CN109213010A - A kind of relay multidiameter option switch circuit and test macro with priority - Google Patents
A kind of relay multidiameter option switch circuit and test macro with priority Download PDFInfo
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- CN109213010A CN109213010A CN201811013890.4A CN201811013890A CN109213010A CN 109213010 A CN109213010 A CN 109213010A CN 201811013890 A CN201811013890 A CN 201811013890A CN 109213010 A CN109213010 A CN 109213010A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Tests Of Electronic Circuits (AREA)
- Relay Circuits (AREA)
Abstract
The present invention relates to a kind of relay multidiameter option switch circuit and test macro with priority, belongs to automatization testing technique field, solves the problems, such as existing switching circuit because of test result inaccuracy caused by influencing between relay.A kind of relay multidiameter option switch circuit with priority, the circuit includes n relay, wherein the measured signal of the road m is connect with the normally opened contact of m-th of relay；The intermediate contact of m-th of relay is connect with the normally-closed contact of the m+1 relay, wherein 1≤m < n, and m is integer；N-th tunnel measured signal is connect with the normally opened contact of n-th of relay；The normally-closed contact of 1st relay is hanging；The intermediate contact connecting test instrument of n-th of relay.The switching circuit that the present invention designs ensure that the priority orders of selection measured signal from hardware, and in the case where multicircuit relay is attracted, can only select the measured signal of highest priority, and isolation is realized between measured signal.
Description
Technical field
The present invention relates to automatization testing technique fields more particularly to a kind of relay multi-path choice with priority to open
Powered-down road and test macro.
Background technique
In automatic test field, multichannel measured signal is measured, multidiameter option switch has very extensive use,
Design cost can be substantially reduced and save system resource.When measured signal is differential signal, selected according to general multichannel
Switch is selected, by force altogether by multichannel measured signal, can not only make to generate interference between signal, so that measurement error increases, can also
Influence measurand normal function.In this case, the multidiameter option switch circuit being made of relay has answers well
With scene, the isolation between multichannel measured signal may be implemented.
Currently, the multidiameter option switch being made of relay, which is used, is connected to the normally opened of corresponding relay for multichannel measured signal
The intermediate contact of all relays is connected in parallel, as shown in Figure 1 by contact.C1, C2 be K1 relay normally-closed contact, O1,
O2 is the normally opened contact of K1 relay, and M1, M2 are the intermediate contact of K1 relay, and K2 ... Kn relay contact is defined with such
It pushes away.To give certain road measured signal to test resource, need to be attracted corresponding relay, to reach the mesh of multiple signals selection
's.
Such scheme is simple, and but there are the following problems, can only have a relay to be attracted in moment circuit a certain first, if
The case where being attracted simultaneously because of the drop-ins two or more relay such as hardware fault will make multichannel measured signal in parallel, influence to survey
Test result, and measurand is affected；Secondly, needing to fully consider during multidiameter option switch switches over
Relay turns off back contact release time, if under all the way relay be attracted, and preceding relay contact all the way does not discharge also, meeting
Keep measured signal in parallel；Again, if normally opened contact adhesion fault occurs in certain road relay, also can after relay all the way under actuation
By measured signal parallel connection；Finally, being needed in testing system software if there are certain priority orders to measured signal selection
Control logic is added, increases software programming difficulty.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of relay multidiameter option switch circuit with priority and
Test macro, to solve the problems, such as existing switching circuit because of test result inaccuracy caused by influencing between relay.
The purpose of the present invention is mainly achieved through the following technical solutions:
In the first embodiment of the present invention, a kind of relay multidiameter option switch circuit with priority is provided,
The circuit includes n relay,
Wherein, the measured signal of the road m is connect with the normally opened contact of m-th of relay；The intermediate contact of m-th of relay with
The normally-closed contact connection of the m+1 relay, wherein 1≤m < n, and m is integer；
N-th tunnel measured signal is connect with the normally opened contact of n-th of relay；
The normally-closed contact of 1st relay is hanging；
The intermediate contact connecting test instrument of n-th of relay.
The present invention has the beneficial effect that: the present invention improves and optimizates current relay multidiameter option switch circuit,
While realizing measured signal selection, it ensure that and be attracted even if multicircuit relay, the situation of measured signal parallel connection will not occur,
Test accuracy is improved, the safety of measurand is protected.The measured signal of selection has priority orders, and need not consider
Relay actuation time reduces software programming difficulty in automatization test system.
On the basis of above scheme, the present invention has also done following improvement:
Further, the relay include at least 2 pairs of contacts, each pair of contact include a normally opened contact, one it is normally closed
Contact and an intermediate contact,
Wherein, the anode of the road m measured signal is connect with the first normally opened contact of m-th of relay；M-th relay
First intermediate contact is connect with the first normally-closed contact of the m+1 relay；
Wherein, the cathode of the road m measured signal is connect with the second normally opened contact of m-th of relay；M-th relay
Second intermediate contact is connect with the second normally-closed contact of the m+1 relay.
Beneficial effect using above-mentioned further scheme is: the company by the way that measured signal positive and negative anodes and relay contact are arranged
Relationship is connect, so that the connection relationship of switching circuit is more clear, avoids the hardware fault as caused by circuit connecting relation confusion.
Further, the first normally-closed contact of the 1st relay, the second normally-closed contact are hanging；
The anode of n-th tunnel measured signal is connect with the first normally opened contact of n-th of relay；N-th tunnel measured signal is born
Pole is connect with the second normally opened contact of n-th of relay；
The electrode input end of first intermediate contact connecting test instrument of n-th of relay；In the second of n-th of relay
Between contact connecting test instrument negative input.
Beneficial effect using above-mentioned further scheme is: passing through the 1st road of setting and the n-th road signal and relay, test
The connection relationship of instrument, so that the connection relationship of switching circuit is more clear.
Further, the relay includes power-up control terminal, and the power-up control terminal cathode of the n relay is grounded,
When selecting any road measured signal to be used to test, the corresponding relay power-up control terminal anode of the road measured signal connects high electricity
Flat, the corresponding relay power-up control terminal anode of other each road measured signals connects low level.
Beneficial effect using above-mentioned further scheme is: control terminal is powered on by setting, when specifying the conducting of relay
It is powered on the low and high level situation of control terminal, the height of power-up control terminal is set according to actual needs convenient for those skilled in the art
Level.
Further, the relay includes power-up control terminal, and the power-up control terminal anode of the n relay connects high electricity
It is flat, when selecting any road measured signal to be used to test, the corresponding relay power-up control terminal cathode ground connection of the road measured signal,
The corresponding relay power-up control terminal anode of other each road measured signals connects high level.
Beneficial effect using above-mentioned further scheme is: the present invention also provides another sides that power-up control terminal is arranged
Method specifies the low and high level situation that control terminal is powered on when the conducting of relay, convenient for those skilled in the art according to practical need
The low and high level of power-up control terminal is set, provides multiple choices for those skilled in the art.
Further, in the measured signal of the road n, the priority of measured signal is incremented by successively from 1 to n.
Beneficial effect using above-mentioned further scheme is: switching circuit provided by the invention ensure that selection from hardware
The priority orders of measured signal, in the case where multicircuit relay is attracted, the only measured signal of selection highest priority, and by
Surveying between signal realizes isolation.
In another embodiment of the invention, a kind of automatization test system is provided, comprising: control module, signal tune
Manage switching circuit, test equipment described in module, first embodiment of the invention；The measured signal of the road n is sequentially connected to described open
Powered-down road,
When the control module selects the i-th tunnel measured signal for exporting corresponding control by the control module when testing
Signal processed, the control signal are input to the switching circuit after signal conditioning module, control the switching circuit output i-th
Road measured signal, and the measured signal is input to test equipment, wherein 1≤i≤n, and i is integer.
The present invention has the beneficial effect that: automatization test system provided by the invention has selected to open described in first embodiment
Powered-down road, so the multichannel measured signal that automatic test of the invention is tested has priority, it is not in measured signal
Situation in parallel, improves test accuracy, protects the safety of measurand.And it ensure that automatization test system on the whole
Stability and test result accuracy.
On the basis of above scheme, the present invention has also done following improvement:
Further, when the structure of switching circuit are as follows: the relay includes power-up control terminal, and the n relay adds
Electric control end cathode is grounded, and when selecting any road measured signal to be used to test, which adds
Electric control rectifies pole and connects high level, and the corresponding relay power-up control terminal anode of other each road measured signals connects low level, described
Signal is controlled after signal conditioning module improves, the i-th tunnel of output is high level, remaining relay is low level signal, and will
I-th tunnel is high level, remaining relay be low level signal be input to the switching circuit relay power-up control
Rectify pole, so that i-th of relay in the switching circuit is closed, exports the i-th tunnel measured signal.
Beneficial effect using above-mentioned further scheme is: the difference of switching circuit structure directly results in control signal not
Together, automatization test system of the invention controls signal according to the structure setting of switching circuit, and the consistency of test is effectively ensured
And accuracy.
Further, when the structure of switching circuit are as follows: the relay includes power-up control terminal, and the n relay adds
Electric control, which is rectified, extremely connects high level, when selecting any road measured signal to be used to test, the corresponding relay of road measured signal
Device is powered on control terminal cathode ground connection, and the corresponding relay power-up control terminal anode of other each road measured signals connects high level；It is described
Signal is controlled after the conditioning of information conditioning module, the i-th tunnel of output is low level, the signal that remaining relay is high level, and is incited somebody to action
The signal that i-th tunnel is low level, remaining relay is high level is input to the power-up control of the switching circuit relay
Cathode is held, so that i-th of relay in the switching circuit is closed, exports the i-th tunnel measured signal.
Beneficial effect using above-mentioned further scheme is: the difference of switching circuit structure directly results in control signal not
Together, automatization test system of the invention controls signal according to the structure setting of switching circuit, and the consistency of test is effectively ensured
And accuracy.
Further, the test equipment receives the measured signal, and test result is fed back to control module, completes the
The test of the road i measured signal.
Beneficial effect using above-mentioned further scheme is: test equipment is handled it after receiving measured signal, and
Test result is fed back into control module, is compared and analyzed convenient for control module according to measured signal and test result.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can by specification, claims with
And it is achieved and obtained in specifically noted content in attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is conventional relays multidiameter option switch circuit；
Fig. 2 is the relay multidiameter option switch circuit in the present invention with priority；
Fig. 3 is automatization test system schematic diagram provided by the invention.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
In the first embodiment of the present invention, a kind of relay multidiameter option switch circuit with priority is disclosed,
The circuit includes n relay,
Wherein, the measured signal of the road m is connect with the normally opened contact of m-th of relay；The intermediate contact of m-th of relay with
The normally-closed contact connection of the m+1 relay, wherein 1≤m < n, and m is integer；
N-th tunnel measured signal is connect with the normally opened contact of n-th of relay；
The normally-closed contact of 1st relay is hanging；
The intermediate contact connecting test instrument of n-th of relay.
The present invention has the beneficial effect that: the present invention improves and optimizates current relay multidiameter option switch circuit,
The colleague for realizing measured signal selection ensure that and be attracted even if multicircuit relay, measured signal parallel connection situation will not occurs, mention
High test accuracy, protects the safety of measurand.The measured signal of selection has priority orders, and need not consider after
Electric appliance actuation time reduces software programming difficulty in automatization test system.
Preferably, the relay include at least 2 pairs of contacts, each pair of contact include a normally opened contact, one it is normally closed
Contact and an intermediate contact,
Wherein, the anode of the road m measured signal is connect with the first normally opened contact of m-th of relay；M-th relay
First intermediate contact is connect with the first normally-closed contact of the m+1 relay；
Wherein, the cathode of the road m measured signal is connect with the second normally opened contact of m-th of relay；M-th relay
Second intermediate contact is connect with the second normally-closed contact of the m+1 relay.
By the way that the connection relationship of measured signal positive and negative anodes and relay contact is arranged, so that the connection relationship of switching circuit is more
It is clear to add, and avoids the hardware fault as caused by circuit connecting relation confusion.
Preferably, the first normally-closed contact of the 1st relay, the second normally-closed contact are hanging；
The anode of n-th tunnel measured signal is connect with the first normally opened contact of n-th of relay；N-th tunnel measured signal is born
Pole is connect with the second normally opened contact of n-th of relay；
The electrode input end of first intermediate contact connecting test instrument of n-th of relay；In the second of n-th of relay
Between contact connecting test instrument negative input.
By the connection relationship on the 1st road of setting and the n-th road signal and relay, test equipment, so that the company of switching circuit
The relationship of connecing is more clear.
The total n relay of Kn as shown in Fig. 2, a kind of relay multidiameter option switch circuit with priority is by K1, K2 ...
Device composition.Measured signal connects on normally opened contact O1, O2 of relay, and intermediate contact M1, M2 of relay are connected to down all the way
On normally-closed contact C1, C2 of relay, the intermediate contact of relay Kn is connected to test equipment.
To selection, wherein for measured signal m (1≤m≤n) to test equipment, computer system exports control signal all the way,
By the power-up control terminal A1 of high level output to relay Km after signal condition, low level output to other relays is powered on
Control terminal A1, measured signal m pass sequentially through the normally-closed contact of subsequent relay (K (m+1), K (m+2) ... Kn), finally send to survey
Test instrument.
This multidiameter option switch circuit ensure that can only have measured signal all the way to send to test equipment from hardware, even if having
Two or more relays are attracted, and will not generate multichannel measured signal parallel connection situation.It is same in K1, K2 relay in Fig. 2
When be attracted, in the case that other relays are not attracted, measured signal 1 is exported by M1, M2 of relay K1 to relay K2's
M1, M2 that relay Kn is eventually passed through to C1, C2 of relay K3 are sent in C1, C2, measured signal 2 by M1, M2 of relay K2
It send to test equipment.And such multidiameter option switch circuit makes measured signal selection have certain priority orders, preferentially
Grade sequence is followed successively by measured signal N, measured signal N-1 ... measured signal 1 from high to low.Even if there is multicircuit relay while inhaling
The case where conjunction, the measured signal of highest priority is also only selected, and realizes isolation between measured signal.
The power-up controller of relay may include following two set-up mode according to actual switch circuit:
1) relay includes power-up control terminal, and the power-up control terminal cathode of the n relay is grounded, and works as selection
When any road measured signal is used to test, the corresponding relay power-up control terminal anode of the road measured signal connects high level, other
The corresponding relay power-up control terminal anode of each road measured signal connects low level；
2) relay includes power-up control terminal, and the power-up control terminal anode of the n relay connects high level, when
When any road measured signal being selected to be used to test, the corresponding relay power-up control terminal cathode ground connection of the road measured signal, other
The corresponding relay power-up control terminal anode of each road measured signal connects high level.
It is powered on control terminal by setting, the low and high level situation for being powered on control terminal when the conducting of relay is specified, convenient for this
The low and high level that power-up control terminal is arranged in the technical staff in field according to actual needs provides more for those skilled in the art
Kind selection.
Further, in the measured signal of the road n, the priority of measured signal is incremented by successively from 1 to n.
Beneficial effect using above-mentioned further scheme is: switching circuit provided by the invention ensure that selection from hardware
The priority orders of measured signal, in the case where multicircuit relay is attracted, the only measured signal of selection highest priority, and by
Surveying between signal realizes isolation.
In another embodiment of the invention, a kind of automatization test system is provided, as shown in Figure 3, comprising: control mould
Block, signal conditioning module, switching circuit, test equipment described in first embodiment of the invention；The measured signal of the road n is sequentially connected
The extremely switching circuit,
When the control module selects the i-th tunnel measured signal for exporting corresponding control by the control module when testing
Signal processed, the control signal are input to the switching circuit after signal conditioning module, control the switching circuit output i-th
Road measured signal, and the measured signal is input to test equipment, wherein 1≤i≤n, and i is integer.
Automatization test system provided by the invention has selected switching circuit described in first embodiment, so of the invention
The multichannel measured signal that automatic test is tested has priority, is not in measured signal parallel connection situation, improves test
Accuracy protects the safety of measurand.And it ensure that the stability and test result of automatization test system on the whole
Accuracy.
The difference of switching circuit structure directly results in the difference of control signal, and automatization test system of the invention is according to opening
The structure setting on powered-down road controls signal, and the consistency and accuracy of test is effectively ensured.According to the difference of switching circuit, automatically
The selection for changing test macro control signal includes at least following two situation:
1) when the structure of switching circuit are as follows: the relay includes power-up control terminal, the power-up control of the n relay
End cathode is grounded, when selecting any road measured signal to be used to test, the corresponding relay power-up control of the road measured signal
Proper pole connects high level, and the corresponding relay power-up control terminal anode of other each road measured signals connects low level, and the control is believed
Number after signal conditioning module improves, the i-th tunnel of output is high level, remaining relay is low level signal, and by described i-th
Road is high level, remaining relay is power-up control terminal anode that low level signal is input to the switching circuit relay,
So that i-th of relay in the switching circuit is closed, the i-th tunnel measured signal is exported；
2) when the structure of switching circuit are as follows: the relay includes power-up control terminal, the power-up control of the n relay
Rectify and extremely connects high level, when selecting any road measured signal to be used to test, the corresponding relay power-up of the road measured signal
Control terminal cathode ground connection, the corresponding relay power-up control terminal anode of other each road measured signals connect high level；The control letter
Number after the conditioning of information conditioning module, the i-th tunnel of output is low level, the signal that remaining relay is high level, and by described i-th
The signal that road is low level, remaining relay is high level is input to the power-up control terminal cathode of the switching circuit relay,
So that i-th of relay in the switching circuit is closed, the i-th tunnel measured signal is exported.
The test equipment receives the measured signal, and test result is fed back to control module, and it is tested to complete the i-th road
The test of signal.
Test equipment is handled it after receiving measured signal, and test result is fed back to control module, convenient for control
Molding root tuber is compared and analyzed according to measured signal and test result.
It will be understood by those skilled in the art that realizing all or part of the process of above-described embodiment method, meter can be passed through
Calculation machine program is completed to instruct relevant hardware, and the program can be stored in computer readable storage medium.Wherein, institute
Stating computer readable storage medium is disk, CD, read-only memory or random access memory etc..
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of relay multidiameter option switch circuit with priority, which is characterized in that the circuit includes n relay
Device,
Wherein, the measured signal of the road m is connect with the normally opened contact of m-th of relay；The intermediate contact and m+ of m-th of relay
The normally-closed contact connection of 1 relay, wherein 1≤m < n, and m is integer；
N-th tunnel measured signal is connect with the normally opened contact of n-th of relay；
The normally-closed contact of 1st relay is hanging；
The intermediate contact connecting test instrument of n-th of relay.
2. the relay multidiameter option switch circuit according to claim 1 with priority, which is characterized in that it is described after
Electric appliance includes at least 2 pairs of contacts, and each pair of contact includes a normally opened contact, a normally-closed contact and an intermediate contact,
Wherein, the anode of the road m measured signal is connect with the first normally opened contact of m-th of relay；The first of m-th of relay
Intermediate contact is connect with the first normally-closed contact of the m+1 relay；
Wherein, the cathode of the road m measured signal is connect with the second normally opened contact of m-th of relay；The second of m-th of relay
Intermediate contact is connect with the second normally-closed contact of the m+1 relay.
