CN109240255A - Signal detection interface circuit, system and signal detecting method - Google Patents
Signal detection interface circuit, system and signal detecting method Download PDFInfo
- Publication number
- CN109240255A CN109240255A CN201710557659.0A CN201710557659A CN109240255A CN 109240255 A CN109240255 A CN 109240255A CN 201710557659 A CN201710557659 A CN 201710557659A CN 109240255 A CN109240255 A CN 109240255A
- Authority
- CN
- China
- Prior art keywords
- circuit
- transistor
- module
- signal
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 243
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 27
- 238000003745 diagnosis Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- 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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- 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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of signal detection interface circuit, system and signal detecting methods, the signal detection interface circuit is connected between a controller and a current sensor or a voltage sensor, the signal detection interface circuit carries out processing to the detection signal of the current sensor or the voltage sensor and forms an interface signal, and the interface signal is provided to the controller by the signal detection interface circuit.
Description
Technical field
The present invention relates to vehicle control device technical field, in particular to a kind of signal detection interface circuit, system and signal
Detection method.
Background technique
Due to entire vehicle need detect contain much information, type is more, situation is complicated, reliability requirement is high, vehicle
Controller need to carry multiple interfaces, if voltage mode signals Interference fit voltage sensor uses, current mode signal Interference fit
Current sensor uses, and the quantity of voltage sensor and current sensor that the vehicle control device of different model is used cooperatively is not
Together, in design early period of vehicle control device, higher compatibility should be met as far as possible, but this needs while increasing voltage mode signals
The quantity of interface and current mode signal interface, while the quantity and area increase of interface circuit are increased, cost is caused, is controlled
The problem of device peripheral circuit area processed becomes larger.
Therefore, it is necessary to design a kind of detection signaling interface side for reducing vehicle control device peripheral interface circuit quantity and area
Case.
Summary of the invention
The purpose of the present invention is to provide a kind of signal detection interface circuit, system and signal detecting methods, existing to solve
The excessive problem of some vehicle control device interface quantities.
In order to solve the above technical problems, the present invention provides a kind of signal detection interface circuit, the signal detection interface electricity
Road is connected between a controller and a current sensor or a voltage sensor, and the signal detection interface circuit is to the electricity
The detection signal of flow sensor or the voltage sensor carries out processing and forms an interface signal, the signal detection interface circuit
The interface signal is provided to the controller, the signal detection interface circuit includes detection switching circuit, power offer
Circuit and bleeder circuit, in which:
The detection switching circuit connects the current sensor or the voltage sensor, the detection switching circuit packet
Include the first module, the second module and third module；
When the detection switching circuit connects the current sensor, first module and second module have
Effect, first module controls the on or off of second module according to the detection signal of the current sensor, described
Second module is connected to the power and provides between circuit and the bleeder circuit, and the turn-on and turn-off of second module control
The power provides the case where circuit provides power to the bleeder circuit, and the bleeder circuit is led according to second module
Logical or shutdown forms current interface signal；
When the detection switching circuit connects the voltage sensor, first module and the third module have
Effect, the power provide circuit and connect the bleeder circuit, first mould with the third module by first module
Root tuber controls the power according to the detection signal of the voltage sensor and provides feelings of the circuit to bleeder circuit offer power
Condition, the bleeder circuit is according to formation voltage interface signal the case where providing power.
Optionally, in the signal detection interface circuit, it includes the first transistor and that the power, which provides circuit,
Two-transistor, the first transistor connection power supply and the detection switching circuit, one detection of second transistor connection make
Energy end, the detection enable end makes the second transistor on or off.
Optionally, in the signal detection interface circuit, the first transistor is PNP type triode, described
Two-transistor is NPN type triode, and the base stage of the first transistor connects the collector of the second transistor, described first
The emitter of transistor connects power supply, and the collector of the first transistor connects first module；The second transistor
Base stage connect the detection enable end, the emitter ground connection of the second transistor.
Optionally, in the signal detection interface circuit, the base stage of the first transistor and the span of emitter
Connect a resistance, between the base stage of the first transistor and the collector of the second transistor have a resistance, described second
A resistance is bridged between the base stage and emitter of transistor, is had between the base stage of the second transistor and the detection enable end
There is a resistance.
Optionally, in the signal detection interface circuit, it further includes a diode that the power, which provides circuit, described
The cathode of diode connects the emitter of the first transistor, and the anode of the diode connects power supply.
Optionally, in the signal detection interface circuit, first module includes first resistor, first electricity
One end of resistance connects the collector of the first transistor, and the other end connects the current sensor or the voltage sensor,
Wherein:
When the detection switching circuit connects the current sensor, the resistance value of the first resistor is 200 ohm~
400 ohm；
When the detection switching circuit connects the voltage sensor, the resistance value of the first resistor is 800 ohm~
1500 ohm.
Optionally, in the signal detection interface circuit, second module includes third transistor, second resistance
And 3rd resistor, the third transistor are PNP type triode, first module is believed according to the detection of the current sensor
The on or off of number control third transistor, the collector of the third transistor connects the bleeder circuit, described
The emitter of third transistor connects the power and provides circuit, and the second resistance and described 3rd resistor one end are all connected with institute
The base stage of third transistor is stated, the other end is connected to the both ends of the first resistor, the first resistor and the third
Resistance connecting pin is also connected with the emitter of the third transistor.
Optionally, in the signal detection interface circuit, the third module includes the 4th resistance, the 4th electricity
The resistance value of resistance is less than 0.05 ohm, the collector of one end connection third transistor of the 4th resistance, described in other end connection
The connecting pin of first resistor and the second resistance.
Optionally, in the signal detection interface circuit, the bleeder circuit includes the 5th resistance and the 6th resistance,
Described 5th resistance one end connects the collector of the third transistor, and the other end connects the controller, the 6th resistance
One end connects the controller, other end ground connection.
Optionally, in the signal detection interface circuit, the signal detection interface circuit further includes diagnostic circuit,
For the diagnostic circuit when the detection switching circuit connects current sensor, detection is shorted failure over the ground.
Optionally, in the signal detection interface circuit, the diagnostic circuit includes the 4th transistor, the 5th crystal
Pipe and clamp circuit, in which:
4th transistor is PNP type triode, and the 5th transistor is NPN type triode, the 4th crystal
The emitter of pipe connects the current sensor or the voltage sensor, the base stage connection the described 5th of the 4th transistor
The collector of the collector of transistor, the 4th transistor connects the clamp circuit, the emitter of the 5th transistor
Ground connection, the one diagnosis enable end of base stage connection of the 5th transistor, the diagnosis enable end makes the 5th transistor turns
Or shutdown.
Optionally, in the signal detection interface circuit, the base stage of the 4th transistor and the span of emitter
Connect a resistance, between the base stage of the 4th transistor and the collector of the 5th transistor have a resistance, the described 5th
A resistance is bridged between the base stage and emitter of transistor, is had between the base stage of the 5th transistor and the diagnosis enable end
There is a resistance.
Optionally, in the signal detection interface circuit, the clamp circuit includes the 7th resistance and the 8th resistance,
Described 7th resistance one end connects the collector of the 4th transistor, and the other end connects the controller, the 8th resistance
One end connects the controller, other end ground connection.
Optionally, in the signal detection interface circuit, the clamp circuit further includes the 9th resistance and the first electricity
Hold, the 9th resistance and first capacitor form filter circuit, and described 9th resistance one end connects the 7th resistance and described
8th resistance, the other end connect the controller, and described first capacitor one end connects the controller, other end ground connection.
The present invention also provides a kind of signal detection interface system, the signal detection interface system includes signal detection interface
Circuit, controller, sensor, in which:
The signal detection interface circuit is connected between the controller and the sensor, the signal detection interface
Circuit carries out processing to the detection signal of the sensor and forms an interface signal, and the signal detection interface circuit connects described
Message number is provided to the controller；
The signal detection interface circuit includes detection switching circuit, power offer circuit and bleeder circuit, the detection
Switching circuit connects the sensor, and the detection switching circuit includes the first module, the second module and third module；
When the sensor is a current sensor, first module and second module are effective, and described first
Module controls the on or off of second module, the second module connection according to the detection signal of the current sensor
It is provided between circuit and the bleeder circuit in the power, the turn-on and turn-off of second module control the power and provide
The case where circuit provides power to the bleeder circuit, the bleeder circuit is formed according to the on or off of second module
Current interface signal；
When the sensor is a voltage sensor, first module and the third module are effective, the power
Circuit is provided, the bleeder circuit is connected with the third module by first module, first module is according to the electricity
The detection signal of pressure sensor controls the power and provides the case where circuit provides power to the bleeder circuit, the partial pressure electricity
Road is according to formation voltage interface signal the case where providing power.
Optionally, in the signal detection interface system, the current sensor forms first according to measurand
Measured signal, the current sensor include the 6th transistor and current source, and the 6th transistor is NPN type triode, institute
The base stage for stating the 6th transistor is controlled by first measured signal, and the collector of the 6th transistor connects the electric current
Source, the emitter ground connection of the 6th transistor.
Optionally, in the signal detection interface system, the voltage sensor forms second according to measurand
Measured signal, the voltage sensor include the 7th transistor, and the 7th transistor is NPN type triode, and the described 7th is brilliant
The base stage of body pipe is controlled by second measured signal, and the collector of the 7th transistor connects the signal detection interface
Circuit, the emitter ground connection of the 7th transistor.
The present invention also provides a kind of signal detecting method, the signal detecting method includes:
Signal detection interface circuit carries out processing to the detection signal of sensor and forms an interface signal, the signal detection
The interface signal is provided to controller by interface circuit；
When the sensor be a current sensor when, the first module and the second module are effective, first module according to
The detection signal of the current sensor controls the on or off of second module, and second module is connected to power and mentions
For between circuit and bleeder circuit, the turn-on and turn-off of second module control the power and provide circuit to the partial pressure electricity
Road provides the case where power, and the bleeder circuit forms current interface signal according to the on or off of second module；
When the sensor is a voltage sensor, first module and third module are effective, and the power provides
Circuit connects the bleeder circuit with the third module by first module, and first module is passed according to the voltage
The detection signal of sensor controls the power and provides the case where circuit provides power to the bleeder circuit, the bleeder circuit root
According to formation voltage interface signal the case where providing power.
Optionally, in the signal detecting method, first module effectively includes: to have electric current stream in first resistor
It crosses.
Optionally, in the signal detecting method, second module effectively includes: third transistor, the second electricity
There is electric current to flow through in resistance and 3rd resistor.
Optionally, in the signal detecting method, the third module effectively includes: to have electric current stream in the 4th resistance
It crosses.
In signal detection interface circuit provided by the invention, system and signal detecting method, switched by the detection
Described in circuit connection when current sensor, the second module is effective, when the detection switching circuit connects the voltage sensor, the
Three modules are effective, the compatibility of signal detection interface circuit can be improved in designing circuit early period, and due to current sensor
It is used in conjunction with the same signal detection interface circuit with voltage sensor, therefore the number of interface circuit component will not be greatly increased
The area of amount and circuit board, save the cost.The present invention realizes under the premise of integrated circuit topological structure is constant, is pasted by choosing
Component realizes the compatible design of voltage sensor and current sensor interface, saves system cost, improves the suitable of interface
The property used.Circuit builds completion with better simply component, and hardware cost is lower, in addition, protecting for current sensor interface
The design of shield property, diagnostic circuit can be detected interface shorted to earth failure, improve the safety of interface circuit.
Detailed description of the invention
Fig. 1 is signal detection interface circuit, system and signal detecting method schematic diagram of the present invention；
Fig. 2 is signal detection interface circuit of the present invention and current sensor connection schematic diagram；
Fig. 3 is signal detection interface circuit of the present invention and voltage sensor connection schematic diagram；
It is as shown in the figure: 10- signal detection interface circuit；11- detects switching circuit；12- power provides circuit；13- partial pressure
Circuit；14- diagnostic circuit；20- controller；30- sensor；31- current sensor；32- voltage sensor；40- power supply.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to signal detection interface circuit, system and signal detection proposed by the present invention
Method is described in further detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It needs
Bright, attached drawing is all made of very simplified form and using non-accurate ratio, only conveniently, lucidly to aid in illustrating
The purpose of the embodiment of the present invention.
Core of the invention thought is to provide a kind of signal detection interface circuit, system and signal detecting method to reduce
Vehicle control device peripheral interface circuit quantity and area.
To realize above-mentioned thought, the present invention provides a kind of signal detection interface circuit, system and signal detecting method, institutes
It states signal detection interface circuit to be connected between a controller and a current sensor or a voltage sensor, the signal detection
Interface circuit carries out processing to the detection signal of the current sensor or the voltage sensor and forms an interface signal, described
The interface signal is provided to the controller by signal detection interface circuit, and the signal detection interface circuit includes that detection is cut
Change circuit, power provides circuit and bleeder circuit, in which: the detection switching circuit connects the current sensor or the electricity
Pressure sensor, the detection switching circuit include the first module, the second module and third module；When the detection switching circuit connects
When connecing the current sensor, first module and second module are effective, and first module is passed according to the electric current
The detection signal of sensor controls the on or off of second module, and second module is connected to the power and provides circuit
Between the bleeder circuit, the turn-on and turn-off of second module control the power and provide circuit to the bleeder circuit
The case where providing power, the bleeder circuit form current interface signal according to the on or off of second module；Work as institute
When stating the detection switching circuit connection voltage sensor, first module and the third module are effective, and the power mentions
The bleeder circuit is connected with the third module by first module for circuit, first module is according to the voltage
The detection signal of sensor controls the power and provides the case where circuit provides power to the bleeder circuit, the bleeder circuit
According to formation voltage interface signal the case where providing power.
<embodiment one>
As shown in Figures 1 to 3, the present embodiment provides a kind of signal detection interface circuit 10, the signal detection interface circuits
10 are located in the peripheral circuit of a controller 20, and the signal detection interface circuit 10 connects a current sensor 31 or a voltage
Sensor 32, the signal detection interface circuit are connected between a controller and a current sensor or a voltage sensor,
The signal detection interface circuit 10 handles the detection signal of the current sensor 31 or the voltage sensor 32
An interface signal is formed, the interface signal is provided to the controller 20, the letter by the signal detection interface circuit 10
Number detection interface circuit 10 includes that detection switching circuit 11, power provide circuit 12 and bleeder circuit 13, in which: the detection is cut
Current sensor described in circuit connection or the voltage sensor are changed, the detection switching circuit includes the first module, the second mould
Block and third module；When the detection switching circuit 11 connects the current sensor 31, first module and described
Two modules are effective, first module according to the detection signal of the current sensor 31 control second module conducting or
Shutdown, second module are connected to the power and provide between circuit 12 and the bleeder circuit 13, second module
Turn-on and turn-off control the power and provide the case where circuit 12 provides power to the bleeder circuit 13, the bleeder circuit 13
Current interface signal is formed according to the on or off of second module；When the detection switching circuit 11 connects the voltage
When sensor 32, first module and the third module are effective, and the power provides circuit 12 and passes through first module
Connect the bleeder circuit 13 with the third module, first module is according to the detection signal control of the voltage sensor 32
It makes the power and the case where circuit 12 provides power to the bleeder circuit 13 is provided, the bleeder circuit 13 is according to offer power
The case where formed voltage interface signal.
In signal detection interface circuit provided in this embodiment, the electric current is connected by the detection switching circuit 11
When sensor 31, the second module is effective, and when the detection switching circuit 11 connects the voltage sensor 32, third module has
Effect can improve the compatibility of signal detection interface circuit in designing circuit early period, and due to current sensor 31 and voltage
Sensor 32 is used in conjunction with the same signal detection interface circuit 10, therefore will not greatly increase the quantity of interface circuit component
With the area of circuit board, save the cost.
Specifically, it includes the first transistor that the power, which provides circuit 12, in the signal detection interface circuit 10
Q1 and second transistor Q2, the first transistor Q1 connection power supply 40 and the detection switching circuit 11, second crystal
Pipe Q2 connection one detects enable end POWER_EN, and the detection enable end makes the second transistor on or off.Described
One transistor Q1 is PNP type triode, and the second transistor Q2 is NPN type triode, the base stage of the first transistor Q1
The collector of the second transistor Q2 is connected, the emitter of the first transistor Q1 connects power supply 40, the first crystal
The collector of pipe Q1 connects first module；The base stage of the second transistor Q2 connects the detection enable end POWER_
The emitter of EN, the second transistor Q2 are grounded.In the signal detection interface circuit, the first transistor Q1's
A resistance R10, the current collection of the base stage of the first transistor Q1 and the second transistor Q2 are bridged between base stage and emitter
There is a resistance R11 between pole, bridge a resistance R12 between the base stage and emitter of the second transistor Q2, described second
There is a resistance R13 between the base stage of transistor Q2 and the detection enable end POWER_EN.
Further, in the signal detection interface circuit, it further includes a diode that the power, which provides circuit 12,
D1, the cathode of the diode D1 connect the emitter of the first transistor Q1, and the anode of the diode D1 connects power supply
40。
Further, in the signal detection interface circuit, first module includes first resistor R1, described
One end of first resistor R1 connects the collector of the first transistor Q1, and the other end connects the current sensor 31 or described
Voltage sensor 32, in which: when the detection switching circuit 11 connects the current sensor 31, the first resistor R1's
Resistance value is 200 ohm~400 ohm；When the detection switching circuit 11 connects the voltage sensor 32, first electricity
The resistance value for hindering R1 is 800 ohm~1500 ohm.
In addition, second module includes third transistor Q3, second resistance in the signal detection interface circuit
R2 and 3rd resistor R3, the third transistor Q3 are PNP type triode, and first module is according to the current sensor 31
Detection signal control the on or off of the third transistor Q3, described point of the collector connection of the third transistor Q3
Volt circuit 13, the emitter of the third transistor Q3 connect the power and provide circuit 12, the second resistance R2 and described
The one end 3rd resistor R3 is all connected with the base stage of the third transistor Q3, and the other end is connected to the two of the first resistor R1
End, the first resistor R1 and the connecting pin the 3rd resistor R3 are also connected with the emitter of the third transistor Q3.
