CN103092242B - Constant current type controller - Google Patents
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Abstract
Description
技术领域 technical field
本发明涉及电源控制技术领域，尤其涉及一种恒流式控制器。 The invention relates to the technical field of power supply control, in particular to a constant current controller.
背景技术 Background technique
发光二极管（LED），电阻等电子元件在不同温度时，其阻抗也不同，如果采用恒电压控制的话，那么，在不同温度下，由于阻抗的变化，其电流也会发生变化。而发光二极管的亮度与电流基本成正比，如果发光二极管采用恒电压控制的方式，在不同温度下，会出现亮度较大漂移的情况，而采用恒电流式控制器，可以大大减少这种现象。 Light-emitting diodes (LEDs), resistors and other electronic components have different impedances at different temperatures. If constant voltage control is used, then at different temperatures, due to changes in impedance, their currents will also change. The brightness of the light-emitting diode is basically proportional to the current. If the light-emitting diode is controlled by constant voltage, there will be a large drift in brightness at different temperatures. Using a constant current controller can greatly reduce this phenomenon.
现有的一种LED恒流控制器，包括滤波电路、电流检测电路和稳压稳流电路，所述滤波电路包括一个单相桥式整流滤波器、电感线圈、电解式电容器C1和磁片式电容器C2，所述电解式电容器C1和磁片式电容器C2并联在所述滤波电路上；所述电流检测电路由电阻R1、R2、R3和R4连接形成，所述电流检测电路与滤波电路连接；所述稳压稳流电路的Vin端与LED+连接，稳压稳流电路的Mosc端通过R6、R3和电感线圈连接LED-。现有的恒流控制器的输出最大电流强度是不能改变的，故调整输出电流大小不够方便。 An existing LED constant current controller includes a filter circuit, a current detection circuit and a voltage and current stabilization circuit. The filter circuit includes a single-phase bridge rectifier filter, an inductance coil, an electrolytic capacitor C1 and a magnetic chip Capacitor C2, the electrolytic capacitor C1 and the magnetic chip capacitor C2 are connected in parallel on the filter circuit; the current detection circuit is formed by connecting resistors R1, R2, R3 and R4, and the current detection circuit is connected to the filter circuit; The Vin end of the voltage and current stabilizing circuit is connected to LED+, and the Mosc end of the voltage and current stabilizing circuit is connected to LED- through R6, R3 and the inductance coil. The maximum output current intensity of the existing constant current controller cannot be changed, so it is not convenient to adjust the output current.
发明内容 Contents of the invention
本发明提供一种可以方便调整输出电流大小的恒流式控制器。 The invention provides a constant current controller which can conveniently adjust the magnitude of the output current.
一种恒流式控制器，包括标识传感器适配电路、触发输入与触发极性选择电路、输出电流强度调节电路、恒定电流产生与输出电路；标识传感器适配电路的输入端与标识传感器连接，标识传感器适配电路的信号输出端与输出电流强度调节电路的信号输入端连接，输出电流强度调节电路的信号输出端与恒定电流产生与输出电路的电流信号输入端连接，触发输入与触发极性选择电路的信号输入端与触发源连接，触发输入与触发极性选择电路的信号输出端与恒定电流产生与输出电路的触发信号输入端连接； A constant-current controller, comprising an identification sensor adaptation circuit, a trigger input and trigger polarity selection circuit, an output current intensity adjustment circuit, a constant current generation and output circuit; the input end of the identification sensor adaptation circuit is connected to the identification sensor, The signal output end of the identification sensor adaptation circuit is connected to the signal input end of the output current intensity adjustment circuit, the signal output end of the output current intensity adjustment circuit is connected to the current signal input end of the constant current generation and output circuit, and the trigger input and trigger polarity The signal input end of the selection circuit is connected with the trigger source, and the trigger input is connected with the signal output end of the trigger polarity selection circuit with the trigger signal input end of the constant current generation and output circuit;
标识传感器适配电路识别标识传感器，并将识别信号发送到输出电流强度调节电路，输出电流强度调节电路根据识别信号确定最大输出电流值，输出电流强度调节电路根据最大输出电流值与当前调节档位确定当前输出电流值，并将当前输出电流值信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路根据该当前输出电流值信号确定当前输出电流强度；触发输入与触发极性选择电路接收到触发信号后，将触发信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路接收到触发信号后对外输出恒定电流。 The identification sensor adaptation circuit identifies the identification sensor and sends the identification signal to the output current intensity adjustment circuit. The output current intensity adjustment circuit determines the maximum output current value according to the identification signal, and the output current intensity adjustment circuit determines the maximum output current value according to the current adjustment gear. Determine the current output current value, and send the current output current value signal to the constant current generation and output circuit, and the constant current generation and output circuit determines the current output current intensity according to the current output current value signal; the trigger input and trigger polarity selection circuit receive After the trigger signal is received, the trigger signal is sent to the constant current generation and output circuit, and the constant current generation and output circuit outputs a constant current after receiving the trigger signal.
其中，标识传感器适配电路包括至少1个适配子电路；适配子电路包括双电压比较器U100B，三端输出可调稳压器U101，连接器J100，电阻R104，电容C102；U100B的型号为LM393，U101的型号为LM317L，U100B的7脚与Vcon1端连接，U100B的5脚与+2.5V电源连接，U100B的6脚与Rset1端、U100B的第2端、R104的一端、C102的一端连接，U101的第1端与电源VCC连接，U101的第3端与R104的另一端连接，C102的另一端、J100的1脚与地连接，J100的2脚与Rset1端连接； Among them, the identification sensor adaptation circuit includes at least one adaptation sub-circuit; the adaptation sub-circuit includes a dual-voltage comparator U100B, a three-terminal output adjustable voltage regulator U101, a connector J100, a resistor R104, and a capacitor C102; the model of U100B It is LM393, the model of U101 is LM317L, the 7 pins of U100B are connected to the Vcon1 terminal, the 5 pins of U100B are connected to the +2.5V power supply, the 6 pins of U100B are connected to the Rset1 terminal, the 2nd terminal of U100B, one end of R104, and one end of C102 Connection, the first end of U101 is connected to the power supply VCC, the third end of U101 is connected to the other end of R104, the other end of C102, pin 1 of J100 are connected to ground, and pin 2 of J100 is connected to Rset1;
触发输入与触发极性选择电路包括触发电平基准电路和至少1个触发子电路；触发电平基准电路包括电阻R1，三端稳压二极管U1，电容C15；触发子电路包括双电压比较器U100A，单刀双掷开关JP100，电阻R100、R101、R102、R103，电容C100、C101，连接器J3；U100A的型号为LM393，U1的型号为TL431，J3的1脚与Trig1端连接，Trig1端与R100的一端、R101的一端、C100的一端连接，R101的另一端与JP100的动端连接，JP100的第1不动端与Trig1+端连接，JP100的第2不动端与Trig1-端连接，Trig1+端与R102的一端、U100A的3脚连接，Trig1-端与R103的一端、U100A的2脚连接，U100A的1脚与Vcon1端连接，R102的另一端、R103的另一端、U1的1脚、U1的3脚、C15的一端、R1的一端与+2.5V电源连接，R100的另一端、U100A的8脚、C101的一端、R1的另一端与电源VCC连接，J3的2脚、C100的另一端、C101的另一端、U100A的4脚、U1的2脚、C15的另一端与地连接； The trigger input and trigger polarity selection circuit includes a trigger level reference circuit and at least one trigger subcircuit; the trigger level reference circuit includes a resistor R1, a three-terminal Zener diode U1, and a capacitor C15; the trigger subcircuit includes a dual voltage comparator U100A , SPDT switch JP100, resistors R100, R101, R102, R103, capacitors C100, C101, connector J3; the model of U100A is LM393, the model of U1 is TL431, the 1 pin of J3 is connected to the Trig1 terminal, and the Trig1 terminal is connected to R100 One end of R101, one end of C100, the other end of R101 is connected to the moving end of JP100, the first fixed end of JP100 is connected to Trig1+ end, the second fixed end of JP100 is connected to Trig1- end, Trig1+ end Connect with one end of R102, pin 3 of U100A, Trig1-end with one end of R103, pin 2 of U100A, pin 1 of U100A with Vcon1, the other end of R102, the other end of R103, pin 1 of U1, U1 3 pins, one end of C15, one end of R1 are connected to +2.5V power supply, the other end of R100, 8 pins of U100A, one end of C101, the other end of R1 are connected to power supply VCC, 2 pins of J3, the other end of C100 , the other end of C101, pin 4 of U100A, pin 2 of U1, and the other end of C15 are connected to the ground;
输出电流强度调节电路包括至少1个调节子电路；调节子电路包括运算放大器U102B，连接器J101，可调电阻WR100、WR101，电容C103；U102B的型号为TLC2262，J101的1脚与Rset1端连接，J101的2脚与Iadj1端连接，J101的3脚与WR101的一端、WR101的滑动端连接，WR101的另一端与地连接，Iadj1端与C103的一端、U102B的5脚连接，U102B的6脚与U102B的7脚、WR100的一端连接，WR100的滑动端与A01端连接，WR101的另一端、WR100的另一端、C103的另一端与地连接； The output current intensity adjustment circuit includes at least one adjustment sub-circuit; the adjustment sub-circuit includes an operational amplifier U102B, a connector J101, adjustable resistors WR100, WR101, and a capacitor C103; the model of U102B is TLC2262, and pin 1 of J101 is connected to Rset1. Pin 2 of J101 is connected to Iadj1, pin 3 of J101 is connected to one end of WR101 and the sliding end of WR101, the other end of WR101 is connected to ground, Iadj1 is connected to one end of C103 and pin 5 of U102B, pin 6 of U102B is connected to Connect pin 7 of U102B to one end of WR100, connect the sliding end of WR100 to A01, connect the other end of WR101, the other end of WR100, and the other end of C103 to ground;
恒定电流产生与输出电路包括至少1个输出子电路；输出子电路包括运算放大器U102A，场效应管Q100，电阻R108、R109、R110、R111，电容C104、C105、C107，连接器J102；U102A的型号为TLC2262，Q100的型号为IRL520，J102的1脚与电源VDD连接，J102的2脚与Iout1端连接，U102A的3脚与A01端连接，U102A的2脚与C105的一端、R108的一端、R110的一端、Q100的S端连接，U102A的1脚与C105的另一端、R109的一端连接，R109的另一端与R111的一端、Q100的G端连接，Q100的D端与Iout1端连接，R111的另一端与Vcon1端连接，U102A的8脚、C104的一端、R108的另一端、C107的正极与电源VCC连接，C107的负极、C104的另一端、U102A的4脚、R110的另一端与地连接。 The constant current generation and output circuit includes at least one output sub-circuit; the output sub-circuit includes operational amplifier U102A, field effect transistor Q100, resistors R108, R109, R110, R111, capacitors C104, C105, C107, connector J102; the model of U102A It is TLC2262, the model of Q100 is IRL520, pin 1 of J102 is connected to power supply VDD, pin 2 of J102 is connected to terminal Iout1, pin 3 of U102A is connected to terminal A01, pin 2 of U102A is connected to one end of C105, one end of R108, and R110 One end of Q100 is connected to the S end of Q100, pin 1 of U102A is connected to the other end of C105 and one end of R109, the other end of R109 is connected to one end of R111, and G end of Q100 is connected, D end of Q100 is connected to Iout1 end, R111’s The other end is connected to Vcon1, the pin 8 of U102A, one end of C104, the other end of R108, the positive pole of C107 are connected to the power supply VCC, the negative pole of C107, the other end of C104, pin 4 of U102A, and the other end of R110 are connected to the ground .
