CN209014675U - A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string - Google Patents
A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string Download PDFInfo
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- CN209014675U CN209014675U CN201821591342.5U CN201821591342U CN209014675U CN 209014675 U CN209014675 U CN 209014675U CN 201821591342 U CN201821591342 U CN 201821591342U CN 209014675 U CN209014675 U CN 209014675U
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Abstract
A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string, it is made of the short-circuit automatic detection circuit of the identical broken string of four groups of structures, in every group of broken string short circuit automatic detection circuit, input terminal one end is connect with four terminal potential devices, the input terminal other end is connect with potentiometer power supply circuit, potentiometer power supply circuit is connect with amplifier, A/D sample circuit, A/D sample circuit is connect with A/D sampling control circuit, A/D sampling control circuit is connect with test voltage generator, test voltage generator is connect with potentiometer power supply circuit, and amplifier is connect with output end；Pass through setting test voltage generator and A/D sample circuit, for detecting the broken string situation of whole leads of four terminal potential devices automatically, it short cut with each other situation between also detectable lead, and will test result and report A/D sampling control circuit, have the characteristics that the comprehensive, real-time of detection, high reliablity, practical.
Description
Technical field
The utility model relates to automatic measurement technique field, more particularly to a kind of four terminal potential device signals broken string short circuit are automatic
Detection circuit.
Background technique
Use four terminal potential devices many as the control circuit of sensor, the control circuit such as in rotational angle signal processing
In, and the design method in more potentiometer channels, more redundancies is generallyd use in the control circuit of rotational angle signal processing, therefore
Potentiometer lead certainly will increase, and potentiometer signal need to be drawn by plug, lead, unavoidably be also easy to produce wire contacts not
The failures such as good, broken string and short circuit.
To find such failure problems such as bad wire contacts, broken string and short circuit in time, develops one kind and solve the above problems
Device have become those skilled in the art's technical problem urgently to be resolved.
Utility model content
The technical issues of the utility model is solved is to provide a kind of automatic detection of four terminal potential device signals broken string short circuit
Circuit, to solve the disadvantage in above-mentioned background technique.
The technical problem solved by the utility model is implemented by the following technical solutions:
A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string, by the identical automatic inspection of broken string short circuit of four groups of structures
Slowdown monitoring circuit composition, every group of broken string short circuit automatic detection circuit includes input, output end, potentiometer power supply circuit, amplifier, survey
Examination voltage generator, A/D sampling control circuit and A/D sample circuit, input terminal one end are connect with four terminal potential devices, and input terminal is another
One end is connect with potentiometer power supply circuit, and potentiometer power supply circuit is connect with amplifier, A/D sample circuit, A/D sample circuit with
The connection of A/D sampling control circuit, A/D sampling control circuit are connect with test voltage generator, test voltage generator and current potential
The connection of device power supply circuit, amplifier are connect with output end, and input terminal includes first lead~third lead, ground line, amplifier
Including the first amplifier；Specific structure is as follows:
First lead is connect with A/D sample circuit, the first capacitor of potentiometer power supply circuit and the 5th resistance respectively；
Second lead respectively with A/D sample circuit, the second resistance of test voltage generator and 3rd resistor, amplifier
One end of 6th resistance connects；
Third lead is connect with A/D sample circuit, the second capacitor of potentiometer power supply circuit and the 7th resistance respectively；
Tenth resistance of amplifier is connect with A/D sample circuit, the 7th capacitor, output end respectively, the 7th capacitor other end
It is connected with ground line；Test voltage generator is connect by the 4th resistance with A/D sampling control circuit.
In the present invention, isolation circuit is provided between A/D sampling control circuit and the 4th resistance；It is adopted in A/D
Isolation circuit is provided between sample control circuit and A/D sample circuit.
In the present invention, test voltage generator includes first resistor~the 4th resistance, the first triode, the two or two
One end of pole pipe, second resistance is connect with 3rd resistor, and the other end of second resistance and ground line connect, 3rd resistor it is another
End connect with second diode one end, the second diode other end is connect with first triode one end, the first triode it is another
End is connect with the 4th resistance, and the first triode is also in parallel with first resistor.