Specifically, in the signal detection interface circuit, the third module includes the 4th resistance R4, the described 4th
The resistance value of resistance R4 is close to zero ohm, the current collection of one end connection third transistor Q3 of the 4th resistance R4 less than 0.05
Pole, the other end connect the connecting pin of the first resistor R1 and the second resistance R2.
As shown in Figures 1 to 3, in the signal detection interface circuit, the bleeder circuit 13 includes the 5th resistance R5
With the 6th resistance R6, the one end the 5th resistance R5 connects the collector of the third transistor Q3, and the other end connects the control
Device 20 processed, described 6th one end resistance R6 connect the controller 20, other end ground connection.
Further, in the signal detection interface circuit, the signal detection interface circuit 10 further includes diagnosis
Circuit 14, for the diagnostic circuit 14 when the detection switching circuit 11 connects current sensor 31, detection is shorted failure over the ground.
The diagnostic circuit 14 includes the 4th transistor Q4, the 5th transistor Q5 and clamp circuit, in which: the 4th transistor Q4 is
PNP type triode, the 5th transistor Q5 are NPN type triode, and the emitter of the 4th transistor Q4 connects the electricity
The base stage of flow sensor 31 or the voltage sensor 32, the 4th transistor Q4 connects the current collection of the 5th transistor Q5
Pole, the collector of the 4th transistor Q4 connect the clamp circuit, and the emitter ground connection of the 5th transistor Q5 is described
The one diagnosis enable end DIAG_EN of base stage connection of 5th transistor Q5, the diagnosis enable end makes the 5th transistor turns
Or shutdown.In addition, being bridged between the base stage and emitter of the 4th transistor Q4 in the signal detection interface circuit
One resistance R14 has a resistance R15 between the base stage of the 4th transistor Q4 and the collector of the 5th transistor Q5,
Bridge a resistance R16 between the base stage and emitter of the 5th transistor Q5, the base stage of the 5th transistor Q5 with it is described
Diagnosing has a resistance R17 between the DIAG_EN of enable end.
The clamp circuit includes the 7th resistance R7 and the 8th resistance R8, the 7th one end resistance R7 connection the described 4th
The collector of transistor Q4, the other end connect the controller 20, and described 8th one end resistance R8 connects the controller 20, separately
One end ground connection.In the signal detection interface circuit, the clamp circuit further includes the 9th resistance R9 and first capacitor C1,
The 9th resistance R9 and first capacitor C1 form filter circuit, described 9th one end resistance R9 connect the 7th resistance R7 and
The 8th resistance R8, the other end connect the controller 20, and the one end the first capacitor C1 connects the controller 20, another
End ground connection.
To sum up, the various configuration of signal detection interface circuit is described in detail in above-described embodiment, certainly, the present invention
Cited configuration, any to be converted on the basis of configuration provided by the above embodiment in including but not limited to above-mentioned implementation
Content, belong to the range protected of the present invention.It is anti-that those skilled in the art can lift one according to the content of above-described embodiment
Three.
The present invention realizes under the premise of integrated circuit topological structure is constant, realizes voltage sensor by choosing patch component
The compatible design of device 32 and current sensor interface 31, saves system cost, improves the applicability of interface.Circuit is with simpler
Single component builds completion, and hardware cost is lower, in addition, having done Protective Design, diagnosis electricity for current sensor interface
Interface shorted to earth failure can be detected in road, improves the safety of interface circuit.
<embodiment two>
As shown in Figure 1, the present embodiment also provides a kind of signal detection interface system and signal detecting method, the signal inspection
Surveying interface system includes signal detection interface circuit 10, controller 20, sensor 30, in which: the signal detection interface circuit
10 are connected between the controller 20 and the sensor 30, and the signal detection interface circuit 10 is to the sensor 30
Detection signal carries out processing and forms an interface signal, and the interface signal is provided to described by the signal detection interface circuit 10
Controller 20；The signal detection interface circuit 10 includes detecting switching circuit 11, power offer circuit 12 and bleeder circuit 13,
The detection switching circuit 11 connects the sensor 30, the detection switching circuit 11 include the first module, the second module and
Third module.
Specifically, in the signal detection interface system, as shown in Fig. 2, when the sensor is a current sense
When device 31, the current sensor forms the first measured signal according to measurand, and the current sensor 31 includes the 6th brilliant
Body pipe Q6 and current source, the 6th transistor Q6 is NPN type triode, and the base stage of the 6th transistor Q6 is by the first quilt
Signal control is surveyed, the collector of the 6th transistor Q6 connects the current source S1, the emitter of the 6th transistor Q6
Ground connection；First module and second module are effective, and first module is believed according to the detection of the current sensor 31
The on or off of number control second module, second module are connected to the power and provide circuit 12 and the partial pressure
Between circuit 13, the turn-on and turn-off of second module control the power offer circuit 12 and provide to the bleeder circuit 13
The case where power, the bleeder circuit 13 form current interface signal according to the on or off of second module.
As shown in figure 3, the voltage sensor is according to measurand shape when the sensor is a voltage sensor 32
At the second measured signal, the voltage sensor 32 includes the 7th transistor Q7, and the 7th transistor Q7 is three pole of NPN type
Pipe, the base stage of the 7th transistor Q7 are controlled by the second measured signal, and the collector of the 7th transistor Q7 connects institute
State signal detection interface circuit 10, the emitter ground connection of the 7th transistor Q7；First module and the third module
Effectively, the power provides circuit 12 and connects the bleeder circuit 13 with the third module by first module, described
First module controls the power according to the detection signal of the voltage sensor 31 and provides circuit 12 to the bleeder circuit 13
The case where providing power, the bleeder circuit 13 is according to formation voltage interface signal the case where providing power.
In signal detection interface system provided in this embodiment, the electric current is connected by the detection switching circuit 11
When sensor 31, the second module is effective, and when the detection switching circuit 11 connects the voltage sensor 32, third module has
Effect can improve the compatibility of signal detection interface circuit in designing circuit early period, and due to current sensor 31 and voltage
Sensor 32 is used in conjunction with the same signal detection interface circuit 10, therefore will not greatly increase the quantity of interface circuit component
With the area of circuit board, save the cost.
