CN106427883B - Anti- cheating safety band alarm device with length detection function - Google Patents
Anti- cheating safety band alarm device with length detection function Download PDFInfo
- Publication number
- CN106427883B CN106427883B CN201611018774.2A CN201611018774A CN106427883B CN 106427883 B CN106427883 B CN 106427883B CN 201611018774 A CN201611018774 A CN 201611018774A CN 106427883 B CN106427883 B CN 106427883B
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- Prior art keywords
- switch
- safety belt
- cheating
- length detection
- belt
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4808—Sensing means arrangements therefor
Abstract
The present invention relates to a kind of anti-cheating safety band alarm device with length detection function, which includes the Bus- Speed Monitoring module being serially connected in major loop, passenger detection module, safety belt lock catch condition discrimination module, alarm module, belt length detection module；Belt length detection module includes belt length sensor, fixed resistance and belt length detection switch；The drawstring of belt length sensor includes being fixed on safety belt and illegally occupying two parts in sensor shaft；Helix groove, ball and ball spring collectively form a slide rheostat, are serially connected in DC loop together with the slide rheostat and fixed resistance；Belt length detection switch and safety belt lock catch condition discrimination wired in parallel are connected in major loop, and its control terminal is connected in the DC loop where slide rheostat and fixed resistance.The present invention is highly reliable, and Detection accuracy is high, can reduce the idea of leaving things to chance of passenger and driver, improve the correct wearing rate of safety belt.
Description
Technical field
The invention belongs to vehicles to multiply personnel safety technical field, be related to a kind of anti-cheating safety belt with length detection function
Warning device and its control method.
Background technology
Currently, common safety belt reminding device is all by detecting whether the eye-splice of safety belt is inserted into safety belt lock
Button judges whether driver or passenger binds safety belt, partial monopoly by the method for image recognition to seatbelt wearing situation into
Row identification, the former cannot recognize that similar to safety belt root is fixed with clip, and safety belt is then ridden over equal with it practise fraud
Method, what the latter was illuminated by the light be affected and algorithm takes that longer, real-time is poor.
Invention content
The technical problem to be solved in the present invention is to provide a kind of, and the anti-cheating safety belt alarm with length detection function fills
It sets, the device reliability is strong, and Detection accuracy is high.
In order to solve the above-mentioned technical problem, the anti-cheating safety band alarm device packet with length detection function of the invention
Include the Bus- Speed Monitoring module being serially connected in major loop, passenger detection module, safety belt lock catch condition discrimination module, alarm module；
Characterized by further comprising belt length detection modules；The belt length detection module includes belt length sensing
Device, fixed resistance and belt length detection switch；The belt length sensor includes sensor housing, is located at sensor
Ball spring, sensor drawstring, sensor shaft, ball, helix groove in shell；A part for sensor drawstring is fixed on
On safety belt, another part is illegally occupied in sensor shaft；Helix groove by close to excircle helix groove insulation layer and lean on
The helix groove conduction region of nearly sensor shaft forms, between axial direction of the ball spring between sensor housing and helix groove
In gap, one end of which is fixed on sensor shell body sidewall, the other end connects ball, and ball is stuck in helix groove；When ball position
When helix groove conduction region, helix groove, ball and ball spring collectively form a slide rheostat, the slide rheostat
It is serially connected in DC loop with together with fixed resistance；Belt length detection switch and safety belt lock catch condition discrimination wired in parallel
It is connected in major loop, and its control terminal is connected in the DC loop where slide rheostat and fixed resistance.
Belt length detection switch uses moving fault relay, output par, c and safety belt lock catch condition discrimination module
And be connected in major loop, importation is serially connected in the DC loop where slide rheostat and fixed resistance.
The helix of the helix groove uses spiral of Archimedes.
Further, the invention also includes safety belt cheating detection circuits；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 terminal of switch with A acceleration
Connection；A acceleration judges that switch and B acceleration judge that one end of switch is connected to the connection of slide rheostat and fixed resistance
Place, the other end are connected respectively to the in-phase input end and inverting input of voltage comparator；The output of voltage comparator passes through non-
Door is connected to the control terminal of safety belt cheating detection switch；Safety belt cheating detection switch and safety belt lock catch condition discrimination module
And it is connected in major loop.
