CN103869196A - Electricity quantity recording analyzer - Google Patents
Electricity quantity recording analyzer Download PDFInfo
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- CN103869196A CN103869196A CN201410125460.7A CN201410125460A CN103869196A CN 103869196 A CN103869196 A CN 103869196A CN 201410125460 A CN201410125460 A CN 201410125460A CN 103869196 A CN103869196 A CN 103869196A
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Abstract
The invention provides an electricity quantity recording analyzer which comprises a front-arranged collector and a main machine of an upper control analyzing machine. The front-arranged collector and the main machine of the upper control analyzing machine are arranged in a full-aluminum-magnesium alloy machine case. A liquid crystal displayer of the upper control analyzing machine and the machine case are of an outer-turning structure, and the liquid crystal displayer is arranged outside the machine case. The liquid crystal displayer is connected with the side ridge of a top cover of the machine case through a rotating shaft. The liquid crystal displayer is connected with the main machine through a data line in the rotating shaft. The outer surface of the top cover of the machine case is provided with a keyboard and a mouse touch panel which are connected with the main machine. The concave-in depth of a display screen of the liquid crystal displayer is larger than the height of the keyboard. The back side wall of the machine case is provided with a signal collecting interface corresponding to the front-arranged collector. The side wall of the machine case is provided with power supply interfaces of the front-arranged collector and the main machine and an outer-connecting interface corresponding to the main machine. The problem that a separate-structure electricity quantity (wave form) recording analyzer is poor in communication stability, and using is not convenient is solved, and equipment performance is improved.
Description
Technical field
The present invention relates to circuit field, in particular to electric weight recorder analyser.
Background technology
Electric weight (waveform) recorder analyser is a kind of Comprehensive Signal Processing collection analysis instrument, it by tested electric signals isolate, signal conversion, through A/D convert digital signal to, digital signal after changing according to certain sampling interval storage, and the digital signal of storage is shown on screen in the mode of graph curve, finally the graph curve data that show are carried out to various analyzing and processing.
The structural representation of electric weight (waveform) recorder analyser as shown in Figure 1, this electric weight (waveform) recorder analyser comprises: signal conversion module, signal amplification module, multiway analog switch, A/D transducer, internal memory RAM, built-in industrial control machine and logic control device, Ethernet interface, upper notebook computer etc.Specific works mode is as follows:
(1) access of external signal: each passage has 1 pair of input terminal, external signal is introduced directly into the signal conversion module (the signal transformation relation of each passage immobilizes separately) of each passage through input terminal;
(2) signal carries out (isolation) conversion: signal conversion module to signal isolate, the processing such as dividing potential drop, unsteady flow, input signal is transformed into the treatable small-signal of general mimic channel (generally below 10V).
(3) signal amplifies: signal is transformed into demarcation is unified, A/D transducer acceptable standard signal by signal amplification module.
(4) signal multichannel is switched: give A/D transducer through multiway analog switch by controlling after requirement is switched successively through amplifying each standard signal after treatment.
(5) analog to digital conversion: convert the simulating signal of sending into A/D transducer to digital signal.
(6) data are temporary: the digital signal obtaining after analog to digital conversion is sent into internal memory RAM, and temporarily preserve.
(7) forwarding of data: by after the digital signal built-in industrial control machine in internal memory and logic control device, then give upper notebook computer on Ethernet interface.
(8) through engineering approaches of data and demonstration: upper notebook computer converts the data of receiving to the quantities that can truly reflect external signal by certain transformational relation, and be presented on screen in the mode of squiggle or numerical value simultaneously.
(9) analyzing and processing of data.
(10) preservation of data.
