CN102157893B - Medical laser power control module based on complex programmable logic device (CPLD) - Google Patents

Medical laser power control module based on complex programmable logic device (CPLD) Download PDF

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CN102157893B
CN102157893B CN 201110034856 CN201110034856A CN102157893B CN 102157893 B CN102157893 B CN 102157893B CN 201110034856 CN201110034856 CN 201110034856 CN 201110034856 A CN201110034856 A CN 201110034856A CN 102157893 B CN102157893 B CN 102157893B
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chip
cpld
potentiometer
module
digital
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CN 201110034856
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CN102157893A (en )
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苏振宇
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浪潮电子信息产业股份有限公司
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Abstract

本发明提供一种基于CPLD的医疗激光器功率控制模块,硬件包括:CPLD芯片、4×4键盘、液晶显示模块LCD、数字温度计芯片、数字电位器芯片、报警指示灯LED和12MHz晶振;CPLD芯片是整个模块的核心控制部件,由它控制其他部件的运行,该芯片是基于乘积项结构的PLD,特别适用于实现高速复杂的组合、时序逻辑。 The present invention provides a medical CPLD-based laser power control module, the hardware comprising: a chip CPLD, 4 × 4 keypad, a liquid crystal display module LCD, digital thermometer chip, chip digital potentiometer, 12MHz crystal and LED alarm indicator; chip CPLD the core of the module control means, operation of which controls the other components, the chip is based on the structure of the PLD product terms, especially for complex combinations of high-speed, sequential logic. 通过控制LCD、键盘组成的人机交互接口来实现调节数字电位器的输出电阻值,从而达到改变激光器发射功率等级的目的;同时还实现了检测激光器所处的环境温度、高温报警以及定时控制等功能。 By controlling the LCD, the keyboard consisting of human-computer interaction interface to achieve the output resistance of the digital potentiometer is adjusted, so as to achieve the purpose of changing the transmit power level of the laser; while also enabling detection of the laser where the ambient temperature, high temperature alarm and a timing control Features.

Description

—种基于CPLD的医疗激光器功率控制模块 - kind of CPLD-based medical laser power control module

技术领域 FIELD

[0001] 本发明涉及一种医疗激光器控制技术或电子信息领域,主要是应用于医疗行业的一种基于CPLD的医疗激光器功率控制模块。 [0001] The present invention relates to a medical laser, or the field of electronic control information is mainly used in the medical industry is a module based on the control of the medical laser power CPLD.

背景技术 Background technique

[0002] 众所周知,激光具有方向性好、亮度极高、单色性好、相干性好等优点,因此激光器在军事、加工、医疗和科学研究领域有广泛的用途。 [0002] As we all know, the laser has a good direction, high brightness, good color, coherence and good, so lasers have wide applications in the military, processing, medical and scientific research. 目前固体激光器是使用比较广泛的一种激光器,具有输出能量大,峰值功率高,结构紧凑耐用的优点。 Solid-state laser is currently used widely as a laser having an output energy, high peak power, compact and durable construction advantages. 当前固体激光器在医疗与美容方面的应用是非常广泛的,例如在医学上常用激光器来做手术刀,应用于普外科、耳鼻喉科、泌尿科、骨科和整形科等。 Current solid-state laser applications in medical and beauty area is very broad, such as lasers used in medicine to do a scalpel, used in general surgery, otolaryngology, urology, orthopedics and plastic surgery and so on. 利用激光切割血管丰富的组织,可以大大减少出血,由于激光脉冲能量大,不易被水和血红蛋白吸收,故穿透组织较深。 By laser cutting rich vascular tissue, bleeding can be greatly reduced, since the laser pulse energy is large, easily absorbed by water and hemoglobin, it penetrates deeper tissue.

[0003] 但是固体激光器也有缺点:温度效益比较严重,发热量大。 [0003] However, solid-state laser also has disadvantages: a temperature of more serious efficiency, heat. 正是由于输出能量大,峰值功率高,导致热效应非常明显,因此不得不配置冷却系统才能保证固体激光器的正常连续使用。 It is because the output energy, high peak power, thermal effects resulting in very clear, had to configure the system to ensure proper cooling of the solid-state laser of continuous use. 本发明可以有效的弥补这些不足,通过CPLD控制一个可编程的数字电位器来代替现有的固体激光器电源内部的可调电阻,实现激光器功率的精确调整;同时通过温度的设定控制激光器的温度,避免了大的发热量和功耗。 The present invention can effectively compensate for these shortcomings, instead of the conventional solid laser power inside the adjustable resistors, accurate adjustment of the laser power by controlling a CPLD programmable digital potentiometer; simultaneously controlled by setting the temperature of the laser temperature to avoid the large amount of heat and power. 从而有效保证了患者的安全。 So as to effectively ensure the safety of patients.

发明内容 SUMMARY

[0004] 本发明的目的是提供一种基于CPLD的医疗激光器功率控制模块。 [0004] The object of the present invention is to provide a CPLD-based medical laser power control module.

[0005] 通过本发明的激光器功率的精确调节,保证患者不会由于激光器的输出功率过高而被灼伤。 [0005] By accurately adjusting the laser power of the present invention, to ensure that the patient is not too high since the output power of the laser and burns. 核心是利用CPLD的可编程技术,实现对激光器功率的调节和实时显示激光器的温度。 The core is the use of programmable CPLD technology, adjustment of the temperature of the laser and the laser power in real time.

[0006] 本发明的目的是按以下方式实现的,硬件包括:CPLD芯片、4X4键盘、液晶显示模块LCD、数字温度计芯片、数字电位器芯片、报警指示灯LED和12MHz晶振;其中: [0006] The object of the present invention are achieved in the following manner, the hardware comprising: CPLD, chip, 4X4 keyboard, a liquid crystal display module LCD, digital thermometer chip, chip digital potentiometer, 12MHz crystal and LED alarm indicator; wherein:

[0007] CPLD芯片,用于控制模块上各部件的工作;CPLD芯片的型号是EPM7064SLC44-10 ; [0007] CPLD chip, the work of the means for controlling the member; CPLD, chip model is EPM7064SLC44-10;

[0008] 1)4X4键盘连接到CPLD芯片,作为整个发明的核心,用于控制模块上各部件的工作;CPLD芯片的9根I/O线,利用CPLD芯片的可编程技术实现4X4的扫描键盘功能; [0008] 1) 4X4 keyboard to the CPLD chip as the core of the invention, the components for the working of the control module; 9 CPLD chip I / O lines, using technology CPLD chip programmable keyboard scan of 4X4 Features;

[0009] 2)液晶显示模块IXD,连接到CPLD芯片的11根I/O线上,通过编程、译码实现各种参数的显示,液晶显示模块的型号是LCM1602 [0009] 2) IXD liquid crystal display module, 11 is connected to the I / O line CPLD chip, programmed to achieve a variety of parameters, decoded and displayed, the liquid crystal display module model is LCM1602

[0010] 3) 12MHz晶振占用I根CPLD芯片的I/O线,作为模块的时钟输入; [0010] 3) 12MHz crystal occupies I root CPLD chip I / O lines, as an input clock module;

[0011] 4)报警指示灯LED,占用I根CPLD芯片的I/O线,用于模块的报警; [0011] 4) the LED alarm indicator, I take up the root CPLD chip I / O line, for the alarm module;

[0012] 5)数字温度计芯片,占用I根CPLD芯片的I/O线,实现温度的采集,数字温度计的型号是DS1820 ; [0012] 5) digital thermometer chip, I take up the root CPLD chip I / O line, and collect temperature, digital thermometer model is DS1820;

[0013] 6)数字电位器芯片,连接3根CPLD芯片的I/O线,实现CPLD芯片对电位器的调整,数字电位器的型号是DS1867 ; [0013] 6) digital potentiometer chip, I / O lines, the CPLD chip CPLD chip 3 is connected to the adjustment potentiometer is a digital potentiometer DS1867 model;

