CN207396676U - A kind of smoke machine board failure positioner - Google Patents
A kind of smoke machine board failure positioner Download PDFInfo
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- CN207396676U CN207396676U CN201721233056.7U CN201721233056U CN207396676U CN 207396676 U CN207396676 U CN 207396676U CN 201721233056 U CN201721233056 U CN 201721233056U CN 207396676 U CN207396676 U CN 207396676U
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Abstract
The utility model discloses a kind of smoke machine board failure positioners,Including central processing unit,D/A converter module,Current amplifier module,Probe,Permanent ground terminal,Signal acquisition module,Analog-to-digital conversion module and display,The input terminal of the output terminal connection D/A converter module of central processing unit,The input terminal of the output terminal connection Current amplifier module of D/A converter module,The output terminal of Current amplifier module and the input terminal difference linking probe of signal acquisition module,And probe,Access is formed between component to be measured and permanent ground terminal,The input terminal of the output terminal connection analog-to-digital conversion module of signal acquisition module,The input terminal of the output terminal connection central processing unit of analog-to-digital conversion module,The output terminal connection display of central processing unit,Show the test voltage current characteristics figure of each end of component,Test voltage current characteristics figure and reference voltage current characteristics figure are compared,Whether the component of failure judgement circuit board is normal,Complete the fault location to smoke machine circuit board.
Description
Technical field
The present invention relates to tobacco equipment technical field more particularly to a kind of smoke machine board failure positioners.
Background technology
At present, in cigarette production line, smoke machine equipment includes the key equipment of a large amount of cigarette automated productions, such as frequency conversion
Device, Moisture Meter, flowmeter etc., and with the propulsion that tobacco leaf production automates, smoke machine equipment has used large scale integrated circuit plate
As mainstream.In operational process electronic failure can occur for these equipment, need to test smoke machine circuit board at this time, so as to find
Failure component, and solve electronic failure.Existing smoke machine circuit board testing means are mainly by universal meter or oscillograph pair
Electronic component in circuit board measures, so as to find the failure in smoke machine circuit board.The measurement result of universal meter is only capable of
A quiescent value of component information to be measured is characterized, such as voltage value, current value or resistance value, and universal meter is only capable of detection resistance
Whether normal, other components can not detect；Oscillograph is commonly used to measure the transient voltage waveform or instantaneous of one section of circuit
Current waveform, oscillograph measure a part of circuit of circuit board, then according to the transient waveform or quiescent value of voltage and current
Failure caused by this partial circuit is inferred to, it is necessary to which technical professional coordinates corresponding circuit diagram that could complete due to knowing
Know property right protection, device service business does not often provide the circuit diagram of smoke machine equipment, this is resulted in can not be by universal meter or oscillography
The testing result of device, the failure for drawing smoke machine circuit board of efficiently and accurately, also just can not to smoke machine circuit board carry out maintenance and
It safeguards.And oscillograph need to measure under smoke machine circuit board working condition, be that can not use oscillograph in actual production
Fault test is carried out to the smoke machine in work.
The content of the invention
The object of the present invention is to provide a kind of devices for on-line testing smoke machine circuit board, can be in the situation of no drawings
Under, the positioning of failure component and judgement are carried out to the faulty circuit plate in smoke machine, achieve the purpose that fault detect.
The technical solution adopted by the present invention is：
A kind of smoke machine board failure positioner, including central processing unit, D/A converter module, Current amplifier module,
Probe for being connected with component end, the permanent ground terminal for being grounded with component end or smoke machine circuit board ground end, letter
Number acquisition module, analog-to-digital conversion module and display, the input terminal of the output terminal connection D/A converter module of central processing unit, number
The input terminal of the output terminal connection Current amplifier module of mould modular converter, the output terminal and signal acquisition module of Current amplifier module
Input terminal difference linking probe, and form access, the output of signal acquisition module between probe, component to be measured and permanent ground terminal
The input terminal of end connection analog-to-digital conversion module, the input terminal of the output terminal connection central processing unit of analog-to-digital conversion module, centre
Manage the output terminal connection display of device.
The number of probe in the smoke machine board failure positioner is multiple and described smoke machine circuit board event
Barrier positioner further includes time division multiplexing module and interface panel, is provided with multiple relays in the interface panel, and after
Electric appliance is corresponded with probe；The input terminal of time division multiplexing module is connected with the output terminal of central processing unit, and be time-multiplexed mould
The output terminal of block connects the input terminal of each relay respectively, and the input terminal of each relay is also connected with Current amplifier module
Output terminal, the output terminal of each relay connect the input terminal of corresponding probe respectively, and all probes are all connected with signal acquisition mould
The input terminal of block.
Controlled ground terminal, the false impulse module for controlling controllably terminal voltage are further included in the interface panel, it is auxiliary
The input terminal of pulse module is helped to connect the output terminal of central processing unit, the output terminal of false impulse module connects controlled ground terminal.
