CN107300681A - A kind of multi-channel measurement circuit design - Google Patents
A kind of multi-channel measurement circuit design Download PDFInfo
- Publication number
- CN107300681A CN107300681A CN201710320349.7A CN201710320349A CN107300681A CN 107300681 A CN107300681 A CN 107300681A CN 201710320349 A CN201710320349 A CN 201710320349A CN 107300681 A CN107300681 A CN 107300681A
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- Prior art keywords
- circuit
- measurement
- self
- inspection
- band switch
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Abstract
A kind of multi-channel measurement circuit design.The invention belongs to signal detection field, it is related to a signal measurement technique, a kind of many Measurement channel measurement signals distribution control based on band switch and built in test slowdown monitoring circuit design method is specifically provided.The measuring circuit makes full use of the characteristics of throwing band switch a knife more, controlled by 2 band switch gear switches, the height that external measuring circuit is solved with " built in test " circuit is merged, not only realize the signal reasonable distribution of many Measurement channels, and comprehensive quick " self-inspection " of many Measurement channels is realized, improve self-inspection efficiency.Specifically " closed-loop path " is devised between the measured point of each group so that self-test operations and test operation are basically identical, and operating process intuitive is strong.It can at any time select to carry out " self-inspection " to the state of any pair of Measurement channel in the case where not turning off measurand.The circuit autgmentability is strong simultaneously, applies also for being segmented Measurement channel by connector (or adapter) situation of docking or extended line.
Description
Technical field
The invention belongs to signal detection field, it is related to a signal measurement technique.
Background technology
When electronics are carried out with the measurement of multi-point path or insulating properties test, how before measuring or measurement process
In, the connected state (path is normal, breaking or circuit impedance is abnormal etc.) of multigroup Measurement channel is checked or verified, is related to test
As a result accuracy and credibility.Particularly in the case where measurement result is overproof, how by equipment built in test, it is determined that surveying
Measure result unrelated in itself with test equipment, it appears most important.Equipment self-inspection generally uses following three kinds of modes：One is with test
The measurement module of device interior connects self-inspection simulator, realization pair as instrumentation in the interface end being connected with measurand
Many Measurement channels connect " self-inspection " of situation；Two be from the interface end being connected with measurand, manually by multigroup measurement is logical
Road is shorted to together with wire, while with the measuring instrumentss inside external measuring instrumentss or test equipment, realizing to Measurement channel
" self-inspection " of connection situation；Three be the interface end and Measurement channel and tested pair from measurement module in Measurement channel and test equipment
As the interface end of connection, realized with external instrumentation and Measurement channel connected state is checked or verified, this method is usual
It is also to use manually to make an inventory of, Measurement channel is detected successively.Using the method for self-inspection simulator, it is necessary to specially develop supporting
Self-checking equipment, cost height uses also inconvenient；Using the method for artificial point-to-point measurement, operating process is cumbersome, and detection efficiency is low.
The content of the invention
The purpose of the present invention is：There is provided in a kind of many Measurement channel measurement signals distribution control and machine based on band switch
Self-detection circuit design method.
The present invention is achieved through the following technical solutions：
1. a kind of multi-channel measurement circuit design (see accompanying drawing 1), in 2 prime measurement point JC1, JC2 and any two quilt
Between test point Aj, Bj (j=1,2,3 ..., N are integer, similarly hereinafter), a 2 knife multi gear (or being thrown a knife) wave bands of series connection are opened more
Close Ka, Kb.Ka-Mo, Ka-Mp are connected with JC1, JC2 respectively, and Kb-Mo, Kb-Mp are connected with Ka-o-u, Ka-p-u respectively, Kb-o-
I (i=1,2,3 ..., N are integer, similarly hereinafter), Kb-p-i are connected with Aj, Bj respectively, it is characterised in that：
(1) Ka-o-u is connected with Ka-o-v, forms gear parallel relationship；
(2) Ka-p-u is connected with Ka-p-v, forms gear parallel relationship；
(3) Kb-q-i, Kb-r-i are connected with Aj, Bj respectively；
(4) Kb-Mq is connected with Ka-Mq, and Kb-Mr is connected with Ka-Mr, and Ka-q-v is connected with Ka-r-v (constitutes short circuit even
Connect).
2. the measuring circuit according to 1., it is characterised in that：The electricity between circuit, JC2 and Bj between JC1 and Aj
Connector (or adapter) SP (w) or SP is in series with the circuit between circuit, Kb-Mr and Bj between road, Ka-Mq and Aj
Or SP (y) or SP (z) (x).
The invention has the advantages that：
The present invention reaches following effect：Circuit between this 2 nodes of Kb-o-i and Aj constitutes Measurement channel CAij；Kb-
Circuit between this 2 nodes of p-i and Bj constitutes Measurement channel CBij；Circuit between this 2 nodes of Kb-q-i and Aj is constituted
Self-inspection passage ZAij；Circuit between this 2 nodes of Kb-r-i and Bj constitutes self-inspection passage ZBij.In band switch Ka u
Gear, band switch Kb the i-th gear connect in the case of, JC1, JC2 and Aj, Bj respectively by cross JC1, Ka-Mo, Ka-o-u,
The circuit of Kb-Mo, Kb-o-i, Aj point and excessively JC2, Ka-Mp, Ka-p-u, Kb-Mp, Kb-p-i, Bj's is electrically connected to together,
Form Measurement channel JC1-Aij, JC2-Bij；The feelings that i-th gear of v gears, band switch Kb in band switch Ka is connected
Under condition, Aj, Bj by cross Aj, Kb-q-i, Kb-Mq, Ka-Mq, Ka-q-v, Ka-r-v, Ka-Mr, Kb-Mr, Kb-r-i, Bj point electricity
It is short out to be connected together, form self-inspection loop ZAij-ZBij；ZAij-ZBij, JC1-ZAij, JC2-ZBij link together composition
Self-inspection closed-loop path H.Can by connected state from this 2 points of JC1, JC2 measurement self-inspection closed-loop path H (path is normal, open circuit,
Circuit impedance is abnormal etc.), and diagnostic measurement passage JC1-Aij and Measurement channel JC2-Bij connect situation.
Present invention contrast prior art has following remarkable advantage：(1) circuit design, is not only realized by band switch
Kb controls the distribution of many Measurement channels, and realize Measurement channel JC1-Aij (in addition to Ka-Mo to Ka-o-u contact terminals),
Comprehensive quick " self-inspection " of JC2-Bij (in addition to Ka-Mp to Ka-p-u contact terminals) Measurement channel, improves self-inspection efficiency.(2) it is electric
Road is succinct, and easy to operate, self-test operations and test operation are basically identical, and operating process intuitive is strong.Tested pair can not turned off
As in the case of, select to carry out " self-inspection " to the state of any pair of Measurement channel at any time, it may also be said to realize " online " certainly
Inspection.(3) the circuit autgmentability is strong, and can realizing extension according to similar circuit theory, (such as same with band switch Kb is more
Individual band switch is connected on band switch Ka gear terminal in parallel).The circuit also expansible be applied to passes through
Measurement channel is segmented the situation of docking or extended line by connector (or adapter).
Brief description of the drawings
Fig. 1 and Fig. 2 is schematic diagram of the invention；Fig. 3 and Fig. 4 is Example 1 and Example 2 of the present invention.Fig. 1 is into Fig. 4：
K represents band switch；Ka, Kb represent band switch (a, b are band switch K identification number)；O, p, q, r represent that wave band is opened respectively
Close certain 4 layer in K；U, v represent band switch K certain 2 gear respectively；I represents i-th of gear on band switch K；Ripple
The method for expressing of some gear terminal is that " identification number-layer-gear " (such as Kb-o-i represents band switch Kb o on Duan Kaiguan K
The gear terminal of upper i-th of the gear of layer)；On band switch K the method for expressing of some public terminal be "-M layers of identification number " (for example
Ka-Mo represents upper o layers of band switch Ka public terminal).JC1, JC2 represent 2 prime measurement points；Aj, Bj represent any
Two tested measuring points；CAij, CBij represent the Measurement channel associated with parameter i, j；ZAij, ZBij are represented and parameter i, j phase
The self-inspection passage of association.SP (w), SP (x), SP (y), SP (z) represent any one or one group of connector (or adapter) respectively；
SP (1), SP (2), SP (3) represent 3 specific connectors (or adapter) respectively.
