CN200956198Y

CN200956198Y - Data acquisition and liquid crystal display module

Info

Publication number: CN200956198Y
Application number: CN 200620093366
Authority: CN
Inventors: 张利国
Original assignee: Shenyang Scientific Instrument R&D Center of CAS
Current assignee: Sky Technology Development Co Ltd
Priority date: 2006-09-22
Filing date: 2006-09-22
Publication date: 2007-10-03
Anticipated expiration: 2016-09-22

Abstract

The utility model discloses a data collection and LCD module, which includes a single-chip microcomputer communicated with an upper computer through the interface, the first to the eighth operational amplifiers with the input connected to the eight-circuit analog signal and the output connected to an AD data converter, the AD data converter which converts the analog signal from the first to eighth operational amplifiers into digital signal and is connected with the single-chip microcomputer through the bus; a real-time clock which is connected with the single-chip microcomputer through the SPI bus, an LCD interface which is connected with the single-chip microcomputer through the data bus with the output connected to the LCD and to a video memory through a logic device, and also with a switch negative pressure generator which is connected with the LCD interface; and a watchdog, EEPROM and a voltage monitor which are connected with the single-chip microcomputer. The module adopts electronic switch, automatically operates and may realize eight-channel data collection.

Description

Data acquisition and LCD MODULE

Technical field

The utility model relates to the intelligence instrument field, specifically a kind of data acquisition and LCD MODULE.

Background technology

In the intelligence instrument field, data acquisition, demonstration and and the communication interface of host computer essential.In original display technique of high energy electron rifle power supply, with charactron as display element, because the information that charactron shows is few, video data adopts the mode of mechanical switch to switch, but in the handoff procedure because mechanical contact sparking etc. very easily causes gauge outfit to burn, owing in the sampled data high-pressure sampling data are arranged, be badly in need of a kind of novel data acquisition, demonstration and the intelligent object that can carry out communication simultaneously with host computer.

The utility model content

The purpose of this utility model provides a kind of data acquisition and LCD MODULE, and it adopts electronic switch, implements automatically and can realize eight channel data collections.

To achieve these goals, technical solution of the present utility model comprises:

-single-chip microcomputer is communicated by letter with host computer by interface;

-the first～eight operational amplifiers, its positive terminal connects 8 road input end of analog signal respectively, forms 8 tunnel simulating signal input channels, and output terminal is connected to the input end of AD data converter respectively;

-AD data converter will become digital signal from the analog signal conversion of the first～eight operational amplifier after bus links to each other with single-chip microcomputer;

-real-time clock links to each other with single-chip microcomputer through spi bus;

-LCD interface, the choosing of its address, sheet, read-write end link to each other with single-chip microcomputer by data bus respectively, export LCD to, and through the logic device to the video memory device;

-switch negative pressure generator links to each other with the LCD interface;

-house dog, EEPROM and voltage monitor link to each other with single-chip microcomputer;

Wherein said the first～eight operational amplifier is a homophase high resistant voltage follower structure; Described switch negative pressure generator is made up of switching voltage transducer and peripheral circuit; Described real-time clock links to each other with the EEPROM of single-chip microcomputer through spi bus, and real-time clock links to each other with backup battery.

Compared with prior art, the utility model has more following beneficial effect:

1, adopts electronic switch, have automatic switching function, thoroughly solved the problem that the mechanical contact sparking causes gauge outfit to burn, be applicable to the sampling of high-pressure sampling data.

2, adopt import technical grade LCDs, data display area area big (LCD resolution is 320 * 240) can show 8 tunnel sampled datas simultaneously, and data variation and result come into plain view.

3, have 8 circuit-switched data acquisition function simultaneously, data acquisition time is short, and uses single-chip microcomputer to carry out digital filtering, can adapt to different application field and abominable working environment, and antijamming capability is strong.

4, have digital communication interface, be easy to carry out data transmission, data remote can be easy to realize remote monitoring by the RS485 bus with host computer.

5, convenient, light-duty.Because the utility model adopts obedient piece element, the anti-vibration ability is strong, and volume is little, and interface is simple and convenient.

6, the utility model has been avoided the switching mode of 8 road video data mechanical switchs, has avoided in the handoff procedure because gauge outfit is burnt in mechanical contact sparking etc.

7, the utility model can be realized data acquisition high-pressure sampling, liquid crystal display and and upper machine communication.

Description of drawings

Fig. 1 is the utility model block diagram.

Fig. 2 is the utility model circuit liquid crystal drive and interface principle figure.

Fig. 3 is the utility model circuit single-chip microcomputer and peripheral device interface principle figure.

Fig. 4 is the utility model circuit input channel interface principle figure.

Fig. 5 is an embodiment negative pressure generator of the utility model circuit theory diagrams.

Fig. 6 is an embodiment inverter circuit of a utility model schematic diagram.

Embodiment

Below in conjunction with accompanying drawing and example the utility model is described in further detail.

