CN206217840U - Anti- cheating safety band alarm device with length detection function - Google Patents
Anti- cheating safety band alarm device with length detection function Download PDFInfo
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- CN206217840U CN206217840U CN201621250860.1U CN201621250860U CN206217840U CN 206217840 U CN206217840 U CN 206217840U CN 201621250860 U CN201621250860 U CN 201621250860U CN 206217840 U CN206217840 U CN 206217840U
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- length detection
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Abstract
The utility model is related to a kind of anti-cheating safety band alarm device with length detection function, the device includes the Bus- Speed Monitoring module, passenger detection module, safety belt lock catch condition discrimination module, the alarm module, belt length detection module that are serially connected with major loop；Belt length detection module includes belt length sensor, fixed resistance and belt length detection switch；The drawstring of belt length sensor includes two parts for being fixed on safety belt and illegally occupying in sensor rotating shaft；Helix groove, ball and ball spring collectively form a slide rheostat, and the slide rheostat is serially connected in DC loop together with fixed resistance；In DC loop where belt length detection switch is connected in major loop with safety belt lock catch condition discrimination wired in parallel, and its control end is connected to slide rheostat and fixed resistance.The utility model is highly reliable, and Detection accuracy is high, and can improve the correct of safety belt and wear rate.
Description
Technical field
The utility model belongs to car and multiplies personal security technical field, is related to a kind of anti-cheating with length detection function to pacify
Full band warning device and its control method.
Background technology
At present, common safety belt reminding device is all by detecting whether the eye-splice of safety belt inserts safety belt lock
Detain to judge whether driver or passenger binds safety belt, partial monopoly enters seatbelt wearing situation by the method for image recognition
Row identification, the former cannot recognize that and is fixed with clip similar to by safety belt root, then rides over safety belt and waits cheating with it
Method, it is poor that the latter is influenceed larger and algorithm to take more long, real-time by illumination.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of anti-cheating safety belt report with length detection function
Alarm device, the device reliability is strong, and Detection accuracy is high.
In order to solve the above-mentioned technical problem, the anti-cheating safety belt alarm dress with length detection function of the present utility model
Put the Bus- Speed Monitoring module including being serially connected with major loop, passenger detection module, safety belt lock catch condition discrimination module, mould of alarming
Block；Characterized by further comprising belt length detection module；The belt length detection module is passed including belt length
Sensor, fixed resistance and belt length detection switch；The belt length sensor includes sensor housing, positioned at sensing
Ball spring, sensor drawstring in device housing, sensor rotating shaft, ball, helix groove；A part for sensor drawstring is fixed
On safety belt, another part is illegally occupied in sensor rotating shaft；Helix groove by the helix groove insulation layer near excircle and
Near the helix groove conduction region composition of sensor rotating shaft, ball spring is located at the axial direction between sensor housing and helix groove
In gap, its one end is fixed on the wall of sensor shell side, and other end connection ball, ball is stuck in helix groove；Work as ball
During positioned at helix groove conduction region, helix groove, ball and ball spring collectively form a slide rheostat, the slip variable resistance
Device is serially connected in DC loop together with fixed resistance, helix groove near one end of sensor rotating shaft as slide rheostat just
Pole is connected on the positive pole of the DC loop power supply, and ball spring is connected as the negative pole of slide rheostat with fixed resistance；Safety belt
Length detection is switched and is connected in major loop with safety belt lock catch condition discrimination wired in parallel, and its control end is connected to slip and becomes
In DC loop where resistance device and fixed resistance.
Belt length detection switch uses moving fault relay, its output par, c and safety belt lock catch condition discrimination module
And be connected in major loop, its importation be serially connected with slide rheostat and fixed resistance where DC loop in.
The helix of described helix groove uses spiral of Archimedes.
