CN104157177A - Novel photoelectric sensor practical training device based on ARM7 - Google Patents
Novel photoelectric sensor practical training device based on ARM7 Download PDFInfo
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- CN104157177A CN104157177A CN201410432108.8A CN201410432108A CN104157177A CN 104157177 A CN104157177 A CN 104157177A CN 201410432108 A CN201410432108 A CN 201410432108A CN 104157177 A CN104157177 A CN 104157177A
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Abstract
The invention discloses a novel photoelectric sensor practical training device based on the ARM7. The novel photoelectric sensor practical training device is characterized by comprising a practical training device total board and a device arranged on the total board, the device comprises an analog part and a digital part, and the analog part is composed of front end sensor modules and an analog expansion module, wherein the analog expansion module is characterized in that a signal processing circuit is designed by a practical trainer by himself, and the front end sensor modules are independently arranged and can be expanded to be n in number according to the design requirement. The digital part is composed of a control unit ARM7-LPC2290, a liquid crystal display module and an independent button module; the front end sensor modules detect changes of the physical quantity of an object to be detected, changed electric signals are accordingly generated and input into an electric signal input analog extended module, effective electric signals are generated after sampling, filtering and amplifying and input into the control chip ARM7-LPC2290, and the control chip ARM7-LPC2290 completes A/D conversion, data processing and human-computer interaction interface control. The novel photoelectric sensor practical training device provides a platform for the practical trainer for designing a circuit and conducting signal conditioning by himself.
Description
Technical field
The invention belongs to electronic information class teaching detecting instrument, be specifically related to a kind of novel photoelectric sensing actual training device based on ARM7.
Technical background
Photoelectric sensing detection technique, it is a kind of new and high technology of non-cpntact measurement, the modern photoelectric devices such as laser, infrared, optical fiber of take are basis, detect measured signal, and be converted to electric signal by photoelectric sensor, circuit after testing, A/D conversion, Computing, processing, finally obtain information needed, being the important measure technology of modern detecting, is also an important development direction of following measurement technology.
< < photoelectric detecting technology > > is an important specialized courses of measure and control technology and instrument speciality, particularly important in the study of experiment link in this course, take and improve student's designed capacity and manipulative ability is object, is the pith of whole photoelectric detecting technology study.Yet existing Photoelectric Detection teaching experimental method for designing is single, and function is confined to theoretical validation, be difficult to reach the requirement of cultivating Students ' Comprehensive real training and innovation ability.Secondly, domestic existing photoelectric sensing teaching experimental, most good looking appearances, expensive, most circuit and components and parts used are hidden in experimental box body inside, and student cannot directly touch internal circuit, says nothing of and carries out innovative experimental design.
Summary of the invention
Object of the present invention is exactly development of new photoelectric sensing actual training device, to meet the teaching and research platform of existing ordinary higher learning school Photoelectric Detection experimental teaching demand.
Technical scheme of the present invention:
A novel photoelectric sensing actual training device based on ARM7, comprises the device that the total plate of actual training device and total plate are provided with, and device divides simulation part and numerical portion,
Simulation part is by front end sensors module, and simulation expansion module forms, and wherein simulates expansion module by real training person's autonomous Design signal conditioning circuit; Sensor assembly independently arranges, and according to designing requirement, can extend to n;
Numerical portion is by control module ARM7-LPC2290, LCD MODULE, and independent key-press module forms;
Sensor assembly detects the variation of the physical quantity of determinand, thereby the electric signal changing, by the electric signal input simulation expansion module changing, after sampling, filtering, amplification, produce effective electric signal input control chip ARM7-LPC2290, control chip ARM7-LPC2290 completes the control of A/D conversion, data processing and human-computer interaction interface.
Also comprise:
Power module, to each module for power supply of novel photoelectric sensing actual training device; Power module adopts double Europlug power supply;
After power supply, ARM7 starts initialization and also drives LCD MODULE to show human-computer interaction interface, by operating independent button, makes key control unit ARM7-LPC2290 call different subroutines to enter experiment flow to be done;
Enter after corresponding experiment, the measured signal input simulation expansion module that front end sensors gathers, real training person is designed, designed settling signal modulate circuit on simulation expansion module, and by the signal input control chip ARM7-LPC2290 after processing, control chip ARM7-LPC2290 data acquisition and algorithm process rear drive liquid crystal display carry out experimental result demonstration.
