CN106706324B - A kind of COP ignition signal detector and test macro - Google Patents
A kind of COP ignition signal detector and test macro Download PDFInfo
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- CN106706324B CN106706324B CN201611205339.0A CN201611205339A CN106706324B CN 106706324 B CN106706324 B CN 106706324B CN 201611205339 A CN201611205339 A CN 201611205339A CN 106706324 B CN106706324 B CN 106706324B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
本发明提供一种COP点火信号探测器及测试系统，属于发动机点火信号测试领域。本发明COP点火信号探测器包括探测接头、与探测接头连接的探测信号处理电路、用于输出所述探测信号处理电路处理过的信号输出端，所述探测信号处理电路包括信号输入接口、主控模块、电源模块、前端信号处理模块、信号极性判断模块、极性选择模块、信号调理模块、信号输出接口，所述探测接头探测的信号分别经过信号输入接口、前端信号处理模块、信号极性判断模块、极性选择模块、信号调理模块处理后，从所述信号输出接口输出，所述电源模块用于为所述探测信号处理电路供电。本发明自动识别点火信号的极性并处理，以使点火信号落在合理的范围内，避免信号的失真。
The invention provides a COP ignition signal detector and a testing system, belonging to the field of engine ignition signal testing. The COP ignition signal detector of the present invention includes a detection joint, a detection signal processing circuit connected with the detection joint, and an output terminal for outputting a signal processed by the detection signal processing circuit. The detection signal processing circuit includes a signal input interface, a main control module, power supply module, front-end signal processing module, signal polarity judgment module, polarity selection module, signal conditioning module, and signal output interface, the signals detected by the detection connector respectively pass through the signal input interface, the front-end signal processing module, the signal polarity The judgment module, the polarity selection module and the signal conditioning module output from the signal output interface after processing, and the power supply module is used for supplying power to the detection signal processing circuit. The invention automatically identifies and processes the polarity of the ignition signal, so that the ignition signal falls within a reasonable range and avoids signal distortion.
Description
Technical field
The present invention relates to engine ignition signal testing field more particularly to a kind of COP ignition signal detectors, further relate to
A kind of test macro including the COP ignition signal detector.
Background technique
With the very fast development of auto industry, as the heart of automobile, engine also rapidly develops therewith.Previously, it used
The engine that conventional high-tension line transmitting high-voltage electricity is lighted a fire, since the transmitting loss of its high voltage electric energy is big and does to radio
It disturbs greatly, so being gradually eliminated in automobile market, replacing is that the transmitting of high voltage electric energy can be made to lose and to wireless
The interference of electricity is reduced to the engine of independent igniting (COP) mode of floor level.
Although the constantly development of automobile engine, is constantly updating, (COP) mode of just independently lighting a fire is started
Machine has also updated several times, but the detection technique of car engine ignition signal but can not obtain as engine
To synchronous development and raising, most engine analyzer is still merely able to detect traditional with high pressure currently on the market
The ignition signal of the ignition distributor of line, distributorless ignition engine can not but detect the point of independent igniting (COP) mode engine
Fiery signal.
Partial engine analyzer is that independent igniting (COP) side is detected by method that high-tension ignition extended line is transferred
The ignition signal of formula engine, this detection method are exactly to utilize the traditional ignition distributor with high-voltage line of detection, nothing point in fact
The method of the ignition signal of electric appliance igniter motor come detect it is independent igniting (COP) mode engine ignition signal, about this
Kind detection method, there is following 3 distinct disadvantages:
(1) engine will disintegrate, and operate more troublesome；
(2) due to the engine of independent igniting (COP) mode and traditional ignition distributor with high-voltage line, without ignition distributor point
The ignition system of engine both engines of fire be it is entirely different, being transferred using high-tension ignition extended line may be right
The engine of independent igniting (COP) mode has certain injury, and resulting even in some engines can not normally start at all,
With regard to can not normally be detected at all；
(3) collected ignition wave form in this way is all much distortion status, and detection effect is very unsatisfactory.
Only a small part detecting instrument is not need to transfer by high-tension ignition extended line, but pass through inductive probe
The ignition coil surface of independent igniting (COP) the mode engine of contact obtains ignition signal.These detecting instruments also have disadvantage, i.e.,
Independent igniting (COP) the mode engine that can accurately test is not very much, shielding effect few for some high-voltage electricity energy leakages
Good independent igniting (COP) the mode engine of fruit, which is essentially all that can not detect.
Summary of the invention
To solve the problems of the prior art, the present invention provides a kind of COP ignition signal detector, additionally provides a kind of packet
Include the test macro of the COP ignition signal detector.
COP ignition signal detector of the present invention includes detection joint, connect with detection joint detectable signal processing circuit,
The signal output end crossed for exporting the detectable signal processing circuit processes, the detectable signal processing circuit include that signal is defeated
Incoming interface, main control module, power module, front end signal processing module, signal polarity judgment module, polarity selecting module, signal
Conditioning module, signal output interface, the main control module judge mould with the front end signal processing module, signal polarity respectively
Block, polarity selecting module are connected with signal conditioning module, the signal of detection joint detection pass through respectively signal input interface,
After front end signal processing module, signal polarity judgment module, polarity selecting module, signal conditioning module processing, from the signal
Output interface output, the power module are used to power for the detectable signal processing circuit.
The present invention is further improved, and the detectable signal processing circuit further includes synchronization signal processing module, described same
Step signal processing module is connected with the main control module, front end signal processing module and signal output interface respectively, can complete
The acquisition of one cylinder synchronization signal, and export and give automobile engine comprehensive analysis detection components host, satisfaction have to connect a cylinder same
Walk the testing requirement of the engine comprehensive analysis component of signal aptitude test COP ignition type.For starting for COP ignition type
One cylinder synchronization signal of machine, automobile engine comprehensive analysis detection components host must be by COP ignition signal detector
It provides, and for the engine of traditional distributor ignition type, automobile engine comprehensive analysis detection components host to be used
A cylinder synchronization signal can be provided by COP ignition signal detector, can also original mode obtain.
The present invention is further improved, the COP ignition signal detector generally lip pencil, and the detection joint setting exists
The top opposite with nib is arranged in written end, the signal output end, and structure is simple, easy to operate.
The present invention is further improved, and the detection joint is that the replaceable metal equipped with metal sensing chip incudes spy
Head, the metal sensing chip outside are equipped with insulating layer.
The present invention is further improved, and the detection joint includes ignition signal detection front end and the installation of metal sensing chip
Portion, the ignition signal detection front end and the metal sensing chip mounting portion are in 0-180 degree angle.
Preferably, the ignition signal detection front end and the metal sensing chip mounting portion are in 135 degree of angles.
The present invention is further improved, and the signal output interface is coaxial cable interface, the detection joint, detection letter
Number processing circuit passes through coaxial cable with signal output end respectively and connects.
The present invention is further improved, and the main control module controls chip U14 using 32 bit processors.
The present invention is further improved, and the power module is powered using linear single supply, the voltage of the power module
Range is 9-35V, can be compatible with 12V gasoline car and 24V diesel vehicle.
The present invention also provides a kind of test macro including the COP ignition signal detector, including host, the hosts
Interior to be equipped with comprehensive analysis detection components, the COP ignition signal detector passes through signal output end and the comprehensive analysis component
A/D converter be connected.
Compared with prior art, the beneficial effects of the present invention are: the polarity of automatic identification ignition signal, and by handling
Good ignition signal is sent on corresponding channel, for the acquisition of automobile engine comprehensive analysis detection components host；Automatically to picking up
The ignition signal got zooms in or out, so that ignition signal is fallen in reasonable range, avoids the distortion of signal；Pass through
Metal sensing chip picks up the ignition signal of COP ignition type engine, while compatible traditional distributor ignition picking up signal side
Formula, designed metal sensing chip are adapted to the ignition coil of different size；The acquisition of a cylinder synchronization signal can be completed, and
It exports and gives automobile engine comprehensive analysis detection components host, satisfaction has to connect cylinder synchronization signal aptitude test COP igniting
The testing requirement of the engine comprehensive analysis component of type.
Detailed description of the invention
Fig. 1 is COP ignition signal panel detector structure schematic diagram of the present invention；
Fig. 2 is detectable signal processing circuit structural schematic diagram of the present invention；
Fig. 3 is main control module circuit diagram of the present invention；
Fig. 4 is signal input interface circuit figure；
Fig. 5 is front end signal processing module of the present invention, signal polarity judgment module and synchronization signal processing module circuit diagram；
Fig. 6 is polarity selecting module of the present invention, signal conditioning module, signal output interface circuit figure；
Fig. 7 is test system structure schematic diagram of the present invention.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
As shown in fig. 7, the test macro that this example is used to detect 3 ignition signal of automobile engine includes that COP ignition signal is visited
Device 1, host 2 are surveyed, comprehensive analysis detection components are equipped in the host 2, the COP ignition signal detector 1 is defeated by signal
Outgoing interface is connected with the A/D converter of the comprehensive analysis component.
The present invention can be realized under the premise of not needing to tear 3 ignition coil of automobile engine open to all COP ignition types
The ignition system of automobile engine tested.This example is at best able to test the ignition signal of 6 cylinders simultaneously.This example COP point
The comprehensive analysis detection components host 2 that fiery signal sensor 1 does not have to automobile engine controls, and is an independent module, its handle
The secondary ignition signal and a cylinder synchronization signal handled well give automobile engine comprehensive analysis detection components host 2.
Ignition system test for the engine of COP ignition type, due to need to only test the igniting letter an of cylinder every time
Number, so the interface UI of host 2 only needs to show the firing data and ignition wave form of a cylinder, without showing all cylinders
Firing data and waveform, i.e., without display and train wave and display wave.
As shown in Figure 1, the detection letter that this example COP ignition signal detector 1 includes detection joint 11, connect with detection joint
Number processing circuit 13, for exporting the processed signal output end 14 of the detectable signal processing circuit 13.The COP of this example lights a fire
The generally lip pencil of signal sensor 1, the detection joint 11 setting at written end, the setting of signal output end 14 with nib
Opposite top, the top of this example are coaxial cable mouth, by a cable connection signal output interface J2 and host 2, then
Detectable signal processing circuit 13 is connected by a coaxial cable 15 again and 11 structure of detection joint is simple, it is easy to operate.Certainly,
It can according to need and be set as other shapes.
This example detection joint 11 is the replaceable metal inductive probe equipped with metal sensing chip 12, and metal inductive probe can
Replacement is removed from COP ignition signal detector 1, the metal sensing chip 12 in metal inductive probe there are several different size of rule
Lattice, can be according to the strong and weak replacement different size metal sensing chip 12 of detection signal.Insulation is equipped on the outside of the metal sensing chip 12
Layer, even if encountering the bonding layer of engine when detecting, can also sense signal.
The ignition signal of COP ignition type engine, while compatible traditional ignition distributor point are picked up by metal sensing chip
Fiery picking up signal mode, designed metal sensing chip are adapted to the ignition coil of different size.
Detection joint 11 described in this example includes ignition signal detection front end 111 and metal sensing chip mounting portion 112, the point
Fiery signal detection front end 111 is in 0-180 degree angle with the metal sensing chip mounting portion 112, before the preferably described ignition signal detection
End 111 is in 135 degree of angles with the metal sensing chip mounting portion 112, to extract signal from different orientation.
As shown in Fig. 2-Fig. 6, the detectable signal processing circuit 13 includes signal input interface J1, main control module, power supply
Module J 4, front end signal processing module, signal polarity judgment module, polarity selecting module, signal conditioning module, signal output connect
Mouthful J2, the main control module respectively with the front end signal processing module, signal polarity judgment module, polarity selecting module and letter
Number conditioning module is connected, and the signal that the detection joint 11 detects passes through signal input interface J1, front end signal processing mould respectively
After block, signal polarity judgment module, polarity selecting module, signal conditioning module processing, exported from the signal output interface J2,
The power module J4 is used to power for the detectable signal processing circuit.
The polarity of this example automatic identification ignition signal, and send the ignition signal by handling well on corresponding channel,
For the acquisition of automobile engine comprehensive analysis detection components host；Automatically the ignition signal picked up is zoomed in or out,
So that ignition signal is fallen in reasonable range, the distortion of signal is avoided.
In addition, the detectable signal processing circuit 13 further includes synchronization signal processing module, the synchronization signal handles mould
Block is connected with the main control module, front end signal processing module and signal output interface J2 respectively, can complete the synchronous letter of a cylinder
Number acquisition, and export and give automobile engine comprehensive analysis detection components host, satisfaction has to connect a cylinder synchronization signal ability
Test the testing requirement of the engine comprehensive analysis component of COP ignition type.For the engine of COP ignition type, automobile hair
One cylinder synchronization signal of motivation analysis detection component host must be provided by COP ignition signal detector 1, and right
It is synchronous in a cylinder of the engine of traditional distributor ignition type, automobile engine comprehensive analysis detection components host
Signal can be provided by COP ignition signal detector 1, can also original mode obtain.
As shown in figure 3, the main control chip U14 of this example main control module uses 32 bit processor controls using 32 high speed processors
Coremaking piece U14, the A/D converter with 16 paths, processing speed are fast.
This example power module J4 is powered using linear single supply, and the voltage range of the power module is 9-35V, Neng Goujian
Hold 12V gasoline car and 24V diesel vehicle, linear power supply is well many than Switching Power Supply is powered, in the case of actual measurement ripple less than 20mV,
Meet us to require, eliminates ripple problem；It is powered using single supply, the elements such as IC chip of replacement reduce circuit cost very
More, handling principle is identical, should be noted the integrality for guaranteeing signal.
As shown in figure 4, the signal input interface J1 of this example is connected with detection joint 11, including 6 signal output pins, energy
Enough support the signal acquisition of 6 cylinders.
Since COP ignition signal detector 1 only detects the ignition wave form of a cylinder every time, that is, only one cylinder every time
Ignition signal input, so COP ignition signal detector need only guarantee to have a channel to give the input of COP ignition signal.
This example circuit diagram is illustrated by taking the signal acquisition process of first cylinder of automobile engine 3 as an example:
As shown in figure 5, the ignition signal COPIN1 of this example through the signal input interface J1 output after, into front end signal
Processing module, this example retain the traditional ignition distributor with high-voltage line of original detection, distributorless ignition engine ignition letter
Number processing circuit, guarantee that it is able to detect the igniting of the traditional ignition distributor with high-voltage line, distributorless ignition engine
Signal.
In addition, ignition signal COPIN1 is after amplifier U18A, and first via signal entering signal polarity judgment module, second
After road signal enters the processing of synchronization signal processing module, host 2 is output to from signal output interface J2, at the synchronization signal of this example
It manages module and is used to carry out input signal amplitude size intelligent recognition and range-adjusting, different automobile engines 3 may induction
Very big to signal difference, the signal sensed is very big, need to could export after attenuation units and give signal output interface J2, sense
The signal very little that should be arrived, it need to could be exported by amplifier U18B and give signal output interface J2.
The signal polarity judgment module, main effect is each channel signal polarity of intelligent decision, finally each channel
Signal is exported on both channels by doping region subassembly.
As shown in fig. 6, since the COP ignition signal sensed has positive negative signal, but the signal for being input to host 2 must be
Positive signal, therefore need polarized selecting module that the positive negative signal of the COP igniting sensed is completed to be automatically converted into positive signal.
The signal exported on two channels IN+ and IN- passes through polarity selecting module, and it is defeated to be finally converted into positive signal all the way
Out, it is exported after then being improved by resistance R69 entering signal conditioning module by OUT terminal.
Identical as synchronization signal processing module effect, the effect of signal conditioning module is carried out to input signal amplitude size
Intelligent recognition and range-adjusting, because different automobile engines 3 may sense the signal that signal difference is very big, senses
It is very big, it need to could be exported after overdamping；The signal very little sensed, it need to could be exported after amplification.
Even if different ignition coils, although their ignition energy difference is not very greatly, to be also required to by signal
After conditioning circuit amplification or decaying, it is just exportable that different strong and weak inductive signals are processed into the almost identical signal of amplitude
To the A/D converter (analog-digital converter) in host 2.