In above-mentioned electric weight (waveform) recorder analyser, signal conversion module, signal amplification module, multiway analog switch, A/D transducer, internal memory RAM, built-in industrial control machine and logic control device can be referred to as front-collection device, and upper notebook computer also can be called upper control analytical engine, as shown in Figure 1, the front-collection device of this recorder analyser and upper control analytical engine are separate type, between front-collection device and upper control analytical engine, need to adopt ethernet line or USB line to be connected, can not get ensureing in the reliability of industry spot like this, cause communicating interrupt such as interface is loosening, on-the-spot electrical Interference causes too greatly communication to make mistakes, the incompatible problems such as communication abnormality that cause of interface driver.Need the operating mode (as the work such as electric energy quality monitoring, the aptitude tests of wind energy turbine set power adjustments all need several days time) of non-volatile recording data for some, the continuous firing stability of general commercial computer cannot guarantee, measurement to signal brings uncertainty, and movably civilian notebook computer is placed on unserviced industry spot for a long time, is also great test to the security of equipment.
The communication robust existing for electric weight (waveform) recorder analyser of above-mentioned separate type is poor, and inconvenient problem with use, not yet proposes effective solution at present.
Summary of the invention
The object of the present invention is to provide a kind of electric weight recorder analyser, to solve the above problems.
Electric weight recorder analyser is provided in an embodiment of the present invention, front-collection device and upper control analytical engine are structure as a whole, wherein, the main frame of front-collection device and upper control analytical engine is arranged in full almag cabinet, the liquid crystal display of upper control analytical engine and cabinet are eversion type structure and are arranged on outside cabinet, this liquid crystal display is connected with the incline of the top cover of cabinet by rotating shaft, and this liquid crystal display is connected with main frame by the data line in rotating shaft; The outside surface of the top cover of cabinet is provided with the keyboard and the mouse touch pad that are connected with main frame, and the degree of depth of the display screen indent of liquid crystal display is greater than the height of keyboard; The rear wall of above-mentioned cabinet is provided with the signals collecting interface that front-collection device is corresponding, is provided with the power supply interface of front-collection device and main frame on the sidewall of cabinet, and respective hosts outreach interface.
The electric weight recorder analyser that the embodiment of the present invention provides adopts front-collection device and the integrated design of upper control analytical engine, adopt full almag cabinet simultaneously, display adopts cover up turning type, and in cabinet, be provided with main frame and the front-collection device of upper control analytical engine, thereby by signal processing and collecting part and figure demonstration, data processing and storage area are organically integrated as a whole, external netting twine or the USB line that may cause loose contact are cancelled, solved separate type electric weight (waveform) recorder analyser exist communication robust poor, inconvenient problem with use, promote the performance of equipment.
Accompanying drawing explanation
Fig. 1 shows the structural representation of electric weight (waveform) recorder analyser in correlation technique;
Fig. 2 shows the front view of the electric weight recorder analyser that the embodiment of the present invention provides;
Fig. 3 a shows the structural representation of the electric weight recorder analyser that the embodiment of the present invention provides;
Fig. 3 b shows the structural representation of the gear control loop that the embodiment of the present invention provides;
The gear control loop repeat circuit group that Fig. 4 shows the embodiment of the present invention to be provided drives the circuit theory diagrams of some divider resistances;
Fig. 5 shows the structural representation of the electric weight recorder analyser that the embodiment of the present invention provides;
Fig. 6 shows the structural representation of the electric weight recorder analyser that the embodiment of the present invention provides;
Fig. 7 shows the structural representation in the overvoltage protection loop that the embodiment of the present invention provides.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
The front view of electric weight recorder analyser (also can be called electric weight (waveform) recorder analyser) as shown in Figure 2, front-collection device and upper control analytical engine are structure as a whole, wherein, the main frame of front-collection device and upper control analytical engine is arranged in full almag cabinet 10, it (is cover up turning type that liquid crystal display 12 and the cabinet 10 of upper control analytical engine are eversion type structure, be similar to the display screen of notebook) be arranged on outside cabinet, liquid crystal display 12 is connected with the incline of the top cover 16 of cabinet 10 by rotating shaft 14, liquid crystal display 12 is connected with above-mentioned main frame by the data line in rotating shaft 14,
The outside surface of the top cover 16 of cabinet 10 is for example provided with the keyboard 18 that is connected with main frame and mouse touch pad 19(: Touchpad touch pad), the degree of depth of display screen 13 indents of liquid crystal display 12 is greater than the height of keyboard 18;
The rear wall of cabinet 10 is provided with the signals collecting interface that front-collection device is corresponding, is provided with the power supply interface of front-collection device and main frame on the sidewall of cabinet 10, and respective hosts outreach interface.Wherein signals collecting interface can configure according to actual needs with the concrete quantity that outreaches interface, for example: outreaching interface can comprise: 2 self-adaptation Ethernet interfaces (as, be applicable to the interface of 10/100/1000Mbps), 5 USB interface, 1 RS485 interface and 1 differential type B code to time interface etc.