其中，还包括用于提供电源的电源分配电路； Among them, it also includes a power distribution circuit for providing power;
电源分配电路包括三端稳压器U4，直流稳压器U5，连接器Jp1、J6，电容C10、C11、C12、C13、C14、C16、C17、C18，二极管D2、D4；U4的型号为LM7805CT，U5的型号为LM7812CT，U4的3脚与电源VCC、C10的一端、C12的正极、Jp1的1脚连接，U4的1脚与Jp1的2脚、D2的负极、U5的1脚、C18的正极、C16的一端、D4的负极连接，U5的3脚与+12V电源、C11的一端、C14的正极、D2的正极连接，D4的正极与C17的一端、C13的正极、电源VDD、J6的1脚、J6的2脚连接，J6的3脚、J6的4脚、C10的另一端、C12的负极、U4的2脚、C11的另一端、C14的负极、U5的2脚、C18的负极、C16的另一端、C17的另一端、C13的负极与地连接。 The power distribution circuit includes three-terminal voltage regulator U4, DC voltage regulator U5, connectors Jp1, J6, capacitors C10, C11, C12, C13, C14, C16, C17, C18, diodes D2, D4; the model of U4 is LM7805CT , the model of U5 is LM7812CT, the 3 pins of U4 are connected with the power supply VCC, one end of C10, the positive pole of C12, and the 1 pin of Jp1, the 1 pin of U4 is connected with the 2 pins of Jp1, the negative pole of D2, the 1 pin of U5, and the pin of C18 The positive pole, one end of C16, the negative pole of D4 are connected, the 3 pins of U5 are connected with +12V power supply, one end of C11, the positive pole of C14, the positive pole of D2, the positive pole of D4 is connected with one end of C17, the positive pole of C13, the power supply VDD, and the power supply of J6 Pin 1, pin 2 of J6, pin 3 of J6, pin 4 of J6, the other end of C10, negative pole of C12, pin 2 of U4, the other end of C11, negative pole of C14, pin 2 of U5, negative pole of C18 , the other end of C16, the other end of C17, and the negative pole of C13 are connected to the ground.
其中，标识传感器适配电路包括4个适配子电路，触发输入与触发极性选择电路包括4个触发子电路，输出电流强度调节电路包括4个调节子电路，恒定电流产生与输出电路包括4个输出子电路；第1个适配子电路、第1个触发子电路、第1个调节子电路、第1个输出子电路构成第1个电流控制通道；第2个适配子电路、第2个触发子电路、第2个调节子电路、第2个输出子电路构成第2个电流控制通道；第3个适配子电路、第3个触发子电路、第3个调节子电路、第3个输出子电路构成第3个电流控制通道；第4个适配子电路、第4个触发子电路、第4个调节子电路、第4个输出子电路构成第4个电流控制通道。 Among them, the identification sensor adaptation circuit includes 4 adaptation sub-circuits, the trigger input and trigger polarity selection circuit includes 4 trigger sub-circuits, the output current intensity adjustment circuit includes 4 adjustment sub-circuits, and the constant current generation and output circuit includes 4 output sub-circuit; the first adaptation sub-circuit, the first trigger sub-circuit, the first regulation sub-circuit, and the first output sub-circuit form the first current control channel; the second adaptation sub-circuit, the first output sub-circuit 2 triggering sub-circuits, the second regulating sub-circuit, and the second output sub-circuit form the second current control channel; the third adaptation sub-circuit, the third triggering sub-circuit, the third regulating sub-circuit, the third The three output subcircuits form the third current control channel; the fourth adaptation subcircuit, the fourth trigger subcircuit, the fourth adjustment subcircuit, and the fourth output subcircuit form the fourth current control channel.
其中，标识传感器适配电路包括传感器恒流供电电路和至少1个适配子电路；传感器恒流供电电路包括电阻R3，电容C23、C24，三端稳压二极管U8；适配子电路连接器J100，三极管Q100，双电压比较器U101B，运算放大器U1A，电阻R100、R101，电容C100，稳压二极管D100；Q100的型号为S9015，U101B的型号为LM393，U1A的型号为MC34072，R3的一端、U8的2脚、C23的一端、C24的负极与Vref端连接，R3的另一端与地连接，J100的1脚与Q100的集电极、D100的负极、C100的一端、U1A的3脚连接，Q100的集电极与Vref端连接，Q100的发射极与R100的一端连接，D100的正极与R101的一端、U101B的6脚连接，U101B的5脚与+2.5V电源连接，U101B的7脚与Vcon1端连接，U1A的2脚、U1A的1脚与Vref1端连接，J100的2脚、C100的另一端、R101的另一端、U1A的4脚与地连接，R100的另一端、U1A的8脚、U8的1脚、U8的3脚、C23的另一端、C24的正极与电源VDD连接； Among them, the identification sensor adaptation circuit includes a sensor constant current power supply circuit and at least one adaptation sub-circuit; the sensor constant current power supply circuit includes a resistor R3, capacitors C23, C24, and a three-terminal voltage regulator diode U8; the adaptation sub-circuit connector J100 , transistor Q100, dual voltage comparator U101B, operational amplifier U1A, resistors R100, R101, capacitor C100, Zener diode D100; the model of Q100 is S9015, the model of U101B is LM393, the model of U1A is MC34072, one end of R3, U8 Pin 2 of C23, negative pole of C24 is connected to Vref terminal, the other end of R3 is connected to ground, pin 1 of J100 is connected to collector of Q100, negative pole of D100, one end of C100, pin 3 of U1A is connected, and pin 3 of U1A is connected to The collector is connected to the Vref terminal, the emitter of Q100 is connected to one end of R100, the positive pole of D100 is connected to one end of R101, the 6 pin of U101B is connected, the 5 pin of U101B is connected to the +2.5V power supply, and the 7 pin of U101B is connected to the Vcon1 terminal , Connect pin 2 of U1A, pin 1 of U1A to Vref1, pin 2 of J100, the other end of C100, the other end of R101, pin 4 of U1A to ground, the other end of R100, pin 8 of U1A, and U8 Connect pin 1, pin 3 of U8, the other end of C23, and the positive pole of C24 to the power supply VDD;
触发输入与触发极性选择电路包括触发电平基准电路和至少1个触发子电路；触发电平基准电路包括运算放大器U3A，电阻R4、R5，电容C13、C14；触发子电路包括三端稳压二极管U101A，电阻R102、R103、R104、R105，单刀双掷开关JP100，电容C101，二极管D101，连接器J3；连接器J3的1脚与Trig1端连接，Trig1端与C101的一端连接、R102的一端、R103的一端，R103的另一端与JP100的动端连接，JP100的第1不动端与Trig1+端连接，JP100的第2不动端与Trig1-端连接，Trig1+端与R104的一端、D101的正极、U101A的3脚连接，Trig1-端与R105的一端、U101A的2脚连接，R104的另一端、R105的另一端与+2.5V电源连接，U101A的1脚与Vcon1端连接，C13的正极、C14的一端、R4的一端、R5的一端与U3A的3脚连接，U3A的2脚、U3A的1脚与+2.5V电源连接，R4的另一端与电源VCC连接，C13的负极、C14的另一端、R5的另一端、U3A的4脚、C101的另一端、U101A的4脚与地连接，U3A的8脚、R102的另一端、U101A的8脚与电源VDD连接； The trigger input and trigger polarity selection circuit includes a trigger level reference circuit and at least one trigger subcircuit; the trigger level reference circuit includes an operational amplifier U3A, resistors R4, R5, and capacitors C13 and C14; the trigger subcircuit includes a three-terminal regulator Diode U101A, resistors R102, R103, R104, R105, SPDT switch JP100, capacitor C101, diode D101, connector J3; pin 1 of connector J3 is connected to Trig1, Trig1 is connected to one end of C101, and one end of R102 , one end of R103, the other end of R103 is connected to the moving end of JP100, the first fixed end of JP100 is connected to the Trig1+ end, the second fixed end of JP100 is connected to the Trig1- end, the Trig1+ end is connected to one end of R104, the D101 Positive, U101A’s 3-pin connection, Trig1-end is connected to one end of R105, U101A’s 2-pin connection, the other end of R104, the other end of R105 is connected to +2.5V power supply, U101A’s 1-pin is connected to Vcon1 end, and the positive pole of C13 , One end of C14, one end of R4, one end of R5 are connected to pin 3 of U3A, pin 2 of U3A, pin 1 of U3A are connected to +2.5V power supply, the other end of R4 is connected to the power supply VCC, the negative pole of C13, the negative pole of C14 The other end, the other end of R5, 4 pins of U3A, the other end of C101, 4 pins of U101A are connected to the ground, 8 pins of U3A, the other end of R102, and 8 pins of U101A are connected to the power supply VDD;
输出电流强度调节电路包括至少1个调节子电路；调节子电路包括数模转换器U102，可调电阻WR100，电阻R106，电容C102；U102的型号为TLV56XX，U102的1脚与DataIn端连接，U102的2脚与Clk端连接，U102的3脚与Cs1端连接，U102的6脚与RefIn1连接，U102的7脚与RefOut1连接，WR100的一端与Vref1端连接，WR100的滑动端与R106的一端连接，R106的另一端与RefIn1端、C102的一端连接，C102的另一端、WR100的另一端与地连接； The output current intensity adjustment circuit includes at least one adjustment sub-circuit; the adjustment sub-circuit includes a digital-to-analog converter U102, an adjustable resistor WR100, a resistor R106, and a capacitor C102; the model of U102 is TLV56XX, and pin 1 of U102 is connected to DataIn. Pin 2 of U102 is connected to Clk, pin 3 of U102 is connected to Cs1, pin 6 of U102 is connected to RefIn1, pin 7 of U102 is connected to RefOut1, one end of WR100 is connected to Vref1, and the sliding end of WR100 is connected to one end of R106 , the other end of R106 is connected to the RefIn1 end and one end of C102, the other end of C102 and the other end of WR100 are connected to the ground;
