CN207585788U - A kind of temperature sensing cable assembly and circuit for detecting - Google Patents
A kind of temperature sensing cable assembly and circuit for detecting Download PDFInfo
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- CN207585788U CN207585788U CN201721770076.8U CN201721770076U CN207585788U CN 207585788 U CN207585788 U CN 207585788U CN 201721770076 U CN201721770076 U CN 201721770076U CN 207585788 U CN207585788 U CN 207585788U
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Abstract
The utility model is related to a kind of temperature sensing cable assembly and circuit for detecting, temperature sensing cable assembly includes the first sub- cable, the second sub- cable, flows to adapter circuit, first sub- cable, the second sub- cable are connected by a diode, and the head end connection of the first sub- cable flows to the end of adapter circuit；By applying different voltages to the head end for flowing to adapter circuit so that flow to adapter circuit and be selectively switched on, when it is connected, send out corresponding Continuity signal.By scheme provided by the utility model, the state that automobile ACC is opened and closed can be effectively distinguished, when ACC is closed, circuit can realize fire detection, when ACC is opened, also have the function of other fault detects, and quiescent dissipation is low, and reliability is high.
Description
Technical field
The utility model is related to a kind of temperature sensing cable more particularly to a kind of temperature sensing cable assemblies and circuit for detecting.
Background technology
Self-burning of vehicle Frequent Accidents at present, to solve the problems, such as self-burning of vehicle, some motor vehicle equipments are used using temperature sensing cable
In Multi-point detection fire, however existing temperature sensing cable fault monitoring circuit is mostly：A resistance is connect in temperature sensing cable electric terminals,
An electric signal is injected, and using the ADC ports sampled voltage of MCU to temperature sensing cable electric terminals, according to preset threshold value and ADC
The numerical value of port sampling compares failure judgement or fire alarm.This circuit is applied to car key cannot be distinguished under automobile scenarios
The state that ACC is opened or closed, quiescent current when causing the key ACC to close is excessive, and particularly multi-channel detection problem is more
Seriously, when the professional standard of 5mA or key ACC closings need to be less than about quiescent current by not meeting numerous car manufacturers
Fire can not be detected.In addition, existing temperature sensing cable detection circuit is applied to the work(that vehicle environment does not have various faults detection
Can, it is unsuitable for vehicle environment use.
Utility model content
The purpose of this utility model is to provide a kind of temperature sensing cable assembly and circuit for detecting, after the program so that
Automobile ACC can also normally detect fire and quiescent dissipation is low when closing, and ACC can not only detect fire when opening, can be with
Various faults are detected, reliability is high.
To achieve the above object, the first aspect of the utility model provides a kind of temperature sensing cable assembly, including：First son
Cable, the second sub- cable flow to adapter circuit, and the first sub- cable, the second sub- cable flow to adapter circuit and be respectively provided with head end and end
End；First sub- cable, the second sub- cable end connected by a diode, the head end of the first sub- cable connection flow direction adaptation electricity
The end on road；
It flows to adapter circuit and includes the first turning circuit parallel with one another, the second turning circuit；First turning circuit draws
Enter end and the exit of the second turning circuit collectively forms the head end for flowing to adapter circuit, the exit of the first turning circuit
The end for flowing to adapter circuit is collectively formed with the leading-in end of the second turning circuit；
When the head end potential for flowing to adapter circuit is higher than the head end potential of the second sub- cable, the conducting of the first turning circuit,
And send out the first Continuity signal；When the head end potential for flowing to adapter circuit is less than the head end potential of the second sub- cable, second leads
Circuit passband is connected, and sends out the second Continuity signal.
In a certain embodiment：The anode of the diode connects the second sub- cable, the cathode connection of the diode the
One sub- cable.
In a certain embodiment：First turning circuit includes the first photoelectrical coupler, and input terminal positive and negative electrode respectively constitutes
Leading-in end, the exit of first turning circuit；Second turning circuit includes the second photoelectrical coupler, and input terminal is positive and negative
Pole respectively constitutes leading-in end, the exit of second turning circuit；
First photoelectrical coupler, the second photoelectrical coupler input terminal conducting when, output terminal send out it is described first conducting
Signal, the second Continuity signal.
In a certain embodiment：A resistance in parallel between first turning circuit and the second turning circuit.
In a certain embodiment：First photoelectrical coupler, the second photoelectrical coupler output terminal emitter be all connected to GND
End, output terminal collector draws two connecting pins, wherein a connecting pin is connected to a positive pressure potential end by a resistance, separately
One connecting pin forms a signal output end, to send out first Continuity signal, the second Continuity signal.
In a certain embodiment：Further include the first temperature sensing cable extended line, the second temperature sensing cable extended line；
The head end of first sub- cable is connected to the end for flowing to adapter circuit, the second son by the first temperature sensing cable extended line
The head end of cable connects the second temperature sensing cable extended line；
A resistance and/or the second sub- cable and the second temperature-sensitive electricity are equipped between first sub- cable and the first temperature sensing cable extended line
A resistance is equipped between cable extended line.
In a certain embodiment：Further including definition has the first connector and the second connector of positive and negative electrode；
The head end of first sub- cable by the first temperature sensing cable extended line, the first connector, the second connector anode connect
Connect the end for flowing to adapter circuit；The head end of second sub- cable connects the first connector, the by the second temperature sensing cable extended line
The cathode of two connectors；
First connector, the second connector can be docked or be detached into male and female.
In a certain embodiment：A potential Comparison Circuit is further included, for comparing the potential of its head end and end；Potential ratio
The one end of second temperature sensing cable extended line far from the second sub- cable is connected to the head end of circuit, end connects the first temperature sensing cable
The one end of extended line far from the first sub- cable；
The potential Comparison Circuit includes switching circuit and coupled third turning circuit；Third turning circuit draws
Enter the head end of end connection potential Comparison Circuit, the end of the exit connection potential Comparison Circuit of third turning circuit；
When switching circuit is closed, and third turning circuit is connected, third turning circuit sends out third Continuity signal.