The electric weight recorder analyser of the present embodiment adopts front-collection device and the integrated design of upper control analytical engine, adopt full almag cabinet simultaneously, display adopts cover up turning type, and in cabinet, be provided with main frame and the front-collection device of upper control analytical engine, thereby by signal processing and collecting part and figure demonstration, data processing and storage area are organically integrated as a whole, external netting twine or the USB line that may cause loose contact are cancelled, solved separate type electric weight (waveform) recorder analyser exist communication robust poor, inconvenient problem with use, promote the performance of equipment.
Wherein, the main frame of the present embodiment can be to configure higher main frame, for example configure high-performance CPU, large capacity solid state disk etc., based on this, above-mentioned main frame can comprise: such as Intel Core2Duo2.4GHz of the double-core CPU(of 2.4GB), 4GB internal memory (for example: 4GBDDR2800MHz), 256GB hard disk (for example: the technical grade solid state hard disc of SATA) etc.The environment of considering outdoor study is poor, and above-mentioned keyboard can be waterproff keyboard (for example: 88 key silica gel waterproff keyboards).
In addition, liquid crystal display can also adopt the almag shell that 3mm is thick, and the large liquid crystal display of high resolving power, low temperature resistant, high brightness, its index: being of a size of 15.4 inches, resolution is that 1280*800, brightness are 700 lumens, visual under high light; Normal range of operation is at-30 ℃～+ 50 ℃, low temperature resistant and wide temperature range type.
Certainly, above-mentioned cabinet is also provided with ventilating opening, cabinet bottom can also arrange heelpiece, to reduce the wear intensity etc. of cabinet.
The instrument of this structure both can use separately, also can be used in conjunction with by the computer in Ethernet and a distant place, and can many instrument parallel connections use, and in parallel use guarantees each instrument synchronous acquisition.Instrument provides multiple kinds, so that in the time carrying out the aptitude tests of wind energy turbine set power tracking, can easily and obtain meritorious, idle distant value of establishing that scheduling sends with the control system interface of wind energy turbine set.
Based on above-mentioned electric weight recorder analyser, the present embodiment also improves its front-collection device, the structural representation of electric weight recorder analyser as shown in Figure 3 a, on its every passage, be provided with gear control loop 22, it is provided with pair of input terminals 221, and the external signal that this input terminal receives transfers to signal transformation loop 24 through gear control loop; The structural representation of gear control loop as shown in Figure 3 b, each gear control loop 22 includes: connected programmable logic controller (PLC) 22a, triode array 22b, relay group 22c and some divider resistances successively, for the gear control signal issuing according to upper control analytical engine 20, by extremely corresponding gear of the gear switch on the passage of place.Wherein, programmable logic controller (PLC) 22a can adopt GAL16V8, and triode array 22b can adopt MC1413, and the relay in relay group 22c can adopt DSP2A.Wherein, above-mentioned some divider resistances are not signal in Fig. 3, and R1, the R1A, R2, R2A, R3, the R3A that in Fig. 4, illustrate are these divider resistances.
