CN209086344U - Preceding windscreen wiper interval resistance detecting circuit - Google Patents
Preceding windscreen wiper interval resistance detecting circuit Download PDFInfo
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- CN209086344U CN209086344U CN201821635450.8U CN201821635450U CN209086344U CN 209086344 U CN209086344 U CN 209086344U CN 201821635450 U CN201821635450 U CN 201821635450U CN 209086344 U CN209086344 U CN 209086344U
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Abstract
The embodiment of the present application provides a kind of preceding windscreen wiper interval resistance detecting circuit, is related to electronic circuit field.Preceding windscreen wiper interval resistance detecting circuit includes: switch, gear circuit and BCM controller；The input terminal of BCM controller is connected with switch, and the output end in gear circuit is connect with the output end of BCM controller；Gear circuit is equipped with multiple contacts, and the impedance in circuit in the impedance in the circuit in multiple contacts between each contact and the output end of BCM controller and multiple contacts between other each contacts and the output end of BCM controller is different；Switch, connect for the targeted contact in multiple contacts with gear circuit, so that being changed into channel status from open-circuit condition between target gear circuit and switch；BCM controller, for obtaining the second detection electric current from the output end of BCM controller from the input terminal of BCM controller input the first detection electric current.By the different current value of BCM controller identification the second detection electric current, the accurate judgement to the state of preceding windscreen wiper interval resistance detecting circuit is realized.
Description
Technical field
This application involves electronic circuit fields, in particular to a kind of preceding windscreen wiper interval resistance detecting circuit.
Background technique
Wiper is to be driven by a motor, and the rotary motion of motor is changed into the reciprocating motion of scraping arm by link mechanism,
Rain movement is blown to realize.Present wiper has generallyd use fast shelves, slow shelves and tapping mode shelves, wherein interval is controlled
Shelves processed are usually to scrape wiper according to some cycles using the return switch contact of motor and the charging/discharging function of resistance capacitance
It sweeps, i.e., often sweeps the primary rear stopping some cycles time, cycle time can be 2-12 seconds time.Currently, preceding windscreen wiper interval
Resistance detecting circuit cannot achieve the fault type for quickly and accurately judging that the circuit for controlling wiper is occurred, this may
Cause driver the rainy day drive because the failure of wiper cause driver sight it is bad due to lead to the hair of contingency
It is raw.
Utility model content
The application's is designed to provide a kind of preceding windscreen wiper interval resistance detecting circuit, is lacked with effectively improving above-mentioned technology
It falls into.
What embodiments herein was realized in the following way:
In a first aspect, the embodiment of the present application provides a kind of preceding windscreen wiper interval resistance detecting circuit, preceding windscreen wiper interval resistance
Detection circuit includes: switch, gear circuit and BCM controller；The input terminal of BCM controller is connected with switch, gear circuit
Output end is connect with the output end of BCM controller；Gear circuit is equipped with multiple contacts, each contact and BCM in multiple contacts
In the impedance in the circuit between the output end of controller and multiple contacts between other each contacts and the output end of BCM controller
Circuit impedance it is different；Switch, connect for the targeted contact in multiple contacts with gear circuit, so that target gear returns
It is changed into channel status from open-circuit condition between road and switch；BCM controller, for from the input terminal of BCM controller input the
One detection electric current, obtains the second detection electric current from the output end of BCM controller, wherein the second detection electric current is to be touched based on target
The electric current that the impedance in the circuit between point and the output end of BCM controller obtains the first detection current limitation.
The technical solution provided with reference to first aspect, in some possible implementations, gear circuit includes at least two
A resistance, each resistance and adjacent resistance gear circuit in series at least two resistance, gear circuit has input terminal
And output end, input terminal are equipped with contact, each resistance at least two resistance is returned with adjacent resistance gear in series
Multiple contacts are equipped between road.
The technical solution provided with reference to first aspect, in some possible implementations, at least two resistance include 5
Resistance, multiple contacts include 4 contacts.
The technical solution provided with reference to first aspect, in some possible implementations, the impedance value difference of 5 resistance
It is 1500 ohm, 820 ohm, 470 ohm, 240 ohm and 200 ohm.
The technical solution provided with reference to first aspect, in some possible implementations, target gear circuit is first
Gear circuit, the first gear circuit, under channel status control before windscreen wiper intermittent time be the first interval duration, first
The impedance in gear circuit is the first impedance value, when being in channel status between the first gear circuit and switch, the first impedance value
It will be to the second detection electric current that the first detection current limitation is the first current value.
The technical solution provided with reference to first aspect, in some possible implementations, target gear circuit is second
Gear circuit, the second gear circuit, under channel status control before windscreen wiper intermittent time be the second interval duration, second
The impedance in gear circuit is the second impedance value, when being in the channel status between the second gear circuit and switch, the second resistance
Anti- value will be to the second detection electric current that the first detection current limitation is the second current value.
The technical solution provided with reference to first aspect, in some possible implementations, target gear circuit is third
Gear circuit, third gear circuit, the intermittent time for windscreen wiper before controlling under channel status are third interval duration, third
The impedance in gear circuit is third impedance value, when being in channel status between third gear circuit and switch, third impedance value
It will be to the second detection electric current that the first detection current limitation is current value.
The technical solution provided with reference to first aspect, in some possible implementations, target gear circuit is the 4th
Gear circuit, fourth speed position circuit, under channel status control before windscreen wiper intermittent time be the 4th interval duration, the 4th
The impedance in gear circuit is the 4th impedance value, when being in channel status between fourth speed position circuit and switch, the 4th impedance value
It will be to the second detection electric current that the first detection current limitation is the 4th current value.
The technical solution provided with reference to first aspect, in some possible implementations, target gear circuit is the 5th
Gear circuit, fifth speed position circuit, under channel status control before windscreen wiper intermittent time be the 5th interval duration, the 5th
The impedance in gear circuit is the 5th impedance value, when being in channel status between fifth speed position circuit and switch, the 5th impedance value
It will be to the second detection electric current that the first detection current limitation is the 5th current value.
The technical solution provided with reference to first aspect switchs in some possible implementations as monopole multi-position switch.
The beneficial effect of the embodiment of the present application is compared to the prior art:
First detection electric current of the input terminal input of BCM controller by targeted contact and BCM controller output end it
Between circuit impedance metering function after become second detection electric current.Due to different preceding windscreen wiper interval resistance detecting circuits
Impedance under target gear circuit has difference, then the resistance under the target gear circuit of preceding windscreen wiper interval resistance detecting circuit
The metering function of anti-generation is also just different.By detecting to the second detection electric current, the second different detection current values is corresponding
The gear state of different preceding windscreen wiper interval resistance detecting circuits.To break down in preceding windscreen wiper interval resistance detecting circuit
When, the target shift of windscreen wiper interval resistance detecting circuit before can accurately being judged by the second detection current value detected
Fault category in the circuit of position, and improve the efficiency for judging the fault category of preceding windscreen wiper interval resistance detecting circuit.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the structure chart of the preceding windscreen wiper interval resistance detecting circuit of the application first embodiment offer；
Fig. 2 shows the structure charts in the first gear circuit that the application first embodiment provides；
Fig. 3 shows the structure chart in the second gear circuit of the application first embodiment offer；
Fig. 4 shows the structure chart in the third gear circuit of the application first embodiment offer；
Fig. 5 shows the structure chart in the fourth speed position circuit of the application first embodiment offer；
Fig. 6 shows the structure chart in the fifth speed position circuit of the application first embodiment offer；
Icon: windscreen wiper interval resistance detecting circuit before 10-；100- switch；110- gear circuit；111- first resistor
111；112- second resistance 112；113- 3rd resistor 113；The 4th resistance 114 of 114-；The 5th resistance 115 of 115-；120- first
Gear circuit；The second gear of 130- circuit；140- third gear circuit；150- fourth speed position circuit；160- fifth speed position circuit；
170-BCM controller.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Usually exist
The component of the embodiment of the present application described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed the application's to the detailed description of the embodiments herein provided in the accompanying drawings below
Range, but it is merely representative of the selected embodiment of the application.Based on embodiments herein, those skilled in the art are not being done
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
In the description of the present application, it should be noted that term " in ", "upper", "horizontal", the orientation of instructions such as "inner" or
Positional relationship be based on the orientation or positional relationship shown in the drawings or this application product using when the orientation usually put or
Positional relationship is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, art
Language " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, are not understood to indicate or imply relatively important
Property.