In a certain embodiment：The head end of potential Comparison Circuit and the second temperature sensing cable extended line are far from the second sub- cable
One end is commonly connected to GND ends, and the head end for flowing to adapter circuit is selectively applied in positive pressure potential or negative pressure potential.
In a certain embodiment：The third turning circuit includes third photoelectrical coupler, the positive and negative electrode point of input terminal
Leading-in end, the exit of the third turning circuit are not formed；
The output terminal emitter of third photoelectrical coupler is connected to GND ends, and output terminal collector draws two connecting pins,
A wherein connecting pin is connected to a positive pressure potential end by a resistance, and another connecting pin forms a signal output end, with defeated at its
When entering end conducting, the third Continuity signal is sent out.
In a certain embodiment：The switching circuit includes the 4th photoelectrical coupler, during output terminal triode ON, opens
Close closing of circuit；
The input anode of 4th photoelectrical coupler forms a closure signal input terminal, defeated to receive a control signal
Enter to hold cathode connection GND ends, the control signal controls the input terminal whether to be connected so as to control whether its output terminal is connected；
The head end of the output terminal collector connection potential Comparison Circuit of 4th photoelectrical coupler, the connection of output terminal emitter
The input anode of third photoelectrical coupler.
In a certain embodiment：It is set in the output terminal inter-collector of the head end and the 4th photoelectrical coupler of potential Comparison Circuit
There is a diode, the cathode of the diode connects the output terminal collector of the 4th photoelectrical coupler；
The input terminal of third photoelectrical coupler connects the head end of potential Comparison Circuit by a resistance, is gone back between positive and negative electrode
Another resistance in parallel；
The input anode of 4th photoelectrical coupler forms the closure signal input terminal by a resistance.
To achieve the above object, the second aspect of the utility model provides a kind of temperature sensing cable suitable for vehicle environment
Circuit for detecting, above-mentioned temperature sensing cable assembly, further includes：MCU module；
MCU module have 4 general purpose I/O ports for being set to input terminal, be respectively PA0/INT0 ends, PA1 ends,
PA2 ends, PB0/INT1 ends；The PA0/INT0 ends, PA1 ends, PA2 ends connect first photoelectrical coupler, the second photoelectricity respectively
The signal output end of coupler, third photoelectrical coupler, to receive each Continuity signal, MCU module is according to each conducting
The combination judgement temperature sensing cable state in which of signal；
The PA0/INT0 ends wake up port with outer interruption of the PB0/INT1 ends for MCU module, can be by being inputted to it
Suspend mode or wake-up MCU module after level signal；
First Continuity signal is level signal, and the PB0/INT1 end signals connect automobile ACC power supplys, ACC electricity
Source sends out level signal by a built-up circuit to it.
In a certain embodiment：When the first photoelectrical coupler input terminal is connected, the first Continuity signal is low level signal；
When the first photoelectrical coupler input terminal does not turn on, the first Continuity signal is high level signal；
When ACC electric power startings, ACC power supplys send out low level signal by the built-up circuit；When ACC power supplys are closed
When, ACC power supplys send out high level signal by the built-up circuit；
By to PA0/INT0 ends and PB0/INT1 ends input high level signal or low level signal can distinguish suspend mode or
Wake up MCU module.
In a certain embodiment：Second Continuity signal, third Continuity signal are level signal, when its corresponding each light
When electric coupler input terminal is connected, the second Continuity signal, third Continuity signal are low level signal；When its corresponding each photoelectricity coupling
When clutch input terminal does not turn on, the second Continuity signal, third Continuity signal are high level signal.
In a certain embodiment：The MCU module further includes a general purpose I/O port for being set to output terminal, is PA3
End, and the closure signal input terminal is connected, the closure signal is level signal；
When PA3 ends export low level, the output terminal triode of the 4th photoelectrical coupler is not turned on, and switching circuit disconnects；
When PA3 ends export high level, the output terminal triode ON of the 4th photoelectrical coupler, switching circuit breaks closure.
In a certain embodiment：Power supply circuit is further included, with potential output terminal and switching signal input terminal, the electricity
Gesture output terminal connects the head end for flowing to adapter circuit；MCU module further includes a general purpose I/O port for being set to output terminal,
For PA4 ends, and connect the switching signal input terminal；
The switching signal is level signal, when MCU setting PA4 ends output low level signal, the output of potential output terminal
Positive pressure potential；When MCU settings PA4 exports high level signal, potential output terminal output negative pressure potential.
In a certain embodiment：The power supply circuit includes power adapter circuit and positive and negative power switching circuit；
The power adapter circuit includes the first regulator circuit, the second regulator circuit, negative supply switch, negative pressure conversion electricity
Road；The input terminal of first regulator circuit is connected to automobile storage battery, for the 12V output voltages of automobile storage battery are converted to+
8V is exported, and output terminal draws three connecting pins, wherein two connecting pins are respectively connected to the second regulator circuit and negative pressure conversion electricity
The input terminal on road, another connecting pin form+8V an output terminals；Second regulator circuit and negative pressure conversion circuit are respectively used to first
The 8V output voltages of regulator circuit are converted to+5V outputs and -8V outputs, and output terminal is respectively formed+5V an output terminals and -8V is defeated
Outlet；+ 5V the output terminals form the positive pressure potential end；The negative pressure change-over switch signal connection ACC power supplys and MCU moulds
Block, when ACC power supplys are closed, negative pressure change-over switch is closed, and -8V the output terminals are closed, when the closing of ACC power supplys or MCU module
During wake-up, negative pressure change-over switch is opened；
The positive and negative power switching circuit is by P-channel field-effect transistor (PEFT) pipe Q100, the first driving electricity of driving FET Q100
Road, N-channel field-effect tube Q102, the second driving circuit of driving FET Q102, current-limiting resistance R102, current-limiting resistance
R103, diode D100, diode D101 compositions；
Source electrode connection+8V the output terminals of field-effect tube Q100, the anode of drain electrode connection diode D100, grid connection
First driving circuit；Source electrode connection -8V the output terminals of field-effect tube Q102, the cathode of drain electrode connection diode D101, grid
Pole connects the second driving circuit；One end of current-limiting resistance R102, R103 are connected, and the other end connects the cathode of diode D100 respectively
With the anode of D101；
First driving circuit includes phase inverter U102, resistance R100, triode Q101, resistance R101, and described second
Driving circuit includes resistance R105, photoelectrical coupler U101, resistance R104；The grid connection phase inverter U102 of field-effect tube Q100
Output terminal, the output terminal of the grid connection photoelectrical coupler U101 of field-effect tube Q102；
The collector of triode Q101 be connected to phase inverter U102 input terminal and by resistance R100 be connected to it is described+
5V output terminals, emitter connection GND ends, base stage are connected to one end of resistance R101；The output terminal of photoelectrical coupler U101 leads to
It crosses resistance R105 and is connected to -8V the output terminals, input terminal is connected to one end of resistance R104, and R101 and R104 is connected to institute
State switching signal input terminal；
When MCU settings are when PA4 ends export low level, field-effect tube Q100 conductings, Q102 is closed, positive and negative power switching electricity
Road direction flows to the head end offer+8V power supplies of adapter circuit；When PA4 exports high level, field-effect tube Q100 is closed, and Q102 is led
Logical, positive and negative power switching circuit is powered to the head end offer -8V of adapter circuit.
