CN211809565U - Reliable and stable brake detection circuitry - Google Patents
Reliable and stable brake detection circuitry Download PDFInfo
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- CN211809565U CN211809565U CN201922222865.3U CN201922222865U CN211809565U CN 211809565 U CN211809565 U CN 211809565U CN 201922222865 U CN201922222865 U CN 201922222865U CN 211809565 U CN211809565 U CN 211809565U
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 2
- 238000012031 short term test Methods 0.000 description 1
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Abstract
The utility model provides a stable and reliable brake detection circuit, the brake end is connected with test point TP1, resistance R1, triode Q1 in proper order; the upper end of the right side of the triode Q1 is sequentially connected with a resistor R2, a test point TP2 and a hand brake end; the lower end of the right side of the triode Q1 is grounded; a diode D1 is connected in parallel between the test point TP1 and the resistor R1, and the resistor R3 and the power line SYS are sequentially connected to the diode D1; a resistor R4 is connected in parallel between the resistor R2 and the triode Q1 and then grounded; a resistor R5 and a capacitor C1 are sequentially connected in parallel between the triode Q1 and the resistor R2, the upper end of the resistor R5 is connected with a power line SYS, and the lower end of the capacitor C1 is grounded. The circuit can be applied to brake detection circuits of trucks and cars. The circuit has the advantages of simple design, low cost, reliable performance, strong anti-interference performance and popularization.
Description
Technical Field
The utility model relates to an automobile brake technical field especially relates to a reliable and stable brake detection circuitry.
Background
In the vehicle-mounted sound system of a large truck, the vehicle is not allowed to open a video screen signal of a multimedia entertainment system in the running process, only can listen to music and cannot see videos, and the purpose is to prevent the judgment of a driver from being interfered in the driving process and improve the driving safety. Therefore, a set of detection circuit needs to be added to the vehicle-mounted multimedia system to judge whether the truck is in a braking state or not.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reliable and stable brake detection circuitry judges brake braking state through triode short-term test level signal, improves the security of driving.
The utility model provides a stable and reliable brake detection circuit, the brake end is connected with test point TP1, resistance R1, triode Q1 in proper order; the upper end of the right side of the triode Q1 is sequentially connected with a resistor R2, a test point TP2 and a hand brake end; the lower end of the right side of the triode Q1 is grounded; a diode D1 is connected in parallel between the test point TP1 and the resistor R1, and the resistor R3 and the power line SYS are sequentially connected to the diode D1; a resistor R4 is connected in parallel between the resistor R2 and the triode Q1 and then grounded; a resistor R5 and a capacitor C1 are sequentially connected in parallel between the triode Q1 and the resistor R2, the upper end of the resistor R5 is connected with a power line SYS, and the lower end of the capacitor C1 is grounded.
The further improvement lies in that: the power supply line SYS is 3.3V.
The further improvement lies in that: diode D1 is IN 4148; the transistor Q1 is BC 846B.
The further improvement lies in that: the resistance R1 is 10K/+/-5%; the resistance R2 is 1K/+/-1%; the resistance R3 is 10K/+/-1%; the resistance R4 is 47K/+/-5%; the resistance R5 is 1K/+ -1%.
The further improvement lies in that: the capacitance C1 is 100 Nf/50V.
The utility model has the advantages that: when the hand brake is not pulled, the voltage of the hand brake is 0V, namely the voltage on TP2 is 0V, and the single chip microcomputer I/O can detect the low level signal. When the hand brake is pulled up, the brake end is short-circuited to the ground, the base electrode of the triode Q15 is at 0V voltage, the triode Q15 is in a cut-off state, the collector of Q15 is at 3.3V voltage, namely the voltage on TP2 is 3.3V, and the I/O port of the singlechip detects that the level is a high level signal; the diode D1 plays a role in protection, and when a brake signal from a truck has larger interference positive pulse, the diode is cut off, so that the pulse signal is ensured not to influence the stability of SYS3.3V voltage; the circuit can be applied to brake detection circuits of trucks and cars. The circuit has the advantages of simple design, low cost, reliable performance, strong anti-interference performance and popularization.
Drawings
Fig. 1 is a front view of the present invention.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be described in detail with reference to the following embodiments, which are only used for explaining the present invention and do not limit the protection scope of the present invention.
As shown in fig. 1, in this embodiment, a stable and reliable brake detection circuit is provided, and a brake end is sequentially connected to a test point TP1, a resistor R1, and a transistor Q1; the upper end of the right side of the triode Q1 is sequentially connected with a resistor R2, a test point TP2 and a hand brake end; the lower end of the right side of the triode Q1 is grounded; a diode D1 is connected in parallel between the test point TP1 and the resistor R1, and the resistor R3 and the power line SYS are sequentially connected to the diode D1; a resistor R4 is connected in parallel between the resistor R2 and the triode Q1 and then grounded; a resistor R5 and a capacitor C1 are sequentially connected in parallel between the triode Q1 and the resistor R2, the upper end of the resistor R5 is connected with a power line SYS, and the lower end of the capacitor C1 is grounded. The power supply line SYS is 3.3V. Diode D1 is IN 4148; the transistor Q1 is BC 846B. The resistance R1 is 10K/+/-5%; the resistance R2 is 1K/+/-1%; the resistance R3 is 10K/+/-1%; the resistance R4 is 47K/+/-5%; the resistance R5 is 1K/+ -1%. The capacitance C1 is 100 Nf/50V.
When the HAND BRAKE is not pulled, the voltage of the HAND BRAKE terminal is 0V, namely the voltage on TP2 is 0V, and the single chip microcomputer I/O can detect the low level signal. When the hand brake is pulled up, the brake end is short-circuited to the ground, the base electrode of the triode Q15 is at 0V voltage, the triode Q15 is in a cut-off state, the collector of Q15 is at 3.3V voltage, namely the voltage on TP2 is 3.3V, and the I/O port of the singlechip detects that the level is a high level signal; the circuit can be applied to brake detection circuits of trucks and cars. The circuit has the advantages of simple design, low cost, reliable performance, strong anti-interference performance and popularization.
Claims (5)
1. The utility model provides a reliable and stable brake detection circuitry which characterized in that: the brake end is sequentially connected with a test point TP1, a resistor R1 and a triode Q1; the upper end of the right side of the triode Q1 is sequentially connected with a resistor R2, a test point TP2 and a hand brake end; the lower end of the right side of the triode Q1 is grounded; a diode D1 is connected in parallel between the test point TP1 and the resistor R1, and the resistor R3 and the power line SYS are sequentially connected to the diode D1; a resistor R4 is connected in parallel between the resistor R2 and the triode Q1 and then grounded; a resistor R5 and a capacitor C1 are sequentially connected in parallel between the triode Q1 and the resistor R2, the upper end of the resistor R5 is connected with a power line SYS, and the lower end of the capacitor C1 is grounded.
2. A stable and reliable brake detection circuit as claimed in claim 1, wherein: the power supply line SYS is 3.3V.
3. A stable and reliable brake detection circuit as claimed in claim 1, wherein: diode D1 is IN 4148; the transistor Q1 is BC 846B.
4. A stable and reliable brake detection circuit as claimed in claim 1, wherein: the resistance R1 is 10K/+/-5%; the resistance R2 is 1K/+/-1%; the resistance R3 is 10K/+/-1%; the resistance R4 is 47K/+/-5%; the resistance R5 is 1K/+ -1%.
5. A stable and reliable brake detection circuit as claimed in claim 1, wherein: the capacitance C1 is 100 Nf/50V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922222865.3U CN211809565U (en) | 2019-12-12 | 2019-12-12 | Reliable and stable brake detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922222865.3U CN211809565U (en) | 2019-12-12 | 2019-12-12 | Reliable and stable brake detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211809565U true CN211809565U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922222865.3U Active CN211809565U (en) | 2019-12-12 | 2019-12-12 | Reliable and stable brake detection circuitry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038473A (en) * | 2019-12-12 | 2020-04-21 | 芜湖宏景电子股份有限公司 | A Stable and Reliable Brake Detection Circuit |
| CN114475558A (en) * | 2022-02-11 | 2022-05-13 | 芜湖宏景电子股份有限公司 | Reliable and stable brake detection circuitry |
-
2019
- 2019-12-12 CN CN201922222865.3U patent/CN211809565U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038473A (en) * | 2019-12-12 | 2020-04-21 | 芜湖宏景电子股份有限公司 | A Stable and Reliable Brake Detection Circuit |
| CN114475558A (en) * | 2022-02-11 | 2022-05-13 | 芜湖宏景电子股份有限公司 | Reliable and stable brake detection circuitry |
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