CN2395355Y

CN2395355Y - Portable low power consumption intelligent metronome

Info

Publication number: CN2395355Y
Application number: CN 99214018
Authority: CN
Inventors: 郭维克; 郭婧
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-16
Filing date: 1999-06-16
Publication date: 2000-09-06
Anticipated expiration: 2009-06-16

Abstract

The utility model relates to an electronic metronome. Compared with the existing metronome, the utility model has the new functions of program mask, memory storage, the output of standard volume, etc. The design adopts the new technology of the communication of a universal serial bus, the display of a dot matrix LCD, DC/DC conversion, etc., and thus the electronic metronome has the advantages of high intelligence, low power consumption and portability. Particularly, the utility model adopts a microcontroller chip with low power consumption in GMS97C series as a control kernel, and thus the utility model has the function of software encryption, effectively protecting knowledge results.

Description

The portable low power-consumption intelligent metronome

The utility model relates to a kind of electronic intelligence metronome, can be applicable to music education, musical instrument and vocal music exercise, occasions such as band and chorus's rehearsal.

Present metronome product mostly is mechanical type, as the product of SEIKO, NIKKO, BEYER company and state do not have quiet defeated in completed knocked down products.Its major defect is: the beat accuracy is low, and putting needs straight and evenly, and inconvenience is carried and do not had a mute function etc.And existing electronic metronome mostly adopt simple counter chip or not the single-chip microcomputer of tape program storer do core cell, the beat accuracy is low, does not store memory function, program can not be encrypted.Adopt LED segmentation charactron as display unit in the design, figure place showing is few, and digital content is simple, and device power consumption is big.Because use the ac rectifier power supply, machine volume is bigger, is not easy to carry.

The purpose of this utility model is to realize the portable low power-consumption intelligent metronome.The microcontroller chip that adopt novel low-power consumption in the design, includes electric erasable ROM is a core cell, and program can be encrypted or mask, beat accuracy height.Adopt nonvolatile memory, can arbitrarily store and change the data that need memory.Adopt dot matrix LCD display module, low in energy consumption, interface is simple, and how abundant in content character display is.Adopt the DC/DC conversion module, cell voltage is increased to VCC as internal power supply, volume is little, the efficient height.Above-mentioned new technology makes these facility that high intelligence, low-power consumption be arranged, function such as be easy to carry owing to adopt.

The utility model employing GMS97C * or AT89C * Series of MCU (4) conduct control core cell, with E in the chip ²PROM has saved peripheral hardware resource and wiring as program storage, has improved reliability.Software solidification and modification are convenient, can encrypt or mask, have protected knowledge production effectively.The serial port of the P10 of microcontroller (4), the same nonvolatile memory of P11 mouth (5) connects, the P10-P17 mouth connects with the bus mouth of dot matrix type LCD display module (3), the P3 mouth connects with under-voltage pilot lamp (6), beat sound equipment (7), standard sound equipment (8), quiet pilot lamp (9), the same key groups of P2 mouth (2) connects, and VCC is connected with the output terminal of GND end with DC/DC transducer (1).

Adopt AT24C * serial E ²The PROM chip is as the memory storage unit, can store or revise many groups beat data commonly used (chip is extendible to be stored to 100 groups by changing) as required arbitrarily, can access arbitrary group of data at any time in the use, because chip is non-volatile type, beat data will keep when shutdown or power down, automatically access when starting shooting again, need not to reset, simplified operation.Be serial communication between the same microcontroller of nonvolatile memory (5) (4), the SCL end directly is connected with the P1 mouth after drawing on the resistance with the SDA end, and SCL is a signal wire, and SDA is a clock line, the address wire A0-A2 ground connection of chip.

Adopt MDLS16 * point configuration LCD MODULE, can show 192 kinds of characters and self-defined Chinese character, cursor flash for prompting function is arranged, be convenient to the user and carry out man-machine conversation.Compare with LED segmentation charactron, character display is attractive in appearance, and content viewable is abundant, and power consumption is extremely low.Dot matrix type LCD module (3) is made up of display circuit and liquid crystal display, and the P1 mouth of microcontroller (4) is connected with bus end DB0-DB7, and the P3 mouth is connected with sheet choosing end E with read-write end (RS, R/W).Display module is with adopting parallel mode communication between the microcontroller, control signal is few, and interface is simple.

Adopt the step-up DC/DC conversion module of MAXIM company, can be with the voltage transformation about 1V to 3-5V, conversion efficiency is up to about 90%.No. 5 batteries of the input termination of DC/DC transducer, output termination VCC end, public termination GND end.It is big because of power consumption to have solved electronic metronome in the past, uses Alternating Current Power Supply and inconvenient problem of carrying.Module also has under-voltage measuring ability, when input voltage is lower than 1V, exports the P3 mouth of under-voltage signal to microcontroller.