Compared to the prior art, the utility model has the advantage that：
(1) if fire occurs when ACC is closed, a low level signal can be generated, and pass through MCU module by flowing to adapter circuit
External interrupt wakeup port it is waken up under suspend mode, realize that the circuit of the utility model is effectively distinguished automobile ACC and beaten
The state that Push And Release closes, so as to which when ACC is closed, circuit can retain basic fire detection function, and quiescent dissipation is low, reliably
Property it is high；
(2) level logic is generated to MCU module using photoelectric coupled device, MCU module is sentenced by analyzing level logic
Disconnected temperature sensing cable is in fire or other failures, relative to the existing ADC module sampling temperature sensing cable voltage using microcontroller
Method for detecting judges that the reliability of result is high；And since photoelectrical coupler has stronger antijamming capability so that circuit for detecting
Whole stability greatly improves；
(3) temperature sensing cable is equipped with extended line, is additionally provided with pinboard between extended line and sub- cable so that in addition to sub- cable
Device may be mounted at the position far from usual ignition point, and by potential Comparison Circuit can effectively differentiate sub- cable short circuit or
Extended line short circuit；
(4) connector docked into male and female is equipped between extended line and the circuit of rear end so that the processing and connection of each circuit
Process is simplified, and facilitates the assembly and disassembly of circuit.
Description of the drawings
Fig. 1 shown in a preferred embodiment, the structure of temperature sensing cable assembly；
Fig. 2 shows in Fig. 1, when the head end for flowing to adapter circuit applies positive potential, and electric current stream during sub- cable short circuit
To schematic diagram；
Fig. 3 is shown in Fig. 1, when the head end for flowing to adapter circuit applies negative potential, and electric current stream during sub- cable short circuit
To schematic diagram；
Fig. 4 is shown in Fig. 1, when the head end for flowing to adapter circuit applies positive potential, and temperature sensing cable is normal, no current
Loop is formed；
Fig. 5 is shown in Fig. 1, when the head end for flowing to adapter circuit applies negative potential, and temperature sensing cable is normal, and temperature-sensitive
Current direction schematic diagram when cable is normal；
Fig. 6 shows the temperature sensing cable assembly for being connected with potential Comparison Circuit；
Fig. 7 shown in a preferred embodiment, the structure of power adapter circuit；
Fig. 8 shown in a preferred embodiment, the structure of positive and negative power switching circuit；
Fig. 9 shown in a preferred embodiment, the port configuration diagram of MCU module；
Figure 10 shown in a preferred embodiment, the structure and connection relation of temperature sensing cable circuit for detecting；
Figure 11 shown in a preferred embodiment, the structure of built-up circuit；
Figure 12 shown in a preferred embodiment, the detecting flow process figure of circuit for detecting；
Figure 13 shown in a preferred embodiment, the detection logic true value table of circuit for detecting.
Specific embodiment
Please also refer to Fig. 1, the utility model provides firstly a kind of temperature sensing cable assembly, including：First sub- cable L100,
Second sub- cable L200, adapter circuit is flowed to, the first sub- cable, the second sub- cable flow to adapter circuit and be respectively provided with head end and end
End.
First sub- cable, the second sub- cable are mutually parallel two elastic metallic conductors, between the two elastic metallics conductor
Equipped with fusible insulating materials barrier layer, Vicat softening point is optional within the temperature range of 40 DEG C~180 DEG C.In the present embodiment,
The mutually twisted winding of two elastic metallic conductors of barrier layer is set, and the external sheath layer has NTC or CTR characteristics and passes through
Extrusion molding or around-packing technology are sheathed on outside the elastic metallic conductor.Insulating materials barrier layer is heated at high temperature when a fire
So as to melt failure so that the first sub- cable and the second sub- cable connection short circuit.
In addition, the end of the first sub- cable L100, the second sub- cable L200 pass through a diode D001 connections, the present embodiment
In, the anode of the diode D001 connects the second sub- cable, and the cathode of the diode D001 connects the first sub- cable；It is described
The relatively low diode of the reverse phases leakage current such as rectifier diode or switching diode can be used in diode D001.
The head end connection of first sub- cable L100 flows to the end of adapter circuit, can be applied in positive potential or negative potential；This
Embodiment, the head end of the second sub- cable L200 are connected to GND ends.
It flows to adapter circuit and includes the first turning circuit parallel with one another, the second turning circuit；First turning circuit draws
Enter end and the exit of the second turning circuit collectively forms the head end for flowing to adapter circuit, the exit of the first turning circuit
The end for flowing to adapter circuit is collectively formed with the leading-in end of the second turning circuit.That is, the first turning circuit is led with second
Circuit passband reverse parallel connection.