Preferred:
Control chip ARM7-LPC2290 is as embedded microcontroller, and its inside is integrated with 10 successive approximation type a/d converters;
Sensor assembly comprises: infrared thermal release electric, correlation optoelectronic switch, reflective photoelectric switch, photoelectric cell, photodiode, thermistor, photoresistance;
Simulation expansion module comprises: sample circuit, filtering circuit, amplifying circuit;
Independent key-press module comprises: be arranged at above and below independence button, determine independent button, return to independent button;
LCD MODULE adopts LCM12864.
Further preferably:
Power module adopts U1～U2;
Sensor assembly adopts 7 independently sensor assembly U3～U7, U16, U17;
Simulation expansion module adopts U8～U10;
Independent key-press module adopts U12～U15;
Key control unit ARM7-LPC2290 adopts U11;
LCD MODULE adopts U18;
The output terminal of U3～U7 in sensor assembly is connected to the input end of simulation expansion module U8～U10, the output terminal of U8～U10 connects No. 23 pins of U11, No. 23 pin ports are the input port of 10 successive approximation type a/d converters, U16 in sensor assembly, U17 is connected to No. 49 pins of U11, 100 of U11, 101, 121, No. 122 pins are connected respectively to the upper U12 of independent button, lower U13, determine U14, return to U15, 50 of U11, 58, 59, 61, 68, 69, 75, 76, 78, 83, 84, 85, 92, No. 99 pin is connected respectively to 4 of LCD MODULE U18, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, No. 17 pins, realize human-computer interaction function.
Power module adopts AMS1117, and LCD MODULE adopts LCM12864R, adopts the photodiode of wavelength 650nm, and infrared thermal releasing electric probe adopts LHI778, and tachometric survey adopts correlation flute profile optocoupler GK122.
The present invention changes into design innovation type experiment porch by traditional experiment instrument: ARM7 processor, in conjunction with independent key-press module and LCD MODULE, is integrated in same operating platform by a plurality of different experiments and completes, and has greatly saved the cost of experiment instrument; Simulation expansion module provides the platform of designed, designed circuit and signal condition to student, strengthen the ability of practice of student's design and innovation; Modular open by design thought, makes student can fully contact experiment required senser element and circuit component, can build flexibly experiment porch self-maintain instrument, for exercise student ' synthetic innovation manipulative ability provides platform.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the embodiment of the present invention.
Fig. 2 is the sensor assembly schematic diagram of the embodiment of the present invention.
Fig. 3 is the liquid crystal display circuit schematic diagram of the embodiment of the present invention.
In figure, power module adopts U1～U2, sensor assembly U3～U7, U16, U17, simulation expansion module U8～U10, independent key-press module U12～U15, key control unit U11, LCD MODULE U18.
Embodiment
Technical scheme in the embodiment of the present invention is carried out clearly below, intactly describe, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all should belong to the scope of the application's protection.Therefore, scope of the present invention is not limited to following embodiment.
Embodiment 1:
A novel photoelectric sensing actual training device based on ARM7, comprises what the total plate of actual training device and total plate were provided with: power module U1～U2,7 (can extend to n) be sensor assembly U3～U7, U16, U17, simulation expansion module U8～U10, independent key-press module U12～U15, key control unit ARM7-LPC2290 U11, LCD MODULE U18 independently.Power module adopts the power supply of double Europlug, and after power supply, ARM7 starts initialization and also drives U18 to show human-computer interaction interface, by operating independent button, makes U11 call different subroutines to enter experiment flow to be done; Enter after corresponding experiment, the measured signal input simulation expansion module that front end sensors gathers, student is designed, designed settling signal modulate circuit on simulation expansion module, and by the signal input U11 after processing, U11 data acquisition and algorithm process rear drive liquid crystal display carry out experimental result demonstration.
