CN201535950U - Handheld bar code meter reading machine - Google Patents

Abstract

The utility model relates to a handheld bar code meter reading machine, which is characterized in that the utility model takes a 32-bit APM processor as a core, and integrates a NandFlash storage, a NorFlash storage, a SDRAM storage, an LCD controller, a USB interface chip, a key scan module, an infrared communication module and a laser bar code module, wherein the NandFlash storage is used for storing meter reading data and charge data of a user, the NorFlash storage is used as an operating system and an application program storage area, the SDRAM storage is used for storing the operating data, the LCD controller drives a data signal of an STN interface liquid crystal screen and provides the bias and backlight high-pressure required by the screen display, the USB interface can realize the data transmission between the meter reading machine and a PC, the key scan module responses to the use input, the infrared communication module carries out the automatic meter reading relative to an infrared electricity meter, and the laser bar code module converts the bar code information into a level signal. The utility model integrates the infrared and laser bar code meter reading, can quickly position to the use by scanning the bar code of the meter box, and can provide an evidence of in place of the meter reading.

Description

A kind of hand-held bar code meter reader

Technical field

The utility model is applied in power industry and checks meter in the flow process.More specifically the say so a kind of person of checking meter of raising meter reading efficiency and satisfy the check meter meter reader of arrival rate demand of the power industry examination person of checking meter.

Background technology

At present, have a lot of occasions still generally to adopt stem-winder and tape sign indicating number but do not have the ammeter of infrared function, for this class ammeter, what generally adopt is that the papery card of checking meter is made a copy of of that month power consumption; And then by the manual entry mode card information typing marketing system of will checking meter.This mode of manually making a copy of will inevitably cause that the person's of checking meter workload is big, cost is high, easily produces a series of problems such as secondary typing mistake.

Common meter reader is simple because of its function, in the process that existing stem-winder is checked meter, searches user profile and then checks meter need be in the meter reader by hand.Though avoided the problem of secondary typing mistake, meter reading efficiency is still very low, whether can't examine checks meter puts in place.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology problem, a kind of hand-held bar code meter reader is provided, it is a kind of hand held terminal unit, with 32 embedded ARM processor is core, integrated infrared and laser bar code is checked meter, can navigate to the user fast, and can be used as the foundation of checking meter and putting in place by the bar code on the scan table case.

The utility model technical solution problem adopts following technical scheme:

The design feature of the utility model hand-held bar code meter reader is to be core with 32 arm processors, integrated NandFlash storer, NorFlash program storage, SDRAM data-carrier store, lcd controller, USB interface chip, key scan module, infrared communication module and laser bar code module; Wherein:

The NandFlash storer is as user's meter reading data and charge data storer;

The NorFlash storer is as operating system and application storage district;

The SDRAM storer is as the service data storer;

Lcd controller drives STN interface liquid crystal display data-signal and bias voltage and the high pressure backlight that screen shows to be needed is provided;

USB interface realizes data transmission between meter reader and PC;

The key scan module, response user input;

Infrared communication module is carried out automatic data logging for infrared ammeter;

The laser bar code module is converted to level signal with bar code information.

The design feature of the utility model hand-held bar code meter reader also is:

Described NandFlash storer, NorFlash storer, SDRAM storer and USB interface chip are connected with 16 bit data bus by 32 bit address buses with arm processor;

Described key scan module detects the button trigger pip by 6 universal I/O port output square wave sweep signals by 4 external interrupt mouths;

Described infrared communication module is connected with the universal serial port UART1 of arm processor;

Described laser bar code module level output is connected on the input interrupt pin of arm processor, and ARM writes down the arrival time at each level edge, and understands bar code.

Compared with the prior art, the utility model beneficial effect is embodied in:

1, the utility model is a kind of hand held terminal unit, is core with 32 embedded ARM processor, and integrated infrared and laser bar code is checked meter, and can navigate to the user fast, and can be used as the foundation of checking meter and putting in place by the bar code on the scan table case.

2, the utility model has any effect at aspects such as structure, uses, please fully excavates, to embody its creativeness

Description of drawings

Fig. 1 is the utility model schematic block circuit diagram.

Fig. 2 is the utility model be used to check meter process flow diagram of operation.