When the head end potential for flowing to adapter circuit is higher than the head end potential of the second sub- cable L200, the first turning circuit is led
It is logical, and send out the first Continuity signal；When the head end potential for flowing to adapter circuit is less than the head end potential of the second sub- cable L200,
Second turning circuit is connected, and sends out the second Continuity signal.
In concrete structure, the first turning circuit includes the first photoelectrical coupler U200A, input terminal positive and negative electrode difference structure
Into leading-in end, the exit of first turning circuit；Second turning circuit includes the second photoelectrical coupler U200B, input
End positive and negative electrode respectively constitutes leading-in end, the exit of second turning circuit.Preferably, the first turning circuit is led with second
One resistance R201 of parallel connection between circuit passband.
First photoelectrical coupler U200A, the second photoelectrical coupler U200B output terminal emitter be all connected to GND ends,
Output terminal collector draws two connecting pins, wherein a connecting pin is connected to a positive pressure potential by a resistance R200 (R202)
End, another connecting pin forms a signal output end, to send out first Continuity signal, the second Continuity signal.
Then, Fig. 2-5 is please referred to.In Fig. 2, when the head end application positive potential for flowing to adapter circuit, and during sub- cable short circuit,
Electric current passes through the input terminal of the first photoelectrical coupler from the head end of adapter circuit, flows through the first sub- cable and the second sub- cable, with
After flow to GND ends.That is, the first photoelectrical coupler U200A is connected.Likewise, Fig. 3 is shown, when the head end for flowing to adapter circuit
Apply negative potential, and during sub- cable short circuit, the second photoelectrical coupler U200B conductings.Fig. 4 is shown as the head for flowing to adapter circuit
End applies positive potential, and when temperature sensing cable is normal, and no current loop is formed；Fig. 5 is shown, when the head end for flowing to adapter circuit applies
Negative potential, and when temperature sensing cable is normal, the second photoelectrical coupler U200B conductings.In addition, when open circuit occurs for temperature sensing cable, the
One photoelectrical coupler and the second photoelectrical coupler obviously do not turn on and (respective drawings are not shown).As a result, by measuring photoelectricity
Whether coupler is connected, you can differentiates temperature sensing cable state in which.
Preferably, in order to which the device in addition to sub- cable is made to may be mounted at the position far from usual ignition point, and have
Other corresponding detecting functions, temperature sensing cable assembly further includes the first temperature sensing cable extended line Y100, the second temperature sensing cable extends
Line Y200.
The head end of first sub- cable L100 is connected to the end for flowing to adapter circuit by the first temperature sensing cable extended line Y100
End, the head end of the second sub- cable L200 connect the second temperature sensing cable extended line Y200；First sub- cable prolongs with the first temperature sensing cable
It is equipped between a resistance R001 and/or the second sub- cable and the second temperature sensing cable extended line between long line and is equipped with a resistance, i.e., at least had
There is a resistance R002.
Preferably, further including definition has the first connector J100 and the second connector J200 of positive and negative electrode.First sub- cable
Head end by the first temperature sensing cable extended line, the first connector J100, the second connector J200 anode connection flow direction adaptation
The end of circuit；The head end of second sub- cable connects the first connector J100, the second connection by the second temperature sensing cable extended line
The cathode of device J200.First connector J100, the second connector J200 can be docked or be detached into male and female.
For realize it is above-mentioned there are other corresponding detecting functions, temperature sensing cable assembly further includes a potential Comparison Circuit, uses
In the potential for comparing its head end and end.The head end of potential Comparison Circuit connects the cathode of the second connector J200, i.e., the second sense
The one end of warm cable extension line far from the second sub- cable, end connect the cathode of the first connector J100, i.e. the first temperature-sensitive electricity
The one end of cable extended line far from the first sub- cable.
The potential Comparison Circuit includes switching circuit and coupled third turning circuit, the head of potential Comparison Circuit
The cathode of end and the second connector is commonly connected to GND ends, and the head end for flowing to adapter circuit is selectively applied in positive pressure
Potential or negative pressure potential.The head end of the leading-in end connection potential Comparison Circuit of third turning circuit, the extraction of third turning circuit
The end of end connection potential Comparison Circuit；When switching circuit is closed, and third turning circuit is connected, third turning circuit is sent out
Third Continuity signal.
Specifically, the third turning circuit includes third photoelectrical coupler U200C, the positive and negative electrode of input terminal is distinguished
Form leading-in end, the exit of the third turning circuit；The output terminal emitter of third photoelectrical coupler U200C is connected to
GND ends, output terminal collector draws two connecting pins, wherein a connecting pin is connected to a positive pressure potential by a resistance R204
End, another connecting pin forms a signal output end, when its input terminal is connected, to send out the third Continuity signal.
In addition, the switching circuit includes the 4th photoelectrical coupler U200D, and during output terminal triode ON, switch electricity
Road is closed.The input anode of 4th photoelectrical coupler U200D forms a closure signal input terminal, to receive a control signal,
Whether its input cathode connection GND ends, the control signal control the input terminal to be connected so as to control whether its output terminal leads
It is logical.The head end of the output terminal collector connection potential Comparison Circuit of 4th photoelectrical coupler, output terminal emitter connection third
The input anode of photoelectrical coupler.
Preferably, it is equipped in the output terminal inter-collector of the head end and the 4th photoelectrical coupler U200D of potential Comparison Circuit
The cathode of one diode D200, diode D200 connect the output terminal collector of the 4th photoelectrical coupler U200D；Third photoelectricity
The input terminal of coupler U200C is also in parallel another between positive and negative electrode by the head ends of a resistance R203 connection potential Comparison Circuits
Resistance R205；The input anode of 4th photoelectrical coupler forms the closure signal input terminal by a resistance R206.Preferably,
The also one capacitance C200 of parallel connection between the positive and negative electrode of the second connector J200.
Referring next to Fig. 7-10, the utility model additionally provides a kind of temperature sensing cable suitable for vehicle environment and detects electricity
Road, using above-mentioned temperature sensing cable assembly, and including：MCU module and power supply circuit.MCU module is used to receive the Continuity signal,
Temperature sensing cable state in which is judged with detecting, and power supply circuit is supplied for providing power supply.
MCU module have 6 general purpose I/O ports for being set to input terminal, be respectively PA0/INT0 ends, PA1 ends,
PA2 ends, PB0/INT1 ends, PA3 ends, PA4 ends.The PA0/INT0 ends, PA1 ends, PA2 ends connect the first photoelectricity coupling respectively
Clutch, the second photoelectrical coupler, third photoelectrical coupler signal output end, to receive each Continuity signal, MCU module according to
Judge temperature sensing cable state in which according to the combination of each Continuity signal.In the present embodiment, the Continuity signal is level
Signal.In addition, the PA0/INT0 ends wake up port with outer interruption of the PB0/INT1 ends for MCU module, it can be by defeated to its
Enter suspend mode after level signal or wake up MCU module.Thus, the PB0/INT1 end signals are connected to automobile ACC power supplys, the ACC
Power supply sends out level signal by a built-up circuit to it.
It is corresponding to lead when the input terminal conducting of the first photoelectrical coupler, the second photoelectrical coupler, third photoelectrical coupler
Messenger is low level signal；When its input terminal does not turn on, corresponding Continuity signal is high level signal.When ACC power supplys are opened
Qi Shi, ACC power supply send out low level signal by the built-up circuit；When ACC power supplys are closed, ACC power supplys pass through described turn
It connects circuit and sends out high level signal.Thus, when ACC electric power startings, MCU module wakes up, and when ACC power supplys are closed, MCU moulds
Block suspend mode, to reduce quiescent current.In addition, by the way that MCU module can be waken up to PA0/INT0 ends input low level signal.It is described
PA3 ends connect the closure signal input terminal, and the closure signal is level signal.When PA3 ends export low level, the 4th light
The output terminal triode of electric coupler is not turned on, and switching circuit disconnects；When PA3 ends export high level, the 4th photoelectrical coupler
Output terminal triode ON, switching circuit breaks closure.Pass through the PA3 ends so that MCU module controllable switch circuit closes
It closes and disconnects.
The power supply circuit has potential output terminal and switching signal input terminal, the potential output terminal connection flow direction adaptation
The head end of circuit, the PA4 ends connect the switching signal input terminal.The switching signal is level signal, when MCU is set
When PA4 ends export low level signal, potential output terminal output positive pressure potential；When MCU settings PA4 exports high level signal, electricity
Gesture output terminal exports negative pressure potential.
In concrete structure, the power supply circuit includes power adapter circuit and positive and negative power switching circuit.
Power adapter circuit includes the first regulator circuit, the second regulator circuit, negative supply switch, negative pressure conversion circuit；
The input terminal of first regulator circuit is connected to automobile storage battery, defeated for the 12V output voltages of automobile storage battery to be converted to+8V
Go out, output terminal draws three connecting pins, wherein two connecting pins are respectively connected to the second regulator circuit and negative pressure conversion circuit
Input terminal, another connecting pin form+8V an output terminals；Second regulator circuit and negative pressure conversion circuit are respectively used to the first voltage stabilizing
The 8V output voltages of circuit are converted to+5V outputs and -8V outputs, and output terminal is respectively formed+5V an output terminals and -8V outputs
End；+ 5V the output terminals form the positive pressure potential end.Preferably, the negative pressure change-over switch signal connection ACC power supplys and MCU
Module, when ACC power supplys are closed, negative pressure change-over switch is closed, and -8V the output terminals are closed, when the closing of ACC power supplys or MCU moulds
When block wakes up, negative pressure change-over switch is opened.
The positive and negative power switching circuit is by P-channel field-effect transistor (PEFT) pipe Q100, the first driving electricity of driving FET Q100
Road, N-channel field-effect tube Q102, the second driving circuit of driving FET Q102, current-limiting resistance R102, current-limiting resistance
R103, diode D100, diode D101 compositions.
Source electrode connection+8V the output terminals of field-effect tube Q100, the anode of drain electrode connection diode D100, grid connection
First driving circuit；Source electrode connection -8V the output terminals of field-effect tube Q102, the cathode of drain electrode connection diode D101, grid
Pole connects the second driving circuit；One end of current-limiting resistance R102, R103 are connected, and the other end connects the cathode of diode D100 respectively
With the anode of D101.
First driving circuit includes phase inverter U102, resistance R100, triode Q101, resistance R101, and described second
Driving circuit includes resistance R105, photoelectrical coupler U101, resistance R104；The grid connection phase inverter U102 of field-effect tube Q100
Output terminal, the output terminal of the grid connection photoelectrical coupler U101 of field-effect tube Q102；The collector connection of triode Q101
+ 5V the output terminals, emitter connection GND ends, base are connected to the input terminal of phase inverter U102 and by resistance R100
Pole is connected to one end of resistance R101；The output terminal of photoelectrical coupler U101 is connected to the -8V output terminals by resistance R105,
Its input terminal is connected to one end of resistance R104, and R101 and R104 is connected to the switching signal input terminal.
When MCU settings are when PA4 ends export low level, field-effect tube Q100 conductings, Q102 is closed, positive and negative power switching electricity
Road direction flows to the head end offer+8V power supplies of adapter circuit；When PA4 exports high level, field-effect tube Q100 is closed, and Q102 is led
Logical, positive and negative power switching circuit is powered to the head end offer -8V of adapter circuit.
About the built-up circuit, with reference to Figure 11, a kind of its implementation structure shown below.Built-up circuit is by triode
Q301, resistance R301, R302, R303, R304 and capacitance C301 compositions.ACC power supplys are connected to three poles by resistance R302, R303
The base stage of pipe Q301, the emitter connection GND ends of Q301, the collector of Q301 draw two connecting pins, and a connecting pin passes through resistance
R301 is connected to the+5V output terminals, and another connecting pin connects the PB0/INT1 ports.In addition, one end of resistance R304 connects
Connect the base stage of triode Q301, other end connection GND ends；One end connection GND ends of capacitance C301, the other end are connected to resistance
The tie point of R302 and R303 parts.So, built-up circuit is realized by the condition conversion of ACC power supplys is level signal to call out
Awake MCU module：When ACC electric power startings, ACC power supplys send out low level signal by the built-up circuit；When ACC power supplys are closed
When, ACC power supplys send out high level signal by the built-up circuit.