Embodiment 1

The utility model is made up of the first～eight operational amplifier (U6A, U6B, U7A, U7B, U8A, U8B, U9A, U9B), AD data converter (U10), RS232 serial communication interface (U12), RS485 interface (U18), real-time clock (U2), LCD interface (U3), video memory device (U5), single-chip microcomputer (U1), house dog, EEPROM and voltage monitor (U11).Specifically be connected to: the first～eight operational amplifier (U6A, U6B, U7A, U7B, U8A, U8B, U9A, U9B) 3 pin or 5 pin are respectively through being connected in series second resistance R 2, the 4th resistance R 4, the 6th resistance R 6, the 8th resistance R 8, the tenth resistance R 10, the 12 resistance R 12, the 14 resistance R 14, the 16 resistance R 16 connects 8 road input end of analog signal, input end links to each other with eight input channels respectively, itself be designed to high resistant emitter follower mode as the homophase input amplifier, form 8 tunnel simulating signal input channels, the first～eight operational amplifier (U6A, U6B, U7A, U7B, U8A, U8B, U9A, U9B) 3 pin or 5 pin are respectively through first resistance R 1, the 3rd resistance R 3, the 5th resistance R 5, the 7th resistance R 7, the 9th resistance R 9, the 11 resistance R 11, the 13 resistance R 13, the 15 resistance R 15 connects high level, and output terminal will import respectively ± and the 5V analog signal conversion becomes the standard analog signal of 0～5V; The first～eight operational amplifier (U6A, U6B, U7A, U7B, U8A, U8B, U9A, U9B) negative pole end links to each other with output terminal, form homophase high resistant voltage follower, AIN0～AIN7 that conditioning back signal inputs to AD data converter (U10) through resistor chain R17 through the output terminal of the first～eight operational amplifier (U6A, U6B, U7A, U7B, U8A, U8B, U9A, U9B) is totally 8 road input end of analog signal.8 tunnel simulating signals convert digital signal to through AD data converter (U10) and link to each other with single-chip microcomputer (U1) through spi bus (ADCLK, ADDI, ADDO network identity in referring to Fig. 2).The single-chip microcomputer serial communication interface links to each other with RS232 serial communication interface (U12) or RS485 interface unit (U18), 1,4 pin of RS232 serial communication interface (U12) 12,11 pin or RS485 interface unit (U18) link to each other with 10,11 pin of single-chip microcomputer respectively (referring to TXD, RXD network identity), form serial communication interface, can be connected with host computer or according to RS485 communications protocol composition RS485 communication network according to the RS232 communications protocol.Because the RSS485 communication network is a half-duplex network, it sends with the switching that receives and controls (referring to the CTRL network identity) by single-chip microcomputer (U1) by its 8 pin P1.7 control end, and when P1.7 was high level, transceiver was in accepting state; When P1.7 was low level, transceiver was in transmit status.Single-chip microcomputer sends to host computer through RS232 serial communication interface device or RS485 interface unit with the data that collect, and single-chip data mouth, read-write and A14, A15 address wire link to each other with LCD interface unit (U3); Single-chip microcomputer shows on local liquid crystal display in real time by LCD interface and video memory device;

Single-chip simulation two-way spi bus links to each other with real-time clock device (U2), house dog, EEPROM and voltage monitor (U11) respectively, finishes that clock data reads and the EEPROM data storage.Real-time clock (U2) links to each other with single-chip microcomputer (U1) (referring to IO, CLK, RSC network identity) through spi bus, shows for single-chip microcomputer (U1) provides real-time clock data, date and time; Real-time clock device (U2) by backup battery BT0 power supply, makes clock can continue operate as normal under the situation of outage under the situation that the utility model does not power on.

House dog, EEPROM and voltage monitor (U11) link to each other with single-chip microcomputer (U1) through spi bus, and house dog, EEPROM and voltage monitor provide data space and real time monitoring CPU working condition and power supply voltage for single-chip microcomputer; LCD interface (U3) links to each other with video memory device (U5) (referring to VWR, VA0～VA14 and VD0～VD7 network identity), LCD interface (U3) links to each other with LCD by the J2 pin, LCD interface (U3) data bus (D0～D7) directly connect single-chip microcomputer (U1) number AA according to bus, LCD interface (U3) address wire A0, sheet select CS, read RD and write WR and link to each other with single-chip microcomputer (U1) respectively, and U3VA15, VCE are by logic device U4 link to each other with video memory device (U5) (referring to Fig. 1).LCD adopts 320 * 240 LCD (commercial product), be furnished with negative pressure generator and inverter, form switch negative pressure generator output general+5V voltage transitions one-tenth-22V voltage by switching voltage transducer (U13) and peripheral circuit and supply with LCD interface U3 through the J2 pin, be used to provide negative pressure, regulate by regulating resistance PR1 (see figure 5) degree of comparing; Fig. 6 is inverter U16, joins backlight LB1.

It is that W24257, switching voltage transducer U13 employing MC34063, single-chip microcomputer U1 are that W78E58, house dog, EEPROM and voltage monitor U11 adopt X5045 that the first～eight operational amplifier U6 in the present embodiment～U9 employing LM358, AD data converter U10 adopts TLC2543, RS232 serial communication interface device U12 to adopt MAX232, RS485 interface unit U18 to adopt MAX485, real-time clock device U2 to adopt DS1302, LCD interface unit U3 to adopt SED1335, the video memory device U5 of compatible 3V level.

The utility model principle is: eight tunnel simulating signals are carried out signal condition through the first～eight operational amplifier and are shown in real time on LCD by MCU after the AD conversion, simultaneously in RS232 or the enterprising line data output of RS485 bus.

Relevant comparative example

Most of electron gun power supply of the prior art all adopts traditional charactron display mode, and displaying contents is limited, and is dumb, and the general switch switching mode that adopts of sampling is fragile.

Claims

1. data acquisition and LCD MODULE is characterized in that comprising:

-switch negative pressure generator links to each other with the LCD interface;

-house dog, EEPROM and voltage monitor link to each other with single-chip microcomputer.

2. according to the described data acquisition and the LCD MODULE of claim 1, it is characterized in that: described the first～eight operational amplifier is a homophase high resistant voltage follower structure.

3. according to the described data acquisition and the LCD MODULE of claim 1, it is characterized in that: described switch negative pressure generator is made up of switching voltage transducer and peripheral circuit.

4. according to the described data acquisition and the LCD MODULE of claim 1, it is characterized in that: described real-time clock links to each other with the EEPROM of single-chip microcomputer through spi bus, and real-time clock links to each other with backup battery.