恒定电流产生与输出电路包括负压发生电路和至少1个输出子电路；负压发生电路包括极性反转电源转换器U6，电容C9、C10、C12；输出子电路包括运算放大器U100，三极管Q101，电阻R107、R108、R109、R110、R111、R112、R113、R114、R115，可调电阻WR101，电容C103、C104、C105、C111，连接器J102；U100的型号为UA741，Q101的型号为TIP142，U6的型号为ICL7660，U6的2脚与C9的正极连接，U6的4脚与C9的负极连接，U6的5脚与C10的负极、-5V电源连接，U6的8脚与C12的正极、电源VCC连接，C10的正极、C12的负极与地连接，R109的一端与RefOut1端连接，R109的另一端与Vcon1端、U100的3脚、R108的一端连接，U100的2脚与R110的一端、R107的一端、C103的一端连接，U100的4脚与-5V电源连接，U100的1脚与WR101的一端连接，U100的5脚与WR101的另一端连接，WR101的滑动端与-5V电源连接，U100的6脚与Q101的基极连接，U100的7脚、Q101的集电极与电源VDD连接，R108的另一端与R115的一端、R113的一端、R114的一端、R112的一端、C111的正极、C104的一端连接，R115的另一端、R113的另一端、R114的另一端、R107的另一端、C103的另一端与Q101的发射极连接，R112的另一端与C105的一端、R111的一端、OutCheck1端连接，R110的另一端、R111的另一端、C111的负极、C104的另一端连接，C105的另一端与地连接。 The constant current generating and output circuit includes a negative voltage generating circuit and at least one output sub-circuit; the negative voltage generating circuit includes a polarity inversion power converter U6, capacitors C9, C10, and C12; the output sub-circuit includes an operational amplifier U100, and a transistor Q101 , resistors R107, R108, R109, R110, R111, R112, R113, R114, R115, adjustable resistor WR101, capacitors C103, C104, C105, C111, connector J102; the model of U100 is UA741, the model of Q101 is TIP142, The model of U6 is ICL7660, the 2 pins of U6 are connected to the positive pole of C9, the 4 pins of U6 are connected to the negative pole of C9, the 5 pins of U6 are connected to the negative pole of C10, -5V power supply, the 8 pins of U6 are connected to the positive pole of C12, the power supply VCC connection, the positive pole of C10, the negative pole of C12 are connected to the ground, one end of R109 is connected to RefOut1, the other end of R109 is connected to Vcon1, pin 3 of U100, one end of R108, pin 2 of U100 is connected to one end of R110, R107 Connect one end of C103 to one end of C103, connect pin 4 of U100 to -5V power supply, connect pin 1 of U100 to one end of WR101, connect pin 5 of U100 to the other end of WR101, connect the sliding end of WR101 to -5V power supply, and connect U100 Pin 6 of U100 is connected to the base of Q101, pin 7 of U100 and collector of Q101 are connected to the power supply VDD, the other end of R108 is connected to one end of R115, one end of R113, one end of R114, one end of R112, the positive pole of C111, and the positive pole of C104 The other end of R115, the other end of R113, the other end of R114, the other end of R107, the other end of C103 is connected to the emitter of Q101, the other end of R112 is connected to one end of C105, one end of R111, OutCheck1 end Connection, the other end of R110, the other end of R111, the negative pole of C111, the other end of C104, and the other end of C105 is connected to the ground.
其中，还包括用于控制恒流电源输出的运算控制电路、用于接口适配的上位机通讯接口电路、用于操作设置的用户接口电路； Among them, it also includes an arithmetic control circuit for controlling the output of the constant current power supply, a host computer communication interface circuit for interface adaptation, and a user interface circuit for operation settings;
用户接口电路包括型号为STC5402的单片机U1、开关S1、S2、S3；S1的一端与U1的8脚连接，S2的一端与U1的9脚连接，S3的一端与U1的10脚连接，S1的另一端、S2的另一端、S3的另一端接地； The user interface circuit includes a single-chip microcomputer U1 of the model STC5402, switches S1, S2, and S3; one end of S1 is connected to pin 8 of U1, one end of S2 is connected to pin 9 of U1, one end of S3 is connected to pin 10 of U1, and the end of S1 is connected to pin 8 of U1. The other end, the other end of S2, and the other end of S3 are grounded;
运算控制电路包括单片机U2，晶振Y1，电阻R1，电容C1、C3、C4，二极管D1；U2的型号为STC12c2054AD，Y1的一端与U2的4脚、C1的一端连接，Y1的另一端与U2的5脚、C3的一端连接，R1的一端与D1的负极、U2的1脚、C4的负极连接，C4的正极与电源VCC连接，R1的另一端、D1的正极、C1的另一端、C3的另一端与地连接； The operation control circuit includes single-chip microcomputer U2, crystal oscillator Y1, resistor R1, capacitors C1, C3, C4, and diode D1; the model of U2 is STC12c2054AD, one end of Y1 is connected to pin 4 of U2 and one end of C1, and the other end of Y1 is connected to the 5 feet, one end of C3 is connected, one end of R1 is connected to the negative pole of D1, 1 pin of U2, and the negative pole of C4, the positive pole of C4 is connected to the power supply VCC, the other end of R1, the positive pole of D1, the other end of C1, and the The other end is connected to ground;
上位机通讯接口电路包括兼容RS232标准的芯片U5，连接器J2，电容C5、C6、C7、C8、C11，瞬变二极管RV1、RV2；U5的型号为MAX232，RV1和RV2的型号为P4KE13CA，J2的1脚与U5的14脚连接，J2的2脚与U5的13脚连接，C5连接在U5的1脚与U5的3脚之间，C7连接在U5的4脚与U5的5脚之间，C11连接在U5的15脚与U5的16脚之间，U5的2脚与C6的一端连接，U5的6脚与C8的一端连接，C6的另一端、C8的另一端与地连接。 The upper computer communication interface circuit includes chip U5 compatible with RS232 standard, connector J2, capacitors C5, C6, C7, C8, C11, transient diodes RV1, RV2; the model of U5 is MAX232, the model of RV1 and RV2 is P4KE13CA, J2 Pin 1 of U5 is connected to pin 14 of U5, pin 2 of J2 is connected to pin 13 of U5, C5 is connected between pin 1 of U5 and pin 3 of U5, C7 is connected between pin 4 of U5 and pin 5 of U5 , C11 is connected between pin 15 of U5 and pin 16 of U5, pin 2 of U5 is connected to one end of C6, pin 6 of U5 is connected to one end of C8, the other end of C6 and the other end of C8 are connected to ground.
其中，还包括用于提供电源的电源分配电路； Among them, it also includes a power distribution circuit for providing power;
电源分配电路包括三端稳压器U7，运算放大器U3B，连接器J4、J5，三极管Q1，二极管D4、D5，电容C15、C16、C17、C18、C19、C20，可调电阻WR1；U7的型号为LM7805CT，U3B的型号为MC34072，Q1的型号为TIP142，U7的1脚连接+24V电源，U7的3脚连接电源VCC、C15正极，J4的1脚、J4的2脚连接+24V电源，C18的正极、C19的一端、WR1的一端、Q1的发射极、D4的正极与+24V电源连接，D4的负极与Q1的集电极、电源VDD连接，Q1的基极与C20的一端、U3B的7脚连接，U3B的6脚与C20的另一端、WR1的滑动端连接，U3B的5脚与+2.5V电源连接，C16的一端、C17的正极、D5的负极、J5的1脚、J5的2脚、J5的3脚与电源VDD连接，J5的4脚、J5的5脚、J5的6脚、C16的另一端、C17的负极、D5的正极、WR1的另一端、C19的另一端、C18的负极、C15的负极与地连接。 The power distribution circuit includes three-terminal regulator U7, operational amplifier U3B, connectors J4, J5, transistor Q1, diodes D4, D5, capacitors C15, C16, C17, C18, C19, C20, adjustable resistor WR1; the model of U7 It is LM7805CT, the model of U3B is MC34072, the model of Q1 is TIP142, the 1 pin of U7 is connected to the +24V power supply, the 3 pin of U7 is connected to the power supply VCC, the positive pole of C15, the 1 pin of J4, the 2 pin of J4 are connected to the +24V power supply, C18 The positive pole of C19, one end of WR1, the emitter of Q1, the positive pole of D4 are connected to the +24V power supply, the negative pole of D4 is connected to the collector of Q1, and the power supply VDD, the base of Q1 is connected to one end of C20, and the 7 Pin connection, 6 pins of U3B are connected with the other end of C20 and the sliding end of WR1, 5 pins of U3B are connected with +2.5V power supply, one end of C16, positive pole of C17, negative pole of D5, 1 pin of J5, 2 pins of J5 Pin 3 of J5 is connected to the power supply VDD, pin 4 of J5, pin 5 of J5, pin 6 of J5, the other end of C16, the negative pole of C17, the positive pole of D5, the other end of WR1, the other end of C19, C18 The negative pole of C15 and the negative pole of C15 are connected to the ground.
其中，标识传感器适配电路包括2个适配子电路，触发输入与触发极性选择电路包括2个触发子电路，输出电流强度调节电路包括2个调节子电路，恒定电流产生与输出电路包括2个输出子电路；第1个适配子电路、第1个触发子电路、第1个调节子电路、第1个输出子电路构成第1个电流控制通道；第2个适配子电路、第2个触发子电路、第2个调节子电路、第2个输出子电路构成第2个电流控制通道。 Among them, the identification sensor adaptation circuit includes 2 adaptation sub-circuits, the trigger input and trigger polarity selection circuit includes 2 trigger sub-circuits, the output current intensity adjustment circuit includes 2 adjustment sub-circuits, and the constant current generation and output circuit includes 2 output sub-circuit; the first adaptation sub-circuit, the first trigger sub-circuit, the first regulation sub-circuit, and the first output sub-circuit form the first current control channel; the second adaptation sub-circuit, the first output sub-circuit The 2 triggering sub-circuits, the 2nd regulating sub-circuit and the 2nd outputting sub-circuit constitute the 2nd current control channel.
本发明有益效果：其包括标识传感器适配电路、触发输入与触发极性选择电路、输出电流强度调节电路、恒定电流产生与输出电路。标识传感器适配电路识别标识传感器，并将识别信号发送到输出电流强度调节电路，输出电流强度调节电路根据识别信号确定最大输出电流值，输出电流强度调节电路根据最大输出电流值与当前调节档位确定当前输出电流值，并将当前输出电流值信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路根据该当前输出电流值信号确定当前输出电流强度；触发输入与触发极性选择电路接收到触发信号后，将触发信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路接收到触发信号后对外输出恒定电流。触发输入与触发极性选择电路实现输出的关闭和打开。当前调节档位可以根据调节电位器、计算机发出的指令或用户接口电路发出的指令确定。通过设置不同的标识传感器，输出电流强度调节电路可以确定不同的最大输出电流值；然后根据最大输出电流值与当前调节档位确定当前输出电流值；本发明可以方便调整输出电流大小，实现对输出电流的恒定控制，可以方便调整输出最大电流强度，从而调整最大输出负载。 Beneficial effects of the invention: it includes an identification sensor adaptation circuit, a trigger input and trigger polarity selection circuit, an output current intensity adjustment circuit, and a constant current generation and output circuit. The identification sensor adaptation circuit identifies the identification sensor and sends the identification signal to the output current intensity adjustment circuit. The output current intensity adjustment circuit determines the maximum output current value according to the identification signal, and the output current intensity adjustment circuit determines the maximum output current value according to the current adjustment gear. Determine the current output current value, and send the current output current value signal to the constant current generation and output circuit, and the constant current generation and output circuit determines the current output current intensity according to the current output current value signal; the trigger input and trigger polarity selection circuit receive After the trigger signal is received, the trigger signal is sent to the constant current generation and output circuit, and the constant current generation and output circuit outputs a constant current after receiving the trigger signal. The trigger input and trigger polarity selection circuit realize the closing and opening of the output. The current adjustment position can be determined according to the adjustment potentiometer, the instruction issued by the computer or the instruction issued by the user interface circuit. By setting different identification sensors, the output current intensity adjustment circuit can determine different maximum output current values; then determine the current output current value according to the maximum output current value and the current adjustment gear; The constant control of the current can easily adjust the maximum output current intensity, thereby adjusting the maximum output load.
附图说明 Description of drawings
图1为本发明的实施例1的方框示意图。 Fig. 1 is a schematic block diagram of Embodiment 1 of the present invention.
图2为本发明的实施例1的触发输入与触发极性选择电路图。 FIG. 2 is a circuit diagram of trigger input and trigger polarity selection in Embodiment 1 of the present invention.
图3为本发明的实施例1的标识传感器适配电路图。 Fig. 3 is a circuit diagram of an identification sensor adaptation in Embodiment 1 of the present invention.
图4为本发明的实施例1的输出电流强度调节电路图。 FIG. 4 is a circuit diagram of output current intensity adjustment in Embodiment 1 of the present invention.
图5为本发明的实施例1的恒定电流产生与输出电路图。 FIG. 5 is a circuit diagram of constant current generation and output in Embodiment 1 of the present invention.
图6为本发明的实施例1的电源分配电路图。 FIG. 6 is a power distribution circuit diagram of Embodiment 1 of the present invention.
图7为本发明的实施例2的方框示意图。 Fig. 7 is a schematic block diagram of Embodiment 2 of the present invention.
图8为本发明的实施例2的标识传感器适配电路图。 Fig. 8 is a circuit diagram of an identification sensor adaptation according to Embodiment 2 of the present invention.
图9为本发明的实施例2的触发输入与触发极性选择电路图。 FIG. 9 is a circuit diagram of trigger input and trigger polarity selection in Embodiment 2 of the present invention.
图10为本发明的实施例2的输出电流强度调节电路图。 FIG. 10 is a circuit diagram of output current intensity adjustment in Embodiment 2 of the present invention.
图11为本发明的实施例2的恒定电流产生与输出电路图。 Fig. 11 is a circuit diagram of constant current generation and output in Embodiment 2 of the present invention.
图12为本发明的实施例2的电源分配电路图。 Fig. 12 is a power distribution circuit diagram of Embodiment 2 of the present invention.
图13为本发明的实施例2的上位机通讯接口电路图。 Fig. 13 is a circuit diagram of the communication interface of the host computer according to Embodiment 2 of the present invention.
图14为本发明的实施例2的运算控制电路图。 Fig. 14 is a circuit diagram of an operation control circuit according to Embodiment 2 of the present invention.
图15为本发明的实施例2的用户接口电路图。 Fig. 15 is a circuit diagram of the user interface of Embodiment 2 of the present invention.
具体实施方式 Detailed ways
实施例1。 Example 1.
参见图1至图6，以下结合附图对本发明进行详细的描述。 Referring to Fig. 1 to Fig. 6, the present invention will be described in detail below in conjunction with the accompanying drawings.
本实施例的一种恒流式控制器，包括标识传感器适配电路、触发输入与触发极性选择电路、输出电流强度调节电路、恒定电流产生与输出电路；标识传感器适配电路的输入端与标识传感器连接，标识传感器适配电路的信号输出端与输出电流强度调节电路的信号输入端连接，输出电流强度调节电路的信号输出端与恒定电流产生与输出电路的电流信号输入端连接，触发输入与触发极性选择电路的信号输入端与触发源连接，触发输入与触发极性选择电路的信号输出端与恒定电流产生与输出电路的触发信号输入端连接； A constant current controller in this embodiment includes an identification sensor adaptation circuit, a trigger input and trigger polarity selection circuit, an output current intensity adjustment circuit, a constant current generation and output circuit; an input terminal of the identification sensor adaptation circuit and The identification sensor is connected, the signal output end of the identification sensor adaptation circuit is connected to the signal input end of the output current intensity adjustment circuit, the signal output end of the output current intensity adjustment circuit is connected to the current signal input end of the constant current generation and output circuit, and the trigger input The signal input end of the trigger polarity selection circuit is connected with the trigger source, and the trigger input is connected with the signal output end of the trigger polarity selection circuit with the trigger signal input end of the constant current generation and output circuit;
标识传感器适配电路识别标识传感器，并将识别信号发送到输出电流强度调节电路，输出电流强度调节电路根据识别信号确定最大输出电流值，输出电流强度调节电路根据最大输出电流值与当前调节档位确定当前输出电流值，并将当前输出电流值信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路根据该当前输出电流值信号确定当前输出电流强度；触发输入与触发极性选择电路接收到触发信号后，将触发信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路接收到触发信号后对外输出恒定电流。 The identification sensor adaptation circuit identifies the identification sensor and sends the identification signal to the output current intensity adjustment circuit. The output current intensity adjustment circuit determines the maximum output current value according to the identification signal, and the output current intensity adjustment circuit determines the maximum output current value according to the current adjustment gear. Determine the current output current value, and send the current output current value signal to the constant current generation and output circuit, and the constant current generation and output circuit determines the current output current intensity according to the current output current value signal; the trigger input and trigger polarity selection circuit receive After the trigger signal is received, the trigger signal is sent to the constant current generation and output circuit, and the constant current generation and output circuit outputs a constant current after receiving the trigger signal.
当前调节档位可以根据调节电位器、计算机发出的指令或用户接口电路发出的指令确定。当前调节档位调整当前输出电流值占最大输出电流值的比例；故根据最大输出电流值与当前调节档位就能确定当前输出电流值。每次使用该恒流式控制器时，可能需要为不同的外接设备提供恒流电源，故输出电流强度可能不相同；可通过设置当前调节档位，从而确定当前输出电流强度，以使输出电流符合要求，在这里，用“当前”表示其参数值是可以改变的。 The current adjustment position can be determined according to the adjustment potentiometer, the instruction issued by the computer or the instruction issued by the user interface circuit. The current adjustment gear adjusts the ratio of the current output current value to the maximum output current value; therefore, the current output current value can be determined according to the maximum output current value and the current adjustment gear. Every time the constant current controller is used, it may be necessary to provide constant current power for different external devices, so the output current intensity may be different; the current output current intensity can be determined by setting the current adjustment gear, so that the output current Meet the requirements, here, use "current" to indicate that its parameter value can be changed.
其中，标识传感器适配电路包括至少1个适配子电路；适配子电路包括双电压比较器U100B，三端输出可调稳压器U101，连接器J100，电阻R104，电容C102；U100B的型号为LM393，U101的型号为LM317L，U100B的7脚与Vcon1端连接，U100B的5脚与+2.5V电源连接，U100B的6脚与Rset1端、U100B的第2端、R104的一端、C102的一端连接，U101的第1端与电源VCC连接，U101的第3端与R104的另一端连接，C102的另一端、J100的1脚与地连接，J100的2脚与Rset1端连接。 Among them, the identification sensor adaptation circuit includes at least one adaptation sub-circuit; the adaptation sub-circuit includes a dual-voltage comparator U100B, a three-terminal output adjustable voltage regulator U101, a connector J100, a resistor R104, and a capacitor C102; the model of U100B It is LM393, the model of U101 is LM317L, the 7 pins of U100B are connected to the Vcon1 terminal, the 5 pins of U100B are connected to the +2.5V power supply, the 6 pins of U100B are connected to the Rset1 terminal, the 2nd terminal of U100B, one end of R104, and one end of C102 Connection, the first end of U101 is connected to the power supply VCC, the third end of U101 is connected to the other end of R104, the other end of C102, pin 1 of J100 are connected to ground, and pin 2 of J100 is connected to Rset1.
本实施例具有4个电流控制通道，具有4个适配子电路，它们的结构相同，上述内容仅描述其中1个适配子电路的结构；为便于阅读，4个电流控制通道的同样功能元器件的标号按一定规律变化，读者可结合附图理解变化规则。 This embodiment has 4 current control channels and 4 adapter sub-circuits with the same structure. The above content only describes the structure of one of the adapter sub-circuits; for ease of reading, the same functional elements of the 4 current control channels The label of the device changes according to a certain rule, and the reader can understand the change rule in conjunction with the attached drawings.