Further, the utility model also includes safety belt cheating detection circuit；The safety belt cheating detection circuit includes
Vehicle acceleration information acquisition device, A acceleration judge that switch, B acceleration judge switch, voltage comparator, not gate, safety belt
Cheating detection switch；The vehicle acceleration information acquisition device judges that switch and B acceleration judge the control of switch with A acceleration
End connection processed；A acceleration judges that switch and B acceleration judge that one end of switch is connected to the company of slide rheostat and fixed resistance
Place is met, the other end is connected respectively to the in-phase input end and inverting input of voltage comparator；The output of voltage comparator passes through
Not gate is connected to the control end of safety belt cheating detection switch；Safety belt cheating detection switch and safety belt lock catch condition discrimination mould
Block is simultaneously connected in major loop.
The A acceleration judges that switch uses dynamic circuit connector type relay, and its importation is connected to vehicle acceleration information and obtains
Take in the circuit of device, a contact portion of output par, c is in slide rheostat and the tie point of fixed resistance, another contact
It is connected to the in-phase input end of voltage comparator；B acceleration judges that switch uses moving fault relay, and its importation is connected to
In the circuit of vehicle acceleration information acquisition device, a contact portion of output par, c is in slide rheostat and fixed resistance
Tie point, the inverting input of another contact portion to voltage comparator.
The safety belt lock catch condition discrimination module includes safety belt lock catch switch and anchor switch condition adjudgement switch；Lock
Button on off state judges that switch is serially connected with major loop, and its control end is connected with safety belt lock catch switch.
Anchor switch condition adjudgement switch uses dynamic circuit breaker relay switch；The output par, c of anchor switch condition adjudgement switch
It is serially connected with major loop, the importation that safety belt lock catch switch is switched with anchor switch condition adjudgement is connected.
The Bus- Speed Monitoring module includes that speed acquisition device and Bus- Speed Monitoring are switched；Bus- Speed Monitoring switch is serially connected with to be led back
Lu Zhong, its control end is connected with speed acquisition device.
The passenger detection module includes that pressure sensor and occupant detection are switched；Occupant detection switch is serially connected with major loop
In, its control end is connected with pressure sensor.
The alarm module includes GPS and buzzer；GPS and buzzer are serially connected with major loop.
Operation principle of the present utility model：
First, after vehicle launch, the speed acquisition device in Bus- Speed Monitoring module is sentenced by obtaining vehicle speed sensor signal
Whether disconnected now speed is zero.If speed is zero, judge that vehicle is in off-duty state, detect again；If speed is not zero,
Then Bus- Speed Monitoring is switched and is closed.
Next, the pressure sensor in passenger detection module detects the pressure on seat and is converted into electric signal, if
Now there is passenger on seat, then control occupant detection switch closure；If now without passenger, control occupant detection switch on seat
Disconnect, occupant state is differentiated again when vehicle restarts.
Safety belt lock catch condition discrimination module carries out safety belt lock catch condition discrimination, if safety belt is inserted into lock, peace
Full belt lock catch switch closure, anchor switch condition adjudgement is switched off；If safety belt is not inserted into lock, anchor switch state
Judge switch closure, circuit alarm, buzzer is opened and reports audio prompt sound, point out occupant's " Buckle Up ", lasting report
Alert setting time is not inserted into, and sends gps signal to vehicle supervision department and reports vehicle particular location.
Belt length detection module carries out belt length detection, meets minimum if detecting safety belt and being drawn out length
Length range, i.e. ball slide into helix groove conduction region along helix groove, and slide rheostat is connected, now belt length inspection
Slowdown monitoring switch is turned off；Minimum length scope, i.e. ball are closed positioned at helix groove insulation if detecting safety belt and being drawn out length violation
Area, slide rheostat access failure, now belt length detection switch closure, circuit alarm, buzzer open report audio carry
Show sound, point out occupant's " please correctly fastening seat belts "；The lasting alarm settings time is not inserted into, and GPS is sent to vehicle supervision department
Signal simultaneously reports vehicle particular location.
