CN207396683U - A kind of device of measuring circuit plate ripple and noise signal - Google Patents
A kind of device of measuring circuit plate ripple and noise signal Download PDFInfo
- Publication number
- CN207396683U CN207396683U CN201721534861.3U CN201721534861U CN207396683U CN 207396683 U CN207396683 U CN 207396683U CN 201721534861 U CN201721534861 U CN 201721534861U CN 207396683 U CN207396683 U CN 207396683U
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- Prior art keywords
- coaxial cable
- signal
- connection terminal
- wire
- noise signal
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- 239000000523 sample Substances 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims description 34
- 239000004020 conductor Substances 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Abstract
The purpose of this utility model is to provide a kind of measuring circuit plate ripple and the device of noise signal, for solving the technical issues of raising is to the ripple signal of circuit board and noise signal test accuracy.It includes oscillograph, the first coaxial cable, the second coaxial cable and blocking module, the signal output part of first coaxial cable is electrically connected with the signal input part of oscillograph, it is electrically connected between first coaxial cable and the second coaxial cable by blocking module, the outer end of second coaxial cable is equipped with signal probe and grounded probe.Utility model content advantageous effect：Accurate to the ripple signal on circuit board and noise signal test, error is small.
Description
Technical field
The utility model is related to signal-testing apparatus technical field, specifically a kind of measuring circuit plate ripple and noise
The device of signal.
Background technology
It is traditional using the ripple signal and noise signal of oscillograph and mating passive probe test circuit plate when, due to
The ground wire of probe is longer, and the interference introduced to test result is bigger.And under AC couplings, the woods sensitivity of passive probe is minimum
It is worth for 10mV/div, and voltage ripple signals and noise signal may only have a few to tens of millivolts in the plate of printed circuit board (PCB), lead
Cause test result is inaccurate, and error is larger.
Utility model content
The purpose of this utility model is to provide a kind of measuring circuit plate ripples and device and its test side of noise signal
Method, for solving the technical issues of raising is to the ripple signal of circuit board and noise signal test accuracy.
The technical scheme in the invention for solving the technical problem is：
The device of a kind of measuring circuit plate ripple and noise signal, including oscillograph, the first coaxial cable, the second coaxial electrical
Cable and blocking module, the signal output part of first coaxial cable are electrically connected with the signal input part of oscillograph, and described first
It is electrically connected between coaxial cable and the second coaxial cable by blocking module, the outer end of second coaxial cable is visited equipped with signal
Head and grounded probe.
Further, first coaxial cable and the second coaxial cable include center conductor, first respectively from the inside to the outside
Insulating layer, outer conducting layer, second insulating layer and protective layer.
Further, the center conductor includes strands copper wire.
Further, the outer conducting layer uses netted copper conductive layer.
Further, the blocking module includes left wire connection terminal, capacitance and right wire connection terminal, the left and right both ends of capacitance
It is electrically connected respectively with the left wire connection terminal and right wire connection terminal.
Further, the left wire connection terminal and right wire connection terminal include the ground wire of both sides and intermediate signal respectively
Line, the signal wire of the left wire connection terminal are electrically connected with the center conductor of the first coaxial cable right end, left wire connection terminal
The outer conducting layer of ground wire and the first coaxial cable right end is electrically connected；The signal wire of the right wire connection terminal and second coaxial electrical
The outer conducting layer of the center conductor electrical connection of cable left end, the ground wire of right wire connection terminal and the second coaxial cable left end is electrically connected
It connects.
Further, the front end of the signal probe uses taper.
Further, the front end of the grounded probe uses elastic clip.
The effect provided in utility model content is only the effect of embodiment rather than all whole effects of utility model
Fruit, a technical solution in above-mentioned technical proposal has the following advantages that or advantageous effect：
(1) it is accurate the ripple signal on circuit board and noise signal to be tested, and error is small.
(2) first coaxial cables and the second coaxial cable can play the role of good signal transmission, simultaneously because in it
Portion is equipped with shielded layer, can preferably resist external signal interference.
The blocking module set between (3) first coaxial cables and the second coaxial cable can play direct current signal good
Good isolation effect.
Description of the drawings
Fig. 1 is the integrated connection relational structure schematic diagram of the utility model embodiment；
Fig. 2 is the structural profile illustration of the first coaxial cable in the utility model embodiment；
Fig. 3 is the principle schematic diagram of blocking module in the utility model embodiment；
In figure：1. oscillograph；2. the first coaxial cable；3. the second coaxial cable；4. blocking module；21. connector；22.