The present embodiment, take three relays as example, is respectively J1:DSP2A, J2:DSP2A and J3:DSP2A in Fig. 3 b; CHn_H in figure and CHn_L are a high position and the low levels of two gear control inputs control words of passage n, work as CHn_H=0, and when CHn_L=0, for the most high-grade, CHn_J1, CHn_J2, CHn_J3 output is low, all excitations not of relay J 1, J2, J3.Gear control loop repeat circuit group as shown in Figure 4 drives the circuit theory diagrams of some divider resistances, it is the final operating part of gear control loop, combine to determine whether each divider resistance drops into by the different conditions of relay group, finally determine concrete when gear of dividing potential drop; Wherein, R1=2M Ω, R2=1.6M Ω, R3=360M Ω, R1A=2M Ω, R2A=1.6M Ω, R3A=360M Ω, R4=80K Ω; Node with all relays is all not closed, take the passage of alternating current-direct current 2000V, 1000V, 200V, 20V as example, is now 2000V shelves;
Work as CHn_H=0, it when CHn_L=1, is time top grade, CHn_J1 is output as height, CHn_J2, CHn_J3 output is low, relay J 1 excitation, all excitations not of J2, J3, the node J1.1 of J1 relay, J1.2 closure in Fig. 4, the node of J2, J3 relay is all not closed, take the passage of alternating current-direct current 2000V, 1000V, 200V, 20V as example, is now 1000V shelves;
Work as CHn_H=1, it when CHn_L=0, is time low grade, CHn_J1, CHn_J2 are output as height, CHn_J3 output is low, relay J 1, the equal excitation of J2, and J3 is excitation not, in Fig. 4, node J2.1, the J2.2 of node J1.1, the J1.2 of J1 relay, J2 relay are all closed, the node of J3 relay is all not closed, take the passage of alternating current-direct current 2000V, 1000V, 200V, 20V as example, is now 200V shelves;
Work as CHn_H=1, it when CHn_L=1, is deep low gear, CHn_J1, CHn_J2, CHn_J3 output are height, relay J 1, the equal excitation of J2, J3, in Fig. 4, node J3.1, the J3.2 of node J2.1, the J2.2 of node J1.1, the J1.2 of J1 relay, J2 relay electrical equipment, J3 relay are all closed, take the passage of alternating current-direct current 2000V, 1000V, 200V, 20V as example, be now 20V shelves.
TRIPn in Fig. 3 b is overvoltage protection signal (option); when overvoltage guard signal TRIPn is while being high; CHn_J1, CHn_J2, CHn_J3 output are all forced low; all excitations not of relay J 1, J2, J3; in Fig. 4, the node of all relays is all not closed; take the passage of alternating current-direct current 2000V, 1000V, 200V, 20V as example, now for being forced 2000V shelves.
Electric weight recorder analyser shown in Fig. 3 a is except comprising above-mentioned device, can also adopt other device in correlation technique to realize its function to circuit record analysis, for example, after signal transformation loop 24, connect multiway analog switch 25, A/D transducer 26 and buffer 27, the function of each device is identical with the function in Fig. 1, repeats no more here.Certainly, this electric weight recorder analyser also can adopt other similar structures to realize.
On every passage of the electric weight recorder analyser of the present embodiment, be provided with gear control loop 22, this gear control loop 22 can be according to current gear control signal by its inner programmable logic controller (PLC) 22a, triode array 22b and relay group 22c, by extremely corresponding gear of the gear switch on the passage of place, it is single fixing again that the input reference signal of each like this passage does not need, can be in each gear inner conversion, expand electric weight recorder analyser application scenarios, and this is simple in structure, be easy to realize.
Consider shown in Fig. 1 and Fig. 3 a in structure, each channel signal is carrying out before A/D conversion, need to be through the switching controls of analog multichannel switch, acquisition rate is difficult to improve, and can not realize real synchronous, also occurred simultaneously acquisition channel number may directly affect the highest sampling rate, can reach 100kHz as only gathered a channel signal time, but just can only be with the speed collection about 6kHz while gathering 16 passages.Based on this, the present embodiment improves above-mentioned electric weight recorder analyser, the structural representation of concrete electric weight recorder analyser as shown in Figure 5, this electric weight recorder analyser is except comprising above-mentioned gear control loop 22 and signal transformation loop 24, the output terminal that is also included in the signal transformation loop 24 of every passage is all connected with A/D transducer 32, for the simulating signal receiving on the passage of place is converted to digital signal, then digital signal is sent to buffer 34, each passage frequency acquisition can reach 409.6kHz.
The mode of an A/D transducer of the every channel setting of above-mentioned employing can make single channel and multichannel acquisition rate be consistent, bring great convenience to user like this, in the time that acquisition rate is set, no longer need to consider passage number, and as long as consider the needs of test.
For small-signal (as: generator rotor current shunt output voltage ratings is below 75mV) input channel, due to input impedance lower (being generally less than 1000 ohm), if there is signal wrong (as access, PT100 lies prostrate voltage etc.), electric weight recorder analyser is easy to just burnt, and security can not get ensureing.Based on this, on the electric weight recorder analyser basis shown in Fig. 5, Fig. 6 provides a kind of structural representation of electric weight recorder analyser, in this figure, on every passage, be provided with overvoltage protection loop 42, the input end in this overvoltage protection loop is connected with signal transformation loop 24, to receive through signal transformation loop 24 amplifying signals, produces overvoltage protection signal according to this amplifying signal; The output terminal in overvoltage protection loop 42 is connected with gear control loop 22, and this gear control loop 22, also in the time that overvoltage protection signal is high level, is forced extremely the gear switch on the passage of place high tap position.
The concrete structure in above-mentioned overvoltage protection loop can, with reference to shown in figure 7, comprise: the first resistance R 5 being connected with signal transformation loop;
The comparer 62 being connected with the other end of the first resistance R 5;
Other end ground connection with the second resistance R 6, the second resistance R 6 that between the first resistance R 5 and comparer 62, wire is connected.In this structure, suppose that the specified output (output when input equals the ratings of set position) of the signal transformation loop of each passage is 5V, R5 is 5K Ω, and R6 is 10K Ω, reality is inputted corresponding signal transformation loop output signal through resistance R 5, R6 divides and is depressed into himself 2/3, signal and 5V after dividing potential drop compare, in the time that signal is less than 5V, comparer 62 is output as low level, show that input signal does not exceed 1.5 times of gear ratings, protection is failure to actuate, in the time that this signal is greater than 5V, comparer 62 is output as high level, show that input signal has exceeded 1.5 times of gear ratings, protection action, the programmable logic controller (PLC) 22a(that this signal outputs in Fig. 3 b is specifically as follows GAL16V8) in, the gear of this passage is directly forced to high tap position by it.In this overvoltage protection mode, when the value of input voltage exceedes while setting 1.5 times of gear, protection action, and force the high tap position to this passage by gear switch, like this, even if signal wrong passage also can not be burnt, guarantee the security of instrument.
Electric weight recorder analyser shown in Fig. 6 can be realized following functions:
(1) access of external signal: each passage has 1 pair of input terminal, external signal is introduced directly into the gear control loop of each passage through input terminal.
(2) gear control and switching: the programmable logic controller (PLC) of gear control loop is accepted the gear control command that upper control analytical engine is set, gear control loop to corresponding gear, and carries out signal conversion for the first time to input signal by gear switch.If the overvoltage protection loop of this passage action, the output of programmable logic controller (PLC) is forced the most high-gradely, forces gear to be set to high tap position thereby control gear control loop.The signal transformation loop that the signal of input signal after the signal conversion for the first time of gear switch loop given this passage.
(3) signal carries out (isolation) conversion: signal transformation loop to signal isolate, the processing such as dividing potential drop, unsteady flow, input signal is transformed into the treatable small-signal of general mimic channel (generally below 10V).
(4) signal amplifies: the signal amplification unit of signal transformation loop is transformed into signal to demarcate standard signal unified, that A/D transducer can receive and give A/D transducer and the protection loop that this passage is corresponding.
