CN207752677U - A kind of waveform generates and translation circuit experimental provision - Google Patents
A kind of waveform generates and translation circuit experimental provision Download PDFInfo
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Abstract
本实用新型涉及波形产生和变换电路实验装置，属于模拟电子技术领域。本实用新型包括正弦波发生器、矩形波变换电路和三角波变换电路；还包括25个测试端；本实用新型根据电路原理图设计制作PCB板，并在相应位置留出测试端，学生可以根据电路原理图用导线将测试端连接起来，并在相应位置接入双通示波器观察实验中波形的变化情况。本实用新型通过解决学生在自己搭建波形产生和变换电路时，由于焊接、布局经验不足而导致所搭建的电路失败，不能在规定课时内完成实验任务，从而影响教学进度等教学事故的发生，学生能够在规定课时内根据实验原理图在实验板上完成实验，且锻炼了学生的动手能力和元器件识别的能力，从而提高了教学质量和教学进度。
The utility model relates to a waveform generating and transforming circuit experimental device, which belongs to the technical field of analog electronics. The utility model includes a sine wave generator, a rectangular wave conversion circuit and a triangular wave conversion circuit; it also includes 25 test terminals; the utility model designs and manufactures a PCB board according to the circuit principle diagram, and leaves a test terminal at the corresponding position, and students can The schematic diagram connects the test terminals with wires, and connects a dual-pass oscilloscope at the corresponding position to observe the waveform changes in the experiment. The utility model solves the problem of teaching accidents such as the failure of the circuit built by the students due to insufficient experience in welding and layout when they build the waveform generation and conversion circuit, and the inability to complete the experimental task within the prescribed class hours, thereby affecting the teaching progress. The experiment can be completed on the experimental board according to the experimental schematic diagram within the prescribed class hours, and the students' hands-on ability and component identification ability have been trained, thereby improving the teaching quality and teaching progress.
Description
技术领域technical field
本实用新型涉及一种波形产生和变换电路实验装置，属于模拟电子技术领域。The utility model relates to an experimental device for waveform generating and transforming circuits, which belongs to the technical field of analog electronics.
背景技术Background technique
目前，正弦波、方波、三角波被广泛地应用于遥控、通讯、自动控制等加工设备之中，同时也作为模拟电子电路的测试信号和控制信号；在模拟电子实验室，通过函数发生器产生所需频率的波形信号给测试电路使用，学生能够通过示波器观察到波形信号，但是对其产生和变换的原理认识不清晰，且函数发生器体积大、质量重，不方便移动和携带。At present, sine waves, square waves, and triangle waves are widely used in processing equipment such as remote control, communication, and automatic control. They are also used as test signals and control signals for analog electronic circuits; The waveform signal of the required frequency is used for the test circuit. Students can observe the waveform signal through the oscilloscope, but they do not have a clear understanding of the principle of its generation and transformation, and the function generator is large in size and heavy in weight, which is inconvenient to move and carry.
发明内容Contents of the invention
本实用新型要解决的技术问题是：本实用新型提供一种波形产生和变换电路实验装置，解决学生在自己搭建波形产生和变换电路时，由于焊接、布局经验不足而导致所搭建的电路失败，不能在规定课时内完成实验任务，从而影响教学进度等教学事故的发生。The technical problem to be solved by the utility model is: the utility model provides an experimental device for waveform generation and conversion circuit, which solves the problem that the circuit built by students fails due to insufficient experience in welding and layout when they build the waveform generation and conversion circuit by themselves. Teaching accidents such as failure to complete the experimental tasks within the prescribed class hours, thereby affecting the teaching progress.
本实用新型技术方案是：一种波形产生和变换电路实验装置，包括正弦波发生器1、矩形波变换电路2和三角波变换电路3；还包括25个测试端；The technical scheme of the utility model is: a waveform generation and conversion circuit experimental device, including a sine wave generator 1, a rectangular wave conversion circuit 2 and a triangular wave conversion circuit 3; also includes 25 test terminals;
所述正弦波发生器1包括运算放大器A1、电位器Rw、电阻R1、R2、R3、R4、R5、电容C1、C2、二极管D1、D2；The sine wave generator 1 includes an operational amplifier A1, a potentiometer Rw, resistors R1, R2, R3, R4, R5, capacitors C1, C2, diodes D1, D2;
所述矩形波变换电路2包括运算放大器A2、电阻R6、R7；The rectangular wave conversion circuit 2 includes an operational amplifier A2, resistors R6, R7;
所述三角波变换电路3包括运算放大器A3、电阻R8、R9、R10、R11、电容C3、二极管D3、D4；The triangular wave conversion circuit 3 includes an operational amplifier A3, resistors R8, R9, R10, R11, capacitor C3, diodes D3, D4;
LM324集成运算放大器的引脚1～14连接着测试端1～14，测试端15依次通过电阻R2、R1、电位器Rw与测试端16连接，电阻R2的两端反向并联着二极管D1、D2，测试端16通过电阻R3与测试端22连接，测试端22接地，测试端22与测试端17间同时并联着电阻R4、电容C1，测试端22分别通过电阻R7、R8与测试端20、测试端21连接，测试端17依次通过电阻R5、电容C2与测试端18连接，测试端18通过电阻R6与测试端19连接；同时，测试端22连接着二极管D3的阴极，二极管D3的阳极与二极管D4的阳极连接，二极管D4的阳极分别通过电阻R9、R10与测试端23、测试端24连接，测试端24与测试端25间同时并联着电阻R11、电容C3。 Pins 1 to 14 of the LM324 integrated operational amplifier are connected to test terminals 1 to 14. Test terminal 15 is connected to test terminal 16 through resistors R2, R1, and potentiometer Rw in turn. Both ends of resistor R2 are connected in reverse parallel with diodes D1 and D2. , the test terminal 16 is connected to the test terminal 22 through the resistance R3, the test terminal 22 is grounded, the resistance R4 and the capacitor C1 are connected in parallel between the test terminal 22 and the test terminal 17, and the test terminal 22 is connected to the test terminal 20 and the test terminal 20 through the resistance R7 and R8 respectively. Terminal 21 is connected, and test terminal 17 is connected to test terminal 18 through resistance R5 and capacitor C2 in turn, and test terminal 18 is connected to test terminal 19 through resistance R6; meanwhile, test terminal 22 is connected to the cathode of diode D3, and the anode of diode D3 is connected to the diode The anode of D4 is connected, and the anode of diode D4 is connected to test terminal 23 and test terminal 24 through resistors R9 and R10 respectively, and resistor R11 and capacitor C3 are connected in parallel between test terminal 24 and test terminal 25 .
