform a self-test process according to the power-on self-test method described in any of the aforementioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic diagram of the structure of a laser heating circuit is shown;

[0048] Figure 2 A schematic diagram of the structure of a laser heating circuit in an embodiment of the present invention is shown;

[0049] Figure 3 A flow chart of a power-on self-test method for a laser heating circuit is shown;

[0050] Figure 4 A flow chart of acquiring communication status in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0051] As described in the background technology, in actual heating, the existing laser heating scheme still has problems, because: Figure 1 A structural schematic diagram of a laser heating circuit is shown. When the power supply unit 10 starts to supply power (i.e., the laser heating circuit is in a power-on state), the controller 11 can output a control signal to the driver 12, and then the driver 12 can output a drive signal that matches the control signal, so that the laser heating array 13 performs a heating operation on the material to be processed.

[0052] During actual application, the inventors found that when the laser heating circuit is in the power-on state, the laser 11 can establish communication with the power supply unit 10 and determine whether the power supply unit 10 is normal through communication parameters, but it is impossible to determine whether the driver 12 and the laser heating array 13 are normal. If the driver 12 and the laser heating array 13 are abnormal, the laser heating array 13 will not be able to emit light or the light intensity will be low, which cannot meet the heating requirements, which will seriously reduce the processing quality.

[0053] In order to solve the above technical problems, an embodiment of the present invention provides a power-on self-test method for a laser heating circuit. When the laser heating circuit is in an initial power-on state, the communication status between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit can be respectively obtained, so as to determine whether the corresponding units in the laser heating circuit can successfully establish communication. In this way, when it is determined that the communication status between the controller and the heating unit, the power supply unit, the motion control unit and the water cooling unit are all available, it means that the corresponding units in the laser heating circuit can successfully establish communication, and the data between the units can be transmitted normally, so that according to the preset self-test items, the water supply status of the water cooling unit can be respectively obtained. The first detection signal and the second detection signal for characterizing the supply voltage of the power supply unit are used to determine that the water supply state of the water cooling unit is in a normal state, and when the supply voltage of the power supply unit is determined to be the same as the preset voltage, it indicates that the water supply and power supply functions of the laser heating circuit can be correctly implemented, so that the power-on path and the cooling path can be established, and then by outputting driving signals with different duty cycles to the heating unit respectively, and obtaining the light intensity values ​​of the heating unit under different driving signals, when it is determined that the light intensity values ​​of the heating unit under each driving signal are in a preset interval with the preset light intensity corresponding to each driving signal, it indicates that the heating unit can emit light normally, so that the self-check process can be ended. In other words, by first judging the communication state between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit, and then judging the working performance of the water cooling unit, the power supply unit and the heating unit in turn, the fault factors can be eliminated in time, the operation safety of the laser heating circuit can be improved, the probability of abnormal conditions occurring during the heating process can be reduced, and the processing quality of the material to be heated can be improved.

[0054] In order to enable those skilled in the art to better understand and implement the present invention, the specific scheme, principle, advantages and effects of the present invention are described in detail below through specific embodiments with reference to the accompanying drawings.

[0055] See also Figure 2 and Figure 3 ,in, Figure 2 is a schematic diagram of the structure of a laser heating circuit in an embodiment of the present invention, Figure 3 FIG. 1 is a flow chart of a power-on self-test method of a laser heating circuit in an embodiment of the present invention. Figure 2 As shown, the laser heating circuit may include: a controller 110, and a heating unit 140, a power supply unit 130, a motion control unit 150 and a water cooling unit 120 respectively communicating with the controller 110, wherein:

[0056] The controller 110 is adapted to generate a heating control signal in response to an input regulation signal.

[0057] The heating unit 140 is coupled to the controller 110 and is configured to output a heating beam corresponding to the heating control signal to the material to be processed (wherein the material to be processed can be placed on the stage 154) in response to the heating control signal; the heating unit 140 may include a driver 141 and a laser heating array 142 coupled to the driver 141, wherein the laser heating array 142 is used to output a heating beam.

[0058] The power supply unit 130 is coupled to the controller 110 and is used to provide an initial voltage for the laser heating circuit.

[0059] The water cooling unit 120 is coupled to the controller 110 and is suitable for responding to the temperature control adjustment signal output by the controller 110, selecting or disconnecting the flow path of the cooling medium to the heating unit 140, and adjusting the flow rate of the cooling medium according to the temperature of the cooling medium and the current temperature value of the heating unit 140.

[0060] The motion control unit 150 is coupled to the controller 110 and is suitable for changing the relative position of the material to be heated and the heating light beam in response to the motion control signal output by the controller 110; wherein the motion control unit 150 may include: a motor controller 151, connected to the controller 110, for generating a control signal consistent with the characterization direction of the motion control signal according to the motion control signal; a motor driver 152, connected to the motor controller 151, for generating a driving electrical signal corresponding to the control signal; a motor 153, respectively connected to the motor driver 152 and the stage 154, for generating a driving force for driving the stage 154 to rotate according to the driving electrical signal.

[0061] In this embodiment, the controller 110 exchanges data with the heating unit 140 , the power supply unit 130 , the motion control unit 150 , and the water cooling unit 120 according to a set communication method.

[0062] For example, the controller 110 communicates with the power supply unit 130 , the water cooling unit 120 , and the motion control unit 150 using the 485 communication protocol.

[0063] In this case, see Figure 3 , the self-test steps are as follows:

[0064] A. When the laser heating circuit is in an initial power-on state, the communication states between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit are respectively obtained.

[0065] Specifically, when the laser heating circuit is in the initial power-on state, it means that the laser heating circuit can perform a heating operation. At this time, by obtaining the communication status between the controller 110 and the water cooling unit 120, the communication status between the controller 110 and the power supply unit 130, the communication status between the controller 110 and the motion control unit 150, and the communication status between the controller 110 and the heating unit 140, it is possible to determine whether data transmission operations can be performed between the above-mentioned units, or in other words, it is possible to determine whether a linkage effect can be produced between multiple units that realize the heating process of the laser heating circuit.

[0066] And when the laser heating circuit is in the initial power-on state, the reason for first acquiring the communication status is that data transmission can only be realized when it is determined that the controller 110 and the heating unit 140, the power supply unit 130, the motion control unit 150 and the water cooling unit 120 can communicate normally. This is the basis for the laser heating circuit to emit a heating beam. Even if the controller 110, the heating unit 140, the power supply unit 130, the motion control unit 150 and the water cooling unit 120 can all work normally, but cannot communicate, the heating process cannot be controlled.

[0067] B. When it is determined that the communication status between the controller and the heating unit, the power supply unit, the motion control unit and the water cooling unit is available, according to preset self-test items, a first detection signal for characterizing the water supply status of the water cooling unit and a second detection signal for characterizing the power supply voltage of the power supply unit are respectively obtained.

[0068] Available means that data transmission operations can be performed normally between two units having communication requirements.

[0069] Specifically, when it is determined that the communication status between the controller 110 and the water cooling unit 120, the communication status between the controller 110 and the power supply unit 130, the communication status between the controller 110 and the motion control unit 150, and the communication status between the controller 110 and the heating unit 140 are all available, it means that the communication of the laser heating circuit is normal and the heating process will not be interrupted due to communication failure.

[0070] Then, according to the preset self-test items, a first detection signal for characterizing the water supply status of the water cooling unit 120 and a second detection signal for characterizing the power supply voltage of the power supply unit 130 are obtained respectively, so that it can be judged whether the water cooling unit 120 can provide cooling medium normally and whether the power supply unit 130 can supply power normally.

[0071] And when it is determined that the communication status is available, the steps of obtaining the first detection signal and the second detection signal are first performed because the power supply unit 130 is used to provide initial energy, and the water cooling unit 120 is used to ensure that the heating unit 140 is always at a temperature that can meet normal heating requirements. These two factors are crucial to the heating unit 140.

[0072] Furthermore, during the actual processing, it may happen that the power supply unit 130 can supply power normally, and the heating unit 140 can emit a heating beam to heat the material to be heated. However, during the heating process, the temperature of the heating unit 140 (such as the laser heating array 142) will rise. When the temperature is too high, it will affect the luminous efficiency of the heating unit 140 and even burn the heating unit 140.

[0073] In view of the above factors, when it is determined that the communication status is available, the present embodiment immediately performs a self-check process on the water cooling unit 120 and the power supply unit 130 .

[0074] C. When it is determined that the water supply state of the water cooling unit is in a normal state according to the first detection signal, and when it is determined that the power supply voltage of the power supply unit is the same as the preset voltage according to the second detection signal, an electrical path between the power supply unit and the heating unit, and the motion control unit, and a cooling path between the water cooling unit and the heating unit are respectively established.

[0075] Specifically, the first detection signal includes the water supply status of the water cooling unit 120 (such as water flow, water temperature and other parameters), and the water supply parameters are pre-set in the controller 110. In this way, when the first detection signal is obtained, it can be determined by performing a comparison operation that the water cooling unit 120 is in a normal state.

[0076] Similarly, the second detection signal includes the voltage status of the power supply unit 130 (for example, whether the voltage can meet the working requirements), and the power supply parameters are pre-set in the controller 110, so that when the second detection signal is obtained, it can be determined by performing a comparison operation that the power supply unit 130 is in a normal state.

[0077] In this way, when it is determined that the water cooling unit 120 and the power supply unit 130 are both in a normal state, an electrical path between the power supply unit 130 and the heating unit 140, an electrical path between the power supply unit 130 and the motion control unit 150, and a cooling path between the water cooling unit 120 and the heating unit 140 can be established to better control the heating process.

[0078] D, respectively outputting driving signals with different duty cycles to the heating unit, and obtaining the light intensity values ​​of the heating unit under different driving signals.

[0079] Specifically, the heating unit 140 usually needs to heat various different materials to be heated, and these materials require different heating temperatures, so the heating unit 140 needs to emit heating light beams with different light intensities, and thus can output driving signals with different duty cycles (for example, 5%, 10%, 15%, and 20%) to the heating unit 140 respectively. The duty cycles of the driving signals are different, and the current values ​​output to the laser heating array 142 are different, so that the heating unit 140 can emit heating light beams with different light intensities, and then the controller 110 can obtain the light intensity values ​​of the heating light beams under different driving signals.

[0080] In an optional example, the light intensity value of the heating light beam may be obtained by setting a sensor.

[0081] E. When it is determined that the light intensity value of the heating unit under each driving signal is within a preset range from the preset light intensity corresponding to each driving signal, the self-check process is terminated.

[0082] Specifically, the light intensity value of the heating unit 140 under each driving signal represents the heating capacity of the heating unit 140. In this way, when it is determined that the light intensity value of the heating unit 140 under each driving signal is within a preset range and the difference between the preset light intensity corresponding to each driving signal is within a preset range, it indicates that the laser heating circuit in the current state can perform the heating process normally, thereby terminating the self-test process and using the laser heating circuit to perform the heating operation.

[0083] In summary, by first judging the communication status between the controller and the water cooling unit, power supply unit, motion control unit and heating unit, and then judging the working performance of the water cooling unit, power supply unit and heating unit in turn, the fault factors can be eliminated in time, the operating safety of the laser heating circuit can be improved, and the probability of abnormal situations occurring during the heating process can be reduced, thereby improving the processing quality of the material to be heated.

[0084] In this embodiment, by executing steps A and B, the subsequent self-check operation is performed only after it is determined that the communication status is available, and thus the judgment of the communication status is crucial.

[0085] Based on this, see Figure 2 The laser heating circuit may further include a terminal controller 160 communicating with the controller 110, wherein the controller 110 and the terminal controller 160 perform data transmission based on the 232 communication protocol.

[0086] Thus, see Figure 4 In the flowchart of obtaining the communication status shown, step A may include:

[0087] A1, when the laser heating circuit is in an initial power-on state, the communication data between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit are transmitted to the terminal controller in sequence according to a preset order.

[0088] Specifically, when obtaining the communication status, there is a sequence. Specifically, this solution is to first obtain the communication status between the controller 110 and the water cooling unit 120, then obtain the communication status between the controller 110 and the power supply unit 130, then obtain the communication status between the controller 110 and the heating unit 140, and finally the communication status between the controller 110 and the motion control unit 150, or, obtain the communication status between the controller 110 and the motion control unit 150, and finally the communication status between the controller 110 and the heating unit 140.

[0089] And the communication status is acquired in a preset order, and the communication data is transmitted to the terminal controller 160 in any acquisition step.

[0090] A2, when the terminal controller 160 displays the communication data and determines that the corresponding communication status is available, the next communication status is obtained according to the preset sequence until the last communication status obtained is available.

[0091] Specifically, in any communication status acquisition step, the terminal controller 160 can display communication data, indicating that communication can be successfully carried out. Then, the communication status between the controller 110 and the next unit can be acquired in a preset order, and so on, until the last communication status acquired is available.

[0092] As an optional example, if the present solution is to first obtain the communication status between the controller 110 and the water cooling unit 120, then obtain the communication status between the controller 110 and the power supply unit 130, then obtain the communication status between the controller 110 and the heating unit 140, and finally obtain the communication status between the controller 110 and the motion control unit 150, then after determining that the communication data related to the water cooling unit 120 is displayed, it means that the controller 110 and the water cooling unit 120 can communicate normally, after determining that the communication data related to the power supply unit 130 is displayed, it means that the controller 110 and the power supply unit 130 can communicate normally, after determining that the communication data related to the heating unit 140 is displayed, it means that the controller 110 and the heating unit 140 can communicate normally, and after determining that the communication data related to the motion control unit 150 is displayed, it means that the controller 110 and the motion control unit 150 can communicate normally.

[0093] In other words, the self-check step is performed only when it is determined that all communication states are normal, which can avoid abnormal situations caused by the existence of an unavailable communication state and further improve the operating stability of the laser heating circuit.

[0094] In actual application, when the communication status is obtained according to the preset order, at least one of the communication statuses is unavailable (ie, the communication data cannot be transmitted), and further processing is required.

[0095] See next Figure 4 A3, when it is determined that one of the communication states is unavailable (or the terminal controller 160 cannot display the communication data) according to the preset order, the communication state acquisition process is stopped and a fault log is generated.

[0096] Specifically, when one of the communication statuses is unavailable, it means that there is a unit that cannot communicate with the controller 110. At this time, it is necessary to stop all communication status acquisition processes. At the same time, a fault log is generated in the terminal controller 160. The fault log can display the unit that is currently unable to communicate with the controller 110, so that the operator can trace it back and quickly locate it.

[0097] A4, according to the fault log, after the communication link whose communication status is unavailable is repaired, the process of obtaining the communication status is re-executed.

[0098] Specifically, the fault log can display the units that are currently unable to communicate with the controller 110. When the fault log is obtained, the communication link with an unavailable communication status can be repaired, and then the current and subsequent processes of obtaining the communication status can be re-executed.

[0099] For example, if the communication status is unavailable and it is determined through the fault log that the controller 110 cannot communicate with the water cooling unit 120, the subsequent steps of obtaining the communication status between the controller 110 and the power supply unit 130, the communication status between the controller 110 and the heating unit 140, and the communication status between the controller 110 and the motion control unit 150 are stopped, and the link between the water cooling unit 120 and the controller 110 is repaired. After the repair is completed, the step of obtaining the communication status between the controller 110 and the water cooling unit 120 is executed again, and when it is determined that the communication status between the controller 110 and the water cooling unit 120 is available, the subsequent communication status is obtained in a preset order.

[0100] In short, when it is determined that there is a communication state that is unavailable, all communication state acquisition processes are stopped, and when it is determined that there is a communication state that is available, subsequent communication state acquisition processes are executed in a preset order.

[0101] During the actual heating process, there are some small fluctuations in the voltage value provided by the power supply unit 130, and these small fluctuations do not affect the heating process, so the preset voltage can include a first voltage and a second voltage, and the first voltage is greater than the second voltage.

[0102] In this case, for step B, the second detection signal for characterizing the power supply voltage of the power supply unit may be obtained in the following manner:

[0103] B1, obtaining a feedback voltage having a proportional relationship with the supply voltage by means of a resistor voltage division, wherein the proportional relationship is a voltage division coefficient.

[0104] Specifically, a voltage divider unit composed of resistors is provided between the output ends of the controller 110 and the power supply unit 130, so that the voltage divider coefficient can be determined by the resistance values ​​between the resistors, so that the supply voltage is fed back according to the voltage divider coefficient, thereby obtaining a feedback voltage.

[0105] B2, comparing the feedback voltage with the first voltage to generate a first comparison signal, and comparing the feedback voltage with the second voltage to generate a second comparison signal.

[0106] Specifically, based on the relative magnitudes between the feedback voltage and the first voltage, and the relative magnitudes between the feedback voltage and the second voltage, the first comparison signal and the second comparison signal having different states can be output.

[0107] B3, after inverting the first comparison signal and the second comparison signal respectively, perform a logic OR operation to generate the second detection signal.

[0108] Specifically, by inverting the first comparison signal and the second comparison signal and then performing a logic OR operation, the second detection signal can follow the first comparison signal and / or the second comparison signal, thereby determining the voltage range of the feedback voltage to provide a strategy for adjusting the power supply unit 130.

[0109] For example, if the feedback voltage is greater than the first voltage, it is naturally greater than the second voltage. The feedback voltage is compared with the first voltage (for example, by comparing the feedback voltage and the first voltage as the input terminals of the comparator), and the generated first comparison signal has a first level 0. After the inversion operation, the first inverted signal has a second level 1; and the feedback voltage is compared with the second voltage (for example, by comparing the feedback voltage and the second voltage as the input terminals of the comparator), and the generated second comparison signal has a second level 1, then after the inversion operation, the second inverted signal has a second level 0. After the logic OR operation, the second detection signal has a second level 1. At this time, when the power supply voltage is different from the preset voltage, the power path cannot be established.

[0110] For example, if the feedback voltage is less than the first voltage but greater than the second voltage, the feedback voltage is compared with the first voltage (for example, by comparing the feedback voltage and the first voltage as the input terminals of the comparator), and the generated first comparison signal has a second level 1, then after the inversion operation, the first inverted signal has a first level 0; and the feedback voltage is compared with the second voltage (for example, by comparing the feedback voltage and the second voltage as the input terminals of the comparator), and the generated second comparison signal has a second level 1, then after the inversion operation, the second inverted signal has a first level 0, and after the logic OR operation, the second detection signal has the first level 0. At this time, when the supply voltage is the same as the preset voltage, a power-on path can be established.

[0111] For example, if the feedback voltage is less than the second voltage, the feedback voltage is compared with the first voltage (for example, by comparing the feedback voltage and the first voltage as the input terminals of the comparator), and the generated first comparison signal has a second level 1, then after the inversion operation, the first inverted signal has a first level 0; and the feedback voltage is compared with the second voltage (for example, by comparing the feedback voltage and the second voltage as the input terminals of the comparator), and the generated second comparison signal has a first level 0, then after the inversion operation, the second inverted signal has a second level 1, and after the logic OR operation, the second detection signal has the second level 1. At this time, when the supply voltage is different from the preset voltage, the power path cannot be established.

[0112] Therefore, through the above content analysis, the controller 110 can determine whether a power-on path needs to be established based on the level state of the acquired second detection signal.

[0113] As an optional example, based on the second detection signal, it is determined that the supply voltage of the power supply unit is the same as the preset voltage, and based on the second detection signal, the first switch between the controller and the heating unit and the second switch between the controller and the motion control unit are turned on to select the power path.

[0114] In some other embodiments, the second detection signal for characterizing the power supply voltage of the power supply unit may be obtained by other means, such as a sensor.

[0115] In the actual processing steps, some targeted heating is often required, for example, a laser in a processing heating array in a certain area heats one area of ​​the material to be heated, so that the heated material to be heated has better properties.

[0116] Based on this, in the steps of outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, (controller 110) also outputs a motion control signal to the motion control unit 150 to change the position of the heating light beam irradiated to the motion control unit 150.

[0117] Accordingly, the motion control unit 150 may include a stage 154 and an image collector (not shown in the figure), the image collector is in communication with the controller 110 and acquires an image including the stage 154; the laser heating array 142 has a plurality of heating devices (not shown in the figure), and there is a preset mapping relationship between the coordinate value of each heating device and the coordinate value of the heating area on the stage 154, and the power-on self-test method further includes:

[0118] 1) acquiring an image representing position information of the area to be heated on the motion control unit through the image collector, and generating a corresponding image acquisition signal to the controller;

[0119] 2) Determine the selected area to be heated according to the position information contained in the image acquisition signal and the motion control signal, and determine the driven heating array according to the position information and the preset mapping relationship and the heating requirement of the area to be heated.

[0120] Specifically, the image acquisition device can collect the current position information of the area to be heated in real time, so that the controller can determine whether the current position information of the area to be heated is consistent with the set position information. If they are consistent, the driven heating device can be determined based on the area to be heated on the selected stage, the position information of the area to be heated and the preset mapping relationship, as well as the heating requirements of the area to be heated (indicating the number of heating devices required) to achieve targeted heating.

[0121] In this embodiment, as mentioned above, the temperature of the heating unit 140 will also increase during the heating process, and therefore it is also necessary to detect the temperature of the heating unit 140 in real time.

[0122] In a specific embodiment, the laser heating circuit may further include a first temperature detection unit (not shown) that communicates with the controller 110 and is disposed on the heating unit 140 .

[0123] Correspondingly, in the step of respectively outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes:

[0124] When it is determined that the communication status between the first temperature detection unit and the controller is available, the first temperature detection unit is used to obtain the first temperature value of the heating unit under different driving signals and the second temperature value when the cooling path is not established; when it is determined that the difference between the first temperature value of the heating unit under each driving signal and the second temperature value is within a preset range, the working parameters of the laser heating circuit are configured.

[0125] Specifically, when it is determined that the communication status between the first temperature detection unit and the controller is available, it means that data can be transmitted between the first temperature detection unit and the controller. At this time, through the first temperature detection unit, the first temperature value of the heating unit under different driving signals can be obtained, and the second temperature value when the cooling path is not established can be obtained.

[0126] In order to ensure the consistency of the heating efficiency of the heating unit, the temperature of the heating unit when in the heating state can be made basically consistent with that in the initial state (this is because the water cooling unit plays a cooling role). Therefore, the first temperature value of the heating unit under each driving signal and the first temperature difference between the second temperature value can be calculated. When it is determined that multiple first temperature differences are all in the preset range, it means that the temperature of the heating unit can always meet the requirements, and thus the self-test process can be terminated.

[0127] In this embodiment, the state of the heating unit can be determined by obtaining the light intensity value of the heating beam, and the heating beam is used to heat the material to be heated. Therefore, by detecting the temperature of the material to be heated, it can also be determined whether the current heating unit can further meet the heating requirements.

[0128] In a specific embodiment, see Figure 2 The laser heating circuit may further include a second temperature detection unit 170 that communicates with the controller 110 and is used to obtain the temperature of the material to be heated that is disposed on the motion control unit 150 .

[0129] Correspondingly, in the step of respectively outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes:

[0130] When it is determined that the communication state between the second temperature detection unit 170 and the controller 110 is available, obtaining a third temperature value of the material to be heated under different driving signals through the second temperature detection unit 170;

[0131] When it is determined that the third temperature value of the material to be heated under each driving signal and the second temperature difference between the second preset temperature values ​​corresponding to each driving signal are within a preset interval, the self-checking process is terminated.

[0132] Specifically, when it is determined that the communication status between the second temperature detection unit 170 and the controller 110 is available, it means that data can be transmitted between the controllers 110 and 110. At this time, the third temperature value of the material to be heated under different driving signals can be obtained through the second temperature detection unit 171.

[0133] The material to be heated has the same processing temperature value (i.e., the second preset temperature value) under different driving signals, so the third temperature value of the material to be heated under each driving signal and the second temperature difference between the second preset temperature value can be calculated. When the second temperature difference is within the preset range, it means that the temperature of the heating unit can make the material to be heated reach the set temperature, and thus the self-inspection process can be terminated.

[0134] In this embodiment, the heating unit 140 (for example, the laser heating array 142) may include a plurality of heating devices arranged in an array (not shown in the figure), and the second temperature detection unit 170 may include a plurality of temperature detectors (not shown in the figure), and the temperature detection area formed by the plurality of temperature detectors surrounds all the heating devices, so that the third temperature value of the material to be heated under different driving signals is obtained through the second temperature detection unit 170, including:

[0135] Starting from the position of the temperature detection device located at the center of the array, along the package radius direction of the heating device, the heating devices located at different positions constitute a plurality of heating areas, and one heating area corresponds to a heated area of ​​the material to be heated, and a second temperature detection signal is obtained through the temperature detector; according to the first temperature detected by the temperature detection device located at the center of the array contained in the second temperature detection signal, the second temperature detected by one of the other temperature detection devices, and the number of heating areas between the temperature detection device and the corresponding temperature detection device, the temperature of each heating area is determined, and the temperature of all heating areas is used as the surface temperature of the material to be heated.

[0136] Specifically, starting from the position of the temperature detection device at the center of the array, along the package radius of the heating device, the heating devices at different positions can form multiple heating areas, and one heating area corresponds to a heated area of ​​the material to be heated.

[0137] In this case, the controller 110 can be used to determine the temperature of each heating area based on the first temperature detected by the temperature detection device (for example, the first temperature detection device) located at the center of the array contained in the first temperature detection signal, the second temperature detected by one of the other temperature detection devices, and the number of heating areas between the temperature detection device and the corresponding temperature detection device, and use the temperature of the heating area as the temperature of the surface of the material to be heated.

[0138] Specifically, for any temperature detection device, it detects the temperature of one point of the material to be heated, or the temperature of the point and its vicinity, and cannot obtain the temperature of an area. By taking the first temperature detection device in the central area as a reference, multiple concentric heating areas with different areas can be determined. In this way, the controller can obtain the first temperature based on the first temperature detection device in the central area and the second temperature obtained by another temperature detection device on one of the diameters, and determine the temperature of any heating area through modeling. Since each heating area corresponds to the material to be heated, the temperature of the corresponding area of ​​the material to be heated can be determined, which can improve the accuracy of the detected temperature.

[0139] More specifically, the controller is used to determine the temperature difference between adjacent heating areas based on the difference between the first temperature and the second temperature, and the number of heating areas passed by the temperature detection device and the corresponding temperature detector, and to determine the temperature of each heating area based on the first temperature and the position of the heating area and the temperature difference.

[0140] It should be noted that the reason why the above-mentioned temperature determination method can be adopted is that the parameters of the heating devices at different positions are consistent. When the heating control signal is obtained, the parameters of the heating light beams emitted by each heating device are basically the same. Therefore, the temperature value of each heating area can be determined based on the number of heating areas passed by the temperature detection device and the corresponding temperature detector, and the temperature detected by the temperature detection device and the corresponding temperature detector.

[0141] It can be understood that the self-test items described in the above examples are only illustrative. In actual application, other self-test items can also be performed. This embodiment only lists examples to illustrate that the above method can be used to implement the power-on self-test of the laser heating circuit.

[0142] In this embodiment, after the self-check process is finished, the working parameters of the laser heating circuit may be configured; and the laser heating circuit may be driven to operate according to the working parameters.

[0143] Specifically, the end of the self-test process indicates that there is no abnormality in the communication within the laser heating circuit and that the laser heating circuit can meet the heating requirements. Therefore, the working parameters of the laser heating circuit can be configured to apply the laser heating circuit to the actual heating process, so that the laser heating circuit can produce better quality devices.

[0144] It can be understood that the above describes multiple implementation schemes provided by the embodiments of the present invention, and the various optional methods introduced in each implementation scheme can be combined and cross-referenced with each other without conflict, thereby extending a variety of possible implementation schemes, which can all be regarded as implementation schemes disclosed and invented by the present invention.

[0145] An embodiment of the present invention further provides a laser heating circuit, which can be applied to the power-on self-test method described in any of the above examples to perform a self-test process.

[0146] It is understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined by the terms "first", "second", etc. may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or indicate importance. It is understood that the terms used in this way are interchangeable where appropriate so that the embodiments of the invention described herein can be implemented in an order other than those illustrated or described herein.

[0147] Although the embodiments of the present invention are disclosed above, the invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A power-on self-test method for a laser heating circuit, characterized in that: The laser heating circuit includes: a controller, and a heating unit, a power supply unit, a motion control unit and a water cooling unit respectively communicating with the controller, wherein the motion control unit includes: a stage and an image collector, the image collector is connected to the controller for communication and acquires an image containing the stage, the heating unit has a plurality of heating devices, and there is a preset mapping relationship between the coordinate value of each heating device and the coordinate value of the heating area on the stage, and the power-on self-test method includes: When the laser heating circuit is in an initial power-on state, respectively acquiring the communication states between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit; When it is determined that the communication status between the controller and the heating unit, the power supply unit, the motion control unit and the water cooling unit is available, a first detection signal for characterizing the water supply status of the water cooling unit and a second detection signal for characterizing the power supply voltage of the power supply unit are respectively obtained according to preset self-test items, wherein the preset voltage includes a first voltage and a second voltage, and the first voltage is greater than the second voltage; the obtaining of the second detection signal for characterizing the power supply voltage of the power supply unit includes: obtaining a feedback voltage having a proportional relationship with the power supply voltage by means of a resistor voltage divider, wherein the proportional relationship is a voltage division coefficient; comparing the feedback voltage with the first voltage to generate a first comparison signal, and comparing the feedback voltage with the second voltage to generate a second comparison signal; after inverting the first comparison signal and the second comparison signal respectively, performing a logical OR operation to generate the second detection signal; When it is determined according to the first detection signal that the water supply state of the water cooling unit is in a normal state, and when it is determined according to the second detection signal that the supply voltage of the power supply unit is the same as the preset voltage, a power supply path between the power supply unit and the heating unit and the motion control unit, and a cooling path between the water cooling unit and the heating unit are established respectively; Outputting driving signals with different duty cycles to the heating unit respectively, acquiring the light intensity values ​​of the heating unit under different driving signals, and outputting motion control signals to the motion control unit to change the position of the heating light beam irradiated to the motion control unit, including: acquiring an image representing the position information of the area to be heated on the motion control unit through the image acquisition device, and generating a corresponding image acquisition signal to the controller; determining the selected area to be heated according to the position information contained in the image acquisition signal and the motion control signal, and determining the driven heating device according to the mapping relationship between the position information and the preset mapping relationship, and the heating demand of the area to be heated; When it is determined that the light intensity value of the heating unit under each driving signal and the difference between the preset light intensity corresponding to each driving signal are within a preset range, the self-checking process is ended.

2. The power-on self-test method of the laser heating circuit according to claim 1, characterized in that: The laser heating circuit also includes a terminal controller communicating with the controller; When the laser heating circuit is in an initial power-on state, respectively obtaining the communication states between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit includes: When the laser heating circuit is in an initial power-on state, the communication data between the controller and the water cooling unit, the power supply unit, the motion control unit and the heating unit are transmitted to the terminal controller in sequence according to a preset sequence; When the terminal controller displays the communication data and determines that the corresponding communication state is available, the next communication state is acquired according to the preset sequence until the last acquired communication state is available.

3. The power-on self-test method of the laser heating circuit according to claim 2, characterized in that: It also includes: when it is determined that one of the communication states is unavailable according to the preset sequence, stopping the acquisition process of the communication state and generating a fault log in the terminal controller; And, according to the fault log, after the communication link whose communication status is unavailable is repaired, the process of obtaining the communication status is re-executed.

4. The power-on self-test method of the laser heating circuit according to claim 1, characterized in that: The laser heating circuit also includes a first temperature detection unit that communicates with the controller and is disposed on the heating unit; In the step of outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes: When it is determined that the communication state between the first temperature detection unit and the controller is available, obtaining, through the first temperature detection unit, a first temperature value of the heating unit under different driving signals, and obtaining a second temperature value when the cooling path is not established; When it is determined that the first temperature value of the heating unit under each driving signal and the first temperature difference between the second temperature value are both within the preset range, the self-check process is ended.

5. The power-on self-test method of the laser heating circuit according to claim 1, characterized in that: The laser heating circuit further includes a second temperature detection unit in communication with the controller and configured to obtain a temperature of the material to be heated disposed on the motion control unit; In the step of outputting driving signals with different duty cycles to the heating unit and obtaining the light intensity values ​​of the heating unit under different driving signals, the power-on self-test method further includes: When it is determined that the communication state between the second temperature detection unit and the controller is available, obtaining, through the second temperature detection unit, a third temperature value of the material to be heated under different driving signals; When it is determined that the third temperature value of the material to be heated under each driving signal and the second temperature difference between the second preset temperature values ​​corresponding to each driving signal are within a preset interval, the self-checking process is terminated.

6. The power-on self-test method of the laser heating circuit according to claim 5, characterized in that: The heating unit includes a plurality of heating devices arranged in an array, the second temperature detection unit includes a plurality of temperature detectors, and a temperature detection area formed by the plurality of temperature detectors surrounds all the heating devices; The step of obtaining the second temperature value of the material to be heated under different driving signals by the second temperature detection unit includes: Taking the position of the temperature detection device at the center of the array as the starting point, along the package radius direction of the heating device, the heating devices at different positions form a plurality of heating areas, and one heating area corresponds to a heated area of ​​the material to be heated, and a second temperature detection signal is obtained through the temperature detector; Based on the first temperature detected by the temperature detection device located at the center of the array contained in the second temperature detection signal, the second temperature detected by one of the other temperature detection devices, and the number of heating areas between the temperature detection device and the corresponding temperature detection device, the temperature of each heating area is determined, and the temperature of all the heating areas is used as the temperature of the surface of the material to be heated.

7. The power-on self-test method of the laser heating circuit according to claim 1, characterized in that: After the self-check process is completed, it also includes: Configuring the operating parameters of the laser heating circuit; According to the working parameters, the laser heating circuit is driven to operate.

8. A laser heating circuit, characterized in that: The laser heating circuit is configured to perform a self-test process according to the power-on self-test method according to any one of claims 1 to 7.

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