CN207650584U

CN207650584U - A kind of multichannel recording instrument without paper

Info

Publication number: CN207650584U
Application number: CN201721032685.3U
Authority: CN
Inventors: 黄文通
Original assignee: XIAMEN HENGLIDE ELECTRONICS CO Ltd
Current assignee: XIAMEN HENGLIDE ELECTRONICS CO Ltd
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2018-07-24
Anticipated expiration: 2027-08-17

Abstract

The utility model is related to recording instrument without paper fields, especially a kind of multichannel recording instrument without paper, it is using microcontroller as core, numerical value carries out circling measurment outside the microcontroller, data calculate, data are shown, it detects communication data simultaneously and makes corresponding processing, SCM peripheral has peripheral modulate circuit, power module, data memory module, external A/D acquisition modules, data communication module and display module, the power module, data memory module, external A/D acquisition modules, data communication module and display module are connect with the microcontroller respectively, the periphery modulate circuit is connect by analog switch with the external A/D acquisition modules and the microcontroller.The quantity for greatly reducing measuring instrumentss of the utility model has many advantages, such as that observing and controlling is precise and stable and strong antijamming capability, compact to design, at low cost, powerful, and the scope of application is very extensive.

Description

A kind of multichannel recording instrument without paper

Technical field

The utility model is related to recording instrument without paper field, specific field is a kind of multichannel recording instrument without paper.

Background technology

In modernization industry production process, multi-functional recording instrument without paper is mainly used in temperature, pressure, frequency, flow etc. Acquisition, monitoring, record and the processing of the data of site technique parameter are real time monitoring and the process control for realizing industrial process Basis.With the fast development of the new and high technologies such as microelectric technique, computer technology and the network information technology, recorder is also from biography The mechanical analog recorder of system, develops towards multifunction digital recording instrument without paper direction.

Utility model content

The purpose of this utility model is to provide a kind of multichannel recording instrument without paper, circuit structure is relatively simple, cost compared with The higher recording instrument without paper with display of low, circuit safety and reliability.

To achieve the above object, on the one hand the utility model provides the following technical solutions：A kind of multichannel recording instrument without paper, , using microcontroller as core, numerical value carries out circling measurment outside the microcontroller, data calculate, data are shown while detecting logical for it Letter data simultaneously makes corresponding processing, and SCM peripheral has peripheral modulate circuit, power module, data memory module, outside A/D Acquisition module, data communication module and display module, the power module, data memory module, outside A/D acquisition modules, number Connect respectively with the microcontroller according to communication module and display module, the periphery modulate circuit by analog switch with it is described outer Portion's A/D acquisition modules and microcontroller connection.

Preferably, the microcontroller selects S3C6410 chips.

Preferably, the peripheral modulate circuit includes temperature signal regulation circuit, pressure signal conditioning circuit and frequency letter Number modulate circuit.

Preferably, the display module uses 7.0 inches, resolution ratio is the TFT TFT True Color LCD of 800*480.

Compared with prior art, the utility model has the beneficial effects that：The quantity for greatly reducing measuring instrumentss, has The advantages that observing and controlling is precise and stable and strong antijamming capability, it is compact to design, at low cost, powerful, and the scope of application is very extensive.

Description of the drawings

Fig. 1 is the functional block diagram of the utility model multichannel recording instrument without paper；

Fig. 2 is the circuit diagram of the temperature signal regulation circuit of the utility model；

Fig. 3 is the circuit diagram of the pressure signal conditioning circuit of the utility model；

Fig. 4 is the circuit diagram of the frequency signal modulate circuit of the utility model；

Fig. 5 is the power circuit diagram of the utility model；

Fig. 6 is the serial communication interface circuit schematic diagram of the utility model；

Fig. 7 is the ethernet interface circuit figure of the utility model；

Fig. 8 is the external Acquisition Circuit figure of the utility model；

Fig. 9 is the serial EEPROM memory circuit diagram of the utility model；

Figure 10 is the LCD display interface circuit figures of the utility model.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

Referring to Fig. 1, the utility model provides a kind of technical solution：A kind of multichannel recording instrument without paper, with microcontroller For core, microcontroller outside numerical value carries out circling measurment, data calculate, data show while detecting communication data and make phase The processing answered, SCM peripheral have peripheral modulate circuit, power module, data memory module, outside A/D acquisition modules, data Communication module and display module, power module, data memory module, outside A/D acquisition modules, data communication module and display mould Block is connect with microcontroller respectively, and peripheral modulate circuit is connect by analog switch with outside A/D acquisition modules and microcontroller.

The S3C6410 chips that microcontroller choosing is released using Samsung companies in the present embodiment, the chip multi-media processing work( Can be very powerful, it supports the smooth scaling of 2D graph images well, the graphics processing operations such as overturning, can also export simultaneously to It has been shown that, therefore it can complete demand of the recording instrument without paper in terms of image procossing well.

Peripheral modulate circuit includes temperature signal regulation circuit, pressure signal conditioning circuit and frequency signal modulate circuit.

The signal of the recording instrument without paper acquisition thermal resistance PT100 of this implementation, temperature signal regulation circuit are connect using four-wire system Method：5 and 6 two conducting wires are connected in the upper end of thermal resistance PT100, similarly connect 7 and 8 two conducting wires in its lower end, it is such to connect Line method is known as four-wire system connection, as shown in Fig. 2, constant current leads to the I numbers of mistake lead provides electric current to thermal resistance PT100, electricity Resistance signal R is converted into voltage signal U, then secondary meter is connected to 6 and 7 two leads, realizes that high-precision temperature measures.