It is defeated that the circuit of the false impulse module includes chip 4052, false impulse input peripheral circuit and false impulse
Go out peripheral circuit；
False impulse input peripheral circuit includes first resistor, and first resistor input terminal connects the output of central processing unit
End, first resistor output terminal connect 12 feet of chip 4052；
False impulse input peripheral circuit further includes second resistance, the first TL084 of operation amplifier chip, the first capacitance, the
Three resistance and the 4th resistance, second resistance input terminal connect the output terminal of central processing unit, the output terminal connection the of second resistance
6 feet of one TL084, the 5 feet ground connection of the first TL084, connect 3rd resistor, 3rd resistor between 6 feet and 7 feet of the first TL084
The first capacitance of both ends parallel connection, the output terminal of the first TL084 connect the 4th resistance, and the 4th resistance output terminal connects the 5 of chip 4052
Foot；The 9 feet connection external signal of chip 4052, so as to control the presence or absence of pulse signal that false impulse module exported, chip
4052 10 feet connection external signal, so as to control the positive and negative of pulse signal that false impulse module exported；The 2 of chip 4052
Foot, 4 feet, 6 feet, 11 ends ground connection；
False impulse output peripheral circuit includes operational amplifier L165, cathode voltage circuit, cathode voltage circuit, the 5th
Resistance, the 6th resistance, the 7th resistance and the 8th resistance；
Cathode voltage circuit includes the first Zener diode, the second capacitance, the anode connection -15V of the first Zener diode
Voltage source, 11 feet of the cathode connection L165 of the first Zener diode, the plus earth of the second capacitance, the cathode of the second capacitance connect
Connect 11 feet of L165；
Cathode voltage circuit includes the second Zener diode, the 3rd capacitance, the second Zener diode cathode connection+15V electricity
Potential source, 4 feet of the anode connection L165 of the second Zener diode, the cathode ground connection of the 3rd capacitance, the anode connection of the 3rd capacitance
4 feet of L165；
2 feet of the 3 feet connection L165 of chip 4052, the 3 feet ground connection of L165,13 feet of chip 4052 connect the 7th respectively
The input terminal of the input terminal of resistance and the 8th resistance, 1 foot of the output terminal connection L165 of the 7th resistance, the output terminal of the 8th resistance
Ground connection；1 foot of L165 connects the input terminal of the 6th resistance, and the input terminal of the 6th resistance passes through the 5th resistance eutral grounding, the 6th electricity
Controlled ground terminal in the output terminal connecting interface panel of resistance.The D/A converter module is by chip DAC0800 and its periphery electricity
Road is formed.
The analog-to-digital conversion module is made of chip AD7475 and its peripheral circuit.
The Current amplifier module includes operation amplifier chip LM759 and its peripheral circuit, the peripheral circuit bag
Include the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance, the 15th resistance,
16 resistance, the 17th resistance, the 18th resistance, the 19th resistance and the 20th resistance, the 4th capacitance and the 5th capacitance, first
Zener diode and the second zener diode；
4 feet of LM759 by the 9th resistance connection+15V voltage sources, 11 feet of LM759 are connected by the 14th resistance-
15V voltage sources；
2 feet of LM759 connect the output terminal of D/A converting circuit, the 12nd resistance both ends parallel connection the by the 12nd resistance
Four capacitances, the 12nd resistance output terminal connect the 13rd resistance, and the 13rd resistance output terminal is divided into two-way, is grounded all the way, another
Road connects 3 feet of LM759；The input terminal of 13rd resistance also connects external bias, the output of the tenth resistance by the tenth resistance
The input terminal of the 11st resistance of end connection, 1 foot of the input terminal connection LM759 of the 11st resistance, the 1 foot connection the tenth of LM759
The input terminal of five resistance, the output head grounding of the 15th resistance；16th resistance is connected with the 5th capacitance, and the 16th resistance with
The series circuit that 5th capacitance is formed is parallel to the 15th resistance both ends；The anode of first zener diode connects the 15th resistance
Input terminal, the cathode of the first zener diode connects the cathode of the second zener diode, and the anode of the second zener diode connects
Ground；19th resistance is connected with the 20th resistance, and the anode of the 19th resistance input terminal the first zener diode of connection, and second
Ten resistance output head groundings；17th resistance, the input terminal of the 18th resistance are all connected with 19 resistance input terminals, the 17th resistance
Output terminal exports sine wave signal, the 18th resistance output terminal output sine wave signal, the 19th resistance output terminal output sine
Ripple signal, the 17th resistance output terminal, the 18th resistance output terminal and the 19th resistance output terminal are connected respectively by relay
Different probes.
