CN216817458U - Vehicle-mounted terminal - Google Patents
Vehicle-mounted terminal Download PDFInfo
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- CN216817458U CN216817458U CN202122561732.6U CN202122561732U CN216817458U CN 216817458 U CN216817458 U CN 216817458U CN 202122561732 U CN202122561732 U CN 202122561732U CN 216817458 U CN216817458 U CN 216817458U
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Abstract
The application discloses vehicle-mounted terminal, vehicle-mounted terminal include first contact, first pull-up resistance and level detection circuit, and the second contact is connected with the target vehicle, and first contact constitutes the switch with the second contact, is connected with the power through first pull-up resistance. If the first contact is connected with the second contact, which is equivalent to the fact that a switch formed by the first contact and the second contact is closed, the first pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and at the moment, the vehicle-mounted terminal is successfully connected with the target vehicle; if the first contact and the second contact are not connected, the switch formed by the first contact and the second contact is disconnected, the level detection circuit cannot detect the high level, and the connection between the vehicle-mounted terminal and the target vehicle fails. Therefore, the first contact and the second contact form a switch, whether the vehicle-mounted terminal is successfully connected with the target vehicle or not is determined through the on-off of the circuit, the price of the contact element is lower than that of the sensor element, and the cost of the vehicle-mounted terminal is further reduced.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a vehicle-mounted terminal.
Background
In order to collect vehicle data, a large number of vehicle-mounted terminals, such as an On Board Diagnostics (OBD), a label machine, a smart car machine, a load sensor, a predictive cruise terminal, etc., are installed On a vehicle. Taking the OBD as an example, the OBD is used for monitoring the running condition of the engine, the working state of the exhaust gas treatment system and the like, and once the situation that the emission possibly exceeds the standard is found, a warning is sent out immediately. Particularly, with the further tightening of the national six standards, the national six standards require heavy vehicle manufacturers to install OBD, and the collected vehicle data will be finally imported into relevant platforms such as networking platforms of the department of ecological environment.
If the connection between the vehicle-mounted terminal and the vehicle is disconnected, the vehicle-mounted terminal cannot collect vehicle data and further cannot upload the vehicle data to a related platform, related departments cannot know the condition of the vehicle, and a driver may be subjected to penalties such as fine money. In the related art, it is general to detect whether or not the in-vehicle terminal is connected to the vehicle using a sensor element.
However, this leads to a high price of the in-vehicle terminal due to the high price of the sensor element.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present application provides a vehicle-mounted terminal for detecting whether the vehicle-mounted terminal is connected to a vehicle, and the cost can be reduced.
Based on this, the embodiment of the application discloses the following technical scheme:
on the one hand, this application embodiment provides a vehicle mounted terminal, vehicle mounted terminal is including preventing disconnected warning circuit, prevent disconnected warning circuit and include: the system comprises a first contact, a first pull-up resistor and a level detection circuit, wherein a second contact connected with a target vehicle and the first contact form a switch and are connected with a first power supply through the first pull-up resistor;
when the first contact is connected with the second contact, the first pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and the vehicle-mounted terminal is successfully connected with the target vehicle;
when the first contact and the second contact are not connected, the level detection circuit cannot detect the level, the vehicle-mounted terminal fails to be connected with the target vehicle, and an alarm is given out.
Optionally, the vehicle-mounted terminal further includes a transfer module, a first end of the transfer module is connected to the target vehicle, and a second end of the transfer module includes the second contact.
Optionally, the number of the first contacts is n, and the number of the second contacts is n.
Optionally, the vehicle-mounted terminal further includes a tamper alarm circuit.
Optionally, the tamper alarm circuit includes: a light sensitive sensor on the PCB;
when the photosensitive sensor detects an electrical signal, the housing of the PCB is disassembled.
Optionally, the tamper alarm circuit includes: the vehicle-mounted terminal comprises a second pull-up resistor, a third contact and a fourth contact, wherein the third contact is positioned on a Printed Circuit Board (PCB) of the vehicle-mounted terminal, the fourth contact is positioned on a shell of the PCB, and the third contact and the fourth contact form a switch and are connected with a second power supply through the second pull-up resistor;
when the third contact and the fourth contact are connected, the second pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and the shell of the PCB is not dismounted;
when the third contact and the fourth contact are disconnected, the level detection circuit cannot detect the level, the shell of the PCB is disassembled, and an alarm is given out.
Optionally, the number of the third contacts is m, and the number of the fourth contacts is m.
Optionally, the vehicle-mounted terminal further includes a sending module, and the sending module is configured to send a result detected by the level detection circuit.
Optionally, the result is defined by a byte in the data stream, a first bit in the byte is used to identify a connection status of the first contact and the second contact, and a second bit in the byte is used to identify a connection status of the third contact and the fourth contact.
Optionally, one or more of the first contact, the second contact, the third contact and the fourth contact is a U-shaped elastic sheet.
Compared with the prior art, the technical scheme of the application has the advantages that:
the vehicle-mounted terminal comprises a first contact, a first pull-up resistor and a level detection circuit, wherein a second contact is connected with a target vehicle, the first contact and the second contact form a switch, and the switch is connected with a power supply through the first pull-up resistor. If the first contact is connected with the second contact, which is equivalent to the fact that a switch formed by the first contact and the second contact is closed, the first pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and at the moment, the vehicle-mounted terminal is successfully connected with the target vehicle; if the first contact and the second contact are not connected, the switch formed by the first contact and the second contact is disconnected, the level detection circuit cannot detect the high level, and the connection between the vehicle-mounted terminal and the target vehicle fails. Therefore, the first contact and the second contact form a switch, whether the vehicle-mounted terminal is successfully connected with the target vehicle or not is determined through the on-off of the circuit, the price of the contact element is lower than that of the sensor element, and the cost of the vehicle-mounted terminal is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an anti-break alarm circuit of a vehicle-mounted terminal provided in the present application;
fig. 2 is a top view of a patching module according to an embodiment of the present application;
fig. 3 is a front view of a patching module provided by an embodiment of the present application;
fig. 4 is a front view of a terminal fitting of a vehicle-mounted terminal according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a breakage-proof and disassembly-proof alarm circuit of a vehicle-mounted terminal according to an embodiment of the present disclosure;
fig. 6 is a top view of a terminal connector and a PCB according to an embodiment of the present disclosure;
fig. 7 is a top view of a PCB housing provided in an embodiment of the present application;
FIG. 8 is a top view of a PCB mounting enclosure provided in an embodiment of the present application;
fig. 9 is a top view of a PCB mounting housing according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
A vehicle-mounted terminal provided in an embodiment of the present application is described below with reference to fig. 1. It should be noted that the vehicle-mounted terminal provided in the embodiment of the present application not only can implement a function corresponding to the vehicle-mounted terminal, but also includes a disconnection-preventing alarm circuit, which is specifically described below.
Referring to fig. 1, the drawing is a schematic diagram of an anti-break alarm circuit of a vehicle-mounted terminal provided by the present application. The anti-break alarm circuit comprises a first contact A, a first pull-up resistor R1 and a level detection circuit D. Before the implementation principle of the anti-break alarm circuit is introduced, the second contact B will be explained.
The second contact B is connected to a target vehicle, which is a vehicle to which the in-vehicle terminal is connected. The present embodiment does not specifically limit the connection mode of the second contact B to the target vehicle, and two modes will be described as examples below.
The first method is as follows: and transforming the target vehicle, and adding a second contact B on an interface of the target vehicle connected with the vehicle-mounted terminal.
The second method comprises the following steps: the vehicle-mounted terminal is provided with a switching module, the switching module is a module for connecting the vehicle-mounted terminal with a target vehicle, namely, a first end of the switching module is connected with the target vehicle, a second end of the switching module is connected with other parts of the vehicle-mounted terminal, and a second contact B is added on the second end. Compared with the first mode, the mode does not need to transform a target vehicle, and is convenient and simple.
Taking an on-board terminal as an OBD as an example, refer to fig. 2, which is a top view of a patching module provided in an embodiment of the present application, and refer to fig. 3, which is a front view of a patching module provided in an embodiment of the present application. In fig. 3, a second contact B is shown in an elliptical dotted line, and an arrow indicates a partially enlarged view of the second contact B.
After the second contact B is introduced, the first contact a will be explained below. Referring to fig. 4, the figure is a front view of a terminal fitting of a vehicle-mounted terminal according to an embodiment of the present application. The terminal connector includes a first contact a, and the embodiment of the present application does not specifically limit the size and the positional relationship of the first contact a and the second contact B, and when the terminal connector is connected to a target vehicle (see the foregoing first manner) or a transfer module (see the foregoing second manner), the first contact a and the second contact B may be connected.
The material of the first contact a is a conductive material. As a possible implementation manner, the first contact a may be a metal spring, and further, the first contact a may be a U-shaped spring.
After the first contact a and the second contact B have been described, the implementation principle of the disconnection-prevention alarm circuit will be described below.
With reference to fig. 1, after the first contact a and the second contact B form a switch, one end of the switch is grounded, the other end of the switch is connected to a first power source VCC1 through a first pull-up resistor R1, and the level detection circuit is used for detecting whether the circuit is turned on.
Specifically, when the first contact a is connected with the second contact B, the switch formed by the first contact a and the second contact B is closed, the circuit is turned on, the first pull-up resistor R1 clamps the potential at a high level, the level detection circuit D can detect the high level, and the vehicle-mounted terminal is successfully connected with the target vehicle.
When the first contact a and the second contact B are not connected, the switch formed by the first contact a and the second contact B is opened, and at this time, the circuit is broken, and the level detection circuit D cannot detect the level signal. At the moment, the connection between the vehicle-mounted terminal and the target vehicle fails, and an alarm prompt is sent out so that a driver can debug the connection relation between the vehicle-mounted terminal and the target vehicle again.
As a possible implementation manner, the number of the first contacts a and the second contacts B may be multiple, such as n, and the number of the first contacts a is equal to the number of the second contacts B, so as to avoid that when a problem occurs in connection of one group of the first contacts a and the second contacts B, the other groups of the first contacts a and the second contacts B can continue to detect. Therefore, the accuracy of detecting whether the connection between the vehicle-mounted terminal and the target vehicle is disconnected or not is improved through the connection of the multiple groups of first contacts and second contacts.
The vehicle-mounted terminal comprises a first contact, a first pull-up resistor and a level detection circuit, wherein a second contact is connected with a target vehicle, the first contact and the second contact form a switch, and the first contact is connected with a first power supply through the first pull-up resistor. If the first contact is connected with the second contact, which is equivalent to the fact that a switch formed by the first contact and the second contact is closed, the first pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and at the moment, the vehicle-mounted terminal is successfully connected with the target vehicle; if the first contact and the second contact are not connected, the switch formed by the first contact and the second contact is disconnected, the level detection circuit cannot detect the high level, and the connection between the vehicle-mounted terminal and the target vehicle fails. Therefore, the first contact and the second contact form a switch, whether the vehicle-mounted terminal is successfully connected with the target vehicle or not is determined through on-off of the circuit, and the price of the contact element is lower than that of the sensor element, so that the cost of the vehicle-mounted terminal is reduced.
The driver may tamper with the circuitry in the vehicle terminal and create spurious vehicle data to be uploaded to the relevant platform, thereby avoiding supervision by the relevant authorities. In order to avoid the situation, the embodiment of the application also provides the vehicle-mounted terminal comprising the anti-disassembly alarm circuit.
Referring to fig. 5, the drawing is a schematic diagram of a disconnection-prevention and detachment-prevention alarm circuit of a vehicle-mounted terminal according to an embodiment of the present application. The breakage-proof and disassembly-proof alarm circuit is formed by adding a disassembly-proof alarm circuit with a disassembly-proof detection function on the basis of the disassembly-proof alarm circuit shown in fig. 1, wherein the disassembly-proof alarm circuit comprises a second pull-up resistor R2, a third contact C and a fourth contact D. Before describing the implementation principle of the tamper alarm circuit, the third contact C and the fourth contact D will be described.
Referring to fig. 6, a top view of a terminal connector and a PCB according to an embodiment of the present application is shown. As a possible implementation manner, the number of the third contacts C may be multiple, such as m, and it should be noted that the size of m and n is not specifically limited in the embodiment of the present application, and those skilled in the art may set the third contacts C according to actual needs. As shown in fig. 6, m is 4, and a third contact C is provided at the right end of the PCB.
It should be noted that the third contact C is made of a conductive material, and as a possible implementation manner, the third contact C may be a metal elastic sheet, and further, the third contact C may be a U-shaped elastic sheet.
After the third contact C is introduced, the fourth contact D will be explained below. Referring to fig. 7, a top view (perspective view) of a PCB housing according to an embodiment of the present application is shown. The fourth contact D is located the PCB shell, and this application embodiment does not specifically limit the size and the position relation of third contact C and fourth contact D, and after the PCB installation shell, third contact C and fourth contact D can realize connecting. It should be noted that the present application does not specifically limit the mounting manner of the housing of the PCB, for example, the PCB shown in fig. 6 and the housing shown in fig. 7 are mounted together by a snap fit, as shown in fig. 8.
The material of the fourth contact D is a conductive material. As a possible implementation manner, the fourth contact D may be a metal spring, and further, the fourth contact D may be a U-shaped spring, as shown in fig. 9, the fourth contact D is shown in an elliptical dotted line, and an arrow indicates a partial enlarged view of the fourth contact D.
After the third contact C and the fourth contact D are introduced, the implementation principle of the tamper alarm circuit will be explained below.
With reference to fig. 5, after the third contact C and the fourth contact D form a switch, one end of the switch is grounded, the other end of the switch is connected to a second power source VCC2 through a second pull-up resistor R2, and the level detection circuit is configured to detect whether the circuit is turned on.
Specifically, after the PCB is mounted on the housing, the third contact C is connected to the fourth contact D, so that the switch formed by the third contact C and the fourth contact D is closed, the circuit is turned on, the second pull-up resistor R2 clamps the potential at a high level, the level detection circuit D can detect the high level, and the housing of the PCB is not dismounted at this time.
When the third contact C and the fourth contact D are not connected, the switch formed by the third contact C and the fourth contact D is opened, and at this time, the circuit is broken, and the level detection circuit D cannot detect the level signal. At the moment, the shell of the PCB is disassembled, and an alarm prompt is given, so that the relevant platform can focus on the target vehicle and the vehicle data sent by the target vehicle.
As a possible implementation manner, the number of the third contacts C and the fourth contacts D may be multiple, such as m, and the number of the third contacts C is equal to the number of the fourth contacts D, and different sets of the third contacts C and the fourth contacts D are located at different positions of the PCB, such as four corners of the PCB, so as to ensure that the housing of the PCB is not disassembled at the corresponding position, so as to ensure that the vehicle data is not tampered.
As a possible implementation manner, the tamper-proof alarm circuit provided in the embodiment of the present application may further include photosensitive sensors, where the photosensitive sensors are located on the PCB, for example, at four corners of the PCB, so that when the photosensitive sensors detect an electrical signal, the housing of the PCB is opened, so that the photosensitive sensors receive light and convert the light into the electrical signal.
Therefore, the anti-disassembly alarm circuit and the anti-break alarm circuit are installed on the vehicle-mounted terminal, the functions of detecting whether the shell of the PCB is punched or not and whether the vehicle-mounted terminal is correctly connected with a target vehicle or not are achieved, and the cost of the vehicle-mounted terminal is low.
As a possible implementation manner, the vehicle-mounted terminal further includes a sending module, configured to send a result detected by the level detection circuit D, so that the relevant platform determines a connection condition between the first contact and the second contact, and even a connection condition between the third contact and the fourth contact.
As a possible implementation, a byte may be defined in the transmitted data stream, where the first bit is used to identify the connection between the first contact and the second contact, and the second bit is used to identify the connection between the third contact and the fourth contact. It should be noted that the first bit and the second bit of the byte are different bits, not the first two bits.
The following description will be given taking an example in which one byte is 8 bits. Whether the in-vehicle terminal is connected with the target vehicle is indicated by a Bit0 (0 indicates that the connection is successful, and 1 indicates that the connection is failed), and a Bit1 indicates whether the housing of the PCB is disassembled (0 indicates that the housing is not disassembled, and 1 indicates that the housing is disassembled), as shown in table 1.
TABLE 1
As a possible implementation manner, whether the vehicle-mounted terminal is pulled out or not can be further identified through the third Bit of the byte, such as Bit 4. The fourth Bit of the byte identifies that the PCB has been unpacked, e.g., Bit 5.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above-described apparatus embodiments are merely illustrative, and the units and modules described as separate components may or may not be physically separate. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. The vehicle-mounted terminal is characterized by comprising an anti-break alarm circuit, wherein the anti-break alarm circuit comprises: the system comprises a first contact, a first pull-up resistor and a level detection circuit, wherein a second contact connected with a target vehicle and the first contact form a switch and are connected with a first power supply through the first pull-up resistor;
when the first contact is connected with the second contact, the first pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and the vehicle-mounted terminal is successfully connected with the target vehicle;
when the first contact and the second contact are not connected, the level detection circuit cannot detect the level, the vehicle-mounted terminal fails to be connected with the target vehicle, and an alarm is given out.
2. The vehicle terminal of claim 1, further comprising a patching module, a first end of the patching module being connected with the target vehicle, a second end of the patching module including the second contact.
3. The in-vehicle terminal according to claim 1, wherein the number of the first contacts is n, and the number of the second contacts is n.
4. The vehicle terminal of claim 1, further comprising a tamper alarm circuit.
5. The in-vehicle terminal of claim 4, wherein the tamper alarm circuit comprises: a light sensitive sensor on the PCB;
when the photosensor detects an electrical signal, the housing of the PCB is disassembled.
6. The in-vehicle terminal of claim 4, wherein the tamper alarm circuit comprises: the vehicle-mounted terminal comprises a second pull-up resistor, a third contact and a fourth contact, wherein the third contact is positioned on a Printed Circuit Board (PCB) of the vehicle-mounted terminal, the fourth contact is positioned on a shell of the PCB, and the third contact and the fourth contact form a switch and are connected with a second power supply through the second pull-up resistor;
when the third contact and the fourth contact are connected, the second pull-up resistor clamps the electric potential at a high level, the level detection circuit detects the high level, and the shell of the PCB is not dismounted;
when the third contact and the fourth contact are disconnected, the level detection circuit cannot detect the level, the shell of the PCB is disassembled, and an alarm is given out.
7. The vehicle terminal of claim 6, wherein the number of the third contacts is m, and the number of the fourth contacts is m.
8. The vehicle-mounted terminal according to claim 7, further comprising a sending module, wherein the sending module is configured to send a result detected by the level detection circuit.
9. The vehicle terminal of claim 8, wherein the result is defined by a byte in the data stream, a first bit of the byte is used to identify the connection status of the first contact and the second contact, and a second bit of the byte is used to identify the connection status of the third contact and the fourth contact.
10. The vehicle terminal according to any one of claims 6 to 9, wherein one or more of the first contact, the second contact, the third contact and the fourth contact are U-shaped spring pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561732.6U CN216817458U (en) | 2021-10-22 | 2021-10-22 | Vehicle-mounted terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561732.6U CN216817458U (en) | 2021-10-22 | 2021-10-22 | Vehicle-mounted terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216817458U true CN216817458U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122561732.6U Active CN216817458U (en) | 2021-10-22 | 2021-10-22 | Vehicle-mounted terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216817458U (en) |
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2021
- 2021-10-22 CN CN202122561732.6U patent/CN216817458U/en active Active
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