CN201611264U

CN201611264U - Small data collector

Info

Publication number: CN201611264U
Application number: CN2009201974725U
Authority: CN
Inventors: 戴学利; 张智渊; 王长法; 桑龙
Original assignee: HANGZHOU DINGLI ENVIRONMENTAL TECHNOLOGY Co Ltd
Current assignee: Hangzhou hash Environment Technology Co., Ltd.
Priority date: 2009-10-10
Filing date: 2009-10-10
Publication date: 2010-10-20
Anticipated expiration: 2019-10-10

Abstract

A small data collector includes an ARM processor as well as a small-power voltage-stabilizing circuit connected with the ARM processor, an A/D conversion circuit, a flash memory, an RS-232/RS-485 signal processing circuit, a counter, a switching value input and output circuit and a real-time clock, wherein the A/D conversion circuit is connected with the ARM processor through an SPI full duplex serial interface; the flash memory is connected with the ARM processor through an I2C bus; the counter uses the ARM external interrupt to count; the switching value input and output circuit is connected with the ARM processor through an I/O port; the RS-232/RS-485 signal processing circuit is connected with the ARM processor through an asynchronous serial port UART; and the real-time clock has the ARM built-in function. The data collector has generality and universality, and can be used for an integrated system requiring A/D conversion, on-off control and counter; and the cost is reduced, and the production is easy.

Description

A kind of small-sized number is adopted instrument

Technical field

The utility model belongs to information data collection and tranmission techniques field, is specifically related to be used for the environment protection digital acquisition instrument that the environment monitoring system uses.

Background technology

Traditional number is adopted instrument and is formed by cabinet, power supply, mainboard, 8 tunnel analog quantity load module ADAM-4017 or RemoDAQ-8017, digital quantity I/O modules A DAM-4050 or RemoDAQ-8050 or by counter ADAM-4080,2 RS-232/RS-485 converters and GPRS DTU.Because it is more that number is adopted the instrument parts, make its inner structure complexity, volume is bigger, and these parts can directly buy by market, and especially 8 tunnel analog quantity load module ADAM-4017, data acquisition module ADAM-4050 and ADAM-4080 have separately CPU, RS-232 or RS-485 signal processing circuit, power supply stabilivolt circuit and external packing separately etc.At this moment number is adopted instrument and lack technical advantage on the market competitiveness, and cost obviously increases.

China utility model patent CN201177869 (open day 2009.01.07) provide " a kind of environmental protection number is adopted instrument ", by MCU, connected jtag interface circuit and DC/DC insulating power supply are formed, the peripheral I/O mouth grouping of MCU is connected with the MCU supervisory circuit, real time clock circuit, storer, flash memories, the analog quantity input interface, the switching value output interface, R232/485 serial port module and preinstalled circuit, another group I/O mouth connects switch value input interface by photoelectric coupled circuit, the R232/485 serial port module connects a R232/485 bus, hangs with several serial interfaces on the R232/485 bus; First serial in the serial interface connects the GPRS/CDMA wireless module.This structure environmental protection number is adopted instrument, has multi-analog, digital quantity and serial ports input, can connect various sensors; Image data can not lost; Be enough to satisfy data closely and long-distance transmissions; Can select the kind and the quantity of image data, have strong practicality.But with DSP as digital signal processor, though data-handling capacity is strong, the cost height, power consumption is high, in environmental protection technical field, needs a large amount of numbers that use adopt instrument, the too high universal use that influences product of cost.

Summary of the invention

For solving the defective that above-mentioned existing mode number is adopted instrument, the utility model provides a kind of inner structure simple, and volume is less, high-performance, cheapness, the low number of power consumption are adopted instrument.

For realizing the utility model purpose: adopt following technical scheme:

A kind of small-sized number is adopted instrument, it is characterized in that comprising arm processor and connected miniwatt mu balanced circuit, A/D change-over circuit, flash memories, RS-232/RS-485 signal processing circuit, counting circuit, real-time clock and switching value imput output circuit, the A/D change-over circuit by the SPI full-duplex serial interface be connected with arm processor, flash memories passes through I ²The C bus is connected with arm processor, and counting circuit is counted with the external interrupt of ARM; Real-time clock is the build-in function of ARM, adds that external crystal-controlled oscillation realizes function; The switching value imput output circuit is connected with arm processor by universaling I/O port, and the RS-232/RS-485 signal processing circuit is connected with arm processor by asynchronous serial port UART.

