CN208325119U - A kind of bus control circuit, mobile unit and onboard system - Google Patents
A kind of bus control circuit, mobile unit and onboard system Download PDFInfo
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- CN208325119U CN208325119U CN201820387177.5U CN201820387177U CN208325119U CN 208325119 U CN208325119 U CN 208325119U CN 201820387177 U CN201820387177 U CN 201820387177U CN 208325119 U CN208325119 U CN 208325119U
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Abstract
The utility model provides a kind of bus control circuit, mobile unit and onboard system, is related to electronic technology field.The utility model embodiment can control the power module in mobile unit.The bus control circuit includes switch unit, first control unit, in which: the first signal wire in the first input end connection bus of switch unit, the second input terminal connect the second signal line in bus；First output end of switch unit is connect with DC power supply, the input terminal connection of second output terminal and first control unit；Switch unit is used for according to the voltage signal exported between the first signal wire and second signal line, and the second output terminal of the first output end and switch unit of control switch unit is turned on or off.The output end of first control unit and the control terminal of power module connect；The output end that first control unit is used to control first control unit exports high level or low level to the control terminal of power module.The utility model is applied to power supply of the control to slave.
Description
Technical field
The embodiments of the present invention are related to electronic technology field more particularly to a kind of bus control circuit, mobile unit
And onboard system.
Background technique
Currently, various mobile units are more and more with the development of automotive engineering.For the ease of the behaviour of various mobile units
Make, mostly uses the form of host and slave in the onboard system of the prior art to control mobile unit.Specifically as shown in Figure 1, making
Signal transmitting, slave are carried out with as the control module in the mobile unit of slave by BUS bus for the mobile unit of host
In control module receive host transmission control signal after, control slave complete corresponding operating.
In this regard, inventors have found that since the bus in the prior art between host and slave is only used for the biography of control signal
It passs without providing power supply signal, and slave is needed through the load in independent electric power source pair of module slave including control module
It is powered, therefore can not be in such a way that host computer bus sends control signal to slave, confession to slave power module
Electric process is controlled.
Utility model content
The embodiments of the present invention provide a kind of bus control circuit, mobile unit and onboard system, for controlling pair
Mobile unit power supply.
In a first aspect, the utility model provides a kind of bus control circuit, which is applied to onboard system
In, onboard system includes at least two mobile units, wherein the first mobile unit is connect by bus with the second mobile unit；Always
Line control circuit includes: switch unit, first control unit, in which: the in the first input end of switch unit connection bus
One signal wire, the second input terminal connect the second signal line in bus, and the first output end is connect with DC power supply, second output terminal
It is connect with the input terminal of first control unit；Switch unit is used for according to the first mobile unit to the first signal wire of bus and the
The voltage signal exported between binary signal line, the second output terminal of the first output end and switch unit of control switch unit are led
On-off is opened；The output end of first control unit and the control terminal of power module connect；First control unit is used in the first control
When the input terminal of unit processed is connected with DC power supply, the output end for controlling first control unit is exported to the control terminal of power module
High level, so that load supplying of the power module to the second mobile unit；First control unit is also used to first control unit
When input terminal and DC power supply disconnect, the output end for controlling first control unit exports low level to the control terminal of power module,
So that power module stops the load supplying to the second mobile unit.
Optionally, switch unit includes photoelectrical coupler；The of the first input end connection switch unit of photoelectrical coupler
One input terminal, the second input terminal of the second input terminal connection switch unit, the first of collector output connection switch unit are defeated
Outlet, the second output terminal of emitter output end connection switch unit.
Optionally, switch unit further include: first resistor, second resistance, the first zener diode, first capacitor, in which:
The first input end of photoelectrical coupler is connected to the first input end of switch unit by first resistor, the first zener diode,
Wherein the first input end of photoelectrical coupler connects the cathode of the first zener diode, the first zener diode by first resistor
Anode connection switch unit first input end；One end of second resistance connects between first resistor, the first zener diode,
Second input terminal of other end connection photoelectrical coupler；First capacitor one end connection first resistor, the first zener diode it
Between, the other end connects the second input terminal of photoelectrical coupler.
Optionally, first control unit includes: the first NPN type triode, PNP type triode, the second zener diode,
In: the input terminal of the base stage connection first control unit of the first NPN type triode, collector connect DC power supply, and emitter connects
Ground；The base stage of PNP type triode connects the collector of the first NPN type triode, and emitter connects DC power supply, collector connection
The output end of first control unit；The base stage of the cathode connection PNP type triode of second zener diode, plus earth.