When vehicle acceleration acquisition device detects the deceleration of vehicle less than the critical deceleration threshold for setting, safety
Band cheating detection circuit proceeds by cheating state-detection, if detecting driver or taking cheating when passenger fastens the safety belt
Mode, safety belt cheating detection switch closure, circuit alarm, buzzer open report audio prompt sound, point out occupant " please just
Really fasten seat belts "；When persistently alarm is not inserted into for T seconds, sends gps signal to vehicle supervision department and report vehicle specific position
Put.
The beneficial effects of the utility model:
1st, be drawn out for safety belt by installing belt length sensor in original restraint system by the utility model
Length transition be the mechanical movement of mechanical mechanism, the advantage of this mode is that have circuit maintainability higher, and
And the utility model has preferable compatibility with the coiler of safety belt, the accuracy of detection is higher.
2nd, the utility model can accurately detect that various common safety belts cheatings are method, and mainly be set using machinery
Meter and circuit design mode, highly reliable, Detection accuracy is high, with good practical value.And the utility model can
Different promptings are carried out to driver and passenger with according to the different wrong ways fastened the safety belt, can be reduced multiply to a certain extent
Visitor and the idea of leaving things to chance of driver, improve the correct of safety belt and wear rate.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the circuit diagram of the anti-cheating safety band alarm device with length detection function of the present utility model.
Fig. 2 a are the stereogram of belt length sensor；Fig. 2 b are the top view on belt length sensor top；Figure
2c is the upward view of belt length sensor bottom；Fig. 2 d are the partial section of belt length sensor.
Fig. 3 a are the first mounting means schematic diagram of safety belt；Fig. 3 b illustrate for second mounting means of safety belt
Figure.
Fig. 4 is the alarm control method of the anti-cheating safety band alarm device with length detection function of the present utility model
Flow chart.
Reference：
1：Dc source；2：Speed acquisition device；3：Bus- Speed Monitoring is switched；4：Pressure sensor；5：Occupant detection is switched；
6：GPS；7：Buzzer；9:Safety belt cheating detection switch；10：Slide rheostat；11：A acceleration judges switch；12：Vehicle
Acceleration acquisition device；13：Safety belt；14：Safety belt lock catch is switched；18：Anchor switch condition adjudgement is switched；19：Ball bullet
Spring；20：Sensor drawstring；21：Sensor rotating shaft；22：Ball；23：Helix groove；24：Helix groove insulation layer；25：Spiral
Wire casing conduction region；26：Sensor housing；27：Sensor top；28：Sensor bottom；30：Belt length detection switch；
31：Fixed resistance；32：Voltage comparator；33：B acceleration judges switch；34：Not gate；35：Dc source.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining Description of Drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Reference picture 1, the utility model is mainly by Bus- Speed Monitoring module, passenger detection module, safety belt lock catch condition discrimination
Module, belt length detection module, safety belt cheating detection circuit and alarm module composition.All electrical equipments of circuit
It is powered by battery 1.
Described Bus- Speed Monitoring module includes speed acquisition device 2 and Bus- Speed Monitoring switch 3；The company of Bus- Speed Monitoring switch 3
It is connected in major loop；Speed acquisition device 2 is connected with the control end of Bus- Speed Monitoring switch 3, is examined according to GES regulation speed
The shut-off of slowdown monitoring switch 3 and closure.
The speed acquisition device 2 carries out the judgement of speed by reading the signal of vehicle speed sensor, by will not
The signal of the sensor of same type is converted into the voltage signal being directly proportional to speed, the opening and closing of regulation speed detection switch 3.It is described
Bus- Speed Monitoring switch 3 be made up of over voltage relay, (correspondence speed is more than zero), Bus- Speed Monitoring switch when voltage is more than zero
3 closures：When otherwise voltage is zero, Bus- Speed Monitoring switch 3 disconnects.