Pressure sensor needs the voltage of 24V to supply, and the application generates the voltage of 24V, while pressure using Switching Power Supply The signal of sensor output is the current signal of faint 4~20mA, becomes the electricity of 0.5V~2.5V by R97=125 Ω resistance Signal is pressed, is sent in microprocessor by A/D acquisition modules.Pressure differential pressure signal conditioning circuit is as shown in Figure 3.

The major function of frequency signal modulate circuit is exactly to avoid generating interference to system, and pulse signal first has to pass through Phototube Coupling pipe, is connected to core board, by timer and interrupts to combine and calculates to obtain frequency size, wherein 4N25_6 chips be by GaAs infrared light-emitting diode and a kind of economical Guang electricity Said clutchs for hanging phototransistor detector Guang Pro conjunction compositions, isolation Voltage (f=60Hz, t=1)；7500V (peak values of ac) frequency signal modulate circuit is as shown in Figure 4.

Recording instrument without paper is by 220V, 50Hz alternating currents (i.e. alternating current) power supply, by two-way voltage (24V1A/5V1A) every From output switch power source, high and low voltage isolation switch power module obtains voltage 5V and 24V needed for instrument.The power module has Temperature protection, overcurrent protection and short-circuit protection, all risk insurance protective function, the input of AC85~265V Width funtions, the bis- electricity of DC24V1A 5V1A Pressure isolation output.Then 5V passes through the AMS1117-33 that three ends are adjustable or fixed voltage 3.3V output currents are 1A line regulations And its LM2596 and surrounding circuit reconvert of peripheral circuits and 3A electric current output buck switching mode integrated voltage-stabilized chips at D3.3V, A3.3V for needing and -5V, such as ICL7135 needs -5V conducts, the voltage of amplifier needs ± 5V, power circuit is as schemed Shown in 5.

Recording instrument without paper devises serial communication interface circuit, and SP3485 is -485 transceiver of low-power consumption half-duplex RS, complete The requirement of full up foot RS-485 serial protocols, while compatible industry standard specifications.The connection circuit of S3C6410 and SP3485 is as schemed Shown in 6.

The application uses a cost-effective single-chip Fast Ethernet mac controller and fully-integrated DM9000AEP chips, it includes the SRAM of a 4K DWORD value, also gathers around that there are one the adaptive PHY of 10/100M. IEEE802.3x flow controls use full-duplex mode, DM9000AEP to have the function of automatic synchronization, can be automatically performed maximum limit Degree ground is suitble to the configuration of its line bandwidth, ethernet interface circuit figure as shown in Figure 7.

It is higher to required precision due to the selection of some technological parameters but of less demanding to sample rate, so the application External A/D Acquisition Circuits design is increased, the application is using ICL7135 chips as external A/D converter, its A/D conversions Chip is a kind of 4 double integration A/D conversion chips, can have ± 20000 digital quantities to be exported as conversion, is had very convenient Ground microcomputer interface has the binary-coded decimal output of STB gating controls.By conversion, the conversion accuracy of ICL7135 is equivalent to 14 A/D and turns It changes, so it has the advantages that precision is high, low-cost.External Acquisition Circuit figure is as shown in Figure 8.

Serial EEPROM memory FM93C66 is the serial EEPROM memory part of a 4Kbit, using Low-Power CMOS Technological design, operating voltage range：8 or 16 bit architectures may be selected in 1.8V~6.0V, memory, when there is new data write-in When, it may be implemented to remove memory content automatically, while there is hardware and software write-protect, also have and power on accidentally write-protect, 1000000 program/erase periods, data preservation service life are 100 years.The specific connection circuit diagram of S3C6410 and FM93C66 is such as Shown in Fig. 9：

The liquid display module of the application is using one 7.0 inches, the TFT TFT True Color LCDs that resolution ratio is 800*480. LCD display interface circuit figures are as shown in Figure 10.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims

1. a kind of multichannel recording instrument without paper, which is characterized in that it is using microcontroller as core, and numerical value carries out outside the microcontroller Circling measurment, data calculate, data show while detecting communication data and make corresponding processing, and SCM peripheral has periphery Modulate circuit, power module, data memory module, outside A/D acquisition modules, data communication module and display module, the electricity Source module, data memory module, outside A/D acquisition modules, data communication module and display module connect with the microcontroller respectively It connects, the periphery modulate circuit is connect by analog switch with the external A/D acquisition modules and the microcontroller, the periphery Modulate circuit includes temperature signal regulation circuit, pressure signal conditioning circuit and frequency signal modulate circuit, the temperature signal Modulate circuit uses thermal resistance PT100 collecting temperature signals, the upper end of the thermal resistance PT100 to connect two conducting wires, lower end Other two conducting wires are connected, the frequency signal modulate circuit includes being examined by GaAs infrared light-emitting diode and phototransistor The photoelectrical coupler that device optical coupling is constituted is surveyed, the external A/D acquisition modules are converted using ICL7135 chips as external A/D Device.

2. a kind of multichannel recording instrument without paper according to claim 1, it is characterised in that：The microcontroller is selected S3C6410 chips.

3. a kind of multichannel recording instrument without paper according to claim 1, it is characterised in that：The display module uses 7.0 Inch, the TFT TFT True Color LCDs that resolution ratio is 800*480.