CN207037418U - A kind of multi signal collecting terminal - Google Patents

Abstract

The application is on a kind of multi signal collecting terminal, including circuit unit and for placing the housing of circuit unit, circuit unit includes acquisition module, core processing module, transport module, debugging module and power module, acquisition module, core processing module and transport module are sequentially connected electrically, debugging module electrically connects with core processing module, and the output end of power module is connected with the power input of acquisition module, core processing module, debugging module and transport module and is its power supply respectively；The acquisition module interface of connection acquisition module, the transport module interface of connection transport module and the power port for connecting power module are provided with housing.The application carries out intelligent acquisition by gathering, transmitting the structure of integration to the various signals of measurand, hardware circuit can effectively be simplified, reduce fault rate, be advantageous to improve the reliability of acquisition terminal, acquisition module antijamming capability is high, is advantageous to improve the measurement accuracy of acquisition terminal.

Description

A kind of multi signal collecting terminal

Technical field

The application is related to measurement and controller unit technical field, more particularly to a kind of multi signal collecting terminal.

Background technology

Signal acquisition be Internet of Things basis, in particular to signal collecting device from the simulation of sensor or equipment under test and Automatic data collection signal in digital unit under test, and transmit a signal to the process of host computer.With intelligentized development and now The complication of field measurand, in order to be analyzed measurand comprehensively, it usually needs while multiple signals are gathered, this is just needed Want a kind of terminal device that can gather multi-signal simultaneously.

In existing multi signal collector, circuit unit is generally made up of multiple hardware circuits, especially gather it is multiple not During congener signal, need have corresponding hardware circuit for different types of Design of Signal in multi signal collector, also It is to say, more hardware circuits and component is needed in circuit unit, the collection and measurement of multi-signal could be realized.

However, in existing multi signal collector, due in circuit unit only with hardware circuit, when gathering a variety of differences During signal, hardware circuit is more complicated, component is more, and noise greatly increases as caused by hardware circuit, so as to cause to believe more Number collector easily breaks down, and reliability is not high enough.Simultaneously as interference signal caused by more hardware circuit is more, These interference signals make it that the measurement accuracy of multi signal collector is also not high enough.

The content of the invention

To overcome the problem of existing collector reliability is not high enough and measurement accuracy is not high enough, the application provides a kind of more Signal intelligent acquisition terminal.

The technical scheme that the application solves the technical problem is：A kind of multi signal collecting terminal, including：

Circuit unit, the circuit unit include acquisition module, core processing module, transport module, debugging module and electricity Source module, the acquisition module, core processing module and transport module are sequentially connected electrically, the debugging module and core processing mould Block is electrically connected, and the input of the power module is connected with external power source, and the output end of the power module is adopted with described respectively Collection module, core processing module, the power input of debugging module and transport module connects and are that it is powered；

For placing the housing of the circuit unit, the acquisition module for connecting the acquisition module is provided with the housing The power port of interface, the transport module interface of the connection transport module and the connection power module；

The acquisition module interface (7) includes switching signal port (71), 4-20mA signal ports (72) and RS485 difference Signal port (73).

Alternatively, the acquisition module includes voltage comparator, the AD8273 fortune being made up of integrated operational amplifier LM358 Calculate amplifier and SP485EEN RS485 transceivers, the voltage comparator, AD8273 operational amplifiers and SP485EEN RS485 transceivers are connected in parallel.

Alternatively, the core processing module is STM32F103VCT6 single-chip microcomputers.

Alternatively, the transport module includes wired transport module and wireless transport module.

Alternatively, the wire transmission module is ethernet module, and the wireless transport module includes GPRS wireless modules With 433 wireless modules, the Ethernet being connected respectively with the ethernet module and 433 wireless modules is provided with the housing and is passed Defeated interface and 433 antenna interfaces.

Alternatively, the power module is an electric pressure converter or voltage conversion circuit, and output voltage is 5V and 3.3V two Kind.

Alternatively, the acquisition module interface is provided with transient state inhibition element, the transient state inhibition element and institute State acquisition module parallel connection.

Alternatively, the transient state inhibition element is gas-discharge tube GDT or Transient Suppression Diode TVS.

Alternatively, input module and display module, the input module and institute are additionally provided with the outer surface of the housing Acquisition module electrical connection is stated, the display module is electrically connected with the power module, transport module and signal acquisition module respectively Connect.

Alternatively, the input module is one group of button, and the display module is liquid crystal display display screen and LED light.

