CN109141495A - Sensor interface apparatus - Google Patents
Sensor interface apparatus Download PDFInfo
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- CN109141495A CN109141495A CN201810687181.8A CN201810687181A CN109141495A CN 109141495 A CN109141495 A CN 109141495A CN 201810687181 A CN201810687181 A CN 201810687181A CN 109141495 A CN109141495 A CN 109141495A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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Abstract
This application provides a kind of Sensor interface apparatus, comprising: first interface, second interface and third interface, the first interface, the second interface and the third interface are used to connect the pin of sensor；First power supply circuit is configured as powering to first interface；First detection circuit is configured as detecting the electric signal inputted from third interface；Second detection circuit is configured as detecting the electric signal inputted from first interface；Earthed circuit is configured as connecting with second interface.Sensor interface apparatus provided by the present application can realize that a Sensor interface apparatus supports multiple sensors without using switch, to reduce the manufacturing cost and maintenance cost of sensor.
Description
Technical field
This application involves circuit field more particularly to a kind of Sensor interface apparatus.
Background technique
In industrial system, sensor type is numerous, and specific sensor needs specific circuit to cooperate sensor
Access.Since the working principle of different types of sensor is different, the requirement of different types of sensor interface circuit
Also different, a kind of interface circuit is typically only capable to support a kind of sensor, but practical application scene often requires that sensor interface fills
Different types of sensor can be supported to detect a variety of physical quantitys by setting.
A solution is to design a kind of Sensor interface apparatus including multiple circuits, each in multiple circuit
Circuit is for accessing a kind of sensor, by the corresponding circuit of switching interface, supports different types of sensing to realize
Device.However, the program need in Sensor interface apparatus be added switch, increase Sensor interface apparatus manufacturing cost and
Therefore how maintenance cost realizes that a Sensor interface apparatus supports that multiple sensors are without using switch
The problem of current urgent need to resolve.
Summary of the invention
The application provides a kind of Sensor interface apparatus, by the way that multiple interfaces and multiple detection circuits, Ke Yi is arranged
Realize that a Sensor interface apparatus supports multiple sensors in the case where without using switch, to reduce the manufacture of sensor
Cost and maintenance cost.
In a first aspect, this application provides a kind of Sensor interface apparatus, comprising: first interface, second interface and third
Interface, the first interface, the second interface and the third interface are used to connect the pin of sensor；First power supply circuit is matched
It is set to first interface and powers；First detection circuit is configured as detecting the electric signal inputted from third interface；Second detection electricity
Road is configured as connecting by resistance (R1) with the first interface, and second detection circuit includes the second analog-digital converter
ADC, the second analog-digital converter ADC are used to detect the electric signal inputted from the first interface, described to connect from described first
The electric signal of mouth input includes the analog electrical signal of sensor input, or the analog telecommunications including first power supply circuit input
Number, or the analog electrical signal of the analog electrical signal including sensor input and first power supply circuit input, wherein when
When the analog electrical signal inputs the second analog-digital converter ADC by the first interface, second analog-digital converter
The analog electrical signal is changed into digital electric signal and is input to digital signal processing device by ADC；Earthed circuit, be configured as with
Second interface connection.
Sensor interface apparatus provided in this embodiment includes at least three interfaces, can be used for connecting the sensing of three pins
Device (for example, voltage transmitter) can be used for the sensor (for example, the imported sensor of dry contact) of two pins of connection, this
Outside, since the Sensor interface apparatus includes at least two detection circuits, it can be used for detecting the sensor of at least two types
Output signal, therefore, Sensor interface apparatus provided in this embodiment can without using switch in the case where realize one
Sensor interface apparatus supports multiple sensors, to reduce the manufacturing cost and maintenance cost of sensor.Further, since the
One power supply circuit and the second detection circuit are connect with first interface, and therefore, the second detection circuit can also detect the first power supply
The voltage or current of circuit improves sensor and surveys so as to accurately measure the voltage or electric current of the offer of the first power supply circuit
Measure the accuracy of result.
Optionally, the Sensor interface apparatus further include: the 4th interface, for connecting the pin of sensor；Second power supply
Circuit is configured as powering to the 4th interface.
When Sensor interface apparatus further includes the 4th interface and the second power supply circuit, which may be used also
It supports to need the work of four pin sensors (for example, Hall sensor) of two power supply circuits and an earthed circuit.
Optionally, the second power supply circuit includes: the second current-limiting protection circuit, is configured as the electricity of the first power supply circuit of limitation
Stream is less than or equal to the second electric current, which is the maximum current of sensor safe work.
Above scheme can to avoid the electric current because of the second power supply circuit it is excessive caused by sensor degradation.
Optionally, Sensor interface apparatus provided by the present application further include: the 4th interface, for connecting drawing for sensor
Foot；Third detection circuit is configured as detecting the electric signal inputted from the 4th interface, and/or, it is configured as described in detection
The voltage and or current of second power supply circuit.
By introducing the 4th interface and third detection circuit, Sensor interface apparatus can be supported to need a power supply circuit
With the work of four pin sensors (for example, dry contact output type sensor) of an earthed circuit.Further, since the second power supply
Circuit and third detection circuit are connect with the 4th interface, and therefore, third detection circuit can also detect the second power supply circuit
Voltage or current improves sensor measurement so as to accurately measure the voltage or electric current of the offer of the second power supply circuit
Accuracy.
Optionally, the second detection circuit is configured as detecting the electric signal inputted from second interface.
There may be errors between the virtual voltage and nominal voltage provided due to power supply circuit, alternatively, power supply circuit mentions
There may be errors between the actual current and nominal current of confession, therefore, configure the first power supply of detection for the second detection circuit
The voltage and or current of circuit can accurately measure the voltage and or current of the first power supply circuit, utilize the second detection circuit
The voltage and or current of the first power supply circuit measured determines the measurement result of sensor, can make the measurement knot of sensor
Fruit is more accurate.
Optionally, the first detection circuit includes: operational amplifier, is configured as amplifying the electricity inputted from the third interface
Signal.
The electric signal that sensor generates is usually weaker, and operational amplifier is configured in the first detection circuit can amplify sensing
The electric signal that device generates, so that the testing result of the first detection circuit is more accurate.
Optionally, the first detection circuit further include: the first clamp circuit is configured as the input electricity of limitation operational amplifier
Position is less than or equal to the first current potential, which is the maximum potential of operational amplifier trouble free service.
Above scheme can guarantee operational amplifier work in safe potential areas.
Optionally, the first detection circuit include: the first analog-digital converter (analog-to-digital converter,
ADC), it is configured as detecting the electric signal inputted from third interface；Second clamp circuit is configured as the defeated of the first ADC of limitation
Enter current potential less than or equal to the second current potential, the second current potential is the maximum potential of the first ADC trouble free service.
Above scheme can guarantee the first ADC work in safe potential areas.
Optionally, the first detection circuit includes: the first ADC, is configured as detecting the electric signal inputted from third interface；Partially
Potential circuit is set, is configured as providing compensation current potential to the first ADC.
The bias voltage that bias voltage circuit provides is used to provide compensation current potential to the first ADC, and the first detection circuit is connected.
Optionally, the first power supply circuit includes: the first current-limiting protection circuit, is configured as the electricity of the first power supply circuit of limitation
Stream is less than or equal to the first electric current, and the first electric current is the maximum current of sensor safe work.
The safety of Sensor interface apparatus can be improved in above scheme.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of Sensor interface apparatus provided by the present application；
Fig. 2 is a kind of schematic diagram of Sensor interface apparatus connection voltage transmitter provided by the present application；
Fig. 3 is a kind of schematic diagram of Sensor interface apparatus connection NTC sensor provided by the present application；
Fig. 4 is a kind of schematic diagram of Sensor interface apparatus connection imported sensor of dry contact provided by the present application；
Fig. 5 is the schematic diagram of another Sensor interface apparatus provided by the present application；
Fig. 6 is a kind of schematic diagram of Sensor interface apparatus connection Hall sensor provided by the present application；
Fig. 7 is a kind of schematic diagram of Sensor interface apparatus connection dry contact output type sensor provided by the present application；
Fig. 8 is the schematic diagram of another Sensor interface apparatus provided by the present application.
