CN112213637B

CN112213637B - Intelligent network automobile fault detection device

Info

Publication number: CN112213637B
Application number: CN202011164623.4A
Authority: CN
Inventors: 白彩盛; 李军; 吴金成; 金安鹏; 蔺海霞; 郝萍
Original assignee: Lanzhou Modern Vocational College
Current assignee: Lanzhou Modern Vocational College
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-05-07
Anticipated expiration: 2040-10-27
Also published as: CN112213637A

Abstract

The invention discloses an intelligent networking automobile fault detection device which effectively solves the problems that maintenance time is inevitably prolonged and maintenance burden is increased when maintenance personnel grope for faults in an automobile charging system. The voltage signal output by the regulator is detected by the voltage sensor U1, the charging current signal of the generator is detected by the current sensor U3, the operational amplifier U2B, the voltage regulator tube D7 and the triode Q3 are respectively arranged for processing to obtain the fault signal of the regulator and the fault signal of the generator, the fault signal is obtained by carrying out OR operation on the fault signal of the regulator and the fault signal of the generator by utilizing the OR gate U4, and the fault signal of the regulator and the fault signal of the generator are respectively represented by utilizing the light emitting diode D4 and the light emitting diode D6, so that the problems that the maintenance time is inevitably prolonged and the maintenance burden is increased when a maintenance worker gropes for the fault in the automobile charging system are solved, and the inexperienced maintenance worker can quickly judge the fault position.

Description

Intelligent network automobile fault detection device

Technical Field

The invention relates to the field of new energy automobiles, in particular to an intelligent networked automobile fault detection device.

Background

The intelligent networked automobile is an organic combination of an automobile networking system and an intelligent automobile, carries advanced vehicle-mounted sensors, controllers, actuators and other devices, integrates modern communication network technology, realizes intelligent information exchange and sharing between the automobile and people, the automobile, roads, backgrounds and the like, realizes safe, comfortable, energy-saving and efficient driving, and is a product of modern science and technology, and the appearance of the intelligent networked automobile is praised every time.

The intelligent networked automobile adopts various modes including fuel, storage battery, solar energy or other hybrid power to provide power for the intelligent networked automobile, when the storage battery and other energy sources are adopted as the hybrid power to provide power for the intelligent networked automobile, the problem that the automobile charging system fails often occurs, so that the automobile does not have enough power to operate the in-automobile system and further influence the travel of an automobile owner, the automobile charging system comprises a generator, a regulator, an ignition switch, a charging indicator lamp and other devices, wherein the regulator is used for regulating the voltage output by the generator, the generator and the regulator are easy to fail, in the prior art, automobile maintenance personnel do not know whether the generator failure or the regulator failure in the automobile charging system is specific, can only search for judgment by virtue of experience and maintenance tools, and the search process inevitably prolongs the maintenance time of the maintenance personnel, the maintenance burden is increased, and it takes longer for inexperienced maintenance personnel to determine a failure.

The present invention therefore provides a new solution to this problem.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an intelligent networked automobile fault detection device, which effectively solves the problems that maintenance personnel inevitably prolong the maintenance time and increase the maintenance burden when searching for faults in an automobile charging system.

The technical scheme includes that the intelligent network-connected automobile fault detection device is used for detecting an automobile charging system and comprises a voltage detection circuit and a current detection circuit, the voltage detection circuit detects a voltage signal output by a regulator through a voltage sensor U1, a comparison result is output through an operational amplifier U2B serving as a comparator, a diode D3 is conducted, a triode Q1 is conducted, the pin connection state of a relay K1 is changed after the triode Q1 is conducted, the current detection circuit is triggered and outputs a voltage signal to a diode D11 in the current detection circuit, the current detection circuit detects a current signal of a generator through a current sensor U3 and converts the charging current signal of the generator into a voltage signal of the generator, and when a voltage stabilizing tube D7 is conducted through the voltage signal of the generator, the diode D11, The diode D8 and the resistor R13 perform OR operation on two signals output by the voltage regulator tube D7 and the triode Q1, and output a regulator fault signal to an I1 pin of the OR gate U4, the triode Q3 is conducted and then outputs a generator fault signal to an I0 pin of the OR gate U4, and a signal output by the OR gate U4 is amplified by the triode Q2, then subjected to voltage stabilization by the controllable precision voltage stabilization source D9, the resistor R17 and the resistor R16 and then output to the ECU.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:

the voltage signal output by the regulator is detected by a voltage sensor U1, the charging current signal of the generator is detected by a current sensor U3, an operational amplifier U2B, a voltage regulator tube D7 and a triode Q3 are respectively arranged for processing the voltage signal and the charging current signal to respectively obtain a regulator fault signal and a generator fault signal, the regulator fault signal and the generator fault signal are subjected to OR operation by an OR gate U4 to obtain the fault signal, the fault signal is subjected to voltage stabilization by the triode Q2 and a controllable precise voltage stabilization source D9, the ECU can conveniently analyze and process the fault of the regulator and the fault of the generator respectively by utilizing the light emitting diode D4 and the light emitting diode D6, so that the problems that maintenance personnel inevitably prolong the maintenance time and increase the maintenance burden when searching for the fault in the automobile charging system are solved, and the inexperienced maintenance personnel can quickly judge the fault.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

An intelligent network-connected automobile fault detection device is applied to a charging system of an intelligent network-connected automobile, and comprises a voltage detection circuit and a current detection circuit, wherein the voltage detection circuit adopts a voltage sensor similar to KCE-VZ01 as a voltage sensor U1 to detect a voltage signal output by a regulator, the current detection circuit adopts a current sensor similar to AHKC-EKAA to detect a charging current signal of a generator, the voltage detection circuit adopts a voltage sensor U1 to detect a voltage signal output by the regulator, when the voltage sensor U1 detects the voltage signal output by the regulator, a resistor R2 is used to transmit the voltage signal to a comparator which is an operational amplifier U2B, and the resistor R3 and the adjustable resistor R4 divide a positive polarity power supply VCC to obtain a peak value of the voltage signal output by the regulator, and the peak value is compared with the voltage signal detected by the voltage sensor U1 in the operational amplifier U2B, at this time, the operational amplifier U2B is used as a comparator, when the operational amplifier U2B is used as a comparator to output a low level, it indicates that the voltage output by the regulator is still at a normal value, at this time, the regulator and the generator are not in fault, when the operational amplifier U2B is used as a comparator to output a high level to turn on the diode D3, it indicates that the regulator or the generator is in fault, the voltage signal turns on the triode Q1, the relay K1 and the light emitting diode D4 are also turned on, the light emitting diode D4 lights to remind the maintenance personnel of the fault of the regulator or the generator, at this time, the pin 3 and the pin 4 of the relay K1 are switched from the off state to the connected state, at this time, the current detection circuit starts to operate, the current sensor U3 starts to detect the charging current signal of the generator, at the same time, the triode Q1 also transmits the voltage signal to the diode D11 in the current detection circuit, the current sensor U3 in the current, a resistor R12 is used for converting a generator charging current signal output by a current sensor U3 into a generator voltage signal, when the generator voltage signal detected by the current sensor U3 cannot conduct one of a voltage regulator tube D7 and a triode Q3, the fault of a regulator in the automobile charging system is indicated, when the generator voltage signal detected by the current sensor U3 conducts a voltage regulator tube D7, the charging current of the generator is over high, the fault of the regulator is proved, at the moment, an OR gate circuit formed by a diode D11, a diode D8 and a resistor R13 is conducted to output a regulator fault signal and output to an I1 pin of an OR gate U4, when the generator voltage signal detected by the current sensor U3 conducts a triode Q3, the charging current of the generator is over low, the fault of the generator is indicated, and the light emitting diode D6 is conducted to start to emit light, reminding maintenance personnel that the generator has a fault, transmitting a generator fault signal to an I0 pin of an OR gate U4, when any one or both of a regulator fault signal and a generator fault signal exist, outputting a high-level signal, namely the fault signal to a triode Q2 by the OR gate U4, amplifying the amplified fault signal, outputting the amplified fault signal to an ECU of the automobile, sampling by a sampling circuit consisting of a resistor R17 and a resistor R16 when the amplitude of the fault signal amplified by the triode Q3 is overlarge, adjusting the fault signal by an adjustable precision voltage source D9 so as to facilitate the analysis of the fault signal by the ECU, reminding a driver that the automobile charging system has a fault and needs to be maintained, solving the problems that the maintenance personnel cannot avoid prolonging the maintenance time and increasing the maintenance burden when feeling the fault in the automobile charging system by using a light emitting diode D4 and a light emitting diode D6, and also enables inexperienced maintenance personnel to quickly judge the fault location;

the voltage detection circuit adopts a voltage sensor similar to KCE-VZ01 as a voltage sensor U1 to detect the voltage signal output by the regulator, when the voltage sensor U1 detects the voltage signal output by the regulator, a resistor R2 is used for transmitting the voltage signal to a comparator which is an operational amplifier U2B, a resistor R3 and an adjustable resistor R4 are used for dividing the positive power VCC to obtain the peak value of the voltage signal which should be output by the regulator, the peak value is generally set to be 15V, the peak value is compared with the voltage signal detected by the voltage sensor U1 in the operational amplifier U2B, when the operational amplifier U2B as the comparator outputs low level, the voltage output by the regulator is still in normal value, the regulator or the generator is not in fault, when the operational amplifier U2B as the comparator outputs high level, a diode D3 is conducted, the regulator or the generator is in fault, then the voltage signal turns on the triode Q1, and then the relay K1 is turned on, at this time, the pin connection state of the relay K1 changes, the pin 3 and the pin 4 of the relay K1 change from the disconnection state to the connection state, at this time, the current detection circuit starts to work, the current sensor U3 starts to detect the charging current signal of the generator, at the same time, the triode Q1 also transmits the voltage signal to the diode D11 in the current detection circuit, and the voltage regulator D1 and the voltage regulator D2 constitute an amplitude limiting circuit to limit the amplitude of the regulator fault signal output by the operational amplifier U2B as a comparator, the resistor R1, the capacitor C1 and the capacitor C2 filter the ripple existing in the positive polarity power source VCC to avoid affecting the voltage signal detected by the voltage sensor U1, including the voltage sensor U1, the VCC pin of the voltage sensor U1 is respectively connected with one end of the resistor R1, one end of the capacitor C1, one end of the relay K1, the other end of the resistor R1 is respectively connected with one end of a capacitor C2, one end of a resistor R3, the cathode of a diode D1 and is connected with a positive polarity power supply VCC, one end of a diode D5 and a pin 1 of a relay K1, the other end of the capacitor C1 is respectively connected with the other end of a capacitor C2, a gnd pin of a voltage sensor U1, an adjustable end of an adjustable resistor R4, the left end of an adjustable resistor R4, the cathode of a diode D2 and the emitter of a triode Q1 and is grounded, an out pin of a voltage sensor U1 meets one end of the resistor R2, the other end of the resistor R2 is connected with the same phase end of an operational amplifier U2 2, the inverting end of the operational amplifier U2 2 is respectively connected with the other end of the resistor R2 and the right end of the adjustable resistor R2, the output end of the operational amplifier U2 2 is connected with the anode of the diode D2, the cathode of the diode D2 is respectively connected with one end of the resistor R2, the anode of the diode D2, the base of the triode, the collector of the triode Q1 is respectively connected with the 2 pin of the relay K1 and the anode of the voltage regulator tube D5;

the current detection circuit is triggered by a relay K1 in the voltage detection circuit to start detecting a charging current signal of a generator in an automobile charging system, and a resistor R12 is utilized to convert the generator charging current signal output by a current sensor U3 into a generator voltage signal, wherein the current sensor U3 is a current sensor with a model similar to AHKC-EKAA, when a voltage regulator tube D7 is conducted by the generator voltage signal detected by the current sensor U3, the charging current of the generator is over-high due to over-high or out-of-control of the generator voltage is indicated, the regulator is indicated to have a fault, at the moment, an OR gate circuit formed by a diode D11, a diode D8 and a resistor R13 is conducted to output a regulator fault signal and output to an I1 pin of an OR gate U4, at the moment, a light emitting diode D4 is conducted to start emitting light to remind maintenance personnel of the regulator fault, when a generator voltage signal detected by the current sensor U3 conducts a triode Q3, the charging current of the generator is over-low, the generator is in fault, and the light emitting diode D6 is conducted to start to emit light to remind maintenance personnel of the fault of the generator, wherein the light emitting diode D6 and the light emitting diode D4 in the voltage detection circuit emit different colors, when the light emitting diode D4 and the light emitting diode D6 both emit light, the fault signal of the generator is transmitted to the I0 pin of the OR gate U4, the fault signal of the regulator is transmitted to the I1 pin of the OR gate U4, when any one or both of the fault signal of the regulator or the fault signal of the generator exist, the OR gate U4 outputs a high-level signal, namely the fault signal to the triode Q2 to be amplified, the resistor R8 and the resistor R9 divide the voltage so as to provide a proper base voltage for the triode Q2, the fault signal after amplification is output to an ECU of an automobile, when the amplitude difference of the fault signal after amplification of a triode Q3 is overlarge, sampling is carried out through a sampling circuit formed by a resistor R17 and a resistor R16, an adjustable precision voltage-stabilizing source D9 adjusts the fault signal so as to facilitate the analysis of the fault signal by the ECU and remind a driver of the fault of an automobile charging system and maintenance, a diode D10 protects an adjustable precision voltage-stabilizing source D10 and prevents short circuit, and the fault signal detection circuit comprises a current sensor U3, a vcc pin of the current sensor U3 is connected with a 4 pin of a relay K1 in a voltage detection circuit, an out pin of the current sensor U3 is connected with one end of the resistor R12, the other end of the resistor R12 is respectively connected with the cathode of a voltage-stabilizing tube D7 and one end of a resistor R15, a gnd pin of the current sensor U3 is respectively connected with one end of the resistor R13, the cathode of a light-emitting diode D4, A pin 2 of a controllable precise voltage-stabilizing source D9, one end of a resistor R10, an adjustable end of an adjustable resistor R16, a left end of an adjustable resistor R16 and one end of a resistor R9 are grounded, the other end of the resistor R15 is respectively connected with one end of a resistor R14 and a base of a triode Q3, a collector of the triode Q3 is respectively connected with a pin I0 of an OR gate U4 and one end of a resistor R11, an emitter of the triode Q3 is connected with the other end of a resistor R14 and is connected with a positive power supply VCC, a cathode of a diode D11 is respectively connected with a cathode of the diode D8, the other end of the resistor R8, an pin I8 of the OR gate U8 and one end of the resistor R8, the other end of the resistor R8 is connected with an anode of the light-emitting diode D8, an anode of the diode D8 is connected with an anode of the voltage-stabilizing tube D8, a collector of the triode Q8 in a voltage detection circuit is respectively connected with an anode of the diode D8, The output end of an or gate U4, the other end of a resistor R8, the other end of a resistor R9 and the base of a triode Q2 are respectively connected with the 2 pin of a relay K1, the other end of a resistor R5, the other end of a resistor R8, one end of a resistor R1, one end of a capacitor C1 and the vcc pin of a voltage sensor U1 of the 3 pin of the relay K1, the collector of a triode Q2 is respectively connected with the other end of a resistor R7 and the 3 pin of a controllable precision voltage-stabilizing source D9, the emitter of the triode Q2 and the other end of a resistor R10, the 3 pin of the controllable precision voltage-stabilizing source D9 is respectively connected with one end of a resistor R17, the cathode of a voltage-stabilizing tube D10 and an ECU, and the 1 pin of the controllable precision voltage-stabilizing source D9 is respectively connected with the other end of a resistor R17, the anode of a diode D10 and the right end of an adjustable resistor R86.

When the invention is used in concrete, a fault detection device is arranged in the automobile charging system, and comprises a voltage detection circuit and a current detection circuit, wherein the voltage detection circuit adopts a voltage sensor U1 to detect a voltage signal output by a regulator, when the voltage sensor U1 detects the voltage signal output by the regulator, a resistor R2 is used for transmitting the voltage signal to an operational amplifier U2B as a comparator, and the resistor R3 and an adjustable resistor R4 divide a positive polarity power supply VCC to obtain a peak value of the voltage signal output by the regulator, the peak value is compared with the voltage signal detected by a voltage sensor U1 in the operational amplifier U2B, when the operational amplifier U2B is used as a comparator, when the operational amplifier U2B is used as a comparator to output a low level, the voltage output by the regulator is still at a normal value, when the regulator and a generator are not in fault, when the operational amplifier U2B is used as a comparator to output high level to conduct the diode D3, the fault of the regulator or the generator is indicated, the voltage signal conducts the triode Q1, the relay K1 is conducted, at the moment, the pin 3 and the pin 4 of the relay K1 are changed from a disconnected state to a connected state, the trigger current detection circuit starts to work, the current sensor U3 starts to detect the charging current signal of the generator, meanwhile, the triode Q1 also transmits the voltage signal to the diode D11 in the current detection circuit, the current sensor U3 in the current detection circuit starts to detect the charging current signal of the generator, the resistor R12 is used for converting the charging current signal of the generator output by the current sensor U3 into a voltage signal of the generator, when the voltage signal of the generator detected by the current sensor U3 conducts the voltage stabilizing tube D7, the charging current of the generator is indicated to be overlarge, when a fault occurs in the regulator, the or gate circuit composed of the diode D11, the diode D8 and the resistor R13 is turned on, a regulator fault signal is output and is output to the pin I1 of the or gate U4, the light emitting diode D4 is turned on and starts to emit light at the same time, a maintenance worker is reminded of the fault of the regulator, when a generator voltage signal detected by the current sensor U3 turns on the triode Q3, the charging current of the generator is indicated to be too small, the generator fault is indicated, the light emitting diode D6 is turned on and starts to emit light, the maintenance worker is reminded of the fault of the generator, wherein the light color emitted by the light emitting diode D6 is not the same as that emitted by the light emitting diode D4 in the voltage detection circuit, the generator fault signal is transmitted to the pin I0 of the or gate U4 at the same time, the regulator fault signal is transmitted to the pin I1 of the or gate U4, and when either or both of the regulator fault signal, the OR gate U4 outputs a high-level signal, namely a fault signal, to the triode Q2 for amplification, the amplified fault signal is output to the ECU of the automobile, when the amplitude difference of the fault signal amplified by the triode Q3 is overlarge, the fault signal is sampled by a sampling circuit consisting of a resistor R17 and a resistor R16, and the adjustable precise voltage-stabilizing source D9 adjusts the fault signal so as to facilitate the analysis of the fault signal by the ECU and remind a driver of the fault of the automobile charging system and the need of maintenance;

Claims

1. An intelligent network-connected automobile fault detection device is characterized in that the fault detection device is used for detecting an automobile charging system and comprises a voltage detection circuit and a current detection circuit, the voltage detection circuit detects a voltage signal output by a regulator by using a voltage sensor U1, the voltage signal is used as a comparator by using an operational amplifier U2B and then outputs a comparison result to conduct a diode D3 and further conduct a triode Q1, the connection state of a pin of a relay K1 is changed after the triode Q1 is conducted, so that the current detection circuit is triggered and outputs a voltage signal to a diode D11 in the current detection circuit, the current detection circuit detects a current signal of a generator by using a current sensor U3 and converts the charging current signal of the generator into a voltage signal of the generator, when a voltage stabilizing tube D7 is conducted by the voltage signal of the generator, the diode D11, a diode D8 and a resistor R13 carry out or operate two signals output by the voltage stabilizing tube D7 and the triode Q1, the fault signal of the regulator is output to an I1 pin of an OR gate U4, the triode Q3 is conducted and then outputs the fault signal of the generator to an I0 pin of an OR gate U4, and the signal output by the OR gate U4 is amplified by a triode Q2, then regulated by a controllable precise voltage-stabilizing source D9, a resistor R17 and a resistor R16 and then output to the ECU;

the voltage detection circuit comprises a voltage sensor U1, a VCC pin of the voltage sensor U1 is respectively connected with one end of a resistor R1, one end of a capacitor C1 and one end of a pin 3 of a relay K1, the other end of a resistor R1 is respectively connected with one end of a capacitor C2, one end of a resistor R3, the negative electrode of a diode D1, the negative electrode of a diode D5 and a pin 1 of a relay K1 and is connected with a positive power supply VCC, the other end of a capacitor C1 is respectively connected with the other end of a capacitor C2, a gnd pin of a voltage sensor U1, an adjustable end of an adjustable resistor R4, the left end of an adjustable resistor R4, the negative electrode of a diode D2 and the emitter of a triode Q1 and is grounded, an out pin of the voltage sensor U1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the same-phase end of an operational amplifier U2 1, the inverted-phase end of the operational amplifier U2 1 is respectively connected with the other end of the resistor R1, the, the negative electrode of the diode D3 is respectively connected with one end of the resistor R6, the positive electrode of the diode D1 and the positive electrode of the diode D2, the other end of the resistor R6 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is respectively connected with the 2 pin of the relay K1 and the positive electrode of the voltage regulator tube D5;

the current detection circuit comprises a current sensor U3, a VCC pin of a current sensor U3 is connected with a 4 pin of a relay K1 in a voltage detection circuit, an out pin of the current sensor U3 is connected with one end of a resistor R12, the other end of a resistor R12 is respectively connected with a negative electrode of a voltage regulator tube D7 and one end of a resistor R15, a gnd pin of a current sensor U3 is respectively connected with one end of a resistor R13, a negative electrode of a light emitting diode D4, a 2 pin of a controllable precision voltage stabilization source D9, one end of a resistor R10, an adjustable end of an adjustable resistor R16, a left end of an adjustable resistor R16 and one end of a resistor R9 and is grounded, the other end of the resistor R15 is respectively connected with one end of a resistor R14 and a base of a triode Q3, a collector of a triode Q3 is respectively connected with an I0 pin of a gate U4 and one end of a resistor R11, an emitter of a triode Q3 is connected with the other, the cathode of the diode D11 is connected to the cathode of the diode D8, the other end of the resistor R13, the pin I1 of the or gate U4, and one end of the resistor R5, the other end of the resistor R5 is connected to the anode of the led D4, the anode of the diode D8 is connected to the anode of the zener diode D7, the other end of the resistor R11 is connected to the anode of the led D6, the anode of the diode D11 is connected to the collector of the transistor Q1, the pin 2 of the relay K1, and the anode of the diode D5 in the voltage detection circuit, or the output end of the gate U5 is connected to one end of the resistor R5, the other end of the resistor R5, the base of the transistor Q5, the other end of the resistor R5, one end of the capacitor C5, one end of the pin 3 of the relay K5, and the vcc pin of the voltage sensor U5, and the collector of the resistor R5 is connected to the other end of the transistor R5, The device comprises a controllable precise voltage-stabilizing source D9, a triode Q2, a resistor R10, a resistor R17, a voltage-stabilizing tube D10, an ECU, a resistor R17, a diode D10, an adjustable resistor R16, a voltage-stabilizing diode D2, a resistor R9, an Electronic Control Unit (ECU), a voltage-stabilizing diode D10, a resistor R3526, an adjustable resistor R16 and a power supply D9.