The passenger detection module includes pressure sensor 4 and occupant detection switch 5；Pressure sensor 4 is arranged on vehicle
On seat, the control end of its output connection occupant detection switch 5；Occupant detection switch 5 is serially connected in together with Bus- Speed Monitoring switch 3
In major loop.If being already installed with pressure sensor on seat, pressure signal is directly obtained by the pressure sensor,
The closure of control occupant detection switch 5.If being fitted without pressure sensor, need to be passed for the corresponding seat of vehicle installs pressure additional
Sensor 4.
The safety belt lock catch condition discrimination module includes safety belt 13, safety belt lock catch switch 14, anchor switch state
Judge switch 18.Preferably, safety belt lock catch switch 14 is the contact-making switch in the original safety belt lock catch of vehicle safety belt；Lock
Button on off state judges that switch 18 uses moving fault relay switch, and its importation is connected to the original of safety belt lock catch switch 14
Have in circuit, output par, c is connected in major loop；In safety belt 13 is inserted into lock, safety belt lock catch switch 14 is closed,
Now anchor switch condition adjudgement switch 18 is obtained electric and disconnected；Otherwise anchor switch condition adjudgement switch 18 is in closure state.
In addition, anchor switch condition adjudgement switch 18 can also control opening and closing using other forms by voltage
Switch, such as metal-oxide-semiconductor switch etc..
The belt length detection module includes belt length sensor, belt length detection switch 30 and fixes
Resistance 31.
Reference picture 2a~2d, belt length sensor includes sensor housing 26 and sensor top on its interior
27th, sensor bottom 28.Sensor housing 26 can be fixed on any position of the vehicle interior near safety belt 13；Sensor top
27 are attached with sensor bottom 28 by sensor rotating shaft 21, can synchronous rotary and return under force.
Sensor bottom 28 includes sensor drawstring 20, sensor rotating shaft 21；The thickness of sensor drawstring 20 is 0.5 milli
Rice, width is 8 millimeters, length is 4 meters, and one end of sensor drawstring 20 is connected and preceding L with the top of safety belt 1314(L14=
L1+L4) length be located at sensor housing 26 outside and be fixed on safety belt 13, remaining length illegally occupied pass
In sensor rotating shaft 21.When passenger fasten the safety belt 13 when, in L14On the basis of continue pull out when, sensor drawstring 20 is with safety belt
13 continuation is stretched and extended so as to drive sensor bottom 28 to rotate, and then drives sensor top 27 to rotate.
Sensor top 27 includes helix groove 23, ball 22, ball spring 19；23 points of helix groove is to be close to excircle
Helix groove insulation layer 24 and the helix groove conduction region 25 near sensor rotating shaft 21；Ball spring 19 is located at sensor shell
In axial gap between body 26 and helix groove 23, its one end is fixed on the side wall of sensor housing 26, other end connection rolling
Pearl 22, ball 22 is stuck in helix groove 23；When ball 22 is located at helix groove conduction region 25, helix groove 23, ball 22
A slide rheostat 10 is collectively formed with ball spring 19, the slide rheostat 10 is serially connected in one together with fixed resistance 31
In DC loop, the DC loop can be using battery 1 as dc source, it would however also be possible to employ single dc source；Spiral shell
Spin line groove 23 is connected to the positive pole of dc source, ball bullet near one end of sensor rotating shaft 21 as the positive pole of slide rheostat 10
Spring 19 is connected as the negative pole of slide rheostat 10 with fixed resistance 31；Belt length detection switch 30 uses moving fault relay
Device, its output par, c is connected in major loop with safety belt lock catch condition discrimination wired in parallel, and its importation is serially connected with slip and becomes
In DC loop where resistance device 10 and fixed resistance 31.
The maximum tension length of ball spring 19 is the radius of helix groove 23.Ball 22 is stuck in helix groove 23, when
When sensor bottom 28 is subject to the effect of safety belt 13 to turn clockwise, sensor top 27 also synchronously turns clockwise, this
When ball 22 in the presence of helix groove 23 along helix groove insulation layer 24 to the central motion of helix groove 23, now slide
Rheostat 10 is off, and belt length detection switch 30 is in closure state.Reached when safety belt 13 is drawn out length
To L123(L123=L1+L2+L3) when, ball 22 is transferred to helix groove conduction region 25 just, and now slide rheostat 10 is connected, peace
The toggled disconnection of full strip length detection switch 30.Meanwhile, as the continuation of safety belt 13 is pulled out, the resistance of slide rheostat 10
Change.When safety belt 13 is released from, ball 22 is in the presence of the tensile force of ball spring 19 with helix groove 23
Rotate counterclockwise, the playback of belt length sensor.
The helix classification of helix groove 23 uses spiral of Archimedes, it is therefore an objective to ensure the top of sensor drawstring 20
, when waiting speed to be moved at the uniform velocity along the ray that helix center constitutes itself, the ray is again with constant angular velocity in for ball 22
The heart rotates, and keeps stability during belt length working sensor.
When the tensile elongation of safety belt 13 is in L14-L123In the range of when, ball 22 is contacted with helix groove insulation layer 24, slide
The place circuit of rheostat 10 is disconnected, and belt length detection switch 30 is now closed.Exceed threshold value L in safety belt tensile elongation123
When, it is believed that safety belt 13 has been drawn out correct length, and now ball 22 is contacted with helix groove conduction region 25, slide rheostat
10 place closings of circuit, belt length detection switch 30 now disconnects.
Reference picture 3a, L14It is safety belt extension elongation in its natural state, wherein L14=L1+L4, reference picture 3b, L123
The minimum length of the natural elongation in being inserted into buckle in unmanned seating for safety belt, wherein L123=L1+L2+L3, wherein L14With
L123Concrete numerical value and the length of corresponding helix groove conduction region and helix groove insulation layer passed through all in accordance with different vehicles
Obtained by measurement and with work.
The installation method of belt length sensor, it is preferable that safety can be incited somebody to action according to the specific space deployment scenarios of vehicle
The main body of strip length sensor is installed and is close at belt reel in the car.The size of main body of belt length sensor, according to
Vehicle reasonable structure design, preferentially meets its function.
Safety belt cheating detection circuit include vehicle acceleration information acquisition device 12, A acceleration judge switch 11,
B acceleration judges switch 33, voltage comparator 32, not gate 34, safety belt cheating detection switch 9；The vehicle acceleration information
Acquisition device 12 judges that 11 and B of switch acceleration judges that the control end of switch 33 is connected with A acceleration；A acceleration judges switch
11 and B acceleration judges that one end of switch 33 is connected to the junction of slide rheostat 10 and fixed resistance 31, other end difference
It is connected to the in-phase input end and inverting input of voltage comparator 32；The output of voltage comparator 32 is connected to by not gate 34
The control end of safety belt cheating detection switch 9；Safety belt cheating detection switch 9 connects with safety belt lock catch condition discrimination wired in parallel
In major loop.
Vehicle acceleration acquisition device 12 can take different modes to obtain.Preferably, vehicle has installed acceleration sensing
When device and output signal are voltage, can direct access magnitude of voltage, control A acceleration to judge that 11 and B of switch adds by magnitude of voltage
Velocity estimated switch 33；If vehicle has installed acceleration transducer and has been output as charge signal, system installs charge voltage additional and turns
Parallel operation, controls A acceleration to judge that 11 and B of switch acceleration judges switch 33 by magnitude of voltage.
Preferably, A acceleration judges that switch 11 uses dynamic circuit connector type over voltage relay, using critical deceleration threshold correspondence
Critical voltage value as control over voltage relay opening and closing critical value.Wherein critical deceleration threshold, due to different model
Vehicle has different safety belt structures, and the acceleration of vehicle is different from the corresponding relation of safety belt tensile elongation, and reply is specific
Type of vehicle carries out analysis of experiments and then determination.
The B acceleration judges that switch uses moving fault relay.
