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CN100590677C - Thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor variable characteristic demonstrator - Google Patents

Thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor variable characteristic demonstrator Download PDF

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CN100590677C
CN100590677C CN200810023861A CN200810023861A CN100590677C CN 100590677 C CN100590677 C CN 100590677C CN 200810023861 A CN200810023861 A CN 200810023861A CN 200810023861 A CN200810023861 A CN 200810023861A CN 100590677 C CN100590677 C CN 100590677C
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resistor
thermistor
sensitive resistor
pin
integrated circuit
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CN101261777A (en
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葛宇宏
郝杰
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Nanjing Polytechnic Institute
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Abstract

本发明涉及一种电阻可变特性演示仪，特别涉及热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻可变特性演示仪。电路由欧姆表、转换开关、热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻、555集成电路、电阻、电容和发光二极管组成，其特征是：热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻和欧姆表并联后的一端接直流电源的正极，另一端通过转换开关和电阻接555集成电路的2脚和6脚，可变电阻的一端接转换开关，另一端接直流电源的负极，由于采用上述技术方案，本发明所具有的优点和积极效果是：能通过欧姆表读数的变化和发光二极管的工作状态演示热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻的可变特性，直观性强，造价也不高。

Figure 200810023861

The invention relates to a variable characteristic demonstration instrument of resistance, in particular to a variable characteristic demonstration instrument of a thermistor, a photosensitive resistor, a force sensitive resistor, a humidity sensitive resistor and a magnetic sensitive resistor. The circuit is composed of ohmmeter, transfer switch, thermistor, photoresistor, force-sensitive resistor, humidity-sensitive resistor, magneto-resistor, 555 integrated circuit, resistor, capacitor and light-emitting diode. It is characterized by: thermistor, photoresistor, One end of force sensitive resistor, humidity sensitive resistor, magnetoresistor and ohmmeter connected in parallel is connected to the positive pole of DC power supply, the other end is connected to pin 2 and pin 6 of 555 integrated circuit through the transfer switch and resistor, and one end of the variable resistor is connected to the transfer switch , the other end is connected to the negative pole of the DC power supply. Due to the adoption of the above-mentioned technical scheme, the advantages and positive effects of the present invention are: the thermistor, photoresistor, and force-sensitive resistor can be demonstrated through the change of the ohmmeter reading and the working state of the light-emitting diode. , Humidistor, magneto-resistor variable characteristics, strong intuitive, low cost.

Figure 200810023861

Description

热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻可变特性演示仪 Thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor variable characteristic demonstrator

所属技术领域 Technical field

本发明涉及一种电阻可变特性演示仪，特别涉及热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻可变特性演示仪。The invention relates to a variable characteristic demonstration instrument of resistance, in particular to a variable characteristic demonstration instrument of a thermistor, a photosensitive resistor, a force sensitive resistor, a humidity sensitive resistor and a magnetic sensitive resistor.

背景技术 Background technique

目前，在电子线路教学中，讲授热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻的可变特性时，没有演示仪器演示，学生不能直观地了解其可变特性。At present, in the teaching of electronic circuits, when teaching the variable characteristics of thermistors, photoresistors, force-sensitive resistors, humidity-sensitive resistors, and magnetoresistors, there is no demonstration instrument demonstration, and students cannot intuitively understand their variable characteristics.

发明内容 Contents of the invention

本发明的目的是提供一种热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻可变特性演示仪，能通过欧姆表读数的变化和发光二极管的工作状态演示热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻的可变特性。The object of the present invention is to provide a kind of thermistor, photosensitive resistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor variable characteristic demonstrator, can demonstrate thermistor, Variable characteristics of photoresistors, force-sensitive resistors, humidity-sensitive resistors, and magnetoresistors.

