CN209075878U - A kind of laser control system - Google Patents
A kind of laser control system Download PDFInfo
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- CN209075878U CN209075878U CN201820402402.8U CN201820402402U CN209075878U CN 209075878 U CN209075878 U CN 209075878U CN 201820402402 U CN201820402402 U CN 201820402402U CN 209075878 U CN209075878 U CN 209075878U
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- 238000002647 laser therapy Methods 0.000 abstract description 2
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- 206010061218 Inflammation Diseases 0.000 description 1
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Abstract
The utility model embodiment discloses a kind of laser control system, the first analog control voltage is exported by voltage output module, voltage feedback module receives the first analog control voltage of voltage output module output, and voltage feedback information will be generated according to the first analog control voltage, so that control module is corrected the voltage output module according to the voltage feedback information that voltage feedback module exports and exports the second analog control voltage, solve that there are unstability during exporting analog voltage due to laser controller, to which the analog voltage for causing laser controller to export is fluctuated, and then laser is caused to lead to the problem of unstable illumination beam, realize the output power for accurately controlling laser, so as to so that laser issues suitable laser irradiation light beam, improve the effect of laser therapy.
Description
Technical Field
The embodiment of the utility model provides a relate to the laser control field, especially relate to a laser control system.
Background
Laser therapy is a technical means for irradiating human tissues by using a laser to generate irradiation beams, and can help patients relieve or eliminate pains, improve local blood circulation, repair tissues and quickly diminish inflammation and relieve pain. At present, the laser can be controlled through the laser control system, when the laser control system is used, the laser control system can output analog voltage, the laser can receive the analog voltage output by the laser control system, and the purpose that the laser control system controls the laser can be achieved through the relation between the analog voltage of the input end of the laser and the power of the output end of the laser.
In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:
although the laser controller can effectively control the output power of the laser by outputting the analog voltage, the analog voltage output by the laser controller is suddenly high and suddenly low due to instability of the laser controller in the process of outputting the analog voltage, and thus the laser generates an unstable irradiation beam. Especially, when a patient is in the process of laser treatment, if the analog voltage value output by the laser controller is too high, the laser can output a high-power irradiation beam, and the patient can be injured by mistake.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a laser control system can control the output of laser instrument more accurately to can make the laser instrument send suitable laser and shine the light beam, realize promoting the effect of laser treatment effect.
An embodiment of the utility model provides a laser control system, the system includes: the voltage feedback control system comprises a voltage output module, a voltage feedback module and a control module; wherein,
the voltage output module is connected with the voltage feedback module and used for outputting a first analog control voltage according to a voltage parameter input by a user and outputting the first analog control voltage to the voltage feedback module;
the voltage feedback module is connected with the control module and used for receiving the first analog control voltage output by the voltage output module; generating voltage feedback information according to the first analog control voltage, and feeding the voltage feedback information back to the control module;
the control module is connected with the voltage output module and used for correcting the voltage output module to output a second analog control voltage according to the voltage feedback information; the first analog control voltage is an analog control voltage output by the voltage output module before correction; the second analog control voltage is the analog control voltage output by the voltage output module after correction.
Further, the voltage output module is a digital-to-analog converter DAC built in a microprocessor controller of STM32 series.
Further, the voltage feedback module comprises: the circuit comprises a first voltage follower circuit and an analog-digital conversion circuit; the first voltage follower circuit is used for receiving the first analog control voltage and carrying out voltage stabilization regulation on the first analog control voltage; the analog-digital conversion circuit is used for converting the first analog control voltage after voltage stabilization regulation into a corresponding digital feedback signal and feeding the digital feedback signal back to the control module.
Further, the first voltage follower circuit is an operational amplifier of the OPA350 series; the analog-digital conversion circuit is an analog-digital converter ADC built in a microprocessor controller of STM32 series.
Further, the system further comprises: the overvoltage protection module is respectively connected with the voltage output module and the voltage feedback module and is used for receiving the first analog control voltage output by the voltage output module; and when the first analog control voltage meets a preset voltage threshold condition, outputting the first analog control voltage to the voltage feedback module.
Further, the overvoltage protection module comprises: the second voltage follower circuit and the overvoltage protection circuit; the second voltage follower circuit is used for carrying out voltage stabilization regulation on the first analog control voltage; the overvoltage protection circuit is used for outputting the regulated first analog control voltage to the voltage feedback module when the regulated first analog control voltage meets a preset voltage threshold condition.
Further, the second voltage follower circuit is an OPA350 series operational amplifier; the overvoltage protection circuit is a voltage stabilizing diode.
Further, the system further comprises: the external communication module is connected with the control module and used for receiving the alarm information sent by the control module; the alarm information is the information that the first analog control voltage output by the voltage output module is abnormal.
Further, the system further comprises: the switch module is connected with the control module and used for inputting an instruction for turning on the laser or an instruction for turning off the laser to the control module; the control module is further used for outputting a high level signal to the laser according to the instruction for turning on the laser, so that the laser is controlled to output a laser irradiation beam when receiving the high level signal and the first analog control voltage meet a preset voltage value; and the control circuit is also used for outputting a low level signal to the laser according to the instruction for turning off the laser, so that the laser is controlled to stop outputting the laser irradiation beam when receiving the low level signal or the first analog control voltage does not meet a preset voltage value.
Further, the first analog control voltage or the second analog control voltage is a continuously output analog control voltage or an intermittently output analog control voltage.
The embodiment of the utility model provides a laser control system, through the first analog control voltage of voltage output module output, the first analog control voltage of voltage output module output is received to the voltage feedback module to will be according to first analog control voltage generation voltage feedback information, make control module rectify according to the voltage feedback information of voltage feedback module output voltage output module output second analog control voltage. The embodiment of the utility model provides a solve because there is the instability in the in-process of laser controller at output analog voltage to cause the analog voltage of laser controller output to neglect high suddenly low, and then lead to the laser instrument to produce the unstable problem of shining the light beam, realize controlling the output of laser instrument accurately, thereby can make the laser instrument send suitable laser and shine the light beam, promoted laser treatment's effect.
Drawings
Fig. 1 is a schematic structural diagram of a laser control system according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a first voltage follower circuit according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laser control system according to a second embodiment of the present invention;
fig. 4 is a circuit diagram of an overvoltage protection module according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a laser control system according to a third embodiment of the present invention;
fig. 6 is a circuit diagram of an external communication module according to a third embodiment of the present invention;
fig. 7 is a circuit diagram of a switch module according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is the embodiment of the present invention provides a schematic structural diagram of a laser control system, which can be applied to a control device of a laser, as shown in fig. 1, the laser control system 10 includes: a voltage output module 101, a voltage feedback module 102 and a control module 103; wherein:
and the voltage output module 101 is connected to the voltage feedback module 102, and is configured to output a first analog control voltage according to a voltage parameter input by a user, and output the first analog control voltage to the voltage feedback module 102.
The voltage feedback module 102 is connected with the control module 103 and is used for receiving the first analog control voltage output by the voltage output module 101; voltage feedback information is generated from the first analog control voltage and fed back to the control module 103.
The control module 103 is connected with the voltage output module 101 and used for correcting the voltage output module 101 to output a second analog control voltage according to the voltage feedback information; the first analog control voltage is an analog control voltage output by the voltage output module 101 before correction; the second analog control voltage is an analog control voltage output by the voltage output module 101 after correction.
In this embodiment, the voltage output module 101 may output the first analog control voltage according to a voltage parameter input by a user. Wherein the first analog control voltage may be an analog voltage signal. In the process of outputting the first analog control voltage by the voltage output module 101, a certain deviation may exist between the first analog control voltage actually output by the voltage output module 101 and the first analog control voltage which is required to be expected to be output and corresponds to the voltage parameter input by the user. For example, the voltage parameter input by the user requires that the magnitude of the analog control voltage expected to be output by the voltage output module 101 may not be the same as the magnitude of the analog control voltage actually output by the voltage output module 101, so that the magnitude of the first analog control voltage output by the voltage output module 101 may not meet the requirement of the user. In order to ensure that the first analog control voltage output by the voltage output module 101 meets the requirement of a user, the output end of the voltage output module 101 may be connected to the input end of the voltage feedback module 102, and after the voltage output module 101 outputs the first analog control voltage, the first analog control voltage may be output to the voltage feedback module 102 in real time, so that the voltage feedback module 102 feeds back the first analog control voltage in time.