Optionally, first control unit further include: 3rd resistor, the 4th resistance, the 5th resistance, diode, in which: third
One end of resistance connects the base stage of the first NPN type triode, other end ground connection；4th resistance is connected to DC power supply and first
Between the collector of NPN type triode, so that the collector of the first NPN type triode connects DC power supply by the 4th resistance；
The collector of one end connection PNP type triode of 5th resistance, other end ground connection；The anode of diode connects PNP type triode
Collector, diode cathode connection first control unit output end so that the collector of PNP type triode pass through two
The output end of pole pipe connection first control unit.
Optionally, bus control circuit further include: thermistor, in which: first control unit is connected by thermistor
The control terminal of power module.
Optionally, bus control circuit further include: the second control unit；The input terminal of second control unit connects power supply mould
The control terminal of block, the output end of the second control unit connects the control module of the second mobile unit, wherein the second mobile unit is logical
The control module for crossing the second mobile unit is connect with bus；Second control unit is used for the high electricity of control terminal output when power module
Usually, the output end for controlling the second control unit exports low level to control module, so that control module is receiving low level
Feedback signal is sent to the first mobile unit by bus afterwards, the first mobile unit controls the first vehicle after receiving feedback signal
The voltage carried between the first output end of equipment and the second output terminal of the first mobile unit is more than or equal to voltage threshold.
Optionally, the second control unit includes: third zener diode, the second NPN type triode, in which: third pressure stabilizing
The cathode of diode connects the input terminal of the second control unit, and anode connects the base stage of the second NPN type triode；Second NPN type
The collector of triode connects the output end of the second control unit, the emitter ground connection of the second NPN type triode.
Optionally, the second control unit further include: the 6th resistance, the 7th resistance, the second capacitor, in which: the 6th resistance
One end connects the base stage of the second NPN type triode, other end ground connection；One end of 7th resistance connects the input of the second control unit
End, other end ground connection；One end of second capacitor connects the input terminal of the second control unit, other end ground connection.
Second aspect, the utility model provide a kind of mobile unit, including bus marco provided by above-mentioned first aspect
Circuit.
The third aspect, the utility model provides a kind of onboard system, including at least two mobile units, wherein first is vehicle-mounted
Equipment connects the second mobile unit by bus, and the onboard system further includes the bus marco as provided by above-mentioned first aspect
Circuit.
In bus control circuit provided by the utility model, equipment and system, switch unit is passing through the first of bus
After signal wire and second signal line receive the voltage signal between the first output end of the first mobile unit and second output terminal,
Can be by the on-off of voltage signal control switch two output ends of unit, and then make first control unit to power module
Control terminal output control signal, controls power supply of the power module to the second mobile unit.To realize the first mobile unit benefit
Control with bus to the power supply of the second mobile unit.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or the prior art will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram for onboard system that the prior art provides；
Fig. 2 is a kind of structural schematic diagram for onboard system that the embodiments of the present invention provide；
Fig. 3 is a kind of structural schematic diagram for onboard system that the embodiments of the present invention provide；
Fig. 4 is a kind of structural schematic diagram for onboard system that the embodiments of the present invention provide.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Term " first " and " second " in the specification and claims of the utility model etc. are for distinguishing difference
Object, rather than be used for description object particular order.For example, first resistor and second resistance etc. are different for distinguishing
Antenna, rather than the particular order for describing antenna.
In the utility model embodiment, " illustrative " or " such as " etc. words for indicate make example, illustration or say
It is bright.Be described as in the utility model embodiment " illustrative " or " such as " any embodiment or design scheme should not be by
It is construed to than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.In addition, in the description of the utility model embodiment, unless otherwise saying
Bright, the meaning of " plurality " is refer to two or more.
The utility model passes through two signal wires in the bus and the power module for powering to the second mobile unit
Control terminal between connect a bus control circuit, and then when the first mobile unit is to this two signal wire output voltage signals
When, bus control circuit can be believed according to the voltage signal to the control terminal transmission level of the power module of the second mobile unit
Number, to control the operation of power module.To realize that the first mobile unit passes through the effect that the second mobile unit of bus marco is powered
Fruit.
In order to realize that above-mentioned technical effect, the embodiments of the present invention provide a kind of bus control circuit, such as Fig. 2 institute
Show, bus control circuit 10 is applied in onboard system, and onboard system includes at least two mobile units, wherein first vehicle-mounted sets
It is standby to be connect by bus with the second mobile unit.Wherein, the first mobile unit can be the host in onboard system, and second is vehicle-mounted
Equipment can be the slave in onboard system.
