CN202883212U - Non-contact type intelligent detector special for ignition - Google Patents
Non-contact type intelligent detector special for ignition Download PDFInfo
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- CN202883212U CN202883212U CN 201220401221 CN201220401221U CN202883212U CN 202883212 U CN202883212 U CN 202883212U CN 201220401221 CN201220401221 CN 201220401221 CN 201220401221 U CN201220401221 U CN 201220401221U CN 202883212 U CN202883212 U CN 202883212U
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Abstract
The utility model relates to a non-contact type intelligent detector special for ignition. The non-contact type intelligent detector special for the ignition is mainly made by connecting a micro controller, a power management circuit, a liquid crystal display circuit, a key processing circuit, a battery voltage detecting circuit, a beaming sensing circuit, an ignition signal collecting circuit and a port circuit. When an engine operates normally, an inductive head is closed to the nearby position of an ignition coil, a secondary ignition signal with not more than 3.3 V of a peak-to-peak value is gained through the inductive head, the micro controller continuously and repeatedly sample an ignition signal peak valve by digital-to-analogue (AD) conversion and gain a sampling valve with a higher accuracy through weighted average, and the sampling signal is multiplied by magnification times to gain an actual spark discharging voltage. The non-contact type intelligent detector special for the ignition has the advantages of being higher in safety, rapid in judgment, high in detecting efficiency and capable of testing out dynamic parameters of operation of the ignition coil without needs of detaching the ignition coil.
Description
Technical field
The utility model relates to the automotive ignition system detection facility, particularly a kind of contactless igniting special intelligent detector.
Background technique
Ignition system is being played the part of extremely important role in automobile dynamic system, and spark coil is as the core component of ignition system, the high pressure (more than 20,000 volts) of enough energy can be provided, light cylinder combustion oil mixed gas, guarantee that motor can continue to turn round efficiently.So the quality of spark coil has directly determined the performance of engine performance.
In the market the spark coil fault is judged and is mainly contained following several method:
Method one, under outage condition, be primary and secondary resistance by multimeter measuring point fire coil static parameter, judge primary and secondary whether have open circuit, short-circuit conditions, whether damage with the decision-point fire coil.
Its shortcoming is: poor accuracy, decision condition is simple, can only test primary and secondary static resistance, and the nominal range of resistance can only obtain by experience accumulation, and the model of spark coil is a lot, and static parameter is also different, often can only go to judge by the experience of service worker, False Rate is high, carries ignition module or the secondary spark coil that diode is housed for inside, loses efficacy with this decision method.
Operability: spark coil need to be separated with other connected elements, in order to measure static parameter.Often carry out actual ignition by the replacing spark coil and test to judge its quality.
The user of service must be the professional technique maintenance man who the working principle of ignition system working principle, spark coil, product external structure, input/output interface is had certain understanding.
Method two, use simulation charging method decision-point fire coil quality.All spark coils are taken off from stand, be connected on the testing apparatus, adjust spray point apart from be 5.5mm, the strong and weak situation of observation spark is with decision-point fire coil fault whether.
Accuracy: decision method is more intuitive and reliable, and accuracy rate is high.But the simulation discharge needs to understand relevant information, such as the spark coil duration of charge, and discharge frequency, whether input/output interface definition, inside carry ignition controler etc.Simulation discharge can only be by spark strong and weak decision-point fire coil fault whether, affected by equipment, environment etc. larger, certain narrow limitation is arranged.
Operability: spark coil need to be disassembled from motor and carry out discharge test, because simulation discharge equipment volume is large and need external AC power supplies, it can only use in the place that AC power supplies is arranged.Especially for COP mode ignition system, need 4 to 6 spark coils of dismounting to carry out successively discharge test.
Applicable crowd: the professional technique maintenance man of certain understanding need to be arranged working principle, product external structure, the input/output interface of ignition system working principle, spark coil, need in case of necessity spark coil producer that technical support and service are provided.
Security: electrion, Security is low.
Cost of material: more than 500 yuan.
Method three, use spark coil special test platform decision-point fire coil quality.Spark coil need to be taken off from stand, be connected on the special test equipment, according to working specification the every dynamic parameters of spark coil be tested.
Accuracy: decision method is complicated, can the every Operational Limits of test point fire coil, and such as spark discharge voltage, sparkover electric current, spark duration, elementary charging current curve, secondary voltage rise time, ignition energy etc.Measurement parameter is accurate, and judgment accuracy is high.
Operability: with simulation discharge test method.
Applicable crowd: with simulation discharge test method.
Security: electrion, Security is low.
Cost of material: expensive, more than 30,000 yuan.
The above several spark coil detecting methods of summary, they have the problem and shortage of the following aspects:
1) judges that efficient is low, need repeatedly the detachment point fire coil to detect and to judge the fault point.
2) applicable professional test personnel only, intelligent degree is low.
3) carry and operate all inconveniences.
4) cost performance is low.
Summary of the invention
The purpose of this utility model is exactly for overcoming the deficiencies in the prior art, problem for present spark coil detection facility, a kind of design proposal of contactless igniting special intelligent detector is provided, make it to realize when the spark coil high-voltage output end discharges, minimizing is to testing apparatus and personnel's injury, improve Security, improve detection efficiency, enlarge using scope, volume-diminished, be easy to carry, improve its cost performance and be convenient to marketing.
The utility model is to realize by such technological scheme: a kind of contactless igniting special intelligent detector, it is characterized in that, mainly be formed by connecting by microcontroller, electric power management circuit, liquid crystal display circuit, keystroke handling circuit, battery voltage detection circuit, light sensing circuit, ignition signal collection circuit, interface circuit; Described microcontroller adopts 16 single-chip microcomputer MSP430F4152 of Texas Instruments; Described electric power management circuit comprises that mainly 9V alkaline battery, over-current protection circuit and low pressure difference linear voltage regulator (LDO) form power supply voltage converting circuit; Also comprise the shut-off function circuit in the described electric power management circuit, the shut-off function circuit connects a transistor Q7 by the 3.3V end, transistor Q7 base stage connects the I/O port P4.2 of microcontroller, transistor Q7 emitter connects the 3.3V end, transistor Q7 collector electrode connects peripheral circuit VCC end, and the shut-off function circuit provides power path for the peripheral circuit that comprises liquid crystal display circuit, ignition signal collection circuit, light sensing circuit; Described liquid crystal display circuit adopts 128 * 96 graphical dots configuration Liquid Crystal Modules (LCM), is connected with microcontroller by serial communication mode; Described keystroke handling circuit comprises a shutdown button and four personal-machines dialogue button, and the key switch in the circuit adopts the stand-alone keypad mode to be connected with microcontroller I/O port; Described battery voltage detection circuit comprises voltage on-off control circuit and bleeder circuit, the voltage on-off control circuit is comprised of transistor Q9, transistor Q11 and biasing resistor R66, R67, R73, the base stage of transistor Q11 is connected with VCC through resistance R 66, through resistance R 73 ground connection, grounded-emitter connection; The collector electrode of transistor Q11 connects the base stage of transistor Q9 through resistance R 67,, the emitter of transistor Q9 connects with the 9V alkaline cell anode and is connected, collector electrode contact resistance R69, the R74 of the transistor Q9 bleeder circuit that is in series; The AD sample port that connects microcontroller by bleeder circuit; Described light sensing circuit is made of photoresistor, comparator LM2903D and Resistor-Capacitor Unit; Comparator is connected with the I/O port of microcontroller than the output terminal of LM2903D;
Described ignition signal collection circuit is made of inductive head, signal filter circuit, signal amplification and peak holding circuit, peak value trigger circuit, and the signaling line epitaxial part that connects inductive head is shielded by the metal snake leather hose;
Described interface circuit comprises jtag interface.
The 9V alkaline battery adopts 6LR/61 type 9V alkaline battery.
Over-current protection circuit is made of biswitch diode MMBD7000, transistor Q1, Q1 and resistance; The NCP551SN33T1G that low pressure difference linear voltage regulator adopts ON Semiconductor company to release.
Signal filter circuit is connected to form by inductive head input signal interface, bi-directional zener diode DZ23C51, two-way admittance diode MMBD7000 and Resistor-Capacitor Unit in the ignition signal collection circuit;
Signal amplifies and peak holding circuit is connected to form by operational amplifier MCP6294, NPN triode and Resistor-Capacitor Unit;
But the comparison circuit that the peak value trigger circuit are made of LC eliminator, operational amplifier MCP6294, monostable retrigger SN74LV1G123DCT, and Resistor-Capacitor Unit form.
The beneficial effects of the utility model: contactless igniting special intelligent detector is the special portable formula equipment of a Check point fire coil runnability in ignition system.Solved the in the past deficiency of detection facility, it possesses following characteristics:
Non-contact detection high tension spark discharge signal, Security is higher;
Judge that detection efficiency is high rapidly.Need not the dynamic parameters that the detachment point fire coil can test out the spark coil operation, such as spark discharge voltage, sparkover frequency etc.
Calculate engine speed by sparkover frequency and engine strokes number.Compare according to the engine speed that calculates and actual value, can analyze whether fault of signal generator for ignition.
Decision condition is simple and accurately, the user need not to understand spark coil product external structure and input/output interface definition, can use detector that spark coil runnability is detected in real time.Be not only applicable to the specialized maintenance personnel, be applicable to ordinary consumption colony yet.
Adopt snakelike metallic hose to link to each other between inductive head and the equipment body, both can arbitrarily adjust as required the relative position of inductive head and spark coil, can shield the spatial high-frequency radiation signal again, to guarantee the accuracy of data sampling.
The power supply of 9V alkaline battery, ultralow Consumption, standby time is more than at least five years.Running current is not more than 20mA.
Device housings adopts the hand-held design, and volume is little, is easy to carry, and the cost of material is low, and cost performance is high.
Description of drawings
Fig. 1, contactless igniting special intelligent detector structured flowchart;
Fig. 2, electric power management circuit structural representation;
Fig. 3, liquid crystal display circuit port controlling schematic diagram;
Fig. 4, keystroke handling circuit diagram;
Fig. 5, battery voltage detection circuit schematic diagram;
Fig. 6, light sensing circuit diagram;
Fig. 7, ignition signal collection circuit diagram;
Fig. 8, jtag interface circuit diagram;
Fig. 9, power supply conversion and over-current protection circuit figure;
Figure 10, signal filter circuit figure;
Figure 11, signal amplify and peak holding circuit;
Figure 12, peak value trigger circuit;
Figure 13, battery voltage detection circuit.
Embodiment
Understand the utility model for clearer, describe in conjunction with the accompanying drawings and embodiments the utility model in detail:
As shown in figure 1 to figure 13, contactless igniting special intelligent detector mainly is formed by connecting by microcontroller, electric power management circuit, liquid crystal display circuit, keystroke handling circuit, battery voltage detection circuit, light sensing circuit, ignition signal collection circuit, interface circuit; In the present embodiment:
Super low-power consumption, resourceful 16 single-chip microcomputer MSP430F4152 that microcontroller adopts Texas Instruments company to release.Single-chip microcomputer MSP430F4152 adopts Reduced Instruction Set Computer Architecture, and motion speed is fast; Inside carries the 16KB program's memory space, the ram space of 512B, 68 digital I/O mouths, 2 16 bit timing devices, 2 USBs (USCI), respectively one of real-time clock (RTC), 10 bit AD sample modules, 12 bit AD sample module; Can realize in system (ISP) with at application (IAP) programing function; Expansion after this controller is convenient to.
Single-chip microcomputer MSP430F4152 operating voltage range is+1.8V～+ 3.6V; In operating voltage be+2.2V, clock frequency is in the 1Mhz situation, and dynamic current is 220uA, and quiescent current is 0.9uA; Five kinds of battery saving modes are arranged; From sleeping to wakeup time less than 6us;
The external 32.768K crystal of single-chip microcomputer MSP430F4152 is as clock source, by FLL FLL+ and controlled digital oscillator DCO, and for CPU and periphery provide three kinds of different frequency clocks, i.e. auxiliary clock ACK, main system clock MCLK, subsystem clock SMCLK.Power consumption and the operation frequency of system are directly proportional, so these three kinds of frequencies can be matched according to different needs.
High-frequency noise can effectively be removed by bypass and decoupling capacitor by single-chip microcomputer MSP430F4152 digital power DVCC and place, analog power AVCC inlet opening, has strengthened the antijamming capability of single-chip microcomputer.
Electric power management circuit has following three kinds of functions:
1) supply voltage conversion function
Detector adopts the power supply of 6LR/61 type 9V alkaline battery, and (LDO) is converted to 3.3V with the 9V power supply by low pressure difference linear voltage regulator.The NCP551SN33T1G low pressure difference linear voltage regulator that this programme selects ON Semiconductor company to release, this chip quiescent current is little, and output accuracy is high, and maximum current output can reach 150mA, can satisfy the need of work of detector.
2) overcurrent protection function
When the system works electric current exceeds the NCP551SN33T1G maximum operating currenbt, by over-current protection circuit its Enable port is set to low level, do not allow its work, avoid because overcurrent causes power supply chip to burn out.
3) " shutdown " function
Microcontroller cuts out and conducting by the static pipe of I/O port driver, thereby realizes closing and opening peripheral circuit power.Microcontroller is realized " shutdown " function of detector by read switch switch state.Under off-mode, peripheral circuit (liquid crystal display circuit, ignition signal collection circuit, light sensing circuit etc.) supply power is under the closed condition, and microcontroller is in the ultra-low power standby state.
In the electric power management circuit, the linear voltage stabilizer with ultra low differential pressure NCP551SN33T1G that power conversion chip adopts ON Semiconductor company to release, maximum operating voltage can reach 12V, and maximum current output is 150mA, and the Voltage-output precision is high by 2%; Quiescent current is 4uA, satisfies the needs of low power consumption.
D1 is the one-way conduction diode, plays the reverse power connection protective action.
PNP triode Q1 and NPN triode and R9, R14, R13, R9 forms overcurrent protection function.About the electric current that passes through R1 was less than 60mA, namely the pressure drop at R1 two ends was less than 0.6V, and Q1 is in cut-off state, and Q2 also is in cut-off state, and the Enable Pin Enable of low pressure difference linear voltage regulator U2 is in high level state, and U2 allows work and exports the power supply of 3.3V.When the electric current by R1 during greater than 60mA, namely the pressure drop at R1 two ends is greater than 0.6V, and Q1 is on state, and Q2 also is on state, and by collector terminal the Enable Pin of U2 is pulled low to low level state, and U2 quits work, non-transformer output.
The shut-off function circuit is made of PNP triode Q7, and single-chip microcomputer is supplied with by the power supply VCC of port P4.2 opening and closing peripheral circuit.When single-chip microcomputer is received shutdown command by the switching on and shutting down keyed jointing, the P4.2 port is set to high level, PNP triode Q7 is in cut-off state, the collector electrode no-output, peripheral circuit is in off-position (except keystroke handling circuit, the JTAG debug i/f circuit), single-chip microcomputer enters into sleep state simultaneously, thereby has reached the shutdown effect.When the switch switch was pressed, single-chip microcomputer woke up to working state with single-chip microcomputer from sleep state by port wake-up function, and single-chip microcomputer is set to low level with the P4.2 port, and triode Q7 is in the saturation conduction state, and collector electrode output VCC supplies with peripheral circuit.
In the liquid crystal display circuit, microcontroller shows in real time by Liquid Crystal Module after the data analysis that collects is processed, also can realize parameter configuration by Liquid Crystal Module and button.Show 128 * 96 graphical dots configuration Liquid Crystal Modules (LCM), 3.3V power supply system, low power consumption, the LED-backlit mode of adopting; By serial communication mode and microcontroller implementation data transmission.Microcontroller can pass through the opening and closing backlight of I/O port controlling simultaneously.
Single-chip microcomputer links to each other with Liquid Crystal Module by the I/O port, carries out data communication according to the serial communication protocol of Liquid Crystal Module.Single-chip microcomputer is by the opening and closing backlight of P2.5 port controlling Liquid Crystal Module.When port P2.5 was high level, the PNP triode was in cut-off state, the output of collector electrode non-transformer, backlight closing; When port P2.5 was low voltage, the NPN triode was in the saturation conduction state, and collector electrode has power supply output, backlight open.
The keystroke handling circuit: button is divided into a switching on and shutting down button and four personal-machines dialogue button according to function distinguishing.The switching on and shutting down button is realized the switching on and shutting down of detector; The operator realizes human-computer interaction function by human-computer dialogue button and LCD MODULE.The keystroke handling circuit has added anti-shake processing, avoids occurring erroneous judgement.Microcontroller reads key-press status by the I/O mouth.
In order to guarantee under " shutdown " state, can to realize power up function by the switch switch, the switch switch need to be connected to P1 port or P2 port; Single-chip microcomputer only has P1 and P2 port can be configured to the external trigger interrupt function.This circuit need to use the 3.3V Power supply in addition, with the state that guarantees that under " shutdown " state single-chip microcomputer can the responding to switch switch.
Battery voltage detection circuit: by battery voltage detection circuit, microcontroller can be known the powered battery state.Because the embedded AD analog sampling port maximum permissible voltage of microcontroller is no more than 3.3V, so need to carry out voltage division processing to cell voltage; In order to guarantee that this circuit static power consumption is minimum under off-mode, need by the voltage on-off control circuit cell voltage and AD sample port to be disconnected
Be that VCC is when being the 3.3V left and right sides when VCC is in power supply state, NPN triode Q11 is on state, the current collection of Q1 is low voltage very, PNP triode Q9 base stage also is in low level, Q9 is in the saturation conduction state, the collector electrode output level of Q9 approximates the level of emitter, and is namely corresponding with cell voltage.Because the analog sampling port permitted maximum level of single-chip microcomputer is about 3.3V, so need to form bleeder circuit by R69 and R74, reduce sampled level.According to voltage divider principle as can be known, be 9V such as B+, then the actual port sampled level is 3V.
Equipment is under off-mode, and VCC is in power down mode, and Q11 is in cut-off state, and same Q9 also is in cut-off state, and the sample port level is low level.Battery voltage sampling circuit only has Q9 to be in power supply state and is in cut-off state, and basic idle has satisfied the design of low power consumption.
Single-chip microcomputer is analog sampling port A5 by software with the P6.5 port arrangement, by A5 port processing cell voltage.
Light sensing circuit: to the caused change in resistance of the induction of light, be converted into voltage change by photoresistor.By comparator itself and reference voltage are compared, thereby realize the strong and weak corresponding high-low level of light, microcontroller reads level state by I/O, judges current light bull bear position, automatically realizes opening and closing backlight by backlight control circuit.
When light was stronger, the resistance of photoresistor R80 was less, namely R56 divide voltage higher; When light was more weak, the resistance of photoresistor was larger, namely R56 divide voltage lower.
By adjusting adjustable potentiometer P1, adjust its resistance, obtain the low level input end that reference level is input to comparator LM2903D according to voltage divider principle.During the light grow, the voltage on the R56 can uprise, and when being higher than reference level, the output of comparator adds the pull-up resistor of R81 (100K) in the OC open-circuit condition, and P5.4 is in high level state; When light dies down, the voltage meeting step-down on the R56, when being lower than reference level, the output of comparator is in low level state, and P5.4 is in low level state.
Single-chip microcomputer can be judged the light bull bear position by reading P5.4 port high-low level state, again according to the automatically control opening and closing backlight of light bull bear position.
The ignition signal collection circuit is made of inductive head, signal filter circuit, signal amplification and peak holding circuit, peak value trigger circuit, inductive head is obtained induced signal near spark coil, signaling line connects with detector by the metal snake leather hose, can well shield space radiation, guarantee the accuracy of signal sampling; By signal filter circuit, signal amplification circuit, peak holding circuit, peak value trigger circuit etc. signal is transported to again sample port and the I/O port of microcontroller.In order to prevent distorted signals, the embedded reference voltage Vref of microcontroller can be used as the reference voltage of whole sample circuit.
Wherein signal filter circuit is comprised of inductive head input signal interface, bi-directional zener diode DZ23C51, two-way admittance diode MMBD7000 and Resistor-Capacitor Unit;
DZ23C51(D8) be the surface mount bi-directional zener diode, the momentary pulse signal that amplitude can be exceeded 51V is clamped at safety range, plays the effect of the whole Acquisition Circuit of protection, prevents high-voltage breakdown.
MMBD7000(D7) be surface mount two-way admittance diode, by it the signal useful signal be limited between 3.3V and the 0V.
Bandwidth-limited circuit by R27, R31, C15, R58, C33 etc. form can filter out useless low frequency signal and high-frequency signal, only allows complete the passing through of igniting induced signal of certain frequency.
Single-chip microcomputer inside has reference voltage systematic function (1.5V and 2.5V are optional), and can configure output.Because inductive head signal amplitude scope is (0---1.5V), thus reference level selection 1.5V, and port P6.4 is configured to Vref+ outputs to sample circuit.For the accuracy that guarantees to sample, the built-in sampling module of single-chip microcomputer can be selected sample range by software, be that VCC is to Vref-, because fire signal is as bias voltage, so single-chip microcomputer need to be connected Vref-port (P6.3) with the 1.5V reference voltage with the 1.5V level.
Signal amplifies and peak holding circuit is connected to form by operational amplifier MCP6294, NPN triode and Resistor-Capacitor Unit;
The MCP6294 device that operational amplifier U5C adopts microchip company to release, this bandwidth of a device is 10Mzh, operating current is 1.0mA.By operational amplifier signal is carried out amplifying with same ratio, strengthen the driving force of signal.
Operational amplifier U5C and NPN triode form peak holding circuit, the moment blip can be kept a period of time, are convenient to single-chip microcomputer and sample.Retention time length is determined by R65, R64 and C54.
But the comparison circuit that the peak value trigger circuit are made of LC eliminator, operational amplifier MCP6294, monostable retrigger SN74LV1G123DCT, and Resistor-Capacitor Unit form;
Signal after the process amplifier is amplified carries out filtering by lc circuit and is coupled on the reference level, by comparison circuit fire signal is become from low to high level signal, but monostable retrigger SN74LV1G123DCT is determined with the rising edge level by 2 pin, then can export the signal of fixed pulse width (pulse width is determined by R45 and C38), be sent to the P1.7 port of single-chip microcomputer.Single-chip microcomputer reads pulse condition by the P1.7 port, thereby obtains pulse interval and frequency, i.e. spark rate.
JTAG debug i/f circuit, jtag interface are a kind of international standard test protocols, be mainly used in the chip internal test and system is carried out emulation, debugging.JTAG is a kind of embedded type debugging technology, can also realize in-system programming (ISP) function.Can programme to the FLASH device by JTAG.It is 4 line styles (TMS, TCK, TDI, TDO) that this interface adopts the jtag interface of standard
Interface definition is as follows:
TMS .... test pattern is selected;
TCK ... .. test clock;
TDI ... the test data serial input;
TDO .... test data serial output;
GND .... ground
RST ... the test system reset signal;
TEST .... the test system and test signal;
VDD ... .. emulsification power supply output;
VCC ... .. debugging board power supply input;
According to the above description, can realize scheme of the present utility model in conjunction with art technology.
Claims (4)
1. contactless igniting special intelligent detector, it is characterized in that, mainly be formed by connecting by microcontroller, electric power management circuit, liquid crystal display circuit, keystroke handling circuit, battery voltage detection circuit, light sensing circuit, ignition signal collection circuit, interface circuit; Described microcontroller adopts 16 single-chip microcomputer MSP430F4152 of Texas Instruments; Described electric power management circuit comprises that mainly 9V alkaline battery, over-current protection circuit and low pressure difference linear voltage regulator form power supply voltage converting circuit; Also comprise the shut-off function circuit in the described electric power management circuit, the shut-off function circuit connects a transistor Q7 by the 3.3V end, transistor Q7 base stage connects the I/O port P4.2 of microcontroller, transistor Q7 emitter connects the 3.3V end, transistor Q7 collector electrode connects peripheral circuit VCC end, and the shut-off function circuit provides power path for the peripheral circuit that comprises liquid crystal display circuit, ignition signal collection circuit, light sensing circuit; Described liquid crystal display circuit adopts 128 * 96 graphical dots configuration Liquid Crystal Modules, is connected with microcontroller by serial communication mode; Described keystroke handling circuit comprises a shutdown button and four personal-machines dialogue button, and the key switch in the circuit adopts the stand-alone keypad mode to be connected with microcontroller I/O port; Described battery voltage detection circuit comprises voltage on-off control circuit and bleeder circuit, the voltage on-off control circuit is comprised of transistor Q9, transistor Q11 and biasing resistor R66, R67, R73, the base stage of transistor Q11 is connected with VCC through resistance R 66, through resistance R 73 ground connection, grounded-emitter connection; The collector electrode of transistor Q11 connects the base stage of transistor Q9 through resistance R 67,, the emitter of transistor Q9 connects with the 9V alkaline cell anode and is connected, collector electrode contact resistance R69, the R74 of the transistor Q9 bleeder circuit that is in series; The AD sample port that connects microcontroller by bleeder circuit; Described light sensing circuit is made of photoresistor, comparator LM2903D and Resistor-Capacitor Unit; Comparator is connected with the I/O port of microcontroller than the output terminal of LM2903D; Described ignition signal collection circuit is made of inductive head, signal filter circuit, signal amplification and peak holding circuit, peak value trigger circuit, and the signaling line epitaxial part that connects inductive head is shielded by the metal snake leather hose; Described interface circuit comprises jtag interface.
2. a kind of contactless igniting special intelligent detector as claimed in claim 1 is characterized in that, the 9V alkaline battery adopts 6LR/61 type 9V alkaline battery.
3. such as claim 1 or a kind of contactless igniting special intelligent detector claimed in claim 2, it is characterized in that, over-current protection circuit is made of biswitch diode MMBD7000, transistor Q1, Q1 and resistance; The NCP551SN33T1G that low pressure difference linear voltage regulator adopts ON Semiconductor company to release.
4. a kind of contactless igniting special intelligent detector as claimed in claim 1, it is characterized in that, the signal filter circuit in the ignition signal collection circuit is connected to form by inductive head input signal interface, bi-directional zener diode DZ23C51, two-way admittance diode MMBD7000 and Resistor-Capacitor Unit; Signal amplifies and peak holding circuit is connected to form by operational amplifier MCP6294, NPN triode and Resistor-Capacitor Unit; But the comparison circuit that the peak value trigger circuit are made of LC eliminator, operational amplifier MCP6294, monostable retrigger SN74LV1G123DCT, and Resistor-Capacitor Unit form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401221 CN202883212U (en) | 2012-08-14 | 2012-08-14 | Non-contact type intelligent detector special for ignition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401221 CN202883212U (en) | 2012-08-14 | 2012-08-14 | Non-contact type intelligent detector special for ignition |
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| CN202883212U true CN202883212U (en) | 2013-04-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020410A (en) * | 2014-05-19 | 2014-09-03 | 深圳市元征科技股份有限公司 | Ignition switch detection circuit based on automobile OBD diagnosis seat |
| CN105134451A (en) * | 2015-09-25 | 2015-12-09 | 天津斯巴克瑞汽车电子股份有限公司 | Pulse monitoring device for durability of automobile ignition coil and realizing method of pulse monitoring device |
| CN105422360A (en) * | 2015-11-30 | 2016-03-23 | 深圳市轱辘软件开发有限公司 | Detecting circuit for automobile ignition action |
-
2012
- 2012-08-14 CN CN 201220401221 patent/CN202883212U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020410A (en) * | 2014-05-19 | 2014-09-03 | 深圳市元征科技股份有限公司 | Ignition switch detection circuit based on automobile OBD diagnosis seat |
| CN105134451A (en) * | 2015-09-25 | 2015-12-09 | 天津斯巴克瑞汽车电子股份有限公司 | Pulse monitoring device for durability of automobile ignition coil and realizing method of pulse monitoring device |
| CN105134451B (en) * | 2015-09-25 | 2017-05-17 | 天津斯巴克瑞汽车电子股份有限公司 | Realizing method of pulse monitoring device for durability of automobile ignition coil |
| CN105422360A (en) * | 2015-11-30 | 2016-03-23 | 深圳市轱辘软件开发有限公司 | Detecting circuit for automobile ignition action |
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