3. the relay multidiameter option switch circuit according to claim 2 with priority, which is characterized in that
The first normally-closed contact, the second normally-closed contact of 1st relay are hanging；
The anode of n-th tunnel measured signal is connect with the first normally opened contact of n-th of relay；The cathode of n-th tunnel measured signal with
The second normally opened contact connection of n-th of relay；
The electrode input end of first intermediate contact connecting test instrument of n-th of relay；Touching among the second of n-th of relay
The negative input of point connecting test instrument.
4. the relay multidiameter option switch circuit according to any one of claim 1-3 with priority, feature
It is, the relay includes power-up control terminal,
The power-up control terminal cathode of the n relay is grounded, when selecting any road measured signal to be used to test, the road quilt
It surveys signal corresponding relay power-up control terminal anode and connects high level, the corresponding relay power-up control of other each road measured signals
Proper pole connects low level.
5. the relay multidiameter option switch circuit according to any one of claim 1-3 with priority, feature
It is, the relay includes power-up control terminal,
The power-up control terminal anode of the n relay connects high level, should when selecting any road measured signal to be used to test
Road measured signal corresponding relay power-up control terminal cathode ground connection, the corresponding relay power-up control of other each road measured signals
Proper pole connects high level.
6. the relay multidiameter option switch circuit according to claim 4 or 5 with priority, which is characterized in that institute
It states in the measured signal of the road n, the priority of measured signal is incremented by successively from 1 to n.
7. a kind of automatization test system characterized by comprising control module, signal conditioning module, in claim 1-6
Described in any item switching circuits, test equipment；The measured signal of the road n is sequentially connected to the switching circuit,
When the control module selects the i-th tunnel measured signal for exporting corresponding control letter by the control module when testing
Number, the control signal is input to the switching circuit after signal conditioning module, controls the switching circuit and exports the i-th road quilt
Signal is surveyed, and the measured signal is input to test equipment, wherein 1≤i≤n, and i is integer.
8. automatization test system according to claim 7, which is characterized in that when switching circuit is described in claim 4
Switching circuit when, the control signal after signal conditioning module improves, output the i-th tunnel be high level, remaining relay is
Low level signal, and by i-th tunnel be high level, remaining relay is that low level signal is input to the switching circuit
The power-up control terminal anode of relay exports the i-th tunnel measured signal so that i-th of relay in the switching circuit is closed.
9. automatization test system according to claim 7, which is characterized in that when switching circuit is described in claim 5
Switching circuit when, the control signal through information conditioning module conditioning after, output the i-th tunnel be low level, remaining relay is
The signal of high level, and i-th tunnel is low level, the signal that remaining relay is high level is input to the switching circuit
The power-up control terminal cathode of relay exports the i-th tunnel measured signal so that i-th of relay in the switching circuit is closed.
10. the automatization test system according to any one of claim 7-9, which is characterized in that the test equipment connects
The measured signal is received, and test result is fed back into control module, completes the test of the i-th tunnel measured signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013890.4A CN109213010B (en) | 2018-08-31 | 2018-08-31 | Relay multi-path selection switch circuit with priority and test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811013890.4A CN109213010B (en) | 2018-08-31 | 2018-08-31 | Relay multi-path selection switch circuit with priority and test system |
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| CN109213010A true CN109213010A (en) | 2019-01-15 |
| CN109213010B CN109213010B (en) | 2019-12-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110032107A (en) * | 2019-04-16 | 2019-07-19 | 南通大学 | The flogic system and control method of 4 road signal on-off are controlled by 3 relays |
| CN112379251A (en) * | 2020-10-30 | 2021-02-19 | 北京航天光华电子技术有限公司 | Relay circuit fault testing system and method |
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| CN109213010B (en) | 2019-12-06 |
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