In the present invention, potentiometer power supply circuit includes the 5th resistance, the 7th resistance, first capacitor, the second capacitor,
The connection of one end of 5th resistance and first capacitor, the other end and ground line of first capacitor connect；7th resistance and the second capacitor
One end connection, the other end of the second capacitor and ground line connect.
In the present invention, amplifier further includes the 6th resistance, the 8th resistance~the tenth resistance, third capacitor, the 4th
Capacitor, the first amplifier are connect with one end of the 6th resistance, the 9th resistance, the tenth resistance, third capacitor, the 4th capacitor respectively, the
One amplifier is also connected with the 8th resistor coupled in parallel, the other end of the 9th resistance and ground line, the other end and ground line of third capacitor
Connection, the other end and ground line of the 4th capacitor connect.
In the present invention, A/D sample circuit by sampling integrated circuit, the 5th capacitor, the 6th capacitor, the 8th capacitor,
9th capacitor~the 14th capacitor, eleventh resistor, voltage-stablizer composition.
The utility model has the advantages that the utility model is made of the short-circuit automatic detection circuit of the identical broken string of four groups of structures, pass through setting
Test voltage generator and A/D sample circuit, the broken string situation of whole leads for detecting four terminal potential devices automatically can also be examined
Surveying between lead short cut with each other situation, and will test result and reports A/D sampling control circuit, have detect comprehensive, real-time,
High reliablity, practical feature.
Detailed description of the invention
Fig. 1 is the functional block diagram of the preferred embodiment of the utility model.
Fig. 2 is the circuit block diagram of the preferred embodiment of the utility model.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under
Face combines and is specifically illustrating, and the utility model is further described.
It is identical disconnected by four groups of structures referring to the short-circuit automatic detection circuit of four terminal potential device signal of one kind broken string of Fig. 1~2
Line short circuit automatic detection circuit composition, every group of broken string short circuit automatic detection circuit includes input terminal Input1, output end
Output1, potentiometer power supply circuit Circuit I, amplifier Amplifier, test voltage generator BIT Online, A/D
Sampling control circuit A/D and level control, A/D sample circuit, ground line P1GND, the first triode V1, the two or two
Pole pipe V2, first resistor R1~eleventh resistor R11, the capacitor C14 of first capacitor C1~the 14th, the sampling of the first amplifier N1, A/D
Integrated circuit N2, voltage-stablizer N3 and isolation circuit Isolated Circuit, the one end input terminal Input1 and four terminal potential devices connect
Connect, the input terminal Input1 other end is connect with potentiometer power supply circuit Circuit I, potentiometer power supply circuit Circuit I with
The connection of amplifier Amplifier, A/D sample circuit, A/D sample circuit and A/D sampling control circuit A/D and level
Control connection, A/D sampling control circuit A/D and level control and test voltage generator BIT Online connect
Connect, test voltage generator BIT Online is connect with potentiometer power supply circuit Circuit I, amplifier Amplifier with it is defeated
Outlet Output1 connection, input terminal Input1 include first lead P1-R1~third lead P1-R3, ground line P1GND, amplification
Device Amplifier includes the first amplifier N1；
Wherein, the first lead P1-R1 first capacitor with A/D sample circuit, potentiometer power supply circuit Circuit I respectively
C1 and the 5th resistance R5 connection；
Second lead P1-R2 respectively with A/D sample circuit, test voltage generator BIT Online second resistance R2 and
One end of the 6th resistance R6 of 3rd resistor R3, amplifier Amplifier connect；
Third lead P1-R3 respectively with A/D sample circuit, potentiometer power supply circuit Circuit I the second capacitor C2 and
7th resistance R7 connection；
The tenth resistance R10 of amplifier Amplifier respectively with A/D sample circuit, the 7th capacitor C7, output end
Output1 connection, the 7th capacitor C7 other end and ground line connect；Test voltage generator BIT Online passes through the 4th resistance
R4 is connect with A/D sampling control circuit A/D and level control；
Isolation circuit is provided between A/D sampling control circuit A/D and level control and the 4th resistance R4
Isolated Circuit；In the control terminal of A/D sampling control circuit A/D and level control and A/D sample circuit
Between be provided with isolation circuit Isolated Circuit；
Test voltage generator BIT Online includes the resistance R4 of first resistor R1~the 4th, the first triode V1, second
One end of diode V2, second resistance R2 are connect with 3rd resistor R3, and the other end and ground line of second resistance R2 connects, third