In this embodiment, the voltage feedback module 102 may receive the first analog control voltage output by the voltage output module 101. The voltage feedback module 102 may be connected to an input end of the control module 103, and the voltage feedback module 102 may generate corresponding voltage feedback information according to the first analog control voltage and feed the voltage feedback information back to the control module 103. The voltage feedback information may include a voltage value of the first analog control voltage, and the control module 103 may be connected to an output terminal of the voltage feedback module 102 and an input terminal of the voltage output module 101. The control module 103 may analyze the voltage feedback information output by the voltage feedback module 102, and determine whether the first analog control voltage output by the voltage output module 101 meets the parameter requirement corresponding to the voltage parameter input by the user through the analysis of the voltage feedback information. When it is determined by the control module 103 that the first analog control voltage output by the voltage output module 101 cannot meet the user requirement, the control module 103 may control the output of the voltage output module to perform appropriate adjustment, so that the voltage output module 101 outputs the second analog control voltage under the control of the control module. The first analog control voltage is an analog control voltage output by the voltage output module 101 before correction; the second analog control voltage is an analog control voltage output by the voltage output module 101 after correction. When the control module 103 determines that the first analog control voltage output by the voltage output module 101 meets the user requirement, the control module 103 does not need to correct the first analog control voltage output by the voltage output module 101, and the voltage output module 103 is only required to continuously output the first analog control voltage. The first analog control voltage meeting the user requirement may be that a deviation between a first analog control voltage which is expected to be output and is corresponding to a voltage parameter input by a user and the first analog control voltage actually output by the voltage output module 101 is within a preset threshold range. For example, when the voltage parameter input by the user requires that the deviation between the magnitude of the analog control voltage expected to be output by the voltage output module 101 and the magnitude of the analog control voltage actually output by the voltage output module 101 does not exceed ± 0.1V, the first analog control voltage may be considered to meet the user requirement; when the voltage parameter input by the user requires that the deviation between the magnitude of the analog control voltage expected to be output by the voltage output module 101 and the magnitude of the analog control voltage actually output by the voltage output module 101 exceeds ± 0.1V, it can be considered that the first analog control voltage cannot satisfy the user requirement.
On the basis of the above embodiment, the voltage output module 101 may be a digital-to-analog conversion circuit, for example, the voltage output module 101 may be a digital-to-analog converter DAC built in a microprocessor controller of the STM32 series. Specifically, a digital-to-analog converter DAC built in the STM 32-series microprocessor controller may convert a digital signal corresponding to a voltage parameter input by a user into a corresponding analog signal, and output the converted analog signal as a first analog control voltage. Alternatively, the voltage output module 101 may be a digital-to-analog converter DAC built in an STM32F407ZG chip.
On the basis of the above embodiment, the voltage feedback module 102 includes: a first voltage follower circuit 1021 and an analog-digital conversion circuit 1022; the first voltage follower circuit 1021 is used for receiving the first analog control voltage and performing voltage stabilization regulation on the first analog control voltage; the analog-to-digital conversion circuit 1022 is configured to convert the regulated first analog control voltage into a corresponding digital feedback signal, and feed back the digital feedback signal to the control module 103.
In this embodiment, referring to fig. 1, there may be some fluctuation in the first analog control voltage output by the voltage output module 101, and in order to ensure that the voltage feedback module 102 can receive the stable first analog control voltage, a first voltage follower circuit 1021 may be added to the voltage feedback module 102. An input end of the first voltage follower circuit 1021 may be connected to an output end of the voltage output module 101, and the first voltage follower circuit 1021 may receive the first analog control voltage output from the output end of the voltage output module 101 and perform voltage stabilization adjustment on the first analog control voltage. The output end of the first voltage follower circuit 1021 may be connected to the input end of the analog-to-digital conversion circuit 1022, the analog-to-digital conversion circuit 1022 may convert the regulated first analog control voltage into a corresponding digital feedback signal, and feed the digital feedback signal back to the control module 103, so that the control module 103 may analyze and process the digital feedback signal output by the analog-to-digital conversion circuit 1022 in the voltage feedback module 102, and may determine whether the first analog control voltage output by the voltage output module 101 meets the parameter requirement corresponding to the voltage parameter input by the user according to the analysis and processing result of the digital feedback signal.
