CN1016815B - Universal test, control module - Google Patents

Universal test, control module

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Publication number
CN1016815B
CN1016815B CN 88103027 CN88103027A CN1016815B CN 1016815 B CN1016815 B CN 1016815B CN 88103027 CN88103027 CN 88103027 CN 88103027 A CN88103027 A CN 88103027A CN 1016815 B CN1016815 B CN 1016815B
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CN
China
Prior art keywords
output
resistance
module
link
vir
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Expired
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CN 88103027
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Chinese (zh)
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CN1037980A (en
Inventor
杨共鸣
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WUHAN SEMICONDUCTOR DEVICE FACTORY
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WUHAN SEMICONDUCTOR DEVICE FACTORY
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Priority to CN 88103027 priority Critical patent/CN1016815B/en
Publication of CN1037980A publication Critical patent/CN1037980A/en
Publication of CN1016815B publication Critical patent/CN1016815B/en
Expired legal-status Critical Current

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Abstract

The present invention relates to a kind of general module that is used for measurement automatically and control system, voltage, electric current, multiple test control function of time on described this module, have been concentrated, wherein very crucial VIR functional unit only is made of four amplifiers, and the various functions that this module had are by relay contact J 1～J nFolding change circuit form and obtain, module of the present invention and system can be widely used in industry and all kinds of observing and controlling occasions in laboratory.