The signal acquisition circuit include chip PGA203 and its peripheral circuit, the 2nd TL084 of operation amplifier chip and
The 3rd TL084 of operation amplifier chip, the peripheral circuit includes, slide rheostat, the 21st resistance, the 22nd electricity
Resistance, the 23rd resistance, the 24th resistance, the 25th resistance, the 26th resistance, the 27th resistance；
The slide plate input terminal connection+15v power supplys of slide rheostat, the 6 of one end connection chip PGA203 of slide rheostat
Foot, 9 feet of other end connection chip PGA203；7 feet of chip PGA203 are grounded by the 21st resistance R21；Chip
The 8 foot linking probes of PGA203；1 foot of chip PGA203 and 2 feet connection external control signal, realize the electric current to being gathered
The gain control of signal, 5 feet the 7th capacitance of connection of chip PGA203, the 7th capacitance output head grounding, the 4 of chip PGA203
Foot is grounded；10 feet of chip PGA203 connect the 6th capacitance, and the 6th capacitance output terminal connects chip with 11 feet of chip PGA203
12 feet of PGA203,12 feet of chip PGA203 connect the input terminal of the 22nd resistance；
It sets with the operation amplifier chip TL084 that the output terminal of the 22nd resistance is connected as the 2nd TL084, the 22nd
The output terminal of resistance connects 9 feet of the 2nd TL084, the 10 feet ground connection of the 2nd TL084, the 9 feet connection the 23rd of the 2nd TL084
The input terminal of resistance, 8 feet of the 2nd TL084 connect the output terminal of the 23rd resistance, the output terminal connection of the 23rd resistance
The input terminal of 24th resistance R24；
It sets with the operation amplifier chip TL084 that the output terminal of the 24th resistance is connected as the 3rd TL084, the 24th
The output terminal of resistance connects 6 feet of the 3rd TL084, the 25th resistance of connecting between 6 feet and outside reference of the 3rd TL084；
6 feet of 3rd TL084 connect the input terminal of the 26th resistance, and the output terminal of the 26th resistance connects the 7 of the 3rd TL084
Foot, 7 feet of the 3rd TL084 connect the input terminal of the 27th resistance R27, the output terminal connection modulus of the 27th resistance R27
The input terminal of modular converter；The 5 feet ground connection of 3rd TL084.
The present invention is by between the arbitrary component end of faulty circuit plate and permanent ground terminal or arbitrary component and permanent ground
Apply sine voltage signal between end respectively, gather the current signal under the corresponding sine voltage signal in each end of component, obtain
To test voltage-current characteristics figure of each end of component, in the same way, obtain it is identical with faulty circuit plate just
Reference voltage-current characteristics figure of the end of component is corresponded in normal circuit board, by test voltage-current characteristics figure and benchmark electricity
Whether piezo-electric properties of flow figure is compared, normal so as to the component of failure judgement circuit board, completes the event to smoke machine circuit board
Barrier positioning.
Further, by set multiple probes and with the one-to-one relay of probe, and pass through central processing unit
With the break-make of time division multiplexing module control relay so that sine voltage signal timesharing is applied to the end of multiple components, according to
It is secondary to obtain test voltage corresponding with the end of multiple components-current characteristics figure, so as to quick failure judgement circuit board
Whether multiple components are normal, greatly improve detection efficiency.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the circuit diagram of false impulse module of the present invention；
Fig. 3 is the circuit diagram of D/A converter module of the present invention；
Fig. 4 is the circuit diagram of Current amplifier module of the present invention；
Fig. 5 is the circuit diagram of signal acquisition module of the present invention.
Specific embodiment
As shown in Figure 1, the present invention includes central processing unit, D/A converter module, Current amplifier module, is used for and component
The probe of end connection, permanent ground terminal, signal acquisition module, mould for being grounded with component end or smoke machine circuit board ground end
Number modular converter and display, the input terminal of the output terminal connection D/A converter module of central processing unit, D/A converter module
Output terminal connects the input terminal of Current amplifier module, the output terminal of Current amplifier module and the input terminal difference of signal acquisition module
Linking probe, and access is formed between probe, component to be measured and permanent ground terminal, the output terminal connection modulus of signal acquisition module turns
Change the mold the input terminal of block, the input terminal of the output terminal connection central processing unit of analog-to-digital conversion module, the output terminal of central processing unit
Connect display.
By computing in central processing unit, logical signal is generated, D/A converter module is converted to logical signal continuously
Sine voltage signal, and pass through amplitude and waveform that Current amplifier module adjusts sine voltage signal.
The test process of the present invention is as follows：
The end of the component to be measured of probe access faulty circuit plate, such as any one pin of chip, resistance or electricity
The either end of appearance, faulty circuit plate perseverance ground terminal ground connection are applied with one between the end of component to be measured and permanent ground terminal
Sinusoidal signal, probe and permanent ground terminal form access by the circuit on smoke machine circuit board.It is right in signal acquisition circuit acquisition probe
The current signal under sine voltage signal is answered, in order to precisely test, the voltage signal on signal acquisition circuit while acquisition probe
And current signal, wherein, voltage signal is known.
The signal of signal acquisition module acquisition is analog signal, by the processing of analog to digital conversion circuit and central processing unit
Afterwards, a voltage-current characteristic curve in access between an end of component and permanent ground terminal can be obtained, sets the curve
For test voltage-current characteristic curve, and test voltage-current characteristic curve is shown over the display.
Probe is accessed to another end of the component to be measured of faulty circuit plate, such as another pin of chip, resistance
Or the other end of capacitance, obtain another test voltage-electricity in access between another end of component and permanent ground terminal
Properties of flow curve, and the curve is shown over the display.All corresponding surveys of all ends of component to be measured are obtained successively
Try voltage-current characteristic curve.