The technical scheme that embodiments herein provides can include the following benefits：

Acquisition module, core processing module, transport module and debugging module are provided with the application circuit unit, with collection The acquisition module interface of module connection includes switching signal port, 4-20mA signal ports and RS485 differential signals port so that Multi signal collecting terminal can gather switching signal, 4-20mA signals or RS485 differential signals, and by opening after collection OFF signal, 4-20mA signals or RS485 differential signals are transferred to core processing module, then through transport module by switching signal, 4-20mA signals or RS485 differential signal transmissions to host computer or mobile terminal, debugging module are connected with core processing module, The function of being attached multi signal collecting terminal and external emulator can be realized.The application is simple in construction, is realizing Hardware circuit is simplified on the basis of more Signals collecting functions, advantageously reduces the rate of breakdown of multi signal acquisition terminal, Improve the reliability of multi signal acquisition terminal.Meanwhile integrated operational amplifier LM358 groups are respectively adopted in acquisition module in the application Into voltage comparator, AD8273 operational amplifiers and SP485EEN RS485 transceivers to switching signal, 4-20mA signals and RS485 differential signals are acquired, and can reduce the burr and noise of switching signal, and eliminate drift, change in gain, signal Interference, be advantageous to improve the measurement accuracy of multi signal acquisition terminal.

Transport module includes wireless module and ethernet module in the application, disclosure satisfy that the demand of different operating scene, And 433 wireless module penetration power it is strong, long distance for data.In addition, the main part circuit unit of the application mainly includes five Individual module, intelligent acquisition, the transmission integration of multi signal can be realized by five modules, whole device is simple in construction, operation Expense is low, and selected device is technical grade product in the application, function admirable, can in the range of -40 DEG C -80 DEG C normal work Make, strong environmental adaptability, use easy to spread.

It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not The application can be limited.

Brief description of the drawings

Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the application Example, and be used to together with specification to explain the principle of the application.

, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art Speech, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of multi signal collecting terminal structural representation that the embodiment of the present application provides；

Fig. 2 is the circuit theory diagrams for the multi signal collecting terminal that the embodiment of the present application provides；

Fig. 3 is the circuit theory diagrams for the acquisition module that the embodiment of the present application provides；

Fig. 4 is the circuit theory diagrams for the core processing module that the embodiment of the present application provides；

Fig. 5 is the circuit theory diagrams for the transport module that the embodiment of the present application provides.

Symbol represents：

1- acquisition modules, 2- core processing modules, 3- transport modules, 4- debugging modules, 5- power modules, 6- housings, 7- Acquisition module interface, 71- switching signals port, 72-4-20mA signal ports, 73-RS485 differential signals port, 8- transmission moulds Block interface, 9- power ports.

Embodiment

For the technical characterstic for illustrating this programme can be understood, below by embodiment, and its accompanying drawing is combined, to this Shen It please be described in detail.Following disclosure provides many different embodiments or example is used for realizing the different knots of the application Structure.In order to simplify disclosure herein, hereinafter the part and setting of specific examples are described.In addition, the application can be with Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated Relation between various embodiments are discussed and/or set.It should be noted that part illustrated in the accompanying drawings is not necessarily to scale Draw.The application eliminates the description to known assemblies and treatment technology and process to avoid being unnecessarily limiting the application.

In agricultural technology field, it is often necessary to reflecting that the various information of farm environment are acquired in farm, such as：Drop Rainfall, P in soil H values, soil temperature and humidity etc..Related personnel adjusts farm environment according to these information, so as to be carried for crops For more suitable growing environment.In order to more fully understand the application, the implementation of the application is explained in detail below in conjunction with the accompanying drawings Mode.

Referring to Fig. 1, Fig. 1 is a kind of multi signal collecting terminal structural representation that the embodiment of the present application provides.By Fig. 1 Understand, the application mainly includes circuit unit and 6 two parts of housing for placing circuit unit.Wherein, circuit unit is again Including 5 five acquisition module 1, core processing module 2, transport module 3, debugging module 4 and power module parts.Acquisition module 1, Core processing module 2 and transport module 3 are sequentially connected electrically, and debugging module 4 electrically connects with core processing module 5, power module 5 Input connects external power source, and the output end of power module 5 connects acquisition module 1, core processing module 2, debugging module 4 respectively And the power input of transport module 3, power module 5 be used for for acquisition module 1, core processing module 2, debugging module 4 with And transport module 3 is powered.Housing 6 is used for protection circuit unit, and pair of disparate modules in circuit unit is provided with housing 6 External tapping, specifically, the acquisition module interface 7 of connection acquisition module 1 is provided with housing 6, connects the transmission mould of transport module Block interface 8 and the voltage port 9 for connecting power module 5.The circuit of multi signal collecting terminal is former in the embodiment of the present application Reason figure may refer to Fig. 2.

With continued reference to Fig. 1, acquisition module 1 is used to gather switching signal, 4-20mA signals or RS485 differential signals, real Also may be used in use, the signal of required collection and the quantity of signal can determine according to measurand and different demands on border With only collecting part signal, the signal for being not required to collection does not access multi signal collecting terminal.Such as：Gather in orchard During multi-signal, acquisition module 1 can be arranged to a path switching signal, two-way 4-20mA signals, and three road RS485 difference Signal.Wherein, switching signal is mainly digital quantity signal, such as：Rainfall signal in orchard；4-20mA signals are analog quantity Signal, such as：Photosynthetically active radiation signal or soil acidity or alkalinity signal in orchard；RS485 differential signals are a pair of size phases Two signal wires of the opposite symmetric signal of isopolarity and use transmit a differential signals, such as：Aerial temperature and humidity in orchard Signal, wind direction and wind velocity signal, soil temperature and humidity signal or soil conductivity signal.These three signals cover common substantially Various signals.As shown in Figure 1, the switch letter in switching signal, 4-20mA signals and RS485 differential signals difference corresponding housing 6 Number port 71,4-20mA signal ports 72 and RS485 differential signals port 73.

Specifically, acquisition module 1 can include three parts in the application：The electricity being made up of integrated operational amplifier LM358 Press comparator, AD8273 operational amplifiers and SP485EEN RS485 transceivers, and voltage comparator, AD8273 operational amplifiers It is connected in parallel with SP485EEN RS485 transceivers.Fig. 3 shows the circuit theory for the acquisition module that the embodiment of the present application provides Figure.

Integrated operational amplifier LM358 is high-gain Width funtion double operational, the electricity being made up of integrated operational amplifier LM358 Pressure comparator can realize the collection to switching signal, and can remove the shake in switching signal, effectively reduce switch letter Number burr and noise.

AD8273 operational amplifiers are rail-to-rail zero shift industrial instrument operational amplifier, have micro energy lose, zero shift, rail The characteristics of inputting and export to rail, exemplified by gathering two-way 4-20mA signals, AD8273 can pass through the electricity of two relative matchings Resistance sets any gain between 1-1000, and two resistance of equal ratios available matching reach preferable increasing under any gain Strengthening the essence degree, so as to realize the collection to two-way 4-20mA signals.Therefore, can effectively be carried using AD8273 operational amplifiers The measurement accuracy of high multi signal collecting terminal.

SP485EEN RS485 transceivers belong to the industrial transceiver of stage enhancement type low-power consumption half-duplex RS 485, and the application is real Apply in example and RS485 signals are converted into by transistor-transistor logic integrated signal TTL signal, SP485EEN using SP485EEN RS485 transceivers and SP485 series are completely compatible, and SP458EEN RS485 transceivers have stronger electrostatic discharge (ESD) protection Performance so that acquisition module can keep proper communication in static discharge, transient state convert more sensitive environment, so as to carry The job stability and antijamming capability of high acquisition module 1.In addition, SP485EEN RS485 transceiver energy in the embodiment of the present application The transmitting-receiving to 3 road RS485 signals is enough realized, the sensor of the multiple identical categories in measurand scene can be parallel to all the way On RS485 signal wires, current SP485EEN RS485 transceivers are maximum to be supported in 32 biographies in parallel on RS485 signal wires all the way Sensor, the multi signal for being tested scene is gathered so as to realize.

, can be in acquisition module interface further to improve the reliability and measurement accuracy of multi signal collecting terminal Transient state inhibition element is set at 7, and transient state inhibition element is in parallel with acquisition module 1.I.e.：Switching signal port 71,4- Transient state inhibition element is respectively provided with 20mA signal ports 72 and RS485 differential signals port 73, is arranged at switching signal port Transient state inhibition element at 71 is in parallel with the voltage comparator that switching signal is gathered in acquisition module, is arranged at 4-20mA signals Transient state inhibition element at port 72 is in parallel with the AD8273 operational amplifiers that 4-20mA signals are gathered in acquisition module, sets Transient state inhibition element at RS485 differential signals port 73 is with gathering RS485 differential signals in acquisition module SP485EEN RS485 transceivers are in parallel.