In addition, the terms such as term "horizontal", "vertical", " vertical " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
First embodiment
Referring to Fig. 1, the embodiment of the present application provides a kind of preceding windscreen wiper interval resistance detecting circuit 10.The preceding windscreen wiper interval
Resistance detecting circuit 10 includes: switch 100, gear circuit 110 and BCM controller 170 (Body Control Module, vehicle body
Control module).
The input terminal of BCM controller 170 is connect with switch 100, the output end and BCM controller 170 in gear circuit 110
Output end connection；Gear circuit 110 is equipped with multiple contacts, the output of each contact and BCM controller 170 in multiple contacts
Circuit in the impedance in the circuit between end and multiple contacts between other each contacts and the output end of BCM controller 170
Impedance is different.
Switch 100 is connect for the targeted contact in multiple contacts with gear circuit 110, so that target gear circuit
It is changed into channel status from open-circuit condition between switch 100.
BCM controller 170, for detecting electric current from the input terminal of BCM controller 170 input first, from BCM controller
170 output end obtains the second detection electric current, wherein the second detection electric current is defeated based on targeted contact and BCM controller 170
The electric current that the impedance in the circuit between outlet obtains the first detection current limitation.Since different preceding windscreen wiper interval resistance is examined
Impedance under the target gear circuit of slowdown monitoring circuit 10 has difference, then in the target shift of preceding windscreen wiper interval resistance detecting circuit 10
The metering function that impedance under the circuit of position generates is also just different.By being detected to the second detection electric current, the second different inspections
Survey the gear state that current value corresponds to different preceding windscreen wiper interval resistance detecting circuits 10.To be examined in preceding windscreen wiper interval resistance
When slowdown monitoring circuit 10 breaks down, windscreen wiper interval resistance before can accurately being judged by the second detection current value detected
Fault category in the target gear circuit of detection circuit 10, and improve the event for judging preceding windscreen wiper interval resistance detecting circuit 10
Hinder the efficiency of classification.
The Each part of preceding windscreen wiper interval resistance detecting circuit 10 will be described in detail below.
One end of switch 100 is connect with the input terminal in gear circuit 110, so that between target gear circuit and switch 100
It is changed into channel status from open-circuit condition；The other end of switch 100 is connect with the input terminal of BCM controller 170.
The type of switch 100 can optionally be opened in the present embodiment for knife switch, rotary switch or button switch
It closes 100 and uses knife switch.On the one hand, knife switch have apparent cut-off point, can connect with disjunction have load circuit with
And the route protection to low capacity route.On the other hand, knife switch cheaper is economical and practical.
In detail, knife switch can be divided into single-pole switch, double-pole switch and triple-pole switch.By plug-in strip in the present embodiment
The gear of the preceding windscreen wiper of switch control has five grades, and knife switch can have an armature contact i.e. contact knife, five rest(ing) contacts
That is contact can play the role of connecting or disconnecting circuit when armature contact is switched on or switched off from different rest(ing) contacts,
It thus can satisfy control to require.Therefore, knife switch selects monopole multi-position switch, and monopole multi-position switch comes with different shelves
Control wiper interval duration.