Description

Universal test, control module
The present invention relates to a kind of general module that is used for measurement automatically and control system, and the computer system of managing and use this module, voltage, electric current, multiple test control function of time on described a kind of like this module, concentrated.
This century the seventies begin, along with microelectric technique and development of computer, parts or module that Measurement and Control System and specifically being used to is measured control have had very big variation, couple together with one group of bus between module and the computing machine, according to different measurement controlling object, select corresponding functional modules, the module of various difference in functionalitys to be subjected to computer control to go to finish separately particular task, the situation of Here it is existing control system and module.Late nineteen seventies, early eighties, the function of single module has had very great development, the module that has has the function of the various different wave of output, the module that has has the function of measuring various waveform parameters, but also there is not a kind of like this general module, it can concentrate finish measure control function again can two-way operation, owing to this reason, in measurement and control area, we must be at different measuring and controlling object, the configuration different system, it is many that this has just produced hardware configuration, the supervisory routine complexity, shortcomings such as system is numerous and jumbled are given to produce to use and are made troubles.
One of the object of the invention is to propose a kind of general module, this module has been concentrated all functions of existing module basically, be that energy measurement control again can two-way operation, and its circuit is very simple, another object of the present invention is to be basic module with the module that is proposed, under computer control, create a kind of general automatic working system, computing machine is connected with one or more general modules by its bus, measuredly link to each other with the output line of general module with controll plant, this has just constituted a kind of computer system of the present invention, this system is under its supervisory routine control, can finish each part simultaneously measures and control task, the expansion of this system, connection and operation are all very convenient, this is except the function of supervisory routine design aspect, outside the skill, more aspect then mainly be have benefited from the present invention the support of a kind of general module that will introduce especially.
Below content of the present invention is set forth.
General module of the present invention has following function under computer control:
1. can export constant voltage arbitrarily, and electric current can two-way flow;
2. can export steady current arbitrarily;
3. can accept the effect of tested control as resistance, its resistance can be provided with arbitrarily;
4. can open a way fully, promptly when it is connected with tested control, it not exerted an influence;
5. can export voltage or current waveform arbitrarily;
Energy measurement observing and controlling part apply or himself output voltage and current;
7. energy measurement time.
Module with numerous functions like this, its circuit structure are but very not complicated.Fig. 1 is the inner structure block scheme of general module, and order latch units (3) is deposited output, measurement function and the electric current of required realization, the command code of voltage range; The value code that data latch unit (4) is deposited required output current, voltage; Analog to digital converter (5) is surveyed analog quantity with institute and is converted to digital quantity; Status buffer (6) reflection analog to digital converter (5), timer (7) and electric current, the residing status information of voltage; Timer (7) is measured the time of electric current, change in voltage; They all pass through data transmit-receive unit (2) and are connected with the data bus of computing machine; Address decoding unit (1) is then specified the address of exchange message unit; VIR functional unit (8) (" V " expression output and measuring voltage, " I " expression output and measurement electric current; " R " represents pull-up resistor) specified voltage, electric current, resistance or the open loop state of output code under the effect of command code and data code then, and it and measured piece results of interaction (voltage, electric current) is informed A/D converter, timer and status buffer.
The key that the present invention shows unique characteristics is that in the VIR functional unit, its circuit theory is seen Fig. 2.
The VIR functional unit by four or four above amplifiers as basic building block, by relay or similar device contacts J 1～J nFolding and change circuit form or be called and select different feedback systems, reach the purpose of VIR output input conversion.Its concrete line construction is like this: data code is transformed to analog current signal through J through D/A converter 1To the inverting input that drives amplifier (14), the size and the polarity of control amplifier (14) output quantity, the output of amplifier (14) is through current sampling resistor R gAnd J 7Arrive by the observing and controlling object, the positive input terminal of voltage follower (11) links to each other with the output of VIR functional unit, and the output terminal of amplifier (14) is also simultaneously through resistance R aLink to each other with the negative input end of phase inverter (12), Ra, Rb, Rc and phase inverter (12) are formed a complete inverter circuit; The negative input end of totalizer (13) is parallel with three road resistance, and one the tunnel is that one the tunnel is through R through the output signal of the phase inverter (12) of resistance R c introducing fVoltage follower (11) output voltage signal of introducing, the one tunnel is totalizer (13) feedback resistance R dAn end; Contact J 1, J 2, J 3, J 4An end with being connected on the negative input end of amplifier (14) J 1The other end and general module in digital-to-analogue output link to each other; Digital to analog converter link to each other with data latches (4) (do not indicate among Fig. 1, can think to be included in data latches in); J 2The other end through resistance R eLink to each other with the output terminal of totalizer (13); J 3The other end and J 4The other end respectively through resistance R vAnd R rLink to each other with the output terminal of voltage follower (11); J 6An end link to each other J with the output terminal of totalizer (13) 5, J 6The other end all be connected on the analog to digital converter.
Under system supervisor control, work as J 1, J 3, J 7Adhesive, J 2, J 4During disconnection, the VIR cell operation according to the amplifier fundamental property, is not difficult to draw following derivation and conclusion at the constant voltage output state:
IL＋ (V O)/(R V) ＝0;V o＝-RvIi
Ii is the digital to analog converter output current in the formula, V 0Be VIR unit output voltage, I 0Be output current, by formula V 0=-RvIi is output voltage V as can be known 0Size be directly proportional with the numerical value of input Control current Ii, the ratio multiple is exactly a resistance R vResistance, and with output current I 0Size irrelevant, a kind of stable voltage output promptly is provided;
Under system supervisor control, work as J 1, J 2, J 7Adhesive, and J 3, J 4During disconnection, the VIR cell operation is under the constant current output state, if set resistance R f=(R aR c)/R b, according to the amplifier fundamental property, be not difficult to draw as drawing a conclusion:
I 0＝ (Rf)/(Rd) · (Re)/(Rg) ·Ii
By following formula output current I as can be known OWith input Control current I iBe directly proportional, its ratio multiple is by three feedback resistance R f, R d, R eWith a current sampling resistor R gDecision is with output voltage V OSize irrelevant, just said constant current output;
Under system supervisor control, work as J 2, J 4, J 7Adhesive, J 1, J 3During disconnection, output Control current I iBlocked, the VIR cell operation is at the constant-resistance output state, and is same if set R f=R aR c/ R b, according to the amplifier fundamental property, be not difficult to release as draw a conclusion:
R O ≈ R r R e · R a R f ·R g
R in the formula 0=V 0/ I 0For the output equivalent impedance of VIR unit, by R 0=(R rR d/ R eR f) R gFormula is R as can be known 0The voltage V that applies with the external world 0, electric current I 0Irrelevant, only depend on the configuration of road internal resistance value, change R gResistance is a may command output resistance range, changes R rCan determine output resistance numerical value.
Under the constant-resistance output state, if make J 7Disconnect, current sampling resistor just approaches J 7Leakage resistance, and equivalent output resistance is the R of leakage resistance rR d/ R eR fDoubly, if make J simultaneously 4Disconnect R rJust increase to J 4Leakage resistance, at this moment equivalent output resistance just is similar to infinity.
The output voltage of voltage follower (11) equals the output voltage V of VIR unit 0, the output voltage of totalizer (13) is proportional to the output current I of VIR unit 0When the constant-resistance output state, the inverting input that drives amplifier (14) has applied module output voltage and output current negative feedback, the key that this makes this module show unique characteristics just simultaneously.
The module output voltage sampled signal of voltage follower (11) output is through J 5To analog to digital converter, the module output current sampled signal of totalizer (13) output is through J 6To analog to digital converter, control J 5, J 6Folding, just can measure the curtage of module output input.Computing machine is input to data in the module according to routine change, and module is voltage, the current wave of exportable definite shape.
When being operated in constant voltage zero, general module lies prostrate under the output state, and J 5Closure, J 6During disconnection, module promptly works in the electric current input state, at this moment can be from the electric current of its input end input 0～10vnA or 4～20mA; When general module is operated in open-circuit condition, and J 5Disconnect J 6Module is operated in the voltage input state during adhesive, at this moment from its input end can import 0～10V or-voltage of different range such as 10～10V; The said two devices principle is a thing fully aware of, so do not give unnecessary details.
Under computer control, general module of the present invention can be carried out the output of constant voltage, constant current, constant-resistance, open circuit and various waveforms, can finish test to various electric signal and semiconductor devices, bigger drive current and voltage can be provided, connect upper sensor and also can measure various physical quantitys, it is of great advantage that this improves scientific research and development efficient for the speed production automated process.
Introduce accompanying drawing and performance now.
Fig. 1 is the general module interior block diagram.(1) is address decoder among the figure, and (2) are data collector, and (3) are the order latch, and (4) are data latches, and (5) are A/D converter, and (6) are status buffer, and (7) are timer, and (8) are the VIR functional unit.
Fig. 2 is a VIR element circuit schematic diagram.(14) are the driving amplifier among the figure, and (13) are totalizer, and (12) are inverting amplifier, and (11) are voltage follower, J 1～J 7Be relay or similar device contacts, current sampling resistor R gOn can some resistance R in parallel G-1, R G-2To change current range, under system supervisor control, R rAnd R gVarious combination constant-resistance output impedance is changed in 25 Ω～20M Ω scope.(14) can select high-power, high-speed, wide band amplifier for use, for guaranteeing low drift of its output and high stability, also require it that higher input impedance is arranged, consider that its output has the possibility of short circuit when programming, also require it to have the output short circuit protection function, that select for use is LF357 herein, in order to increase its output power, can be connected in series a power amplifier after (14); Amplifier (11), (12), (13) are also selected LF357 for use;
Fig. 3 is the timer circuit schematic diagram.(21) are comparer among the figure, and (22) are trigger, and (23) are gate circuit, and (24) are counter.Its course of work is like this, under the effect of command code, produce timing commencing signal ST, allow rest-set flip-flop set, it makes clock signal pass through gate circuit (23) and makes counter (24) counting, if the curtage signal of measuring surpass gate signal given level, comparer (21) output hopping resets rest-set flip-flop, closes gate circuit, counter is quit work, and the data of counter send computing machine to by data collector just can calculate the used time of preset level that reaches.
Fig. 4 is the block diagram of one of system's connection form, and control module all is attempted by on the external bus of computing machine.The number of module equals by the observing and controlling object number.The output of each module (going into) line only link to each other (common ground wire) with an outer lead of observing and controlling object.All module all cooperates in harmony under the unified control of computing machine, automatically performs the TT﹠C task of appointment.