Described RS-232 has the serial port connection terminal, and serial port is RX, TX and the three-way semiduplex mode of GND.

Described RS-232 signal processing circuit and RS-485 signal processing circuit comprise that overlapping a, communication port connects together, and two kinds of signals are selected one UART as required.

Described first serial port is downloaded mouth as the ARM program.

Hang with several serial interfaces on the described RS-232/RS-485 signal processing circuit, GPRS DTU module is plugged on GPRS DTU socket, be connected to arm processor by GPRS DTU serial port, first serial in the serial interface connects GPRS DTU module, and promptly GPRS DTU serial port is connected with first serial ports.

Further, the small-sized number of the utility model is adopted instrument and is also comprised GPRS DTU module, and GPRS DTU module is plugged on the GPRS DTU socket, is connected to arm processor by serial port.

Further again, the asynchronous serial port UART0 of ARM is connected to the RS-232 signal processing circuit; UART1 is connected to RS-232 signal processing circuit and RS-485 signal processing circuit simultaneously, according to the outside need signal of can choosing any one kind of them.

All parts of the utility model all concentrate on work under the processor, make several instrument structures of adopting perfect, and good looking appearance is with low cost, the lifting of making a breakthrough property of the market competitiveness.

The utility model A/D change-over circuit is gathered analog quantity can be divided into third gear :-10～+ 10V ,-5～+ 5V and-2.5～+ 2.5, the precision of so effective raising integrated system data.The function of all kinds of needs is concentrated on work under the processor, improved the integration density of integrated system, simplified subelement simultaneously, reduced cost.The utility model also can be used as data acquisition unit and applies in other integrated system, can improve the integration density of integrated system equally, reduces the cost of integrated system, makes the integrated system structure more succinct, compact.

Compared to existing technology, the utility model has following technique effect:

(1), has versatility, the utility model can be applied to the overwhelming majority to be needed in the integrated system of A/D conversion, switch control sum counter, and the agreement that it adopts is the Modbus rtu protocol of international standard, and the integration of finishing equipment smoothly for integrated system brings great convenience.

(2), have universality: integrated system comprises the use of conversion, data processing and the switching value of modulus substantially, so in most integrated systems, can be applied to it.

(3), cost reduces: the integrated system than said function has reduced 1 or 2 CPU and part auxiliary circuit, for example: the peripheral circuit of CPU, power supply stabilization circuit, RS-232 or RS-485 signal processing circuit etc.It has finished same function with original 1/3rd expense.The control performance of ARM chip is stronger, and ARM is mainly used in control and a spot of data processing in embedded system.Like this, one side requires CPU to want low-power consumption and has enough clock frequencies to come the operation system, to satisfy portable requirement; Also require its interface that enough kinds are arranged on the other hand, be beneficial to the expansion of performance.ARM can shorten the time of application development and test effectively, has also reduced the research and development expense.

Description of drawings

Fig. 1 is the utility model circuit block diagram;

Fig. 2 adopts the practical circuit diagram first of instrument for the utility model number;

Fig. 3 adopts the practical circuit diagram second portion of instrument for the utility model number;

Fig. 4 adopts the practical circuit diagram third part of instrument for the utility model number;

Fig. 5 adopts practical circuit diagram the 4th part of instrument for the utility model number;

Fig. 6 adopts practical circuit diagram the 5th part of instrument for the utility model number.

Embodiment

Below in conjunction with Figure of description the utility model embodiment is described further:

As Fig. 1, number is adopted instrument and is made up of shell and internal expansion module,

Internal expansion module mainly is made up of A/D change-over circuit, switching value imput output circuit, counting circuit, RS-232 and RS-485 signal processing circuit (or RS-232) and real-time clock, and all functions circuit is with same arm processor deal with data.

Its course of work is: the electric energy that each circuit operation is provided by the miniwatt mu balanced circuit; The A/D change-over circuit by the SPI full-duplex serial interface be connected with arm processor, the EEPROM data storage circuitry passes through I ²The C bus is connected with arm processor; The switching value imput output circuit is connected with arm processor by universaling I/O port; Counting circuit is the interruption EINT function of ARM; RS-232 is connected with arm processor by asynchronous serial port UART with the RS-485 signal processing circuit; Real-time clock is the built-in function of ARM.