标识传感器适配电路中：Rx04、Ux01、C102组成标识传感器恒流供电电路，Ux00B构成标识传感器接入状态识别电路（标识传感器未接入时则禁止输出）。参见附图，x=1，2，3，4。标识传感器可以为标识电阻。通过设置不同标识传感器，可以调整输出电流大小。 In the identification sensor adaptation circuit: Rx04, Ux01, and C102 form the constant current power supply circuit for the identification sensor, and Ux00B forms the identification circuit for the identification sensor access state (the output is prohibited when the identification sensor is not connected). See attached picture, x=1,2,3,4. The identification sensor may be an identification resistor. By setting different identification sensors, the output current can be adjusted.
触发输入与触发极性选择电路包括触发电平基准电路和至少1个触发子电路；触发电平基准电路包括电阻R1，三端稳压二极管U1，电容C15；触发子电路包括双电压比较器U100A，单刀双掷开关JP100，电阻R100、R101、R102、R103，电容C100、C101，连接器J3；U100A的型号为LM393，U1的型号为TL431，J3的1脚与Trig1端连接，Trig1端与R100的一端、R101的一端、C100的一端连接，R101的另一端与JP100的动端连接，JP100的第1不动端与Trig1+端连接，JP100的第2不动端与Trig1-端连接，Trig1+端与R102的一端、U100A的3脚连接，Trig1-端与R103的一端、U100A的2脚连接，U100A的1脚与Vcon1端连接，R102的另一端、R103的另一端、U1的1脚、U1的3脚、C15的一端、R1的一端与+2.5V电源连接，R100的另一端、U100A的8脚、C101的一端、R1的另一端与电源VCC连接，J3的2脚、C100的另一端、C101的另一端、U100A的4脚、U1的2脚、C15的另一端与地连接。 The trigger input and trigger polarity selection circuit includes a trigger level reference circuit and at least one trigger subcircuit; the trigger level reference circuit includes a resistor R1, a three-terminal Zener diode U1, and a capacitor C15; the trigger subcircuit includes a dual voltage comparator U100A , SPDT switch JP100, resistors R100, R101, R102, R103, capacitors C100, C101, connector J3; the model of U100A is LM393, the model of U1 is TL431, the 1 pin of J3 is connected to the Trig1 terminal, and the Trig1 terminal is connected to R100 One end of R101, one end of C100, the other end of R101 is connected to the moving end of JP100, the first fixed end of JP100 is connected to Trig1+ end, the second fixed end of JP100 is connected to Trig1- end, Trig1+ end Connect with one end of R102, pin 3 of U100A, Trig1-end with one end of R103, pin 2 of U100A, pin 1 of U100A with Vcon1, the other end of R102, the other end of R103, pin 1 of U1, U1 3 pins, one end of C15, one end of R1 are connected to +2.5V power supply, the other end of R100, 8 pins of U100A, one end of C101, the other end of R1 are connected to power supply VCC, 2 pins of J3, the other end of C100 , the other end of C101, pin 4 of U100A, pin 2 of U1, and the other end of C15 are connected to ground.
触发输入与触发极性选择电路中：Rx00、Rx01、Cx00、Ux00A组成触发输入电路；Rx02、Rx03、JPx00组成触发极性选择电路；R1、C15、U1组成触发电平基准电路。X=1，2，3，4。 In the trigger input and trigger polarity selection circuit: Rx00, Rx01, Cx00, Ux00A form the trigger input circuit; Rx02, Rx03, JPx00 form the trigger polarity selection circuit; R1, C15, U1 form the trigger level reference circuit. X=1,2,3,4.
输出电流强度调节电路包括至少1个调节子电路；调节子电路包括运算放大器U102B，连接器J101，可调电阻WR100、WR101，电容C103；U102B的型号为TLC2262，J101的1脚与Rset1端连接，J101的2脚与Iadj1端连接，J101的3脚与WR101的一端、WR101的滑动端连接，WR101的另一端与地连接，Iadj1端与C103的一端、U102B的5脚连接，U102B的6脚与U102B的7脚、WR100的一端连接，WR100的滑动端与A01端连接，WR101的另一端、WR100的另一端、C103的另一端与地连接。 The output current intensity adjustment circuit includes at least one adjustment sub-circuit; the adjustment sub-circuit includes an operational amplifier U102B, a connector J101, adjustable resistors WR100, WR101, and a capacitor C103; the model of U102B is TLC2262, and pin 1 of J101 is connected to Rset1. Pin 2 of J101 is connected to Iadj1, pin 3 of J101 is connected to one end of WR101 and the sliding end of WR101, the other end of WR101 is connected to ground, Iadj1 is connected to one end of C103 and pin 5 of U102B, pin 6 of U102B is connected to Pin 7 of U102B is connected to one end of WR100, the sliding end of WR100 is connected to A01, the other end of WR101, the other end of WR100, and the other end of C103 are connected to ground.
输出电流强度调节电路中：通过Jx01接口接入的调节电位器起着控制电流强度作用，WRx01用作调节输出电流下限，WRx00用作调节输出电流上限，Ux02B负担着调节信号的增强功能。X=1，2，3，4。 In the output current intensity adjustment circuit: the adjustment potentiometer connected through the Jx01 interface plays the role of controlling the current intensity, WRx01 is used to adjust the lower limit of the output current, WRx00 is used to adjust the upper limit of the output current, and Ux02B is responsible for the enhancement of the adjustment signal. X=1,2,3,4.
恒定电流产生与输出电路包括至少1个输出子电路；输出子电路包括运算放大器U102A，场效应管Q100，电阻R108、R109、R110、R111，电容C104、C105、C107，连接器J102；U102A的型号为TLC2262，Q100的型号为IRL520，J102的1脚与电源VDD连接，J102的2脚与Iout1端连接，U102A的3脚与A01端连接，U102A的2脚与C105的一端、R108的一端、R110的一端、Q100的S端连接，U102A的1脚与C105的另一端、R109的一端连接，R109的另一端与R111的一端、Q100的G端连接，Q100的D端与Iout1端连接，R111的另一端与Vcon1端连接，U102A的8脚、C104的一端、R108的另一端、C107的正极与电源VCC连接，C107的负极、C104的另一端、U102A的4脚、R110的另一端与地连接。 The constant current generation and output circuit includes at least one output sub-circuit; the output sub-circuit includes operational amplifier U102A, field effect transistor Q100, resistors R108, R109, R110, R111, capacitors C104, C105, C107, connector J102; the model of U102A It is TLC2262, the model of Q100 is IRL520, pin 1 of J102 is connected to power supply VDD, pin 2 of J102 is connected to terminal Iout1, pin 3 of U102A is connected to terminal A01, pin 2 of U102A is connected to one end of C105, one end of R108, and R110 One end of Q100 is connected to the S end of Q100, pin 1 of U102A is connected to the other end of C105 and one end of R109, the other end of R109 is connected to one end of R111, and G end of Q100 is connected, D end of Q100 is connected to Iout1 end, R111’s The other end is connected to Vcon1, the pin 8 of U102A, one end of C104, the other end of R108, the positive pole of C107 are connected to the power supply VCC, the negative pole of C107, the other end of C104, pin 4 of U102A, and the other end of R110 are connected to the ground .
恒定电流产生与输出电路中： Rx08、Rx09、Rx10、Cx05、Ux02A、Qx00组成恒流电路，输出电流= V / Rs；其中V=Ux02A正输入端（第3脚）的对地电压、Rs=Rx10；在Rs固定的情况下，通过改变不同的V值，就能得到不同的电流输出值。X=1，2，3，4。 In the constant current generation and output circuit: Rx08, Rx09, Rx10, Cx05, Ux02A, Qx00 form a constant current circuit, output current = V / Rs; where V=Ux02A positive input (pin 3) to ground voltage, Rs= Rx10; in the case of fixed Rs, by changing different V values, different current output values can be obtained. X=1,2,3,4.
本实施例中，还包括用于提供电源的电源分配电路。当然，还可以包括交直流转换模块，电源分配电路与交直流转换模块连接，交直流转换是现有技术，这里不再赘述。 In this embodiment, a power distribution circuit for providing power is also included. Of course, it may also include an AC-DC conversion module, and the power distribution circuit is connected to the AC-DC conversion module. The AC-DC conversion is a prior art, and will not be repeated here.
电源分配电路包括三端稳压器U4，直流稳压器U5，连接器Jp1、J6，电容C10、C11、C12、C13、C14、C16、C17、C18，二极管D2、D4；U4的型号为LM7805CT，U5的型号为LM7812CT，U4的3脚与电源VCC、C10的一端、C12的正极、Jp1的1脚连接，U4的1脚与Jp1的2脚、D2的负极、U5的1脚、C18的正极、C16的一端、D4的负极连接，U5的3脚与+12V电源、C11的一端、C14的正极、D2的正极连接，D4的正极与C17的一端、C13的正极、电源VDD、J6的1脚、J6的2脚连接，J6的3脚、J6的4脚、C10的另一端、C12的负极、U4的2脚、C11的另一端、C14的负极、U5的2脚、C18的负极、C16的另一端、C17的另一端、C13的负极与地连接。 The power distribution circuit includes three-terminal voltage regulator U4, DC voltage regulator U5, connectors Jp1, J6, capacitors C10, C11, C12, C13, C14, C16, C17, C18, diodes D2, D4; the model of U4 is LM7805CT , the model of U5 is LM7812CT, the 3 pins of U4 are connected with the power supply VCC, one end of C10, the positive pole of C12, and the 1 pin of Jp1, the 1 pin of U4 is connected with the 2 pins of Jp1, the negative pole of D2, the 1 pin of U5, and the pin of C18 The positive pole, one end of C16, the negative pole of D4 are connected, the 3 pins of U5 are connected with +12V power supply, one end of C11, the positive pole of C14, the positive pole of D2, the positive pole of D4 is connected with one end of C17, the positive pole of C13, the power supply VDD, and the power supply of J6 Pin 1, pin 2 of J6, pin 3 of J6, pin 4 of J6, the other end of C10, negative pole of C12, pin 2 of U4, the other end of C11, negative pole of C14, pin 2 of U5, negative pole of C18 , the other end of C16, the other end of C17, and the negative pole of C13 are connected to the ground.
电源分配电路向各模块提供符合使用要求的电压源。U5、D2、C11、C14是12V稳压电路，供电给系统的冷却风扇；C10、C12、U4是5V稳压电路，供电给系统的控制部分。 The power distribution circuit provides each module with a voltage source that meets the requirements of use. U5, D2, C11, and C14 are 12V voltage stabilizing circuits that supply power to the cooling fan of the system; C10, C12, and U4 are 5V voltage stabilizing circuits that supply power to the control part of the system.