Safety belt detection cheating circuit its principle is after passenger fastens one's safety belt, when vehicle acceleration acquisition device 12 is examined
When the deceleration for measuring vehicle is less than critical deceleration threshold, passenger causes forward lean, safety belt due to enough inertia force
13 stress increase and are elongated, then the ball 22 of belt length sensor is to the central slide of helix groove conduction region 25, then
The effective resistance of slide rheostat 10 diminishes；And if safety belt is fixed with root clip or ties up to the cheating such as after one's death
When in insertion lock, safety belt 13 does not stress, and now the effective resistance of slide rheostat 10 is unchanged, therefore can be by this side
Method judges whether safety belt 13 practises fraud.
Slide rheostat 10 is connected with fixed resistance 31, what voltage comparator 32 was detected is the electricity at the two ends of fixed resistance 31
Pressure value.Before A acceleration judges the closure of switch 11, voltage comparator 32 has measured the raw voltage values of the both sides of fixed resistance 31
VA, and input voltage comparator 32 inverting input.Reached when vehicle acceleration acquisition device 12 detects vehicle acceleration
During critical deceleration threshold, A acceleration judges that switch 11 is closed, and B acceleration judges that switch 33 disconnects, due to slide rheostat 10
Effective resistance diminish, it is V that now the both sides magnitude of voltage of fixed resistance 31 of the in-phase input end of input voltage comparator 32 increasesB,
Then voltage comparator 32 exports high level, by being changed into low level after not gate 34.Safety belt cheating detection switch 9 be dynamic circuit connector type after
Electric switch, does not trigger now.If taking cheating, because the effective resistance of slide rheostat 10 does not change, Gu
Determine the both sides voltage of resistance 31 not change, then the output of voltage comparator 32 low level, by being changed into high level after not gate 34, this
When safety belt cheating detection switch 9 close, report audio prompt sound 2, buzzer prompt tone is " please correctly to fasten seat belts！”.
The alarm module is made up of GPS6, buzzer 7, and two kinds of different languages for recording are contained wherein in buzzer 7
Sound is pointed out, and buzzer 7 is by timer control, it is preferable that the content of audio prompt sound 1 is " Buckle Up ", audio
The content of prompt tone 2 is " please correctly fastening seat belts ".When persistently alarm is not inserted into for T seconds, alarm module is to vehicle supervision department
Send GPS6 signals and report vehicle particular location.
Flow chart shown in reference picture 4, operation principle of the present utility model is as follows：
(1) step one, vehicle-state differentiate that after vehicle launch, speed acquisition device 2 is believed by obtaining vehicle speed sensor
Number, judge now whether speed is zero.If speed is zero, now judge to be in off-duty state vehicle, now detect again；If
Speed is not zero, and Bus- Speed Monitoring switch 3 is closed, and now carries out step 2.
(2) step 2, passenger status detect that the electric signal that analyzing and processing pressure sensor 4 is transmitted simultaneously carries out pressure judgement,
If it is determined that there is passenger on seat, now occupant detection switch 5 is closed and carries out step 3；If it is determined that now without passenger on seat,
Now occupant detection switch 5 is disconnected, and occupant state is differentiated again when vehicle restarts.
(3) step 3, safety belt lock catch condition discrimination, if safety belt 13 is inserted into lock, safety belt lock catch switch 14
Closure, now the disconnection of anchor switch condition adjudgement switch 18, carries out step 4；If detecting safety belt 13 is not inserted into lock,
Anchor switch condition adjudgement switch 18 is closed, circuit alarm, and buzzer 7 is opened and reports audio prompt sound 1, persistently alarms T seconds not
Insertion, sends GPS6 signals and reports vehicle particular location to vehicle supervision department.