Specific embodiment
Below in conjunction with attached drawing, the technical solution in the application is described.
Fig. 1 is a kind of schematic diagram of Sensor interface apparatus provided by the present application.
As shown in Figure 1, Sensor interface apparatus 100 includes: interface 1, interface 2, interface 3, the first power supply circuit, the first inspection
Slowdown monitoring circuit, the second detection circuit and earthed circuit, wherein interface 1, interface 2 and interface 3 are used to connect the pin of sensor, the
One power supply circuit is configured as powering to interface 1, and the first detection circuit is configured as detecting the electric signal inputted from interface 3, the
Two detection circuits are configured as detecting the electric signal inputted from interface 1.
In addition to the above features, the application is not construed as limiting the other feature of Sensor interface apparatus 100, for example, connecing
Mouth 1, interface 2 and interface 3 can be pin (pin) interface, be also possible to other types of interface；What the first power supply circuit provided
Voltage can be+12V, be also possible to -12V, can also be the voltage of other numerical value；First detection circuit and the second detection circuit
It can be the detection circuit comprising ADC, for the ADC for detecting electric signal, the first detection circuit and the second detection circuit can be with
It is the detection circuit comprising other detection devices.
As an optional embodiment, Sensor interface apparatus 100 can connect voltage transmitter, and voltage transmitter is
It is a kind of to be converted into tested alternating voltage, DC voltage, pulse voltage to export DC voltage or DC current simultaneously by linear scale
The device of isolation output analog signal or digital signal.
As shown in Fig. 2, interface 1, interface 2 and interface 3 are distinguished when Sensor interface apparatus 100 connects voltage transmitter
Three pins of voltage transmitter are connected, the first power supply circuit (voltage of offer+12V) and earthed circuit are (that is, the second detection electricity
Road) unidirectional power supply outward, the electric signal (voltage) that the first detection circuit collection voltages transmitter generates, to support voltage transmission
Device completes measurement work.
Above-described embodiment is merely illustrative of, and Sensor interface apparatus 100 can be also used for connecting the biography of other three pins
Sensor.
For voltage transmitter, input voltage value is directly proportional to output voltage values, if the electricity that power supply circuit provides
Press unstable, then the output result of voltage transmitter will also change, if still calculating voltage according to nominal input voltage value
The input voltage value of transmitter, then calculated result and actual measured results will generate error.According to device shown in Fig. 2, first
Power supply circuit and the second detection circuit are connect with interface 1, and therefore, the second detection circuit can also detect the first power supply circuit
Voltage or current improves voltage transmitter measurement so as to accurately measure the voltage or electric current of the offer of the first power supply circuit
As a result accuracy.
As another optional embodiment, Sensor interface apparatus 100 can connect negative temperature coefficient (negative
Temperature coefficient, NTC) sensor.
As shown in figure 3, the interface 1 and interface 3 of Sensor interface apparatus 100 connect with two pins of NTC sensor respectively
It connects, interface 2 is vacant, wherein the voltage of the first power supply circuit offer -12V, the voltage of the first power supply circuit output is by the second detection
Circuit measuring, the first detection circuit detect the voltage of interface 3.When the temperature of NTC sensor measurement changes, NTC sensing
The resistance of device changes, and changes so as to cause the voltage at interface 3, and specific voltage value is surveyed by the first detection circuit
Amount can calculate the resistance value of NTC sensor by reading the voltage value that the first detection circuit and the second detection circuit measure, from
And derive the temperature of NTC sensor measurement.
Above-described embodiment is merely illustrative of, and Sensor interface apparatus 100 can be also used for connecting the biography of other two pins
Sensor.
Fig. 4 shows another schematic diagram that Sensor interface apparatus 100 provided by the present application connects two pins sensor.
As shown in figure 4, the interface 1 and interface 2 of Sensor interface apparatus 100 respectively with the imported sensor of dry contact two
A pin connection, interface 3 is vacant, and when the imported sensor dry contact of the dry contact disconnects, the second detection circuit is collected
Voltage is the voltage that the first power supply circuit provides；When the dry contact of the imported sensor of dry contact closure, the second detection electricity
The collected voltage in road changes, and therefore, can judge that dry contact is defeated by reading the voltage value that the second detection circuit measures
Enter the stem grafting dotted state of type sensor.
To sum up, Sensor interface apparatus 100 provided by the present application can support a variety of biographies without using switch
Sense device working, to reduce the manufacturing cost and maintenance cost of Sensor interface apparatus 100.
It should be noted that the Sensor interface apparatus 100 in above-described embodiment includes three jacks, but this Shen is not represented
The Sensor interface apparatus that please be provided only includes three jacks, and Sensor interface apparatus provided by the present application includes at least three slotting
Hole and other circuits.
Fig. 5 shows the schematic diagram of Sensor interface apparatus 200 provided by the present application.
As shown in figure 5, Sensor interface apparatus 200 include: interface 1, interface 2, interface 3, interface 4, the first power supply circuit,
First detection circuit, the second power supply circuit and third detection circuit, wherein interface 1, interface 2, interface 3 and interface 4 are for connecting
The pin of sensor, the first power supply circuit are configured as powering to interface 1, and the first detection circuit is configured as detection from interface 3
The electric signal of input, the second detection circuit are configured as detecting the electric signal inputted from interface 2, also, the second detection circuit quilt
It is configured to earthed circuit, the second power supply circuit is configured as powering to interface 4, and third detection circuit is configured as detection from interface
The electric signal of 4 inputs.
In addition to the above features, the application is not construed as limiting the other feature of Sensor interface apparatus 200, for example, connecing
Mouth 1, interface 2, interface 3 and interface 4 can be pin (pin) interface, be also possible to other types of interface；First power supply circuit
The voltage provided with the second power supply circuit can be+12V, is also possible to -12V, can also be the voltage of other numerical value；First inspection
Slowdown monitoring circuit, the second detection circuit and third detection circuit can be the detection circuit comprising ADC, which is used to detect electric signal,
First detection circuit, the second detection circuit and third detection circuit can also be the detection circuit comprising other detection devices.
It should be noted that Sensor interface apparatus 200 can only include in the second power supply circuit and third detection circuit
One.
Fig. 6 shows the schematic diagram that Sensor interface apparatus 200 provided by the present application connects Hall sensor.
Hall (Hall) sensor is to generate one around current-carrying conductor according to sensor made of Hall effect principle
It is proportional to the magnetic field of the electric current, and Hall sensor is then used to measure this magnetic field.Hall sensor output voltage signal with
The electric current for flowing through Hall sensor is directly proportional.
Hall sensor needs three power supply circuits, which includes positive pressure power supply circuit, negative pressure power supply electricity
Road and earthed circuit.
As shown in fig. 6, interface 1, interface 2, interface 3 and interface 4 are connect with four pins of Hall sensor respectively, first
Power supply circuit is mentioned to 4 offer -12V voltage of interface, earthed circuit to interface 2 to 1 offer+12V voltage of interface, the second power supply circuit
For ground voltage, the first detection circuit is used for the electric signal inputted from interface 3.
The electric current I for flowing through Hall sensor is directly proportional to the analog signal Vhall that Hall sensor exports, that is,
I=k*Vhall,
Wherein, k is proportionality coefficient.
First detection circuit can derive I by the Vhall that detection interface 3 inputs, to support that Hall sensor is complete
At measurement work.Second detection circuit and third detection circuit can with the voltage or electric current of precise measurement power supply circuit so that
The measurement result of Hall sensor is more accurate.
Sensor interface apparatus 200 can also connect the sensor of other four pins.
Fig. 7 shows the schematic diagram that Sensor interface apparatus 200 provided by the present application connects dry contact output type sensor.
As shown in fig. 7, four pins of dry contact output type sensor connect with four of Sensor interface apparatus 200 respectively
Mouth connection, wherein the first power supply circuit passes through voltage of the interface 1 to dry contact output type sensor offer+12V, earthed circuit
Ground voltage is provided to dry contact output type sensor by interface 2, the second power supply circuit passes through interface 4 to dry contact output type
The voltage of sensor offer -12V, the first detection circuit acquire electric signal by interface 3.
When the dry contact (in Fig. 7 shown in switch) of dry contact output type sensor disconnects, the first detection circuit is detected
Voltage be 0, when the dry contact of dry contact output type sensor closure, voltage that the first detection circuit detects is second to supply
Voltage of the voltage for -12V that circuit provides after dry contact output type sensor partial pressure, is acquired by the first detection circuit
To the variation of voltage value may determine that the stem grafting dotted state of dry contact output type sensor.
Sensor interface apparatus 200 can also connect the imported sensor of voltage transmitter, dry contact and NTC sensor,
Specific connection type can be referring to figs. 2 to shown in Fig. 4, and details are not described herein.
Optionally, Sensor interface apparatus 100 and Sensor interface apparatus 200 can also include other circuit structures.
Fig. 8 shows the schematic diagram of Sensor interface apparatus 300 provided by the present application.
As shown in figure 8, Sensor interface apparatus 300 includes four interfaces, respectively interface 1, interface 2, interface 3 and interface
4, under duplicate supply scene, interface 1 and interface 4 can be used as power supply interface and provides two-way power supply to sensor (such as to be mentioned respectively
For+12V voltage and -12V voltage), interface 2 and interface 3 can be used as the electric signal that measurement interface detection sensor exports；In list
Under scene of powering, interface 1 or interface 4 can be used as power supply interface and provides power supply all the way, excess-three interface conduct to sensor
Measure the electric signal of interface detection sensor input.R1 to R6 is six resistance.
First power supply circuit can also include the first current-limiting protection circuit, for limiting the electricity of the first power supply circuit offer
Stream, in case the trouble free service electric current beyond sensor causes to damage sensor.
Similarly, the second power supply circuit also may include the second current-limiting protection circuit, mention for limiting the second power supply circuit
The electric current of confession, in case the trouble free service electric current beyond sensor causes to damage sensor.
First current-limiting protection circuit and the second current-limiting protection circuit can refer to current-limiting protection circuit in the prior art, be
Succinct, details are not described herein.
ADC.1 is used to detect the electric signal inputted from interface 3, and ADC.2 is used to detect the electricity inputted from interface 1 and interface 2
Signal, ADC.3 are used to detect the electric signal inputted from interface 4, wherein ADC.1 is also used to detect the voltage of the first power supply circuit
And/or electric current, ADC.3 are also used to detect the voltage and or current of the second power supply circuit, can determine the first confession more accurately
The voltage and or current that circuit and the second power supply circuit provide, so that the measurement result of sensor is more accurate.
In the circuit connecting with interface 3, the triangle comprising 2904 indicates 2904 type operational amplifiers, can amplify sensing
The electric signal that device generates, so that the testing result of the first detection circuit is more accurate.The clamp circuit connecting with R4 is the first pincers
Position circuit, the input current potential that the first clamp circuit is configured as 2904 type operational amplifiers of limitation are less than or equal to the first current potential,
First current potential is the maximum potential of 2904 type operational amplifier trouble free services, thereby may be ensured that operational amplifier work is being pacified
Full potential region.The circuit connecting with earthed circuit is the second clamp circuit, and the second clamp circuit is configured as limitation ADC.1's
It inputs current potential and is less than or equal to the second current potential, the second current potential is the maximum potential of ADC.1 trouble free service, be thereby may be ensured that
ADC.1 works in safe potential areas.VbiasIt indicates the bias voltage that bias voltage circuit provides, is configured as mentioning to ADC.1
For compensating current potential, so as to provide compensation current potential, conducting first to ADC.1 in the lower situation of input current potential of ADC.1
Detection circuit, to ensure that the normal work of the first detection circuit.
It should be understood that Sensor interface apparatus 300 shown in Fig. 8 is by way of example only, sensor interface provided by the present application
Device can also include than the more circuit structures of Sensor interface apparatus 300 or less circuit structure.
Sensor interface apparatus 300 supports that the embodiment of different types of working sensor can be referring to figs. 2 to shown in Fig. 7
Embodiment, for sake of simplicity, details are not described herein.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein
Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Above-described specific embodiment has carried out further the purpose of the application, technical scheme and beneficial effects
It is described in detail, it should be understood that being not used to limit the application the foregoing is merely the specific embodiment of the application
Protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of the technical solution of the application, done should all
Including within the scope of protection of this application.
Claims (9)
1. a kind of Sensor interface apparatus characterized by comprising
First interface, second interface and third interface, the first interface, the second interface and the third interface are for connecting
Connect the pin of sensor；
First power supply circuit is configured as powering to the first interface；
First detection circuit is configured as detecting the electric signal inputted from the third interface；
Second detection circuit is configured as connecting by resistance (R1) with the first interface, and second detection circuit includes
Second analog-digital converter ADC, the second analog-digital converter ADC is for detecting the electric signal inputted from the first interface, institute
Stating from the electric signal that the first interface inputs includes analog electrical signal that sensor inputs, or including first power supply circuit
The analog electrical signal of input, or the simulation of the analog electrical signal including sensor input and first power supply circuit input
Electric signal,
Wherein, when the analog electrical signal inputs the second analog-digital converter ADC by the first interface, described second
The analog electrical signal is changed into digital electric signal and is input to digital signal processing device by analog-digital converter ADC；
Earthed circuit is configured as connecting with the second interface.
2. Sensor interface apparatus according to claim 1, which is characterized in that further include:
4th interface, for connecting the pin of sensor；
Second power supply circuit is configured as powering to the 4th interface.
3. Sensor interface apparatus according to claim 2, which is characterized in that second power supply circuit includes:
Second current-limiting protection circuit, the electric current for being configured as limiting first power supply circuit are less than or equal to the second electric current, institute
State the maximum current that the second electric current is sensor safe work.
4. Sensor interface apparatus according to any one of claim 1 to 3, which is characterized in that further include:
4th interface, for connecting the pin of sensor；
Third detection circuit is configured as detecting the electric signal inputted from the 4th interface, and/or, it is configured as detection institute
State the voltage and or current of the second power supply circuit.
5. Sensor interface apparatus according to any one of claim 1 to 4, which is characterized in that
Second detection circuit is configured as detecting the electric signal inputted from the second interface.
6. Sensor interface apparatus according to any one of claim 1 to 5, which is characterized in that the first detection electricity
Road includes:
Operational amplifier is configured as amplifying the electric signal inputted from the third interface；
First clamp circuit, the input current potential for being configured as limiting the operational amplifier is less than or equal to the first current potential, described
First current potential is the maximum potential of the operational amplifier trouble free service.
7. Sensor interface apparatus according to any one of claim 1 to 6, which is characterized in that the first detection electricity
Road includes:
First analog-digital converter ADC is configured as detecting the electric signal inputted from the third interface；
Second clamp circuit, the input current potential for being configured as limiting the first ADC are less than or equal to the second current potential, and described second
Current potential is the maximum potential of the first ADC trouble free service.
8. Sensor interface apparatus according to any one of claim 1 to 7, which is characterized in that the first detection electricity
Road includes:
First ADC is configured as detecting the electric signal inputted from the third interface；
Bias voltage circuit is configured as providing compensation current potential to the first ADC.
9. Sensor interface apparatus according to any one of claim 1 to 8, which is characterized in that the first power supply electricity
Road includes:
First current-limiting protection circuit, the electric current for being configured as limiting first power supply circuit are less than or equal to the first electric current, institute
State the maximum current that the first electric current is sensor safe work.
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| CN201810687181.8A CN109141495B (en) | 2018-06-28 | 2018-06-28 | Sensor interface device |
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|---|---|---|---|
| CN201810687181.8A CN109141495B (en) | 2018-06-28 | 2018-06-28 | Sensor interface device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367074A (en) * | 2020-10-29 | 2021-02-12 | 中船动力研究院有限公司 | Single-set interface multifunctional isolation signal processing circuit |
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| CN206531516U (en) * | 2017-03-01 | 2017-09-29 | 武汉智菱物联科技有限公司 | A kind of interface circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367074A (en) * | 2020-10-29 | 2021-02-12 | 中船动力研究院有限公司 | Single-set interface multifunctional isolation signal processing circuit |
| CN112367074B (en) * | 2020-10-29 | 2024-05-24 | 中船动力研究院有限公司 | Single-set-interface multifunctional isolation signal processing circuit |
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