所述波形产生和变换电路实验装置的使用过程如下：The use process of the waveform generation and conversion circuit experimental device is as follows:
A、检查实验装置上LM324集成运算放大器的芯片是否安装正确，LM324集成运算放大器内部共有4组运算放大器，根据需要，学生自行选择使用哪3组运算放大器；A. Check whether the chip of the LM324 integrated operational amplifier on the experimental device is installed correctly. There are 4 groups of operational amplifiers in the LM324 integrated operational amplifier. Students can choose which 3 groups of operational amplifiers to use according to their needs;
B、从试验台上通过导线将+12V电源与测试端4连接，接地端与测试端22连接，-12V电源与测试端11连接；B. From the test bench, connect the +12V power supply to the test terminal 4, the ground terminal to the test terminal 22, and the -12V power supply to the test terminal 11 through wires;
C、用导线将测试端2与测试端16连接，测试端3与测试端17连接，测试端1同时与测试端15和测试端18连接；C, test terminal 2 is connected with test terminal 16 with lead wire, and test terminal 3 is connected with test terminal 17, and test terminal 1 is connected with test terminal 15 and test terminal 18 simultaneously;
D、将双通示波器的的接地端与测试端22连接，接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端1，调节双通示波器，在双通示波器的显示界面可观察到正弦波，可通过电位器Rw调节正弦波的占空比；D. Connect the ground terminal of the dual-pass oscilloscope to the test terminal 22, connect the power supply of the experimental device and the dual-pass oscilloscope, select the channel CH1 or CH2 of the dual-pass oscilloscope, connect its probe to the test terminal 1, and adjust the dual-pass oscilloscope , the sine wave can be observed on the display interface of the dual-pass oscilloscope, and the duty cycle of the sine wave can be adjusted through the potentiometer Rw;
E、关闭电源，用导线将测试端6与测试端19连接，测试端5与测试端20连接；E, turn off the power supply, connect the test terminal 6 to the test terminal 19 with a wire, and connect the test terminal 5 to the test terminal 20;
F、接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端7，调节双通示波器，在双通示波器的显示界面可观察到矩形波；学生可在双通示波器中同时观察正弦波与矩形波；F. Connect the power supply of the experimental device and the dual-pass oscilloscope, select the CH1 channel or CH2 channel of the dual-pass oscilloscope to connect its probe to the test terminal 7, adjust the dual-pass oscilloscope, and a rectangular wave can be observed on the display interface of the dual-pass oscilloscope; Students can simultaneously observe sine waves and rectangular waves in a dual-pass oscilloscope;
G、关闭电源，用导线将测试端10与测试端21连接，测试端9与测试端24连接，测试端23与测试端7连接，测试端8与测试端25连接；G, power off, test terminal 10 is connected with test terminal 21 with lead wire, test terminal 9 is connected with test terminal 24, test terminal 23 is connected with test terminal 7, test terminal 8 is connected with test terminal 25;
H、接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端8，调节双通示波器，在双通示波器的显示界面可观察到三角波信号；学生可在双通示波器中同时观察正弦波与三角波信号或矩形波与三角波信号；H, connect the power supply of the experimental device and the dual-pass oscilloscope, select the dual-pass oscilloscope CH1 channel or CH2 channel to connect its probe to the test terminal 8, adjust the dual-pass oscilloscope, and the triangle wave signal can be observed on the display interface of the dual-pass oscilloscope; Students can simultaneously observe sine wave and triangle wave signals or rectangular wave and triangle wave signals in a dual-pass oscilloscope;
I、实验结束，关闭电源，拆除导线。I. When the experiment is over, turn off the power and remove the wires.
本实用新型的有益效果是：The beneficial effects of the utility model are:
本实用新型根据电路原理图设计制作PCB板，并在相应位置留出测试端，学生可以根据电路原理图用导线将测试端连接起来，并在相应位置接入双通示波器观察实验中波形的变化情况；The utility model designs and manufactures the PCB board according to the circuit schematic diagram, and leaves a test terminal at the corresponding position. Students can connect the test terminals with wires according to the circuit schematic diagram, and connect the double-pass oscilloscope at the corresponding position to observe the waveform change in the experiment. Happening;
本实用新型通过解决学生在自己搭建波形产生和变换电路时，由于焊接、布局经验不足而导致所搭建的电路失败，不能在规定课时内完成实验任务，从而影响教学进度等教学事故的发生，本实用新型使学生能在规定课时内根据电路原理图在实验板上完成实验，且锻炼了学生的动手能力和元器件识别的能力，从而提高了教学质量和教学进度。The utility model solves the problem of teaching accidents such as the failure of the circuit built by the students due to insufficient experience in welding and layout when they build the waveform generation and conversion circuit by themselves, and cannot complete the experimental task within the prescribed class hours, thereby affecting the teaching progress. The utility model enables students to complete experiments on the experimental board according to the circuit schematic diagram within the prescribed class hours, and exercises the students' hands-on ability and component identification ability, thereby improving the teaching quality and teaching progress.
附图说明Description of drawings
图1是本实用新型使用时连接形成的电路原理图；Fig. 1 is the schematic diagram of the circuit formed when the utility model is used;
图2是本实用新型的实验装置的电路原理图。Fig. 2 is the schematic circuit diagram of the experimental device of the present utility model.
图1中各标号：1-正弦波发生器、2-矩形波变换电路、3-三角波变换电路、C1～C3-电容、Rw-电位器、R1～R11-电阻、A1～A3-运算放大器、D1～D4-二极管。The labels in Figure 1: 1-sine wave generator, 2-rectangular wave conversion circuit, 3-triangular wave conversion circuit, C1～C3-capacitor, Rw-potentiometer, R1～R11-resistor, A1～A3-operational amplifier, D1 ~ D4 - diodes.
图2中各标号：LM324-集成运算放大器、1～25-测试端，C1～C3-电容、Rw-电位器、R1～R11-电阻、D1～D4-二极管。Each label in Fig. 2: LM324-integrated operational amplifier, 1~25-test terminal, C1~C3-capacitor, Rw-potentiometer, R1~R11-resistor, D1~D4-diode.
具体实施方式Detailed ways
下面结合附图和具体实施例，对本实用新型作进一步说明。Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
实施例1：如图2所示，一种波形产生和变换电路实验装置，包括正弦波发生器1、矩形波变换电路2和三角波变换电路3；还包括25个测试端；Embodiment 1: as shown in Figure 2, a kind of waveform generation and conversion circuit experimental device, comprises sine wave generator 1, rectangular wave conversion circuit 2 and triangular wave conversion circuit 3; Also includes 25 test terminals;
所述正弦波发生器1包括运算放大器A1、电位器Rw、电阻R1、R2、R3、R4、R5、电容C1、C2、二极管D1、D2；The sine wave generator 1 includes an operational amplifier A1, a potentiometer Rw, resistors R1, R2, R3, R4, R5, capacitors C1, C2, diodes D1, D2;
所述矩形波变换电路2包括运算放大器A2、电阻R6、R7；The rectangular wave conversion circuit 2 includes an operational amplifier A2, resistors R6, R7;
所述三角波变换电路3包括运算放大器A3、电阻R8、R9、R10、R11、电容C3、二极管D3、D4；The triangular wave conversion circuit 3 includes an operational amplifier A3, resistors R8, R9, R10, R11, capacitor C3, diodes D3, D4;
LM324集成运算放大器的引脚1～14连接着测试端1～14，测试端15依次通过电阻R2、R1、电位器Rw与测试端16连接，电阻R2的两端反向并联着二极管D1、D2，测试端16通过电阻R3与测试端22连接，测试端22接地，测试端22与测试端17间同时并联着电阻R4、电容C1，测试端22分别通过电阻R7、R8与测试端20、测试端21连接，测试端17依次通过电阻R5、电容C2与测试端18连接，测试端18通过电阻R6与测试端19连接；同时，测试端22连接着二极管D3的阴极，二极管D3的阳极与二极管D4的阳极连接，二极管D4的阳极分别通过电阻R9、R10与测试端23、测试端24连接，测试端24与测试端25间同时并联着电阻R11、电容C3。 Pins 1 to 14 of the LM324 integrated operational amplifier are connected to test terminals 1 to 14. Test terminal 15 is connected to test terminal 16 through resistors R2, R1, and potentiometer Rw in turn. Both ends of resistor R2 are connected in reverse parallel with diodes D1 and D2. , the test terminal 16 is connected to the test terminal 22 through the resistance R3, the test terminal 22 is grounded, the resistance R4 and the capacitor C1 are connected in parallel between the test terminal 22 and the test terminal 17, and the test terminal 22 is connected to the test terminal 20 and the test terminal 20 through the resistance R7 and R8 respectively. Terminal 21 is connected, and test terminal 17 is connected to test terminal 18 through resistance R5 and capacitor C2 in turn, and test terminal 18 is connected to test terminal 19 through resistance R6; meanwhile, test terminal 22 is connected to the cathode of diode D3, and the anode of diode D3 is connected to the diode The anode of D4 is connected, and the anode of diode D4 is connected to test terminal 23 and test terminal 24 through resistors R9 and R10 respectively, and resistor R11 and capacitor C3 are connected in parallel between test terminal 24 and test terminal 25 .