The setting of transient state inhibition element, can contain outside surge, prevent high current from causing to damage to internal circuit, have Beneficial to the reliability for improving multi signal collecting terminal.Specifically, transient state inhibition element can use GDT (Gas Discharge Tube, gas-discharge tube) or TVS (Transient Voltage Suppressor, two poles of transient state suppression Pipe).In thunderstorm weather, GDT or TVS can prevent damage of the high current to acquisition module, play a part of protecting acquisition module, So that it is guaranteed that multi signal collecting terminal is in thunderstorm weather normal work, therefore, at acquisition module interface 7 using GDT or TVS, be advantageous to improve the reliability of multi signal collecting terminal.

Core processing module 2 is used to measure switching signal, 4-20mA signals or RS485 differential signals, store And computing.Core processing module 2 can use a STM32F103VCT6 single-chip microcomputers, core processing module 2 in the embodiment of the present application Circuit theory diagrams referring to Fig. 4.The clock frequency of STM32F103VCT6 single-chip microcomputers reaches 72M, and the single-chip microcomputer peripheral hardware enriches, Preferable hardware supported can be provided for data processing, be advantageous to improve the reliability of multi signal data collection station.

Specifically, monolithic can be used with reference to acquisition module in above-described embodiment 1, the rear class of voltage comparator STM32F103VCT6 external interrupt EXIT enters the collection of horizontal pulse, and this structure design is it is advantageously ensured that the standard of pulse collection True property, so as to improve the measurement accuracy of multi signal collecting terminal.Further to improve the accuracy of acquisition time, The accurate timing that SYSTICK can be used to carry out inside STM32F103VCT6 single-chip microcomputers 1 second.

Continuing with acquisition module in above-described embodiment 1, using the A/D converter of 12 precision as monolithic A STM32F103VCT6 peripheral hardware, and rear class of the peripheral hardware as AD8273 operational amplifiers, this structure design can be entered One step improves the precision of AD8273 operational amplifiers.

Continuing with acquisition module in above-described embodiment 1, the rear class of SP485EEN RS485 transceivers passes through single-chip microcomputer STM32F103VCT6 hardware UART interface carries out data transmission, and is advantageous to improve the precision of RS485 signals transmission.To enter one Step ensures data accuracy of the RS485 signals in transmission and transfer process, can be set in single-chip microcomputer STM32F103VCT6 CRC16 carries out data check.

From Fig. 1 and Fig. 4, debugging module 4 electrically connects with core processing module 2.Debugging module 4 is used to carry out EEPROM Reset, crystal oscillator reset, burning program and in-circuit emulation.Company of the debugging module 4 as core processing module 2 and external emulator Device is connect, external emulator can be facilitated by being debugged to program to realize in-circuit emulation, so that proving program is accurate Property.

With continued reference to Fig. 1, as shown in Figure 1, transport module 3 electrically connects with core processing module 2, and transport module 3 is used to connect Control signal is received, and by switching signal, 4-20mA signals or RS485 differential signal transmissions to host computer or mobile terminal. The transport module 3 of multi signal collecting terminal includes wired transport module and wireless transport module, nothing in the embodiment of the present application Wire module includes GPRS wireless modules and 433 wireless modules again.

Specifically, wire transmission module is mainly used in the situation for having cable network in the site environment of measurand, this Shen Wire transmission module please can use ethernet module, i.e. ethernet nic in embodiment, with ethernet module accordingly, shell The Ethernet coffret being connected with ethernet module is provided with body 6.It can also be set on housing 6 in the embodiment of the present application 485 interfaces, Ethernet coffret and 485 interfaces correspond to different hardware supporteds respectively, and both can not use simultaneously, it is optional its One uses, and this part is any technique commonly known, is repeated no more again.Wireless transport module is mainly used in showing for measurand There is no cable network situation in environment, wireless transport module can use GPRS wireless modules or 433 in the embodiment of the present application Wireless module, accordingly, 433 antenna interfaces being connected with 433 wireless modules are provided with housing 6.Do not have in site environment During cable network, signal can be sent directly to host computer or mobile terminal by GPRS wireless modules, or, signal is logical first The antenna for crossing 433 wireless modules is sent into the nearest cable network of distance field environment, then final by cable network again Transmit to host computer or mobile terminal.