By more than structure, in ACC electric power startings, power supply circuit can provide+8V/-8V power supplies, can carry out complete failure
Detecting.And when ACC power supplys are closed, MCU module suspend mode, to reduce quiescent current, and when fire occurs, MCU module is suitable
It is waken up in by fire.In addition, MCU module can not only detect the signal at PA0/INT0 ends, PA1 ends, PA2 ends, also pass through PA3
End, PA4 ends are integrated with to whether closed circuit is closed in positive and negative power switching and potential Comparison Circuit control.
Referring next to Figure 12-13, it is the application method and operation principle of the utility model below, passes through the application method
It can effectively differentiate the various states residing for temperature sensing cable, fire, the short circuit of temperature sensing cable extended line, sense are detected including temperature sensing cable
Warm cable misconnection battery supply, temperature sensing cable is normal, temperature sensing cable is breaking.
The application method of the utility model distinguishes ACC and opens and closes two states.
Wherein, ACC openings include the following steps：
A.MCU modules setting PA3, PA4 end output low levels, and judge the level height that PA0/INT0 ends receive at this time；
B. after step A, if PA0/INT0 ends receive low level, MCU module setting PA3 end outputs low level, PA4 ends are defeated
Go out high level, judge the level height that PA1 ends receive；
C. after step B, if PA1 ends receive high level, for detection circuit faults itself, and corresponding failure letter is exported
Number；
D. after step B, if PA1 ends receive low level, MCU module setting PA3, PA4 end output high level judges PA2
Hold the level height received；
E. after step D, if PA2 ends receive high level, it is determined as temperature sensing cable misconnection to ground or temperature sensing cable extended line
Short circuit, and export corresponding fault-signal；
F. after step D, if PA2 ends receive low level, it is determined as that type fire disaster heat sensitive cable detects fire, and exports fire
Signal；
G. after step A, if PA0/INT0 ends receive high level, MCU module setting PA3 end outputs low level, PA4 ends are defeated
Go out high level, and judge the level height that PA1 ends receive；
H. after step G, if PA1 ends receive high level, it is determined as temperature sensing cable open circuit, and exports corresponding failure letter
Number.
I. after step G, if PA1 ends receive low level, MCU module setting PA3, PA4 end output high level judges PA2
Hold the level height received；
J. after step I, if PA2 ends receive high level, it is determined as temperature sensing cable misconnection to battery feed, and the output phase
The fault-signal answered；
K. after step I, if PA2 ends receive low level, it is determined as that temperature sensing cable is normal；
ACC closed states, include the following steps：
The setting output of PA3, PA4 end is low level by a.MCU modules, into suspend mode to reduce quiescent current, and is waited
Treat whether PA0/INT0 ends have been entered low level；
B. after step a, if PA0/INT0 ends are entered low level MCU module and interrupt wake-up and exit suspend mode, and is negative
Piezoelectricity source switch is driven by MCU module and opens, and MCU module continues to execute above-mentioned detecting step A-K after waking up.Figure 13, which is shown, to be detectd
The detection logic true value table of slowdown monitoring circuit, which show switching PA3 ends, PA4 ends input after PA0/INT0 ends, PA1 ends, PA2
Hold the level signal height correspondence received.The utility model be can be seen that when ACC is opened, using above-mentioned application method
It can effectively differentiate the various states residing for temperature sensing cable.And when ACC is closed, at least when detecting fire, it can wake up described
MCU module, further to be detected.Preferably, the MCU module has PB1 ends, warning device is connected to, when MCU moulds
When block detects fire or other failures, warning device is driven to send out corresponding alarm signal.
The above is only the preferred embodiment of the present invention, not thereby limits its scope of the claims, every to utilize this
The equivalent structure transformation that utility model specification and accompanying drawing content are made directly or indirectly is used in other relevant technology necks
Domain is equally included in the patent within the scope of the utility model.
Claims (18)
1. a kind of temperature sensing cable assembly, which is characterized in that including：First sub- cable, flows to adapter circuit at the second sub- cable, the
One sub- cable, the second sub- cable flow to adapter circuit and are respectively provided with head end and end；The end of first sub- cable, the second sub- cable
It is connected by a diode, the head end connection of the first sub- cable flows to the end of adapter circuit；
It flows to adapter circuit and includes the first turning circuit parallel with one another, the second turning circuit；The leading-in end of first turning circuit
The head end for flowing to adapter circuit, the exit of the first turning circuit and are collectively formed with the exit of the second turning circuit
The leading-in end of two turning circuits collectively forms the end for flowing to adapter circuit；
When the head end potential for flowing to adapter circuit is higher than the head end potential of the second sub- cable, the conducting of the first turning circuit, concurrently
Go out the first Continuity signal；When the head end potential for flowing to adapter circuit is less than the head end potential of the second sub- cable, the second electric conduction
Road is connected, and sends out the second Continuity signal.
2. a kind of temperature sensing cable assembly as described in claim 1, it is characterised in that：The second son of anode connection of the diode
Cable, the cathode of the diode connect the first sub- cable.
3. a kind of temperature sensing cable assembly as claimed in claim 2, it is characterised in that：First turning circuit includes the first photoelectricity coupling
Clutch, input terminal positive and negative electrode respectively constitute leading-in end, the exit of first turning circuit；Second turning circuit includes
Second photoelectrical coupler, input terminal positive and negative electrode respectively constitute leading-in end, the exit of second turning circuit；
First photoelectrical coupler, the second photoelectrical coupler input terminal conducting when, output terminal send out first Continuity signal,
Second Continuity signal.
4. a kind of temperature sensing cable assembly as claimed in claim 3, it is characterised in that：First turning circuit and the second turning circuit
Between an in parallel resistance.
5. a kind of temperature sensing cable assembly as claimed in claim 3, it is characterised in that：First photoelectrical coupler, the second photoelectricity coupling
The output terminal emitter of clutch is all connected to GND ends, and output terminal collector draws two connecting pins, wherein a connecting pin leads to
Cross a resistance and be connected to a positive pressure potential end, another connecting pin forms a signal output end, with send out first Continuity signal,
Second Continuity signal.
6. a kind of temperature sensing cable assembly as claimed in claim 3, it is characterised in that：Further include the first temperature sensing cable extended line,
Second temperature sensing cable extended line；
The head end of first sub- cable is connected to the end for flowing to adapter circuit, the second sub- cable by the first temperature sensing cable extended line
Head end connect the second temperature sensing cable extended line；
A resistance is equipped between first sub- cable and the first temperature sensing cable extended line and/or the second sub- cable prolongs with the second temperature sensing cable
A resistance is equipped between long line.
7. a kind of temperature sensing cable assembly as claimed in claim 6, it is characterised in that：Further including definition has the first of positive and negative electrode
Connector and the second connector；
The head end of first sub- cable passes through the first temperature sensing cable extended line, the anode connection flow of the first connector, the second connector
To the end of adapter circuit；The head end of second sub- cable connects the first connector, the second company by the second temperature sensing cable extended line
Connect the cathode of device；
First connector, the second connector can be docked or be detached into male and female.
8. a kind of temperature sensing cable assembly as claimed in claim 6, it is characterised in that：A potential Comparison Circuit is further included, is used for
Compare its head end and the potential of end；The head end of potential Comparison Circuit connects the second temperature sensing cable extended line far from the second sub- cable
One end, end connects the one end of the first temperature sensing cable extended line far from the first sub- cable；
The potential Comparison Circuit includes switching circuit and coupled third turning circuit；The leading-in end of third turning circuit
Connect the head end of potential Comparison Circuit, the end of the exit connection potential Comparison Circuit of third turning circuit；
When switching circuit is closed, and third turning circuit is connected, third turning circuit sends out third Continuity signal.
9. a kind of temperature sensing cable assembly as claimed in claim 8, it is characterised in that：The head end of potential Comparison Circuit and the second sense
The one end of warm cable extension line far from the second sub- cable is commonly connected to GND ends, the head end selectivity for flowing to adapter circuit
Ground is applied in positive pressure potential or negative pressure potential.
10. a kind of temperature sensing cable assembly as claimed in claim 9, it is characterised in that：The third turning circuit includes third
Photoelectrical coupler, the positive and negative electrode of input terminal respectively constitute leading-in end, the exit of the third turning circuit；
The output terminal emitter of third photoelectrical coupler is connected to GND ends, and output terminal collector draws two connecting pins, wherein
One connecting pin is connected to a positive pressure potential end by a resistance, and another connecting pin forms a signal output end, in its input terminal
During conducting, the third Continuity signal is sent out.
11. a kind of temperature sensing cable assembly as claimed in claim 10, it is characterised in that：The switching circuit includes the 4th photoelectricity
Coupler, during output terminal triode ON, switching circuit is closed；
The input anode of 4th photoelectrical coupler forms a closure signal input terminal, to receive a control signal, input terminal
Whether cathode connection GND ends, the control signal control the input terminal to be connected so as to control whether its output terminal is connected；
The head end of the output terminal collector connection potential Comparison Circuit of 4th photoelectrical coupler, output terminal emitter connection third
The input anode of photoelectrical coupler.
12. a kind of temperature sensing cable assembly as claimed in claim 11, it is characterised in that：In the head end of potential Comparison Circuit and
The output terminal inter-collector of four photoelectrical couplers is equipped with a diode, and the cathode of the diode connects the defeated of the 4th photoelectrical coupler
Outlet collector；
The input terminal of third photoelectrical coupler connects the head end of potential Comparison Circuit by a resistance, and parallel connection is gone back between positive and negative electrode
Another resistance；
The input anode of 4th photoelectrical coupler forms the closure signal input terminal by a resistance.
13. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment, using the temperature sensing cable assembly described in claim 11,
It is characterized in that, it further includes：MCU module；
MCU module have 4 general purpose I/O ports for being set to input terminal, be respectively PA0/INT0 ends, PA1 ends, PA2 ends,
PB0/INT1 ends；The PA0/INT0 ends, PA1 ends, PA2 ends connect respectively first photoelectrical coupler, the second photoelectrical coupler,
The signal output end of third photoelectrical coupler, to receive each Continuity signal, group of the MCU module according to each Continuity signal
Close judgement temperature sensing cable state in which；
The PA0/INT0 ends and PB0/INT1 ends wake up port for the outer interruption of MCU module, can be by its incoming level
Suspend mode or wake-up MCU module after signal；
First Continuity signal is level signal, and the PB0/INT1 end signals connect automobile ACC power supplys, which leads to
It crosses a built-up circuit and sends out level signal to it.
14. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment as claimed in claim 13, it is characterised in that：
When the first photoelectrical coupler input terminal is connected, the first Continuity signal is low level signal；When the first photoelectrical coupler is defeated
When entering end and not turning on, the first Continuity signal is high level signal；
When ACC electric power startings, ACC power supplys send out low level signal by the built-up circuit；When ACC power supplys are closed, ACC
Power supply sends out high level signal by the built-up circuit；
By the way that suspend mode or wake-up can be distinguished to PA0/INT0 ends and PB0/INT1 ends input high level signal or low level signal
MCU module.
15. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment as claimed in claim 14, it is characterised in that：
Second Continuity signal, third Continuity signal are level signal, when its corresponding each photoelectrical coupler input terminal conducting
When, the second Continuity signal, third Continuity signal are low level signal；When its corresponding each photoelectrical coupler input terminal does not turn on
When, the second Continuity signal, third Continuity signal are high level signal.
16. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment as claimed in claim 15, it is characterised in that：It is described
MCU module further includes a general purpose I/O port for being set to output terminal, is PA3 ends, and connects the closure signal input
End, the closure signal are level signal；
When PA3 ends export low level, the output terminal triode of the 4th photoelectrical coupler is not turned on, and switching circuit disconnects；Work as PA3
During the output high level of end, the output terminal triode ON of the 4th photoelectrical coupler, switching circuit breaks closure.
17. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment as claimed in claim 16, it is characterised in that：Also wrap
Power supply circuit is included, with potential output terminal and switching signal input terminal, the potential output terminal connection flows to adapter circuit
Head end；MCU module further includes a general purpose I/O port for being set to output terminal, is PA4 ends, and connect the switching signal
Input terminal；
The switching signal is level signal, when MCU setting PA4 ends output low level signal, potential output terminal output positive pressure
Potential；When MCU settings PA4 exports high level signal, potential output terminal output negative pressure potential.
18. a kind of temperature sensing cable circuit for detecting suitable for vehicle environment as claimed in claim 17, it is characterised in that：It is described
Power supply circuit includes power adapter circuit and positive and negative power switching circuit；
The power adapter circuit includes the first regulator circuit, the second regulator circuit, negative supply switch, negative pressure conversion circuit；
The input terminal of first regulator circuit is connected to automobile storage battery, defeated for the 12V output voltages of automobile storage battery to be converted to+8V
Go out, output terminal draws three connecting pins, wherein two connecting pins are respectively connected to the second regulator circuit and negative pressure conversion circuit
Input terminal, another connecting pin form+8V an output terminals；Second regulator circuit and negative pressure conversion circuit are respectively used to the first voltage stabilizing
The 8V output voltages of circuit are converted to+5V outputs and -8V outputs, and output terminal is respectively formed+5V an output terminals and -8V outputs
End；+ 5V the output terminals form the positive pressure potential end；The negative pressure change-over switch signal connection ACC power supplys and MCU module,
When ACC power supplys are closed, negative pressure change-over switch is closed, and -8V the output terminals are closed, when the closing of ACC power supplys or MCU module wake up
When, negative pressure change-over switch is opened；
The positive and negative power switching circuit is by P-channel field-effect transistor (PEFT) pipe Q100, the first driving circuit, the N of driving FET Q100
Channel field-effect pipe Q102, the second driving circuit of driving FET Q102, current-limiting resistance R102, current-limiting resistance R103, two
Pole pipe D100, diode D101 are formed；
Source electrode connection+8V the output terminals of field-effect tube Q100, the anode of drain electrode connection diode D100, grid connection first
Driving circuit；Source electrode connection -8V the output terminals of field-effect tube Q102, the cathode of drain electrode connection diode D101, grid connect
Connect the second driving circuit；One end of current-limiting resistance R102, R103 are connected, the other end connect respectively the cathode of diode D100 with
The anode of D101；
First driving circuit includes phase inverter U102, resistance R100, triode Q101, resistance R101, second driving
Circuit includes resistance R105, photoelectrical coupler U101, resistance R104；The grid connection phase inverter U102's of field-effect tube Q100 is defeated
Outlet, the output terminal of the grid connection photoelectrical coupler U101 of field-effect tube Q102；
The collector of triode Q101 is connected to the input terminal of phase inverter U102 and to be connected to the+5V by resistance R100 defeated
Outlet, emitter connection GND ends, base stage are connected to one end of resistance R101；The output terminal of photoelectrical coupler U101 passes through electricity
Resistance R105 is connected to the -8V output terminals, and input terminal is connected to one end of resistance R104, and R101 and R104 is connected to described cut
Change signal input part；
When MCU setting when PA4 ends export low level when, field-effect tube Q100 conducting, Q102 close, positive and negative power switching circuit to
Head end offer+8V the power supplies of adapter circuit are provided；When PA4 exports high level, field-effect tube Q100 is closed, Q102 conductings, just
Negative power switching circuit is powered to the head end offer -8V of adapter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721770076.8U CN207585788U (en) | 2017-12-18 | 2017-12-18 | A kind of temperature sensing cable assembly and circuit for detecting |
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|---|---|---|---|
| CN201721770076.8U CN207585788U (en) | 2017-12-18 | 2017-12-18 | A kind of temperature sensing cable assembly and circuit for detecting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941360A (en) * | 2017-12-18 | 2018-04-20 | 厦门微普电子科技有限公司 | A kind of temperature sensing cable assembly and circuit for detecting, method for detecting |
| CN113758606A (en) * | 2021-10-14 | 2021-12-07 | 成都微光集电科技有限公司 | Temperature sensor and temperature measuring equipment |
-
2017
- 2017-12-18 CN CN201721770076.8U patent/CN207585788U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941360A (en) * | 2017-12-18 | 2018-04-20 | 厦门微普电子科技有限公司 | A kind of temperature sensing cable assembly and circuit for detecting, method for detecting |
| CN107941360B (en) * | 2017-12-18 | 2023-12-15 | 中汽客汽车零部件（厦门）有限公司 | Temperature sensing cable assembly, detection circuit and detection method |
| CN113758606A (en) * | 2021-10-14 | 2021-12-07 | 成都微光集电科技有限公司 | Temperature sensor and temperature measuring equipment |
| CN113758606B (en) * | 2021-10-14 | 2023-09-05 | 成都微光集电科技有限公司 | Temperature sensor and temperature measuring equipment |
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Effective date of registration: 20210902 Address after: 361000 No. 39, houshantou Road, Guankou Town, Jimei District, Xiamen City, Fujian Province Patentee after: CHINA AUTOMOBILE CUSTOMER AUTO PARTS (XIAMEN) Co.,Ltd. Address before: 361000 room 217, Qida fashion building, No. 16, Longshan Middle Road, Siming District, Xiamen City, Fujian Province Patentee before: XIAMEN MICROPERFECT TECHNOLOGY Co.,Ltd. |