Embodiment：
The invention will be further described in conjunction with the accompanying drawings and embodiments.
Embodiment 1：
The present embodiment provides the specific implementation shown in a kind of accompanying drawing 1.Circuit in accompanying drawing 3 is principle electricity in accompanying drawing 1
The concrete application on road, accompanying drawing 3 is embodied to some free parameters in accompanying drawing 1, is described as follows：A, b take 2,1 respectively；I points
Do not take 1,2,3 three kind of situation；J takes 1 respectively, 2,3 three kind of situation；O, p, q, r take 1,2,3,4 respectively；U, v take 1,2 respectively.
2 Ge Hang Star, one knife, 12 grades of 4 layers of band switches are purchased as K1, K2, the silver-plated RVV of 1.0 squares of 2 disk is purchased
It is used as the signal wire of measuring circuit.To specifications the circuit production shown in accompanying drawing 3 go out one to 3 groups of tested measuring points (A1, B1),
The physical circuit that (A2, B2), (A3, B3) are measured.Measuring instrumentss are used as using excellent sharp moral UT10 universal meters.
JC1, JC2 connect two test sides of measuring instrumentss respectively.K2-M1, K2-M2 are connected with JC1, JC2 respectively；K1-M1
It is connected with K2-1-1；K2-1-1 is connected with K2-1-2；K1-M2 is connected with K2-2-1；K2-2-1 is connected with K2-2-2；K1-M3 and
K2-M3 is connected；K1-M4 is connected with K2-M4；K2-3-2 is connected with K2-4-2.
K1-1-1, K1-3-1 are connected with A1 respectively, and K1-2-1, K1-4-1 are connected with B1 respectively.
K1-1-2, K1-3-2 are connected with A2 respectively, and K1-2-2, K1-4-2 are connected with B2 respectively.
K1-1-3, K1-3-3 are connected with A3 respectively, and K1-2-3, K1-4-3 are connected with B3 respectively.
So, the circuit between this 2 nodes of K1-1-1 and A1 constitutes Measurement channel CA11；This 2 sections of K1-2-1 and B1
Circuit between point constitutes Measurement channel CB11；Circuit between this 2 nodes of K1-3-1 and A1 constitutes self-inspection passage ZA11；
Circuit between this 2 nodes of K1-4-1 and B1 constitutes self-inspection passage ZB11.In band switch K2 the 1st gear, band switch
In the case that K1 the 1st gear is connected, JC1, JC2 and A1, B1 respectively by cross JC1, K2-M1, K2-1-1, K1-M1, K1-1-1,
The circuit of A1 points and excessively JC2, K2-M2, K2-2-1, K1-M2, K1-2-1, B1's is electrically connected to together, formation Measurement channel
JC1-A11、JC2-B11.In the case that 1st gear of the 2nd gear, band switch K1 in band switch K2 is connected, A1, B1 by
The short circuit of A1, K1-3-1, K1-M3, K2-M3, K2-3-2, K2-4-2, K2-M4, K1-M4, K1-4-1, B1 point is crossed one
Rise, form self-inspection loop ZA11-ZB11；ZA11-ZB11, JC1-ZA11, JC2-ZB11 link together composition self-inspection close back
Road H1.
, can be by from JC1, JC2 in the case that 1st gear of the 2nd gear, band switch K1 in band switch K2 is connected
This 2 points measurement self-inspection closed-loop path H1 connected state (path is normal, breaking, circuit impedance is abnormal etc.) is diagnosed to be Measurement channel
Connection situation.Concrete scheme：
From JC1, JC2 end measurement self-inspection closed-loop path resistance, obtain resistance value R1, then wall scroll Measurement channel JC1-A11 or
JC2-B11 via resistance RT1 numerical value is about a quarter of R1 values.If resistance value RT1 is in the reasonable scope, illustrate to survey
Measure circuit normal；If RT1 resistance values are more than resistance value R0 as defined in Measurement channel, illustrate that measuring circuit may be faulty, need
Want further fault inspecting whether logical in Measurement channel JC1-A11 (in addition to K2-M1 to K2-1-1 contact terminals) and measurement
On road JC2-B11 (in addition to K2-M2 to K2-2-1 contact terminals).