Specifically, it includes the first transistor that the power, which provides circuit 12, in the signal detection interface system 10
Q1 and second transistor Q2, the first transistor Q1 connection power supply 40 and the detection switching circuit 11, second crystal
Pipe Q2 connection one detects enable end POWER_EN.The first transistor Q1 is PNP type triode, and the second transistor Q2 is
NPN type triode, the base stage of the first transistor Q1 connect the collector of the second transistor Q2, the first transistor
The emitter of Q1 connects power supply 40, and the collector of the first transistor Q1 connects first module；The second transistor
The base stage of Q2 connects the detection enable end POWER_EN, the emitter ground connection of the second transistor Q2.In the signal
It detects in interface circuit, a resistance R10, the first transistor is bridged between the base stage and emitter of the first transistor Q1
Between the base stage of Q1 and the collector of the second transistor Q2 have a resistance R11, the base stage of the second transistor Q2 and
A resistance R12 is bridged between emitter, is had between the base stage of the second transistor Q2 and the detection enable end POWER_EN
There is a resistance R13.
Further, in the signal detection interface system, it further includes a diode that the power, which provides circuit 12,
D1, the cathode of the diode D1 connect the emitter of the first transistor Q1, and the anode of the diode D1 connects power supply
40。
Further, in the signal detection interface system, first module includes first resistor R1, described
One end of first resistor R1 connects the collector of the first transistor Q1, and the other end connects the current sensor 31 or described
Voltage sensor 32, in which: when the detection switching circuit 11 connects the current sensor 31, the first resistor R1's
Resistance value is 200 ohm~400 ohm；When the detection switching circuit 11 connects the voltage sensor 32, first electricity
The resistance value for hindering R1 is 800 ohm~1500 ohm.
In addition, second module includes third transistor Q3, second resistance in the signal detection interface system
R2 and 3rd resistor R3, the third transistor Q3 are PNP type triode, and first module is according to the current sensor 31
Detection signal control the on or off of the third transistor Q3, described point of the collector connection of the third transistor Q3
Volt circuit 13, the emitter of the third transistor Q3 connect the power and provide circuit 12, the second resistance R2 and described
The one end 3rd resistor R3 is all connected with the base stage of the third transistor Q3, and the other end is connected to the two of the first resistor R1
End, the first resistor R1 and the connecting pin the 3rd resistor R3 are also connected with the emitter of the third transistor Q3.
Specifically, in the signal detection interface system, the third module includes the 4th resistance R4, the described 4th
The resistance value of resistance R4 is zero ohms, the collector of one end connection third transistor Q3 of the 4th resistance R4, other end connection
The connecting pin of the first resistor R1 and the second resistance R2.
As shown in Figures 1 to 3, in the signal detection interface system, the bleeder circuit 13 includes the 5th resistance R5
With the 6th resistance R6, the one end the 5th resistance R5 connects the collector of the third transistor Q3, and the other end connects the control
Device 20 processed, described 6th one end resistance R6 connect the controller 20, other end ground connection.
Further, in the signal detection interface circuit, the signal detection interface circuit 10 further includes diagnosis
Circuit 14, when the signal detection interface circuit 10 connects current sensor 31, detection is shorted the diagnostic circuit 14 over the ground
Failure.The diagnostic circuit 14 includes the 4th transistor Q4, the 5th transistor Q5 and clamp circuit, in which: the 4th crystal
Pipe Q4 is PNP type triode, and the 5th transistor Q5 is NPN type triode, and the emitter of the 4th transistor Q4 connects
The base stage of the current sensor 31 or the voltage sensor 32, the 4th transistor Q4 connects the 5th transistor Q5
Collector, the collector of the 4th transistor Q4 connects the clamp circuit, and the emitter of the 5th transistor Q5 connects
Ground, the one diagnosis enable end DIAG_EN of base stage connection of the 5th transistor Q5.In addition, in the signal detection interface electricity
Lu Zhong, bridges a resistance R14 between the base stage and emitter of the 4th transistor Q4, the base stage of the 4th transistor Q4 with
There is a resistance R15, between the base stage and emitter of the 5th transistor Q5 between the collector of the 5th transistor Q5
A resistance R16 is bridged, there is a resistance R17 between the base stage of the 5th transistor Q5 and the diagnosis enable end DIAG_EN.
The clamp circuit includes the 7th resistance R7 and the 8th resistance R8, the 7th one end resistance R7 connection the described 4th
The collector of transistor Q4, the other end connect the controller 20, and described 8th one end resistance R8 connects the controller 20, separately
One end ground connection.In the signal detection interface circuit, the clamp circuit further includes the 9th resistance R9 and first capacitor C1,
The 9th resistance R9 and first capacitor C1 form filter circuit, described 9th one end resistance R9 connect the 7th resistance R7 and
The 8th resistance R8, the other end connect the controller 20, and the one end the first capacitor C1 connects the controller 20, another
End ground connection.
The present invention also provides a kind of signal detecting method, the signal detecting method includes: signal detection interface circuit 10
Processing is carried out to the detection signal of sensor 30 and forms an interface signal, the signal detection interface circuit 10 believes the interface
Number it is provided to controller 20；When the sensor 30 is a current sensor 31, the first module and the second module are effective, described
First module controls the on or off of second module, second module according to the detection signal of the current sensor
It is connected to power to provide between circuit 12 and bleeder circuit 13, the turn-on and turn-off of second module control the power and provide
The case where circuit 12 provides power to the bleeder circuit 13, conducting or pass of the bleeder circuit 13 according to second module
It is disconnected to form current interface signal；When the sensor is a voltage sensor 32, first module and third module are effective,
The power provides circuit 12 and connects the bleeder circuit 13, first mould with the third module by first module
Root tuber controls the power according to the detection signal of the voltage sensor 32 and provides circuit 12 to the bleeder circuit 13 offer function
The case where rate, the bleeder circuit 13 is according to formation voltage interface signal the case where providing power.