Repeat the above process, successively by probe access in the normal circuit plate identical with faulty circuit plate with component to be measured
All ends of identical component obtain and all one-to-one voltage-current characteristics of test voltage-current characteristic curve
Curve sets voltage-current characteristic curve on the basis of the curve.
In the case where component to be measured breaks down, test voltage-current characteristic curve of the component end to be measured
It is compared with reference voltage-current characteristic curve under normal condition, it may occur that significant change.By each end of component to be measured
Test voltage-current characteristic curve and corresponding reference voltage-current characteristic curve compare one by one, if identical,
Illustrate that component to be measured is normal, conversely, then illustrating that the component to be measured of faulty circuit plate is abnormal, to the failure of smoke machine circuit board
Positioning is completed.
Or an end by the both ends component to be measured of probe access faulty circuit plate, permanent ground terminal access two end member to be measured
Another end of device applies sine voltage signal at component both ends in both ends to be measured.Such situation is without again by probe
Access another end of the both ends component to be measured of faulty circuit plate, you can judge whether both ends component to be measured is normal.
The present invention applies sine voltage signal by each end of the component to be measured in faulty circuit plate, gathers simultaneously
The current signal of each end, obtains test voltage-current characteristics figure of the test point, while obtains identical with faulty circuit plate
Normal circuit plate in correspond to reference voltage-current characteristics figure of each end of component, by by test voltage-current characteristics
Curve and corresponding reference voltage-current characteristic curve compare one by one, judge whether component to be measured is normal, completes to smoke machine
The fault location of circuit board.
During test, the electric current that each end of component to be measured applies is weak current, no more than 200mA, is met
The standard that U.K. Ministry of Defence formulates, will not damage device, ensure that the safety of element during the test.
As shown in Figure 1, the number of the probe further includes for multiple and described smoke machine board failure positioners
Be time-multiplexed module and interface panel, multiple relays is provided in the interface panel, and relay and probe one are a pair of
It should；In the present embodiment, for quick wiring, permanent ground terminal is arranged on interface panel.The input terminal for the module that is time-multiplexed is in
The output terminal of central processor is connected, and the output terminal for the module that is time-multiplexed connects the input terminal of each relay respectively, and each
The input terminal of relay is also connected with the output terminal of Current amplifier module, and the output terminal of each relay connects corresponding probe respectively
Input terminal, all probes are all connected with the input terminal of signal acquisition module.
Due to being usually provided with multiple components in smoke machine circuit board, component includes multiple chips, diode, three poles
Pipe, resistance, capacitance etc., particularly chip pin is large number of, and arrangement is intensive, and measurement is not easy therefore, to set multiple probes, more
A probe is connected to the end of one or more components of faulty circuit plate, and passes through central processing unit to the module that is time-multiplexed
Control, realize the Time-sharing control to multiple relay opening and closing, realize that sine voltage signal timesharing is applied to multiple spies
On pin, and one-to-one test voltage-current characteristics figure of the component end contacted with multiple probes is obtained successively, and institute
It is many so as to the multiple components or pin of quick failure judgement circuit board on the test voltage stated-current characteristics figure display
Whether more chips is normal, greatly improves detection efficiency.
Meanwhile because the circuit between component end and circuit board perseverance ground terminal may differ, for single element such as
For capacitance, resistance, whether normal, comparatively laborious if need to detect both ends access point respectively to the detection of capacitance or resistance.It at this point, can
By resistance or capacitance one end linking probe, connection permanent ground terminal in one end improves detection efficiency.
As shown in Figure 1, controlled ground terminal, the auxiliary arteries and veins for controlling controllably terminal voltage are further included in the interface panel
Die block, false impulse module input terminal connection central processing unit output terminal, false impulse module output terminal connection by
Control ground terminal.
Element present in smoke machine circuit board is varied, has some three-terminal elements such as triode in measurement, it is necessary to connect
Enter controlled ground terminal, three ends of triode connect controlled ground terminal, permanent ground terminal and probe respectively, and specific connection relation is existing
Technology, this will not be detailed here.
Controlled ground terminal, permanent ground terminal and probe cooperate, and complete the fault measuring of some particular components, further perfect
Smoke machine board failure positioner is test scope.