The bus control circuit 10 includes switch unit 101 and first control unit 102.Wherein:
The first signal wire in the first input end A connection bus of switch unit 101, in the second input terminal B connection bus
Second signal line.First output end C of switch unit 101 is connect with DC power supply VCC, the control of second output terminal D and first
The input terminal E connection of unit 102.
In one embodiment, as shown in Fig. 2, including control module 301 in the second mobile unit, bus passes through connection control
Molding block 301 is connect with the second mobile unit 30.
Switch unit 101 is used for according to the first mobile unit 20 to defeated between the first signal wire and second signal line of bus
Voltage signal out, the second output terminal B's of the first output terminals A and switch unit of control switch unit is turned on or off.
The output end F of first control unit 102 is connect with the control terminal of power module 302；
First control unit 102 is used for when the input terminal E of first control unit 102 is connect with DC power supply VCC, control
The output end F of first control unit 102 processed exports high level to the control terminal of power module 302, so that power module 302 is to the
The load supplying of two mobile units 30；First control unit 102 is also used to input terminal E and direct current in first control unit 102
When power supply VCC is disconnected, the output end F for controlling first control unit 102 exports low level to the control terminal of power module 302, with
Power module 302 is set to stop the load supplying to the second mobile unit.
It should be noted that power module 302 can be built in the second mobile unit 30 in the utility model, it can also
To be independently of the autonomous device of the second mobile unit 30, in the utility model with no restriction to this.
Bus control circuit provided by the utility model and equipment, switch unit 101 is in the first signal for passing through bus
It, can after line and second signal line receive the voltage signal between the first output end of the first mobile unit and second output terminal
By the on-off of voltage signal control switch two output ends of unit, and then make control of the first control unit to power module
End output control signal, to control power supply of the power module to the second mobile unit.To realize the utilization of the first mobile unit
Control of the bus to the power supply of the second mobile unit.
In one embodiment, as shown in figure 3, in bus control circuit provided by the utility model embodiment, switch
Unit 101 includes photoelectrical coupler TC1, in which:
The first input end A of the first input end connection switch unit 101 of photoelectrical coupler TC1, the connection of the second input terminal
Second input terminal B of switch unit 101, the first output end C of collector output connection switch unit 101, emitter output
Hold the second output terminal D of connection switch unit 101.
It is default when existing between the first input end and the second input terminal of switch unit 101 in the utility model embodiment
When voltage difference, the LEDs ON in photoelectrical coupler shines, and then the both ends of photistor are connected；When switch is single
Light emitting diode when predeterminated voltage difference being not present between the first input end and the second input terminal of member 101, in photoelectrical coupler
It does not shine, the both ends of photistor are not turned on, and then are realized when there are predeterminated voltages between the first signal and second signal
When poor, the first output end of control switch unit 101 is connected with second output terminal；When between the first signal wire and second signal line
When Non-precondition voltage difference, 101 first output end of switch unit and second output terminal open circuit are flat.
In one embodiment, as shown in figure 3, switch unit 101 in the utility model embodiment further include: first
Resistance R1, second resistance R2, the first zener diode ZD1, first capacitor C1, in which:
The first input end of photoelectrical coupler TC1 is connected to switch by first resistor R1, the first zener diode ZD1
The first input end A of unit 101, wherein the first input end of photoelectrical coupler TC1 passes through the first pressure stabilizing of first resistor R1 connection
The cathode of diode ZD1, the first input end A of the anode connection switch unit 101 of the first zener diode ZD1；
Between one end connection first resistor R1, the first zener diode ZD1 of second resistance R2, the other end connects photoelectricity coupling
The second input terminal of clutch TC1；
Between one end connection first resistor R1, the first zener diode ZD1 of first capacitor C1, the other end connects photoelectricity coupling
The second input terminal of clutch TC1.
In one embodiment, first control unit 102 in the utility model embodiment, specifically includes: the first NPN type three
Pole pipe Q1, PNP type triode Q2, in which:
The input terminal E of the base stage connection first control unit of first NPN type triode Q1, collector connect DC power supply
VCC, emitter ground connection.
The base stage of PNP type triode Q2 connects the collector of the first NPN type triode Q1, and emitter connects DC power supply
VCC, collector connect the output end F of first control unit.
The base stage of the cathode connection PNP type triode Q2 of second zener diode ZD2, plus earth.