Ethernet module in the embodiment of the present application is high performance embedded networking single-chip, simple in construction, practicality By force.GPRS module in the embodiment of the present application is conventional GPRS module, and 433 wireless modules belong to the radio-frequency receiving-transmitting one of master-slave mode Chip, 433 wireless modules can realize superpower wireless transmission capability by setting external antenna, so as to be efficiently received control Signal processed and by switching signal, 4-20mA signals or RS485 differential signal transmissions to host computer or mobile terminal.The application By wired and wireless a variety of transmission means in embodiment, multi signal collecting terminal can be made in different network conditions Under, it is ensured that effective, the quick upload of data.The circuit theory diagrams of transport module 3 may refer to Fig. 5 in the embodiment of the present application.

Such as：If being provided with the network equipments such as video camera on multi signal collecting terminal, because video camera needs to adopt Carried out data transmission with netting twine, therefore such case belongs in site environment the situation for having cable network, now, can be by multi signal Collecting terminal is connected by small switch with network equipment video camera, so as to carry out signal transmission by netting twine, moreover, Such case can avoid individually setting up netting twine or increase receiver, advantageously reduce cost.If multi signal intelligent acquisition Terminal need not install the network equipments such as video camera, then multi signal collecting terminal can carry out letter by wireless transport module Number transmission.Directly carry out signal transmission using GPRS module or access again by 433 wireless modules to carry out letter in cable network Number transmission.The process for accessing progress signal transmission in cable network again by 433 wireless modules is as follows：First, by scene Nearest wire network devices download receiver program in environment, become a wireless receiver, then, 433 wireless moulds Block is transmitted a signal in the wireless receiver, finally, is transmitted a signal to by the ethernet module of wireless receiver upper In machine or mobile terminal.

With continued reference to Fig. 1, as shown in Figure 1, the multi signal collecting terminal in the embodiment of the present application also includes power supply mould Block 5, the input of power module 5 are connected by power port 9 with outside 12V power supplys, and the output end of power module 5 is respectively with adopting Collection module 1, core processing module 2, the power input of debugging module 4 and transport module 3 connects and are that it is powered.The application Power module 5 can use an electric pressure converter or a voltage conversion circuit, electric pressure converter or voltage conversion in embodiment Circuit input voltage is 12V, and output voltage is 5V and two kinds of 3.3V.The power module is using voltage conversion of the prior art electricity Road, such as：The power module includes power supply adaptor, bridge rectifier, capacitive filter and the voltage-stablizer being sequentially connected.

Each component voltage supply situation is as follows in multi signal collecting terminal in the embodiment of the present application：Multi signal intelligence 12V voltages are inputted in acquisition terminal, the 12V voltages can be the AD8273 operational amplifiers power supply of collection 4-20mA signals.Together When, the 12V voltages are connected on the voltage stabilizing chip LM2596SX-5.0 in voltage conversion circuit, and voltage stabilizing chip LM2596SX-5.0 is defeated Go out stable 5V DC voltages, 5V DC voltages are supplied to SP485EEN RS485 by the voltage conversion circuit as power module Transceiver, Ethernet transport module and GPRS wireless modules.5V DC voltages are connected to the high efficiency line in voltage conversion circuit Property voltage-stablizer AMS1117-3.3V on, the stable 3.3V DC voltages of high-efficient linear voltage-stablizer AMS1117-3.3V outputs should 3.3V DC voltages are STM32F103VCT6 single-chip microcomputers, debugging module 4, the voltage comparator and 433 nothings for gathering switching signal Wire module is powered.

In the embodiment of the present application, input module and display module are additionally provided with the outer surface of housing 6, wherein, input mould Block electrically connects with acquisition module 1, and display module electrically connects with power module 5, transport module 4 and acquisition module 1 respectively.Input Module can be one group of button, and display module can be a liquid crystal display display screen and LED light.Button, LCDs and LED light can select one of which, two or three.Button is as input module, by the way that button and acquisition module 1 is electric Connection, can realize the configuration to multi signal collecting terminal parameter.LCDs passes through liquid crystal as display module Display screen electrically connects with transport module 4 and acquisition module 1 respectively, can realize and related data is intuitively shown, therefore, button With the setting of LCDs, the flexibility of multi signal collecting terminal can be greatly improved.LED light is as display mould Block, by the way that LED light is electrically connected with power module 5, transport module 4 and acquisition module 1 respectively, can intuitively it show The on off state of power supply, the reiving/transmitting state of wireless transport module, the working condition of Ethernet transport module and RS485 signals Reiving/transmitting state, it is convenient to check that the working condition of current device provides for user, is advantageous to the debugging of multi signal collecting terminal With maintenance.

