CN201868069U

CN201868069U - Multifunctional information recording card applicable to inflammable and explosive environments

Info

Publication number: CN201868069U
Application number: CN2010205920642U
Authority: CN
Inventors: 陈晓曦; 吕玉鹏; 陈巍
Original assignee: Zoucheng Jinhuang Technology & Trade Co Ltd
Current assignee: Zoucheng Jinhuang Technology & Trade Co Ltd
Priority date: 2010-11-04
Filing date: 2010-11-04
Publication date: 2011-06-15
Anticipated expiration: 2020-11-04

Abstract

A multifunctional information recording card applicable to inflammable and explosive environments comprises a power module, a liquid crystal module, a microcontroller, a Chinese character library file memory, a clock module, a temperature measuring module, an infrared receiving module and a data memory module which are packed in a sealed anti-explosion shell. The liquid crystal module consists of a first row driver, a second row driver, a column driver, a backlight source driver and a dot-matrix liquid crystal display screen, the dot-matrix liquid crystal display screen comprises a left screen and a right screen, the microcontroller consists of a single chip microcomputer, the clock circuit module consists of a clock chip, a crystal oscillator and a battery, the temperature measuring module consists of a temperature sensor, the infrared receiving module comprises an infrared receiving circuit chip, an infrared receiving diode and a Schmidt inverter, and the data memory module includes a bulk memory. The information recording card can solve the problem that petrol inspection is higher in randomness and difficult to monitor and manage, and recording by means of a small blackboard is highly affected by human factors and more backward.

Description

Be applicable to the multifunctional information registration plate in the inflammable and explosive environment

Technical field

The utility model relates to electronic information record display board, and particularly a kind of is that multifunctional information in the inflammable and explosive environment of being applicable to of the supporting place writes down display board with electronic computer technology, electronic information technology, electrical explosion proof technology, modern management technique.

Background technology

Petrochemical industry, in many production operations place of industries such as coal, owing to exist inflammable and explosive gas or material, must take some special measure and means, burn to suppress and to stop, the factor and the condition of blast, take place in order to stop gas explosion accident, the China's coal-mine industry has been taked the monitoring of coal mine safety supervisory system, go into the full-time touring Trinitarian detection that detects of autonomous monitoring of well personnel and fireboss, the monitoring system, this wherein seems particularly important with full-time touring detection of fireboss, the fireboss is carrying light interference type methane analyzer, thermometer, wrist-watch, gas detection class newspaper handbook etc., arrangement according to the leader, periodically on the gas check point that he is responsible for, detect gas, the ore deposit that has is that a watt of inspection person is responsible for a check point, the ore deposit that also has is that a watt of inspection person is responsible for two, three check points, and should be filled up to detected gas density on the registration plate in time, notify the field personnel simultaneously and report to relevant leader.

At present, the gas registration plate of each actual use in large, medium and small colliery is a wooden small blackboard; Wooden small blackboard is suspended on the wall of each gas detection point, has gone out a form with sanguine on the gas registration plate, has listed time, methane concentration, gas concentration lwevel, place, name etc. on the form; After watt inspection person checks out the gas situation at every turn, just concrete numeral is filled up in the relevant form of small blackboard with chalk, itself just exists shortcoming this way: because relatively moister under the coal mine, chalk one makes moist, the writing that writes out is just smudgy, and person's handwriting makes moist for a long time and just more is difficult to recognize; Chalk writing is smeared, is changed, is faked easily in addition.

Fireboss's great majority are all respected one's career and love one's job, and are careful and responsible, can well finish one's work, but also have watt inspection person of minority to treat slack in one's work neglecting, and sleep, the omission of leaving post in the class have brought hidden danger to the colliery safety in production.

For example, the leader's regulation that has, watt inspection person's per tour must detect twice gas density at least, fills in the gas density situation at times on small blackboard twice; But watt inspection person who has checks one time gas density when just going into the well, and twice all write, the inspection that should carry out has not for the second time just checked that do not check gas density in the official hour section, this has just brought very big hidden danger to safety in production yet when filling in.Fireboss's scope of activities is wide, and flowability is very big, in dark under coal mine, the narrow narrow ground environment, is difficult to watt inspection person done well and supervises, manages, and is difficult to confirm whether they are working responsibly.

Wooden gas registration plate is a passive acceptor, it is bigger influenced by human factor, therefore, being badly in need of a kind of is that multifunctional information in the inflammable and explosive environment of being applicable to of the supporting place writes down display board with electronic computer technology, electronic information technology, electrical explosion proof technology, modern management technique.

The utility model content

The purpose of this utility model provides a kind of multifunctional information registration plate that is applicable in the inflammable and explosive environment, it is stronger to solve full-time staff's tours of inspection randomness, topic between being difficult to supervise, manage can also solve the problem that the small blackboard record is subjected to human factor to influence more greatly, comparatively fall behind.