BCM controller 170 is as one of most important controller of car body component, for including: signal light control, windscreen wiper control
System, power window control, remote-control anti-theft, centrally controrlled locking system control, instrument backlight control and power distribution.It is bound to vehicle electrical
The BCM controller 170 of subrack structure provides maximized reliable while reducing required plug-in unit connection and core of a cable quantity
Property and economy.
BCM controller 170 has input terminal and output end.The input terminal of BCM controller 170 and one end of switch 100 connect
It connects, the output end of BCM controller 170 connects with ground, forms a complete preceding windscreen wiper interval resistance detecting circuit.BCM control
Input terminal input the first detection electric current of device 170, the output end of BCM controller 170 obtain the second detection electric current.It is controlled in BCM
The current value of output end detection the second detection electric current of device 170, windscreen wiper interval resistance before BCM controller 170 can identify
Gear locating for the switch 100 of detection circuit 10.
In detail, the intermittent time of windscreen wiper is the before switch 100 and the first gear circuit 120 control under channel status
When one interval duration, the first current value of the second detection electric current detected is A；Exist in switch 100 and the second gear circuit 130
When the intermittent time of windscreen wiper is the second interval duration before controlling under channel status, the second electric current of the second detection electric current detected
Value is B；When the intermittent time of windscreen wiper before switch 100 and third gear circuit 140 control under channel status is third interval
When long, the third current value of the second detection electric current detected is C；In switch 100 and fourth speed position circuit 150 in channel status
When the intermittent time of windscreen wiper is the 4th interval duration before lower control, the 4th current value of the second detection electric current detected is D；?
When the intermittent time of windscreen wiper is the 5th interval duration before switch 100 and fifth speed position circuit 160 control under channel status, detection
5th current value of the second detection electric current arrived is E；When the current value of the second detection electric current is 0, preceding windscreen wiper interval resistance inspection
Harness open circuit in slowdown monitoring circuit 10.Wherein, a length of 12 seconds when the first interval, 10 seconds a length of, third interval duration when the second interval
It is 8 seconds, when four intervals is 6 seconds a length of, and when five intervals is 4 seconds a length of, and A, B, C, D, E are the second different detection electric current of numerical value
Current value.
The input terminal in gear circuit 110 is connect with the input terminal of BCM control 1, and the output end and BCM in gear circuit 110 are controlled
The output end of device 170 processed connects.Gear circuit 110 is equipped with multiple contacts, each contact and BCM controller in multiple contacts
In the impedance in the circuit between 170 output end and multiple contacts between other each contacts and the output end of BCM controller 170
Circuit impedance it is different.
Gear circuit 110 includes at least two resistance, and optionally, at least two resistance are 5 resistance, and 5 resistance
Impedance is respectively 1500 ohm, 820 ohm, 470 ohm, 240 ohm, 200 ohm.5 resistance be respectively first resistor 111,
Second resistance 112,3rd resistor 113, the 4th resistance 114 and the 5th resistance 115.Wherein, the impedance value of first resistor 111 is
1500 ohm；The impedance value of second resistance 112 is 820 ohm；The impedance value of 3rd resistor 113 is 470 ohm；4th resistance
114 impedance value is 240 ohm；The impedance value of 5th resistance 115 is 200 ohm.Each resistance in 5 resistance and adjacent
Resistance gear circuit 110 in series, gear circuit 110 have input terminal and output end.
The input terminal in gear circuit 110 is equipped with contact, and each resistance at least two resistance is connected with adjacent resistance
Multiple contacts also are provided between the gear circuit of composition.Optionally, in the present embodiment, contact shares 5 contacts.
Select a contact as targeted contact from 5 contacts, targeted contact is connect with switch 100, so that target shift
It is changed into channel status from open-circuit condition between position circuit and switch 100.Different according to the targeted contact of selection, target gear returns
The impedance value on road is different；The metering function so generated due to the impedance value difference in target gear circuit is different, the determined
The current value of two detection electric currents is different.