Control chip ARM7-LPC2290 is as embedded microcontroller U11, and its inside is integrated with 10 successive approximation type a/d converters; Sensor assembly comprises: infrared thermal release electric U3, correlation optoelectronic switch U16, reflective photoelectric switch U17, photoelectric cell U7, photodiode U5, thermistor U4, photoresistance U6; Simulation expansion module comprises: sample circuit U8, filtering circuit U9, amplifying circuit U10; Independent key-press module comprises: upper U12, and lower U13, determines U14, returns to U15; LCM12864 is as LCD MODULE U18.
The output terminal of U3～U7 in sensor assembly is connected to the input end of simulation expansion module U8～U10, the output terminal of U8～U10 connects No. 23 pins of U11, No. 23 pin ports are the input port of 10 successive approximation type a/d converters, U16 in sensor assembly, U17 is connected to No. 49 pins of U11, 100 of U11, 101, 121, No. 122 pins are connected respectively to the upper U12 of independent button, lower U13, determine U14, return to U15, 50 of U11, 58, 59, 61, 68, 69, 75, 76, 78, 83, 84, 85, 92, No. 99 pin is connected respectively to 4 of LCD MODULE U18, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, No. 17 pins, realize human-computer interaction function.
Simulation expansion module, as signal conditioning circuit, comprises sample circuit U8, filtering circuit U9, amplifying circuit U10.This module is innovated the platform of real training as student, by student's designed, designed, completed.
The invention will be further described by reference to the accompanying drawings again:
In Fig. 1, when U1～U2 is after system power supply, U12～U15 automatically starts initialization and drives U18 to show human-computer interaction interface, shows experiment menu to be selected.Student by operation U12～U15 select to wait to test, chosen successfully after, U18 only shows experiment title to be done.The power supply of connecting sensor assembly and simulation expansion module, the physical quantity that sensor assembly detects determinand changes, and is translated into corresponding electric signal transmission to U8～U10.In U8～U10, student's designed, designed completes corresponding sample circuit U8, filtering circuit U9, and amplifying circuit U10, then enters by the signal transmission after conditioning A/D conversion and the computing that U11 carries out signal, finally by U18, shows.
Sensor module structure as shown in Figure 2, the sensor assembly being formed by pyroelectric infrared sensor U3, thermistor (temperature) sensor U4, photodiode sensor U5, photosensitive resistance sensor U6, photoelectric cell sensor U7, correlation optoelectronic switch U17, reflective photoelectric switch U18, each sensor is drawn and is independently exported test point, during experiment, only the output of correspondence experiment need be connected to the input of next corresponding module.
As shown in Figure 3, No. 23 pins the useful signal of simulation expansion module output being received to LPC2290 carry out A/D conversion to liquid crystal display circuit schematic diagram, and transformation result is stored in register.50,58, No. 59 pins of LPC2290 connect respectively 4,5, No. 6 pins of LCM12864.No. 4 pins of LCM12864 are data/command selection positions; No. 5 pins are that read/write is selected position; No. 6 pin is enable bit; No. 15 pins are that serial/parallel data transmission mode is selected position; No. 17 pin is reset terminal.In the present invention, making No. 15 pins is high level, select parallel data transmission mode, when 4, No. 6 pin output high level, during No. 5 pin output low levels, by 7,8,9,10,11,12,13, No. 14 pins, to LCM12864, write demonstration data, in the negative edge data of No. 6 pins, be stored into LCM12864 and be performed.When 4, No. 5 pin output low levels, during No. 6 pins output high level, by 7,8,9,10,11,12,13, No. 14 pins, to LCM12864, write control command, in the negative edge order of No. 6 pins, be stored into LCM12864 and be performed.4 independent buttons respectively 100,101,121, No. 122 pins join, the control of responsible official's machine interactive interface, LPC2290 obtains operational order by scanning stand-alone keypad, when there being key to be pressed, there is low level in corresponding pin, carry out corresponding program, in the time of LPC2290 scanning stand-alone keypad, control LCM12864 display menu, improved the response speed of button.