Equally, the circuit between this 2 nodes of K1-1-2 and A2 constitutes Measurement channel CA22；This 2 sections of K1-2-2 and B2
Circuit between point constitutes Measurement channel CB22；Circuit between this 2 nodes of K1-3-2 and A2 constitutes self-inspection passage ZA22；
Circuit between this 2 nodes of K1-4-2 and B2 constitutes self-inspection passage ZB22.In band switch K2 the 1st gear, band switch
In the case that K1 the 2nd gear is connected, JC1, JC2 and A2, B2 respectively by cross JC1, K2-M1, K2-1-1, K1-M1, K1-1-2,
The circuit of A2 points and excessively JC2, K2-M2, K2-2-1, K1-M2, K1-2-2, B2's is electrically connected to together, formation Measurement channel
JC1-A22、JC2-B22.In the case that 2nd gear of the 2nd gear, band switch K1 in band switch K2 is connected, A2, B2 by
The short circuit of A2, K1-3-2, K1-M3, K2-M3, K2-3-2, K2-4-2, K2-M4, K1-M4, K1-4-2, B2 point is crossed one
Rise, form self-inspection loop ZA22-ZB22；ZA22-ZB22, JC1-ZA22, JC2-ZB22 link together composition self-inspection close back
Road H2.
, can be by from JC1, JC2 in the case that 2nd gear of the 2nd gear, band switch K1 in band switch K2 is connected
This 2 points measurement self-inspection closed-loop path H2 connected state (path is normal, breaking, circuit impedance is abnormal etc.) is diagnosed to be Measurement channel
Connection situation.Concrete scheme：
From JC1, JC2 end measurement self-inspection closed-loop path resistance, obtain resistance value R2, then wall scroll Measurement channel JC1-A22 or
JC2-B22 via resistance RT3 numerical value is about a quarter of R2 values.If resistance value RT2 is in the reasonable scope, illustrate to survey
Measure circuit normal；If RT2 resistance values are more than resistance value R0 as defined in Measurement channel, illustrate that measuring circuit may be faulty, need
Want further fault inspecting whether logical in Measurement channel JC1-A22 (in addition to K2-M1 to K2-1-1 contact terminals) and measurement
On road JC2-B22 (in addition to K2-M2 to K2-2-1 contact terminals).
Equally, the circuit between this 2 nodes of K1-1-3 and A3 constitutes Measurement channel CA33；This 2 sections of K1-2-3 and B3
Circuit between point constitutes Measurement channel CB33；Circuit between this 2 nodes of K1-3-3 and A3 constitutes self-inspection passage ZA33；
Circuit between this 2 nodes of K1-4-3 and B3 constitutes self-inspection passage ZB33.In band switch K2 the 1st gear, band switch
In the case that K1 the 3rd gear is connected, JC1, JC2 and A3, B3 respectively by cross JC1, K2-M1, K2-1-1, K1-M1, K1-1-3,
The circuit of A3 points and excessively JC2, K2-M2, K2-2-1, K1-M2, K1-2-3, B3's is electrically connected to together, formation Measurement channel
JC1-A33、JC2-B33.In the case that 3rd gear of the 2nd gear, band switch K1 in band switch K2 is connected, A3, B3 by
The short circuit of A3, K1-3-3, K1-M3, K2-M3, K2-3-2, K2-4-2, K2-M4, K1-M4, K1-4-3, B3 point is crossed one
Rise, form self-inspection loop ZA33-ZB33；ZA33-ZB33, JC1-ZA33, JC2-ZB33 link together composition self-inspection close back
Road H3.
, can be by from JC1, JC2 in the case that 3rd gear of the 2nd gear, band switch K1 in band switch K2 is connected
This 2 points measurement self-inspection closed-loop path H3 connected state (path is normal, breaking, circuit impedance is abnormal etc.) is diagnosed to be Measurement channel
Connection situation.Concrete scheme：
From JC1, JC2 end measurement self-inspection closed-loop path resistance, obtain resistance value R3, then wall scroll Measurement channel JC1-A33 or
JC2-B33 via resistance RT3 numerical value is about a quarter of R3 values.If resistance value RT3 is in the reasonable scope, illustrate to survey
Measure circuit normal；If RT3 resistance values are more than resistance value R0 as defined in Measurement channel, illustrate that measuring circuit may be faulty, need
Want further fault inspecting whether logical in Measurement channel JC1-A33 (in addition to K2-M1 to K2-1-1 contact terminals) and measurement
On road JC2-B33 (in addition to K2-M2 to K2-2-1 contact terminals).