Claims (4)

1, a kind of general module that is used for measurement automatically and control system, it comprises the program of this module of cover management, module links to each other with computing machine by bus, module itself comprises address decoder (1), data collector (2), order latch (3), data latches (4), analog to digital converter (5), status buffer (6), timer (7), VIR functional unit (8), it is characterized in that VIR functional unit in the described general module has four or four above amplifiers as basic building block, thereby and be provided with and be used to change its circuit form and reach the relay of its duty of conversion or the contact J of similar device 1～J n, particularly,, be applied with simultaneously in order to realize the two-way feedback signal of constant-resistance output services mode at the input end that is in the locational driving amplifier of major loop (14), promptly be applied with general module output voltage and output current negative feedback simultaneously.
2, general module according to claim 1, it is characterized in that the circuit connecting mode of described VIR functional unit is: data code is transformed to analog current signal through J through D/A converter 1To the inverting input that drives amplifier (14), the output current of amplifier (14) is through sample resistance R 9And J 1Arrive by the observing and controlling object, the positive input terminal of voltage follower (11) links to each other with the output of VIR functional unit, and the output terminal of amplifier (14) is also simultaneously through resistance R aLink to each other R with the negative input end of phase inverter (12) a, R b, R cForm a complete inverter circuit with phase inverter (12); The negative input end of totalizer (13) is parallel with three road resistance, and one the tunnel is through resistance R cThe output voltage signal of the phase inverter of introducing (12), the one tunnel is through R fThe output voltage signal of the voltage follower of introducing (11), the one tunnel is totalizer (13) feedback resistance R dAn end; Contact J 1, J 2, J 3, J 4, an end is with being connected on the negative input end of amplifier (14) J 1The other end and general module in digital-to-analogue output link to each other digital to analog converter link to each other with data latches (4) (not indicating among Fig. 1 that it is interior to think to be included in data latches); J 2The other end through resistance R 6Link to each other with the output terminal of totalizer (13); J 3The other end and J 4The other end respectively through resistance R vAnd R rLink to each other with the output terminal of voltage follower (11); J 6The other end link to each other J with the output terminal of totalizer (13) 5An end link to each other J with the output of voltage follower (11) 5J 6The other end all be connected on the analog to digital converter.
3, general module according to claim 2 is characterized in that resistance R in the VIR functional unit fResistance is according to formula: R f=R aR c/ R bSelect.
4, general module according to claim 1 is characterized in that described computer system connects by described general module with measuring between the controlling object.
CN 88103027 1988-05-20 1988-05-20 Universal test, control module Expired CN1016815B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 88103027 CN1016815B (en) 1988-05-20 1988-05-20 Universal test, control module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 88103027 CN1016815B (en) 1988-05-20 1988-05-20 Universal test, control module

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CN1037980A CN1037980A (en) 1989-12-13
CN1016815B true CN1016815B (en) 1992-05-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101295526A (en) * 1994-04-18 2008-10-29 松下电器产业株式会社 Information processing unit
US5623684A (en) * 1994-05-17 1997-04-22 Commquest Technologies, Inc. Application specific processor architecture comprising pre-designed reconfigurable application elements interconnected via a bus with high-level statements controlling configuration and data routing

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