所述波形产生和变换电路实验装置的使用过程如下：The use process of the waveform generation and conversion circuit experimental device is as follows:
A、检查实验装置上LM324集成运算放大器的芯片是否安装正确，LM324集成运算放大器内部共有4组运算放大器，根据需要，学生自行选择使用哪3组运算放大器；A. Check whether the chip of the LM324 integrated operational amplifier on the experimental device is installed correctly. There are 4 groups of operational amplifiers in the LM324 integrated operational amplifier. Students can choose which 3 groups of operational amplifiers to use according to their needs;
B、从试验台上通过导线将+12V电源与测试端4连接，接地端与测试端22连接，-12V电源与测试端11连接；B. From the test bench, connect the +12V power supply to the test terminal 4, the ground terminal to the test terminal 22, and the -12V power supply to the test terminal 11 through wires;
C、用导线将测试端2与测试端16连接，测试端3与测试端17连接，测试端1同时与测试端15和测试端18连接；C, test terminal 2 is connected with test terminal 16 with lead wire, and test terminal 3 is connected with test terminal 17, and test terminal 1 is connected with test terminal 15 and test terminal 18 simultaneously;
D、将双通示波器的的接地端与测试端22连接，接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端1，调节双通示波器，在双通示波器的显示界面可观察到正弦波，可通过电位器Rw调节正弦波的占空比；D. Connect the ground terminal of the dual-pass oscilloscope to the test terminal 22, connect the power supply of the experimental device and the dual-pass oscilloscope, select the channel CH1 or CH2 of the dual-pass oscilloscope, connect its probe to the test terminal 1, and adjust the dual-pass oscilloscope , the sine wave can be observed on the display interface of the dual-pass oscilloscope, and the duty cycle of the sine wave can be adjusted through the potentiometer Rw;
E、关闭电源，用导线将测试端6与测试端19连接，测试端5与测试端20连接；E, turn off the power supply, connect the test terminal 6 to the test terminal 19 with a wire, and connect the test terminal 5 to the test terminal 20;
F、接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端7，调节双通示波器，在双通示波器的显示界面可观察到矩形波；学生可在双通示波器中同时观察正弦波与矩形波；F. Connect the power supply of the experimental device and the dual-pass oscilloscope, select the CH1 channel or CH2 channel of the dual-pass oscilloscope to connect its probe to the test terminal 7, adjust the dual-pass oscilloscope, and a rectangular wave can be observed on the display interface of the dual-pass oscilloscope; Students can simultaneously observe sine waves and rectangular waves in a dual-pass oscilloscope;
G、关闭电源，用导线将测试端10与测试端21连接，测试端9与测试端24连接，测试端23与测试端7连接，测试端8与测试端25连接，如图1所示；G, power off, test terminal 10 is connected with test terminal 21 with lead wire, test terminal 9 is connected with test terminal 24, test terminal 23 is connected with test terminal 7, test terminal 8 is connected with test terminal 25, as shown in Figure 1;
H、接通实验装置和双通示波器的电源，选择双通示波器CH1通道或CH2通道将其探极接入测试端8，调节双通示波器，在双通示波器的显示界面可观察到三角波信号；学生可在双通示波器中同时观察正弦波与三角波信号或矩形波与三角波信号；H, connect the power supply of the experimental device and the dual-pass oscilloscope, select the dual-pass oscilloscope CH1 channel or CH2 channel to connect its probe to the test terminal 8, adjust the dual-pass oscilloscope, and the triangle wave signal can be observed on the display interface of the dual-pass oscilloscope; Students can simultaneously observe sine wave and triangle wave signals or rectangular wave and triangle wave signals in a dual-pass oscilloscope;
I、实验结束，关闭电源，拆除导线。I. When the experiment is over, turn off the power and remove the wires.