[0014] 控制模块的运行流程如下:[0015] I)模块复位:整个模块进行上电复位,此时报警指示灯LED处于灭的状态,液晶显示模块LCD处于不显示状态; [0014] operational flow control module are as follows: [0015] I) Module Reset: reset the entire module, in this case the alarm indicator LED OFF state, the liquid crystal display LCD module in a non-display state;

[0016] 2)设置定时参数:通过CPLD芯片编程实现定时参数的设置,设置数字温度计芯片的循环显示时间为I秒,数字电位器芯片的定时时间为I分钟,此时液晶显示模块LCD会显示此定时时间; [0016] 2) Set timing parameters: the timing parameter setting, digital thermometer chip set display time of I second cycle, the digital potentiometer chip timer time is I min, and the LCD display module LCD displays is achieved by programming the CPLD this regular time;

[0017] 3)功率控制部分:通过对数字电位器芯片的控制达到对激光器功率控制;对数字电位器芯片的输出控制是通过串行传递一个17比特的数据包来实现的,bitO是电位器输出选择位,O、I分别选择电位器O、电位器I,然后是Sbit电位器I控制字和8位电位器O控制字,分别对应两个点位器0-255的输出等级控制,采用了电位器0,通过键盘输入来传送数据包,从而控制电位器O的输出等级,同时CPLD芯片通过编程译码在液晶显示模块LCD上以B⑶码形式显示输出等级0-255 ; [0017] 3) a power control section: the digital potentiometer by the control chip to achieve the laser power control; control of the digital potentiometer output chip is a 17 bit data transfer packets through a serial achieved, bitO potentiometers output select, O, O I were selected potentiometer, the potentiometer I, then I Sbit potentiometer control word and eight potentiometers O control word, two points respectively corresponding to the output level control 0-255, using potentiometer to 0, the packet is transmitted through the keyboard to control the output level of the potentiometer O, while the CPLD programming decoded and displayed by the liquid crystal display LCD module 0-255 to B⑶ output level code form;

[0018] 4)温度设置与采集:对数字温度计芯片进行复位与初始化参数的工作在设置电位器等级之前进行,通过键盘输入的方式设定温度值的下限和上限,液晶显示模块LCD显示温度的BCD码,当设置完电位器的输出阻值后,进行激光器所处环境的温度采集与读取工作,这时CPLD芯片再通过键盘向数字温度计芯片相继发送温度转换与读取内部寄存器的命令,读取的温度每隔I秒钟会显示在液晶显示模块LCD上,当温度超出所设置的范围时,CPLD芯片将点亮报警LED,以指示操作人员应降低激光器的功率,当重新设定数字电位器的输出电阻后,再进行温度的采集与显示,当总的定时时间到达时,CPLD芯片对数字电位器复位,从而结束了本次操作。 [0018] 4) collection and temperature settings: a digital thermometer chip reset initialization parameters before work potentiometer setting level, set by means of the keyboard input of the lower and upper temperature value, the temperature of the liquid crystal display of the LCD display module BCD, when the output resistance after setting potentiometer, acquisition and temperature environment in which the laser read operation, then CPLD chip temperature conversion and retransmission command register to read internal digital thermometer chips sequentially through a keyboard, reading the temperature every second I displayed on the liquid crystal display module is LCD, when the temperature exceeds the set range, CPLD alarm lights the LED chip, to indicate that the operator should reduce the power of the laser, when the digital reset after the output resistance of the potentiometer, and then the temperature acquisition and display, when the total time reaches a timing, CPLD digital potentiometer chip reset, thus ending this operation.

[0019] 本发明的有益效果,是以CPLD为核心,通过控制IXD、键盘组成的人机交互接口来实现调节数字电位器的输出电阻值,从而达到改变激光器发射功率等级的目的;同时还实现了检测激光器所处的环境温度、高温报警以及定时控制等功能。 [0019] Advantageous effects of the present invention, the core is CPLD, by controlling IXD, keyboard consisting of human-computer interaction interface to achieve the output resistance of the digital potentiometer is adjusted, so as to achieve the purpose of changing the transmit power level of the laser; while still achieving detecting the laser where the ambient temperature, high temperature alarm and a timing control functions.

附图说明 BRIEF DESCRIPTION

[0020] 图1是医疗激光器功率控制模块的组成图。 [0020] FIG. 1 is a schematic diagram showing a medical laser power control module.

[0021] 图2是医疗激光器功率控制模块的工作流程图。 [0021] FIG 2 is a flowchart of a medical laser power control module.

具体实施方式 Detailed ways

[0022] 参照说明书附图对本发明的模块作以下详细地说明。 [0022] Referring to the module of the present invention will be described below in detail with accompanying drawings.

[0023] 本发明的模块主要包括以下几部分: [0023] module of the present invention mainly comprises the following parts:

[0024] CPLD芯片:是整个模块的核心控制部件,由它控制其他部件的运行。 [0024] CPLD chip: the control member is the core of the entire module, operation of which controls the other components. 本发明采用的CPLD型号是美国Altera公司MAX7000S系列44引脚的EPM7064SLC44-10。 The present invention employs a CPLD Altera Corporation is the US model series MAX7000S 44-pin EPM7064SLC44-10. 该芯片是基于乘积项结构的PLD,特别适用于实现高速复杂的组合、时序逻辑。 The chip is based on the product term PLD structures, particularly suitable for implementing a high speed complex combination of sequential logic. EPM7064SLC44-10的器件门数为2500,宏单元为64个,逻辑阵列块为4个,I/O引脚数为36个。 EPM7064SLC44-10 door device number is 2500, macro cell 64, four logic array blocks, I / O pin number is 36. 以上资源完全可以满足模块的设计需求。 More resources can meet the design requirements of the module.

[0025] 液晶显示模块:模块的显示界面采用LCM1602,2行16字符的液晶显示模块,用以显示功率等级,定时参数以及温度变化等参数。 [0025] The liquid crystal display modules: a liquid crystal display interface module LCM1602,2 line by 16 character display module, the parameter the power level, timing parameters, and to display the temperature change.

[0026] 键盘输入部分:用户输入采用典型的4X4行列式扫描键盘,配合IXD和用户之间进行交互。 [0026] Keyboard input portion: a user input using a typical scan determinant 4X4 keyboard, with the interaction between the user and IXD. [0027] 数字电位器芯片:本发明实现的功率控制功能通过调节该可编程的数字电位器来替代专用电源内部的可调电阻,实现改变激光器的功率。 [0027] The digital potentiometer chip: a power control function of the present invention is implemented to replace the dedicated internal power supply adjustable resistance by adjusting the programmable digital potentiometer, effect a change in power of the laser. DS1867芯片是美国DALLAS公司出品的,它包含两个256等级输出的电位器,电阻可调范围是O〜IOk Ω,通过串行方式进行编程,占用的I/O 口少。 DALLAS DS1867 chip American company produced, which comprises two potentiometer 256 output levels, the resistance is adjustable range O~IOk Ω, programmed through the serial mode, taking an I / O port less. 内含EEPR0M,电位器设置在掉电后能自动保护。 Containing EEPR0M, potentiometer setting protection automatically after a power failure.

[0028] 数字温度计芯片:DS1820芯片是一种温度采集器件,也是美国DALLAS公司出品的,它采用了Ι-wire总线接口技术,测试温度范围是-55 °C _+125°C,精度可达0.0675 °C,最大转换时间为200ms。 [0028] Digital Thermometer chip: DS1820 chip is a temperature acquisition device is produced DALLAS, USA, which uses Ι-wire bus interface, test temperature range is -55 ° C _ + 125 ° C, accuracy of up to 0.0675 ° C, the maximum conversion time is 200ms. 该芯片的封装仅有3个引脚,其中只需要通过一个引脚即可完成双向数据传输。 The chip package of only three pins, wherein only need to complete the bidirectional data transmission via a pin.

[0029] 报警指示灯LED:采用一只发光二极管作为报警指示灯,当检测到激光器的温度超出设定的范围时,点亮发光二极管。 [0029] warning indicator LED: light emitting diode is employed as a warning indicator, the laser when the detected temperature exceeds the set range, the lighting light emitting diode.