(5.1) protection identification: the signal in input overvoltage protection loop first narrow down to itself 2/3 after compare again (being equal to the ratings comparison of input signal and 1.5 times) with the ratings of input A/D standard signal; in the time that input signal is less than 1.5 times of ratings, protect loop to be output as low, in the time that input signal is greater than 1.5 times of ratings, protect loop to be output as height.The output signal in overvoltage protection loop is given the programmable logic controller (PLC) of gear control loop.
(5.2) analog to digital conversion: convert the simulating signal of sending into A/D transducer to digital signal.
(6) data are temporary: the digital signal obtaining after A/D conversion is sent into buffer (for example: internal memory), and temporarily preserve.
(7) through engineering approaches of data and demonstration: upper control analytical engine converts the data of receiving to the quantities that can truly reflect external signal by certain transformational relation, and be presented on screen in the mode of squiggle or numerical value simultaneously.
(8) above-mentioned curve or numerical value are carried out to the analyzing and processing of data.
(9) preserve above-mentioned data and analysis result.
Above embodiment for example, by the independent program control stepping of each passage (: 4 gears of every passage), well solve that each channel measurement is range limited, the shortcoming of signal adaptation scarce capacity, when actual use, can configure most suitable passage according to conventional signal characteristic, concrete passage comprises:
A) alternating voltage passage: each alternating voltage channels designs AC15V, 150V, 750V, 1500V fourth gear, user can freely arrange according to the concrete condition of input signal, both can adopt 150V shelves to measure collection PT voltage, adopt the measurement of 750V shelves to gather the 690V voltage of 220V, 380V and the output of wind-powered electricity generation unit, the residual voltage (PT voltage is 3V left and right) that employing 15V shelves are measured collection generator, the adaptable occasion of same passage is greatly improved.
B) high voltage ac/dc voltage channel: each combined-voltage channels designs DC20V, 200V, 1000V, 2000V fourth gear (AC14V, 140V, 700V, 1400V fourth gear), user can freely arrange according to the concrete condition of input signal, both can work as alternating voltage passage and use, and also can work as DC voltage passage and use.
C) low-voltage AC/DC voltage channel: each combined-voltage channels designs DC200mV, 2V, 20V, 200V fourth gear (AC140mV, 1.4V, 14V, 140V fourth gear), user can freely arrange according to the concrete condition of input signal, both can work as alternating voltage passage and use, and also can work as DC voltage passage and use.
D) alterating and direct current circulation road: each ac and dc current channel setting gear is 1H, H/5, H/25,20mA fourth gear, wherein H represents the specified range (as 5A, 50A, 2000A etc.) of forcipated mutual-inductor used, alternating current adopts pincer (or flexible) mutual inductor, and the direct current 20mA electric current of transmitter output is directly inputted.
In above-described embodiment; adopt the method for automatic overvoltage protection to solve the problem that small-range passage easily burns; for example: when the value of input voltage exceedes while setting 1.5 times of gear; protection action; and force the high tap position to this passage by gear switch; like this, even if signal wrong passage also can not be burnt, guaranteed the security of instrument.As the passage for generator rotor current shunt output voltage, current same quasi-instrument amount of imports definite value is generally 100mV, input impedance lower (being generally less than 1000 ohm), employing range is 200mV, 2V, 20V, the program control passage of transferring the files of 200V, the 200mV shelves input impedance of this passage is 2000 ohm, while measuring shunt output voltage, adopt this shelves, if the 100V voltage of PT or other high voltage are accessed this passage by mistake when wiring, owing to exceeding 1.5 times of set gear 200mV, the protection loop action of this passage is also forced to 200V shelves by gear, and the input impedance of 200V shelves is 2 megaohms, even the voltage of kilovolt also can not be burnt in input, the security of this sampling instrument has obtained great assurance.
In above embodiment, front-collection device and the integrated design of upper control analytical engine, have the following advantages:
The independent use ability of i, instrument is improved, and no longer needs to connect with extra computer when use, brings great convenience to user.
The structural design of ii, the full almag cabinet of instrument integrated, is greatly improved the soundness of instrument, goes for complicated industrial environment.
