CN209103670U - A kind of photoelectrical coupler mileometer experimental provision - Google Patents

Abstract

The utility model belongs to experimental provision technical field, more particularly to a kind of novel photoelectric coupler mileometer experimental provision.Including ROTATING SOURCE part and measurement part, the ROTATING SOURCE part includes turntable, motor and motor speed control circuit, and motor speed control circuit is electrically connected the revolving speed for controlling motor with motor；The output axis connection of turntable and motor；The measurement portion point includes photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and single-chip microcontroller；Photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer are separately connected on single-chip microcontroller；The core element acquired by photoelectrical coupler as revolving speed, then by the simple computation of single-chip microcontroller come more intuitive real-time display revolving speed and mileage information, structure is simpler, and mileage measurement is more accurate.

Description

A kind of photoelectrical coupler mileometer experimental provision

Technical field

The utility model belongs to experimental provision technical field, tests more particularly to a kind of novel photoelectric coupler mileometer Device.

Background technique

With the progress of society and the improvement of people's living standards, automobile has spread to huge numbers of families, speedometer is One of essential important instrument of automobile, provides vehicle current vehicle speed and mileage information for driver.In currently on the market Journey table can be divided into mechanical and two kinds of electronic type according to working principle, used at present based on electronic type.Electronic type mileage The speed signal of table is provided by the vehicle speed sensor being mounted on gearbox, and sensor believes the revolving speed sensed from gearbox Number it is converted into the manageable pulse signal of single-chip microcontroller in instrument, single-chip microcontroller after pulse signal calculation processing again driving instrument to show Show that mechanism shows current mileage.Mileometer is digital-scroll technique, and mileage subtotal can be taking human as clearing, but mileage amounts to Recording the total kilometrage travelled after vehicle factory cannot reset.Vehicle speed sensor is divided into contact and non-contact according to mounting means Formula.Since touch sensor is easily damaged relatively conventional for non-contact vehicle speed sensor on cars on hand, i.e., sensor is pacified Outside gearbox driving wheel gear ring.

Industrial detection, electric signal transmission processing and computer system in, commonly use relay, pulse transformer and complexity Circuit realize being isolated between input, output end device and host, switch, matching and the functions such as anti-interference.And relay Slow motion has contact work unreliable；Volume of transformer is big, and frequency band is narrow, so they are not ideal mileometer design portions Part.The prior art is wanted to learn the principle of mileometer in middle school student, or carries out the experiment of mileometer, can only be using the instrument in reality Device equipment, structure is complicated, higher cost.

Utility model content

The utility model provides a kind of novel photoelectric coupler mileometer experimental provision.

Specific technical solution is, the photoelectrical coupler mileometer experimental provision includes ROTATING SOURCE part and measurement part, The ROTATING SOURCE part includes turntable, motor and motor speed control circuit, and motor speed control circuit is electrically connected with motor for controlling electricity The revolving speed of machine；The output axis connection of turntable and motor is measured for revolving speed of the subsidiary part to motor；The measurement Part includes photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and single-chip microcontroller；On single-chip microcontroller respectively Connect photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer；The alignment probe motor of photoelectrical coupler Connect the hole setting on turntable；The photoelectrical coupler be correlation photoelectrical coupler.The photoelectrical coupler is for acquiring Motor speed value, and convert optical signal into electric signal and be input to single-chip microcontroller, after single-chip microcontroller simple computation, pass through LCD1602 liquid crystal comes the current speed of real-time display and mileage, and when speed is more than preset value, single-chip microcontroller can be sent to buzzer Enabling signal, AT24C02 memory are used to store the mileage information of acquisition.

In use, first the output end of motor-drive circuit is connected on the circuit interface of motor, then by photoelectricity coupling Clutch probe is placed on the top of motor connection turntable, is aligned and is close to the hole on turntable.There are 6 holes on general turntable, and it is each Hole makes the photosignal of photoelectrical coupler change by photoelectrical coupler Shi Douhui, and then exports pulse, and works as monolithic Machine receives 6 pulses and just illustrates that turntable has rotated one week, thus can revolving speed in the unit of account time, and then in conjunction with turning The diameter of disk completes the calculating of mileage.

USB interface is had on the single-chip microcontroller, can be connect by this USB interface with PC machine and be carried out data transmission and lead to Letter, PC machine can the program to single-chip microcontroller carry out debugging and burning.

R7 is the current-limiting resistance of infrared transmitting tube in the circuit of photoelectrical coupler, adjusts W2 for adjusting the power that shines, R9 It is the load resistance of light-sensitive device with W3, adjusts W3 for adjusting detectivity, LED is used to refer to switch state.

Beneficial effect, by the combination of photoelectrical coupler and single-chip microcontroller, to simulate the measurement of mileometer, to realize non- The measurement of contact speed and mileage, to make that photoelectrical coupler mileometer experimental provision volume is smaller, structure is simpler, anti- Answer that speed is fast, precision is higher, durability is also stronger, easily facilitates student and understands its structural principle；Pass through USB interface on single-chip microcontroller Setting to connect whole device with PC machine more convenient.

Detailed description of the invention

In order to illustrate more clearly of the technical solution of the utility model, attached drawing needed for embodiment description will be made below It is simple to introduce, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention, common to this field For technical staff, without creative efforts, it can also be obtained according to these attached drawings other attached drawings, these The technical solution that attached drawing is directly obtained should also belong to the protection scope of the utility model.

Fig. 1 is the structural block diagram of photoelectrical coupler mileometer experimental provision described in the utility model.

Fig. 2 is the circuit structure diagram of photoelectrical coupler described in the utility model.

Fig. 3 is the structure chart of motor speed control circuit described in the utility model.

Specific embodiment

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below to the utility model Specific embodiment elaborate.It is practical in order to fully understand to be explained in the following description many details It is novel.But the utility model can be implemented with being much different from other way described herein, those skilled in the art can To do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public specific reality Apply the limitation of mode.

Photoelectric coupled device have be electrically isolated, one-way passes elm, anti-interference, fast response time, easy to use, and have one As the reliability of solid state device, small in size, light-weight, antidetonation, sealing waterproof, performance stabilization, power consumptive province, it is at low cost the advantages that. Electric signal is converted optical signals to, non-contact measurement can be carried out to speed or mileage well, to increase electronics vehicle Stability, safety and the durability of fast mileometer.In order to better exercise student ' to the structural principle of speedometer It has carried out more abundant and has understood, the utility model provides a kind of photoelectrical coupler mileometer experimental provision.

Photoelectrical coupler is divided into correlation and two kinds reflective, the infrared emission direct irradiation of correlation photoelectrical coupler again Light-sensitive device, the infrared emission of reflecting photoelectric coupler need to block to make infrared light reflection to light by object before switching On sensing device.The application uses correlation photoelectrical coupler measurement movement mileage.

Embodiment 1, as shown in Figure 1, the photoelectrical coupler mileometer experimental provision includes ROTATING SOURCE part and measurement portion Point, ROTATING SOURCE part is used to provide the rotation of motor, and measurement part is used to calculate output to the revolving speed and vehicle mileage of motor.Institute Stating ROTATING SOURCE part includes turntable, motor and motor speed control circuit, and motor speed control circuit is electrically connected with motor for controlling motor Revolving speed；The output axis connection of turntable and motor measures, general turntable for revolving speed of the subsidiary part to motor On have 6 holes；The measurement portion point including photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and Single-chip microcontroller；Be separately connected on single-chip microcontroller photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and；Photoelectricity Hole setting on the alignment probe motor connection turntable of coupler, because there is 6 holes on turntable, and photoelectricity coupling is being passed through in each hole Clutch Shi Douhui makes the photosignal of photoelectrical coupler change, and then photoelectrical coupler is according to the change of the optical signal received Change output pulse to single-chip microcontroller, when single-chip microcontroller receives 6 pulses, just illustrate that turntable has rotated one week, that is, motor rotation Turned one week, thus can revolving speed in the unit of account time, and then in conjunction with the straight of the diameter of turntable wheel of the bus in other words The calculating of diameter completion mileage.Wherein the calculating of single-chip microcontroller only relates to simple computation in the prior art, is not related to calculating side The improvement of method.Photoelectrical coupler is divided into correlation and two kinds reflective again, and the infrared emission of correlation photoelectrical coupler is directly shone Light-sensitive device is penetrated, the infrared emission of reflecting photoelectric coupler needs to block to arrive infrared light reflection by object before switching On light-sensitive device.Therefore correlation photoelectrical coupler is used in the application.The photoelectrical coupler is specifically used for acquisition motor and turns Speed value, and convert optical signal into electric signal and be input to single-chip microcontroller, after single-chip microcontroller simple computation, pass through LCD1602 liquid Crystalline substance comes the current speed of real-time display and mileage, and when speed is more than preset value, single-chip microcontroller can send enabling signal to buzzer, AT24C02 memory is for storing the mileage information and revolving speed that treated.When specifically used, first by the defeated of motor-drive circuit Outlet is connected on the circuit interface of motor, and then photoelectrical coupler probe is placed on motor connection turntable, is aligned and tight Paste the hole on turntable.Because there is 6 holes on turntable, and each hole is in the light for making photoelectrical coupler by photoelectrical coupler Shi Douhui Electric signal changes, and then exports pulse, and just illustrates that turntable has rotated one week when single-chip microcontroller receives 6 pulses, thus Can revolving speed in the unit of account time, and then complete in conjunction with the diameter of turntable the calculating of mileage.By photoelectrical coupler with The combination of single-chip microcontroller, to simulate the measurement of mileometer, so that the measurement of contactless speed and mileage is realized, to make photoelectricity Coupler mileometer experimental provision volume is smaller, structure is simpler, reaction speed is fast, precision is higher, and durability is also stronger, more Add and understands its structural principle convenient for student.

It goes based on the above technical solution, is additionally provided with USB interface on the single-chip microcontroller, this USB interface can be passed through Connect with PC machine and carry out data transmission and communicate, PC machine can the program to single-chip microcontroller carry out debugging and burning.

Embodiment 2, as shown in Figure 1-Figure 3, the photoelectrical coupler mileometer experimental provision include ROTATING SOURCE part and survey Measure part, the ROTATING SOURCE part includes turntable, motor and motor speed control circuit, motor speed control circuit be electrically connected with motor for Control the revolving speed of motor；The circuit structure diagram of motor speed control circuit is as shown in Figure 3.The output axis connection of turntable and motor, is used for Subsidiary part measures the revolving speed of motor；The measurement portion point including photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and single-chip microcontroller；Be separately connected on single-chip microcontroller photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 memory, buzzer and；The single-chip microcontroller is used to receive and process the information of photoelectrical coupler transmission, and will processing As a result it is shown by LCD1602 liquid crystal display；AT24C02 memory is used for the mileage information and revolving speed that storage is handled Information.Hole setting on the alignment probe motor connection turntable of photoelectrical coupler；The photoelectrical coupler be to penetrating photoelectricity coupling Clutch.It is additionally provided with USB interface on the single-chip microcontroller, can be connect by this USB interface with PC machine and carries out data transmission and leads to Letter, PC machine can the program to single-chip microcontroller carry out debugging and burning.As shown in Fig. 2, R7 is red in the circuit of the photoelectrical coupler The current-limiting resistance of outer transmitting tube, adjusting W2 for adjusting the power that shines, R9 and W3 is the load resistance of light-sensitive device, adjusts W3 and uses In adjusting detectivity, LED is used to refer to switch state.In this way, being directed to different measurands, can adjust in real time, to reach It, can also be by LED light come intuitive display switch state to best test effect；Pass through the knot of photoelectrical coupler and single-chip microcontroller It closes, to simulate the measurement of mileometer, so that the measurement of contactless speed and mileage is realized, to make photoelectrical coupler mileage Watch experimental provision volume is smaller, structure is simpler, reaction speed is fast, precision is higher, and durability is also stronger, easily facilitates student Understand its structural principle；It connect whole device with PC machine by the setting of USB interface on single-chip microcontroller more convenient.

Claims (3)

1. a kind of photoelectrical coupler mileometer experimental provision, it is characterised in that: including ROTATING SOURCE part and part is measured, described turn Dynamic source part includes turntable, motor and motor speed control circuit, and motor speed control circuit is electrically connected for controlling turning for motor with motor Speed；The output axis connection of turntable and motor；The measurement portion point includes photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 Memory, buzzer, single-chip microcontroller；Photoelectrical coupler, LCD1602 liquid crystal display, AT24C02 storage are separately connected on single-chip microcontroller Device, buzzer；Hole setting on the alignment probe motor connection turntable of photoelectrical coupler；The photoelectrical coupler is correlation light Electric coupler.

2. photoelectrical coupler mileometer experimental provision according to claim 1, it is characterised in that: also set on the single-chip microcontroller It is equipped with USB interface, is also connected with PC machine on USB interface.

3. photoelectrical coupler mileometer experimental provision according to claim 2, it is characterised in that: the circuit of photoelectrical coupler Middle R7 is the current-limiting resistance of infrared transmitting tube；W2 is adjusted for adjusting the power that shines；R9 and W3 is the load resistance of light-sensitive device； W3 is adjusted for adjusting detectivity；LED is used to refer to switch state.