In the utility model embodiment, by the way that the base stage of the first NPN type triode Q1 is connected the defeated of first control unit
Enter end, collector connection DC power supply VCC, emitter ground connection, the base stage of PNP type triode Q2 connects the first NPN type triode
The collector of Q1, emitter connect DC power supply VCC, and collector connects the output end F of first control unit, in addition positive-negative-positive three
The base stage of pole pipe also passes through the second zener diode ZD2 ground connection.And then when the first output end C and second of switch unit 101 is defeated
Outlet D is connected, after the input terminal E connection DC power supply VCC of first control unit 102, the collector of the first NPN type triode
It is connected with emitter, and then the collector for triggering PNP type triode is connected with emitter, to make the output of first control unit
F is held to export high level.When switch unit 101 the first output end C and second output terminal D disconnect, first control unit 102
After input terminal E and DC power supply VCC is disconnected, and then close Q1, Q2, and then the output end F output of first control unit is low
Level.Realize the control to power module.
Further, as shown in figure 3, in one embodiment, first control unit 102 further include: 3rd resistor R3,
Four resistance R4, the 5th resistance R5, diode D1, in which:
One end of 3rd resistor R3 connects the base stage of the first NPN type triode Q1, other end ground connection.
4th resistance R4 is connected between DC power supply VCC and the collector of the first NPN type triode Q1 so that first
The collector of NPN type triode Q1 passes through the 4th resistance R4 connection DC power supply VCC.
The collector of one end connection PNP type triode Q2 of 5th resistance R5, other end ground connection.
The first control of cathode connection of the collector of the anode connection PNP type triode Q2 of diode D1, diode D1 is single
The output end F of member, so that the collector of PNP type triode Q2 passes through the output end F of diode D1 connection first control unit.
In one embodiment, as shown in figure 3, in the utility model embodiment, bus control circuit further include: temperature-sensitive electricity
Hinder TH1, in which:
First control unit 102 passes through the control terminal of thermistor TH1 connection power module 302.
In another embodiment, as shown in figure 4, bus control circuit 10 provided by the utility model embodiment also wraps
It includes: the second control unit 103, in which:
The control terminal of the input terminal G connection power module 302 of second control unit 103, the output of the second control unit 103
The control module 301 of the second mobile unit 30 of end connection, wherein the control module 301 that the second mobile unit 30 passes through connects always
Line；
Second control unit 103 is used to control the second control unit when the control terminal of power module 302 exports high level
103 output end exports low level to control module.
In the embodiments of the present invention, by being connected between the control terminal of power module 302 and control module 301
First control unit 103, can when power module operation occur it is abnormal, when the control terminal output voltage of power module, by the
Two control units 103 export low level to control module 301, total by BUS so that control module is after receiving the low level
For line to the first mobile unit feedback information, the first mobile unit passes through the first signal wire of BUS bus after by feedback signal
It is closed with the first output end and second output terminal of second signal line control switch unit, and then power module is made to stop the second vehicle
Carry the load supplying of equipment.
In one embodiment, as shown in figure 3, the second control unit 103 includes: third zener diode ZD3, second
NPN type triode Q3, in which:
The cathode of third zener diode ZD3 connects the input terminal G of the second control unit, and anode connects the second NPN type three
The base stage of pole pipe Q3；
The collector of second NPN type triode Q3 connects the output end H, the second NPN type triode Q3 of the second control unit
Emitter ground connection.
In the utility model embodiment, when the control terminal output voltage of power module 302, third zener diode at this time
The partial pressure of Q3 is higher than its burning voltage, so that third zener diode is connected, and then triggers the collector of the second NPN type triode
Be connected with emitter, make the output end of the second control unit to control module 301 export low level, so as to control module 301 to
First mobile unit 20, which sends feedback signal, makes the first mobile unit 20 control power module stop power supply.
In one embodiment, as shown in figure 3, in bus control circuit provided by the utility model, the second control is single
Member further include: the 6th resistance R6, the 7th resistance R7, the second capacitor C2, in which:
One end of 6th resistance R6 connects the base stage of the second NPN type triode Q3, other end ground connection；
One end of 7th resistance R7 connects the input terminal G of the second control unit, other end ground connection；
One end of second capacitor C2 connects the input terminal G of the second control unit, other end ground connection.
Further, below in conjunction with the principle of above-mentioned bus control circuit, to the worked of the bus control circuit in Fig. 3
Journey is illustrated:
Firstly, first mobile unit 20 exports high to the first signal wire when needing to control the starting of the second mobile unit 30
Level makes to load preset voltage value between the first signal wire and second signal line.And then the photoelectricity coupling in trigger switch unit 101
First output end C of clutch is connected with second output terminal D, and the base voltage of the first NPN type triode is raised, triggering first
The collector of NPN type triode is connected with emitter, and then drags down the base voltage of PNP type triode Q2, so that the transmitting of Q2
Pole is connected with collector, so that high level is exported to the control terminal of power module 302 by diode D1, thermistor TH1,
So that power module 302 brings into operation and to the load supplying of the second mobile unit 30.
Later, when needing to close the second mobile unit power supply, the first mobile unit 20 exports low electricity to the first signal wire
It is flat, and then the first output end C and second output terminal D of switch unit 101 are disconnected, and then the base stage of Q1 is dragged down so that Q1 is closed
It closes, the voltage of voltage regulation that the base voltage of Q2 is pulled to the second zener diode ZD2 at this time closes Q2, and then to power supply mould
The control terminal of block 302 exports low level, so that power module 302 stops the load supplying to the second mobile unit 30.
In addition, when power module run there is output voltage abnormal and reversed from control terminal when, two pole of third pressure stabilizing at this time
The partial pressure of pipe Q3 is higher than its burning voltage, so that third zener diode is connected, and then draws high the base voltage of Q3, triggers Q3's
Collector is connected with emitter, so that the output end of the second control unit is exported low level to control module 301, so as to control module
301, which send feedback signal to the first mobile unit 20, makes the first mobile unit control power module stop power supply.
It should be noted that the elements such as included resistance, capacitor, diode, triode can in the utility model embodiment
To be an individual function element, the realization that can also be combined by multiple function element by mode in series or in parallel
The circuit of its function to be realized.For example, resistance can be by the resistance with predetermined resistance value Lai real in the utility model
It is existing, it can also be connected by multiple resistance by mode in series or in parallel and form a resistance unit, in this utility model
With no restrictions.
In one embodiment, the utility model also provides a kind of mobile unit, including provided by above-described embodiment always
Line control circuit.
In another embodiment, the utility model also provides a kind of onboard system, including vehicle-mounted sets including at least two
Standby, wherein the first mobile unit connects second mobile unit by bus, mobile unit further includes such as above-described embodiment institute
The bus control circuit of offer.
In addition, mobile unit provided by the embodiment of the utility model, onboard system include bus provided by the above embodiment
Control circuit, therefore, attainable beneficial effect can refer to having in corresponding bus control circuit presented above
Beneficial effect, details are not described herein again.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, the technical staff of this neighborhood can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, the technical solution of the utility model is substantially in other words to existing skill
The part that art contributes can be embodied in the form of software products, which is stored in a storage and is situated between
In matter (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the utility model.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, all any modifications on the basis of the technical solution of the utility model, made are equal
Replacement, improvement etc. should all include being within the protection scope of the utility model.
Claims (11)
1. a kind of bus control circuit, which is characterized in that the bus control circuit is applied in onboard system, the vehicle-mounted system
System includes at least two mobile units, wherein the first mobile unit is connect by bus with the second mobile unit；Total line traffic control
Circuit processed includes: switch unit, first control unit, in which:
The first input end of the switch unit connects the first signal wire in the bus, and the second input terminal connects the bus
In second signal line, the first output end connect with DC power supply, the input terminal of second output terminal and the first control unit
Connection；
The switch unit be used for according to the first signal wire from first mobile unit to the bus and second signal line it
Between the voltage signal that exports, control the conducting of the first output end of the switch unit and the second output terminal of the switch unit
Or it disconnects；
The output end of the first control unit and the control terminal of power module connect；
The first control unit is used for when the input terminal of the first control unit is connected with the DC power supply, controls institute
It states the output end of first control unit and exports high level to the control terminal of the power module, so that the power module is to described
The load supplying of second mobile unit；The first control unit is also used to the input terminal of the first control unit and described straight
When galvanic electricity source disconnects, the output end for controlling the first control unit exports low level to the control terminal of the power module, with
The power module is set to stop the load supplying to second mobile unit.
2. bus control circuit according to claim 1, which is characterized in that the switch unit includes photoelectrical coupler；
The first input end of the photoelectrical coupler connects the first input end of the switch unit, described in the connection of the second input terminal
Second input terminal of switch unit, collector output connect the first output end of the switch unit, and emitter output end connects
Connect the second output terminal of the switch unit.