[0030] 晶体振荡器:采用一个12MHz的有源晶体振荡器作为整个模块的时钟,整个模块的运转在该时钟的控制下有序进行。 [0030] Crystal Oscillator: using a 12MHz crystal oscillator is active as a clock of the entire module, orderly operation of the entire module under the control of the clock.

[0031] 实施例 [0031] Example

[0032] 如附图1所示,本发明一种基于CPLD的医疗激光器功率控制模块,包括:CPLDEPM7064SLC44-10芯片、4X 4键盘、LCD显示、数字温度计DS1820芯片、数字电位器DS1867芯片、报警指示灯和12MHz晶振。 [0032] As shown in Figure 1, the present invention is based on CPLD medical laser power control module, comprising: CPLDEPM7064SLC44-10 chip, 4X 4 keyboard, LCD display, digital thermometer DS1820 chip, digital potentiometer DS1867 chip, alarm indication 12MHz crystal and the lamp.

[0033] 该模块各个部件的连接关系为: [0033] The connection relationship of the various components of the module:

[0034] 1.4X4键盘连接到CPLD的9根I/O线,利用CPLD的可编程技术实现4X4的扫描键盘功能;2.LCM1602连接到CPLD的11根I/O线上,通过编程、译码实现各种参数的显示; [0034] 1.4X4 keyboard 9 is connected to the CPLD I / O lines, using CPLD technology programmable keyboard scan function is 4X4; 2.LCM1602 the CPLD 11 is connected to the I / O lines, by programming the decoder realize the display of various parameters;

[0035] 3.12MHz晶振占用I根CPLD的I/O线,作为模块的时钟输入; [0035] 3.12MHz occupied I crystal CPLD root of I / O lines, as an input clock module;

[0036] 4.报警指示灯占用I根CPLD的I/O线,用于模块的报警; [0036] 4. The warning indicator of occupancy I root CPLD I / O lines, the alarm for the module;

[0037] 5.数字温度计DS1820占用I根CPLD的I/O线,实现温度的采集; [0037] The digital thermometer DS1820 occupied I CPLD root of I / O lines, realize the collection of the temperature;

[0038] 6.数字电位器DS1867连接3根CPLD的I/O线,实现CPLD对电位器的调整。 [0038] 6. The DS1867 digital potentiometer connected to the CPLD 3 I / O lines, the CPLD adjustment of the potentiometer.

[0039] 本发明的运行流程如附图2所示, [0039] The operational flow of the present invention as shown in figures 2,

[0040] 1.模块复位:整个模块进行上电复位,此时报警指示灯处于灭的状态,IXD处于不显示状态。 [0040] 1. Module Reset: reset the entire module, when the alarm indicator is off state, IXD in a non-display state.

[0041] 2.设置定时参数:通过CPLD编程实现定时参数的设置,例如设置温度的循环显示时间为I秒,电位器的定时时间为I分钟。 [0041] 2. Set the timing parameters: setting timing parameters to achieve CPLD programming by, for example, the set temperature display cycle time is I sec, regular time potentiometer for I min. 此时LCD会显示此定时时间。 The LCD displays this regular time.

[0042] 3.功率控制部分:通过对数字电位器DS1867的控制达到对激光器功率控制。 [0042] 3. The power control portion: by controlling the digital potentiometer DS1867 reaches the laser power control. 对DS1867的输出控制是通过串行传递一个17比特的数据包来实现的。 The output control of the DS1867 is a 17-bit data transfer packets through a serial achieved. bitO是电位器输出选择位,O、I分别选择电位器O、电位器I,然后是Sbit电位器I控制字和8位电位器O控制字,分别对应两个点位器的输出等级(0-255)。 bitO potentiometers Output Select, O, O I were selected potentiometer, the potentiometer I, then I Sbit potentiometer control word and eight potentiometers O control word, two points respectively corresponding to the output level (0 -255). 本发明实际采用了电位器0,通过键盘输入来传送数据包,从而控制电位器O的输出等级,同时CPLD通过编程译码在IXD上以B⑶码形式显示输出等级(0-255)。 The present invention is actually used a potentiometer 0, the packet is transmitted through the keyboard to control the output level of the potentiometer O, while the output level display CPLD (0-255) in the form of programmed code decoding B⑶ on IXD. 例如:当电位器O的控制字输入10110100时,在IXD上显示的对应等级是“180”,此时的电位器输出阻值为IOkQ X (180/256) = 7.03k Ω。 For example: when the potential of the input control word is O 10110100, the corresponding level is displayed on IXD "180", then the resistance value of the potentiometer output IOkQ X (180/256) = 7.03k Ω.

[0043] 4.温度设置与采集:如附图2,对温度芯片DS1820进行复位与初始化参数的工作在设置电位器等级之前进行,通过键盘输入的方式设定温度值的下限和上限,LCD显示温度的BCD码。 [0043] 4. Set the temperature collection: 2 as reference, the temperature of the working chip DS1820 reset initialization parameters level before setting potentiometer for setting an upper limit and a lower limit temperature value by means of the keyboard, LCD display temperature BCD code. 当设置完电位器的输出阻值后,进行激光器所处环境的温度采集与读取工作,这时CPLD再通过键盘向DS1820相继发送温度转换与读取内部寄存器的命令即可。 After setting when the output of the potentiometer resistance, temperature acquisition and the environment in which the laser read operation, then CPLD retransmission temperature conversion command to read internal registers of the keyboard can have DS1820. 读取的温度每隔I秒钟会显示在LCD上,当温度超出所设置的范围时CPLD将点亮报警LED,以指示操作人员应降低激光器的功率,当重新设定数字电位器的输出电阻后,再进行温度的采集与显示。 Reading the temperature every second I displayed on the LCD, when the temperature exceeds the set range CPLD warning will illuminate the LED, to indicate that the operator should reduce the power of the laser, when the reset output resistance of the digital potentiometer carried out after the temperature acquisition and display. 当总的定时时间到达时,CPLD对数字电位器复位,从而结束了本次操作。 When the total time reaches a timing, CPLD digital potentiometer reset, thus ending this operation.

Claims (1)