Specifically, first module effectively includes: to have electric current to flow through in first resistor R1.Second module is effectively wrapped
It includes: thering is electric current to flow through in third transistor Q3, second resistance R2 and 3rd resistor R3.The third module effectively includes:
There is electric current to flow through in four resistance R4.
As shown in Fig. 2, when signal detection interface circuit 10 is used cooperatively current sensor 31, third Module Fail,
For 4th resistance R4 without welding, power supply 40 provides DC voltage, by diode D1, when detection, detects enable end POWER_
EN exports high potential, second transistor Q2 conducting, and Q2 collector is pulled to low potential, and the first transistor Q1 is connected, and power supply 40 is defeated
Supply voltage out is supplied to detection switching circuit 11, and the first measured signal S2 is current signal, the electricity in current sensor 31
Stream source S1 is constant-current source, and current sensor 31 determines the 6th according to the magnitude relation between the first measured signal S2 and current source S1
The pwm voltage of transistor Q6, the ratio of the time of Q6 turn-on and turn-off can reflect the amplitude of the first measured signal.When
When first measured signal amplitude is greater than threshold value, the conducting electric current of current sensor is larger, and the electric current for flowing through first resistor R1 is equal to
The conducting electric current of current sensor, when the voltage value at the both ends first resistor R1 is larger, it is sufficient to make third transistor Q3 base stage and hair
When voltage between emitter-base bandgap grading is greater than the conducting voltage of third transistor, third transistor conducting, supply voltage passes through third crystal
Pipe is transmitted to bleeder circuit 13, and is delivered to controller 20 by bleeder circuit.
As shown in figure 3, when signal detection interface circuit 10 is used cooperatively voltage sensor 32, the second Module Fail,
The 7th transistor Q7 root of third transistor Q3, second resistance R2 and 3rd resistor R3 without welding, in voltage sensor 32
According to the amplitude turn-on and turn-off of the second measured signal, the amplitude of the ratio of turn-on and turn-off time and the second measured signal is at just
Than when the 7th transistor Q7 is connected, the connecting pin ground connection of R1 and R4, bleeder circuit 13 are defeated by 20 low level of controller, and the 7th is brilliant
When body pipe Q7 is turned off, R1 is directlyed proportional to the level of the connecting pin of R4 to supply voltage, and bleeder circuit 13 is defeated by the high electricity of controller 20
It is flat, and the amplitude of the high level is directly proportional to supply voltage, low level and high level are alternately present, and the ratio of the two is and second
Measured signal is related.
In signal detection interface system provided in this embodiment and signal detecting method, pass through the detection switching circuit
When connecting the current sensor, the second module is effective, when the detection switching circuit connects the voltage sensor, third mould
Block is effective, the compatibility of signal detection interface circuit can be improved in designing circuit early period, and due to current sensor and electricity
Pressure sensor is used in conjunction with the same signal detection interface circuit, thus will not greatly increase interface circuit component quantity and
The area of circuit board, save the cost.
The present invention realizes under the premise of integrated circuit topological structure is constant, realizes voltage sensor by choosing patch component
The compatible design of device 32 and current sensor interface 31, saves system cost, improves the applicability of interface.Circuit is with simpler
Single component builds completion, and hardware cost is lower, in addition, having done Protective Design, diagnosis electricity for current sensor interface
Interface shorted to earth failure can be detected in road, improves the safety of interface circuit.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, due to corresponding to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (21)
1. a kind of signal detection interface circuit, the signal detection interface circuit be connected to a controller and a current sensor or
Between one voltage sensor, the signal detection interface circuit believes the detection of the current sensor or the voltage sensor
It number carrying out processing and forms an interface signal, the interface signal is provided to the controller by the signal detection interface circuit,
It is characterized in that, the signal detection interface circuit includes detection switching circuit, power offer circuit and bleeder circuit, in which:
The detection switching circuit connects the current sensor or the voltage sensor, and the detection switching circuit includes the
One module, the second module and third module；
When the detection switching circuit connects the current sensor, first module and second module are effective, institute
State the on or off that the first module controls second module according to the detection signal of the current sensor, second mould
Block is connected to the power and provides between circuit and the bleeder circuit, and the turn-on and turn-off of second module control the function
Rate provides the case where circuit provides power to the bleeder circuit, conducting or pass of the bleeder circuit according to second module
It is disconnected to form current interface signal；
When the detection switching circuit connects the voltage sensor, first module and the third module are effective, institute
State power circuit be provided and the bleeder circuit is connected with the third module by first module, first module according to
The detection signal of the voltage sensor controls the power and provides the case where circuit provides power to the bleeder circuit, described
Bleeder circuit is according to formation voltage interface signal the case where providing power.
2. signal detection interface circuit as described in claim 1, which is characterized in that it includes first brilliant that the power, which provides circuit,
Body pipe and second transistor, the first transistor connection power supply and the detection switching circuit, the second transistor connection
One detection enable end, the detection enable end makes the second transistor on or off.
3. signal detection interface circuit as claimed in claim 2, which is characterized in that the first transistor is three pole of positive-negative-positive
Pipe, the second transistor is NPN type triode, and the base stage of the first transistor connects the current collection of the second transistor
Pole, the emitter of the first transistor connect power supply, and the collector of the first transistor connects first module；It is described
The base stage of second transistor connects the detection enable end, the emitter ground connection of the second transistor.
4. signal detection interface circuit as claimed in claim 3, which is characterized in that the base stage and transmitting of the first transistor
A resistance is bridged between pole, and there is a resistance between the base stage of the first transistor and the collector of the second transistor,
A resistance is bridged between the base stage and emitter of the second transistor, the base stage of the second transistor and the detection are enabled
There is a resistance between end.
5. signal detection interface circuit as claimed in claim 3, which is characterized in that it further includes one or two that the power, which provides circuit,
Pole pipe, the cathode of the diode connect the emitter of the first transistor, and the anode of the diode connects power supply.