Now by taking the multi signal collecting terminal in applied to orchard as an example, once multi signal collecting terminal is described The course of work：Modernized at one in orchard, it is necessary to aerial temperature and humidity, photosynthetically active radiation degree in remote collection orchard, drop The information such as rainfall, wind direction and wind velocity, soil temperature and humidity, specific soil conductivity and soil acidity or alkalinity, and by these information with signal Mode real-time Transmission, using the multi signal collecting terminal in the application, can gather information above simultaneously to server end. First, the sensor that rainfall test is carried out in scene transmits rainfall signal the switching signal of at most signal intelligent acquisition terminal Port, meanwhile, the sensor for carrying out photosynthetically active radiation test in scene and carrying out soil acidity or alkalinity test has photosynthetic respectively Effect radiation signal and soil acidity or alkalinity signal are transmitted to 4-20mA signal ports, and aerial temperature and humidity test, wind direction are carried out in live The sensor of wind speed test, soil temperature and humidity test and soil conductivity test is respectively by aerial temperature and humidity signal, wind direction wind Fast signal, soil temperature and humidity signal and soil conductivity signal are transmitted to RS485 differential signals port.Then, multi signal intelligence The core processing module of acquisition terminal measured respectively to these different signals, is stored and computing, finally, passes through biography Defeated module transmits these different signals to server or mobile terminal, so that staff is checked and analyzed to it.

The optional embodiment of simply the application described above, for those skilled in the art, On the premise of not departing from the application principle, some improvements and modifications can also be made, these improvements and modifications are also regarded as this Shen Protection domain please.

Claims (10)

1. a kind of multi signal collecting terminal, it is characterized in that, including：

Circuit unit, the circuit unit include acquisition module (1), core processing module (2), transport module (3), debugging module (4) and power module (5), the acquisition module (1), core processing module (2) and transport module (3) are sequentially connected electrically, described Debugging module (4) is electrically connected with core processing module (2), and the input of the power module (5) is connected with external power source, described The output end of power module (5) respectively with the acquisition module (1), core processing module (2), debugging module (4) and transmission The power input connection of module (3)；

For placing the housing (6) of the circuit unit, it is provided with the housing (6) and connects adopting for acquisition module (1) Collect the electricity of module interface (7), the transport module interface (8) of the connection transport module (3) and the connection power module (5) Source port (9)；

The acquisition module interface (7) includes switching signal port (71), 4-20mA signal ports (72) and RS485 differential signals Port (73).

2. a kind of multi signal collecting terminal as claimed in claim 1, it is characterized in that, the acquisition module (1) include by Voltage comparator, AD8273 operational amplifiers and the SP485EEN RS485 transceivers of integrated operational amplifier LM358 compositions, institute Voltage comparator, AD8273 operational amplifiers and SP485EEN RS485 transceivers is stated to be connected in parallel.

3. a kind of multi signal collecting terminal as claimed in claim 1, it is characterized in that, the core processing module (2) is STM32F103VCT6 single-chip microcomputers.

4. a kind of multi signal collecting terminal as claimed in claim 1, it is characterized in that, the transport module (3) includes Line transport module and wireless transport module.

5. a kind of multi signal collecting terminal as claimed in claim 4, it is characterized in that, the wire transmission module is ether Net module, the wireless transport module include GPRS wireless modules and 433 wireless modules, difference are provided with the housing (6) The Ethernet coffret and 433 antenna interfaces being connected with the ethernet module and 433 wireless modules.

6. a kind of multi signal collecting terminal as claimed in claim 1, it is characterized in that, the power module (5) is an electricity Pressure converter or voltage conversion circuit, output voltage are 5V and two kinds of 3.3V.

7. a kind of multi signal collecting terminal as described in any one in claim 1-6, it is characterized in that, the collection mould Block interface (7) place is provided with transient state inhibition element, and the transient state inhibition element is in parallel with the acquisition module (1).

8. a kind of multi signal collecting terminal as described in claim 7, it is characterized in that, the transient state inhibition element is Gas-discharge tube GDT or Transient Suppression Diode TVS.

9. a kind of multi signal collecting terminal as described in any one in claim 1-6, it is characterized in that, the housing (6) input module and display module are additionally provided with outer surface, the input module electrically connects with the acquisition module, described Display module electrically connects with the power module, transport module and signal acquisition module respectively.

10. a kind of multi signal collecting terminal as claimed in claim 9, it is characterized in that, the input module is one group and pressed Key, the display module are liquid crystal display display screen and LED light.