Alternatively, the first voltage follower circuit 1021 may be an operational amplifier of the OPA350 series; the analog-to-digital conversion circuit 1022 may be an analog-to-digital converter ADC built in a microprocessor controller of the STM32 series. In order to reduce the size of the laser control board 10 as much as possible, the DAC in the voltage output module 101 and the ADC in the voltage feedback module 102 may directly adopt a micro-processing controller of the STM32 series, and the micro-processing controller of the STM32 series integrates the DAC and the ADC with high precision. Optionally, the STM32 series microprocessor controller can select the main control chip of STM32F4 series, and each index of DAC in the main control chip of STM32F4 series can satisfy the requirement of the voltage output module 101, and simultaneously, the function expansion of the laser control system 10 is conveniently performed subsequently.
For example, fig. 2 is a circuit diagram of a first voltage follower circuit according to an embodiment of the present invention. Referring to fig. 2, the first voltage follower circuit 1021 adopts an OPA350 operational amplifier, a LASER-OUT port of the first voltage follower circuit 1021 can be connected to an output port of the voltage output module 101, and the first analog control voltage output by the voltage output module 101 can be output to the first voltage follower circuit 1021 for voltage regulation. The ADC1-CH6 of the first voltage follower circuit 1021 can be connected to an analog-digital converter ADC built in a microprocessor controller of STM32 series, and the regulated first analog control voltage can be output to the analog-digital conversion circuit 1022 through an ADC1-CH6 port. The analog-digital conversion circuit 1022 may be an analog-digital converter ADC built in a microprocessor controller of STM32 series. Optionally, in order to reduce noise interference in the first analog control voltage, an ACH32C-333-T001 chip may be added to the first voltage follower circuit 1021, and the ACH32C-333-T001 chip may perform a filtering function to filter noise interference in the first analog control voltage.
The embodiment of the utility model provides a laser control system, through the first analog control voltage of voltage output module output, voltage feedback module receives the first analog control voltage of voltage output module output to generate voltage feedback information according to first analog control voltage, make control module rectify according to the voltage feedback information of voltage feedback module output voltage output module output second analog control voltage has solved because there is the instability in the in-process of laser controller at output analog voltage, thereby causes the analog voltage of laser controller output to suddenly rise suddenly low, and then leads to the laser to produce the unstable problem of shining the light beam, realizes controlling the output of laser accurately, thereby can make the laser send suitable laser and shine the light beam, has promoted laser treatment's effect.
Example two
Fig. 3 is a schematic structural diagram of a laser control system according to the second embodiment of the present invention, the embodiment of the present invention is optimized on the basis of the above embodiments, as shown in fig. 3, this laser control system 10 includes: the overvoltage protection circuit comprises a voltage output module 101, a voltage feedback module 102, a control module 103 and an overvoltage protection module 104; wherein:
and the voltage output module 101 is connected to the voltage feedback module 102, and is configured to output a first analog control voltage according to a voltage parameter input by a user, and output the first analog control voltage to the voltage feedback module 102.
The overvoltage protection module 104 is respectively connected with the voltage output module 101 and the voltage feedback module 102, and is used for receiving the first analog control voltage output by the voltage output module 101; when the first analog control voltage meets a preset voltage threshold condition, the first analog control voltage is output to the voltage feedback module 102.
The voltage feedback module 102 is connected with the control module 103 and is used for receiving the first analog control voltage output by the voltage output module 101; voltage feedback information is generated from the first analog control voltage and fed back to the control module 103.
The control module 103 is connected with the voltage output module 101 and used for correcting the voltage output module 101 to output a second analog control voltage according to the voltage feedback information; the first analog control voltage is an analog control voltage output by the voltage output module 101 before correction; the second analog control voltage is an analog control voltage output by the voltage output module 101 after correction.
In this embodiment, there is a certain deviation between the first analog control voltage actually output by the voltage output module 101 and the first analog control voltage theoretically expected to be output according to the voltage parameter input by the user, and especially when such a deviation is large, the first analog control voltage actually output by the voltage output module 101 is too high, which may cause the laser control system to output too high analog control voltage, so as to control the laser connected to the laser control system to output a large-power irradiation beam, thereby accidentally injuring the patient. In order to solve the above problem, an overvoltage protection module 104 may be added between the voltage output module 101 and the voltage feedback module 102, and the voltage output module 101 and the voltage feedback module 102 may be indirectly connected through the overvoltage protection module 104. The output end of the voltage output module 101 is connected with the input end of the overvoltage protection module 104, and can output the first analog control voltage to the overvoltage protection module 104; the output terminal of the overvoltage protection module 104 is connected to the input terminal of the voltage feedback module 103, so that the first analog control voltage can be output to the voltage feedback module 102.
In this embodiment, the overvoltage protection module 104 is configured to receive the first analog control voltage output by the voltage output module 101; when the first analog control voltage satisfies a preset voltage threshold condition, the first analog control voltage may be output to the voltage feedback module 102. The overvoltage protection module 104 is further configured to receive the first analog control voltage output by the voltage output module 101; when the first analog control voltage does not satisfy the preset voltage condition, the overvoltage protection module 104 may disconnect the indirect connection between the voltage output module 101 and the voltage feedback module 102, so that the first analog control voltage output by the voltage output module 101 cannot be input to the voltage feedback module 102 through the overvoltage protection module 104. The overvoltage protection module 104 can play the role of overvoltage protection, and avoids generating too high analog control voltage, so that a laser connected with a laser control system is controlled to output a high-power irradiation beam, and a patient is accidentally injured.
On the basis of the above embodiment, the overvoltage protection module 104 includes: a second voltage follower circuit 1041 and an overvoltage protection circuit 1042; the second voltage follower circuit 1041 is configured to perform voltage stabilization regulation on the first analog control voltage; the overvoltage protection circuit 1042 is configured to output the regulated first analog control voltage to the voltage feedback module 102 when the regulated first analog control voltage meets a preset voltage threshold condition.
In this embodiment, the first analog control voltage output by the voltage output module 101 may have a certain fluctuation, and in order to ensure that the overvoltage protection module 104 receives the stable first analog control voltage, a second voltage follower circuit 1041 may be added to the overvoltage protection module 104. The output end of the voltage output module 101 may be connected to the input end of the second voltage follower circuit 1041, and the second voltage follower circuit 1041 may receive the first analog control voltage output from the output end of the voltage output module 101, and perform voltage stabilization adjustment on the first analog control voltage. The output end of the second voltage follower circuit 1041 is connected to the input end of the overvoltage protection circuit 1042, and the overvoltage protection circuit 1042 can control and protect the regulated first analog control voltage in real time. When the regulated first analog control voltage meets the preset voltage threshold condition, the regulated first analog control voltage may be output to the voltage feedback module 102 through the overvoltage protection circuit 1042. When the first analog control voltage does not satisfy the preset voltage threshold condition, the overvoltage protection circuit 1042 may disconnect the indirect connection between the second voltage follower circuit 1041 and the voltage feedback module 102, so that the first analog control voltage output by the voltage output module 101 cannot be input to the voltage feedback module 102 through the overvoltage protection circuit 1042.
In this embodiment, the second voltage follower circuit 1042 may be an operational amplifier of the OPA350 series; the overvoltage protection circuit 1042 may be a zener diode. Specifically, in the overvoltage protection module 104, whether the first analog control voltage meets a preset voltage threshold condition may be determined by the overvoltage protection circuit 1042. For example, when the overvoltage protection circuit 1042 selects a zener diode, the reverse breakdown voltage of the zener diode can be used as the preset voltage threshold condition. When the first analog control voltage is smaller than the reverse breakdown voltage of the voltage stabilizing diode, the first analog control voltage is considered to meet a preset voltage threshold condition; when the first analog control voltage is greater than the reverse breakdown voltage of the zener diode, the first analog control voltage may be considered to not satisfy the preset voltage threshold condition, and the first analog control voltage needs to be turned off to stop outputting the first analog control voltage to the voltage feedback module 102.
For example, fig. 4 is a circuit diagram of an overvoltage protection module according to an embodiment of the present invention. Referring to fig. 4, the overvoltage protection module includes: a second voltage follower circuit 1041 and an overvoltage protection circuit 1042. The second voltage follower circuit 1041 adopts an OPA350 operational amplifier, an input DACOUT2 port of the second voltage follower circuit 1041 may be connected to an output port of the voltage output module 101, and the first analog control voltage output by the voltage output module 101 may be output to the second voltage follower circuit 1041 for voltage stabilization and regulation. The output port LASER-OUT terminal of the second voltage follower circuit 1041 may be connected to the overvoltage protection circuit 1042, and the output port LASER-OUT terminal of the second voltage follower circuit 1041 is connected to the input terminal of the voltage feedback module 102. For example, the output port LASER-OUT terminal of the second voltage follower circuit 1041 may be connected to the input port LASER-OUT terminal of the first voltage follower circuit 1021 of the voltage feedback module 102, so that the first analog control voltage passing through the overvoltage protection module 104 is transmitted to the voltage feedback module 102. The overvoltage protection circuit 1042 may employ a zener diode D11. Optionally, in order to reduce noise interference in the first analog control voltage, an ACH32C-333-T001 chip may be added to the overvoltage protection module 104, and the ACH32C-333-T001 chip may perform a filtering function to filter noise interference in the first analog control voltage.
On the basis of the above embodiment, the control module 103 may adopt a microcontroller of STM32 series as a main control chip, and since the microcontroller of STM32 series mostly integrates a DAC and an ADC, the DAC of the voltage output module 101 and the ADC in the voltage feedback module 102 may be directly replaced by the microcontroller of STM32 series.
The embodiment of the utility model provides a laser control system, output the first analog control voltage through the voltage output module, the overvoltage protection module carries out protection control to the first analog control voltage output by the voltage output module, simultaneously transmit the first analog control voltage to the voltage feedback module when the first analog control voltage satisfies the voltage threshold condition, the voltage feedback module receives the first analog control voltage and generates voltage feedback information according to the first analog control voltage, so that the control module corrects the voltage output module to output the second analog control voltage according to the voltage feedback information output by the voltage feedback module, thereby solving the problem that the laser generates unstable irradiation light beam due to instability in the process of outputting analog voltage by the laser controller, meanwhile, the output can be cut off when the first analog control voltage is too high, so that the output power of the laser can be accurately controlled, the laser can emit appropriate laser irradiation beams, and the laser treatment effect is improved.
EXAMPLE III
Fig. 5 is the third embodiment of the present invention provides a schematic structural diagram of a laser control system, the embodiment of the present invention is optimized on the basis of the above embodiments, the embodiment of the present invention can be applied to a control device of a laser, as shown in fig. 5, this laser control system 10 can include: the voltage output module 101, the voltage feedback module 102, the control module 103 and the overvoltage protection module 104 may further include an external communication module 105; wherein:
the external communication module 105 is connected with the control module 103 and used for receiving the alarm information sent by the control module 103; the alarm information is information that the first analog control voltage output by the voltage output module 101 is abnormal.
In this embodiment, the first analog control voltage output by the voltage output module 101 may not meet the requirement of the user; when the control module 103 determines that the first analog control voltage cannot meet the requirement of the user according to the voltage feedback information output by the voltage feedback module 102, the voltage output module 101 may be corrected to output the second analog control voltage according to the voltage feedback information. The first analog control voltage is an analog control voltage output by the voltage output module 101 before correction; the second analog control voltage is an analog control voltage output by the voltage output module 101 after correction. Meanwhile, the information that the first analog control voltage is abnormal can be output to the upper computer through the external communication module 105, so that a user can monitor the laser control system in real time on the upper computer.
Exemplarily, fig. 6 is a circuit diagram of an external communication module according to a third embodiment of the present invention. Referring to fig. 6, the external communication module 105 includes: EMI/RFI filters U17 and U18, isolated single channel RS232 line driver/receiver U16, RS232 connector P1, and peripheral circuits. The EMI/RFI filter adopts an ACH32C-333T001 chip. An ADM3251E chip is adopted by an isolated single-channel RS232 line driver/receiver U16, the ADM3251 is used as a data type conversion chip for converting TTL to RS232, and the communication rate is 115200 Hz. The external communication module 105 connects the control module 103 to the upper computer via a serial port for communication. The control module 103 monitors the first analog control voltage output by the voltage output module 101 in real time in an inquiry manner. The auto-regulation voltage output module 101 outputs the second analog control voltage when the first analog control voltage exceeds the setting value ± 10%. When the first analog control voltage output by the voltage output module 101 cannot be automatically adjusted within the range of the safety value, the first analog control voltage is reported to the upper computer in time through the external communication module 105, and the output is cut off. When detecting that the laser connected with the laser control panel 10 has no laser power output, reporting to the upper computer in time and giving an alarm.
On the basis of the above embodiment, the laser control system further includes: the switch module 106 is connected with the control module 103 and used for inputting a command of turning on the laser or turning off the laser to the control module 103; the control module 103 is further configured to output a high level signal to the laser according to an instruction for turning on the laser, so that the laser is controlled to output a laser irradiation beam when receiving the high level signal and the first analog control voltage meet a preset voltage value; and the control circuit is also used for outputting a low level signal to the laser according to an instruction for turning off the laser, so that the laser is controlled to stop outputting the laser irradiation beam when receiving the low level signal or the first analog control voltage does not meet a preset voltage value.
In this embodiment, the laser control system 10 may be connected to an upper computer and a laser, and the upper computer may receive a voltage parameter input by a user, convert the voltage parameter input by the user into a corresponding voltage parameter instruction, and transmit the voltage parameter instruction to the laser control system 10; the laser control system 10 may output a first analog control voltage according to a voltage parameter instruction corresponding to a voltage parameter input by a user, and transmit the first analog control voltage to the laser. In order to avoid the potential safety hazard caused by the fact that the output of the laser is controlled only by the first analog control voltage, a switch module 106 may be added to the laser control system, and the output of the laser is controlled simultaneously by the level signal output by the switch module and the analog control voltage output by the voltage output module 101. Specifically, when the switch module inputs an instruction to turn on the laser to the control module 103, and the control module 103 outputs a high-level signal to the laser according to the instruction to turn on the laser: when the first analog control voltage output by the voltage output module 101 meets the user requirement, the laser may output a laser irradiation beam according to the received high level signal and the first analog control voltage; when the first analog control voltage output by the voltage output module 101 does not meet the user requirement, the laser stops outputting the laser irradiation beam; when the voltage output module 101 outputs the second analog control voltage under the control of the control module 103 and the second analog control voltage meets the user requirement, the laser may output the laser irradiation beam according to the received high level signal and the second analog control voltage. When the switching module inputs an instruction to turn off the laser to the control module 103, and the control module 103 outputs a low level signal to the laser according to the instruction to turn off the laser: no matter the voltage output module outputs the first analog control voltage or the corrected second analog control voltage, the laser stops outputting the laser irradiation beam.
For example, fig. 7 is a circuit diagram of a switch module according to a third embodiment of the present invention. Referring to fig. 7, the switch module 106 includes: EMI/RFI filters, digital isolators, and switching components. The EMI/RFI filter adopts ACH32C-333T001 chip, and the digital isolator adopts ISO7220X chip. An instruction for turning on the laser can be sent to the control module 103 by stepping on the foot switch, so that the control module 103 outputs a high level signal, and the laser is controlled to output a laser irradiation beam by matching with the first analog control voltage or the second analog control voltage output by the voltage output module 101.
In this embodiment, the laser control system may receive an instruction issued by the upper computer, and control the output power, the operating time, and the operating mode of the laser. When the laser works, the output state of the laser is monitored in real time and reported to the upper computer, and meanwhile, the output power of the laser can be automatically adjusted, and the laser is automatically turned off and alarmed to the upper computer after the power exceeds a safety threshold. Optionally, the first analog control voltage or the second analog control voltage output by the voltage output module may be a continuously output analog control voltage or an intermittently output analog control voltage.
On the basis of the above embodiment, the laser control system may further include: and the power feedback module can enable the laser control system to be connected with the output end of the laser through the power feedback module, is used for collecting the output power of the laser and feeding the output power of the laser back to the control module 103 of the laser control system. At this time, the control module 103 may cooperate with the correction voltage output module 101 to output the second analog control voltage according to the laser washing output power fed back by the power feedback module and the voltage feedback information fed back by the voltage feedback module. The scheme considers the change condition of the analog control voltage output by the laser control panel and also considers the condition that the output power of the laser changes along with the environment, and the output power of the laser is adjusted simultaneously by matching the two factors. The laser control system can be applied to laser emitting equipment, such as semiconductor laser therapeutic equipment and the like. Optionally, the laser control system may further include a timing module, configured to control a duration of the laser irradiation beam output by the laser.