Arm processor collection and read the data-signal of each circuit forms the data stream of standard Modbus rtu protocol.

That wherein ARM selects for use is LPC2144.

At 20 (NTRST), 60 (TDI), 52 (TMS), 56 (TCK), 24 (RTCK), 64 (TDO) and 57 (NRESET) pin of ARM interface circuit, for the ARM emulation and the use that downloads as J4.

19 (TXD0) of ARM, 21 (RXD0) pin connect serial port circuit U 4 (MAX3232), make up first serial port, and first serial port can be for the ARM usefulness that downloads.

33 (TXD1) of ARM, 34 (RXD1) pin connecting circuit U4 and U5 (SP3485E) make up second serial port or RS-485.

3,4 of ARM is connected crystal oscillator Y2 with 49 pin, realizes that the hardware of real-time clock connects.

26 (SDA0) of ARM, 22 (SCL0) pin connect memory circuit U3, realize data storage.

The P1.16 of ARM, P1.17, P1.18 and P1.19 are connected the switching value output circuit; The P0.10 of ARM, P0.11, P0.12 and P1.23 are connected the switching value input circuit.

13,14,15,27,28,29,30 of ARM is connected the A/D change-over circuit with 31 pin.

45 (EINT2) pin connection count circuit of ARM.

Mu balanced circuit is made up of elements such as U6 (LT1117), U7 (MC34063A), U8 (A0515S), U9 (LM79L05), U11 (LM78L05AC) and peripheral circuits.

The A/D change-over circuit is made up of U101 (AD620), U102 (ADG508A), U103 (ADG508A), U107 (74HCT125), U117 (AD7712) and peripheral circuit.

Serial port connection terminal (P_UART1 and P_UART0) and external power source connection terminal (J_POWER) are installed in the upper end of monoblock circuit board.Serial port is three-way semiduplex mode (RX, TX, GND); External power source and miniwatt mu balanced circuit are formed mu balanced circuit.

Serial port connection terminal and RS-485 connection terminal (P_UART0) are shared, and wherein UART1 is overlapping.UART1 can select one in two kinds of signals as required.

GPRS DTU module is inserted on the GPRS DUT socket (J1), and (J2) is connected to arm processor by serial port.

The lower end that number is adopted instrument is equipped with switching value input (J_IN1) and output wiring terminal (J_OUT1) and 8 road A/D converting analogue amount input wires terminals (J_AIN1 and J_AIN2).

Claims

1. a small-sized number is adopted instrument, it is characterized in that comprising arm processor and connected miniwatt mu balanced circuit, A/D change-over circuit, flash memories, RS-232/RS-485 signal processing circuit, counting circuit, switching value imput output circuit and real-time clock, the A/D change-over circuit by the SPI full-duplex serial interface be connected with arm processor, flash memories passes through I ²The C bus is connected with arm processor, counting circuit is counted with the external interrupt of ARM, the switching value imput output circuit is connected with arm processor by universaling I/O port, and the RS-232/RS-485 signal processing circuit is connected with arm processor by asynchronous serial port UART, and real-time clock is the ARM build-in function.

2. small-sized according to claim 1 number is adopted instrument, it is characterized in that described RS-232 has the serial port connection terminal, and serial port is RX, TX and the three-way semiduplex mode of GND.

3. adopt instrument as small-sized number as described in the claim 2, it is characterized in that RS-232 signal processing circuit and RS-485 signal processing circuit comprise that overlapping a, communication port connects together, two kinds of signals are selected one UART as required.

4. adopt instrument as small-sized number as described in the claim 3, it is characterized in that first serial port downloads mouthful as the ARM program.

5. adopt instrument as small-sized number as described in the claim 4, it is characterized in that hanging with on the RS-232/RS-485 signal processing circuit several serial interfaces, GPRS DTU module is plugged on GPRS DTU socket, be connected to arm processor by the GPRSDTU serial port, first serial in the serial interface connects GPRS DTU module, and promptly GPRS DTU serial port is connected with first serial ports.