Referring to Fig. 2, when target gear circuit is the first gear circuit 120, the first gear circuit 120, in access
The intermittent time that wiper is controlled under state is the first interval duration, and when the first interval is 12 seconds a length of.First gear circuit 120
Impedance is the first impedance value, and when being in channel status between the first gear circuit 120 and switch 100, the first impedance value will be right
First detection current limitation is the second detection electric current of the first current value.Wherein, the first current value is A.
First impedance value, which is connected by each resistance in multiple resistance in the first gear circuit 120 with adjacent resistance, to be had
Impedance value.In the present embodiment, the first impedance value is first resistor 111, second resistance 112, the 113, the 4th electricity of 3rd resistor
The series impedances of resistance 114 and the 5th resistance 115, the first 3230 ohm of impedance value.
Referring to Fig. 3, when target gear circuit is the second gear circuit 130, the second gear circuit 130, in access
The intermittent time that wiper is controlled under state is the second interval duration, and when the first interval is 10 seconds a length of.Second gear circuit 130
Impedance is the second impedance value, and when being in channel status between the second gear circuit 130 and switch 100, the second impedance value will be right
First detection current limitation is the second detection electric current of the second current value.Wherein, the second current value is B.
Second impedance value, which is connected by each resistance in multiple resistance in the second gear circuit 130 with adjacent resistance, to be had
Impedance value.In the present embodiment, the second impedance value is second resistance 112,3rd resistor 113, the 4th resistance 114 and the 5th electricity
The series impedances of resistance 115, the second 1730 ohm of impedance value.
Referring to Fig. 4, when target gear circuit is third gear circuit 140, third gear circuit 140, in access
The intermittent time that wiper is controlled under state is third interval duration, and when third interval is 8 seconds a length of.Third gear circuit 140
Impedance is third impedance value, and when being in channel status between third gear circuit 140 and switch 100, third impedance value will be right
First detection current limitation is the second detection electric current of third current value.Wherein, third current value is C.
Third impedance value, which is connected by each resistance in multiple resistance in third gear circuit 140 with adjacent resistance, to be had
Impedance value.In the present embodiment, third impedance value is the series connection of 3rd resistor 113, the 4th resistance 114 and the 5th resistance 115
Impedance value, 910 ohm of third impedance value.
Referring to Fig. 5, when target gear circuit is fourth speed position circuit 150, fourth speed position circuit 150, in access
The intermittent time that wiper is controlled under state is the 4th interval duration, and when four intervals is 6 seconds a length of.Fourth speed position circuit 150
Impedance is the 4th impedance value, and when being in channel status between fourth speed position circuit 150 and switch 100, the 4th impedance value will be right
First detection current limitation is the second detection electric current of the 4th current value.Wherein, the 4th current value is D.
4th impedance value, which is connected by each resistance in multiple resistance in fourth speed position circuit 150 with adjacent resistance, to be had
Impedance value.In the present embodiment, the 4th impedance value is the series impedances of the 4th resistance 114 and the 5th resistance 115, the 4th resistance
440 ohm of anti-value.
Referring to Fig. 6, when target gear circuit is fifth speed position circuit 160, fifth speed position circuit 160, in access
The intermittent time that wiper is controlled under state is the 5th interval duration, and when five intervals is 4 seconds a length of.Fifth speed position circuit 160
Impedance is the 5th impedance value, and when being in channel status between fifth speed position circuit 160 and switch 100, the 5th impedance value will be right
First detection current limitation is the second detection electric current of the 5th current value.Wherein, the 5th current value is E.
5th impedance value, which is connected by each resistance in multiple resistance in fifth speed position circuit 160 with adjacent resistance, to be had
Impedance value.In the present embodiment, the 4th impedance value is the impedance value of the 5th resistance 115, the 5th 200 ohm of impedance value.