The A acceleration judges that switch uses dynamic circuit connector type relay, and importation is connected to vehicle acceleration information and obtains
It takes in the circuit of device, a contact portion of output par, c is in the tie point of slide rheostat and 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 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 in major loop, and its control terminal 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 in major loop, the importation that safety belt lock catch switch is switched with anchor switch condition adjudgement is connect.
The Bus- Speed Monitoring module includes speed acquisition device and Bus- Speed Monitoring switch；Bus- Speed Monitoring switch, which is serially connected with, to be led back
Lu Zhong, control terminal are connect with speed acquisition device.
The passenger detection module includes pressure sensor and occupant detection switch；Occupant detection switch is serially connected with major loop
In, control terminal is connect with pressure sensor.
The alarm module includes GPS and buzzer；GPS and buzzer are serially connected in major loop.
The operation principle of the present invention：
First, after vehicle launch, Bus- Speed Monitoring mould speed acquisition device in the block is sentenced by obtaining vehicle speed sensor signal
Whether disconnected speed at this time is zero.If speed is zero, judges that vehicle is in not running state, detect again；If speed is not zero,
Then Bus- Speed Monitoring is switched and is closed.
Secondly, the pressure sensor in passenger detection module detects the pressure on seat and is converted into electric signal, if
There is passenger on seat at this time, then controls occupant detection switch and be closed；If controlling occupant detection switch without passenger on seat at this time
It disconnects, 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 is closed, and anchor switch condition adjudgement switch disconnects；If safety belt is not inserted into lock, anchor switch state
Judge that switch is closed, circuit alarm, buzzer, which is opened, reports audio prompt sound, prompts occupant's " Buckle Up ", lasting to report
Alert setting time is not inserted into, and is sent GPS signal to vehicle supervision department and is reported vehicle specific location.
Belt length detection module carry out belt length detection, if detect safety belt be drawn out length meet it is minimum
Length range, i.e. ball slide into helix groove conduction region along helix groove, and slide rheostat is connected, and belt length is examined at this time
Slowdown monitoring switch turns off；If detecting, safety belt is drawn out length violation and closes minimum length range, i.e. ball is located at helix groove insulation
Area, slide rheostat access failure, belt length detection switch closure, circuit alarm, buzzer are opened report audio and are carried at this time
Show sound, prompts 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 specific location.
When vehicle acceleration acquisition device detects that the deceleration of vehicle is less than the critical deceleration threshold of setting, safety
Band cheating detection circuit proceeds by cheating state-detection, and cheating is taken when driver or passenger fasten the safety belt if detecting
Mode, safety belt practise fraud detection switch be closed, circuit alarm, buzzer open report audio prompt sound, prompt occupant " please just
It really fastens seat belts "；When persistently alarm is not inserted into for T seconds, sends GPS signal to vehicle supervision department and report vehicle specific position
It sets.
Beneficial effects of the present invention:
1, the present invention in original restraint system by installing belt length sensor, the length that safety belt is drawn out
The advantages of degree is converted to the mechanical movement of mechanical mechanism, this mode be there is higher circuit maintainability, and this
Invention and the coiler of safety belt have preferable compatibility, the accuracy of detection higher.
2, the present invention can accurately detect that various common safety belts cheatings are method, and mainly use Machine Design with
And circuit design mode, highly reliable, Detection accuracy is high, has good practical value.And the present invention can be according to being
The different wrong ways of safety belt carry out different promptings to driver and passenger, can reduce passenger and driving to a certain extent
The idea of leaving things to chance of member, improves the correct wearing rate of safety belt.
Description of the drawings
The invention will be further described 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 invention.
Fig. 2 a are the stereogram of belt length sensor；Fig. 2 b are the vertical view on belt length sensor top；Figure
2c is the upward view of belt length sensor lower part；Fig. 2 d are the partial cross-sectional view of belt length sensor.
Fig. 3 a are the first mounting means schematic diagram of safety belt；Fig. 3 b are that second of mounting means of safety belt is illustrated
Figure.
Fig. 4 is the alarm control method flow of the anti-cheating safety band alarm device with length detection function of the present invention
Figure.
Reference numeral：
1：DC power supply；2：Speed acquisition device；3：Bus- Speed Monitoring switchs；4：Pressure sensor；5：Occupant detection switchs；
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 switchs；18：Anchor switch condition adjudgement switchs；19：Ball bullet
Spring；20：Sensor drawstring；21：Sensor 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 lower part；30：Belt length detection switch；
31：Fixed resistance；32：Voltage comparator；33：B acceleration judges switch；34：NOT gate；35：DC power supply.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Referring to Fig.1, the present invention 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 by
Accumulator 1 is powered.
The 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 connect with the control terminal of Bus- Speed Monitoring switch 3, is examined according to speed signal regulation speed
The shutdown 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 directly proportional to speed, the opening and closing of regulation speed detection switch 3.It is described
Bus- Speed Monitoring switch 3 be made of over voltage relay, when voltage is more than zero (corresponding speed be more than zero), Bus- Speed Monitoring switch
3 are closed：Otherwise when 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 mounted on vehicle
On seat, the control terminal of 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,
Control the closure of occupant detection switch 5.If being fitted without pressure sensor, need to install pressure biography additional for the corresponding seat of vehicle
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
It detains on off state and judges that switch 18 uses moving fault relay switch, importation is connected to the original of safety belt lock catch switch 14
Have in circuit, output par, c is connected in major loop；When safety belt 13 is inserted into lock, safety belt lock catch switch 14 is closed,
Anchor switch condition adjudgement switch 18 is obtained electric and is disconnected at this time；Otherwise anchor switch condition adjudgement switch 18 is in closed state.
In addition to this, 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.
With reference to Fig. 2 a~2d, belt length sensor includes sensor housing 26 and sensor top on its interior
27, sensor lower part 28.Sensor housing 26 can be fixed inside the vehicle close to any position of safety belt 13；Sensor top
27 are attached with sensor lower part 28 by sensor shaft 21, can synchronous rotary and return under force.
Sensor lower part 28 includes sensor drawstring 20, sensor 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 with 13 top of safety belt and preceding L14(L14=
L1+L4) length be located at the outside of sensor housing 26 and be fixed on safety belt 13, remaining length, which is illegally occupied, to be passed
In sensor 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 continue to stretch and extend that sensor lower part 28 is driven to rotate, and then sensor top 27 is driven to rotate.
Sensor top 27 includes helix groove 23, ball 22, ball spring 19；Helix groove 23 divides for close to excircle
Helix groove insulation layer 24 and helix groove conduction region 25 close to sensor shaft 21；Ball spring 19 is located at sensor shell
In axial gap between body 26 and helix groove 23, one end of which is fixed on 26 side wall of sensor housing, other end connection is rolled
Pearl 22, ball 22 are 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, which is serially connected in one together with fixed resistance 32
In DC loop, which may be used accumulator 1 and is used as DC power supply, can also use individual DC power supply；Spiral shell
Spin line slot 23 is connected to the anode of DC power supply, ball bullet close to one end of sensor shaft 21 as 10 anode of slide rheostat
Spring 19 is connect as the cathode of slide rheostat 10 with fixed resistance 31；Belt length detection switch 30 uses moving fault relay
Device, output par, c are connected on safety belt lock catch condition discrimination wired in parallel in major loop, and importation is serially connected with sliding and becomes
In the DC loop for hindering 32 place of device 10 and fixed resistance.
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 lower part 28 is rotated clockwise by the effect of safety belt 13, sensor top 27 also synchronously rotates clockwise, this
When ball 22 under the action of helix groove 23 along helix groove insulation layer 24 to 23 center movement of helix groove, slide at this time
Rheostat 10 is off, and belt length detection switch 30 is in closed state.It is 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 slide rheostat 10 is connected at this time, peace
Complete 30 toggled disconnection of strip length detection switch.Meanwhile continuing to pull out with safety belt 13, the resistance value of slide rheostat 10
It changes.When safety belt 13 is released from, ball 22 is under the action of the drawing force of ball spring 19 with helix groove 23
Rotation 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 20 top of sensor drawstring
Ball 22 etc. rates along helix center itself composition ray move at the uniform velocity when, the ray again with constant angular velocity in
The heart rotates, and keeps stability when belt length working sensor.
When 13 tensile elongation of safety belt is in L14-L123When in range, ball 22 is contacted with helix groove insulation layer 24, sliding
10 place circuit of rheostat disconnects, and belt length detection switch 30 is closed at this time.It is more than threshold value L in safety belt tensile elongation123
When, it is believed that safety belt 13 has been drawn out correct length, and ball 22 is contacted with helix groove conduction region 25 at this time, slide rheostat
10 place closings of circuit, belt length detection switch 30 disconnect at this time.
With reference to Fig. 3 a, L14For the extension elongation of safety belt in its natural state, wherein L14=L1+L4, with reference to Fig. 3 b, L123
The minimum length extended naturally being inserted into unmanned take for safety belt in buckle, wherein L123=L1+L2+L3, wherein L14With
L123Concrete numerical value and corresponding helix groove conduction region and the length of helix groove insulation layer passed through all in accordance with different vehicles
It is obtained and with work by measuring.
The installation method of belt length sensor, it is preferable that can will be safe according to the specific space layout situation of vehicle
The main body installation of strip length sensor is in the car at belt reel.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 switch 11 and B acceleration judge that the control terminal of switch 33 is connect 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 32, 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 terminal 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, voltage value can be directly acquired, controlling A acceleration by voltage value judges that switch 11 and B add
Velocity estimated switch 33；If it is charge signal that vehicle, which has been installed acceleration transducer and exported, system installs charge voltage additional and turns
Parallel operation controls A acceleration by voltage value and judges that switch 11 and B acceleration judge switch 33.
Preferably, A acceleration judges that switch 11 uses dynamic circuit connector type over voltage relay, is corresponded to using critical deceleration threshold
Critical voltage value as control over voltage relay be opened and closed 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 correspondence of safety belt tensile elongation, and reply is specific
Type of vehicle carries out analysis of experiments and then determines.
The B acceleration judges that switch uses moving fault relay.
Its principle of safety belt detection cheating circuit is after passenger fastens one's safety belt, when vehicle acceleration acquisition device 12 is examined
When measuring the deceleration of vehicle less than critical deceleration threshold, passenger leads to forward lean, safety belt due to enough inertia force
13 stress increase and are elongated, then the ball 22 of belt length sensor is slided to 25 center of helix groove conduction region, then
The effective resistance of slide rheostat 10 becomes smaller；And if safety belt is fixed or is tied up to equal cheatings behind with clip with root
When being inserted into lock, safety belt 13 does not stress, and the effective resistance of slide rheostat 10 is unchanged at this time, therefore can pass through this side
Method judges whether safety belt 13 practises fraud.
Slide rheostat 10 is connected with fixed resistance 31, what voltage comparator 32 detected is the electricity at 31 both ends of fixed resistance
Pressure value.Before A acceleration judges that switch 11 is closed, voltage comparator 32 has measured the raw voltage values of 31 both sides of fixed resistance
VA, and the inverting input of input voltage comparator 32.When vehicle acceleration acquisition device 12 detects that vehicle acceleration reaches
When 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 become smaller, it is V that the 31 both sides voltage value of fixed resistance of 32 in-phase input end of input voltage comparator, which increases, at this timeB,
Then voltage comparator 32 exports high level, becomes low level after NOT gate 34.Safety belt practise fraud detection switch 9 be dynamic circuit connector type after
Electric switch does not trigger at this time.If taking cheating, since the effective resistance of slide rheostat 10 does not change, Gu
To determine 31 both sides voltage of resistance not change, then voltage comparator 32 exports low level, becomes high level after NOT gate 34, this
When safety belt cheating detection switch 9 be closed, report audio prompt sound 2, buzzer prompt tone is " please correctly to fasten seat belts！”.
The alarm module is made of GPS6, buzzer 7, containing there are two types of the different languages recorded wherein in buzzer 7
Sound prompts, and buzzer 7 is controlled by timer, 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 ".It persistently alarms when being not inserted within T seconds, alarm module is to vehicle supervision department
It sends GPS6 signals and reports vehicle specific location.
With reference to flow chart shown in Fig. 4, working principle of the present invention is as follows：
(1) Step 1: vehicle-state differentiates, after vehicle launch, speed acquisition device 2 is believed by obtaining vehicle speed sensor
Number, judge whether speed is zero at this time.If speed is zero, judgement at this time is in not running state vehicle, detects again at this time；If
Speed is not zero, and Bus- Speed Monitoring switch 3 is closed, and carries out step 2 at this time.
(2) Step 2: passenger status detects, the electric signal that analyzing processing pressure sensor 4 transmits simultaneously carries out pressure judgement,
If it is determined that there is passenger on seat, occupant detection switch 5 is closed and carries out step 3 at this time；If it is determined that at this time on seat without passenger,
Occupant detection switch 5 disconnects at this time, differentiates again to occupant state 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
It is closed, anchor switch condition adjudgement switch 18 disconnects at this time, 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, which is opened, reports audio prompt sound 1, persistently alarms T seconds not
It is inserted into, GPS6 signals are sent to vehicle supervision department and reports vehicle specific location.
(4) Step 4: belt length detects, if detecting, safety belt 13 is drawn out length and meets minimum length range,
Belt length detection switch 30 disconnects, and carries out step 5 at this time；If it is minimum to detect that safety belt 13 is drawn out length violation conjunction
Length range, at this time system think the vehicle used safety belt cheating lock, at this time belt length detection switch 30 be closed,
Circuit alarm, buzzer 7, which is opened, reports audio prompt sound 2, and persistently alarming T seconds is not inserted into, and GPS6 is sent to vehicle supervision department
Signal simultaneously reports vehicle specific location.
(5) Step 5: safety belt cheating differentiates, when vehicle acceleration acquisition device 12 detects that the deceleration of vehicle is less than
When 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, which is opened, to be reported
Audio prompt sound 2 when persistently alarm is not inserted into for T seconds, sends GPS6 signals to vehicle supervision department and reports vehicle specific location.
Wherein, Step 1: two sequencing is the logical order understood for convenience, in actual circuit not deliberately
Emphasize sequencing.Step 3: four be Step 1: two all meet and circuit connect after, this two step is just of practical significance, and
The two is not emphasized and Step 1: two priority is distinguished.And step 5 is after vehicle deceleration reaches critical deceleration threshold
Startup is just played, is the last one step.
Alarm duration T can refer to the average time determination that the passenger of different automobile types fastens seat belts, therefore alarm is held
Continuous time T is determined by vehicle.It does not fasten 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 (10)
1. a kind of anti-cheating safety band alarm device with length detection function, it is characterised in that including being serially connected in major loop
Bus- Speed Monitoring 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 include belt length sensor, fixed resistance (31) and
Belt length detection switch (30)；The belt length sensor includes sensor housing (26), is located at sensor housing
(26) ball spring (19), sensor drawstring (20), sensor shaft (21), ball (22), helix groove (23) in；Sensing
A part for device drawstring (20) is fixed on safety belt (13), and another part is illegally occupied in sensor shaft (21)；Helix groove
(23) by the helix groove insulation layer (24) close to excircle and the helix groove conduction region (25) close to sensor shaft (21)
Composition, ball spring (19) are located in the axial gap between sensor housing (26) and helix groove (23), and one end is fixed
On sensor housing (26) side wall, the other end connects ball (22), and ball (22) is stuck in helix groove (23)；Work as ball
(22) when being located at helix groove conduction region (25), helix groove (23), ball (22) and ball spring (19) collectively form one
Slide rheostat (10), the slide rheostat (10) are serially connected in DC loop together with fixed resistance (31)；Belt length
Detection switch (30) is connected on safety belt lock catch condition discrimination wired in parallel in major loop, and its control terminal is connected to sliding and becomes
In DC loop where resistance device (10) and fixed resistance (31).
2. the anti-cheating safety band alarm device according to claim 1 with length detection function, it is characterised in that institute
It states belt length detection switch (30) and uses moving fault relay, output par, c and safety belt lock catch condition discrimination module are simultaneously
It is connected in major loop, importation is serially connected in the DC loop where slide rheostat (10) and fixed resistance (31).
3. the anti-cheating safety band alarm device according to claim 1 with length detection function, it is characterised in that institute
The helix for the helix groove (23) stated uses spiral of Archimedes.
4. the anti-cheating safety band alarm device according to claim 1 with length detection function, 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
It switchs (9)；The vehicle acceleration information acquisition device (12) judges that switch (11) and B acceleration judge to switch with A acceleration
(33) control terminal connection；A acceleration judges that switch (11) and B acceleration judge that one end of switch (33) is connected to sliding variable resistance
The junction of device (10) and fixed resistance (31), the other end are connected respectively to the in-phase input end and reverse phase of voltage comparator (32)
Input terminal；The output of voltage comparator (32) is connected to the control terminal of safety belt cheating detection switch (9) by NOT gate (34)；Peace
Full band cheating detection switch (9) is connected on safety belt lock catch condition discrimination wired in parallel in major loop.
5. the anti-cheating safety band alarm device according to claim 4 with length detection function, it is characterised in that institute
It states A acceleration and judges that switch (11) uses dynamic circuit connector type relay, importation is connected to vehicle acceleration information acquisition device
(12) in circuit, a contact portion of output par, c slide rheostat (10) and fixed resistance (31) tie point, separately
In-phase input end of one contact portion to voltage comparator (32)；B acceleration judges that switch uses moving fault relay, input
Part is connected in the circuit of vehicle acceleration information acquisition device (12), and a contact portion of output par, c is in 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 according to claim 1 with length detection function, it is characterised in that institute
It includes safety belt lock catch switch (14) and anchor switch condition adjudgement switch (18) to state safety belt lock catch condition discrimination module；Lock
On off state judges that switch (18) is serially connected in major loop, and its control terminal is connect with safety belt lock catch switch (14).
7. the anti-cheating safety band alarm device according to claim 6 with length detection function, it is characterised in that lock
It detains on off state and judges that switch (18) uses dynamic circuit breaker relay switch；Anchor switch condition adjudgement switchs the output par, c string of (18)
It is connected in major loop, safety belt lock catch switchs (14) and connect with the importation of anchor switch condition adjudgement switch (18).
8. the anti-cheating safety band alarm device according to claim 1 with length detection function, it is characterised in that institute
It includes speed acquisition device (2) and Bus- Speed Monitoring switch (3) to state Bus- Speed Monitoring module；Bus- Speed Monitoring switch (3), which is serially connected with, to be led back
Lu Zhong, control terminal are connect with speed acquisition device (2).
9. the anti-cheating safety band alarm device according to claim 1 with length detection function, it is characterised in that institute
It includes pressure sensor (4) and occupant detection switch (5) to state passenger detection module；Occupant detection switch (5) is serially connected with major loop
In, control terminal is connect with pressure sensor (4).
10. the anti-cheating safety band alarm device according to claim 1 with length detection function, it is characterised in that institute
It includes GPS (6) and buzzer (7) to state alarm module；GPS (6) and buzzer (7) are serially connected in major loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107415782B (en) * | 2017-09-08 | 2020-05-22 | 上海沃雨电子科技有限公司 | ISOFIX coupling mechanism of children's safety seat |
| CN108791181A (en) * | 2018-08-04 | 2018-11-13 | 苏州启威电子有限公司 | A kind of safety belt monitoring system using specific turbine and worm transmission mechanism |
| CN108791183A (en) * | 2018-08-04 | 2018-11-13 | 苏州启威电子有限公司 | safety belt monitoring system |
| CN108791182A (en) * | 2018-08-04 | 2018-11-13 | 苏州启威电子有限公司 | A kind of safety belt monitoring system using specific gear drive mechanism |
| CN110001571B (en) * | 2019-04-04 | 2020-12-15 | 潍柴(扬州)亚星新能源商用车有限公司 | Safety belt fastening device and method based on usb charging control |
| CN110712617B (en) * | 2019-09-30 | 2021-10-22 | 广州大道信息科技有限公司 | Safety belt unbuckling reminding system |
| CN111332242B (en) * | 2020-02-24 | 2021-09-28 | 东风汽车有限公司 | Safety belt length detection device, automobile restraint system response method and electronic equipment |
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| US7642907B2 (en) * | 2005-12-21 | 2010-01-05 | Lear Corporation | Wireless buckle-up detection using RF technology |
| CN103522981B (en) * | 2013-10-14 | 2016-02-03 | 江苏理工学院 | Automobile anti-fraud formula safety strap Button Block |
| CN204937070U (en) * | 2015-08-05 | 2016-01-06 | 武汉科荣车业有限公司 | A kind of safety strap system alarm device |
| CN205059531U (en) * | 2015-10-21 | 2016-03-02 | 芜湖金安世腾汽车安全系统有限公司 | Car blet with locate function |
| CN205311545U (en) * | 2015-12-25 | 2016-06-15 | 杭州职业技术学院 | Safety check monitored control system is taken to car |
| CN106114451A (en) * | 2016-08-31 | 2016-11-16 | 开平市中铝实业有限公司 | A kind of automotive seat and automobile |
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