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings:

Embodiment

Referring to Fig. 1, present embodiment is to be the handheld device of core, integrated NandFlash storer, NorFlash program storage, SDRAM data-carrier store, LCD screen controller, USB interface chip, key scan module, infrared communication module and laser bar code module with 32 arm processors.NandFlash is the main storer of user's meter reading data and charge data; NorFlash is used as the memory block of hand-held set operating system and application program; Data-carrier store when SDRAM is program run; The LCD screen controller is used to drive STN interface liquid crystal display data-signal and provides screen to show the bias voltage and the high pressure backlight of needs; USB interface is used for data transmission between meter reader and the PC for meter reader provides the interface that meets USB 1.1 standards; The key scan module is used to respond user's input; Infrared communication module is used for the infrared ammeter that meets DL/T 645-1997 standard promulgated by the ministries or commissions of the Central Government is carried out automatic data logging; The laser bar code module is converted to level signal with the bar code monochrome informatio.NandFlash, NorFlash, SDRAM, USB interface chip and arm processor link together by 32 bit address buses and 16 bit data bus; The key scan module detects the button trigger pip by 6 universal I/O port output square wave sweep signals by 4 external interrupt mouths, goes to the shake back to send press key message to operating system through software then; Infrared communication module then is connected with the universal serial port (UART) 1 of ARM; The output of laser bar code module level is connected on the input interrupt pin of arm processor, and ARM writes down the arrival time at each level edge, understands bar code by software algorithm.

In concrete the enforcement, as shown in Figure 1, arm processor S3C44B0X system clock adopts the starting of oscillation of external 10MHz crystal, arrives 48MHz with inner PLL frequency multiplication again.Arm processor is operated under two kinds of clock frequencies, and under the user key-press preprocessor is operated at full speed the 48MHz frequency, in case current button task is finished dealing with and do not detected new actuation of keys, processor will be operated under the 1.5MHz frequency.This frequency conversion working method has effectively reduced the average power consumption of equipment, has prolonged battery service time.

The data bus interface of considering NorFlash chip SST39VF1601 and SDRAM chip K4S641632K is 16, so the arm processor data-interface is configured to 16 bit patterns.Arm processor will be divided into 8 by every 32M byte between addressed area.The NorFlash chip selection signal is connected on ARM the 0th district's enable pin; The SDRAM chip selection signal links to each other with the 6th district's enable pin.Do the interior data cell of these sheets that extend out chip like this and just can be realized the direct read of data by the ARM addressing.

The data-interface of USB interface chip PDIUSBD12 is 8, and chip the 28th pin (A0) level just to be used to distinguish current 8 bit ports be data word or command word.Arm processor 2 district's data bit widths are configured to 8, and 2 district's enable pin select pin to link to each other with the USB chip slapper, and ARM address wire ADDR1 links to each other with the A0 pin of USB.Being to the USB chip word that reads and writes data to the read-write operation of ARM addressing space 0x05000000 address like this, is read-write to USB chip command word to the read-write operation of address 0x05000002.

The data-interface of NANDFlash chip K9F1208U0B is 8, and chip the 17th pin (ALE) latchs pin for address word; The 16th pin (CLE) latchs pin for command word.Arm processor 1 district's data bit width is configured to 8, and ARM address wire ADDR1 links to each other with ALE; ADDR2 links to each other with CLE.Because chip selection signal must be effective all the time in the read-write cycle of NANDFlash, therefore universal I pin the 116th pin with ARM links to each other with the chip selection signal of NANDFlash.The enable signal in 1 district respectively with the read signal OE of ARM and write signal WE by two or be connected to reading pin 8 and writing on the pin 18 of NANDFlash chip.Read-write is to NANDFlash read write command word to ARM addressing space 0x03000004; Read-write is the write address word to 0x03000002; Read-write is the write data word to 0x03000000.

Shown in Figure 2, for use of the present utility model, the person of checking meter only need be carried a hand-held bar code meter reader, will should plagiarize the family download of information this month in all-in-one in advance before checking meter; The person of checking meter navigates to this family to on-the-spot fast by scanning barcode, and record is checked meter the time as the check meter foundation of arrival rate of the examination person of checking meter automatically; Check meter after the end, the person of checking meter imports to this meter reading data data in the meter reader in the marketing database automatically by USB port and power marketing system interface program.Whole process is convenient, fast, safe, accurate.

Claims (1)

1. hand-held bar code meter reader, it is characterized in that with 32 arm processors be core, integrated NandFlash storer, NorFlash program storage, SDRAM data-carrier store, lcd controller, USB interface chip, key scan module, infrared communication module and laser bar code module; Wherein:

The NandFlash storer is as user's meter reading data and charge data storer;

The NorFlash storer is as operating system and application storage district;

The SDRAM storer is as the service data storer;

Lcd controller drives STN interface liquid crystal display data-signal and bias voltage and the high pressure backlight that screen shows to be needed is provided;

USB interface realizes data transmission between meter reader and PC;

The key scan module, response user input;

Infrared communication module is carried out automatic data logging for infrared ammeter;

The laser bar code module is converted to level signal with bar code information;

Described NandFlash storer, NorFlash storer, SDRAM storer and USB interface chip are connected with 16 bit data bus by 32 bit address buses with arm processor;

Described key scan module detects the button trigger pip by 6 universal I/O port output square wave sweep signals by 4 external interrupt mouths;

Described infrared communication module is connected with the universal serial port UART1 of arm processor;

Described laser bar code module level output is connected on the input interrupt pin of arm processor, and ARM writes down the arrival time at each level edge, and understands bar code.

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