In the present embodiment, when switch 100 is connect with the targeted contact in gear circuit 110, so that the first gear circuit 120
When being changed into channel status from open-circuit condition between switch 100, if between multiple resistance in the first gear circuit 120
Normal connection, then first impedance value in the first gear circuit 120 is 3230 ohm, the current value of the second detection electric current is
A1；If short circuit occurs for the harness at the first resistor 111 in the first gear circuit 120, then the first gear circuit obtained
The current value of 120 1730 ohm of the first impedance value, the second detection electric current is A2；If the second electricity in the first gear circuit 120
It hinders the harness at 112 and short circuit occurs, then 2410 ohm of first impedance value in the first gear circuit 120 obtained, the second detection
The current value of electric current is A3；If short circuit occurs for the harness at the 3rd resistor 113 in the first gear circuit 120, then obtain
The current value of 2760 ohm of first impedance value in the first gear circuit 120, the second detection electric current is A4；If the first gear circuit
Short circuit occurs for the harness at the 4th resistance 114 in 120, then first impedance value 2990 in the first gear circuit 120 obtained
The current value of ohm, the second detection electric current is A5；If the harness at the 5th resistance 115 in the first gear circuit 120 occurs short
Road, then 3030 ohm of first impedance value in the first gear circuit 120 obtained, the current value of the second detection electric current is A6.Its
In, A1, A2, A3, A4, A5, A6 are the current value of the second different detection electric current of numerical value.
When switch 100 is connect with the targeted contact in gear circuit 110, so that the second gear circuit 130 and switch 100
Between when be changed into channel status from open-circuit condition, if normally connecting between multiple resistance in the second gear circuit 130
It connects, then second impedance value in the second gear circuit 130 is 1730 ohm, the current value of the second detection electric current is B1；If second
Short circuit occurs for the harness at the second resistance 112 in gear circuit 130, then the second of the second gear circuit 130 obtained hinders
The current value of 910 ohm of anti-value, the second detection electric current is B2；If the harness at 3rd resistor 113 in the second gear circuit 130
Short circuit occurs, then 1260 ohm of second impedance value in the second gear circuit 130 obtained, the current value of the second detection electric current are
B3；If short circuit occurs for the harness at the 4th resistance 114 in the second gear circuit 130, then the second gear circuit 130 obtained
1490 ohm of the second impedance value, second detection electric current current value be B4；If the 5th resistance in the second gear circuit 130
Short circuit occurs for the harness at 115, then 1530 ohm of second impedance value in the second gear circuit 130 obtained, the second detection electricity
The current value of stream is B5.Wherein, B1, B2, B3, B4, B5 are the current value of the second different detection electric current of numerical value.
When switch 100 is connect with the targeted contact in gear circuit 110, so that third gear circuit 140 and switch 100
Between when be changed into channel status from open-circuit condition, if normally connecting between multiple resistance in third gear circuit 140
It connects, then the third impedance value in third gear circuit 140 is 910 ohm, the current value of the second detection electric current is C1；If third
Short circuit occurs for the harness at the 3rd resistor 113 in gear circuit 140, then the third in the third gear circuit 140 obtained hinders
The current value of 440 ohm of anti-value, the second detection electric current is C2；If the harness at the 4th resistance 114 in third gear circuit 140
Short circuit occurs, then 670 ohm of the third impedance value in the third gear circuit 140 obtained, the current value of the second detection electric current are
C3；If short circuit occurs for the harness at the 5th resistance 115 in third gear circuit 140, then the third gear circuit 140 obtained
710 ohm of third impedance value, second detection electric current current value be C4.Wherein, C1, C2, C3, C4 are different second of numerical value
Detect current value.
When switch 100 is connect with the targeted contact in gear circuit 110, so that fourth speed position circuit 150 and switch 100
Between when be changed into channel status from open-circuit condition, if normally connecting between multiple resistance in fourth speed position circuit 150
It connects, then the 4th impedance value in fourth speed position circuit 150 is 440 ohm, the current value of the second detection electric current is D1；If the 4th
Short circuit occurs for the harness at the 4th resistance 114 in gear circuit 150, then the 4th of the fourth speed position circuit 150 obtained the hinders
The current value of 200 ohm of anti-value, the second detection electric current is D2；If the harness at the 5th resistance 115 in fourth speed position circuit 150
Short circuit occurs, then 240 ohm of the 4th impedance value in the fourth speed position circuit 150 obtained, the current value of the second detection electric current are
D3.Wherein, D1, D2, D3 are the current value of the second different detection electric current of numerical value.
When switch 100 is connect with the targeted contact in gear circuit 110, so that fifth speed position circuit 160 and switch 100
Between when be changed into channel status from open-circuit condition, if normally connecting between multiple resistance in fifth speed position circuit 160
It connects, then the 5th impedance value in fifth speed position circuit 160 is 200 ohm, the current value of the second detection electric current is E1；If the 5th
Short circuit occurs for the harness at the 5th resistance 115 in gear circuit 160, then the 5th of the fourth speed position circuit 150 obtained the hinders
Anti- value is 0, and the current value of the second detection electric current is E2.Wherein, E1, E2 are the current value of the second different detection electric current of numerical value.
Different impedance values is different to the metering function of the first detection electric current, therefore.It can be according to second detected
The current value of detection electric current judges the position that short trouble occurs in gear circuit 110.Particularly, when the second detection detected
When electric current is 0, illustrate that open circuit fault has occurred in gear circuit 110.
In conclusion the embodiment of the present application provides a kind of preceding windscreen wiper interval resistance detecting circuit.Preceding windscreen wiper interval resistance
Detection circuit includes: switch, gear circuit and BCM controller；The input terminal of BCM controller is connected with switch, gear circuit
Output end is connect with the output end of BCM controller；Gear circuit is equipped with multiple contacts, each contact and BCM in multiple contacts
In the impedance in the circuit between the output end of controller and multiple contacts between other each contacts and the output end of BCM controller
Circuit impedance it is different；Switch, connect for the targeted contact in multiple contacts with gear circuit, so that target gear returns
It is changed into channel status from open-circuit condition between road and switch；BCM controller, for from the input terminal of BCM controller input the
One detection electric current, obtains the second detection electric current from the output end of BCM controller, wherein the second detection electric current is to be touched based on target
The electric current that the impedance in the circuit between point and the output end of BCM controller obtains the first detection current limitation.BCM controller
Input terminal input limit of the first detection electric current by the impedance in circuit between targeted contact and the output end of BCM controller
Become the second detection electric current after stream effect.Due to the resistance under the target gear circuit of different preceding windscreen wiper interval resistance detecting circuits
It is anti-to have difference, then the metering function that the impedance under the target gear circuit of preceding windscreen wiper interval resistance detecting circuit generates
With regard to difference.By detecting to the second detection electric current, the second different detection current values corresponds to different preceding windscreen wiper interval electricity
Hinder the gear state of detection circuit.To, preceding windscreen wiper interval resistance detecting circuit break down when, by detect second
Fault category before detection current value can accurately be judged in the target gear circuit of windscreen wiper interval resistance detecting circuit,
And improve the efficiency for judging the fault category of preceding windscreen wiper interval resistance detecting circuit.
The above is only preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this application.It should also be noted that similar label and letter are under
Similar terms are indicated in the attached drawing in face, therefore, once being defined in a certain Xiang Yi attached drawing, are not then needed in subsequent attached drawing
It is further defined and explained.
More than, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, and it is any to be familiar with
Those skilled in the art within the technical scope of the present application, can easily think of the change or the replacement, and should all cover
Within the protection scope of the application.Therefore, the protection scope of the application should be subject to the protection scope in claims.