For achieving the above object, the utility model is by the following technical solutions:

A kind of multifunctional information registration plate that is applicable in the inflammable and explosive environment, by the power module that is encapsulated in the sealing explosion-proof casing, Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, data memory module is formed, power module is connected with the intrinsic safety electric source of explosion-proof casing outside, power module is a Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, the data memory module power supply

It is characterized in that: described Liquid Crystal Module is by a row driver, No. two row drivers, line driver, backlight driver, matrix liquid-crystal display screen constitutes, matrix liquid-crystal display screen is made up of left side screen and right screen, described microcontroller is made of the AVR series monolithic, eight bit parallel data port lines in the PA port of single-chip microcomputer respectively with a row driver, the FPDP of No. two row drivers connects, the 7th two-way I/O mouth line and a row driver in the pc port of single-chip microcomputer, the register of No. two row drivers selects port to connect, the 6th two-way I/O mouth line and a row driver in the pc port of single-chip microcomputer, the reading-writing port of No. two row drivers connects, the 5th two-way I/O mouth line and a row driver in the pc port of single-chip microcomputer, a sheet of No. two row drivers selects port to connect, the 4th two-way I/O mouth line and a row driver in the pc port of single-chip microcomputer, No. two sheets of No. two row drivers select port to connect, the 3rd two-way I/O mouth line in the pc port of single-chip microcomputer is connected with the switch terminals of backlight driver, the read signal end of single-chip microcomputer, the write signal end is through Sheffer stroke gate logical circuit and a row driver, the Enable Pin E of No. two row drivers connects, a timer port of single-chip microcomputer is connected with the control end of backlight driver, the column address output terminal of a row driver is connected with the column address input end of matrix liquid-crystal display screen left side screen, the column address output terminal of No. two row drivers is connected with the column address input end of the right screen of matrix liquid-crystal display screen, the frame synchronizing signal end of line driver and a row driver, the frame synchronizing signal end of No. two row drivers connects, line driver latch capable display synchronization signal end and a row driver, the capable display synchronization signal end that latchs of No. two row drivers connects, the built-in function clock signal terminal of line driver and a row driver, the built-in function clock signal terminal of No. two row drivers connects, the AC driving waveform signal end of line driver and a row driver, the AC driving waveform signal end of No. two row drivers connects, the row address output terminal of line driver is connected with the row address input end of matrix liquid-crystal display screen, and the serial data port of single-chip microcomputer is connected with the serial data port of Chinese character base file memory; Second two-way I/O mouth line in the PD port of single-chip microcomputer is connected with the write-protect port of Chinese character base file memory; The clock circuit module is made of clock chip, crystal oscillator, battery, the serial data port of clock chip, serial clock port, reseting port are connected with the the 7th, the 6th, the 5th two-way I/O mouth line in the PF port of single-chip microcomputer respectively, crystal oscillator is connected between the external crystal oscillator end of clock chip, the positive and negative electrode of battery is connected with earth terminal with the positive power source terminal of clock chip respectively, temperature-measuring module is made of temperature sensor, and the digital signal input/output end port of temperature sensor is connected with the two-way I/O mouth of zero-bit line in the PF port of single-chip microcomputer; Infrared receiving module is made of infrared receiving circuit chip, infrared receiving diode, schmitt inverter, infrared receiving diode is connected with the input end of infrared receiving circuit chip, and the output terminal of infrared receiving circuit chip is connected with No. four interrupt request ports of single-chip microcomputer through schmitt inverter; Data memory module is made of mass storage, the serial clock port of mass storage is connected with the serial clock port of single-chip microcomputer, the serial input terminal mouth of mass storage goes out from inbound port to be connected with the master of single-chip microcomputer, the serial output terminal mouth of mass storage goes into from outbound port to be connected with the master of single-chip microcomputer, and the sheet of mass storage selects the 4th mouth line in the PB port of port and single-chip microcomputer to be connected.

The utility model has following positive beneficial effect:

The utility model replaces traditional wooden small blackboard formula gas registration plate with the electronic information registration plate; The electronic information registration plate is suspended on the wall of each gas detection point, after watt inspection person checks out the gas situation at every turn, just use the infrared remote control keyboard with in detected relevant information (methane concentration, gas concentration lwevel, place, name) the typing registration plate, show by matrix liquid-crystal display screen, do not exist with the defeated writing problem that the back is smudgy, be difficult to recognize of making moist of writing of chalk, the information of demonstration yet can not smeared, be changed, be faked.The time of the each entry information of fireboss is automatically recorded by Single Chip Microcomputer (SCM) system timing, fixed point, provides the standard time by clock chip, does not need outside input, fraud therefore can not occur, is convenient to supervision, management.

Description of drawings

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 3 is the inner structure synoptic diagram of Liquid Crystal Module.

Fig. 4 is the pinouts of line driver HD61203.

Fig. 5 is the pinouts of row driver HD61202.

Fig. 6 is that structural representation is formed in the inside of row driver HD61202.

Fig. 7 is the structural representation of the display-memory of row driver HD61202 inside.

Fig. 8 is the circuit theory diagrams of Infrared Remote-Control Sending module.

Embodiment

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the utility model is a kind of multifunctional information registration plate that is applicable in the inflammable and explosive environment, by the power module that is encapsulated in the sealing explosion-proof casing, Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, data memory module is formed, power module is connected with the intrinsic safety electric source of explosion-proof casing outside, and power module is a Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, the data memory module power supply.Power module adopts prior art.

Liquid Crystal Module is made of a row driver U1, No. two row driver U2, line driver U3, backlight driver U4, matrix liquid-crystal display screen U5, matrix liquid-crystal display screen U5 is made up of left side screen and right screen, and the model of row driver U1, No. two row driver U2 is HD61202.The model of line driver U3 is HD61203, and the model of backlight driver U4 is SP7611, and on the panel of explosion-proof casing, the position corresponding with matrix liquid-crystal display screen U5 is provided with transparent window.Microcontroller is made of AVR series monolithic U6, and the model of single-chip microcomputer U6 is ATMEGA128 or ATMEGA64.

Eight bit parallel data port line PA0-PA7 in the PA port of single-chip microcomputer U6 are connected with the FPDP DB0-DB7 of row driver U1, No. two row driver U2 respectively,

The 7th two-way I/O mouth line PC7 in the pc port of single-chip microcomputer U6 selects port D/I to be connected with the register of row driver U1, No. two row driver U2,

The 6th two-way I/O mouth line PC6 in the pc port of single-chip microcomputer U6 is connected with the reading-writing port R/W of row driver U1, No. two row driver U2,

The 5th two-way I/O mouth line PC5 in the pc port of single-chip microcomputer U6 selects port CS1 to be connected with the sheet of row driver U1, No. two row driver U2,

The 4th two-way I/O mouth line PC4 in the pc port of single-chip microcomputer U6 selects port CS2 to be connected with No. two sheets of row driver U1, No. two row driver U2,

The 3rd two-way I/O mouth line PC3 in the pc port of single-chip microcomputer U6 is connected with the switch terminals ON/OFF of backlight driver U4,

Read signal end/RD of single-chip microcomputer U6, write signal end/WR are connected with the Enable Pin E of row driver U1, No. two row driver U2 through Sheffer stroke gate logical circuit F1, F2, F3,

The timer port T1 of single-chip microcomputer U6 is connected with the control end CTRL of backlight driver U4,

The column address output terminal Y0-Y64 of a row driver U1 is connected with the column address input end SEG1-SEG64 of matrix liquid-crystal display screen U5 left side screen, and drive 64 of matrix liquid-crystal display screen left side screen and rank the address,

The column address output terminal Y0-Y64 of No. two row driver U2 is connected with the column address input end SEG65-SEG128 of the right screen of matrix liquid-crystal display screen U5, and drive 64 of the right screen of matrix liquid-crystal display screen and rank the address,

The frame synchronizing signal end FRM of line driver U3 is connected with the frame synchronizing signal end FRM of row driver U1, No. two row driver U2,

The capable display synchronization signal end CL that latchs of line driver U3 is connected with the capable display synchronization signal end CL of latching of row driver U1, No. two row driver U2,

Built-in function clock signal terminal a1, the a2 of line driver U3 is connected with built-in function clock signal terminal a1, the a2 of row driver U1, No. two row driver U2,

The AC driving waveform signal end M of line driver U3 is connected with the AC driving waveform signal end M of row driver U1, No. two row driver U2,

The row address output terminal X1-X64 of line driver U3 is connected with the row address input end COM1-COM64 of matrix liquid-crystal display screen U5, drives 64 row addresses of matrix liquid-crystal display screen,

The serial data port SDA of single-chip microcomputer U6, serial clock port SCK are connected with serial data port SDA, the serial clock port SCK of Chinese character base file memory U7, U8;

Second two-way I/O mouth line PD2 in the PD port of single-chip microcomputer U6 is connected with the write-protect port WP of Chinese character base file memory U7, U8;

The clock circuit module is made of clock chip U9 (model is HT1380), crystal oscillator Y2, battery E1,

The serial data port SDA of clock chip U9, serial clock port SCLK, reseting port RST are connected with the the 7th, the 6th, the 5th two-way I/O mouth line PF7, PF6, PF5 in the PF port of single-chip microcomputer U6 respectively,

Crystal oscillator Y2 is connected between external crystal oscillator end X1, the X2 of clock chip U9,

The positive and negative electrode of battery E1 is connected with earth terminal GND with the positive power source terminal V1 of clock chip U9 respectively,

Temperature-measuring module is made of temperature sensor U10, and (temperature sensor U10 model is DS1820),

The digital signal input/output end port DQ of temperature sensor U10 is connected with the two-way I/O mouth of zero-bit line PF0 in the PF port of single-chip microcomputer U6;

Infrared receiving module is made of infrared receiving circuit chip U11 (model is GL3276A), infrared receiving diode PH302B, schmitt inverter,

Infrared receiving diode PH302B is connected with the input end IN+ of infrared receiving circuit chip U11,

The output terminal OUT of infrared receiving circuit chip U11 is connected with No. four interrupt request port INT4 of single-chip microcomputer U6 through two schmitt inverter 74LS14;

Data memory module is made of mass storage U12, and the serial clock port SCK of mass storage U12 is connected with the serial clock port SCK of single-chip microcomputer U6, and the model of mass storage U12 is AT45DB081,

The serial input terminal mouth SI of mass storage U12 goes out from inbound port MOSI to be connected with the master of single-chip microcomputer U6,

The serial output terminal mouth SO of mass storage U12 goes into from outbound port MISO to be connected with the master of single-chip microcomputer U6,

The sheet of mass storage U12 selects the 4th mouth line PB4 in the PB port of port/CS and single-chip microcomputer U6 to be connected.

The internal circuit diagram of Liquid Crystal Module as shown in Figure 3, matrix liquid-crystal display screen U5 is the 128x64 dot matrix, and 128 points are laterally arranged, and 64 points are vertically arranged, each Chinese character is made up of the 16x16 point, every row shows 8 Chinese words, 4 row amount to 32 Chinese words.

Two row driver U1, U2 (model is HD61202) are arranged in the Liquid Crystal Module, and each row driver has 512 bytes (4096) to show for RAM.The bits per inch certificate of RAM display-memory unit and the pixel status 1/0 (1=is bright, and 0=goes out) in full accord of every of matrix liquid-crystal display screen U5.

Left side half screen/right half screen control is by CS1, CS2 sheet choosing decision.When CS1=1, CS2=0, row driver U1 chooses, and row driver U2 does not choose, and promptly selects left half screen; Row driver U2 chooses when CS1=0, CS2=1, row driver U1 do not choose, and promptly selects right half screen.Each row driver HD61202 has the register of 512 bytes, has 1024 byte registers so row driver U1 and row driver U2 add up, the explanation of HD61202 chip pin:

1 pin (Vss): ground connection

2 pin (Vdd): power supply 5 (1 ± 5%) V.

3 pin (Vo): anti-diopter adjustment.

4 pin (D/I): register is selected.1: select data register; 0: the selection instruction register.

5 pin (R/W): read/write is selected.1: read; 0: write.

6 pin (E): enable operation.1: can do read/write operation; 0: can not do read/write operation.

7 pin (DB0): the 0th of BDB Bi-directional Data Bus.

8 pin (DB1): the 1st of BDB Bi-directional Data Bus

9 pin (DB2): the 2nd of BDB Bi-directional Data Bus.

10 pin (DB3): the 3rd of BDB Bi-directional Data Bus

11 pin (DB4): the 4th of BDB Bi-directional Data Bus.

12 pin (DB5): the 5th of BDB Bi-directional Data Bus

13 pin (DB6): the 6th of BDB Bi-directional Data Bus.

14 pin (DB7): the 7th of BDB Bi-directional Data Bus

15 pin (CS1): left half screen chip selection signal.1: choose; 0: do not choose;

16 pin (CS2): right half screen chip selection signal.1: choose; 0: do not choose;

17 pin (RESET): reset signal, low level is effective.

18 pin (VEE): LCD negative pressure driving pin (10～-18V).

19 pin (NC): empty pin (or connecing backlight electric power).

20 pin (NC): empty pin (or connecing backlight electric power)

Matrix liquid-crystal display screen U5 is by the row, column driver drives, and HD61203 is a line driver, and HD61202 is a row driver.Row driver HD61202 is connected with the port of single-chip microcomputer U6, and the HD61203 line driver is connected with the port of row driver HD61202, the inner structure of HD61202 such as Fig. 6, shown in Figure 7:

One, I/O impact damper

The I/O impact damper is the two-way three-state data buffer, and its effect is that the system that two different clocks are worked is down coupled together, and realizes communication.Under chip selection signal CS1, CS2 combination effective status, the I/O impact damper is open, realizes the data transfer between HD61202 and the single-chip microcomputer.When chip selection signal is combined as disarmed state, the I/O impact damper will interrupt getting in touch of HD61202 and single-chip microcomputer U6, externally be high-impedance state.

Two, input register

Input register is used for the data that temporary transient storage will write display random access memory (display-memory).Data write input register by single-chip microcomputer U6, and then by writing in the display-memory automatically after the inter-process.Work as CS=1, D/I=1, and during R/W=1, data are locked input register at enable signal E negative edge.

Three, output register

The data of reading from display random access memory at first temporarily are stored in output register.Single-chip microcomputer U6 will then make CS=D/I=R/W=1 from the output register sense data.During the read data order, the data that are stored in the output register are exported during for high level at pin E; When pin E signal was low level, the video data that address pointer points to was then locked output register and address pointer increases progressively then.In the output register, can be write new data again because of the instruction of read data, if the address pointer setting command then data remain unchanged.

Four, display-memory circuit

HD61202 has 4096 display-memories.Its structure is to arrange with one 64 * 64 box formation.The effect one of display-memory is the video data that the storage single-chip microcomputer transmits, the 2nd, directly control the output of liquid crystal display drive circuit as the control signal source.Display-memory is a dual port memory structure.Seen 64 from the data bus side, be divided into 8 the tunnel, be called the page, controlled by the X address register by 8 bit data bus length; Each page all has 64 bytes, use the Y address counter controls, this side provides to single-chip microcomputer operation, it is the transmitted in both directions form, the XY address counter has been selected the page and the column address of the display-memory that single-chip microcomputer will operate, thereby determines the display-memory unit that single-chip microcomputer U6 will visit uniquely.Seen 64 from the driving data transmission equipment side, totally 64 row, this side provides to driver and uses, and output form is only arranged.

The HD61202 row driver is that 64 row drive output, just in time is listed as to (vertically) unit corresponding with display-memory.The Z address counter is the display line pointer, is used for selecting the current data line that will transmit.