(4) step 4, belt length detection, minimum length scope is met if detecting safety belt 13 and being drawn out length,
Belt length detection switch 30 disconnects, and now carries out step 5；Close minimum if detecting safety belt 13 and being drawn out length violation
Length range, now system think the vehicle used safety belt practise fraud lock, now belt length detection switch 30 is closed,
Circuit alarm, buzzer 7 is opened and reports audio prompt sound 2, and persistently alarm is not inserted into for T seconds, and GPS6 is sent to vehicle supervision department
Signal simultaneously reports vehicle particular location.
(5) step 5, safety belt cheating differentiates, when the deceleration that vehicle acceleration acquisition device 12 detects vehicle is less than
During critical deceleration threshold, safety belt cheating detection circuit proceeds by cheating state-detection, if detecting driver or multiplying
The mode of cheating is taken when visitor fastens the safety belt, safety belt cheating detection switch 9 is closed, and circuit alarm, buzzer 7 is opened and reported
Audio prompt sound 2, when persistently alarm is not inserted into for T seconds, sends GPS6 signals and reports vehicle particular location to vehicle supervision department.
Wherein, step one, two sequencing are the logical orders for understanding for convenience, in side circuit not deliberately
Emphasize sequencing.Step 3, four are that this two step is just of practical significance after step one, two meet and circuit is connected, and
Do not emphasize to be distinguished with step one, two priority both this.And step 5 is after vehicle deceleration reaches critical deceleration threshold
Startup is just played, is last step.
The average time that the passenger that alarm duration T refers to different automobile types fastens seat belts determines, therefore alarm is held
Continuous time T is determined by vehicle.Do not fastened the safety belt also more than alarm duration T, subjectivity can be judged as and be not desired to fasten the safety belt, be
System will carry out next step compulsory measure.
Claims (9)
1. a kind of anti-cheating safety band alarm device with length detection function includes the Bus- Speed Monitoring being serially connected with major loop
Module, passenger detection module, safety belt lock catch condition discrimination module, alarm module；Characterized by further comprising belt length
Detection module；The belt length detection module includes belt length sensor, fixed resistance (31) and belt length
Detection switch (30)；The belt length sensor includes sensor housing (26), the rolling in sensor housing (26)
Pearl spring (19), sensor drawstring (20), sensor rotating shaft (21), ball (22), helix groove (23)；Sensor drawstring (20)
A part be fixed on safety belt (13), another part is illegally occupied in sensor rotating shaft (21)；Helix groove (23) is by being close to
The helix groove insulation layer (24) of excircle and the helix groove conduction region (25) near sensor rotating shaft (21) are constituted, ball bullet
In axial gap between sensor housing (26) and helix groove (23), its one end is fixed on sensor housing to spring (19)
(26) on the wall of side, the other end connects ball (22), and ball (22) is stuck in helix groove (23)；When ball (22) is positioned at helix
During groove conduction region (25), helix groove (23), ball (22) and ball spring (19) collectively form a slide rheostat (10),
During the slide rheostat (10) is serially connected in DC loop together with fixed resistance (31), helix groove (23) is near sensor rotating shaft
(21) one end is connected on the positive pole of the DC loop power supply as slide rheostat (10) positive pole, and ball spring (19) is used as slip
The negative pole of rheostat (10) is connected with fixed resistance (31)；Belt length detection switch (30) and safety belt lock catch condition discrimination
Direct current where wired in parallel is connected in major loop, and its control end is connected to slide rheostat (10) and fixed resistance (31)
In loop.
2. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that institute
State belt length detection switch (30) and use moving fault relay, its output par, c is with safety belt lock catch condition discrimination module simultaneously
Be connected in major loop, its importation be serially connected with slide rheostat (10) and fixed resistance (31) where DC loop in.
3. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that institute
The helix of the helix groove (23) stated uses spiral of Archimedes.
4. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that also
Including safety belt cheating detection circuit；The safety belt cheating detection circuit includes vehicle acceleration information acquisition device (12), A
Acceleration judges that switch (11), B acceleration judge switch (33), voltage comparator (32), not gate (34), safety belt cheating detection
Switch (9)；The vehicle acceleration information acquisition device (12) judges that switch (11) and B acceleration judge switch with A acceleration
(33) control end connection；A acceleration judges that switch (11) and B acceleration judge that one end of switch (33) is connected to slip variable resistance
The junction of device (10) and fixed resistance (31), the other end is connected respectively to the in-phase input end of voltage comparator (32) and anti-phase
Input；The output of voltage comparator (32) is connected to the control end of safety belt cheating detection switch (9) by not gate (34)；Peace
Full band cheating detection switch (9) is connected in major loop with safety belt lock catch condition discrimination wired in parallel.
5. the anti-cheating safety band alarm device with length detection function according to claim 4, it is characterised in that institute
State A acceleration and judge that switch (11) uses dynamic circuit connector type relay, its importation is connected to vehicle acceleration information acquisition device
(12) in circuit, a contact portion of output par, c in slide rheostat (10) and the tie point of fixed resistance (31), separately
In-phase input end of one contact portion to voltage comparator (32)；B acceleration judges that switch uses moving fault relay, its input
Part is connected in the circuit of vehicle acceleration information acquisition device (12), and a contact portion of output par, c is sliding variable resistance
The tie point of device (10) and fixed resistance (31), the inverting input of another contact portion to voltage comparator (32).
6. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that institute
Stating safety belt lock catch condition discrimination module includes safety belt lock catch switch (14) and anchor switch condition adjudgement switch (18)；Lock
On off state judges that switch (18) is serially connected with major loop, and its control end is connected with safety belt lock catch switch (14).
7. the anti-cheating safety band alarm device with length detection function according to claim 6, it is characterised in that lock
Button on off state judges that switch (18) uses dynamic circuit breaker relay switch；The output par, c string of anchor switch condition adjudgement switch (18)
It is connected in major loop, safety belt lock catch switchs (14) and is connected with the importation of anchor switch condition adjudgement switch (18).
8. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that institute
Stating Bus- Speed Monitoring module includes speed acquisition device (2) and Bus- Speed Monitoring switch (3)；Bus- Speed Monitoring switch (3) is serially connected with to be led back
Lu Zhong, its control end is connected with speed acquisition device (2).
9. the anti-cheating safety band alarm device with length detection function according to claim 1, it is characterised in that institute
Stating passenger detection module includes pressure sensor (4) and occupant detection switch (5)；Occupant detection switch (5) is serially connected with major loop
In, its control end is connected with pressure sensor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621250860.1U CN206217840U (en) | 2016-11-21 | 2016-11-21 | Anti- cheating safety band alarm device with length detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621250860.1U CN206217840U (en) | 2016-11-21 | 2016-11-21 | Anti- cheating safety band alarm device with length detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206217840U true CN206217840U (en) | 2017-06-06 |
Family
ID=58790572
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621250860.1U Expired - Fee Related CN206217840U (en) | 2016-11-21 | 2016-11-21 | Anti- cheating safety band alarm device with length detection function |
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| CN (1) | CN206217840U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111332242A (en) * | 2020-02-24 | 2020-06-26 | 东风汽车有限公司 | Safety belt length detection device, automobile restraint system response method and electronic equipment |
| CN114537321A (en) * | 2022-01-18 | 2022-05-27 | 岚图汽车科技有限公司 | Anti-false fastening system and method for automobile safety belt |
-
2016
- 2016-11-21 CN CN201621250860.1U patent/CN206217840U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111332242A (en) * | 2020-02-24 | 2020-06-26 | 东风汽车有限公司 | Safety belt length detection device, automobile restraint system response method and electronic equipment |
| CN114537321A (en) * | 2022-01-18 | 2022-05-27 | 岚图汽车科技有限公司 | Anti-false fastening system and method for automobile safety belt |
| CN114537321B (en) * | 2022-01-18 | 2023-09-19 | 岚图汽车科技有限公司 | System and method for preventing false tying of automobile safety belt |
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Granted publication date: 20170606 Termination date: 20171121 |