Claims (5)
1. the novel photoelectric sensing actual training device based on ARM7, its feature is, comprises the device that the total plate of actual training device and total plate are provided with, device divides simulation part and numerical portion,
Simulation part is by front end sensors module, and simulation expansion module forms, and wherein simulates expansion module by real training person's autonomous Design signal conditioning circuit; Sensor assembly independently arranges, and according to designing requirement, can extend to n;
Numerical portion is by control module ARM7-LPC2290, LCD MODULE, and independent key-press module forms;
Sensor assembly detects the variation of the physical quantity of determinand, thereby the electric signal changing, by the electric signal input simulation expansion module changing, after sampling, filtering, amplification, produce effective electric signal input control chip ARM7-LPC2290, control chip ARM7-LPC2290 completes the control of A/D conversion, data processing and human-computer interaction interface.
2. the novel photoelectric sensing actual training device based on ARM7 according to claim 1, its feature is also to comprise:
Power module, to each module for power supply of novel photoelectric sensing actual training device; Power module adopts double Europlug power supply;
After power supply, ARM7 starts initialization and also drives LCD MODULE to show human-computer interaction interface, by operating independent button, makes key control unit ARM7-LPC2290 call different subroutines to enter experiment flow to be done;
Enter after corresponding experiment, the measured signal input simulation expansion module that front end sensors gathers, real training person is designed, designed settling signal modulate circuit on simulation expansion module, and by the signal input control chip ARM7-LPC2290 after processing, control chip ARM7-LPC2290 data acquisition and algorithm process rear drive liquid crystal display carry out experimental result demonstration.
3. the novel photoelectric sensing actual training device based on ARM7 according to claim 1, its feature is,
Control chip ARM7-LPC2290 is as embedded microcontroller, and its inside is integrated with 10 successive approximation type a/d converters;
Sensor assembly comprises: infrared thermal release electric, correlation optoelectronic switch, reflective photoelectric switch, photoelectric cell, photodiode, thermistor, photoresistance;
Simulation expansion module comprises: sample circuit, filtering circuit, amplifying circuit;
Independent key-press module comprises: be arranged at above and below independence button, determine independent button, return to independent button;
LCD MODULE adopts LCM12864.
According to claim 3 based on the novel photoelectric sensing actual training device of ARM7, its feature is:
Power module adopts U1～U2;
Sensor assembly adopts 7 independently sensor assembly U3～U7, U16, U17;
Simulation expansion module adopts U8～U10;
Independent key-press module adopts U12～U15;
Key control unit ARM7-LPC2290 adopts U11;
LCD MODULE adopts U18;
The output terminal of U3～U7 in sensor assembly is connected to the input end of simulation expansion module U8～U10, the output terminal of U8～U10 connects No. 23 pins of U11, No. 23 pin ports are the input port of 10 successive approximation type a/d converters, U16 in sensor assembly, U17 is connected to No. 49 pins of U11, 100 of U11, 101, 121, No. 122 pins are connected respectively to the upper U12 of independent button, lower U13, determine U14, return to U15, 50 of U11, 58, 59, 61, 68, 69, 75, 76, 78, 83, 84, 85, 92, No. 99 pin is connected respectively to 4 of LCD MODULE U18, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, No. 17 pins.
According to claim 4 based on the novel photoelectric sensing actual training device of ARM7, its feature is: power module adopts AMS1117, LCD MODULE adopts LCM12864R, adopt the photodiode of wavelength 650nm, infrared thermal releasing electric probe adopts LHI778, and tachometric survey adopts correlation flute profile optocoupler GK122.
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| WO1994000832A1 (en) * | 1992-06-22 | 1994-01-06 | Abovo, Inc. | Personal communicating device |
| US5841373A (en) * | 1994-07-05 | 1998-11-24 | Mason; Donny L. | Simplified alphabetic communicator for handicapped or infirmed persons |
| CN101944302A (en) * | 2010-09-30 | 2011-01-12 | 南京信息工程大学 | Teaching experimental platform for photoelectric sensor |
| CN202795859U (en) * | 2012-10-08 | 2013-03-13 | 常州信息职业技术学院 | Portable universal 51 one-chip microcomputer teaching experimental instrument |
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