The accompanying drawings in the following description is some embodiments of the present invention, is embodied in order to illustrate more clearly of the present invention
Mode or technical solution of the prior art, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
As shown in Fig. 2, the electric router chip 4052 of the false impulse module, false impulse input peripheral circuit and auxiliary
Pulse output peripheral circuit is helped to form；
False impulse input peripheral circuit includes first resistor R1, and first resistor R1 input terminals connect the defeated of central processing unit
Outlet, first resistor R1 output terminals connect 12 feet of chip 4052；
False impulse input peripheral circuit further includes second resistance R2, the first TL084 of operation amplifier chip, the first capacitance
C1,3rd resistor R3 and the 4th resistance R4, second resistance R2 input terminals connect the output terminal of central processing unit, second resistance R2's
Output terminal connects 6 feet of the first TL084, and the 5 feet ground connection of the first TL084 connects the 3rd between 6 feet and 7 feet of the first TL084
The output terminal of the first capacitance C1, the first TL084 of resistance R3,3rd resistor R3 both ends parallel connection connects the 4th resistance R4, the 4th resistance
R4 output terminals connect 5 feet of chip 4052；
The 9 feet connection external signal of chip 4052, so as to control the presence or absence of pulse signal that false impulse module exported,
The 10 feet connection external signal of chip 4052, so as to control the positive and negative of pulse signal that false impulse module exported；
2 feet of chip 4052,4 feet, 6 feet, 11 ends ground connection；
False impulse output peripheral circuit includes operational amplifier L165, cathode voltage circuit, cathode voltage circuit, the 5th
Resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8；
Cathode voltage circuit includes the first Zener diode SV1, the second capacitance C2, the anode of the first Zener diode SV1
Connection -15V voltage sources, 11 feet of the cathode connection L165 of the first Zener diode SV1, the plus earth of the second capacitance C2, the
11 feet of the cathode connection L165 of two capacitance C2；
Cathode voltage circuit includes the second Zener diode SV2, the 3rd capacitance C3, and the second Zener diode SV2 cathode connect
Connect+15V voltage sources, 4 feet of the anode connection L165 of SV2 on the second Zener diode, the cathode ground connection of the 3rd capacitance C3, the 3rd
4 feet of the anode connection L165 of capacitance C3；
2 feet of the 3 feet connection L165 of chip 4052, the 3 feet ground connection of L165,13 feet of chip 4052 connect the 7th respectively
The input terminal of the input terminal of resistance R7 and the 8th resistance R8,1 foot of the output terminal connection L165 of the 7th resistance R7, the 8th resistance R8
Output head grounding；1 foot of L165 connects the input terminal of the 6th resistance, and the input terminal of the 6th resistance R6 passes through the 5th resistance R5
It is grounded, the controlled ground terminal in the output terminal connecting interface panel of the 6th resistance R6.
The D/A converter module is made of chip DAC0800 and its peripheral circuit, and chip DAC0800 peripheral circuits connect
It connects simply, it is easy to control and cheap.
In the present embodiment, as shown in figure 3, peripheral circuit chip the 4th TL084 and the 5th TL084 of chip, are also wrapped
Include the 29th resistance R29, the 30th resistance R30, the 31st resistance R31, the 32nd resistance R32, the 33rd resistance
R33, the 34th resistance R34, the 35th resistance R35 and the 36th resistance R36, the 8th capacitance C8 and the 9th capacitance C9.
5 feet of DAC0800,6 feet, 7 feet, 8 feet, 9 feet, 10 feet, 11 feet, 12 feet the output terminal phase with central processing unit respectively
Connection, 16 feet of DAC0800 are grounded by the 8th capacitance C8, and 15 feet of DAC0800 are grounded by the 29th resistance R29,
1 foot of DAC0800 is directly grounded, 14 feet of DAC0800 by the reference voltage outside the 31st resistance R31 connections, and
14 feet of DAC0800 are by the 32nd resistance R32 connection reference voltages, to adjust the positive line voltage of D/A converting circuit output
The amplitude of signal.
2 feet of DAC0800 are grounded by the 30th resistance R30, set the operation amplifier core being connected with 2 feet of DAC0800
Piece TL084 is the 4th TL084, and 2 feet of DAC0800 connect 3 feet of the 4th TL084, and 4 feet of DAC0800 connect the 4th TL084
2 feet, 1 foot that 2 feet of the 4th TL084 pass through the 4th TL084 of the 33rd resistance R33 connections.The 11 feet connection of 4th TL084
Power cathode, 4 feet connection power cathode.
1 foot of 4th TL084 connects the input terminal of the 34th resistance R34, the output terminal connection of the 34th resistance R34
The input terminal of 35th resistance R35, the output head grounding of the 35th resistance R35；35th resistance R35 both ends parallel connections
Nine capacitance C9；It sets with the operation amplifier chip TL084 that the output terminal of the 35th resistance R35 is connected as the 5th TL084, the
The output terminal of 35 resistance R35 connects 5 feet of the 5th TL084, and 6 feet of the 5th TL084 connect the defeated of the 36th resistance R36
Enter end, the output terminal of the 36th resistance R36 connects 7 feet of the 5th TL084, the 7 feet connection Current amplifier module of the 5th TL084
Input terminal, i.e. the 12nd resistance R12 input terminal.