1.一种基于CPLD的医疗激光器功率控制模块,其特征在于,硬件包括:0?0)芯片、4\4键盘、液晶显示模块IXD、数字温度计芯片、数字电位器芯片、报警指示灯LED和12MHz晶振;其中: CPLD芯片,用于控制模块的工作;CPLD芯片的型号是EPM7064SLC44-10 ; 1)4X4键盘连接到CPLD芯片,作为整个发明的核心,用于控制模块的工作;CPLD芯片的9根I/O线,利用CPLD芯片的可编程技术实现4X4的扫描键盘功能; 2)液晶显示模块IXD,连接到CPLD芯片的11根I/O线上,通过编程、译码实现各种参数的显示,液晶显示模块的型号是LCM1602 ; 3) 12MHz晶振占用I根CPLD芯片的I/O线,作为模块的时钟输入; 4)报警指示灯LED,占用I根CPLD芯片的I/O线,用于模块的报警; 5)数字温度计芯片,占用I根CPLD芯片的I/O线,实现温度的采集,数字温度计的型号是DS1820 ; 6)数字电位器芯片,连接3根CPLD芯片的I/O线,实现C A CPLD-based medical laser power control module, characterized in that, the hardware comprising:? 00) chip, 4 \ 4 a keyboard, a liquid crystal display module IXD, digital thermometer chip, chip digital potentiometer, and LED alarm indicator 12MHz crystal; wherein: CPLD chip, for controlling the operation of the module; CPLD chip model is EPM7064SLC44-10; 1) 4X4 keyboard to the CPLD chip as the core of the invention, for operating a control module; CPLD chip 9 root I / O lines, using technology CPLD chip programmable keyboard scan function of 4X4; 2) IXD liquid crystal display module, 11 is connected to the I / O line CPLD chip, programmed to implement various coding parameters display, liquid crystal display module model is LCM1602; 3) 12MHz crystal occupies I root CPLD chip I / O line, as the clock input module; 4) the LED alarm indicator, I take up the root CPLD chip I / O line, with in the alarm module; 5) digital thermometer chip, occupied I root CPLD chip I / O line, and collect temperature, digital thermometer model is DS1820;. 6) digital potentiometer chip, connecting three CPLD chip I / O line, and C PLD芯片对电位器的调整,数字电位器的型号是DS1867 ; 控制模块的运行流程如下: 1)模块复位:整个模块进行上电复位,此时报警指示灯LED处于灭的状态,液晶显示模块IXD处于不显示状态; 2)设置定时参数:通过CPLD芯片编程实现定时参数的设置,设置数字温度计芯片的循环显示时间为I秒,数字电位器芯片的定时时间为I分钟,此时液晶显示模块LCD会显示此定时时间; 3)功率控制部分:通过对数字电位器芯片的控制达到对激光器功率控制;对数字电位器芯片的输出控制是通过串行传递一个17比特的数据包来实现的,bitO是电位器输出选择位,O、I分别选择电位器O、电位器1,然后是Sbit电位器I控制字和8位电位器O控制字,分别对应两个电位器0-255的输出等级控制,采用了电位器0,通过键盘输入来传送数据包,从而控制电位器O的输出等级,同时CPLD芯片通过编程译 PLD chip adjustment potentiometer is a digital potentiometer type DS1867; control module operating process is as follows: 1) Module Reset: reset the whole module, then the warning indicator LED is OFF state, the liquid crystal display module IXD in a non-display state; 2) timing parameter setting: setting the timing loop parameters, digital thermometer chip set display time is I sec, the digital potentiometer chip timer time is I min achieved by programming the CPLD, when the liquid crystal display LCD module this timer time displayed; 3) power control portion: by controlling the digital potentiometer chip reaches the laser power control; control of the digital potentiometer output chip is a 17 bit data transfer packets through a serial achieved, bitO output select is a potentiometer, O, O I were selected potentiometer, the potentiometer 1, and I is the control word Sbit potentiometer and the potentiometer 8 O control word respectively correspond to the output level control two potentiometers 0-255 , using potentiometers 0, the packet is transmitted through the keyboard to control the output level of the potentiometer O, while the chip by programming the CPLD translation 码在液晶显示模块LCD上以B⑶码形式显示输出等级0-255 ; 4)温度设置与采集:对数字温度计芯片进行复位与初始化参数的工作在设置电位器等级之前进行,通过键盘输入的方式设定温度值的下限和上限,液晶显示模块LCD显示温度的BCD码,当设置完电位器的输出阻值后,进行激光器所处环境的温度采集与读取工作,这时CPLD芯片再通过键盘向数字温度计芯片相继发送温度转换与读取内部寄存器的命令,读取的温度每隔I秒钟会显示在液晶显示模块LCD上,当温度超出所设置的范围时,CPLD芯片将点亮报警LED,以指示操作人员应降低激光器的功率,当重新设定数字电位器的输出电阻后,再进行温度的采集与显示,当总的定时时间到达时,CPLD芯片对数字电位器复位,从而结束了本次操作。 Code on the liquid crystal display LCD display module code in the form of an output level B⑶ 0-255; 4) is provided with a collection temperature: digital thermometer chip reset initialization parameters before work potentiometer setting level, provided by way of keyboard predetermined lower and upper temperature values, the temperature of the liquid crystal display LCD display module BCD code, when the output resistance after setting potentiometer, acquisition and temperature environment in which the laser read operation, this time through the keyboard to the CPLD sequentially transmitting chip digital thermometer with temperature conversion command to read internal registers, temperature readings every second I displayed on the liquid crystal display module is LCD, when the temperature exceeds the set range, CPLD alarm lights the LED chip, to indicate that the operator should reduce the power of the laser, when the reset output resistance of the digital potentiometer, and then the temperature acquisition and display, when the total time reaches a timing, CPLD digital potentiometer chip reset, thereby ending the present operations.
CN 201110034856 2011-02-09 2011-02-09 Medical laser power control module based on complex programmable logic device (CPLD) CN102157893B (en)

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