Iii, employing high resolving power, low temperature resistant, the large liquid crystal display of high brightness, no matter can normally work instrument under cold field (30 °), the north or strong sunlight.
IV, display adopt cover up turning type, bring with using the same sensation of notebook computer to user, and convenience is greatly improved, the screen that closes while use, and the almag shell that 3mm is thick provides fabulous protection to fragile liquid crystal display.
V, built-in high-performance CPU(double-core 2.4G), large capacity internal memory (4GB), large capacity technical grade solid state hard disc (256GB) make the security of data-handling capacity, storage capacity and the data storage of instrument obtain powerful guarantee.
Vi, abundant interface resource (2 10/100/1000Mbps self-adaptation Ethernet interfaces, 5 USB2.0 interfaces, 1 RS485 interface, 1 differential type B code to time interface) have guaranteed the ability that instrument is connected with various external units, instrument both can use separately, also can be used in conjunction with by the computer in Ethernet and a distant place, and can many instrument parallel connections use, in parallel use guarantees each instrument synchronous acquisition.Instrument provides multiple kinds, so that in the time carrying out the aptitude tests of wind energy turbine set power tracking, can easily and obtain meritorious, idle distant value of establishing that scheduling sends with the control system interface of wind energy turbine set.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an electric weight recorder analyser, it is characterized in that, front-collection device and upper control analytical engine are structure as a whole, wherein, the main frame of described front-collection device and described upper control analytical engine is arranged in full almag cabinet, the liquid crystal display of described upper control analytical engine and described cabinet are eversion type structure and are arranged on outside described cabinet, described liquid crystal display is connected with the incline of the top cover of described cabinet by rotating shaft, and described liquid crystal display is connected with described main frame by the data line in rotating shaft;
The outside surface of the top cover of described cabinet is provided with the keyboard and the mouse touch pad that are connected with described main frame, and the degree of depth of the display screen indent of described liquid crystal display is greater than the height of described keyboard;
The rear wall of described cabinet is provided with the signals collecting interface that described front-collection device is corresponding, is provided with the power supply interface of described front-collection device and described main frame on the sidewall of described cabinet, and corresponding described main frame outreach interface.
2. electric weight recorder analyser according to claim 1, is characterized in that, described main frame comprises: the double-core CPU of 2.4GB, 4GB internal memory, 256GB hard disk.
3. electric weight recorder analyser according to claim 1, is characterized in that, described in outreach interface and comprise: 2 self-adaptation Ethernet interfaces, 5 USB interface, 1 RS485 interface and 1 differential type B code to time interface.
4. electric weight recorder analyser according to claim 1, it is characterized in that, on every passage of described front-collection device, be provided with gear control loop, it is provided with pair of input terminals, and the external signal that this input terminal receives transfers to signal transformation loop through described gear control loop; Each described gear control loop includes: connected programmable logic controller (PLC), triode array, relay group and some divider resistances successively, for the gear control signal issuing according to upper control analytical engine, by extremely corresponding gear of the gear switch on the passage of place.
5. electric weight recorder analyser according to claim 4, it is characterized in that, the output terminal of the described signal transformation loop of every passage is all connected with A/D transducer, for the simulating signal receiving on the passage of place is converted to digital signal, then described digital signal is sent to buffer.
6. electric weight recorder analyser according to claim 4, it is characterized in that, on every passage, be provided with overvoltage protection loop, the input end in described overvoltage protection loop is connected with described signal transformation loop, to receive through described signal transformation loop amplifying signal, produce overvoltage protection signal according to described amplifying signal; The output terminal in described overvoltage protection loop is connected with described gear control loop, and described gear control loop, also in the time that described overvoltage protection signal is high level, is forced extremely the gear switch on the passage of place high tap position.
7. electric weight recorder analyser according to claim 6, is characterized in that, described overvoltage protection loop comprises:
The first resistance being connected with described signal transformation loop;
The comparer being connected with the other end of described the first resistance;
With the second resistance being connected between described the first resistance and described comparer, the other end ground connection of described the second resistance.
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