As shown in figure 4, the Current amplifier module includes operation amplifier chip LM759 and its peripheral circuit, it is described
Peripheral circuit include the second+15V voltage sources and -15V voltage sources, the 9th resistance R9, the tenth resistance R10, the 11st resistance R11,
12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th
Resistance R17, the 18th resistance R18, the 19th resistance R19 and the 20th resistance R20, the 4th capacitance C4 and the 5th capacitance C5,
One zener diode D1 and the second zener diode D2；
Second+15V voltage sources pass through the 14th resistance by 4 feet of the 9th resistance R9 connections LM759, -15V voltage sources
11 feet of R14 connections LM759；
2 feet of LM759 pass through the output terminal of the 12nd resistance R12 connection D/A converting circuits, the 12nd resistance R12 both ends
The 4th capacitance C4 of parallel connection, the 12nd resistance R12 output terminals connect the 13rd resistance R13, and the 13rd resistance R13 output terminals are divided into two
Road is grounded all the way, and another way connects 3 feet of LM759；The input terminal of 13rd resistance R13 is also outer by the tenth resistance R10 connections
Portion biases, and the output terminal of the tenth resistance R10 connects the input terminal of the 11st resistance R11, the input terminal connection of the 11st resistance R11
1 foot of LM759,1 foot of LM759 connect the input terminal of the 15th resistance R15, the output head grounding of the 15th resistance R15；Tenth
Six resistance R16 connect with the 5th capacitance C5, form filter circuit, and the filter circuit is parallel to the 15th resistance R15 both ends；
The anode of first zener diode D1 connects the input terminal of the 15th resistance R15, and the first zener diode D1's is negative
Pole connects the cathode of the second zener diode D2, the plus earth of the second zener diode D2；First zener diode D1 and
Two zener diode D2 form overvoltage crowbar.
19th resistance R19 connects with the 20th resistance R20, and the 19th resistance R19 input terminals connect the first voltage stabilizing two
The anode of pole pipe D1, the 20th resistance R20 output head groundings；17th resistance R17, the input terminal of the 18th resistance R18 connect
Connect 19 resistance input terminals, the 17th resistance R17 output terminals output current value is the sine wave signal of 10mA, the 18th resistance
R18 output terminals output current value is the sine wave signal of 200mA, and the 19th resistance R19 output terminals output current value is 0.5mA's
Sine wave signal, the 17th resistance R17 output terminals, the 18th resistance R18 output terminals and the 19th resistance R19 output terminals lead to respectively
It crosses relay and connects different probes.
Operation amplifier chip LM759 and its peripheral circuit described in the present embodiment can amplify D/A converter module output just
String voltage signal, and multiple output terminals are set, meet the demand of the component of different characteristics on faulty circuit plate.
As shown in figure 5, the signal acquisition circuit includes chip PGA203 and its peripheral circuit, operation amplifier chip the
Two TL084 and operation amplifier chip the 3rd TL084, the peripheral circuit slide rheostat R28, the 21st resistance R21,
22 resistance R22, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, the 26th resistance
R26, the 27th resistance R27；
The slide plate input terminal connection+15v power supplys of slide rheostat R28, one end connection chip of slide rheostat R28
6 feet of PGA203,9 feet of other end connection chip PGA203；7 feet of chip PGA203 are grounded by the 21st resistance R21；
The 8 foot linking probes of chip PGA203；1 foot of chip PGA203 and 2 feet connection external control signal, are realized to being gathered
The gain control of current signal, 5 feet of chip PGA203 connect the 7th capacitance C7, the 7th capacitance C7 output head groundings, chip
The 4 feet ground connection of PGA203；10 feet of chip PGA203 connect the 6th capacitance C6, the 6th capacitance C6 output terminals and chip PGA203
11 feet connection chip PGA203 12 feet, 12 feet of chip PGA203 connect the input terminal of the 22nd resistance R22；
It sets with the operation amplifier chip TL084 that the output terminal of the 22nd resistance R22 is connected as the 2nd TL084, second
The output terminal of 12 resistance R22 connects 9 feet of the 2nd TL084, the 10 feet ground connection of the 2nd TL084, the 9 feet connection of the 2nd TL084
The input terminal of 23rd resistance R23,8 feet of the 2nd TL084 connect the output terminal of the 23rd resistance R23, the 23rd electricity
The output terminal for hindering R23 connects the input terminal of the 24th resistance R24；
It sets with the operation amplifier chip TL084 that the output terminal of the 24th resistance R24 is connected as the 3rd TL084, second
The output terminal of 14 resistance R24 connects 6 feet of the 3rd TL084, connects the 20th between 6 feet and outside reference of the 3rd TL084
Five resistance R25；6 feet of 3rd TL084 connect the input terminal of the 26th resistance R26, and the output terminal of the 26th resistance R26 connects
7 feet of the 3rd TL084 are connect, 7 feet of the 3rd TL084 connect the input terminal of the 27th resistance R27, the 27th resistance R27's
Output terminal connects the input terminal of analog-to-digital conversion module；The 5 feet ground connection of 3rd TL084.
Chip PGA203 and its peripheral circuit component are few, and circuit structure is simple etc., can will be gathered by two TL084
Voltage transformation to 0V ~ 1V signal, convenient for D/A converting circuit use.
In the present embodiment, analog-to-digital conversion module is made of chip AD7475 and its peripheral circuit.The time division multiplexing
Module is made of chip 74LS77, chip CD4051 and peripheral circuit.Central processing unit is by host test, microcontroller and CPLD
It forms, connection relation is the prior art, is no longer described.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical characteristic into
Row equivalent substitution, such as gathers other chips or operational amplification circuit realizes function of the present invention；And these modification or
It replaces, the essence of appropriate technical solution is not made to depart from the scope of various embodiments of the present invention technical solution.
Claims (8)
1. a kind of smoke machine board failure positioner, it is characterised in that：Including central processing unit, D/A converter module, electric current
Amplification module, for be connected with component end probe, for component end or smoke machine circuit board ground end ground connection
Permanent ground terminal, signal acquisition module, analog-to-digital conversion module and display, the output terminal connection D/A converter module of central processing unit
Input terminal, the input terminal of the output terminal connection Current amplifier module of D/A converter module, the output terminal and letter of Current amplifier module
The input terminal difference linking probe of number acquisition module, and form access, signal acquisition between probe, component to be measured and permanent ground terminal
The input terminal of the output terminal connection analog-to-digital conversion module of module, the input of the output terminal connection central processing unit of analog-to-digital conversion module
End, the output terminal connection display of central processing unit.
2. smoke machine board failure positioner according to claim 1, it is characterised in that：The number of the probe is
Multiple and described smoke machine board failure positioners further includes time division multiplexing module and interface panel, the interface surface
Multiple relays are provided in plate, and relay is corresponded with probe；The input terminal and central processing unit for the module that is time-multiplexed
Output terminal be connected, the output terminal for the module that is time-multiplexed connects the input terminal of each relay respectively, and each relay
Input terminal is also connected with the output terminal of Current amplifier module, and the output terminal of each relay connects the input terminal of corresponding probe respectively,
All probes are all connected with the input terminal of signal acquisition module.
3. smoke machine board failure positioner according to claim 2, it is characterised in that：In the interface panel also
False impulse module including controlled ground terminal, for controlling controllably terminal voltage, the input terminal connection center of false impulse module
The output terminal of processor, the output terminal of false impulse module connect controlled ground terminal.
4. smoke machine board failure positioner according to claim 3, it is characterised in that：The false impulse module
Circuit include chip 4052, false impulse input peripheral circuit and false impulse output peripheral circuit；
False impulse input peripheral circuit includes first resistor, and first resistor input terminal connects the output terminal of central processing unit, the
One resistance output terminal connects 12 feet of chip 4052；False impulse input peripheral circuit further includes second resistance, operation amplifier core
The first TL084 of piece, the first capacitance, 3rd resistor and the 4th resistance, second resistance input terminal connect the output terminal of central processing unit,
The output terminal of second resistance connects 6 feet of the first TL084, the 5 feet ground connection of the first TL084, between 6 feet and 7 feet of the first TL084
3rd resistor, the first capacitance of 3rd resistor both ends parallel connection are connected, the output terminal of the first TL084 connects the 4th resistance, the 4th resistance
Output terminal connects 5 feet of chip 4052；The 9 feet connection external signal of chip 4052, so as to which false impulse module be controlled to be exported
The presence or absence of pulse signal, the 10 feet connection external signal of chip 4052, so as to control the pulse that false impulse module is exported
Signal it is positive and negative；2 feet of chip 4052,4 feet, 6 feet, 11 ends ground connection；
False impulse output peripheral circuit includes operational amplifier L165, cathode voltage circuit, cathode voltage circuit, the 5th electricity
Resistance, the 6th resistance, the 7th resistance and the 8th resistance；Cathode voltage circuit includes the first Zener diode, the second capacitance, and first is neat
Receive the anode connection -15V voltage sources of diode, 11 feet of the cathode connection L165 of the first Zener diode, the second capacitance is just
Pole is grounded, 11 feet of the cathode connection L165 of the second capacitance；Cathode voltage circuit includes the second Zener diode, the 3rd capacitance,
Second Zener diode cathode connection+15V voltage sources, 4 feet of the anode connection L165 of the second Zener diode, the 3rd capacitance
Cathode is grounded, 4 feet of the anode connection L165 of the 3rd capacitance；
2 feet of the 3 feet connection L165 of chip 4052, the 3 feet ground connection of L165,13 feet of chip 4052 connect the 7th resistance respectively
Input terminal and the 8th resistance input terminal, the 7th resistance output terminal connection L165 1 foot, the 8th resistance output termination
Ground；1 foot of L165 connects the input terminal of the 6th resistance, and the input terminal of the 6th resistance passes through the 5th resistance eutral grounding, the 6th resistance
Output terminal connecting interface panel in controlled ground terminal.
5. smoke machine board failure positioner according to claim 1, it is characterised in that：The D/A converter module
It is made of chip DAC0800 and its peripheral circuit.
6. smoke machine board failure positioner according to claim 1, it is characterised in that：The analog-to-digital conversion module
It is made of chip AD7475 and its peripheral circuit.
7. smoke machine board failure positioner according to claim 1, it is characterised in that：The Current amplifier module
Including operation amplifier chip LM759 and its peripheral circuit, the peripheral circuit includes the 9th resistance, the tenth resistance, the 11st
Resistance, the 12nd resistance, the 13rd resistance, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th
Resistance, the 19th resistance and the 20th resistance, two pole of the 4th capacitance and the 5th capacitance, the first zener diode and the second voltage stabilizing
Pipe；
4 feet of LM759 pass through the 14th resistance connection -15V electricity by the 9th resistance connection+15V voltage sources, 11 feet of LM759
Potential source；
2 feet of LM759 connect the output terminal of D/A converting circuit, the 4th electricity of the 12nd resistance both ends parallel connection by the 12nd resistance
Hold, the 12nd resistance output terminal connects the 13rd resistance, and the 13rd resistance output terminal is divided into two-way, is grounded all the way, and another way connects
Connect 3 feet of LM759；The input terminal of 13rd resistance also connects external bias by the tenth resistance, and the output terminal of the tenth resistance connects
Connect the input terminal of the 11st resistance, 1 foot of the input terminal connection LM759 of the 11st resistance, the 15th electricity of 1 foot connection of LM759
The input terminal of resistance, the output head grounding of the 15th resistance；16th resistance is connected with the 5th capacitance, and the 16th resistance and the 5th
The series circuit that capacitance is formed is parallel to the 15th resistance both ends；The anode of first zener diode connects the defeated of the 15th resistance
Enter end, the cathode of the first zener diode connects the cathode of the second zener diode, the plus earth of the second zener diode；The
19 resistance are connected with the 20th resistance, and the 19th resistance input terminal connects the anode of the first zener diode, the 20th electricity
Hinder output head grounding；17th resistance, the input terminal of the 18th resistance are all connected with 19 resistance input terminals, the output of the 17th resistance
End output sine wave signal, the sine wave signal of the 18th resistance output terminal output, the 19th resistance output terminal output sine wave
Signal, the 17th resistance output terminal, the 18th resistance output terminal and the 19th resistance output terminal are connected not respectively by relay
Same probe.
8. smoke machine board failure positioner according to claim 1, it is characterised in that：The signal acquisition circuit
It is described including the 3rd TL084 of chip PGA203 and its peripheral circuit, the 2nd TL084 of operation amplifier chip and operation amplifier chip
Peripheral circuit include slide rheostat, the 21st resistance, the 22nd resistance, the 23rd resistance, the 24th resistance,
25th resistance, the 26th resistance, the 27th resistance；
The slide plate input terminal connection+15v power supplys of slide rheostat, 6 feet of one end connection chip PGA203 of slide rheostat, separately
9 feet of one end connection chip PGA203；7 feet of chip PGA203 are grounded by the 21st resistance R21；The 8 of chip PGA203
Foot linking probe；1 foot of chip PGA203 and 2 feet connection external control signal, realize the gain of the current signal to being gathered
Control, 5 feet of chip PGA203 connect the 7th capacitance, the 7th capacitance output head grounding, the 4 feet ground connection of chip PGA203；Chip
11 feet of 10 feet the 6th capacitance of connection of PGA203, the 6th capacitance output terminal and chip PGA203 are all connected with the 12 of chip PGA203
Foot, 12 feet of chip PGA203 connect the input terminal of the 22nd resistance；
It sets with the operation amplifier chip TL084 that the output terminal of the 22nd resistance is connected as the 2nd TL084, the 22nd resistance
Output terminal connect 9 feet of the 2nd TL084, the 10 feet ground connection of the 2nd TL084,9 feet of the 2nd TL084 connect the 23rd resistance
Input terminal, 8 feet of the 2nd TL084 connect the output terminal of the 23rd resistance, the output terminal connection second of the 23rd resistance
The input terminal of 14 resistance R24；
It sets with the operation amplifier chip TL084 that the output terminal of the 24th resistance is connected as the 3rd TL084, the 24th resistance
Output terminal connect the 3rd TL084 6 feet, the 25th resistance of connecting between 6 feet and outside reference of the 3rd TL084；3rd
6 feet of TL084 connect the input terminal of the 26th resistance, and the output terminal of the 26th resistance connects 7 feet of the 3rd TL084, the
7 feet of three TL084 connect the input terminal of the 27th resistance R27, the output terminal connection analog-to-digital conversion mould of the 27th resistance R27
The input terminal of block；The 5 feet ground connection of 3rd TL084.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721233056.7U CN207396676U (en) | 2017-09-25 | 2017-09-25 | A kind of smoke machine board failure positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721233056.7U CN207396676U (en) | 2017-09-25 | 2017-09-25 | A kind of smoke machine board failure positioner |
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| Publication Number | Publication Date |
|---|---|
| CN207396676U true CN207396676U (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721233056.7U Active CN207396676U (en) | 2017-09-25 | 2017-09-25 | A kind of smoke machine board failure positioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688144A (en) * | 2017-09-25 | 2018-02-13 | 河南中烟工业有限责任公司 | A kind of cigarette mounted circuit board fault locator |
| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
-
2017
- 2017-09-25 CN CN201721233056.7U patent/CN207396676U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688144A (en) * | 2017-09-25 | 2018-02-13 | 河南中烟工业有限责任公司 | A kind of cigarette mounted circuit board fault locator |
| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
| CN109696902B (en) * | 2018-12-06 | 2022-06-10 | 奇瑞汽车股份有限公司 | Signal recording device, fault point detection circuit and method |
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