6. signal detection interface circuit as claimed in claim 3, which is characterized in that first module includes first resistor,
One end of the first resistor connects the collector of the first transistor, and the other end connects the current sensor or the electricity
Pressure sensor, in which:
When the detection switching circuit connects the current sensor, the resistance value of the first resistor is 200 ohm~400 Europe
Nurse；
When the detection switching circuit connects the voltage sensor, the resistance value of the first resistor is 800 ohm~1500
Ohm.
7. signal detection interface circuit as claimed in claim 6, which is characterized in that second module includes third crystal
Pipe, second resistance and 3rd resistor, the third transistor are PNP type triode, and first module is passed according to the electric current
The detection signal of sensor controls the on or off of the third transistor, described point of the collector connection of the third transistor
Volt circuit, the emitter of the third transistor connect the power and provide circuit, the second resistance and the 3rd resistor
One end is all connected with the base stage of the third transistor, and the other end is connected to the both ends of the first resistor, first electricity
Resistance and the 3rd resistor connecting pin are also connected with the emitter of the third transistor.
8. signal detection interface circuit as claimed in claim 7, which is characterized in that the third module includes the 4th resistance,
The resistance value of 4th resistance is less than 0.05 ohm, and the collector of one end connection third transistor of the 4th resistance is another
End connects the connecting pin of the first resistor and the second resistance.
9. signal detection interface circuit as claimed in claim 7, which is characterized in that the bleeder circuit include the 5th resistance and
6th resistance, described 5th resistance one end connect the collector of the third transistor, and the other end connects the controller, described
6th resistance one end connects the controller, other end ground connection.
10. signal detection interface circuit as described in claim 1, which is characterized in that the signal detection interface circuit also wraps
Diagnostic circuit is included, for the diagnostic circuit when the detection switching circuit connects current sensor, detection is shorted failure over the ground.
11. signal detection interface circuit as claimed in claim 10, which is characterized in that the diagnostic circuit includes the 4th crystal
Pipe, the 5th transistor and clamp circuit, in which:
4th transistor is PNP type triode, and the 5th transistor is NPN type triode, the 4th transistor
Emitter connects the current sensor or the voltage sensor, and the base stage of the 4th transistor connects the 5th crystal
The collector of pipe, the collector of the 4th transistor connect the clamp circuit, and the emitter of the 5th transistor is grounded,
The one diagnosis enable end of base stage connection of 5th transistor, the diagnosis enable end makes the 5th transistor turns or pass
It is disconnected.
12. signal detection interface circuit as claimed in claim 11, which is characterized in that the base stage and hair of the 4th transistor
A resistance is bridged between emitter-base bandgap grading, and there is an electricity between the base stage of the 4th transistor and the collector of the 5th transistor
Resistance bridges a resistance, the base stage and the diagnosis of the 5th transistor between the base stage and emitter of the 5th transistor
There is a resistance between enable end.
13. signal detection interface circuit as claimed in claim 11, which is characterized in that the clamp circuit includes the 7th resistance
With the 8th resistance, described 7th resistance one end connects the collector of the 4th transistor, and the other end connects the controller, institute
It states the 8th resistance one end and connects the controller, other end ground connection.
14. signal detection interface circuit as claimed in claim 13, which is characterized in that the clamp circuit further includes the 9th electricity
Resistance and first capacitor, the 9th resistance and first capacitor form filter circuit, the 9th resistance one end connection the described 7th
Resistance and the 8th resistance, the other end connect the controller, and described first capacitor one end connects the controller, the other end
Ground connection.
15. a kind of signal detection interface system, which is characterized in that the signal detection interface system includes signal detection interface electricity
Road, controller, sensor, in which:
The signal detection interface circuit is connected between the controller and the sensor, the signal detection interface circuit
Processing is carried out to the detection signal of the sensor and forms an interface signal, the signal detection interface circuit believes the interface
Number it is provided to the controller；
The signal detection interface circuit includes detection switching circuit, power offer circuit and bleeder circuit, the detection switching
Sensor described in circuit connection, the detection switching circuit include the first module, the second module and third module；
When the sensor is a current sensor, first module and second module are effective, first module
The on or off of second module is controlled according to the detection signal of the current sensor, second module is connected to institute
It states power to provide between circuit and the bleeder circuit, the turn-on and turn-off of second module control the power and provide circuit
The case where providing power to the bleeder circuit, the bleeder circuit form electric current according to the on or off of second module
Interface signal；
When the sensor is a voltage sensor, first module and the third module are effective, and the power provides
Circuit connects the bleeder circuit with the third module by first module, and first module is passed according to the voltage
The detection signal of sensor controls the power and provides the case where circuit provides power to the bleeder circuit, the bleeder circuit root
According to formation voltage interface signal the case where providing power.
16. signal detection interface system as claimed in claim 15, which is characterized in that the current sensor is according to tested pair
Pictograph includes the 6th transistor and current source at the first measured signal, the current sensor, and the 6th transistor is NPN type
The base stage of triode, the 6th transistor is controlled by first measured signal, and the collector of the 6th transistor connects
Connect the current source, the emitter ground connection of the 6th transistor.
17. signal detection interface system as claimed in claim 15, which is characterized in that the voltage sensor is according to tested pair
Pictograph includes the 7th transistor at the second measured signal, the voltage sensor, and the 7th transistor is NPN type triode,
The base stage of 7th transistor is controlled by second measured signal, and the collector of the 7th transistor connects the letter
Number detection interface circuit, the emitter ground connection of the 7th transistor.
18. a kind of signal detecting method, which is characterized in that the signal detecting method includes:
Signal detection interface circuit carries out processing to the detection signal of sensor and forms an interface signal, the signal detection interface
The interface signal is provided to controller by circuit；
When the sensor is a current sensor, the first module and the second module are effective, and first module is according to
The detection signal of current sensor controls the on or off of second module, and second module is connected to power and provides electricity
Between road and bleeder circuit, the turn-on and turn-off of second module control the power offer circuit and mention to the bleeder circuit
The case where for power, the bleeder circuit form current interface signal according to the on or off of second module；
When the sensor is a voltage sensor, first module and third module are effective, and the power provides circuit
The bleeder circuit is connected with the third module by first module, first module is according to the voltage sensor
Detection signal control the power the case where circuit provides power to the bleeder circuit be provided, the bleeder circuit is according to mentioning
The case where for power, forms voltage interface signal.