Five, XY address counter

The XY address counter is 9 a register, and it has determined the address of the display-memory unit of the required visit of single-chip microcomputer.The X address counter is high 3, and the Y address counter has instruction separately to set X, Y address respectively for low 6.Single-chip microcomputer must be provided with the XY address counter before the visit display-memory.Single-chip microcomputer writes or reads a certain vertical data that list on the data display screen of display-memory at 8.A point data is gone up in the D0 representative most.

The X address counter is 3 page address registers, and the selection of 8 pages in the display-memory is being controlled in its output, is just controlling eight of data transmission channel and is selecting a selector switch.The X address register by single-chip microcomputer with the instruction type setting.

The Y address counter is that 6 circulations add 1 counter.It manages 64 unit on a certain page, the output waveform of the 64 bit data direct controlling and driving circuit output Y1～Y64 on this data bus.With the instruction type setting, it and page address pointer be in conjunction with a unit of unique gating display-memory by single-chip microcomputer for the Y address counter, and the Y address counter has and adds 1 function automatically, and the Y address counter will add 1 automatically after the display-memory read/write operation.Circulation is made zero and is continued to progressively increase again after counter adds to 3FH.

Six, show the initial row register

Show that the initial row register is 6 bit registers, it has stipulated the row number of first row on the corresponding display screen of display-memory institute, and the data of this row will be as the control signal of the first capable show state on the display screen.The content that shows the initial row register is write by the form of single-chip microcomputer with instruction code.Certain data line corresponds to the most up of lcd screen among this register appointment RAM, can be used as the screen scrolling.

Seven, Z address counter

The Z address counter also is 6 bit address counters, is used for determining the scan address of current display line.The Z address counter has and adds 1 function automatically, and the line scanning output of it and line driver is selected the data output of corresponding row driver synchronously.Add 1 during the negative edge of the CL clock signal pulse of sending at line driver.When the high level of frame synchronizing signal FRM, insert the content that shows the initial row register, with the beginning that shows as recycle.

Eight, show the ON/OFF trigger

The removing end of output one tunnel control video data latch of this trigger, the one tunnel turns back to interface control circuit as the current show state of a bit representation in the status word.The effect of this trigger is exactly to control the switch of the level of display driver output with control display screen.When being output as " pass " level at trigger, the input of video data latch is blocked and will exports reset, all is non-selection waveform thereby make display driver output, and display screen is not show state.When being output as " opening " level at trigger, the video data latch is controlled by clock CL, and display driver output is subjected to Data Control on the display driver data bus, and LCDs will be the demonstration state.Show that the ON/OFF trigger is controlled by logical circuit, single-chip microcomputer U6 resets by hardware RESET and writing of software instruction " display switch setting " is provided with the output state that shows the ON/OFF trigger.

Nine, order register

Order register is used to receive the instruction code that single-chip microcomputer is sent, and by decoding instruction code is implanted in the relevant register or trigger.

Ten, status word register

Status word register is HD61202 unique " shaking hands " signal when communicating by letter with single-chip microcomputer U6.Status register has been represented the HD61202 current working state to single-chip microcomputer.Busy signal (Busy) most importantly wherein, busy signal is " 1 ", and expression HD61202 is being busy with inner working, and except the state reading command, other any instructions are not accepted.Busy signal (Busy) is to be represented by status word DB7 that reading command is read.Before will sending instructions, should determine earlier that busy signal has been " 0 " at every turn.

11, video data latch

Data will output to liquid crystal display drive circuit from video data RAM before, temporarily be stored in this latch earlier, data are latched when rising edge clock signal.This latch action of display ON/OFF instruction control can not influence the data among the video data RAM.

The course of work of HD61202 is as follows:

Single-chip microcomputer U6 will visit HD61202, and at first the content of reading state word register mainly is " Busy " sign that will differentiate in the status word; Be expressed as at 0 o'clock at " Busy " sign, single-chip microcomputer U6 can visit HD61202.When write operation, the data latching that HD61202 sends single-chip microcomputer U6 under the effect of single-chip microcomputer write operation signal advances in the input register, make under its control that forwards the HD61202 internal clocking to, HD61202 blocks the I/O impact damper simultaneously, putting " Busy " zone bit is 1, and the information of the data that HD61202 just sending in processing single chip is provided to single-chip microcomputer.The D/I state that HD61202 provides when the write data according to single-chip microcomputer is sent the content of input register into order register and is handled or the display-memory units corresponding, after finishing dealing with, HD61202 will cancel the blockade to the I/O impact damper, with the zero clearing of " Busy " zone bit, represent that to single-chip microcomputer HD61202 has been ready to receive next operation simultaneously.

When reading video data, single-chip microcomputer U6 will have the time-delay in an operating cycle, i.e. the process of " sky is read ".This is because under the single-chip microcomputer read operation, HD61202 provides output register current data to data bus, and when read operation finishes, the data of the display-memory unit of current address pointer indication are write in the output register, simultaneously column address counter is added 1.That is to say that single-chip microcomputer is not directly to read the display-memory unit, but read a distributor---the data of output register.And these data are the contents that are deposited into output register after the last read operation, and these data may be the contents of a last address location, also may be the contents of a certain unit before the address modification.