Center conductor；23. the first insulating layer；24. outer conducting layer；25. second insulating layer；26. protective layer；31. signal probe；32. it connects
It pops one's head on ground；41. left wire connection terminal；42. capacitance；43. right wire connection terminal.
Specific embodiment
In order to clearly illustrate the technical characterstic of this programme, below by specific embodiment, and its attached drawing is combined, to this
Utility model is described in detail.It should be noted that illustrated component is not drawn necessarily to scale in the accompanying drawings.The utility model
It is omitted and known assemblies and technology is described to be unnecessarily limiting the utility model.
As shown in Figure 1, a kind of measuring circuit plate ripple and the device of noise signal, including oscillograph 1, the first coaxial cable
2nd, the second coaxial cable 3 and blocking module 4.The signal output part of first coaxial cable 2 and the signal input part of oscillograph 1
Electrical connection, the signal input part of the first coaxial cable 2 are electrically connected with the signal output part of blocking module 4, the second coaxial cable 3
Signal output part is electrically connected with the signal input part of the blocking module 4, the signal input part and circuit board of the second coaxial cable 3
On corresponding contacts electrical connection.
Preferably, the minimum tuned sensitivities of the oscillograph 1 are 2mV/div, to improve its display precision.Described first
The comprehensive impedance of coaxial cable 2, the second coaxial cable 3 and blocking module 4 is 50 Ω, and the impedance of the circuit board is 50 Ω, with
Impedance matching is formed, ensures the accuracy of measurement result.As shown in Fig. 2, 2 and second coaxial cable 3 of the first coaxial cable
Include center conductor 22, the first insulating layer 23, outer conducting layer 24, second insulating layer 25 and protective layer 26 respectively；It leads at the center
Line 22 while electric conductivity is ensured, improves the flexibility of cable using stranded wire (copper wire)；First insulating layer 23 wraps
The outside of center conductor 22 is wound on, the first insulating layer 23 uses polythene material；The outer conducting layer 24 is arranged on first absolutely
The outside of edge layer 23, outer conducting layer 24 use netted copper conductive layer, play the role of shielded layer；The second insulating layer 25 is set
It puts in the outside of outer conducting layer 24, the protective layer 26 is arranged on the outside of second insulating layer 25, and protective layer 26 uses teflon
Material.The blocking module 4 is mainly used for isolating the DC component of tested electrical appliance module, retains its AC compounent, realizes oscillography
Device 1 obtains the ripple and noise signal to be tested.As shown in figures 1 and 3, blocking module 4 includes left wire connection terminal 41, capacitance
42 and right wire connection terminal 43, the capacitance 42 is equipped in parallel multiple, and the left and right both ends of capacitance 42 connect respectively with the left side
Line terminals 41 and right wire connection terminal 43 connect；Left wire connection terminal 41 and right wire connection terminal 43 include ground wire and the centre of both sides respectively
Signal wire.The signal wire of the left wire connection terminal 41 is electrically connected with the center conductor 22 of 2 right end of the first coaxial cable, left
The outer conducting layer 24 of 2 right end of the ground wire of wire connection terminal 41 and the first coaxial cable is electrically connected；The signal of the right wire connection terminal 43
Line is electrically connected with the center conductor 22 of 3 left end of the second coaxial cable, the ground wire of right wire connection terminal 43 and the second coaxial cable 3
The outer conducting layer 24 of left end is electrically connected.
As shown in Figure 1, the left end of first coaxial cable 2 is equipped with connector 21, the connector 21 is used for and institute
The signal input part grafting for stating oscillograph 1 uses.The right end of second coaxial cable 3 is respectively equipped with signal probe 31 and ground connection
Probe 32, signal probe 31 is electrically connected with the center conductor 22 of the second coaxial cable 3,32 and second coaxial cable 3 of grounded probe
Be electrically connected to ground.The front end of the signal probe 31 use taper, in order to the contact on circuit board；The ground connection
The front end of probe 32 is using elastic clip, the ground wire with circuit board to be facilitated to be clamped and connected.
A kind of method of measuring circuit plate ripple and noise signal：
When testing ripple signal, by the switched power output on the signal probe 31 of the second coaxial cable 3 and circuit board
Electrical connection, by the second grounded probe 32 of coaxial cable 3 and being electrically connected to ground on circuit board.In order to isolate noise signal to line
The influence of ripple test opens the limitation of oscillograph 20M bandwidth, some useless wave noises or high-frequency signal is filtered, and allows oscillography
The waveform that device 1 is shown is clearer, it is easier to observe.