本实施例中，标识传感器适配电路包括4个适配子电路，触发输入与触发极性选择电路包括4个触发子电路，输出电流强度调节电路包括4个调节子电路，恒定电流产生与输出电路包括4个输出子电路；第1个适配子电路、第1个触发子电路、第1个调节子电路、第1个输出子电路构成第1个电流控制通道；第2个适配子电路、第2个触发子电路、第2个调节子电路、第2个输出子电路构成第2个电流控制通道；第3个适配子电路、第3个触发子电路、第3个调节子电路、第3个输出子电路构成第3个电流控制通道；第4个适配子电路、第4个触发子电路、第4个调节子电路、第4个输出子电路构成第4个电流控制通道。当然，本发明的电流控制通道的数量还可以是2、6个等数量。 In this embodiment, the identification sensor adaptation circuit includes 4 adaptation subcircuits, the trigger input and trigger polarity selection circuit includes 4 trigger subcircuits, the output current intensity adjustment circuit includes 4 adjustment subcircuits, and the constant current generation and output The circuit includes 4 output sub-circuits; the first adaptation sub-circuit, the first trigger sub-circuit, the first adjustment sub-circuit, and the first output sub-circuit constitute the first current control channel; the second adaptation sub-circuit circuit, the second trigger sub-circuit, the second adjustment sub-circuit, and the second output sub-circuit constitute the second current control channel; the third adaptation sub-circuit, the third trigger sub-circuit, and the third adjustment sub-circuit circuit, the third output sub-circuit constitutes the third current control channel; the fourth adaptation sub-circuit, the fourth trigger sub-circuit, the fourth adjustment sub-circuit, and the fourth output sub-circuit constitute the fourth current control channel aisle. Of course, the number of current control channels in the present invention can also be 2, 6, etc.
本实施例可以通过标识传感器与调节电位器的配合，方便地调节输出电流的大小；标识传感器确定最大输出电流强度，调节电位器用于调节当前调节档位。比如，最大输出电流强度为8A，当前调节档位为50%，则输出的电流为4A。相对于现有技术，本发明可通过设置不同标识传感器，改变最大输出电流值（最大输出电流强度），一套电路，仅需插入不同标识传感器，即可得到不同的最大输出电流强度；而通过调节电位器设置当前调节档位的方法是现有技术，这里不在赘述。 In this embodiment, the size of the output current can be conveniently adjusted through the cooperation of the identification sensor and the adjustment potentiometer; the identification sensor determines the maximum output current intensity, and the adjustment potentiometer is used to adjust the current adjustment gear. For example, if the maximum output current intensity is 8A, and the current adjustment gear is 50%, the output current is 4A. Compared with the prior art, the present invention can change the maximum output current value (maximum output current intensity) by setting different identification sensors, and a set of circuits can obtain different maximum output current intensities only by inserting different identification sensors; The method of adjusting the potentiometer to set the current adjustment gear is the prior art, and will not be repeated here.
本实施例的恒流式控制器的其中一种优选参数如下： One of the preferred parameters of the constant flow controller of the present embodiment is as follows:
输入电压：DC26-28V，输入电流12A（最大）。 Input voltage: DC26-28V, input current 12A (maximum).
输出电压：DC24V（最大且随负载状态变化），输出电流—单路0.01A-6A。 Output voltage: DC24V (maximum and varies with load status), output current - single channel 0.01A-6A.
控制参数：在Rset1（Rset2）插口接入标识电阻，阻值1-6KΩ。相应阻值与输出最大电流匹配（1K=1A、2K=2A、…..6K=6A），而最小电流=最大电流/256，这里，可将最大电流划分为256个档位。阻值超出上述范围，输出电流值会出现不可控制现象。不插入标识电阻，控制器没电流输出。 Control parameters: Connect the identification resistor at the Rset1 (Rset2) socket, the resistance value is 1-6KΩ. The corresponding resistance value matches the maximum output current (1K=1A, 2K=2A, ... 6K=6A), and the minimum current=maximum current/256. Here, the maximum current can be divided into 256 gears. If the resistance value exceeds the above range, the output current value will be uncontrollable. If the identification resistor is not inserted, the controller has no current output.
其它插口：Iout1（Iout2）--输出接口。TrigIn—触发输入。Trig1Sele（Trig2Sele）--触发极性选择。SourseIn—电源输入。Rs232—与PC通讯接口。 Other sockets: Iout1 (Iout2) - output interface. TrigIn—trigger input. Trig1Sele (Trig2Sele) -- trigger polarity selection. SourceIn—power input. Rs232—communication interface with PC.
通讯协议与“数字调节电源带IO口通讯协议”兼容，但相关IO部分失效。面板使用方法与DP1024V等控制器相同。 The communication protocol is compatible with the "digital regulated power supply with IO port communication protocol", but the relevant IO part is invalid. The method of using the panel is the same as that of controllers such as DP1024V.
实施例2。 Example 2.
参见图7至图15，以下结合附图对本发明进行详细的描述。 Referring to Fig. 7 to Fig. 15, the present invention will be described in detail below in conjunction with the accompanying drawings.
本实施例的一种恒流式控制器，包括标识传感器适配电路、触发输入与触发极性选择电路、输出电流强度调节电路、恒定电流产生与输出电路；标识传感器适配电路的输入端与标识传感器连接，标识传感器适配电路的信号输出端与输出电流强度调节电路的信号输入端连接，输出电流强度调节电路的信号输出端与恒定电流产生与输出电路的电流信号输入端连接，触发输入与触发极性选择电路的信号输入端与触发源连接，触发输入与触发极性选择电路的信号输出端与恒定电流产生与输出电路的触发信号输入端连接； A constant current controller in this embodiment includes an identification sensor adaptation circuit, a trigger input and trigger polarity selection circuit, an output current intensity adjustment circuit, a constant current generation and output circuit; an input terminal of the identification sensor adaptation circuit and The identification sensor is connected, the signal output end of the identification sensor adaptation circuit is connected to the signal input end of the output current intensity adjustment circuit, the signal output end of the output current intensity adjustment circuit is connected to the current signal input end of the constant current generation and output circuit, and the trigger input The signal input end of the trigger polarity selection circuit is connected with the trigger source, and the trigger input is connected with the signal output end of the trigger polarity selection circuit with the trigger signal input end of the constant current generation and output circuit;
标识传感器适配电路识别标识传感器，并将识别信号发送到输出电流强度调节电路，输出电流强度调节电路根据识别信号确定最大输出电流值，输出电流强度调节电路根据最大输出电流值与当前调节档位确定当前输出电流值，并将当前输出电流值信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路根据该当前输出电流值信号确定当前输出电流强度；触发输入与触发极性选择电路接收到触发信号后，将触发信号发送到恒定电流产生与输出电路，恒定电流产生与输出电路接收到触发信号后对外输出恒定电流。 The identification sensor adaptation circuit identifies the identification sensor and sends the identification signal to the output current intensity adjustment circuit. The output current intensity adjustment circuit determines the maximum output current value according to the identification signal, and the output current intensity adjustment circuit determines the maximum output current value according to the current adjustment gear. Determine the current output current value, and send the current output current value signal to the constant current generation and output circuit, and the constant current generation and output circuit determines the current output current intensity according to the current output current value signal; the trigger input and trigger polarity selection circuit receive After the trigger signal is received, the trigger signal is sent to the constant current generation and output circuit, and the constant current generation and output circuit outputs a constant current after receiving the trigger signal.
其中，标识传感器适配电路包括传感器恒流供电电路和至少1个适配子电路；传感器恒流供电电路包括电阻R3，电容C23、C24，三端稳压二极管U8；适配子电路连接器J100，三极管Q100，双电压比较器U101B，运算放大器U1A，电阻R100、R101，电容C100，稳压二极管D100；Q100的型号为S9015，U101B的型号为LM393，U1A的型号为MC34072，R3的一端、U8的2脚、C23的一端、C24的负极与Vref端连接，R3的另一端与地连接，J100的1脚与Q100的集电极、D100的负极、C100的一端、U1A的3脚连接，Q100的集电极与Vref端连接，Q100的发射极与R100的一端连接，D100的正极与R101的一端、U101B的6脚连接，U101B的5脚与+2.5V电源连接，U101B的7脚与Vcon1端连接，U1A的2脚、U1A的1脚与Vref1端连接，J100的2脚、C100的另一端、R101的另一端、U1A的4脚与地连接，R100的另一端、U1A的8脚、U8的1脚、U8的3脚、C23的另一端、C24的正极与电源VDD连接。 Among them, the identification sensor adaptation circuit includes a sensor constant current power supply circuit and at least one adaptation sub-circuit; the sensor constant current power supply circuit includes a resistor R3, capacitors C23, C24, and a three-terminal voltage regulator diode U8; the adaptation sub-circuit connector J100 , transistor Q100, dual voltage comparator U101B, operational amplifier U1A, resistors R100, R101, capacitor C100, Zener diode D100; the model of Q100 is S9015, the model of U101B is LM393, the model of U1A is MC34072, one end of R3, U8 Pin 2 of C23, negative pole of C24 is connected to Vref terminal, the other end of R3 is connected to ground, pin 1 of J100 is connected to collector of Q100, negative pole of D100, one end of C100, pin 3 of U1A is connected, and pin 3 of U1A is connected to The collector is connected to the Vref terminal, the emitter of Q100 is connected to one end of R100, the positive pole of D100 is connected to one end of R101, the 6 pin of U101B is connected, the 5 pin of U101B is connected to the +2.5V power supply, and the 7 pin of U101B is connected to the Vcon1 terminal , Connect pin 2 of U1A, pin 1 of U1A to Vref1, pin 2 of J100, the other end of C100, the other end of R101, pin 4 of U1A to ground, the other end of R100, pin 8 of U1A, and U8 Pin 1, pin 3 of U8, the other end of C23, and the positive pole of C24 are connected to the power supply VDD.
本实施例具有2个电流控制通道，具有2个适配子电路，它们的结构相同，为便于阅读，它们的同样功能元器件的标号按一定规律变化，读者可结合附图理解变化规则。 This embodiment has 2 current control channels and 2 adapter sub-circuits. Their structures are the same. For the convenience of reading, the labels of their same functional components change according to certain rules. Readers can understand the changing rules in conjunction with the drawings.