本发明的目的是这样实现的：电路由欧姆表、转换开关、热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻、555集成电路、电阻、电容和发光二极管组成，555集成电路的4脚和8脚接直流电源的正极，555集成电路的1脚接直流电源的负极，555集成电路的5脚通过电容接直流电源的负极，555集成电路的3脚和直流电源正极之间接发光二极管，555集成电路的2脚和6脚相连后通过电容接直流电源的负极，开关和电源串联，其特征是：热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻和欧姆表并联后的一端接直流电源的正极，另一端通过转换开关和电阻接555集成电路的2脚和6脚，可变电阻的一端接转换开关，另一端接直流电源的负极，欧姆表、发光二极管、热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻、转换开关、可变电阻和开关置于演示板的正面，555集成电路等原件固定在演示板的反面，演示板垂直固定在底座上。The purpose of the present invention is achieved like this: the circuit is made up of ohmmeter, transfer switch, thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor, 555 integrated circuit, resistance, capacitor and light-emitting diode, 555 integrated circuit Pin 4 and pin 8 of the circuit are connected to the positive pole of the DC power supply, pin 1 of the 555 integrated circuit is connected to the negative pole of the DC power supply, pin 5 of the 555 integrated circuit is connected to the negative pole of the DC power supply through a capacitor, and pin 3 of the 555 integrated circuit is connected to the positive pole of the DC power supply Indirect light-emitting diodes, 555 integrated circuit pins 2 and 6 are connected to the negative pole of the DC power supply through a capacitor, and the switch is connected in series with the power supply. One end of the parallel connection with the ohmmeter is connected to the positive pole of the DC power supply, and the other end is connected to pins 2 and 6 of the 555 integrated circuit through a transfer switch and a resistor. One end of the variable resistor is connected to the transfer switch, and the other end is connected to the negative pole of the DC power supply. , Light-emitting diodes, thermistors, photoresistors, force-sensitive resistors, humidity-sensitive resistors, magnetoresistors, transfer switches, variable resistors and switches are placed on the front of the demo board, and 555 integrated circuits and other components are fixed on the reverse side of the demo board. The demo board is mounted vertically on the base.

由于采用上述技术方案，本发明所具有的优点和积极效果是：能通过欧姆表读数的变化和发光二极管的工作状态演示热敏电阻、光敏电阻、力敏电阻、湿敏电阻、磁敏电阻的可变特性，直观性强，造价也不高。Owing to adopting above-mentioned technical scheme, the advantage that the present invention has and positive effect are: can demonstrate thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetic sensitive resistor by the change of ohmmeter reading and the working state of light-emitting diode Variable characteristics, strong intuitiveness, and low cost.

附图说明 Description of drawings

下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

图1是本发明的电路原理图。Fig. 1 is the schematic circuit diagram of the present invention.

图2是本发明实施例的结构示意图。Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

图中R1.热敏电阻  R2.光敏电阻  R3.力敏电阻  R4.湿敏电阻R5.磁敏电阻  R6.电阻  R7.可变电阻  C1.电容  C2.电容B.转换开关  V.欧姆表  I.555集成电路  G.发光二极管E.电源  K.开关  1.演示板  2.底座  3.底脚R 1 . Thermistor R 2 . Photosensitive resistor R 3 . Force sensitive resistor R 4 . Humidity sensitive resistor R 5 . Magnetic resistor R 6 . Resistor R 7 . Variable resistor C 1 . Capacitor C 2 . Capacitor B .Transfer switch V. Ohmmeter I.555 integrated circuit G. Light-emitting diode E. Power supply K. Switch 1. Demonstration board 2. Base 3. Feet

具体实施方式 Detailed ways

在图1中，555集成电路(I)的4脚和8脚接直流电源的正极，555集成电路(I)的1脚接直流电源的负极，555集成电路(I)的5脚通过电容(C2)接直流电源的负极，555集成电路(I)的3脚和直流电源正极之间接发光二极管(G)，555集成电路(I)的2脚和6脚相连后通过电容(C1)接直流电源的负极，开关(K)和电源(E)串联，热敏电阻(R1)、光敏电阻(R2)、力敏电阻(R3)、湿敏电阻(R4)、磁敏电阻(R5)和欧姆表(V)并联后的一端接直流电源的正极，另一端通过转换开关(B)和电阻(R6)接555集成电路(I)的2脚和6脚，可变电阻(R7)的一端接转换开关(B)，另一端接直流电源的负极。In Fig. 1, pin 4 and pin 8 of the 555 integrated circuit (I) are connected to the positive pole of the DC power supply, pin 1 of the 555 integrated circuit (I) is connected to the negative pole of the DC power supply, and pin 5 of the 555 integrated circuit (I) passes through a capacitor ( C 2 ) is connected to the negative pole of the DC power supply, and the light-emitting diode (G) is connected between the 3-pin of the 555 integrated circuit (I) and the positive pole of the DC power supply, and the 2-pin and 6-pin of the 555 integrated circuit (I) are connected through a capacitor (C 1 ) Connect the negative pole of the DC power supply, switch (K) and power supply (E) in series, thermistor (R 1 ), photoresistor (R 2 ), force-sensitive resistor (R 3 ), humidity-sensitive resistor (R 4 ), magnetic sensor One end of the resistance (R 5 ) and ohmmeter (V) connected in parallel is connected to the positive pole of the DC power supply, and the other end is connected to pin 2 and pin 6 of the 555 integrated circuit (I) through the transfer switch (B) and the resistor (R 6 ). One end of the variable resistance (R 7 ) is connected to the transfer switch (B), and the other end is connected to the negative pole of the DC power supply.