3. bus control circuit according to claim 2, which is characterized in that the switch unit further include: first resistor,
Two resistance, the first zener diode, first capacitor, in which:
The first input end of the photoelectrical coupler is connected to described open by the first resistor, first zener diode
The first input end of unit is closed, wherein the first input end of the photoelectrical coupler passes through first resistor connection described first
The anode of the cathode of zener diode, first zener diode connects the first input end of the switch unit；
One end of the second resistance connects between the first resistor, first zener diode, described in other end connection
Second input terminal of photoelectrical coupler；
One end of the first capacitor connects between the first resistor, first zener diode, described in other end connection
Second input terminal of photoelectrical coupler.
4. bus control circuit according to claim 1, which is characterized in that the first control unit includes: the first NPN type
Triode, PNP type triode, the second zener diode, in which:
The base stage of first NPN type triode connects the input terminal of the first control unit, and collector connects the direct current
Power supply, emitter ground connection；
The base stage of the PNP type triode connects the collector of first NPN type triode, and emitter connects the direct current
Source, collector connect the output end of the first control unit；
The cathode of second zener diode connects the base stage of the PNP type triode, plus earth.
5. bus control circuit according to claim 4, which is characterized in that the first control unit further include: third electricity
Resistance, the 4th resistance, the 5th resistance, diode, in which:
One end of the 3rd resistor connects the base stage of first NPN type triode, other end ground connection；
4th resistance is connected between the DC power supply and the collector of first NPN type triode, so that described
The collector of first NPN type triode connects the DC power supply by the 4th resistance；
One end of 5th resistance connects the collector of the PNP type triode, other end ground connection；
The anode of the diode connects the collector of the PNP type triode, the cathode connection described first of the diode
The output end of control unit, so that the collector of the PNP type triode connects first control by the diode
The output end of unit.
6. bus control circuit according to claim 1, which is characterized in that the bus control circuit further include: temperature-sensitive electricity
Resistance, in which:
The first control unit connects the control terminal of the power module by the thermistor.
7. bus control circuit according to claim 1, which is characterized in that the bus control circuit further include: the second control
Unit processed；
The input terminal of second control unit connects the control terminal of the power module, the output end of second control unit
The control module of second mobile unit is connected, wherein second mobile unit passes through the control module and the bus
Connection；
Second control unit is used for when the control terminal of the power module exports high level, and it is single to control second control
The output end of member exports low level to the control module, so as to the control module after receiving low level by described total
Line sends feedback signal to first mobile unit, and first mobile unit controls institute after receiving the feedback signal
The voltage stated between the first output end of the first mobile unit and the second output terminal of first mobile unit is greater than or waits
In voltage threshold.
8. bus control circuit according to claim 7, which is characterized in that second control unit includes: third pressure stabilizing
Diode, the second NPN type triode, in which:
The cathode of the third zener diode connects the input terminal of second control unit, and anode connects the second NPN type three
The base stage of pole pipe；
The collector of second NPN type triode connects the output end of second control unit, three pole of the second NPN type
The emitter of pipe is grounded.
9. bus control circuit according to claim 8, which is characterized in that second control unit further include: the 6th electricity
Resistance, the 7th resistance, the second capacitor, in which:
One end of 6th resistance connects the base stage of second NPN type triode, other end ground connection；
One end of 7th resistance connects the input terminal of second control unit, other end ground connection；
One end of second capacitor connects the input terminal of second control unit, other end ground connection.
10. a kind of mobile unit, which is characterized in that the mobile unit includes total line traffic control of any one of the claims 1-9
Circuit processed.
11. a kind of onboard system, including at least two mobile units, wherein the first mobile unit connects described second by bus
Mobile unit, which is characterized in that the onboard system further includes the bus control circuit such as any one of the claims 1-9.
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| CN201820387177.5U CN208325119U (en) | 2018-03-21 | 2018-03-21 | A kind of bus control circuit, mobile unit and onboard system |
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| CN201820387177.5U CN208325119U (en) | 2018-03-21 | 2018-03-21 | A kind of bus control circuit, mobile unit and onboard system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474871A (en) * | 2019-01-23 | 2020-07-31 | 青岛海尔洗衣机有限公司 | Power supply control device and method of household appliance control system |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474871A (en) * | 2019-01-23 | 2020-07-31 | 青岛海尔洗衣机有限公司 | Power supply control device and method of household appliance control system |
| CN111474871B (en) * | 2019-01-23 | 2022-12-09 | 青岛海尔洗衣机有限公司 | Power supply control device and method of household appliance control system |
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