The other end of resistance R3 is connect with second one end diode V2, and the second diode V2 other end and first one end triode V1 connect
It connects, the other end of the first triode V1 is connect with the 4th resistance R4, and the first triode V1 is also in parallel with first resistor R1；
Potentiometer power supply circuit Circuit I includes the 5th resistance R5, the 7th resistance R7, first capacitor C1, the second capacitor
C2, the 5th resistance R5 are connect with one end of first capacitor C1, and the other end and ground line of first capacitor C1 connects；7th resistance R7
It is connect with one end of the second capacitor C2, the other end and ground line of the second capacitor C2 connects；
Amplifier Amplifier further includes the 6th resistance R6, ten resistance R10 of the 8th resistance R8 ~ the, third capacitor C3,
Four capacitor C4, the first amplifier N1 respectively with the 6th resistance R6, the 9th resistance R9, the tenth resistance R10, third capacitor C3, the 4th electricity
Holding one end connection of C4, the first amplifier N1 is also in parallel with the 8th resistance R8, and the other end and ground line of the 9th resistance R9 connects, the
The other end and ground line of three capacitor C3 connects, and the other end and ground line of the 4th capacitor C4 connects；
A/D sample circuit is by sampling integrated circuit N2, the 5th capacitor C5, the 6th capacitor C6, the 8th capacitor C8, the 9th capacitor
The capacitor C14 of C9 ~ the 14th, eleventh resistor R11, voltage-stablizer N3 composition are set by the typical application circuit of A/D sampling integrated circuit
Meter.
Working principle
As shown in Fig. 2, four terminal potential device resistance values are 2K Ω, as the first lead P1-R1 and ground line of four terminal potential devices
When P1GND is normal, UP1-R1<9V；As only first lead P1-R1 disconnection, U P1-R1Thus=9V judges that first lead P1-R1 is disconnected
It opens；Similarly, judge that third lead P1-R3 is disconnected；
Real time on-line monitoring Uoutput1Voltage records Uoutput1Voltage value enables the first triode V1 be connected, and+5V voltage is through the
Amplifier is added in two diode V2,3rd resistor R2,3rd resistor R3, because 3rd resistor R3 resistance value is very big (120K Ω), if the
Two lead P1-R2 are not disconnected, then because the second lead P1-R2 terminal earth impedance is smaller ,+5V the voltage of application is in the second lead
P1-R2 is upper to be dragged down by partial pressure, i.e. U after application+5V voltageP1-R2Variation < 0.1V, at this time Uoutput1Voltage value maintains initial value constant
(variation < 0.1V), judgment method are as follows: the U of the first triode V1 conducting front and backoutput1Voltage value remain unchanged (variation <
0.1V), then judge that the second lead P1-R2 is not disconnected, if the U of the first triode V1 conducting front and backoutput1Voltage value variation 0.2V ~
0.3V then judges that the second lead P1-R2 is disconnected；
Even if being grounded P1GND to disconnect, circuit still can be worked normally, unaffected, and being only possible to circuit zero-bit has less
Amount variation, therefore need not judge to be grounded whether P1GND disconnects；
Same method infers whether each lead has short-circuit conditions.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (7)
- The short-circuit automatic detection circuit 1. a kind of four terminal potential device signals break, which is characterized in that by the identical broken string of four groups of structures Short-circuit automatic detection circuit composition, every group of broken string short circuit automatic detection circuit include input, output end, potentiometer power supply electricity Road, amplifier, test voltage generator, A/D sampling control circuit and A/D sample circuit, input terminal one end and four terminal potential devices Connection, the input terminal other end are connect with potentiometer power supply circuit, and potentiometer power supply circuit is connect with amplifier, A/D sample circuit, A/D sample circuit is connect with A/D sampling control circuit, and A/D sampling control circuit is connect with test voltage generator, test voltage Generator is connect with potentiometer power supply circuit, and amplifier is connect with output end, and input terminal includes first lead~third lead, connects Ground wire, amplifier include the first amplifier；Specific structure is as follows:First lead is connect with A/D sample circuit, the first capacitor of potentiometer power supply circuit and the 5th resistance respectively；Second lead respectively with A/D sample circuit, the second resistance of test voltage generator and 3rd resistor, amplifier the 6th One end of resistance connects；Third lead is connect with A/D sample circuit, the second capacitor of potentiometer power supply circuit and the 7th resistance respectively；Tenth resistance of amplifier is connect with A/D sample circuit, the 7th capacitor, output end respectively, the 7th capacitor other end with connect Ground wire connection；Test voltage generator is connect by the 4th resistance with A/D sampling control circuit.