标识传感器适配电路中：Rx00、Qx00、U8、C23、C24、R3组成标识传感器恒流供电电路，U1用作标识传感器的输入信号放大。Dx00、Rx01、Ux01B组成标识传感器接入状态识别电路（标识传感器未接入时则禁止输出）。见附图，x=1、2。 In the identification sensor adaptation circuit: Rx00, Qx00, U8, C23, C24, and R3 form the constant current power supply circuit of the identification sensor, and U1 is used for the input signal amplification of the identification sensor. Dx00, Rx01, and Ux01B form the identification circuit of the identification sensor access state (when the identification sensor is not connected, the output is prohibited). See attached picture, x=1,2.
触发输入与触发极性选择电路包括触发电平基准电路和至少1个触发子电路；触发电平基准电路包括运算放大器U3A，电阻R4、R5，电容C13、C14；触发子电路包括三端稳压二极管U101A，电阻R102、R103、R104、R105，单刀双掷开关JP100，电容C101，二极管D101，连接器J3；连接器J3的1脚与Trig1端连接，Trig1端与C101的一端连接、R102的一端、R103的一端，R103的另一端与JP100的动端连接，JP100的第1不动端与Trig1+端连接，JP100的第2不动端与Trig1-端连接，Trig1+端与R104的一端、D101的正极、U101A的3脚连接，Trig1-端与R105的一端、U101A的2脚连接，R104的另一端、R105的另一端与+2.5V电源连接，U101A的1脚与Vcon1端连接，C13的正极、C14的一端、R4的一端、R5的一端与U3A的3脚连接，U3A的2脚、U3A的1脚与+2.5V电源连接，R4的另一端与电源VCC连接，C13的负极、C14的另一端、R5的另一端、U3A的4脚、C101的另一端、U101A的4脚与地连接，U3A的8脚、R102的另一端、U101A的8脚与电源VDD连接。 The trigger input and trigger polarity selection circuit includes a trigger level reference circuit and at least one trigger subcircuit; the trigger level reference circuit includes an operational amplifier U3A, resistors R4, R5, and capacitors C13 and C14; the trigger subcircuit includes a three-terminal regulator Diode U101A, resistors R102, R103, R104, R105, SPDT switch JP100, capacitor C101, diode D101, connector J3; pin 1 of connector J3 is connected to Trig1, Trig1 is connected to one end of C101, and one end of R102 , one end of R103, the other end of R103 is connected to the moving end of JP100, the first fixed end of JP100 is connected to the Trig1+ end, the second fixed end of JP100 is connected to the Trig1- end, the Trig1+ end is connected to one end of R104, the D101 Positive, U101A’s 3-pin connection, Trig1-end is connected to one end of R105, U101A’s 2-pin connection, the other end of R104, the other end of R105 is connected to +2.5V power supply, U101A’s 1-pin is connected to Vcon1 end, and the positive pole of C13 , One end of C14, one end of R4, one end of R5 are connected to pin 3 of U3A, pin 2 of U3A, pin 1 of U3A are connected to +2.5V power supply, the other end of R4 is connected to the power supply VCC, the negative pole of C13, the negative pole of C14 The other end, the other end of R5, the 4 pins of U3A, the other end of C101, and the 4 pins of U101A are connected to the ground, the 8 pins of U3A, the other end of R102, and the 8 pins of U101A are connected to the power supply VDD.
触发输入与触发极性选择电路中：Rx02、Rx03、Cx01、Ux01A组成触发输入电路，Rx04、Rx05、JPx00组成触发极性选择电路，Dx01用作接收运算控制电路的开关控制指令；R4、R5、C13、C14、U3A组成触发电平基准电路。X=1、2。 In the trigger input and trigger polarity selection circuit: Rx02, Rx03, Cx01, Ux01A form the trigger input circuit, Rx04, Rx05, JPx00 form the trigger polarity selection circuit, Dx01 is used to receive the switch control instruction of the operation control circuit; R4, R5, C13, C14, and U3A form a trigger level reference circuit. X=1,2.
输出电流强度调节电路包括至少1个调节子电路；调节子电路包括数模转换器U102，可调电阻WR100，电阻R106，电容C102；U102的型号为TLV56XX，U102的1脚与DataIn端连接，U102的2脚与Clk端连接，U102的3脚与Cs1端连接，U102的6脚与RefIn1连接，U102的7脚与RefOut1连接，WR100的一端与Vref1端连接，WR100的滑动端与R106的一端连接，R106的另一端与RefIn1端、C102的一端连接，C102的另一端、WR100的另一端与地连接；TLV56XX表示TLV56系列元器件，比如TLV5636、TLV5639等。 The output current intensity adjustment circuit includes at least one adjustment sub-circuit; the adjustment sub-circuit includes a digital-to-analog converter U102, an adjustable resistor WR100, a resistor R106, and a capacitor C102; the model of U102 is TLV56XX, and pin 1 of U102 is connected to DataIn. Pin 2 of U102 is connected to Clk, pin 3 of U102 is connected to Cs1, pin 6 of U102 is connected to RefIn1, pin 7 of U102 is connected to RefOut1, one end of WR100 is connected to Vref1, and the sliding end of WR100 is connected to one end of R106 , the other end of R106 is connected to the RefIn1 end and one end of C102, the other end of C102 and the other end of WR100 are connected to the ground; TLV56XX means TLV56 series components, such as TLV5636, TLV5639, etc.
输出电流强度调节电路中：Ux02组成内部控制电流强度调节电路，WRx00、Rx06、Cx02组成标识传感器控制电流强度调节电路。X=1、2。 In the output current intensity adjustment circuit: Ux02 forms the internal control current intensity adjustment circuit, and WRx00, Rx06, and Cx02 form the identification sensor control current intensity adjustment circuit. X=1,2.
恒定电流产生与输出电路包括负压发生电路和至少1个输出子电路；负压发生电路包括极性反转电源转换器U6，电容C9、C10、C12；输出子电路包括运算放大器U100，三极管Q101，电阻R107、R108、R109、R110、R111、R112、R113、R114、R115，可调电阻WR101，电容C103、C104、C105、C111，连接器J102；U100的型号为UA741，Q101的型号为TIP142，U6的型号为ICL7660，U6的2脚与C9的正极连接，U6的4脚与C9的负极连接，U6的5脚与C10的负极、-5V电源连接，U6的8脚与C12的正极、电源VCC连接，C10的正极、C12的负极与地连接，R109的一端与RefOut1端连接，R109的另一端与Vcon1端、U100的3脚、R108的一端连接，U100的2脚与R110的一端、R107的一端、C103的一端连接，U100的4脚与-5V电源连接，U100的1脚与WR101的一端连接，U100的5脚与WR101的另一端连接，WR101的滑动端与-5V电源连接，U100的6脚与Q101的基极连接，U100的7脚、Q101的集电极与电源VDD连接，R108的另一端与R115的一端、R113的一端、R114的一端、R112的一端、C111的正极、C104的一端连接，R115的另一端、R113的另一端、R114的另一端、R107的另一端、C103的另一端与Q101的发射极连接，R112的另一端与C105的一端、R111的一端、OutCheck1端连接，R110的另一端、R111的另一端、C111的负极、C104的另一端连接，C105的另一端与地连接。 The constant current generating and output circuit includes a negative voltage generating circuit and at least one output sub-circuit; the negative voltage generating circuit includes a polarity inversion power converter U6, capacitors C9, C10, and C12; the output sub-circuit includes an operational amplifier U100, and a transistor Q101 , resistors R107, R108, R109, R110, R111, R112, R113, R114, R115, adjustable resistor WR101, capacitors C103, C104, C105, C111, connector J102; the model of U100 is UA741, the model of Q101 is TIP142, The model of U6 is ICL7660, the 2 pins of U6 are connected to the positive pole of C9, the 4 pins of U6 are connected to the negative pole of C9, the 5 pins of U6 are connected to the negative pole of C10, -5V power supply, the 8 pins of U6 are connected to the positive pole of C12, the power supply VCC connection, the positive pole of C10, the negative pole of C12 are connected to the ground, one end of R109 is connected to RefOut1, the other end of R109 is connected to Vcon1, pin 3 of U100, one end of R108, pin 2 of U100 is connected to one end of R110, R107 Connect one end of C103 to one end of C103, connect pin 4 of U100 to -5V power supply, connect pin 1 of U100 to one end of WR101, connect pin 5 of U100 to the other end of WR101, connect the sliding end of WR101 to -5V power supply, and connect U100 Pin 6 of U100 is connected to the base of Q101, pin 7 of U100 and collector of Q101 are connected to the power supply VDD, the other end of R108 is connected to one end of R115, one end of R113, one end of R114, one end of R112, the positive pole of C111, and the positive pole of C104 The other end of R115, the other end of R113, the other end of R114, the other end of R107, the other end of C103 is connected to the emitter of Q101, the other end of R112 is connected to one end of C105, one end of R111, OutCheck1 end Connection, the other end of R110, the other end of R111, the negative pole of C111, the other end of C104, and the other end of C105 is connected to the ground.
恒定电流产生与输出电路中：Rx07、Rx08、Rx09、Rx10、Rx13、Rx14、Rx15、Cx03、Ux00、Qx01组成恒流电路，输出电流= (V / Rs) * (Ra/ Rb)，其中V=RefOutx点的对地电压、Rs=Rx13//Rx14//Rx15、Ra=Rx08、Rb=Rx09。在Ra、Rb、Rs固定的情况下，通过改变不同的V值，就能得到不同的电流输出值。U6、C9、C10、C12组成负压发生电路，以满足Ux00的工作需要。Rx11、Rx12用作系统检测该模块的工作状态使用。X=1、2。 In the constant current generation and output circuit: Rx07, Rx08, Rx09, Rx10, Rx13, Rx14, Rx15, Cx03, Ux00, Qx01 form a constant current circuit, the output current = (V / Rs) * (Ra/ Rb), where V= Ground voltage at RefOutx point, Rs=Rx13//Rx14//Rx15, Ra=Rx08, Rb=Rx09. When Ra, Rb, and Rs are fixed, different current output values can be obtained by changing different V values. U6, C9, C10, and C12 form a negative pressure generating circuit to meet the working needs of Ux00. Rx11 and Rx12 are used by the system to detect the working status of the module. X=1,2.
其中，还包括用于控制恒流电源输出的运算控制电路、用于接口适配的上位机通讯接口电路、用于操作设置的用户接口电路。 Among them, it also includes an arithmetic control circuit for controlling the output of the constant current power supply, a host computer communication interface circuit for interface adaptation, and a user interface circuit for operation setting.