Practise user's tuner of string music for convenience, this machine has designed 12 standard pronunciation outputs.Be respectively C1, #C1, D1, #D1, E1, F1, #F1, G1, #G1, A1, #A1, B1 adopts software programming to realize.When the user chooses the musical alphabet that needs and presses the K2 key from LCD display after, promptly exportable corresponding sound equipment.The K4 key is then pressed in gravity treatment, and musical alphabet can be by selecting repeatedly between C1 → B1 → C1.The frequency accuracy of outputting standard sound reaches 10 ^-1The Hz magnitude.

Each functional unit connection diagram of the present utility model is seen accompanying drawing 1, machine shape panel figure sees accompanying drawing 2, nonvolatile memory is seen accompanying drawing 3 with the connection of microcontroller, dot matrix LCD display module is seen accompanying drawing 4 with the connection of microcontroller, sounder, quiet indication is seen accompanying drawing 5 with earphone with being connected of microcontroller.

Marked the signal relation between each unit in the accompanying drawing 1, wherein DC/DC transducer and key groups are with being unidirectional input signal between the microcontroller.Dot matrix LCD display and nonvolatile memory are with being two-way signaling between the microcontroller.Under-voltage indication, the beat sound equipment, standard sound equipment and quiet indication are with being unidirectional output signal between the microcontroller.

K1-K4 in the accompanying drawing 2 is the keyswitch group, selects TP type reset switch for use.Wherein K1 is a storage/reset key, is used to select the parameter of storing and resetting.K2 is pattern/start key, is used for mode switch and restarts.K3 is the move left and right key, is used for moving cursor.K4 is an add-substract key, is used for revising the selection parameter.LED1 and LED2 are quiet pilot lamp, select for use redness and green highlighted luminotron to indicate beat respectively.SW1 is a power switch.

Storer in the accompanying drawing 3 adopts AT24C * serial E ²PROM, capacity are 128Byte-2048Byte, as beat and storage sequence number isoparametric storage unit, and the modification of memory contents and read with software and realize.Adopt I ²C serial protocol communication, read-write operation are carried out on sda line, and synchronizing signal is transmitted on scl line, have saved micro controller I/O resource.1. sequential is initial conditions among the figure, 2. is stop condition, 3. is the data condition for validity.

Dot matrix type LCD module in the accompanying drawing 4 is made up of display circuit and LCDs, and 8 bus ends connect with the P1 mouth of microcontroller, are convenient to software control.Enable Pin connects with the P3 mouth of microcontroller.Wherein RS is that register is selected, and R/W is a read-write, and E is for enabling the sheet choosing.COM1-COM16, SEG1-SEG40 are the dot matrix shows signal.

Triggering driver in the accompanying drawing 5 is a 74HC series low consumption circuit, and trigger connects with the P3 mouth any two ends of microcontroller.SW2 is 2 * 3 waveres, selects sound equipment output by switch, quiet output or earphone output.Miniwatt loudspeaker or hummer are adopted in sound equipment output.

Claims

1. portable low power-consumption intelligent metronome, it is characterized in that: the serial port of the P10 of microcontroller chip (4), the same nonvolatile memory of P11 mouth (5) connects, the P10-P17 mouth connects with the bus mouth of dot matrix type LCD module (3), the P3 mouth of microcontroller chip (4) connects with under-voltage pilot lamp (6), beat sound equipment (7), standard sound equipment (8), quiet pilot lamp (9), the same key groups of P2 mouth (2) of microcontroller chip (4) connects, and VCC is connected with DC/DC transducer (1) with the GND end.

2. portable low power-consumption intelligent metronome according to claim 1 is characterized in that: microcontroller chip (4) contains electrically-erasable memory (E ²PROM or Flash structure), the 2K-8K byte, program can be encrypted and mask.

3. portable low power-consumption intelligent metronome according to claim 1 is characterized in that: be serial communication between the same microcontroller of nonvolatile memory (5) (4), the SCL end directly is connected with the P1 mouth after drawing on the resistance with the SDA end, the A0-A2 end ground connection of chip.

4. portable low power-consumption intelligent metronome according to claim 1, it is characterized in that: dot matrix type LCD module (3) is made up of display circuit and liquid crystal display, the P1 mouth of microcontroller (4) is connected with bus end DB0-DB7, and the P3 mouth is connected with sheet choosing end E with reading and writing signal end (RS, R/W).

5. portable low power-consumption intelligent metronome according to claim 1, it is characterized in that: the P3 mouth of microcontroller chip (4) connects with triggering driver input end (A, B), and output terminal is connected with earphone by the same respectively sounder of multi-way switch SW2, quiet indicator.

6. portable low power-consumption intelligent metronome according to claim 1 is characterized in that: the standard pronunciation that standard acoustics unit (8) produces calculates frequency division by microcontroller (4) and produces, totally 12 musical alphabets, pure octave.