The steering order of Liquid Crystal Module has 7: show ON/OFF, page or leaf is set (PAGE1～PAGE8), read states, the beginning display line is set, column address Y is set, writes video data, reads video data.

1. monitor switch

R/W	D/I	DB7	DB6	DB5	DB4	DB3	DB2	DB1	?DB0
										0	1	0	0	1	1	1	1	1	?D

D: display screen is opened or the closing control position.During D=1, display screen is opened; During D=0, then display screen is closed, but shows that the number district still is stored among the DDRAM.

2. page or leaf (x address) is set

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

0

1

0

1

A

?A

X address AAA (scale-of-two) of display random access memory data is set at the X address register.After being provided with, read/write is all carried out in this specific page, carries out toward nextpage after nextpage is provided with again, and this instruction is provided with the content of page address X address register.HD61202 is divided into 8 pages with display-memory, and AAA will determine current chosen page address exactly in the instruction code, and span is 0～7H, represents 1～8 page.

3. read states

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

1

0

Busy

0

ON/OFF

Reset

0

?0

Busy: represent current HD61202 interface control circuit running status.Busy=1 represents that HD61202 just is being busy with handling instruction or the data that microcontroller is sent.This moment, interface circuit was blocked, and can not accept any operation except that read states; Busy=0 represents that the HD61202 interface control circuit has been in idle condition, waits for the visit of microcontroller.

ON/OFF: represent current show state.ON/OFF=1 represents to close show state; ON/OFF=0 represents out show state.

Reset: when the Reset=1 state, HD61202 is in the duty that resets; When the Reset=0 state, HD61202 is a normal operating conditions.

4. demonstration begin column

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

0

1

A

?A

This instruction is provided with the content that shows the initial row register.The managerial ability that HD61202 has 64 row to show, AAAAAA (scale-of-two) is for showing the address of initial row in this instruction, and value is in 0～3FH (1～64 row) scope, and it has stipulated to push up most on the display screen row address of the pairing display-memory of delegation.Revise at interval the content that (as add 1 or subtract 1) shows the initial row register equally spacedly if fix time, then display screen will present the displaying contents display effect of smooth rolling up or down.

5. Y address is set

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

0

1

A

?A

This instruction is provided with the content of Y address counter, a certain element address on a certain page of AAAAAA=0～3FH (1～64) representative, once reading or writing data and will carry out on this unit subsequently.The Y address counter has and adds a function automatically, and it will add one automatically after read/write data each time, so when carrying out read/write data continuously, the Y address counter needn't all be provided with once at every turn.Being provided with of the setting of page address and column address decided the display-memory unit uniquely, made the gating of address for the read/write of afterwards video data.

6. write video data

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

0

1

D

?D

This operation writes 8 bit data in the previous fixed display-memory unit, and after operation was finished, column address added 1 automatically.

7. read video data

R/W

D/I

DB7

DB6

DB5

DB4

DB3

DB2

DB1

?DB0

1

D

?D

The content of the output register of HD61202 interface portion is read in this operation, and address counter adds 1 automatically then.

The utility model is built-in 16X16 dot matrix Chinese character library file in two AT24C1024 chips, the Chinese character base file is 256KB altogether, two chip blocks are respectively preserved 128K, during operation, program obtains region-position code according to Hanzi internal code, extract Chinese character dot matrix according to region-position code from the hardware character library again, the character library dot matrix that is extracted further is converted to the liquid crystal display Chinese character again and shows needed form, is presented on the LCDs.When showing Chinese character, no longer need to use and to extract fixedly Chinese character font with the special Zemo (for example Zimo software) of getting.

The low pressure difference linearity LED chip for driving of Sipex company is different with traditional LED chip for driving, it does not need supply voltage is boosted driving LED, but a kind of constant-current LED chip for driving based on step-down, owing to need not to boost, so peripheral circuit is very simple, do not need inductance and electric capacity, only need a resistance setting to flow through the electric current of LED.SP7611 drives 4 LED, SP7611A is the LED chip for driving of irritating current mode, the electric current that flows through the electric current of LED and be provided with in the resistance R is proportional, and great advantage is to use simple, and peripheral circuit only needs a resistance that is used for being provided with electric current.If need to regulate LED brightness, regulate brightness by CTRL pin input pwm signal.The timer pin T1 output of pwm signal by single-chip microcomputer, by the dutycycle of software setting PWM to reach the purpose of control brightness.The frequency of this pwm signal is 500Hz-105kHz.

Registration plate of the present utility model, need the large-capacity data storage,, do not have the address bus of abundant pin as external data memory because the number of pins of single-chip microcomputer U6 is all less relatively, so the utility model utilizes Serial Peripheral Interface (SPI) (SPI) expansion large capacity data memory.