使用时，连接起来的电路图如图1所示，所述正弦波发生器1、矩形波变换电路2和三角波变换电路3依次连接；During use, the connected circuit diagram is as shown in Figure 1, and the sine wave generator 1, the rectangular wave conversion circuit 2 and the triangular wave conversion circuit 3 are connected successively;
所述正弦波发生器1包括集成运算放大器A1、电位器Rw、电阻R1、R2、R3、R4、R5、电容C1、C2、二极管D1、D2；所述集成运算放大器A1的反相端依次通过电位器Rw、电阻R1、R2与其输出端连接，电阻R2的两端反向并联着二极管D1、D2，集成运算放大器A1的反相端通过电阻R3接地，集成运算放大器A1的同相端依次通过电阻R5、电容C2与其输出端连接，集成运算放大器A1的同相端与地间同时并联着电阻R4、电容C1；The sine wave generator 1 includes an integrated operational amplifier A1, a potentiometer Rw, resistors R1, R2, R3, R4, R5, capacitors C1, C2, diodes D1, D2; the inverting end of the integrated operational amplifier A1 passes through Potentiometer Rw, resistors R1, R2 are connected to their output terminals, the two ends of resistor R2 are connected in reverse parallel with diodes D1, D2, the inverting terminal of integrated operational amplifier A1 is grounded through resistor R3, and the non-inverting terminal of integrated operational amplifier A1 is sequentially passed through resistors R5 and capacitor C2 are connected to its output terminal, and resistor R4 and capacitor C1 are connected in parallel between the non-inverting terminal of the integrated operational amplifier A1 and the ground;
所述矩形波变换电路2包括集成运算放大器A2、电阻R6、R7；所述集成运算放大器A2的反相端通过电阻R6与集成运算放大器A1的输出端连接，集成运算放大器A2的同相端通过电阻R7接地；The rectangular wave conversion circuit 2 includes an integrated operational amplifier A2, resistors R6, R7; the inverting end of the integrated operational amplifier A2 is connected to the output terminal of the integrated operational amplifier A1 through a resistor R6, and the non-inverting end of the integrated operational amplifier A2 is connected through a resistor R6. R7 is grounded;
所述三角波变换电路3包括集成运算放大器A3、电阻R8、R9、R10、R11、电容C3、二极管D3、D4；所述集成运算放大器A3的反相端依次通过电阻R10、R9与集成运算放大器A2的输出端连接，集成运算放大器A3的反相端通过电阻R10与二极管D4的阴极连接，二极管D4的阳极与二极管D3的阳极连接，二极管D3的阴极接地；集成运算放大器A3的同相端通过电阻R8接地，集成运算放大器A3的输出端与其反相端间同时并联着电阻R11、电容C3。The triangular wave conversion circuit 3 includes an integrated operational amplifier A3, resistors R8, R9, R10, R11, capacitor C3, diodes D3, D4; the inverting end of the integrated operational amplifier A3 passes through the resistors R10, R9 and the integrated operational amplifier A2 The output terminal of the integrated operational amplifier A3 is connected to the output terminal of the integrated operational amplifier A3 through the resistor R10. grounded, and a resistor R11 and a capacitor C3 are connected in parallel between the output terminal of the integrated operational amplifier A3 and its inverting terminal.
上面结合附图对本实用新型的具体实施例作了详细说明，但是本实用新型并不限于上述实施例，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本实用新型宗旨的前提下作出各种变化。The specific embodiments of the utility model have been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiments. Various changes are made.
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