The signal conditioning circuit of this example is by the multiple of peak detection unit and MCU control amplification and decaying, sensing
The crest voltage of signal is sent to a 4.5V comparator U12D, if crest voltage is greater than 4.5V, it just generates a low level
Pulse is sent to control chip U13, as soon as control chip U13 often receives a pulse, adjusts primary decaying, number of stages of amplification, until
There is no low level pulse generation.Wherein, when signal conditioning module powers on, circuit defaults are not decay and are to be amplified to maximum
State.
The present invention can be realized the hair to all COP ignition types under the premise of not needing to tear engine igniting coil open
The ignition system of motivation is tested.And the ignition system of the engine of COP ignition type is tested, the interface UI of host 2
Retain original display styles, without change.It can be realized automobile engine comprehensive analysis detection components host to have to connect one
The engine comprehensive analysis component of cylinder synchronization signal aptitude test COP ignition type, this COP ignition signal detector can provide
One cylinder synchronization signal gives this kind of engine comprehensive analysis component, to realize this kind of engine comprehensive analysis module testing COP point
The engine of fiery type；The engine of currently on the market 95% or more COP ignition type can be tested.
The specific embodiment of the above is better embodiment of the invention, is not limited with this of the invention specific
Practical range, the scope of the present invention includes being not limited to present embodiment, all equal according to equivalence changes made by the present invention
Within the scope of the present invention.
Claims (9)
1. a kind of COP ignition signal detector, it is characterised in that: including detection joint, the detectable signal being connect with detection joint
Processing circuit, the signal output end crossed for exporting the detectable signal processing circuit processes, the detectable signal processing circuit
Including signal input interface, main control module, power module, front end signal processing module, signal polarity judgment module, polarity selection
Module, signal conditioning module, signal output interface, the main control module respectively with the front end signal processing module, pickup electrode
Property judgment module, polarity selecting module be connected with signal conditioning module, the signal of the detection joint detection passes through signal respectively
After input interface, front end signal processing module, signal polarity judgment module, polarity selecting module, signal conditioning module processing, from
The signal output interface output, the power module are used to power for the detectable signal processing circuit, the detection joint
For the replaceable metal inductive probe equipped with metal sensing chip, the metal sensing chip outside is equipped with insulating layer.
2. COP ignition signal detector according to claim 1, it is characterised in that: the detectable signal processing circuit is also
Including synchronization signal processing module, the synchronization signal processing module respectively with the main control module, front end signal processing module
It is connected with signal output interface.
3. COP ignition signal detector according to claim 1 or 2, it is characterised in that: the COP ignition signal detection
Device generally lip pencil, the detection joint are arranged at written end, and the top opposite with nib is arranged in the signal output end.
4. COP ignition signal detector according to claim 3, it is characterised in that: the detection joint includes igniting letter
Number detection front end and metal sensing chip mounting portion, the ignition signal detection front end and the metal sensing chip mounting portion are in 0-
180 degree angle.
5. COP ignition signal detector according to claim 4, it is characterised in that: ignition signal detection front end with
The metal sensing chip mounting portion is in 135 degree of angles.
6. COP ignition signal detector according to claim 1 or 2, it is characterised in that: the signal output interface is same
Shaft cable interface, the detection joint, detectable signal processing circuit pass through coaxial cable with signal output end respectively and connect.
7. COP ignition signal detector according to claim 1 or 2, it is characterised in that: the main control module uses 32
Processor controls chip U14.
8. COP ignition signal detector according to claim 7, it is characterised in that: the power module is using linear single
Power supply power supply, the voltage range of the power module are 9-35V.
9. a kind of test macro including any one of the claim 1-8 COP ignition signal detector, it is characterised in that: packet
Host is included, comprehensive analysis detection components are equipped in the host, the COP ignition signal detector passes through signal output end and institute
The A/D converter for stating comprehensive analysis component is connected.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110763889A (en) * | 2019-11-26 | 2020-02-07 | 漳州市东方智能仪表有限公司 | Portable automobile intelligent oscillometer |
| CN111811824B (en) * | 2020-06-18 | 2022-07-26 | 上海空间推进研究所 | Attitude control engine polarity testing tool and using method thereof |
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| "COP点火系统快速探测器在诊断中的应用";姜书权;《汽车电器》;20071231;第56页 |
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