- The short-circuit automatic detection circuit 2. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that Isolation circuit is provided between A/D sampling control circuit and the 4th resistance.
- The short-circuit automatic detection circuit 3. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that Isolation circuit is provided between A/D sampling control circuit and A/D sample circuit.
- The short-circuit automatic detection circuit 4. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that survey Examination voltage generator includes first resistor~the 4th resistance, the first triode, the second diode, one end of second resistance and third Resistance connection, the other end and ground line of second resistance connect, and the other end of 3rd resistor is connect with second diode one end, the The two diode other ends are connect with first triode one end, and the other end of the first triode is connect with the 4th resistance, the one or three pole It manages also in parallel with first resistor.
- The short-circuit automatic detection circuit 5. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that electricity Position device power supply circuit includes the 5th resistance, the 7th resistance, first capacitor, the second capacitor, one end of the 5th resistance and first capacitor Connection, the other end and ground line of first capacitor connect；7th resistance is connect with one end of the second capacitor, the second capacitor it is another End is connected with ground line.
- The short-circuit automatic detection circuit 6. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that put Big device further includes the 6th resistance, the 8th resistance~the tenth resistance, third capacitor, the 4th capacitor, and the first amplifier is electric with the 6th respectively Resistance, one end connection of the 9th resistance, the tenth resistance, third capacitor, the 4th capacitor, the first amplifier also with the 8th resistor coupled in parallel, the The other ends of nine resistance and ground line connect, and the other end and ground line of third capacitor connect, the other end of the 4th capacitor with connect Ground wire connection.
- The short-circuit automatic detection circuit 7. a kind of four terminal potentials device signal according to claim 1 breaks, which is characterized in that A/ D sample circuit is by sampling integrated circuit, the 5th capacitor, the 6th capacitor, the 8th capacitor, the 9th capacitor~the 14th capacitor, the tenth One resistance, voltage-stablizer composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821591342.5U CN209014675U (en) | 2018-09-28 | 2018-09-28 | A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821591342.5U CN209014675U (en) | 2018-09-28 | 2018-09-28 | A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string |
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| CN209014675U true CN209014675U (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821591342.5U Active CN209014675U (en) | 2018-09-28 | 2018-09-28 | A kind of short-circuit automatic detection circuit of four terminal potential device signals broken string |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061373A (en) * | 2018-09-28 | 2018-12-21 | 中国船舶重工集团公司第七0七研究所九江分部 | A kind of short-circuit automatic detection circuit device of four terminal potential device signals broken string |
-
2018
- 2018-09-28 CN CN201821591342.5U patent/CN209014675U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061373A (en) * | 2018-09-28 | 2018-12-21 | 中国船舶重工集团公司第七0七研究所九江分部 | A kind of short-circuit automatic detection circuit device of four terminal potential device signals broken string |
| CN109061373B (en) * | 2018-09-28 | 2024-02-13 | 中国船舶重工集团公司第七0七研究所九江分部 | Automatic detection circuit device for signal broken line and short circuit of four-terminal potentiometer |
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