CN210666778U - OBU prevents tearing open circuit and OBU - Google Patents
OBU prevents tearing open circuit and OBU Download PDFInfo
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- CN210666778U CN210666778U CN201921457892.2U CN201921457892U CN210666778U CN 210666778 U CN210666778 U CN 210666778U CN 201921457892 U CN201921457892 U CN 201921457892U CN 210666778 U CN210666778 U CN 210666778U
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Abstract
The utility model aims at providing a OBU prevents tearing open circuit and OBU, including triggering structure K1 or K2 or K3, pressure sensor S, amplifier P, MCU 'S AD input, beneficial effect lies in, should prevent tearing open circuit peripheral device few, and the circuit is simple, when realizing preventing tearing open the function, breaks away from the reliance that lasts the power supply to the power, further promotes OBU' S the ability of preventing tearing open.
Description
Technical Field
The utility model belongs to the technical field of the charge of not stopping, concretely relates to OBU prevents tearing open circuit and OBU.
Background
The OBU is prevented tearing open and is a device of guarantee ETC system normal charge. The OBU and the vehicle have a corresponding relation, different vehicle types are different in fees required to be paid through a toll station, and the OBU needs to have an anti-disassembly function in order to guarantee the tightness of the electronic toll collection management system.
The OBU prevents tearing open the security and also is one of the necessary condition of guarantee user's property safety, and OBU prevents tearing open the circuit at present stage and mainly adopts mechanical button to press, and the controller prevents tearing open whether to press the state judgement OBU dismantled through detecting, and this kind of scheme is high to the power degree of dependence, needs the power to last the power supply, when the power exhausts and abnormal operation leads to the power to damage, causes to prevent tearing open the inefficacy, can bring unnecessary trouble to ETC system normal charge.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a new OBU prevents tearing open circuit and OBU.
On one hand, the utility model provides an OBU anti-disassembly circuit, solve the problem that OBU anti-disassembly device relies on the power to continue the power supply among the prior art, this OBU anti-disassembly circuit includes action unit, pressure sensor S, amplifying unit, detecting element, wherein the action unit is used for triggering pressure sensor S deformation, pressure sensor S is used for producing the signal, amplifying unit is used for amplifying the signal, detecting element is used for detecting amplifying unit output signal;
the action unit is connected with a pressure sensor S, the pressure sensor S is connected with an amplifying unit, and the amplifying unit is connected with a detection unit.
Further, the action unit comprises a trigger structure K1 or K2 or K3, one end of the trigger structure is connected with the pressure sensor S, and the other end of the trigger structure is placed under external force. The amplifying unit comprises an amplifier P, one end of the amplifier P is connected with the pressure sensor S, and the other end of the amplifier P is connected with the detecting unit.
Furthermore, the detection unit comprises an AD input of the MCU, the AD input of the MCU is connected with the amplification unit, and the AD input of the MCU detects the voltage of the output end of the amplification unit.
On the other hand, the utility model also provides an OBU, including above arbitrary one prevent tearing open the circuit.
The beneficial effects of the utility model reside in that, should prevent tearing open circuit peripheral device few, the circuit is simple, when realizing preventing tearing open the function, breaks away from the reliance that lasts the power supply to the power, further promotes OBU's the ability of preventing tearing open.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is that embodiment 1 of the utility model provides a circuit and OBU schematic diagram are prevented tearing open by OBU.
Fig. 2 is the utility model provides a circuit and OBU schematic diagram are prevented tearing open by OBU that embodiment 2 provided.
Fig. 3 is the utility model provides a circuit and OBU schematic diagram are prevented tearing open by OBU that embodiment 3 provided.
K1, K2 and K3 are trigger structures, S is a pressure sensor, P is an amplifier, and the MCU is the AD input of the detection circuit MCU.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 1 is that the embodiment of the utility model provides a circuit and OBU schematic diagram are prevented tearing open by OBU.
An OBU anti-disassembly circuit comprises an action unit, a pressure sensor S, an amplification unit and a detection unit;
the OBU tamper circuit provided by the present invention will be described in detail with reference to the specific embodiments;
the action unit comprises a trigger structure K1, and the trigger structure K1 is a vertical rod. The initial state of the trigger structure K1 is a bounce state, and when the trigger structure K1 is pressed down, the pressure sensor S is triggered by the trigger structure K1 to output a voltage signal. Meanwhile, the amplifier P amplifies the output signal of the pressure sensor S, the output signal of the amplifier P is transmitted to the AD input of the MCU, and the on-off state of the OBU at the moment is detected by judging the voltage value.
When the trigger structure K1 is pressed down, the pressure sensor S is in a stressed state so as to be in a final pressed state of the trigger structure K1, and the output voltage of the pressure sensor S is used as an anti-disassembly reference value; when the trigger structure K1 bounces, the output voltage of the pressure sensor S does not meet the reference value range, and the MCU is triggered to prevent the detachment and bounces.
After the power supply is lost, the triggering structure K1 bounces and presses, the power supply is provided again, the final voltage value of the pressure sensor S does not meet the reference voltage range, and the MCU is triggered to prevent the detaching and bouncing event.
The influence of external vibration and environmental change on the pressure sensor S meets the requirement of the error range of the reference value of the pressure sensor S.
On the other hand, the embodiment of the utility model provides a still provide an OBU, this OBU contains above embodiment one the OBU prevent tearing open the circuit.
Example two
Fig. 2 is the embodiment of the utility model provides a circuit schematic diagram is prevented tearing open by OBU.
An OBU anti-disassembly circuit comprises an action unit, a pressure sensor S, an amplification unit and a detection unit;
the OBU tamper circuit provided by the present invention will be described in detail with reference to the specific embodiments;
the action unit comprises a trigger structure K2, and the trigger structure K2 is a pressure sensor S connecting shell. The initial state of the trigger structure K2 is a no-pressure state, the trigger structure K2 needs to be attached to an object to be fixed and extruded, an unspecified area on the surface of the pressure sensor S is triggered by the trigger structure K2, the pressure sensor S outputs a signal, meanwhile, the amplifier P receives the output signal of the pressure sensor S, the signal is amplified by the amplifier P and then transmitted to the AD input of the MCU, and the state of the OBU anti-disassembly switch at the moment is detected by judging the magnitude of a voltage value.
When the trigger structure K2 is pressed down, the pressure sensor S is in a stressed state so as to be in a final pressed state of the trigger structure K2, and the output voltage of the pressure sensor S is used as an anti-disassembly reference value; when the trigger structure K2 bounces, the output voltage of the pressure sensor S does not meet the reference value range, and the MCU is triggered to prevent the detaching and bouncing event;
after the power supply is lost, the triggering structure K2 bounces and presses, the power supply is provided again, the final voltage value of the pressure sensor S does not meet the reference voltage range, and the MCU is triggered to prevent the detaching and bouncing event.
The influence of external vibration and environmental change on the pressure sensor S meets the requirement of the error range of the reference value of the pressure sensor S.
On the other hand, the embodiment of the utility model provides a still provide an OBU, this OBU contains above embodiment two the OBU prevent tearing open the circuit.
EXAMPLE III
The OBU tamper circuit provided by the present invention will be described in detail with reference to the specific embodiments;
fig. 3 is the embodiment of the utility model provides a circuit schematic diagram is prevented tearing open by OBU.
An OBU anti-disassembly circuit comprises an action unit, a pressure sensor S, an amplification unit and a detection unit;
the action unit comprises a trigger structure K3, and the trigger structure K3 is a double-contact supporting frame connected with the shell. The initial state of trigger structure K3 is no pressure state, and when trigger structure K3 was extruded, pressure sensor S received trigger structure K3 and triggered, output signal, and simultaneously, amplifier P received pressure sensor S output signal, and the AD input that the signal passed through amplifier P and enlargied the back and transmit for MCU detects OBU at this moment and prevents tearing open switch state through judging the magnitude of voltage value.
When the trigger structure K3 is pressed down, the pressure sensor S is in a stressed state so as to be in a final pressed state of the trigger structure K3, and the output voltage of the pressure sensor S is used as an anti-disassembly reference value; when the trigger structure K3 bounces, the output voltage of the pressure sensor S does not meet the reference value range, and the MCU is triggered to prevent the detaching and bouncing event;
after the power supply is lost, the triggering structure K3 bounces and presses, the power supply is provided again, the final voltage value of the pressure sensor S does not meet the reference voltage range, and the MCU is triggered to prevent the detaching and bouncing event.
The influence of external vibration and environmental change on the pressure sensor S meets the requirement of the error range of the reference value of the pressure sensor S.
On the other hand, the embodiment of the utility model provides a still provide an OBU, this OBU contains above embodiment three the OBU prevent tearing open the circuit.
To sum up, the beneficial effects of the utility model reside in that, it is few to prevent tearing open circuit peripheral device, and the circuit is simple, when realizing preventing tearing open the function, breaks away from the reliance that lasts the power supply to the power, further promotes OBU's the ability of preventing tearing open.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (5)
1. An OBU anti-disassembly circuit is characterized by comprising an action unit, a pressure sensor S, an amplification unit and a detection unit;
the action unit is used for triggering the deformation of the pressure sensor S, the pressure sensor S is used for generating signals, the amplifying unit is used for amplifying the signals, and the detection unit is used for detecting the signals output by the amplifying unit;
the action unit is connected with the pressure sensor S, the pressure sensor S is connected with the amplifying unit, and the amplifying unit is connected with the detection unit.
2. An OBU tamper circuit according to claim 1, wherein the actuating unit comprises a trigger structure K1 or K2 or K3, one end of the trigger structure is connected to the pressure sensor S, and the other end is externally stressed.
3. An OBU tamper circuit according to claim 1, wherein the amplifying unit comprises an amplifier P having one end connected to the pressure sensor S and one end connected to the detecting unit.
4. The OBU tamper circuit of claim 1, wherein the detection unit comprises an AD input of an MCU, the AD input of the MCU being connected to the amplification unit;
and the AD input of the MCU is used for detecting the voltage of the output end of the amplifying unit.
5. An OBU comprising the OBU tamper circuit of any of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457892.2U CN210666778U (en) | 2019-09-02 | 2019-09-02 | OBU prevents tearing open circuit and OBU |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457892.2U CN210666778U (en) | 2019-09-02 | 2019-09-02 | OBU prevents tearing open circuit and OBU |
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| Publication Number | Publication Date |
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| CN210666778U true CN210666778U (en) | 2020-06-02 |
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| CN201921457892.2U Active CN210666778U (en) | 2019-09-02 | 2019-09-02 | OBU prevents tearing open circuit and OBU |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115953889A (en) * | 2023-03-06 | 2023-04-11 | 联宝(合肥)电子科技有限公司 | Tamper-proof function detection method, system, device, equipment and storage medium |
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2019
- 2019-09-02 CN CN201921457892.2U patent/CN210666778U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115953889A (en) * | 2023-03-06 | 2023-04-11 | 联宝(合肥)电子科技有限公司 | Tamper-proof function detection method, system, device, equipment and storage medium |
| CN115953889B (en) * | 2023-03-06 | 2023-07-07 | 联宝(合肥)电子科技有限公司 | Anti-disassembly function detection method, system, device, equipment and storage medium |
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