CN202362438U - System for monitoring condition of brake lamp of vehicle - Google Patents
System for monitoring condition of brake lamp of vehicle Download PDFInfo
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- CN202362438U CN202362438U CN2011204964864U CN201120496486U CN202362438U CN 202362438 U CN202362438 U CN 202362438U CN 2011204964864 U CN2011204964864 U CN 2011204964864U CN 201120496486 U CN201120496486 U CN 201120496486U CN 202362438 U CN202362438 U CN 202362438U
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Abstract
The utility model discloses a system for monitoring condition of a brake lamp of a vehicle. The system comprises an optoelectronic isolator, an operational amplifier, a direct-current transmitter, a current-limiting protective resistor and a brake lamp, wherein one end of a divider resistor is connected with a negative electrode of a 5V power source, and the other end of the divider resistor is connected with a number 3 pin of the optoelectronic isolator; a number 2 pin of the optoelectronic isolator is connected with the negative electrode of a 24V power source; a number 1 pin of the optoelectronic isolator and the VO (voltage output) end of the operational amplifier are connected with one end of a feedback resistor; the other end of the feedback resistor and a negative end of the operational amplifier are connected with one end of an input resistor; the other end of the input resistor and a number 2 grounding resistor are connected with one end of the current-limiting protective resistor; the other end of the current-limiting protective resistor is connected with the positive electrode of the 24V power source; a positive end of the operational amplifier is earthed through a number 1 grounding resistor; the brake lamp is connected between the positive electrode and the negative electrode of the 24V power source in parallel; the direct-current transmitter is sheathed on an electric wire between the positive electrode of the 24V power source and the brake lamp; and the positive end and the negative end of the direct-current transmitter are connected with the electric wires of the positive electrode and the negative electrode of a 12V power source.
Description
Technical field
The utility model relates to a kind of pick-up unit of vehicle detection technical field, and more particularly, the utility model relates to a kind of car brakeing lamp condition monitoring system.
Background technology
Brake lamp be vehicle prevent accident generation, guarantee one of signal of interest device of traffic safety.In recent years; Increase along with China's automobile pollution; The generation of many major traffic accidents all is that the fault of Brake lamp causes; Especially during emergency brake of vehicle, because Brake lamp fault and can not the information that vehicle braked is slowed down promptly and accurately pass to back vehicle, caused pernicious traffic hazard such as knock into the back.
Traditional detection mode mainly contains two kinds: a kind of is at panel board the braking pilot lamp to be installed; This mode can only show the quality of braking light switch; The working condition that can not reflect Brake lamp all sidedly; As when faults such as Brake lamp bad earth, bulb damage took place, the braking pilot lamp of panel board was glittering as usual; Another kind of mode is in the Brake lamp loop, wire break alarm device to be installed, and the reed switch that is used in this mode is prone to take place the faults such as ablation of contact, and functional reliability is low.
For solving the problem that automobile brake lamp detects, the utility model discloses a kind of car brakeing lamp condition monitoring system, overcome the defective of traditional detection mode, realized that the malfunction of automobile brake lamp is quick, accurately detected.
Summary of the invention
The utility model technical matters to be solved is to have overcome the problem that prior art exists, and a kind of car brakeing lamp condition monitoring system is provided.
For solving the problems of the technologies described above, the utility model is to adopt following technical scheme to realize: described car brakeing lamp condition monitoring system comprises model is the photoisolator of TLP521-1, operational amplifier that model is LM158, model is SMI01DCE-P2-O4 DC current transmitter, divider resistance, feedback resistance, No. 1 stake resistance, input resistance, No. 2 stake resistances, current-limiting protection resistance and Brake lamps.
One end of divider resistance is connected with the negative pole OV electric wire of 5V power supply, and the other end of divider resistance and model are that No. 3 pin electric wires that are set to on/off signal output part U1 of the photoisolator of TLP521-1 are connected.Model is that No. 4 pins of the photoisolator of TLP521-1 are connected with the positive electrical wire of 5V power supply; Model is that No. 2 pins of the photoisolator of TLP521-1 are connected with the negative pole OV electric wire of 24V power supply, and model is that No. 1 pin and the model of the photoisolator of TLP521-1 is that the VO end of the operational amplifier of LM158 is connected with an end electric wire of feedback resistance.The other end of feedback resistance and model are that the negative terminal of the operational amplifier of LM158 is connected with an end electric wire of input resistance.The other end of input resistance is connected with an end electric wire of current-limiting protection resistance with No. 2 stake resistances, the other end ground connection of No. 2 stake resistances, and the other end of current-limiting protection resistance is connected with the positive electrical wire of 24V power supply.Model is that the anode of the operational amplifier of LM158 is connected the other end ground connection of No. 1 stake resistance with an end electric wire of No. 1 stake resistance.Model is that the Vcc end of the operational amplifier of LM158 is connected with the positive electrical wire of 5V power supply, and model is the GND end ground connection of the operational amplifier of LM158.The two ends of Brake lamp are connected in parallel on through electric wire between the positive pole and negative pole of 24V power supply, and model is that the DC current transmitter of SMI01DCE-P2-O4 is sleeved on the positive pole and the electric wire between the Brake lamp of 24V power supply.Model is that the negative terminal of the DC current transmitter of SMI01DCE-P2-O4 is connected with the negative electrical wire of 12V power supply, and model is that the anode of the DC current transmitter of SMI01DCE-P2-O4 is connected with the positive electrical wire of 12V power supply.
Divider resistance value described in the technical scheme is 5.1k Ω, and the feedback resistance value is 2M Ω, and No. 1 stake resistance value is that 20K Ω, No. 2 stake resistance values are 5K Ω, and the input resistance value is 2M Ω, and the current-limiting protection resistance value is 19K Ω.
Compared with prior art the beneficial effect of the utility model is:
1. the condition monitoring system of the described car brakeing lamp of the utility model has been realized the real-time detection of car brakeing lamp power supply state.In the on/off testing circuit, operational amplifier LM158 has formed negative-feedback circuit, has improved the system linearity degree; The utilization of TLP521-1 photoisolator has simultaneously realized the electrical isolation of signal input output end, and the one-way transmission of signal, has improved the precision of data acquisition, realizes accurately detecting in real time of Brake lamp power supply state.
2. the condition monitoring system of the described car brakeing lamp of the utility model has been realized the real-time detection of car brakeing lamp failure.Current detection circuit utilization SMI01DCE-P2-O4 type DC current transmitter adopts the mode of punching to be installed in the Brake lamp circuit, realizes the real-time detection of Brake lamp fault through the voltage signal of gathering current transducer output.And this current transducer employing integral structure, saved current transformer, reduced application cost, improved the precision and the reliability of test.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the circuit theory diagrams of the described car brakeing lamp of the utility model condition monitoring system;
Among the figure: A. on/off testing circuit, B. current detection circuit, a. photoisolator, b. operational amplifier; C. DC current transmitter, R1. divider resistance, R2. feedback resistance, R3.1 stake resistance; R4. input resistance, R5.2 stake resistance, R6. current-limiting protection resistance, 1. anode; 2. negative electrode, 3. emitter, 4. collector.
Embodiment
Below in conjunction with accompanying drawing the utility model is explained in detail:
Whether the described car brakeing lamp of the utility model condition monitoring system has been realized the real-time monitoring of Brake lamp state, detect the Brake lamp two ends through on/off testing circuit A and supply power; Realize the detection of Brake lamp fault through current detection circuit B.Simultaneously, the use of photoisolator a, operational amplifier b and DC current transmitter c has improved the precision and the accuracy of system testing.
Consult Fig. 1, the described car brakeing lamp of the utility model condition monitoring system is made up of on/off testing circuit A and current detection circuit B, is connected for electric wire between on/off testing circuit A and the current detection circuit B.
On/off testing circuit A is that the photoisolator a of TLP521-1, operational amplifier b that model is LM158, divider resistance R1, feedback resistance R2, No. 1 stake resistance R3, input resistance R4, No. 2 stake resistance R5 and current-limiting protection resistance R 6 are formed by model mainly.
The end of divider resistance R1 among the on/off testing circuit A is connected with the negative pole OV electric wire of 5V power supply; The other end of divider resistance R1 and model are that No. 3 pins of the photoisolator a of TLP521-1 are that emitter 3 electric wires are connected, and model is that No. 4 pins of the photoisolator a of TLP521-1 are that collector 4 is connected with the positive electrical wire of 5V power supply.Model is that No. 2 pins of the photoisolator a of TLP521-1 are that negative electrode 2 is connected with the negative pole OV electric wire of 24V power supply, and model is that No. 1 pin of the photoisolator a of TLP521-1 be anode 1 with model is that the VO end of the operational amplifier b of LM158 is connected with the end electric wire of feedback resistance R2.The other end of feedback resistance R2 and model are the negative terminal-be connected with the end electric wire of input resistance R4 of the operational amplifier b of LM158; The other end of input resistance R4 is connected with an end electric wire of current-limiting protection resistance R 6 with No. 2 stake resistance R5; The other end ground connection of No. 2 stake resistance R5, the other end of current-limiting protection resistance R 6 is connected with 24V positive source electric wire.Model is the anode+be connected the other end ground connection of No. 1 stake resistance R3 with the end electric wire of No. 1 stake resistance R3 of the operational amplifier b of LM158.Model is that the Vcc end of the operational amplifier b of LM158 is connected with the positive electrical wire of 5V power supply, and model is the GND end ground connection of the operational amplifier b of LM158.
No. 3 pins that with model are the photoisolator a of TLP521-1 are the output terminal U1 that emitter 3 is set to the on/off signal.
Current detection circuit B is that DC current transmitter c and the Brake lamp of SMI01DCE-P2-O4 formed by model mainly.
The core of current detection circuit is that model is the DC current transmitter c of SMI01DCE-P2-O4.Model is that the other end of Brake lamp is connected with the negative electrical wire of 24V power supply between the end of the DC current transmitter c of the SMI01DCE-P2-O4 positive pole and the Brake lamp that are installed in the 24V power supply with the punching mode.In other words, the two ends of Brake lamp are connected in parallel on through electric wire between the positive pole and negative pole of 24V power supply, and model is that the DC current transmitter c of SMI01DCE-P2-O4 is sleeved on the positive pole and the electric wire between the Brake lamp of 24V power supply.Model is the negative terminal-be connected with the negative electrical wire of 12V power supply of the DC current transmitter c of SMI01DCE-P2-O4; Model is the anode+be connected with the positive electrical wire of 12V power supply of the DC current transmitter c of SMI01DCE-P2-O4; Model is that the Vout end of the DC current transmitter c of SMI01DCE-P2-O4 is the signal output part of the DC current transmitter of SMI01DCE-P2-O4 for model, and the Vout end is set to the output terminal U2 of Brake lamp fault-signal simultaneously.
Among the described on/off testing circuit A; Divider resistance R1 value is 5.1k Ω, and feedback resistance R2 value is 2M Ω, and No. 1 stake resistance R3 value is that 20K Ω, No. 2 stake resistance R5 values are 5K Ω; Input resistance R4 value is 2M Ω, and current-limiting protection resistance R 6 values are 19K Ω.
The principle of work of car brakeing lamp condition monitoring system
Consult Fig. 1; Observation circuit schematic diagram according to car brakeing lamp condition monitoring system; Electrical equipments such as model is the photoisolator a of TLP521-1, operational amplifier b that model is LM158, model is SMI01DCE-P2-O4 DC current transmitter c, divider resistance R1, current-limiting protection resistance R 6 are carried out rational deployment, be installed in the circuit of car brakeing lamp.
In the course of work, step on down brake pedal.When the Brake lamp on/off detects; To No. 3 pins (emitter 3) of photoisolator a is that the output signal of output terminal U1 carries out data acquisition, analyzes and learn; If output terminal U1 output voltage is a low level, then the Brake lamp circuit is in off state, the Brake lamp abnormal electrical power supply; If output terminal U1 output voltage is a high level, then the Brake lamp circuit is in channel status, and the Brake lamp power supply is normal.
During the Brake lamp fault condition detection; To the Vout of DC current transmitter c end is that the output signal of output terminal U2 carries out certificate collection, analyzes and learn, is low level as if output terminal U2 output voltage, does not then have electric current to pass through in the Brake lamp circuit; Brake lamp does not work, and is in malfunction; If output terminal U2 output voltage is a high level, then the Brake lamp non-fault is in proper working order.
Claims (2)
1. car brakeing lamp condition monitoring system; It is characterized in that described car brakeing lamp condition monitoring system comprises that model is the photoisolator (a) of TLP521-1, the operational amplifier (b) that model is LM158, DC current transmitter (c), divider resistance (R1), feedback resistance (R2), No. 1 stake resistance (R3), input resistance (R4), No. 2 stake resistances (R5), current-limiting protection resistance (R6) and the Brake lamp that model is SMI01DCE-P2-O4;
One end of divider resistance (R1) is connected with the negative pole OV electric wire of 5V power supply; The other end of divider resistance (R1) and model are that No. 3 pin electric wires that are set to on/off signal output part U1 of the photoisolator (a) of TLP521-1 are connected; Model is that No. 4 pins of the photoisolator (a) of TLP521-1 are connected with the positive electrical wire of 5V power supply; Model is that No. 2 pins of the photoisolator (a) of TLP521-1 are connected with the negative pole OV electric wire of 24V power supply; Model is that No. 1 pin and the model of the photoisolator (a) of TLP521-1 is that the VO end of the operational amplifier (b) of LM158 is connected with an end electric wire of feedback resistance (R2); The other end of feedback resistance (R2) and model are that the negative terminal of the operational amplifier (b) of LM158 is connected with an end electric wire of input resistance (R4); The other end of input resistance (R4) is connected with an end electric wire of current-limiting protection resistance (R6) with No. 2 stake resistances (R5); The other end ground connection of No. 2 stake resistances (R5); The other end of current-limiting protection resistance (R6) is connected with the positive electrical wire of 24V power supply, and model is that the anode of the operational amplifier (b) of LM158 is connected the other end ground connection of No. 1 stake resistance (R3) with an end electric wire of No. 1 stake resistance (R3); Model is that the Vcc end of the operational amplifier (b) of LM158 is connected with the positive electrical wire of 5V power supply; Model is the GND end ground connection of the operational amplifier (b) of LM158, and the two ends of Brake lamp are connected in parallel on through electric wire between the positive pole and negative pole of 24V power supply, and model is that the DC current transmitter (c) of SMI01DCE-P2-O4 is sleeved on the positive pole and the electric wire between the Brake lamp of 24V power supply; Model is that the negative terminal of the DC current transmitter (c) of SMI01DCE-P2-O4 is connected with the negative electrical wire of 12V power supply, and model is that the anode of the DC current transmitter (c) of SMI01DCE-P2-O4 is connected with the positive electrical wire of 12V power supply.
2. according to the described car brakeing lamp of claim 1 condition monitoring system; It is characterized in that; Described divider resistance (R1) value is 5.1k Ω, and feedback resistance (R2) value is 2M Ω, and No. 1 stake resistance (R3) value is that 20K Ω, No. 2 stake resistances (R5) value are 5K Ω; Input resistance (R4) value is 2M Ω, and current-limiting protection resistance (R6) value is 19K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204964864U CN202362438U (en) | 2011-12-04 | 2011-12-04 | System for monitoring condition of brake lamp of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204964864U CN202362438U (en) | 2011-12-04 | 2011-12-04 | System for monitoring condition of brake lamp of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362438U true CN202362438U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204964864U Expired - Fee Related CN202362438U (en) | 2011-12-04 | 2011-12-04 | System for monitoring condition of brake lamp of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495379A (en) * | 2011-12-04 | 2012-06-13 | 吉林大学 | State monitoring system for vehicle brake lamp |
-
2011
- 2011-12-04 CN CN2011204964864U patent/CN202362438U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495379A (en) * | 2011-12-04 | 2012-06-13 | 吉林大学 | State monitoring system for vehicle brake lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20151204 |
|
| EXPY | Termination of patent right or utility model |