The embodiment of the utility model provides a laser control system, through the first analog control voltage of voltage output module output, voltage feedback module receives the first analog control voltage of voltage output module output to generate voltage feedback information according to first analog control voltage, make control module rectify according to the voltage feedback information of voltage feedback module output voltage output module output second analog control voltage has solved because there is the instability in the in-process of laser controller at output analog voltage, thereby causes the analog voltage of laser controller output to suddenly rise suddenly low, and then leads to the laser to produce the unstable problem of shining the light beam, realizes controlling the output of laser accurately, thereby can make the laser send suitable laser and shine the light beam, has promoted laser treatment's effect.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A laser control system, the system comprising: the voltage feedback control system comprises a voltage output module, a voltage feedback module and a control module; wherein,
the voltage output module is connected with the voltage feedback module and used for outputting a first analog control voltage according to a voltage parameter input by a user and outputting the first analog control voltage to the voltage feedback module;
the voltage feedback module is connected with the control module and used for receiving the first analog control voltage output by the voltage output module; generating voltage feedback information according to the first analog control voltage, and feeding the voltage feedback information back to the control module; the voltage feedback information comprises a voltage value of a first analog control voltage;
the control module is connected with the voltage output module and used for correcting the voltage output module to output a second analog control voltage according to the voltage feedback information; the first analog control voltage is an analog control voltage output by the voltage output module before correction; the second analog control voltage is the analog control voltage output by the voltage output module after correction.
2. The system of claim 1, wherein the voltage output module is a digital-to-analog converter (DAC) built in a microprocessor controller of the STM32 series.
3. The system of claim 1, wherein the voltage feedback module comprises: the circuit comprises a first voltage follower circuit and an analog-digital conversion circuit; wherein,
the first voltage follower circuit is used for receiving the first analog control voltage and carrying out voltage stabilization regulation on the first analog control voltage;
the analog-digital conversion circuit is used for converting the first analog control voltage after voltage stabilization regulation into a corresponding digital feedback signal and feeding the digital feedback signal back to the control module.
4. The system of claim 3, wherein the first voltage follower circuit is an OPA350 series operational amplifier; the analog-digital conversion circuit is an analog-digital converter ADC built in a microprocessor controller of STM32 series.
5. The system of claim 1, further comprising:
the overvoltage protection module is respectively connected with the voltage output module and the voltage feedback module and is used for receiving the first analog control voltage output by the voltage output module; and when the first analog control voltage meets a preset voltage threshold condition, outputting the first analog control voltage to the voltage feedback module.
6. The system of claim 5, wherein the overvoltage protection module comprises: the second voltage follower circuit and the overvoltage protection circuit; wherein,
the second voltage follower circuit is used for carrying out voltage stabilization regulation on the first analog control voltage;
the overvoltage protection circuit is used for outputting the regulated first analog control voltage to the voltage feedback module when the regulated first analog control voltage meets a preset voltage threshold condition.
7. The system of claim 6, wherein the second voltage follower circuit is an OPA350 series operational amplifier; the overvoltage protection circuit is a voltage stabilizing diode.
8. The system of claim 1, further comprising: the external communication module is connected with the control module and used for receiving the alarm information sent by the control module; the alarm information is the information that the first analog control voltage output by the voltage output module is abnormal.
9. The system of claim 1, further comprising: the switch module is connected with the control module and used for inputting an instruction for turning on the laser or an instruction for turning off the laser to the control module;
the control module is further used for outputting a high level signal to the laser according to the instruction for turning on the laser, so that the laser is controlled to output a laser irradiation beam when receiving the high level signal and the first analog control voltage meet a preset voltage value; and the control circuit is also used for outputting a low level signal to the laser according to the instruction for turning off the laser, so that the laser is controlled to stop outputting the laser irradiation beam when receiving the low level signal or the first analog control voltage does not meet a preset voltage value.
10. The system of claim 1, wherein the first analog control voltage or the second analog control voltage is a continuously output analog control voltage or an intermittently output analog control voltage.
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| CN112445168A (en) * | 2020-11-27 | 2021-03-05 | 南京亿高微波***工程有限公司 | Power correction system and method for semiconductor laser therapeutic instrument |
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| CN112445168A (en) * | 2020-11-27 | 2021-03-05 | 南京亿高微波***工程有限公司 | Power correction system and method for semiconductor laser therapeutic instrument |
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