Claims (10)
1. a kind of preceding windscreen wiper interval resistance detecting circuit, which is characterized in that the preceding windscreen wiper interval resistance detecting circuit includes: out
Pass, gear circuit and BCM controller；
The input terminal of the BCM controller and the switch connect, the output end in the gear circuit and the BCM controller
Output end connection；
The gear circuit is equipped with multiple contacts, the output end of each contact and the BCM controller in the multiple contact
Between circuit impedance and the multiple contact in circuit between other each contacts and the output end of the BCM controller
Impedance it is different；
The switch, for being connect with the targeted contact in the multiple contact in the gear circuit, so that target gear returns
It is changed into channel status from open-circuit condition between road and the switch；
The BCM controller, for detecting electric current from the input terminal of BCM controller input first, from the BCM controller
Output end obtain the second detection electric current, wherein the second detection electric current is to be controlled based on the targeted contact and the BCM
The electric current that the impedance in the circuit between the output end of device obtains the first detection current limitation.
2. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that the gear circuit includes extremely
Lack two resistance, each resistance and the adjacent resistance gear circuit in series, the shelves at least two resistance
Position circuit has input terminal and output end, and the input terminal is equipped with contact, each resistance and phase at least two resistance
Adjacent resistance is equipped with multiple contacts between the gear circuit in series.
3. preceding windscreen wiper interval resistance detecting circuit according to claim 2, which is characterized in that at least two resistance packet
5 resistance are included, the multiple contact includes 4 contacts.
4. preceding windscreen wiper interval resistance detecting circuit according to claim 3, which is characterized in that the impedance of 5 resistance
Value is respectively 1500 ohm, 820 ohm, 470 ohm, 240 ohm and 200 ohm.
5. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that target gear circuit is
First gear circuit, first gear circuit, the intermittent time for windscreen wiper before controlling under the channel status are first
The impedance of interval duration, first gear circuit is the first impedance value, between first gear circuit and the switch
When in the channel status, first impedance value will be described the of the first current value to the first detection current limitation
Two detection electric currents.
6. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that target gear circuit is
Second gear circuit, second gear circuit, the intermittent time for windscreen wiper before controlling under the channel status are second
The impedance of interval duration, second gear circuit is the second impedance value, between second gear circuit and the switch
When in the channel status, second impedance value will be described the of the second current value to the first detection current limitation
Two detection electric currents.
7. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that target gear circuit is
Third gear circuit, the third gear circuit, the intermittent time for windscreen wiper before controlling under the channel status are third
The impedance of interval duration, the third gear circuit is third impedance value, between the third gear circuit and the switch
When in the channel status, the third impedance value will be described the of third current value to the first detection current limitation
Two detection electric currents.
8. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that target gear circuit is
Fourth speed position circuit, fourth speed position circuit, the intermittent time for windscreen wiper before controlling under the channel status are the 4th
The impedance of interval duration, fourth speed position circuit is the 4th impedance value, between fourth speed position circuit and the switch
When in the channel status, the 4th impedance value will be described the of the 4th current value to the first detection current limitation
Two detection electric currents.
9. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that target gear circuit is
Fifth speed position circuit, fifth speed position circuit, the intermittent time for windscreen wiper before controlling under the channel status are the 5th
The impedance of interval duration, fifth speed position circuit is the 5th impedance value, between fifth speed position circuit and the switch
When in the channel status, the 5th impedance value will be described the of the 5th current value to the first detection current limitation
Two detection electric currents.
10. preceding windscreen wiper interval resistance detecting circuit according to claim 1, which is characterized in that the switch is that monopole is more
Bit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635450.8U CN209086344U (en) | 2018-10-09 | 2018-10-09 | Preceding windscreen wiper interval resistance detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635450.8U CN209086344U (en) | 2018-10-09 | 2018-10-09 | Preceding windscreen wiper interval resistance detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209086344U true CN209086344U (en) | 2019-07-09 |
Family
ID=67118596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821635450.8U Active CN209086344U (en) | 2018-10-09 | 2018-10-09 | Preceding windscreen wiper interval resistance detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209086344U (en) |
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2018
- 2018-10-09 CN CN201821635450.8U patent/CN209086344U/en active Active
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