Embodiment 2：
The present embodiment provides a specific case for adding 3 connectors (or adapter) on the basis of embodiment 1
Example, physical circuit connection figure is shown in Figure of description 4.Accompanying drawing 4 and accompanying drawing 3 compare, 2 connections of having been connected on Measurement channel CB11
Device Sp (1), Sp (3), connected connector Sp (2) on self-inspection path ZA22.
In actual applications, JC1-A11, JC2-B11 connected state are measured from JC1, JC2 end, it can be determined that go out
Connector (or adapter) Sp (1), Sp (3) connected state (path is normal, breaking, circuit impedance is abnormal etc.)；From JC1, JC2
End is measured to JC1-A22, JC2-B22 connected state, can detect connector (or adapter) Sp (2) connected state
(path is normal, breaking, circuit impedance is abnormal etc.), is repeated no more here.
In real work, the Measurement channel number and connector being related to often exceed embodiment 1 and the case described in embodiment 2
Example.In fact, circuit design method of the present invention, with good autgmentability.Using the present invention, we also design and produce
There are 24 drive test amount channel signal selection controls and certain type of " self-inspection " ability conducting insulation tester, and the application present invention into
Work(detects into the abnormal situation of the corresponding Measurement channel resistance of the 5th gear of band switch K1 and has been accurately positioned trouble point,
Demonstrate the actual application value of the present invention.
Above example combination accompanying drawing is described to the embodiment of the present invention, but these explanations do not make sense
To limit the scope of the present invention, protection scope of the present invention is limited by appended claims, any in right of the present invention
It is required that on the basis of change be all protection scope of the present invention.
Claims (2)
1. a kind of multi-channel measurement circuit design, measuring point Aj, Bj (j are detected in 2 prime measurement point JC1, JC2 and any two
=1,2,3 ..., N are integer, similarly hereinafter) between, connecting 2 a knife multi gears (or being thrown a knife) band switch Ka, Kb more.Ka-
Mo, Ka-Mp are connected with JC1, JC2 respectively, and Kb-Mo, Kb-Mp are connected with Ka-o-u, Ka-p-u respectively, Kb-o-i (i=1,2,
3 ..., N are integer, similarly hereinafter), Kb-p-i is connected with Aj, Bj respectively, it is characterised in that：(1) Ka-o-u is connected with Ka-o-v, shape
Into gear parallel relationship；(2) Ka-p-u is connected with Ka-p-v, forms gear parallel relationship；(3) Kb-q-i, Kb-r-i respectively and
Aj, Bj are connected；(4) Kb-Mq is connected with Ka-Mq, and Kb-Mr is connected with Ka-Mr, and Ka-q-v is connected with Ka-r-v (constitutes short circuit even
Connect).
2. the measuring circuit according to 1., it is characterised in that：The circuit between circuit, JC2 and Bj between JC1 and Aj,
Be in series with the circuit between circuit, Kb-Mr and Bj between Ka-Mq and Aj connector (or adapter) SP (w) or SP (x) or
SP (y) or SP (z).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710320349.7A CN107300681A (en) | 2017-04-28 | 2017-04-28 | A kind of multi-channel measurement circuit design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710320349.7A CN107300681A (en) | 2017-04-28 | 2017-04-28 | A kind of multi-channel measurement circuit design |
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| Publication Number | Publication Date |
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| CN107300681A true CN107300681A (en) | 2017-10-27 |
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ID=60137203
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| CN201710320349.7A Pending CN107300681A (en) | 2017-04-28 | 2017-04-28 | A kind of multi-channel measurement circuit design |
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| CN102466788A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Universal meter calibration source |
| US20140022913A1 (en) * | 2012-07-17 | 2014-01-23 | Denso Corporation | Fault diagnosis device for multiplexer |
| CN102998646A (en) * | 2012-12-11 | 2013-03-27 | 北京确安科技股份有限公司 | Quick calibrating device of semiconductor direct current parameter measurement module group |
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