在图2中，555集成电路(I)等原件固定在演示板(1)的反面，演示板(1)垂直固定在底座(2)上，底座(2)下面四角有底脚(3)，欧姆表(V)、发光二极管(G)、热敏电阻(R1)、光敏电阻(R2)、力敏电阻(R3)、湿敏电阻(R4)、磁敏电阻(R5)、转换开关(K)、可变电阻(R7)和开关(K)置于演示板(1)的正面。In Fig. 2, the originals such as 555 integrated circuits (1) are fixed on the opposite side of the demonstration board (1), and the demonstration board (1) is vertically fixed on the base (2), and the four corners below the base (2) have feet (3), Ohmmeter (V), LED (G), Thermistor (R 1 ), Photoresistor (R 2 ), Force Resistor (R 3 ), Humidistor (R 4 ), Magnetic Resistor (R 5 ) , changeover switch (K), variable resistor (R 7 ) and switch (K) are placed on the front side of the demo board (1).

Claims (2)

1. a thermistor, photoresistance, force sensing resistance, hygristor, mistor variable characteristic demonstrator, circuit is made up of ohmmeter, switch, thermistor, photoresistance, force sensing resistance, hygristor, mistor, 555 integrated circuit, resistance, electric capacity and light emitting diode, 4 pin of 555 integrated circuit (I) and 8 pin connect the positive pole of direct supply, 1 pin of 555 integrated circuit (I) connects the negative pole of direct supply, and 5 pin of 555 integrated circuit (I) are by electric capacity (C 2) connecing the negative pole of direct supply, sending and receiving optical diode (G) between 3 pin of 555 integrated circuit (I) and the dc power anode, 2 pin of 555 integrated circuit (I) link to each other the back by electric capacity (C with 6 pin 1) connecing the negative pole of direct supply, switch (K) and power supply (E) series connection is characterized in that: thermistor (R 1), photoresistance (R 2), force sensing resistance (R 3), hygristor (R 4), mistor (R 5) and ohmmeter (V) parallel connection after the positive pole of a termination direct supply, the other end is by switch (B) and resistance (R 6) connect 2 pin and 6 pin of 555 integrated circuit (I), variable resistor (R 7) a termination switch (B), the negative pole of another termination direct supply.
2. a kind of thermistor according to claim 1, photoresistance, force sensing resistance, hygristor, mistor variable characteristic demonstrator is characterized in that: ohmmeter (V), light emitting diode (G), thermistor (R 1), photoresistance (R 2), force sensing resistance (R 3), hygristor (R 4), mistor (R 5), switch (K), variable resistor (R 7) and switch (K) place the front of demonstration board (1).
CN200810023861A 2008-04-18 2008-04-18 Thermistor, photoresistor, force sensitive resistor, humidity sensitive resistor, magnetoresistor variable characteristic demonstrator Expired - Fee Related CN100590677C (en)

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Publication number Priority date Publication date Assignee Title
CN101800002B (en) * 2010-03-16 2011-08-03 盐城师范学院 Ceramic Humidity Sensor Humidity Sensing Characteristics Demonstration Instrument
CN101826268B (en) * 2010-04-27 2012-03-28 盐城师范学院 Semiconductor Magnetic Sensitive Sensor Characteristic Demonstration Instrument
CN102339543A (en) * 2010-07-23 2012-02-01 南京化工职业技术学院 Thermistor characteristic demonstrator
CN102214406A (en) * 2011-06-09 2011-10-12 盐城师范学院 Body pyroelectric infrared sensor and Fresnel lens combined control circuit demonstrator
CN102222439A (en) * 2011-06-28 2011-10-19 南京化工职业技术学院 Demonstrating instrument for automatic control circuit of common photoelectric device
CN102436774A (en) * 2011-12-26 2012-05-02 盐城师范学院 Humidity sensing characteristic demonstrator of inorganic electrolyte type humidity sensor
CN102881210A (en) * 2012-10-30 2013-01-16 南京化工职业技术学院 Humidity sensing characteristic demonstrator for humidity sensor
CN105741655A (en) * 2016-05-08 2016-07-06 商洛学院 Sensor integrated demonstration instrument

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Address after: 225752 science and Technology Office of people's Government of West abalone Township, Taizhou, Xinghua, Jiangsu

Patentee after: Nanjing College of Chemical Technology

Address before: 210048 Jiangsu city of Nanjing province Dachang geguan Road No. 625

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