AT45DB081 is the FLASH data-carrier store of the compatible SPI of Atreel company release.There are 4096 pages, every page 264 bytes inside, amounts to the main memory capacity of 8MB and the SRAM data buffer of 2 264 bytes.AT45DB081 comprises serial input SI, serial output SO, serial clock SCK by a three-wire interface, conducts interviews under the cooperation of chip selection signal.The primary memory page or leaf reads instruction and can carry out read operation to any page or leaf in 1024 pages, and command code is: 8 bit manipulation sign indicating numbers, 5 reserve codes, 10 page address sign indicating numbers, start address sign indicating number in 9 pages or leaves, 32 irrelevant sign indicating numbers; Operational code is 52H or D2H, 5 reserve codes are used for compatible up and down to slice, thin piece, 10 page address sign indicating numbers are used for determining which page or leaf to primary memory operates, and the start address sign indicating numbers are determined the start address of operation in the page or leaf in 9 pages or leaves, and back 32 irrelevant yard is used for matching timing.Single-chip microcomputer U6 is to the serial clock pin SCK of AT45DB081 tranmitting data register signal, and pilot operationp sign indicating number and address code are from serial input pin SI write device, and the next clock period after last writes, data will be exported from serial output pin SO in the page or leaf.

Whether single-chip microcomputer comes the judgment data storer idle by the busy-idle condition pin BUSY that the PB0 mouth reads AT45DB081, if BUSY was 1 expression storer free time, otherwise the expression storer is busy.When storer is idle, export 0 chip selection signal CS as data-carrier store by the PB4 pin.After choosing data-carrier store, send command word by spi bus and finish corresponding read-write operation AT45DB081.

HT1380 is that a kind of of HOLTEK company development can provide year, month, day, hour, min, second equal time information, and can revise the serial real-time clock chip of every month fate and leap year information automatically.An external 32.768k Hz crystal oscillator can provide accurate time-base signal, so that accurately timing.In order to reduce the pin of chip number, HT1380 adopts serial i/O load mode to be connected with single-chip microcomputer, and communicates in the synchronous serial communication mode.So just only need three pins of RST (resetting), SCL K (serial clock) and I/O (bi-directional data transmission).Data transmit can adopt " byte " load mode that once only transmits a byte, or once transmits " multibyte " load mode of 8 bytes.

The inner structure of HT1380 chip is made of four parts:

First is data shift register and register array: the former is used for communicating by letter with external series and realizing serial/parallel and parallel/serial conversion; The latter is used to deposit information such as time and date;

Second portion is the order steering logic: be used for the explanation to address/command byte, with read operation, write operation or the write-protect of control to clock register, the duty of control chip;

Third part is a real-time clock: produce year, month, day, hour, min, second equal time information that can read at any time for single-chip microcomputer, and revise automatically the leap year and the leap month;

The 4th part is base oscillator and frequency divider, for clock circuit provides the precise time benchmark.

Before transmitting data, the RST end is changed to high level, and one 8 order of the bit word is sent into steering logic so that register address and command information to be provided.Behind the input command word, write or from corresponding registers readout clock/calendar data to corresponding registers with serial mode.After data transmitted and finish, the RST pin was set to low level.All data are in input of time clock SCLK rising edge and negative edge output.Finish a secondary data and transmit, the byte pattern needs 8+8=16 time clock, and the multibyte pattern needs 8+8 * 8=72 time clock, and the data of I/O transmit since the 0th.

The transmission of each data all will have a command word to indicate which kind of operation (reading and writing or test) which register is carried out and adopt which kind of transfer mode (byte pattern or multibyte pattern).The command word structure is:

7	6	5	4	3	2	1	0
								1	0	0	A3	A2	A1	A0	R/W

A0～A2: register address,

A3:1 is a test pattern, and 0 is general mode,

R/W:1 is for reading mode, and 0 is WriteMode.

The RST pin is used to activate HT1380.When the RST input end was high level, on-chip control logic was started working, and command word can serial enter shift register.The RST pin also is used to be provided with transfer mode (byte pattern or multibyte pattern).From SCLK pin input be a clock pulse sequence, write fashionablely in data, have only when SCLK is negative edge data effective; When data are read, have only when SCLK is rising edge data effective.When the RST input end is low level, stop transmitting all data, the I/O pin keeps high-impedance state.

Consider the environment for use under the mine, when directly using keyboard to operate to the designing requirement of keyboard than higher, so keyboard of the present utility model adopts wireless mode, a little receiver window is arranged on the explosion-proof casing, corresponding with the position of infrared receiving diode PH302B, the fireboss uses the infrared remote control keyboard to carry out the information typing;

The infrared receiving module that is made of GL3276A as shown in Figure 2, be characterized in to reduce taking to greatest extent to single-chip microcomputer U6 hardware interface resources, only use a root interface line, the output of infrared receiving chip GL3276A is connected to the interruption input port of single-chip microcomputer U6, just can realize the function of Wireless Keyboard.

The infrared remote control keyboard can adopt prior art, and the infrared remote control keyboard that is made of integrated circuit (IC) chip PT2248 as shown in Figure 8.00H～09H is a numerical key, and 0AH is a reset key, and 0BH is a cancel key.

Infra-red remote control keyboard radiating circuit adopts pulse-time modulation (PPM) mode, and telecommand is modulated into pulse train, and drives infrared transmitting tube and send with the form of light pulse.Telecommand is:

C1

C2

C3

H

S1

S2

D1

D2

D3

D4

D5

C1, C2, C3 are user codes, and at T1, T2 behind the access diode, then represents C1 between T3 and the CODE, and C2, C3 are high level " 1 ", do not connect diode and then represent low level " 0 ", C1C2C2=111 among Fig. 2.D1, D2, D3, D4, D5, D6 are the numeric data codes that sends,

The dutycycle of the waveform positive pulse of PT2248 telecommand is 1/4 interval scale " 0 ", and the dutycycle of positive pulse is 3/4 interval scale " 1 ".

No matter " 0 " still is " 1 ", and positive pulse is modulated on the carrier wave during emission, and the dutycycle of carrier wave is 1/3, helps reducing power consumption like this.Each transmission cycle is pressed C1, C1, and C2, H, S1, S2, D1, D2, D3, D4, D5, the order serial of D6 sends, and total length is 48a, and wherein a is 1/4 of every bit code cycle, and its size is: a=192/fosc second=192/455KHE=0.422ms.When pressing among 00H～0BH certain key, output pin TXOUT sends 12 bit codes in two cycles, and it is spaced apart 80a.

After the infrared receiving diode PH302B of GL3276A receives the infrared signal of the telecommand that has carrier wave, amplify, amplitude limit and detection, detect the pulse envelope of telecommand, the elimination carrier wave obtains the pulse signal of telecommand, through the shaping of 74LS14 schmitt inverter, the dutycycle that obtains the waveform positive pulse of telecommand pulse signal is 1/4 representative " 1 ", and the dutycycle of waveform positive pulse is 3/4 representative " 0 ".Because every bit code all is the cycle with 4a, every initial always by high level to low level, therefore the process of decoding can be with the interrupt request singal of the initial edge conduct/INT4 of every bit code, pass/INT4 interrupts after the interrupt response, a/2 then delays time, a again delays time, respectively at 3a/2,5a/2,7a/2 samples constantly, and " 0 " that receives is by ' low Gao Gaogao ' forms, " 1 " is made up of ' low low high ', open after finishing when 7a/2 samples constantly/INT4 interrupts, and for the sampling of next bit code is prepared, interrupts 24 times (serial 12 bit codes in two cycles) up to/INT4.Interrupt service subroutine begins to preset sample sign indicating number 0FH, respectively at a/2, and 3a/2,5a/2,7a/2 samples to the output signal of infrared receiving chip GL3276A constantly, if high level keeps the sample sign indicating number constant, if low level sample sign indicating number relevant position 0, at last the sample sign indicating number is deposited in the ram cell of appointment.

The DS1820 digital temperature sensor is sent into 9 scale-of-two temperature informations DS1820 or is sent from DS1820 from one-wire interface, therefore from the single-chip microcomputer to DS1820, only need a data line, from-55 to+125 degrees centigrade of the measurement ranges of DS1820, increment size is 0.5 degree centigrade, can in 1 second, become numeral to temperature inversion, each DS1820 comprises 64 unique long sequence numbers, this sequence number value leaves among the ROM (ROM (read-only memory)) of DS1820 inside, beginning 8 is the product type coding, coding is 10H, then 48 are the unique sequence numbers of each device, last 8 is CRC (cyclic redundancy check (CRC)) sign indicating number of 56 of fronts, also be useful on two 8 bit memory RAM that store the temperature value that records among the DS1820, be numbered No. 0 and No. 1, the symbol of No. 1 storer storage temperature value is if temperature is for negative, then No. 18 of storer is 1 entirely, otherwise is 0 entirely.No. 0 storer is used for the complement code LSB of storage temperature value, each sheet DS1820 has its 48 unique bit sequence number in its ROM, before dispatching from the factory, write in the sheet among the ROM, single-chip microcomputer must insert DS1820 one by one before entering running program, with reading ROM (33H) order this sequence number is read and logined.

The The software prior art of this product mainly comprises: show settings, information typing, information thumb, the time real demonstration; (a) show that setting comprises: display mode (fixing, rolling), time are provided with;

(b) information typing: mainly be to receive the infrared remote control instruction, the time of data message that the typing fireboss measures and information typing, the time of the each entry information of fireboss is automatically recorded by Single Chip Microcomputer (SCM) system timing, fixed point, provide the standard time by clock chip, do not need outside input, therefore can not occur faking, be convenient to supervision, management.

(c) information is thumbed: thumb former information typing history, minimumly can thumb the measurement data of typings and typing personnel's information in 2 weeks;

(d) the real demonstration time: enter the information show state immediately;

The hardware resource that this product has reduced in design to greatest extent to Single Chip Microcomputer (SCM) system takies, other port that does not have to use of single-chip microcomputer U6 is reserved as subsequent development, subsequent development partly comprises methane/CO measurement, communication module, warning output, the function of mainly finishing is: actual measured amount during (1) on-the-spot methane/CO, (2) realize detecting the network networking with downhole safety, (3) realize sound and light alarm.

Claims

1. one kind is applicable to the multifunctional information registration plate in the inflammable and explosive environment, by the power module that is encapsulated in the sealing explosion-proof casing, Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, data memory module is formed, power module is connected with the intrinsic safety electric source of explosion-proof casing outside, power module is a Liquid Crystal Module, microcontroller, the Chinese character base file memory, clock module, temperature-measuring module, infrared receiving module, the data memory module power supply