During test noise signal, the letter of electrical module will be tested on the signal probe 31 of the second coaxial cable 3 and circuit board
Number input terminal electrical connection, by the second grounded probe 32 of coaxial cable 3 and being electrically connected to ground on circuit board.And close oscillograph
1 bandwidth limits or is arranged to the bandwidth limitation of 500M, ensures that test is noise rather than external disturbance on circuit board, and noise
Circuit board need to be operated under maximum load (or Business Stream) during test.
The advantages of the utility model embodiment, is：It is accurate to the ripple signal on circuit board and noise signal test, by mistake
Difference is small.First coaxial cable 2 and the second coaxial cable 3, can play the role of good signal transmission, simultaneously because being set inside it
There is shielded layer, can preferably resist external signal interference.Set between first coaxial cable 2 and the second coaxial cable 3 every
Straight module 4, can play direct current signal good isolation effect.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly
The limitation of type protection domain, on the basis of technical solutions of the utility model, those skilled in the art need not pay creativeness
The various modifications or changes that can make of work it is still within the protection scope of the present utility model.
Claims (8)
1. the device of a kind of measuring circuit plate ripple and noise signal, it is characterized in that, including oscillograph, the first coaxial cable,
Two coaxial cables and blocking module, the signal output part of first coaxial cable are electrically connected with the signal input part of oscillograph,
It is electrically connected between first coaxial cable and the second coaxial cable by blocking module, the outer end of second coaxial cable is set
There are signal probe and grounded probe.
2. the device of a kind of measuring circuit plate ripple according to claim 1 and noise signal, it is characterized in that, described first
Coaxial cable and the second coaxial cable include center conductor, the first insulating layer, outer conducting layer, second insulating layer respectively from the inside to the outside
And protective layer.
3. the device of a kind of measuring circuit plate ripple according to claim 2 and noise signal, it is characterized in that, the center
Conducting wire includes strands copper wire.
4. the device of a kind of measuring circuit plate ripple according to claim 2 and noise signal, it is characterized in that, it is described to lead outside
Electric layer uses netted copper conductive layer.
5. the device of a kind of measuring circuit plate ripple according to claim 2 and noise signal, it is characterized in that, the blocking
Module includes left wire connection terminal, capacitance and right wire connection terminal, the left and right both ends of capacitance respectively with the left wire connection terminal and the right side
Wire connection terminal is electrically connected.
6. the device of a kind of measuring circuit plate ripple according to claim 5 and noise signal, it is characterized in that, the left side
Wire connection terminal and right the wire connection terminal ground wire including both sides and intermediate signal wire respectively, the signal wire of the left wire connection terminal with
The center conductor electrical connection of the first coaxial cable right end, the ground wire of left wire connection terminal and the first the outer of coaxial cable right end are led
Electric layer is electrically connected；The signal wire of the right wire connection terminal is electrically connected with the center conductor of the second coaxial cable left end, and the right side connects
The outer conducting layer of the ground wire of line terminals and the second coaxial cable left end is electrically connected.
7. the device of a kind of measuring circuit plate ripple according to claim 1 and noise signal, it is characterized in that, the signal
The front end of probe uses taper.
8. the device of a kind of measuring circuit plate ripple according to claim 1 and noise signal, it is characterized in that, the ground connection
The front end of probe uses elastic clip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534861.3U CN207396683U (en) | 2017-11-16 | 2017-11-16 | A kind of device of measuring circuit plate ripple and noise signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534861.3U CN207396683U (en) | 2017-11-16 | 2017-11-16 | A kind of device of measuring circuit plate ripple and noise signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207396683U true CN207396683U (en) | 2018-05-22 |
Family
ID=62323775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721534861.3U Expired - Fee Related CN207396683U (en) | 2017-11-16 | 2017-11-16 | A kind of device of measuring circuit plate ripple and noise signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207396683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741561A (en) * | 2017-11-16 | 2018-02-27 | 郑州云海信息技术有限公司 | The device and its measuring method of a kind of measuring circuit plate ripple and noise signal |
-
2017
- 2017-11-16 CN CN201721534861.3U patent/CN207396683U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741561A (en) * | 2017-11-16 | 2018-02-27 | 郑州云海信息技术有限公司 | The device and its measuring method of a kind of measuring circuit plate ripple and noise signal |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 Termination date: 20181116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |