CN210271145U - Ripple wave detection anti-theft device - Google Patents
Ripple wave detection anti-theft device Download PDFInfo
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- CN210271145U CN210271145U CN201921149760.3U CN201921149760U CN210271145U CN 210271145 U CN210271145 U CN 210271145U CN 201921149760 U CN201921149760 U CN 201921149760U CN 210271145 U CN210271145 U CN 210271145U
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Abstract
The utility model provides a ripple detection anti-theft device, which comprises a controller, a ripple detection module and an alarm module, wherein the ripple detection module and the alarm module are electrically connected with the controller; the controller is used for receiving a vibration signal representing the vibration state of the vehicle, responding to the ripple voltage signal, enabling the anti-theft device to enter a corresponding anti-theft state or an alarm state and outputting a corresponding control instruction; and the alarm module is used for receiving the control instruction and outputting a corresponding indication signal. Whether the vehicle is in the starting condition is judged through the ripple that detects the battery to the vibration state that combines the vehicle realizes the theftproof function, the utility model discloses an anti-theft device can avoid receiving environmental factor's influence, and theftproof security performance is higher, and the theftproof method is simple easy to carry out moreover.
Description
Technical Field
The utility model relates to a vehicle theftproof technical field especially relates to a ripple detects anti-theft device.
Background
At present, the anti-theft equipment applied to automobiles is various, and the anti-theft effect is also various. Wherein, some vehicles adopt vibration sensor to come the perception vehicle and whether take place the vibration to judge through the mode of software whether need get into alarm state, however because the vehicle use occasion is different, the factor that produces the vibration is numerous, has the difficulty in the aspect of setting up of software, leads to taking place the false positive easily, and the theftproof performance is lower, and user uses and experiences relatively poorly. Also some vehicles adopt vehicle event data recorder (or combine vibration sensor) to shoot the peripheral or the inside sight of vehicle to realize the theftproof function according to the condition of predetermineeing, however, adopt vehicle event data recorder easily to receive the environmental impact, for example because night or heavy fog weather lead to the ambient brightness not enough easily, thereby can influence the shooting effect, and then can influence its theftproof function.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a first purpose aims at providing a ripple that can overcome multiple environment adverse factor influence detects anti-theft device.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a ripple detects anti-theft device, is suitable for and is used for vehicle burglar alarm with the battery connection of vehicle, and it includes the controller, all ripple detection module and the alarm module of being connected with the controller electricity, wherein:
the ripple detection module is used for being electrically connected with the storage battery so as to detect whether the storage battery generates large ripples and output corresponding ripple voltage signals, wherein the large ripples are ripples of which the voltage values are positioned in a preset interval;
the controller is used for receiving a vibration signal representing the vibration state of the vehicle, responding to the ripple voltage signal, enabling the ripple detection anti-theft device to enter a corresponding anti-theft state or an alarm state and outputting a corresponding control instruction;
and the alarm module is used for receiving the control instruction and outputting a corresponding indication signal.
Preferably, ripple detection module is including the voltage input end, amplifier circuit and the comparator that connect gradually, voltage input end is used for being connected to the battery is in order to receive its ripple voltage, amplifier circuit is used for enlargiing ripple voltage, the output of comparator connect in the controller for the ripple voltage after will amplifying is compared with presetting threshold voltage, and is greater than the high level to the controller output when threshold voltage through the ripple voltage of enlarging, and is less than the low level to the controller output when threshold voltage through the ripple voltage of enlarging.
Preferably, the amplifying circuit comprises a first-stage amplifying unit and a second-stage amplifying unit which are connected with each other, the first-stage amplifying unit comprises a triode with a base electrode connected with a voltage input end, the second-stage amplifying unit comprises an operational amplifier with a non-inverting input end connected with a collector electrode of the triode through a capacitor, and an output end of the operational amplifier is connected to a non-inverting input end of the comparator.
Preferably, a voltage boost circuit and a capacitor are sequentially connected between the voltage input end and the amplifying circuit.
And the vibration sensing module is electrically connected with the controller and is used for detecting whether the vehicle is in a vibration state and outputting the vibration signal to the vehicle when the vehicle is detected to be in the vibration state.
Preferably, the vibration sensing module comprises a vibration sensor and/or an acceleration sensor and a matching circuit thereof, and the matching circuit is electrically connected with the controller.
The vibration signal processing device further comprises a wireless communication module electrically connected with the controller, wherein the wireless communication module is used for receiving the vibration signal sent by the external equipment and outputting the vibration signal to the controller.
Specifically, ripple detects anti-theft device includes the casing and locates the circuit board in the casing, controller, ripple detection module and alarm module all locate on the circuit board.
Preferably, a vibration sensing module and a wireless communication module are further disposed on the circuit board and electrically connected to the controller.
Preferably, the housing comprises an upper shell and a lower shell, wherein one of the upper shell and the lower shell is provided with a hook, and the other is provided with a clamping groove which is in snap fit with the hook.
Compared with the prior art, the utility model discloses a scheme has following advantage:
the ripple detection anti-theft device of the utility model, through detecting the ripple size of the storage battery and combining the vibration state of the vehicle, executes to enter the anti-theft state or the alarm state, thereby realizing the anti-theft function of the vehicle, and because the process of obtaining the ripple of the storage battery is not interfered by the external environment, the detection precision is higher; and the built-in program of the controller greatly reduces the difficulty of program design due to simple logic of anti-theft judgment. The anti-theft alarm function can be realized by adopting the controller, the ripple detection module and the alarm module, wherein the vibration signal can be acquired from the existing vibration induction module of the vehicle by the controller, and the anti-theft alarm can also be implemented by arranging the corresponding vibration induction module in the anti-theft device, and the anti-theft alarm has simple structure and low cost.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a perspective view of a ripple detection anti-theft device according to an embodiment of the present invention;
fig. 2 is an exploded view of the ripple detection anti-theft device shown in fig. 1;
fig. 3 is a circuit block diagram of a ripple detection anti-theft device according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a ripple detection anti-theft device according to an embodiment of the present invention;
fig. 5 is a circuit of a ripple detection module according to an embodiment of the present invention;
fig. 6 is a flowchart of a ripple detection anti-theft method according to an embodiment of the present invention;
fig. 7 is a flowchart of a ripple detection anti-theft method according to a preferred embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
The utility model provides a ripple detects anti-theft device 1000 (hereinafter "anti-theft device 1000") and ripple detection anti-theft method (hereinafter "anti-theft method") of implementing thereof, carry out the ripple through the battery to the vehicle and detect, thereby judge that the vehicle is in the starting condition or non-starting condition according to its ripple size, perhaps switching between two kinds of states, and then combine the vibrational state of vehicle to come automatic entering anti-theft state or alarm state, can reduce the design degree of difficulty in the design, on the testing result, owing to can avoid environmental factor's influence, it is higher to detect the precision.
Referring to fig. 1 to 4, as a first aspect, the present invention provides an anti-theft device 1000 including a housing (not labeled, same below) and a circuit board 10 disposed in the housing, wherein the circuit board 10 is provided with a controller 100 and a ripple detection module 200, an alarm module 300, a vibration sensing module, and a wireless communication module, all electrically connected to the controller 100, and an input end of the ripple detection module 200 may be extended out of the housing by a wire or a conductor to electrically connect to a storage battery 2000.
The casing is connected by epitheca 800 and inferior valve 900 detachably and constitutes, and epitheca 800 is equipped with the linking arm (not marking, lower with), the draw-in groove (not marking, lower with) has been seted up to the linking arm, inferior valve 900 extends along the lateral wall and forms the pothook, when epitheca 800 assembles with inferior valve 900, the linking arm elastically entangles inferior valve 900, and makes the pothook be arranged in the draw-in groove. In another embodiment, the hooks and slots may be interchangeable between the top case 800 and the bottom case 900. In other embodiments, the upper shell 800 and the lower shell 900 may be assembled with each other by a threaded connection, an interference fit, and a stud and socket fit.
Referring to fig. 3 to 5, the ripple detection module 200 includes a voltage input terminal 201, an amplifying circuit (not shown, the same below), and a comparator 204, which are connected in sequence, wherein the voltage input terminal 201 is correspondingly connected to the positive electrode and the negative electrode of the battery 2000, the amplifying circuit is used to amplify the voltage of the battery 2000 input from the voltage input terminal, and the output terminal of the comparator is connected to the controller 100.
Preferably, a capacitor is connected in series between the voltage input terminal 201 and the amplifying circuit, and is used for separating the dc voltage of the battery 2000 and sending the ripple voltage of the battery 2000 to a subsequent circuit, i.e., the amplifying circuit.
Since the ripple supplied to the battery 2000 by the engine or other vehicle-mounted electric devices is small, in the present embodiment, an amplifier circuit is provided to amplify the ripple voltage for identification by a subsequent circuit. Preferably, the amplifying circuit comprises a first-stage amplifying unit 202 and a second-stage amplifying unit 203, wherein the first-stage amplifying unit 202 comprises a triode, and the base of the triode is connected with the capacitor; the second-stage amplifying unit 203 comprises an operational amplifier, a non-inverting input terminal of which is connected to a collector of the triode through a capacitor, and an output terminal of which is connected to a non-inverting input terminal of the comparator.
In other embodiments, the amplifying circuit may be provided with only one stage of amplifying unit or more stages of amplifying units, and may be set by a technician as required. Preferably, a capacitor is connected in series between two adjacent stages of amplifying units to isolate a dc circuit component caused by the upper stage amplifying unit, so as to avoid affecting the detection result. In addition, a voltage boosting circuit may be further provided between the voltage input terminal 201 and the capacitor.
As can be seen from the above, the non-inverting input of the comparator 204 is connected to the output of the operational amplifier. The inverting input terminal of the comparator is connected to a reference voltage generating unit (not shown, the same applies hereinafter), so that the amplified ripple voltage can be compared with the reference voltage generated by the reference voltage generating unit, when the amplified ripple voltage is greater than the reference voltage, a high level (i.e., digital signal 1) is output, and when the amplified ripple voltage is less than the reference voltage, a low level (i.e., digital signal 0) is output, so as to identify whether a large ripple is generated for the controller 100.
Wherein the reference voltage generating unit has a voltage dividing circuit that generates the reference voltage.
In this embodiment, the voltage range of the large ripple is a ripple greater than 200MV, for example, the ripple corresponds to the ripple fed back to the battery by the engine when the vehicle is started, and because the vehicle type is different, the power of the engine or other electric devices is different, the generated ripple may also be different, and the technician may set the voltage range of the large ripple according to specific situations.
Preferably, the vibration sensing module is a vibration sensor circuit 400, which includes a vibration sensor for detecting whether the vehicle generates vibration and a matching circuit thereof, including but not limited to a filter circuit and an amplifier circuit, which is connected to the controller 100 to provide a vibration signal to the controller 100 when the vehicle is detected to generate vibration.
In another embodiment, the vibration sensing module is an acceleration sensor circuit 500, which includes an acceleration sensor for detecting whether the vehicle generates vibration and a matching circuit thereof, including but not limited to a filter circuit and an amplifier circuit, which is connected to the controller 100 to provide a vibration signal to the controller 100 when the vehicle is detected to generate vibration.
In still another embodiment, the vibration sensing module may further have a vibration sensor circuit and an acceleration sensor circuit, thereby improving a detection result of the vibration state of the vehicle.
In other embodiments, the vibration signal may also be obtained by a vibration sensing circuit already present in the vehicle. Referring to fig. 2 and fig. 4, specifically, the wireless communication module is a wireless transceiver module 600, which includes a transceiver antenna 601 for communicating with an external device and receiving a vibration signal transmitted by the external device. The external device is, for example, a camcorder 3000 having an acceleration sensor (see DVR of fig. 4). In addition, the wireless transceiver module 600 further includes a communication chip and a crystal oscillator connected to the communication chip.
As can be seen from the above, the controller 100 is connected to the ripple detection module 200, the vibration module, and the wireless communication module, so as to receive the ripple voltage signal of the ripple detection module 200, receive the vibration signal representing the vibration state of the vehicle, and further determine whether the vehicle is in the start state, and drive the anti-theft device 1000 to enter the anti-theft state or the alarm state.
In the present embodiment, it is not set that: when the ripple voltage signal is at a low level, the vehicle is in a non-starting state; when the ripple voltage signal is at a high level and the duration exceeds two seconds, the vehicle is in a starting state. When the vehicle is in a non-starting state, if the vehicle does not vibrate, that is, the vibration signal is not received, the anti-theft device 1000 enters an anti-theft state; when the anti-theft device 1000 is in the anti-theft state and receives the vibration signal, the anti-theft device enters the alarm state.
Referring to fig. 2 and 4, the alarm module 300 includes a buzzer 301 and a buzzer 301 driving circuit, and the buzzer 301 driving circuit is electrically connected to the controller 100. Preferably, the buzzer 301 driving circuit is provided with a transformer for providing a voltage for operating the buzzer 301.
The alarm module 300 is configured to output a corresponding indication signal according to a control instruction output by the controller 100 when the anti-theft device 1000 enters different working states. The indication signal is provided in a sounding mode, for example, when the anti-theft state is entered, B I-B I-B I three-sound prompt signals are output, wherein the sound interval is two hundred milliseconds, and the anti-theft device 1000 is prompted to enter the anti-theft state; when the alarm state is entered, sixty-sound alarm sound is output. It should be understood that the number of times and the time interval of the prompting sound can be set according to needs; in addition, the alarm module 300 may also emit light to indicate that the anti-theft device 1000 enters a corresponding operating state.
The utility model discloses a ripple anti-theft device 1000 still is equipped with the protection module 700 including overvoltage crowbar and voltage stabilizing circuit to damage corresponding device when avoiding battery 2000 to export great voltage.
Referring to fig. 6 and 7, as a second aspect, the present invention also relates to the above-described ripple detection theft prevention method (hereinafter, referred to as "theft prevention method") which is implemented by the above-described theft prevention device 1000.
The anti-theft method comprises the following steps:
s100: whether the vehicle is in the start state is judged by detecting the ripple variation of the battery 2000.
S200: when the vehicle is in the non-activated state, a vibration state of the vehicle is detected.
S300: and combining the non-starting state and the vibration state of the vehicle, and enabling the anti-theft state to enter a corresponding working state.
S400: and outputting a corresponding indication signal to indicate that the anti-theft device 1000 enters a corresponding working state. Specifically, the controller 100 outputs a corresponding control command to the alarm module 300 according to different working states of the anti-theft state and the alarm state, so as to drive the alarm module 300 to output a corresponding indication signal.
The step S100 of judging whether the vehicle is in the starting state or not by detecting the ripple change of the storage battery 2000 specifically comprises the following steps:
s101: detecting the voltage of the battery 2000;
s102: judging whether a large ripple is generated or not, and judging whether the voltage duration time of the large ripple exceeds a third preset time length or not, wherein the third preset time length can be set to be more than two seconds as required;
when a large ripple is generated and the voltage duration of the large ripple exceeds a third preset time period, for example, two seconds, S103 is executed, and it is determined that the vehicle is in a starting state; otherwise, S104 is executed, and the vehicle is judged to be in the non-starting state.
The ripple detection module 200 detects the voltage of the battery 2000 and outputs a ripple voltage signal to the controller 100, where the ripple voltage signal is a small ripple when the ripple voltage signal is at a low level; when the ripple voltage signal is high, it is a large ripple.
The step of detecting the ripple of the battery 2000 and outputting the ripple voltage signal specifically includes:
acquiring the voltage of the storage battery 2000 and extracting ripple voltage, specifically, accessing the voltage of the storage battery 2000 through a voltage input end, and isolating the direct current component of the voltage through a capacitor;
amplifying the ripple voltage, specifically amplifying the ripple voltage of the battery 2000 by an amplifying circuit composed of two stages of amplifying units, and providing the amplified ripple voltage to a post-stage circuit;
and comparing the ripple voltage with a reference voltage, outputting a high-level ripple voltage signal when the amplified ripple voltage is greater than the reference voltage, and outputting a low-level ripple voltage signal when the amplified ripple voltage is less than the reference voltage. The reference voltage is provided by a reference voltage generating unit with a voltage dividing circuit.
Specifically, step S300: the anti-theft state enters a corresponding working state by combining the non-starting state and the vibration state of the vehicle, and the anti-theft method specifically comprises the following steps:
s301: judging whether the vehicle vibrates;
s302: when it is detected that the vehicle does not vibrate, the controller drives the anti-theft device 1000 to enter an anti-theft state;
s303: when the vehicle is detected to vibrate, the controller drives the anti-theft device 1000 to enter an alarm state.
The step of detecting the vibration state of the vehicle is specifically implemented by a vibration sensing module in the anti-theft device 1000, the vibration sensing module senses the vibration state of the vehicle, and a high-level vibration signal is output when the vehicle vibrates; or the wireless communication module in the anti-theft device 1000 receives a vibration signal from an external device to determine whether the vehicle vibrates.
The utility model discloses an anti-theft method judges whether the vehicle is in the starting condition through the ripple that detects battery 2000, combines vehicle vibration state to carry out the action that gets into the theftproof state or get into alarm state again, and the anti-theft method step is few, easily designs and implements to can avoid environmental factor's influence, theftproof effect preferred.
Because the vehicle in service behavior is different, for example the time from vehicle flame-out (that is ripple voltage signal is converted into the low level by the high level) to closing the door is different, in order to reduce unnecessary alarm action to appear in anti-theft device 1000, the utility model discloses an among the anti-theft method, the ripple voltage signal that receives at controller 100 is the low level, and when not receiving vibration signal in predetermineeing for a long time, anti-theft device 1000 just gets into the theftproof state. The preset time comprises a first preset time and a second preset time, and the first preset time is a delay time after the ripple voltage signal is converted from a high level to a low level; and the second preset time length is the detection time length for detecting the vibration state of the vehicle after the time delay is finished.
In a specific application scenario, it is not set that: after detecting that the ripple voltage signal is converted from the high level to the low level, the vibration state of the vehicle is detected after delaying for ten minutes, and after continuously detecting for twenty minutes, if the vehicle is detected not to vibrate, that is, the controller 100 does not receive the vibration signal, the anti-theft device 1000 automatically enters the anti-theft state. Thus, unnecessary warning actions do not occur until the driver and the passenger leave the vehicle and close the door. In other embodiments, the delay time period and the duration detection time period may be set to other time values as desired.
Further, the method also comprises the step of entering an alarm state from the anti-theft state: when the anti-theft device 1000 is in the anti-theft state, if the controller 100 receives the vibration signal, the anti-theft device 1000 enters the alarm state, and the alarm module 300 outputs a corresponding sound signal, for example, the buzzer 301 sounds sixty.
Further, the method also comprises the step of releasing the anti-theft state or the alarm state: when the antitheft device 1000 is in the antitheft state or the alarming state, if the unlocking or locking signal is received, the antitheft state or the alarming state is released, so that the antitheft state or the alarming state can be released by a vehicle user according to an actual situation, such as stopping the output of an alarm sound. When the anti-theft state or the alarm state is released, the buzzer 301 of the alarm module 300 may correspondingly output an audible prompt tone.
In the present embodiment, when the controller 100 receives an unlock signal or a lock signal while the antitheft device 1000 is not in the antitheft state, the antitheft device 1000 does not process the signal. For example, when the vehicle is in the activated state, the antitheft device does not perform any action even if an unlocking or locking signal is received.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a ripple detects anti-theft device, is suitable for and is used for vehicle burglar alarm with the battery connection of vehicle, its characterized in that, including the controller, all ripple detection module and the alarm module of being connected with the controller electricity, wherein:
the ripple detection module is used for being electrically connected with the storage battery so as to detect whether the storage battery generates large ripples and output corresponding ripple voltage signals, wherein the large ripples are ripples of which the voltage values are positioned in a preset interval;
the controller is used for receiving a vibration signal representing the vibration state of the vehicle, responding to the ripple voltage signal, enabling the ripple detection anti-theft device to enter a corresponding anti-theft state or an alarm state and outputting a corresponding control instruction;
and the alarm module is used for receiving the control instruction and outputting a corresponding indication signal.
2. The ripple detection anti-theft device according to claim 1, wherein the ripple detection module includes a voltage input terminal, an amplification circuit and a comparator connected in sequence, the voltage input terminal is configured to be connected to the battery to receive the ripple voltage thereof, the amplification circuit is configured to amplify the ripple voltage, and an output terminal of the comparator is connected to the controller, and is configured to compare the amplified ripple voltage with a reference voltage, and output a high level to the controller when the amplified ripple voltage is greater than the reference voltage, and output a low level to the controller when the amplified ripple voltage is less than the reference voltage.
3. The ripple detection anti-theft device according to claim 2, wherein the amplifying circuit comprises a first-stage amplifying unit and a second-stage amplifying unit connected to each other, the first-stage amplifying unit comprises a triode with a base connected to a voltage input terminal, the second-stage amplifying unit comprises an operational amplifier with a non-inverting input terminal connected to a collector of the triode via a capacitor, and an output terminal of the operational amplifier is connected to a non-inverting input terminal of the comparator.
4. The ripple detection anti-theft device according to claim 2, wherein a voltage boost circuit and a capacitor are connected in sequence between the voltage input terminal and the amplification circuit.
5. The ripple detection anti-theft device according to claim 1, further comprising a vibration sensing module electrically connected to the controller for detecting whether the vehicle vibrates and outputting the vibration signal thereto when the vehicle vibration is detected.
6. The ripple detection anti-theft device according to claim 5, wherein the vibration sensing module comprises a vibration sensor and/or an acceleration sensor and a matching circuit thereof, the matching circuit being electrically connected with the controller.
7. The ripple detection anti-theft device according to claim 1, further comprising a wireless communication module electrically connected to the controller, the wireless communication module being configured to receive the vibration signal sent thereto by an external device and output the vibration signal to the controller.
8. The ripple detection anti-theft device according to claim 1, further comprising a housing and a circuit board disposed in the housing, wherein the controller, the ripple detection module and the alarm module are disposed on the circuit board.
9. The ripple detection anti-theft device according to claim 8, wherein a vibration sensing module and a wireless communication module are further provided on the circuit board, and are electrically connected to the controller.
10. The ripple detection anti-theft device according to claim 8, wherein the housing comprises an upper shell and a lower shell, one of the upper shell and the lower shell is provided with a hook, and the other of the upper shell and the lower shell is provided with a clamping groove which is in snap fit with the hook.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921149760.3U CN210271145U (en) | 2019-07-19 | 2019-07-19 | Ripple wave detection anti-theft device |
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| CN201921149760.3U CN210271145U (en) | 2019-07-19 | 2019-07-19 | Ripple wave detection anti-theft device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110491059A (en) * | 2019-07-19 | 2019-11-22 | 铁将军汽车电子股份有限公司 | Ripple detects anti-theft device and ripple detects theft preventing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110491059A (en) * | 2019-07-19 | 2019-11-22 | 铁将军汽车电子股份有限公司 | Ripple detects anti-theft device and ripple detects theft preventing method |
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