用户接口电路包括型号为STC5402的单片机U1、开关S1、S2、S3；S1的一端与U1的8脚连接，S2的一端与U1的9脚连接，S3的一端与U1的10脚连接，S1的另一端、S2的另一端、S3的另一端接地。 The user interface circuit includes a single-chip microcomputer U1 of the model STC5402, switches S1, S2, and S3; one end of S1 is connected to pin 8 of U1, one end of S2 is connected to pin 9 of U1, one end of S3 is connected to pin 10 of U1, and the end of S1 is connected to pin 8 of U1. The other end, the other end of S2, and the other end of S3 are grounded.
用户接口电路；按键S1、S2、S3、数码显示管SEG1、发光管LED1、LED3构成用户界面。U1是处理接口事务的智能芯片。用户可以通过按键去设定控制器的输出，通过SEG1、LED1、LED3去监测控制器的运行状态。 User interface circuit; buttons S1, S2, S3, digital display tube SEG1, light-emitting tubes LED1, LED3 constitute the user interface. U1 is the smart chip that handles the interface. The user can set the output of the controller through the buttons, and monitor the operating status of the controller through SEG1, LED1, and LED3.
运算控制电路包括单片机U2，晶振Y1，电阻R1，电容C1、C3、C4，二极管D1；U2的型号为STC12c2054AD，Y1的一端与U2的4脚、C1的一端连接，Y1的另一端与U2的5脚、C3的一端连接，R1的一端与D1的负极、U2的1脚、C4的负极连接，C4的正极与电源VCC连接，R1的另一端、D1的正极、C1的另一端、C3的另一端与地连接。 The operation control circuit includes single-chip microcomputer U2, crystal oscillator Y1, resistor R1, capacitors C1, C3, C4, and diode D1; the model of U2 is STC12c2054AD, one end of Y1 is connected to pin 4 of U2 and one end of C1, and the other end of Y1 is connected to the 5 feet, one end of C3 is connected, one end of R1 is connected to the negative pole of D1, 1 pin of U2, and the negative pole of C4, the positive pole of C4 is connected to the power supply VCC, the other end of R1, the positive pole of D1, the other end of C1, and the Connect the other end to ground.
运算控制电路：R1、C1、D4组成智能芯片的启动复位电路；C1、C3、Y1提供时间基准频率。连接器J1用作与用户接口电路连接。智能芯片U2为系统的中央处理器。 Operation control circuit: R1, C1, and D4 form the start-up and reset circuit of the smart chip; C1, C3, and Y1 provide the time reference frequency. Connector J1 is used to connect with the user interface circuit. The intelligent chip U2 is the central processing unit of the system.
上位机通讯接口电路包括兼容RS232标准的芯片U5，连接器J2，电容C5、C6、C7、C8、C11，瞬变二极管RV1、RV2；U5的型号为MAX232，RV1和RV2的型号为P4KE13CA，J2的1脚与U5的14脚连接，J2的2脚与U5的13脚连接，C5连接在U5的1脚与U5的3脚之间，C7连接在U5的4脚与U5的5脚之间，C11连接在U5的15脚与U5的16脚之间，U5的2脚与C6的一端连接，U5的6脚与C8的一端连接，C6的另一端、C8的另一端与地连接。 The upper computer communication interface circuit includes chip U5 compatible with RS232 standard, connector J2, capacitors C5, C6, C7, C8, C11, transient diodes RV1, RV2; the model of U5 is MAX232, the model of RV1 and RV2 is P4KE13CA, J2 Pin 1 of U5 is connected to pin 14 of U5, pin 2 of J2 is connected to pin 13 of U5, C5 is connected between pin 1 of U5 and pin 3 of U5, C7 is connected between pin 4 of U5 and pin 5 of U5 , C11 is connected between pin 15 of U5 and pin 16 of U5, pin 2 of U5 is connected to one end of C6, pin 6 of U5 is connected to one end of C8, the other end of C6 and the other end of C8 are connected to ground.
上位机通讯接口电路：C5、C6、C7、C8、U5、J2为通讯接口适配电路。RV1、RV2保护通讯电路免受通讯线路上过电压的损坏。 Upper computer communication interface circuit: C5, C6, C7, C8, U5, J2 are communication interface adaptation circuits. RV1 and RV2 protect the communication circuit from being damaged by overvoltage on the communication line.
其中，还包括用于提供电源的电源分配电路；电源分配电路包括三端稳压器U7，运算放大器U3B，连接器J4、J5，三极管Q1，二极管D4、D5，电容C15、C16、C17、C18、C19、C20，可调电阻WR1；U7的型号为LM7805CT，U3B的型号为MC34072，Q1的型号为TIP142，U7的1脚连接+24V电源，U7的3脚连接电源VCC、C15正极，J4的1脚、J4的2脚连接+24V电源，C18的正极、C19的一端、WR1的一端、Q1的发射极、D4的正极与+24V电源连接，D4的负极与Q1的集电极、电源VDD连接，Q1的基极与C20的一端、U3B的7脚连接，U3B的6脚与C20的另一端、WR1的滑动端连接，U3B的5脚与+2.5V电源连接，C16的一端、C17的正极、D5的负极、J5的1脚、J5的2脚、J5的3脚与电源VDD连接，J5的4脚、J5的5脚、J5的6脚、C16的另一端、C17的负极、D5的正极、WR1的另一端、C19的另一端、C18的负极、C15的负极与地连接。 Among them, it also includes a power distribution circuit for providing power; the power distribution circuit includes a three-terminal voltage regulator U7, an operational amplifier U3B, connectors J4, J5, transistor Q1, diodes D4, D5, capacitors C15, C16, C17, C18 , C19, C20, adjustable resistor WR1; the model of U7 is LM7805CT, the model of U3B is MC34072, the model of Q1 is TIP142, the 1 pin of U7 is connected to the +24V power supply, the 3 pins of U7 are connected to the power supply VCC, the positive pole of C15, the J4 Pin 1 and pin 2 of J4 are connected to +24V power supply, the positive pole of C18, one end of C19, one end of WR1, the emitter of Q1, the positive pole of D4 are connected to +24V power supply, the negative pole of D4 is connected to the collector of Q1 and the power supply VDD , the base of Q1 is connected to one end of C20 and pin 7 of U3B, the 6 pin of U3B is connected to the other end of C20 and the sliding end of WR1, the 5 pin of U3B is connected to +2.5V power supply, one end of C16, the positive pole of C17 , the negative pole of D5, the 1 pin of J5, the 2 pins of J5, the 3 pins of J5 are connected to the power supply VDD, the 4 pins of J5, the 5 pins of J5, the 6 pins of J5, the other end of C16, the negative pole of C17, the The positive pole, the other end of WR1, the other end of C19, the negative pole of C18, and the negative pole of C15 are connected to the ground.
电源分配电路：向各模块提供符合使用要求的电压源。D4、Q1、U3B、C18、C19、C20、WR1构成24V稳压电路，供电给系统冷却风扇。U7、C15构成5V稳压电路，供电给系统控制部分。D5起着防止输入反接的功能。 Power distribution circuit: Provide voltage sources that meet the requirements of use to each module. D4, Q1, U3B, C18, C19, C20, and WR1 form a 24V voltage regulator circuit to supply power to the system cooling fan. U7 and C15 constitute a 5V voltage regulator circuit, supplying power to the system control part. D5 plays the function of preventing the reverse connection of the input.
其中，标识传感器适配电路包括2个适配子电路，触发输入与触发极性选择电路包括2个触发子电路，输出电流强度调节电路包括2个调节子电路，恒定电流产生与输出电路包括2个输出子电路；第1个适配子电路、第1个触发子电路、第1个调节子电路、第1个输出子电路构成第1个电流控制通道；第2个适配子电路、第2个触发子电路、第2个调节子电路、第2个输出子电路构成第2个电流控制通道。当然，本发明的电流控制通道的数量还可以是2、6个等数量。 Among them, the identification sensor adaptation circuit includes 2 adaptation sub-circuits, the trigger input and trigger polarity selection circuit includes 2 trigger sub-circuits, the output current intensity adjustment circuit includes 2 adjustment sub-circuits, and the constant current generation and output circuit includes 2 output sub-circuit; the first adaptation sub-circuit, the first trigger sub-circuit, the first regulation sub-circuit, and the first output sub-circuit form the first current control channel; the second adaptation sub-circuit, the first output sub-circuit The 2 triggering sub-circuits, the 2nd regulating sub-circuit and the 2nd outputting sub-circuit constitute the 2nd current control channel. Of course, the number of current control channels in the present invention can also be 2, 6, etc.
本实施例可以通过标识传感器与计算机的配合，或者标识传感器与用户接口电路的配合，或者标识传感器与计算机、用户接口电路的配合，方便地调节输出电流的大小。标识传感器确定最大输出电流强度，计算机、用户接口电路用于调节当前调节档位，算机、用户接口电路可发出调节当前调节档位的指令。当前调节档位为当前输出占最大输出电流强度的百分比。 In this embodiment, the magnitude of the output current can be conveniently adjusted through the cooperation between the identification sensor and the computer, or the cooperation between the identification sensor and the user interface circuit, or the cooperation between the identification sensor and the computer or the user interface circuit. The identification sensor determines the maximum output current intensity, the computer and the user interface circuit are used to adjust the current adjustment gear, and the computer and the user interface circuit can issue an instruction to adjust the current adjustment gear. The current adjustment gear is the percentage of the current output to the maximum output current intensity.
需要说明的是，本具体实施方式及说明书附图的电子元器件参数仅供参考，本技术领域普通技术人员在实际实施本发明时，无需创造性劳动的修改均属于本发明保护的范围。 It should be noted that the parameters of the electronic components in the specific implementation mode and the drawings of the specification are for reference only, and those skilled in the art can make modifications without creative labor when implementing the present invention in practice, and all belong to the scope of protection of the present invention.
以上内容仅为本发明的较佳实施例，对于本领域的普通技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，本说明书内容不应理解为对本发明的限制。 The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.
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| US5222164A (en) * | 1992-08-27 | 1993-06-22 | International Business Machines Corporation | Electrically isolated optical connector identification system |
| CN2553413Y (en) * | 2002-07-12 | 2003-05-28 | 成都彩虹电器（集团）股份有限公司 | Digital program controller for domestic flexible electric heater |
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