19. signal detecting method as claimed in claim 18, which is characterized in that first module effectively includes: the first electricity
There is electric current to flow through in resistance.
20. signal detecting method as claimed in claim 18, which is characterized in that second module effectively includes: third crystalline substance
There is electric current to flow through in body pipe, second resistance and 3rd resistor.
21. signal detecting method as claimed in claim 18, which is characterized in that the third module effectively includes: the 4th electricity
There is electric current to flow through in resistance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557659.0A CN109240255A (en) | 2017-07-10 | 2017-07-10 | Signal detection interface circuit, system and signal detecting method |
| PCT/CN2018/086294 WO2019011049A1 (en) | 2017-07-10 | 2018-05-10 | Signal detection interface circuit and system, and signal detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557659.0A CN109240255A (en) | 2017-07-10 | 2017-07-10 | Signal detection interface circuit, system and signal detecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109240255A true CN109240255A (en) | 2019-01-18 |
Family
ID=65001542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710557659.0A Pending CN109240255A (en) | 2017-07-10 | 2017-07-10 | Signal detection interface circuit, system and signal detecting method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109240255A (en) |
| WO (1) | WO2019011049A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764367A (en) * | 2020-12-08 | 2021-05-07 | 清华大学 | Universal sensor signal acquisition circuit topological structure and use method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369403A (en) * | 2001-06-11 | 2002-12-20 | Denso Corp | Power generation controller for vehicle |
| CN102426066A (en) * | 2011-09-26 | 2012-04-25 | 天津成科自动化工程技术有限公司 | Switching detection circuit using multi-channel PT100 thermistors as temperature sensor |
| CN103884265A (en) * | 2014-03-27 | 2014-06-25 | 吴江绿控电控科技有限公司 | Displacement sensor fault detection circuit and control system thereof |
| CN106335452A (en) * | 2016-09-19 | 2017-01-18 | 中国北方车辆研究所 | General vehicle equipment analog signal acquisition and processing system |
| CN207115179U (en) * | 2017-07-10 | 2018-03-16 | 联合汽车电子有限公司 | Signal detection interface circuit and signal detection interface system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8073991B2 (en) * | 2010-01-14 | 2011-12-06 | General Electric Company | Isolated HART interface with programmable data flow |
| CN203274782U (en) * | 2013-02-28 | 2013-11-06 | 中国软件与技术服务股份有限公司 | General detection interface device |
| CN203968106U (en) * | 2014-07-10 | 2014-11-26 | 上海知津信息科技有限公司 | A kind of circuit of realizing multiple industry control message interface type on single face |
| CN104199618A (en) * | 2014-07-25 | 2014-12-10 | 广东长天思源环保科技股份有限公司 | Universal data collecting interface board |
-
2017
- 2017-07-10 CN CN201710557659.0A patent/CN109240255A/en active Pending
-
2018
- 2018-05-10 WO PCT/CN2018/086294 patent/WO2019011049A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369403A (en) * | 2001-06-11 | 2002-12-20 | Denso Corp | Power generation controller for vehicle |
| CN102426066A (en) * | 2011-09-26 | 2012-04-25 | 天津成科自动化工程技术有限公司 | Switching detection circuit using multi-channel PT100 thermistors as temperature sensor |
| CN103884265A (en) * | 2014-03-27 | 2014-06-25 | 吴江绿控电控科技有限公司 | Displacement sensor fault detection circuit and control system thereof |
| CN106335452A (en) * | 2016-09-19 | 2017-01-18 | 中国北方车辆研究所 | General vehicle equipment analog signal acquisition and processing system |
| CN207115179U (en) * | 2017-07-10 | 2018-03-16 | 联合汽车电子有限公司 | Signal detection interface circuit and signal detection interface system |
Non-Patent Citations (1)
| Title |
|---|
| 杨杰, 刘继东, 毕宏彦: "基于PSD的单片机数据采集系统设计", 广东工业大学学报, no. 03 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764367A (en) * | 2020-12-08 | 2021-05-07 | 清华大学 | Universal sensor signal acquisition circuit topological structure and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019011049A1 (en) | 2019-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207115179U (en) | Signal detection interface circuit and signal detection interface system | |
| CN107643447A (en) | A kind of vehicle insulation detecting circuit and method | |
| CN208367144U (en) | connection state diagnostic circuit and vehicle | |
| CN203929959U (en) | A kind of antenna of on-vehicle positioning terminal is opened short-circuit detecting device | |
| CN109240255A (en) | Signal detection interface circuit, system and signal detecting method | |
| CN204903740U (en) | Power detecting circuit | |
| CN104044464B (en) | A kind of sensor power output protection isolation circuit | |
| CN105973274A (en) | Signal detection circuit and apparatus thereof | |
| CN205608125U (en) | Route detection circuitry and detection device | |
| CN107965570A (en) | AT selectors solenoid valve control and diagnosis protection circuit | |
| CN104237702A (en) | Automobile bonding point detecting device and automobile bonding point detecting method | |
| CN106199458A (en) | A kind of power sense circuit | |
| CN208190980U (en) | A kind of car light monitoring circuit | |
| CN207395833U (en) | For the tamper detection circuit of valve control device metering platelet | |
| CN207408568U (en) | A kind of car power supply voltage detection circuit of tape light | |
| CN107317316B (en) | The protection circuit of port is detected for hot plug | |
| CN103575467B (en) | Detection harness for electronic oil pressure sensor of engine | |
| CN206930957U (en) | One kind interlocking detection circuit and automobile | |
| CN210536663U (en) | Multifunctional network detection system | |
| CN109683508A (en) | A kind of band detects and the steering handwheel control system of the online self-test of BIT automatically | |
| CN205916027U (en) | Failure diagnosis circuit of vehicle and indicator | |
| CN105403756B (en) | A kind of circuit arrangement with ground wire electrification detection function | |
| CN202230151U (en) | Intelligent gear shifter detection device | |
| CN106291167A (en) | A kind of one takes a functional safety digital quantity input module adding diagnosis | |
| CN210351204U (en) | Multifunctional network detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |