CN109507572A - It is a kind of for detecting the test circuit and test device of printed inductance - Google Patents
It is a kind of for detecting the test circuit and test device of printed inductance Download PDFInfo
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- CN109507572A CN109507572A CN201811647228.4A CN201811647228A CN109507572A CN 109507572 A CN109507572 A CN 109507572A CN 201811647228 A CN201811647228 A CN 201811647228A CN 109507572 A CN109507572 A CN 109507572A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to the field of test technology, it provides a kind of for detecting the test circuit and test device of printed inductance, radiofrequency signal occurs module and receives power supply signal to generate radiofrequency signal and high-frequency signal corresponding with the radiofrequency signal, buffering isolation is carried out to high-frequency signal by isolation module, and export frequency stabilization signal corresponding with the radiofrequency signal, frequency stabilization signal is compared with preset reference frequency signal by comparing module, and export corresponding voltage comparison signal, corresponding alarm signal is exported according to voltage comparison signal by alarm modules, to realize the detection to printed inductance, and alarm is carried out when printed inductance does not meet preset value, the distribution capacity and distributed inductance that solve existing digital electric bridge wiring are much larger than the distribution capacity and distributed inductance of tested printed circuit board, cause measuring accuracy compared with Low problem.
Description
Technical field
The embodiment of the present invention belong to the field of test technology more particularly to a kind of test circuit for detecting printed inductance and
Test device.
Background technique
High frequency electrical signal carrier usually has: coaxial cable, waveguide, the printed circuit board (Printed for transmitting high frequency circuit board
Circuit Board, PCB).Since high frequency electrical signal is easy to happen attenuation, the instrument of high-frequency signal is generated in preparation
During device, the consistency of the high frequency printed circuit board in instrument is put forward higher requirements, if the quality of printed circuit board
Control is not stringent, and the patch and welding assembly that will lead in subsequent technique all become non-productive work, and therefore, high frequency is printed
The test of circuit board is it is also proposed that requirements at the higher level.
However, the distribution capacity and distributed inductance of existing digital electric bridge wiring are much larger than the distribution of tested printed circuit board
Capacitor and distributed inductance, with the lower problem of measuring accuracy.
Summary of the invention
The embodiment of the present invention provides a kind of for detecting the test circuit and test device of printed inductance, it is intended to solve existing
Digital electric bridge wiring distribution capacity and distributed inductance be much larger than the distribution capacity and distributed inductance of tested printed circuit board, lead
The problem for causing measuring accuracy lower.
The embodiment of the invention provides a kind of for detecting the test circuit of printed inductance, connect with power module, wherein
For providing power supply signal, the test circuit includes: the power module
Connect with the power module, for receiving the power supply signal, and generate radiofrequency signal and with the radio frequency
Module occurs for the radiofrequency signal of the corresponding high-frequency oscillation signal of signal；
Module occurs with the power module and the radiofrequency signal to connect, for carrying out buffer compartment to the high-frequency signal
From, and export the isolation module of frequency stabilization signal corresponding with the radiofrequency signal；
It is connect with the power module and the isolation module, for receiving the frequency stabilization signal, and by the frequency
Rate stabilization signal is compared with preset reference frequency signal, and exports the comparison module of corresponding voltage comparison signal；With
And
It is connect with the power module and the comparison module, for receiving the voltage comparison signal, and in the electricity
The alarm modules of signal an alert when comparison signal being pressed to be greater than preset alarm voltage threshold.
Optionally, the test circuit further include:
It is connect with the power module, for showing that the display module of the working condition of module occurs for the radiofrequency signal.
Optionally, the radiofrequency signal generation module includes:
It is connect with the power module, exports high frequency vibrating for receiving the power supply signal, and according to the power supply signal
Swing the oscillating unit of signal；And
It is connect with the oscillating unit, for receiving the oscillator signal, and it is corresponding according to oscillator signal output
The sensing unit of radiofrequency signal.
Optionally, the oscillating unit include: first resistor, second resistance, 3rd resistor, the 4th resistance, first capacitor,
Second capacitor, third capacitor, the 4th capacitor and first switch tube；
The first end of the first end of the first resistor, the first end of the first capacitor and the 3rd resistor connects altogether
In the cathode output end of the power module, the second end of the first resistor, the first end of the second resistance, described second
The control terminal of the first end of capacitor and the first switch tube connects altogether, the second end of the 3rd resistor, the third capacitor
First end and the input terminal of the first switch tube connect altogether, and connect with the sensing unit, be used for outputting oscillation signal,
The second end of the third capacitor, the first end of the 4th capacitor, the first end of the 4th resistance and described first open
Close pipe output end connect altogether, the second end of the first capacitor, the second end of the second resistance, second capacitor second
The second end at end, the second end of the 4th resistance and the 4th capacitor is connected to ground altogether.
Optionally, the sensing unit includes: the 5th capacitor and the first inductance；
The first end of 5th capacitor is connect with the signal output end of the oscillating unit, and the second of the 5th capacitor
End is connect with the first end of first inductance, the second end ground connection of first inductance.
Optionally, the isolation module includes: the 6th capacitor, the 5th resistance, the 6th resistance, the 7th resistance and second opens
Guan Guan；
The first end of 6th capacitor occurs module with the radiofrequency signal and connect, the second end of the 6th capacitor,
First end, the first end of the 6th resistance and the control terminal of the second switch of 5th resistance connect altogether, described
The cathode output end of the second end of 5th resistance, the input terminal of the second switch and the power module connects altogether, described
The output end of second switch and the first end of the 7th resistance connect altogether, and connect with the comparison module, the 6th electricity
The second end of resistance and the second end of the 7th resistance are connected to ground altogether.
Optionally, the comparison module includes: the 7th capacitor, the first adjustable resistance and frequency comparator；
The first end of 7th capacitor is connected with the negative input of the frequency comparator, for receiving the frequency
Stabilization signal, the power end of the frequency comparator, the first end of first adjustable resistance and the power module are just
Pole output end connects altogether, and the control terminal of first adjustable resistance is connect with the electrode input end of the frequency comparator, and described
The ground terminal of the second end of one adjustable resistance, the second end of the 7th capacitor and the frequency comparator is connected to ground, institute altogether
The output end of frequency comparator is stated for exporting the voltage comparison signal.
Optionally, the alarm modules include: the 8th resistance, third switching tube and alarm；
The first end of 8th resistance is connect with the comparison module, the second end and the third of the 8th resistance
The control terminal of switching tube connects, and the input terminal of the third switching tube is connect with the first end of the alarm, the alarm
Second end connect with the power module, the output end of third switching tube ground connection.
Optionally, the alarm modules further include: the 9th resistance, the first light emitting diode, the tenth resistance and the 4th open
Guan Guan；
The first end of 9th resistance is connect with the power module, and the second end of the 9th resistance shines with described
The positive terminal of diode connects, and the negative pole end of the light emitting diode is connect with the input terminal of the 4th switching tube, and described the
The control terminal of four switching tubes is connect with the first end of the tenth resistance, the second end of the tenth resistance and the 8th resistance
First end connection, the 4th switching tube output end ground connection.
The invention also provides a kind of for detecting the test device of printed inductance, and the test device includes:
For providing the power module of power supply signal；And
Test circuit as described in any one of the above embodiments, wherein the test circuit is connect with the power module.
The embodiment of the invention provides a kind of for detecting the test circuit and test device of printed inductance, radiofrequency signal hair
Raw module receives power supply signal to generate radiofrequency signal and high-frequency signal corresponding with the radiofrequency signal, passes through isolation module pair
High-frequency signal carries out buffering isolation, and exports frequency stabilization signal corresponding with the radiofrequency signal, by comparing module to frequency
Rate stabilization signal is compared with preset reference frequency signal, and exports corresponding voltage comparison signal, passes through alarm modules
Corresponding alarm signal is exported according to voltage comparison signal, to realize the detection to printed inductance, and is not inconsistent in printed inductance
Alarm is carried out when closing preset value, the distribution capacity and distributed inductance for solving existing digital electric bridge wiring are much larger than tested printing electricity
The distribution capacity and distributed inductance of road plate, lead to the problem that measuring accuracy is lower.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the knot for testing circuit and test device for being used to detect printed inductance that one embodiment of the present of invention provides
Structure schematic diagram；
Fig. 2 be another embodiment of the present invention provides for detecting the test circuit and test device of printed inductance
Structural schematic diagram；
Fig. 3 be another embodiment of the present invention provides for detecting the test circuit and test device of printed inductance
Structural schematic diagram；
Fig. 4 is the operation principle schematic diagram for the inductive head that one embodiment of the present of invention provides；
Fig. 5 is the structural schematic diagram for the alarm modules that one embodiment of the present of invention provides；
Fig. 6 be another embodiment of the present invention provides alarm modules structural schematic diagram；
Fig. 7 is the structural schematic diagram for the display module that one embodiment of the present of invention provides.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is the present invention one
The embodiment divided, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, should fall within the scope of the present invention.
Description and claims of this specification and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
Fig. 1 is provided in an embodiment of the present invention for detecting the test circuit of printed inductance, as shown in Figure 1, the present embodiment
In test circuit connect with power module 10, wherein the power module 10 is for providing power supply signal, the test circuit
Include:
It is connect with the power module 10, for receiving the power supply signal, and generates radiofrequency signal and penetrated with described
Module 20 occurs for the radiofrequency signal of the corresponding high-frequency oscillation signal of frequency signal；
Module 20 occurs with the power module 10 and the radiofrequency signal to connect, for delaying the high-frequency signal
Punching isolation, and export the isolation module 30 of frequency stabilization signal corresponding with the radiofrequency signal；
It is connect with the power module 10 and the isolation module 30, for receiving the frequency stabilization signal, and by institute
It states frequency stabilization signal to be compared with preset reference frequency signal, and exports the comparison module of corresponding voltage comparison signal
40；And
It is connect with the power module 10 and the comparison module 40, for receiving the voltage comparison signal, and in institute
The alarm modules 50 of signal an alert when stating voltage comparison signal greater than preset alarm voltage threshold.
In the present embodiment, module 20 occurs for radiofrequency signal by inductive head generation radiofrequency signal, which belongs to
Electromagnetic wave, when the magnetic line of force in electromagnetic wave is printed the metal copper ring inductance cutting in circuit board, module 20 occurs for radiofrequency signal
In inductive head around the magnetic line of force item number reduce, at this point, the inductance of inductive head reduces, due to qualified printed circuit board
Inductance sensibility reciprocal is different from the metal ring closure in bad printed circuit board, and the inductance sensibility reciprocal generated is different, therefore, radio frequency
The blocking degree of isolation of the magnetic line of force around inductive head in signal generating module 20 is different, and the frequency of radiofrequency signal is different,
It is also different that the high-frequency signal that module 20 exports occurs for radiofrequency signal.When high-frequency signal is converted to correspondence by isolation module 30
Frequency stabilization signal be compared with preset reference frequency signal, if the frequency stabilization signal and preset reference frequency are believed
Difference between number then judges printed circuit board qualification within the scope of preset difference value, the not signal an alert of alarm modules 50,
If the voltage that the difference between the frequency stabilization signal and preset reference frequency signal not within the scope of preset difference value, exports
Comparison signal is greater than preset alarm voltage threshold, and alarm modules 50 judge that the printed circuit board is unqualified, and alarm modules 50 are sent out
Alarm signal out.
In one embodiment, by the fixed test print circuit board of positioning column, it can reduce human body distribution capacity and divide
The influence that cloth inductance generates improves the accuracy of test array.
In one embodiment, the survey for being used to detect printed inductance that Fig. 2 provides for the another embodiment of the application
The structural schematic diagram for trying circuit, as shown in Fig. 2, the test circuit in the present embodiment further include:
Connect 10 with the power module to connect, for showing that the display mould of the working condition of module 20 occurs for the radiofrequency signal
Block 60.
In this example it is shown that the first end of module 60 is connect with the cathode output end of power module 10, display module
60 second end is connect with the cathode output end of power module 10, wherein the cathode output end of power module 10 is grounded.
In one embodiment, referring to Fig. 3, the radiofrequency signal in the present embodiment occurs module 20 and includes:
It is connect with the power module 10, exports high frequency for receiving the power supply signal, and according to the power supply signal
The oscillating unit 21 of oscillator signal；And
It is connect with the oscillating unit 21, for receiving the oscillator signal, and is exported and corresponded to according to the oscillator signal
Radiofrequency signal sensing unit 22.
In the present embodiment, oscillating unit 21 and sensing unit 22 can form a common base capacitance three-point type oscillation electricity
Road, wherein the frequency that the radiofrequency signal that module 20 generates occurs for radiofrequency signal is mainly determined by sensing unit 22, single by induction
Member 22 is to space radiated electromagnetic wave, to detect to product to be measured.
In one embodiment, when the power supply signal that power module 10 provides is the operating current for having alternation, sensing unit
22 radiate alternate magnetic force line to space.
In one embodiment, oscillating unit 21 includes power supply signal input, ground terminal and oscillator signal output end,
Wherein, the power supply signal input of oscillating unit 21 can be used as the power supply signal input that module 20 occurs for radiofrequency signal, vibration
The ground terminal for swinging unit 21 is connect with the ground terminal that module 20 occurs for radiofrequency signal, the high oscillator signal output end of oscillating unit 21
It can be used as the high-frequency oscillation signal output end that module 20 occurs for radiofrequency signal.
In one embodiment, referring to Fig. 3, the oscillating unit 21 in the present embodiment includes: first resistor R1, second resistance
R2,3rd resistor R3, the 4th resistance R4, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4 and first
Switching tube Q1；
Specifically, the first end of the first resistor R1, the first end and the 3rd resistor of the first capacitor C1
The first end of R3 is connected to the cathode output end of the power module 10, the second end of the first resistor R1, second electricity altogether
First end, the first end of the second capacitor C2 and the control terminal of the first switch tube Q1 of resistance R2 connects altogether, the third
The input terminal of the second end of resistance R3, the first end of the third capacitor C3 and the first switch tube Q1 connects altogether, and with institute
The connection of sensing unit 22 is stated, for exporting high-frequency oscillation signal, the second end of the third capacitor C3, the 4th capacitor C4
The output end of first end, the first end of the 4th resistance R4 and the first switch tube Q1 connects altogether, the first capacitor C1
Second end, the second end of the second resistance R2, the second end of the second capacitor C2, the second end of the 4th resistance R4
And the second end of the 4th capacitor C4 is connected to ground altogether.
In one embodiment, third capacitor C3 can form positive-feedback circuit, feed back to high-frequency oscillation signal.
In one embodiment, first switch tube Q1 is NPN type triode, and the current collection of NPN type triode extremely first is opened
The input terminal of pipe Q1 is closed, the base stage of NPN type triode is the control terminal of first switch tube Q1, and the transmitting of NPN type triode is extremely
The output end of first switch tube Q1.
In one embodiment, referring to Fig. 3, the sensing unit 22 in the present embodiment includes: the electricity of the 5th capacitor C5 and first
Feel L1；
The first end of the 5th capacitor C5 is connect with the signal output end of the oscillating unit 21, the 5th capacitor C5
Second end connect with the first end of the first inductance L1, the second end of the first inductance L1 ground connection.
In the present embodiment, the inductive head of module 20 occurs as radiofrequency signal for sensing unit 22, and Fig. 4 is the work of inductive head
Making schematic diagram, wherein the frequency Fref of radiofrequency signal that sensing unit 22 generates determines by the 5th capacitor C5 and the first inductance L1,
Such as following formula:
Fref=1/ [2 π * (LC)1/2]；
Wherein, L is the inductance value of the first inductance L1, and C is the capacitance of the 5th capacitor C5.
In one embodiment, referring to Fig. 3 it is found that the isolation module 30 include: the 6th capacitor C6, the 5th resistance R5,
6th resistance R6, the 7th resistance R7 and second switch Q2；
It is connect specifically, with the radiofrequency signal module 20 occurs for the first end of the 6th capacitor C6, the 6th electricity
Hold the second end of C6, the first end of the 5th resistance R5, the first end and the second switch of the 6th resistance R6
The control terminal of Q2 connects altogether, the second end of the 5th resistance R5, the input terminal of the second switch Q2 and the power supply mould
The cathode output end of block 10 connects altogether, and the output end of the second switch Q2 and the first end of the 7th resistance R7 connect altogether, and
It is connect with the comparison module 40, the second end of the 6th resistance R6 and the second end of the 7th resistance R7 are connected to ground altogether.
In one embodiment, second switch Q2 is NPN type triode, and the current collection of NPN type triode extremely second is opened
The input terminal of pipe Q2 is closed, the base stage of NPN type triode is the control terminal of second switch Q2, and the transmitting of NPN type triode is extremely
The output end of second switch Q2.
In one embodiment, the comparison module 40 includes: the 7th capacitor C7, the first adjustable resistance RP1 and frequency
Comparator U1；
Specifically, the first end of the 7th capacitor C7 is connected with the negative input IN- of the frequency comparator U1, use
In receiving the frequency stabilization signal, the first of the power end VCC of the frequency comparator U1, the first adjustable resistance RP1
The cathode output end of end and the power module 10 connects altogether, the control terminal of the first adjustable resistance RP1 and the frequency ratio
Electrode input end IN+ connection compared with device U1, second end, the second end of the 7th capacitor C7 of the first adjustable resistance RP1
And the ground terminal GND of the frequency comparator U1 is connected to ground altogether, the output end OUT of the frequency comparator U1 is for exporting institute
State voltage comparison signal.
In the present embodiment, by adjusting the resistance value of the first adjustable resistance RP1, so as to adjust the anode of frequency comparator U1
The size Fr of the reference frequency signal of input terminal IN+ input, the reference frequency signal can be used as preset reference frequency signal
The frequency stabilization signal exported with isolation module 30 is compared, and the printing of sample to be tested is judged according to its difference Fref-Fr
Within a preset range whether inductance, if not within a preset range, exporting high level signal, warned with controlling the output of alarm modules 50
The number of notifying.
In one embodiment, can by adjusting the resistance value of the first adjustable resistance RP1 with adjust frequency stabilization signal with
Difference range between preset reference frequency signal is adjusted with the measuring accuracy to test circuit.
On the other hand, by adjusting the resistance value of the first adjustable resistance RP1 to adjust frequency stabilization signal and preset reference
Difference between frequency signal can also meet the testing requirement of different product, for requiring lower test print circuit board,
Can by adjusting the first adjustable resistance RP1 resistance value to increase between frequency stabilization signal and preset reference frequency signal
Difference range, to meet different product specifications.
In one embodiment, referring to Fig. 5, the alarm modules 50 include: the 8th resistance R8, third switching tube Q3 and
Alarm BZ1；
Specifically, the first end of the 8th resistance R8 is connect with the comparison module 40, the of the 8th resistance R8
Two ends are connect with the control terminal of the third switching tube Q3, and the input terminal of the third switching tube Q3 is with the alarm BZ1's
First end connection, the second end of the alarm BZ1 are connect with the power module 10, the output end of the third switching tube Q3
Ground connection.
In the present embodiment, if the difference between frequency stabilization signal and preset reference frequency signal has exceeded default model
It encloses, then the voltage comparison signal that comparison module 40 exports is high level signal, and third switching tube Q3 is connected at this time, alarm BZ1
Issue alarm signal.
In one embodiment, third switching tube Q3 is NPN type triode, and the current collection of NPN type triode extremely third is opened
The input terminal of pipe Q3 is closed, the base stage of NPN type triode is the control terminal of third switching tube Q3, and the transmitting of NPN type triode is extremely
The output end of third switching tube Q3.
In one embodiment, referring to Fig. 6, the alarm modules 50 further include: the 9th resistance R9, the first light emitting diode
LED1, the tenth resistance R10 and the 4th switching tube Q4；
Specifically, the first end of the 9th resistance R9 is connect with the power module 10, the of the 9th resistance R9
Two ends are connect with the positive terminal of the Light-emitting diode LED 1, the negative pole end of the Light-emitting diode LED 1 and the 4th switch
The input terminal of pipe Q4 connects, and the control terminal of the 4th switching tube Q4 is connect with the first end of the tenth resistance R10, and described the
The second end of ten resistance R10 is connect with the first end of the 8th resistance R8, the output end ground connection of the 4th switching tube Q4.
In the present embodiment, if the difference between frequency stabilization signal and preset reference frequency signal has exceeded default model
It encloses, then the voltage comparison signal that comparison module 40 exports is high level signal, and the 4th switching tube Q4 is connected at this time, light emitting diode
LED1 is lighted, to show alarm condition to user.
In one embodiment, the device property of the 4th switching tube Q4 determines the conducting voltage of the 4th switching tube Q4,
Determine preset alarm voltage threshold, therefore, user can be by the 4th switching tube Q4 that selection needs to preset alarm
Voltage threshold is configured.
In one embodiment, the voltage of the 4th switching tube Q4 conducting is greater than the voltage of third switching tube Q3 conducting, at this point,
For that can judge the damage journey of the printed inductance of sample to be tested according to the alarm condition of alarm BZ1 and Light-emitting diode LED 1
Degree, achievees the purpose that quickly to detect sample to be tested.
In one embodiment, the 4th switching tube Q4 is NPN type triode, and the current collection of NPN type triode the extremely the 4th is opened
The input terminal of pipe Q4 is closed, the base stage of NPN type triode is the control terminal of the 4th switching tube Q4, and the transmitting of NPN type triode is extremely
The output end of 4th switching tube Q4.
In one embodiment, referring to Fig. 7, the display module 60 in the present embodiment includes: eleventh resistor R11 and second
Light-emitting diode LED 2；Specifically, first end of the first end of eleventh resistor R11 as display module 60, eleventh resistor
The second end of R11 is connect with the anode of the second Light-emitting diode LED 2, and the cathode of the second Light-emitting diode LED 2 is as display mould
The second end of block 60 is grounded.
The invention also provides a kind of for detecting the test device of printed inductance, and the test device includes:
For providing the power module 10 of power supply signal；And
Test circuit as described in any one of the above embodiments, wherein the test circuit is connect with the power module.
The embodiment of the invention provides a kind of for detecting the test circuit and test device of printed inductance, radiofrequency signal hair
Raw module receives power supply signal to generate radiofrequency signal and high-frequency signal corresponding with the radiofrequency signal, passes through isolation module pair
High-frequency signal carries out buffering isolation, and exports frequency stabilization signal corresponding with the radiofrequency signal, by comparing module to frequency
Rate stabilization signal is compared with preset reference frequency signal, and exports corresponding voltage comparison signal, passes through alarm modules
Corresponding alarm signal is exported according to voltage comparison signal, to realize the detection to printed inductance, and is not inconsistent in printed inductance
Alarm is carried out when closing preset value, the distribution capacity and distributed inductance for solving existing digital electric bridge wiring are much larger than tested printing electricity
The distribution capacity and distributed inductance of road plate, lead to the problem that measuring accuracy is lower.
The foregoing is merely alternative embodiments of the invention, are not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. it is a kind of for detecting the test circuit of printed inductance, it is connect with power module, which is characterized in that the test circuit packet
It includes:
Connect with the power module, for receiving the power supply signal of power module output, and generate radiofrequency signal and
Module occurs for the radiofrequency signal of high-frequency oscillation signal corresponding with the radiofrequency signal；
Module occurs with the power module and the radiofrequency signal to connect, for carrying out buffering isolation to the high-frequency signal,
And export the isolation module of frequency stabilization signal corresponding with the radiofrequency signal；
It is connect with the power module and the isolation module, for receiving the frequency stabilization signal, and the frequency is steady
Determine signal to be compared with preset reference frequency signal, and exports the comparison module of corresponding voltage comparison signal；And
It is connect with the power module and the comparison module, for receiving the voltage comparison signal, and in the voltage ratio
The alarm modules of signal an alert when being greater than preset alarm voltage threshold compared with signal.
2. test circuit as described in claim 1, which is characterized in that the test circuit further include:
It is connect with the power module, for showing that the display module of the working condition of module occurs for the radiofrequency signal.
3. test circuit as described in claim 1, which is characterized in that the radiofrequency signal occurs module and includes:
It is connect with the power module, exports higher-order of oscillation letter for receiving the power supply signal, and according to the power supply signal
Number oscillating unit；And
It is connect with the oscillating unit, exports corresponding radio frequency for receiving the oscillator signal, and according to the oscillator signal
The sensing unit of signal.
4. test circuit as claimed in claim 3, which is characterized in that the oscillating unit includes: first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, first capacitor, the second capacitor, third capacitor, the 4th capacitor and first switch tube；
The first end of the first end of the first resistor, the first end of the first capacitor and the 3rd resistor is connected to institute altogether
State the cathode output end of power module, the second end of the first resistor, the first end of the second resistance, second capacitor
First end and the control terminal of the first switch tube connect altogether, the of the second end of the 3rd resistor, the third capacitor
The input terminal of one end and the first switch tube connects altogether, and connect with the sensing unit, is used for outputting oscillation signal, described
The second end of third capacitor, the first end of the 4th capacitor, the first end and the first switch tube of the 4th resistance
Output end connect altogether, the second end of the first capacitor, the second end of the second resistance, the second end of second capacitor,
The second end of 4th resistance and the second end of the 4th capacitor are connected to ground altogether.
5. test circuit as claimed in claim 3, which is characterized in that the sensing unit includes: the 5th capacitor and the first electricity
Sense；
The first end of 5th capacitor is connect with the signal output end of the oscillating unit, the second end of the 5th capacitor with
The first end of first inductance connects, the second end ground connection of first inductance.
6. test circuit as described in claim 1, which is characterized in that the isolation module includes: the 6th capacitor, the 5th electricity
Resistance, the 6th resistance, the 7th resistance and second switch；
The first end of 6th capacitor and the radiofrequency signal occur module and connect, the second end of the 6th capacitor, described
The control terminal of the first end of 5th resistance, the first end of the 6th resistance and the second switch connects altogether, and the described 5th
The cathode output end of the second end of resistance, the input terminal of the second switch and the power module connects altogether, and described second
The output end of switching tube and the first end of the 7th resistance connect altogether, and connect with the comparison module, the 6th resistance
Second end and the second end of the 7th resistance are connected to ground altogether.
7. test circuit as described in claim 1, which is characterized in that the comparison module includes: the 7th capacitor, first adjustable
Resistance and frequency comparator；
The first end of 7th capacitor is connected with the negative input of the frequency comparator, for receiving the frequency stabilization
The anode of signal, the power end of the frequency comparator, the first end of first adjustable resistance and the power module is defeated
Outlet connects altogether, and the control terminal of first adjustable resistance is connect with the electrode input end of the frequency comparator, and described first can
Second end, the second end of the 7th capacitor and the ground terminal of the frequency comparator of resistance is adjusted to be connected to ground, the frequency altogether
The output end of rate comparator is for exporting the voltage comparison signal.
8. test circuit as described in claim 1, which is characterized in that the alarm modules include: the 8th resistance, third switch
Pipe and alarm；
The first end of 8th resistance is connect with the comparison module, and the second end and the third of the 8th resistance switch
The control terminal of pipe connects, and the input terminal of the third switching tube is connect with the first end of the alarm, and the of the alarm
Two ends are connect with the power module, the output end ground connection of the third switching tube.
9. test circuit as claimed in claim 8, which is characterized in that the alarm modules further include: the 9th resistance, the first hair
Optical diode, the tenth resistance and the 4th switching tube；
The first end of 9th resistance is connect with the power module, the second end of the 9th resistance and the light-emitting diodes
The positive terminal of pipe connects, and the negative pole end of the light emitting diode is connect with the input terminal of the 4th switching tube, and the described 4th opens
The control terminal for closing pipe is connect with the first end of the tenth resistance, and the of the second end of the tenth resistance and the 8th resistance
One end connection, the output end ground connection of the 4th switching tube.
10. a kind of for detecting the test device of printed inductance, which is characterized in that the test device includes such as claim 1-
9 described in any item test circuits, further include with the test circuit connection, for providing the power module of power supply signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811647228.4A CN109507572A (en) | 2018-12-29 | 2018-12-29 | It is a kind of for detecting the test circuit and test device of printed inductance |
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| CN201811647228.4A CN109507572A (en) | 2018-12-29 | 2018-12-29 | It is a kind of for detecting the test circuit and test device of printed inductance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115792713A (en) * | 2022-11-18 | 2023-03-14 | 宁畅信息产业(北京)有限公司 | Inductance open circuit detection device and system |
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| CN1520329A (en) * | 2000-12-21 | 2004-08-11 | Ict��˾ | Inductive sensory appts. |
| CN101399543A (en) * | 2008-09-19 | 2009-04-01 | 广州逸锋电子科技有限公司 | High frequency voltage controlled oscillator |
| CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
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2018
- 2018-12-29 CN CN201811647228.4A patent/CN109507572A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1520329A (en) * | 2000-12-21 | 2004-08-11 | Ict��˾ | Inductive sensory appts. |
| CN101399543A (en) * | 2008-09-19 | 2009-04-01 | 广州逸锋电子科技有限公司 | High frequency voltage controlled oscillator |
| CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115792713A (en) * | 2022-11-18 | 2023-03-14 | 宁畅信息产业(北京)有限公司 | Inductance open circuit detection device and system |
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