CN207181624U - A kind of circuit board interface welds detecting tool - Google Patents
A kind of circuit board interface welds detecting tool Download PDFInfo
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- CN207181624U CN207181624U CN201721195252.XU CN201721195252U CN207181624U CN 207181624 U CN207181624 U CN 207181624U CN 201721195252 U CN201721195252 U CN 201721195252U CN 207181624 U CN207181624 U CN 207181624U
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- circuit
- test
- circuit board
- power supply
- detecting tool
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Abstract
The utility model discloses a kind of circuit board interface to weld detecting tool, including body, detection circuit is provided with the body, probe adapter and plug, the probe adapter and plug are respectively used to be connected with the test point of circuit under test and external interface, the detection circuit on one side is connected with the probe adapter, other end is connected with the plug, circuit under test is made up of the connection of several sub-circuit boards, the test point is opened on the primary sub-circuit board of the circuit under test, the external interface is arranged on the final stage sub-circuit board of the circuit under test.Circuit board interface of the present utility model welds detecting tool, can fast and accurately detect the problems such as board to board connector, FPC, product external interface etc. whether there is rosin joint, even weldering, loose contact.
Description
Technical field
A kind of detecting tool is the utility model is related to, is to be related to a kind of circuit board interface welding detecting tool specifically.
Background technology
With making rapid progress for science and technology, the function of electronic product becomes increasingly complex, while consumption market is to the small-sized of product
Change demand also increasingly increases, in face of the intelligent terminal such as miniaturization of the electronic product such as mobile phone, flat board, wearable device, densification
Trend, the internal structures of these electronic products is increasingly finer, miniaturization.Terminal inner often has polylith circuit board or electronics
Element needs to be attached by board to board connector or FPC.Reliability and matter of the connection of terminal inner too many levels to product
Amount is a kind of test.Especially in production link, the correctness that this too many levels connects how is detected, for detection method and detection
Frock proposes higher requirement.
The content of the invention
Connection relies primarily on software test to the utility model between the inner panel of existing miniature precision electronic product in order to solve,
There is no the technical problem of a set of reliable test fixture, it is proposed that a kind of circuit board interface welds detecting tool, can solve
State problem.
In order to solve the above-mentioned technical problem, the utility model is achieved using following technical scheme：
A kind of circuit board interface welds detecting tool, including body, and detection circuit, probe connection are provided with the body
Device and plug, the probe adapter and plug are respectively used to be connected with the test point of circuit under test and external interface, described
Detection circuit on one side is connected with the probe adapter, and other end is connected with the plug, and circuit under test is by some height electricity
Road plate connection composition, the test point are opened on the primary sub-circuit board of the circuit under test, and the external interface is arranged on
On the final stage sub-circuit board of the circuit under test.
Further, the detection circuit include one-channel signal detection circuit and simple two-way signal detection circuit any or
Two kinds of person.
Further, the power supply inspection for being detected to the power output end of circuit under test is additionally provided with the body
Slowdown monitoring circuit, the power sense circuit include the first light emitting diode for being in series, the anode of first light emitting diode with
The power supply terminal connection of plug, the ground terminal of negative electrode and plug connect, the power supply terminal and ground terminal of the plug respectively with it is described right
The power supply terminal and ground terminal of external tapping correspond pluggable connection.
Further, the test point includes power supply end points, is provided with the body for being supplied for the detection circuit
The DC power supply terminal of electricity, the DC power supply terminal are connected by the probe adapter with the power supply end points of the test point.
Further, the probe adapter is pogopin connectors, and the test point is correspondingly arranged on pogopin tops
Pin.
Further, the test point includes one-channel signal test side, and the one-channel signal detection circuit is pressed including first
Key switch and the second light emitting diode, the anode of second light emitting diode are connected with the DC power supply terminal, and negative electrode passes through
The probe adapter is connected with the one-channel signal test side of the test point, and described first key switch one end is inserted by described
Head is connected with the one-channel signal communication ends of the external interface, and other end is connected with ground terminal.
Further, the one-channel signal communication ends of the external interface are I/O mouths or control signal output mouth.
Further, the test point includes simple two-way signal test side, and the simple two-way signal detection circuit is pressed including second
Key switch and test serial ports, the both ends of second key switch are double with the test point respectively by the probe adapter
Road signal detection end is connected, and one end of the test serial ports is communicated by simple two-way signal of the Serial Port Line respectively with the external interface
End connection, other end are connected with test machine.
Further, the simple two-way signal communication ends of the external interface are RXD/TXD, USB, I2C one or more.
Compared with prior art, the advantages of the utility model and good effect is：Circuit board interface weldering of the present utility model
Connect detecting tool, can fast and accurately detect board to board connector, FPC, product external interface etc. with the presence or absence of rosin joint,
Even the problems such as weldering, loose contact.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantage of the present utility model
It will become clearer.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 be the utility model proposes a kind of circuit board interface welding detecting tool a kind of embodiment schematic diagram；
Fig. 2 is the equivalent circuit diagram of power sense circuit in Fig. 1；
Fig. 3 is the circuit connection diagram of power sense circuit in Fig. 1；
Fig. 4 is the circuit connection diagram of one-channel signal detection circuit in Fig. 1；
Fig. 5 is the equivalent circuit diagram of one-channel signal detection circuit in Fig. 1；
Fig. 6 is the circuit connection diagram of simple two-way signal detection circuit in Fig. 1；
Fig. 7 is the equivalent circuit diagram of simple two-way signal detection circuit in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment one, for current board to board connector, FPC, product external interface etc., by some height electricity inside it
Is connected between road plate connection composition or circuit board and external interface, after the completion of Product Assembly, between plate or plate and interface it
Between whether normal connect, typically detected at present by way of software test, but the mode method of testing of software test
Cumbersome, easily error, based on this, the present embodiment proposes a kind of circuit board interface welding detecting tool, using hardware circuit side
Formula detects connection plate, as shown in figure 1, including body 11, be provided with body 11 detect circuit, probe adapter and
Plug, probe adapter and plug are respectively used to be connected with the test point of circuit under test and external interface, detect circuit on one side
It is connected with probe adapter, other end is connected with plug, and circuit under test is made up of the connection of several sub-circuit boards, and test point is opened
It is located on the primary sub-circuit board of circuit under test, external interface is arranged on the final stage sub-circuit board of circuit under test.Detecting tool
For detect these signals after the connector of too many levels it is whether working properly, due to test point be opened in circuit under test just
On level sub-circuit board, external interface is arranged on the final stage sub-circuit board of circuit under test, and therefore, detection circuit can be by electricity to be measured
Primary sub-circuit board, final stage sub-circuit board and the circuit between primary sub-circuit board and final stage sub-circuit board on road are formed
One complete current loop, if primary sub-circuit board, final stage sub-circuit board and positioned at primary sub-circuit board and final stage son electricity
Connect intact between the plate of road, then whole current loop is unobstructed, and then can exclude the rosin joint in production process, even weld it is existing
As otherwise, then it is assumed that the problems such as rosin joint, even weldering, loose contact be present.In order to reach effective testing goal, to electricity to be measured
Road requires to increase test point in the initiating terminal of signal when drawing PCB trace.Work is tested with the external interface of the terminal complete machine in Fig. 1
Exemplified by dress, the test point drawn from mainboard CPU, application-specific integrated circuit close at pin does not have then as the test point of power supply and earth signal
It is excessive to require.The present embodiment circuit board interface welding detecting tool, can fast and accurately detect board to board connector,
The problems such as FPC, product external interface etc. weld with the presence or absence of rosin joint, even, loose contact.
As can be seen from Figure 1, mainboard PCB and daughter board PCB is connected by board to board connector and FPC inside terminal circuit under test
Connect.The signal wire path of external interface is longer, reaches daughter board PCB from mainboard PCB by FPC, then passes through external interface
Connector be connected to exterior of terminal.The external interface of terminal generally comprise power supply, I/O mouths, control signal, rs 232 serial interface signal,
The interfaces such as USB, I2C.These signals are typically from CPU, special IC chip, terminal supplying power input/output, the signal ground of system
Deng.In addition to power supply and ground, the signal wire of these external interfaces can be broadly divided into two classes, and a kind of is single signal wire, such as
I/O messages number or control signal.Another kind is the signal occurred in pairs, such as rs 232 serial interface signal（RXD、TXD）, conventional differential signal（D
+、D-）, usb signal, I2C signals etc..If can also be according to paired method of testing similar to more signals such as network interface
Handled.
Whether detecting tool is working properly after the connector of too many levels for detecting these signals, if was producing
Rosin joint, the phenomenon of even weldering in journey be present.In order to reach effective testing goal, the starting in signal is needed when drawing PCB trace
End increase test point.In Fig. 1, on mainboard, the test point drawn from mainboard CPU, application-specific integrated circuit close at pin, as power supply
Do not required excessively then with the test point of earth signal.Terminal external interface is usually socket type, therefore is selected on test fixture
The plug corresponding with interface socket is fabricated to special test cable and is connected to detecting tool.Terminal passes through survey with detecting tool
Examination cable is done to be handled altogether.For the communication shape of signal line for detecting the circuit of single signal line communications respectively and occurring in pairs
Condition, the detection circuit in the present embodiment preferably include any of one-channel signal detection circuit and simple two-way signal detection circuit or
Two kinds, specifically set it is any or two kinds at the same set according to detected circuit respectively have which communication line need to survey
Examination.
Terminal external interface typically has one or more earth signal, and power supply is divided into two kinds of input and output.For power supply
The detection of input, terminal works situation can be directly observed, be not required to individually detect.Detection for power supply output is this work
Dress needs the content detected.Principle is as shown in Figure 2 and Figure 3：It is additionally provided with body for entering to the power output end of circuit under test
The power sense circuit of row detection, power sense circuit include the first LED 1 being in series, the first light-emitting diodes
Pipe LED1 anode and the power supply terminal of plug connect, and the ground terminal of negative electrode and plug connects, the power supply terminal and ground terminal point of plug
Power supply terminal and ground terminal not with external interface correspond pluggable connection.When plug and external interface socket connection, insert
Power supply terminal and ground terminal of the power supply terminal and ground terminal of head respectively with external interface connect one to one, if the power supply of external interface
Terminal is normal, and it externally exports direct current, if the ground terminal of external interface is normal, it externally provides benchmark, therefore, its power end
Son output direct current forms current loop through the first LED 1 and ground terminal, and the first LED 1 is luminous, says
The power supply and earth signal of bright circuit-under-test are normal, and otherwise, the first LED 1 does not light, and illustrate power supply or ground connection
It is abnormal to judge connection between pcb board or weld to whether there is problem, it is necessary to further check.
The detection of circuit and simple two-way signal detection circuit is detected for one-channel signal, it is desirable to provide dc source, the direct current
Power supply can be the power supply in the self-powered of detecting tool or the circuit under test for passing through test point extraction.Such as Fig. 4 institutes
Show, it is preferred to use the mode for the power supply in circuit under test that test point is drawn.
Test point includes power supply end points, is provided with body 11 for the DC power supply terminal for detection circuit power supply, direct current
Power end is connected by probe adapter and the power supply end points of test point.When the probe adapter and circuit-under-test of test fixture
When test point connects, the power supply end points of circuit-under-test provides direct current for DC power supply terminal.
Probe adapter is preferably pogopin connectors, and corresponding test point is correspondingly arranged on pogopin thimbles, facilitates two
Person plugs connection.Certainly, pogopin connectors are not limited to, can also be the connector of other structure types easy to assemble.
As a preferred embodiment, when test point includes one-channel signal test side, namely there is single signal
When line needs test, such as I/O messages number or control signal, one-channel signal detection circuit includes the first key switch SW1 and second
LED 2, the anode of the second LED 2 are connected with DC power supply terminal, negative electrode by probe adapter with
The one-channel signal test side connection of test point, first key switch SW1 one end is led to by the one-channel signal of plug and external interface
Believe end connection, other end is connected with ground terminal.Test point in terminal close to chip or CPU pin, accordingly with chip or
CPU corresponding signal end connection, is connected by pogopin thimbles with frock.The PCB of circuit under test simultaneously（Such as mainboard）Cabling passes through
Cross the plug connection of multi-stage board connector for substrate, FPC, external interface and frock.As shown in figure 5, detect circuit etc. for one-channel signal
Circuit diagram is imitated, when key switch SW1 is closed, the second light emitting diode LDE2 is lighted, second when the first key switch SW1 unclamps
Light emitting diode LDE2 extinguishes.During above circuit design necessarily simultaneously consider I/O connections CPU or chip pin internal resistance, one
As the one-channel signal test side of test point be arranged to high-impedance state.It is preferred that the second light emitting diode LDE2 is in series with second resistance
R2, plays a part of current-limiting protection, and VDD, R2 selection will consider the pressure-resistant of chip pin, it is impossible to too high.If on circuit board
Signal has even weldering, rosin joint, loose contact, and then rule is not shown, it is necessary to investigate the corresponding problem on circuit board LED more than.
Test point includes simple two-way signal test side, namely the external interface of circuit under test has the signal needs occurred in pairs
During test, such as rs 232 serial interface signal（RXD、TXD）, conventional differential signal（D+、D-）, usb signal, I2C signals etc., such as Fig. 6, Fig. 7 institute
Show, corresponding simple two-way signal detection circuit includes the second key switch SW2 and test serial ports, and the second key switch SW2 both ends lead to
Probe adapter is crossed to be connected with the simple two-way signal test side of test point respectively, test one end of serial ports by Serial Port Line respectively with institute
The simple two-way signal communication ends connection of external interface is stated, other end is connected with test machine.
Paired signal wire originates in pcb board（Such as mainboard）Chip pin, be furnished with survey close to the position of chip pin
Pilot, this pair of signals are connected with detecting tool by pogopin thimbles.This passes through multistage to signal from terminal PC B simultaneously
Plate connector for substrate, FPC, external interface, test cable are connected to detecting tool, and from the RS232 serial ports sockets of detecting tool
Draw.Test machine is connected in the form of RXD/TXD physical connection（Such as PC）.Serial ports test software is housed on test machine.When
When the second key switch SW2 in detecting tool is closed, RXD, TXD are short-circuit, and the serial ports on computer is formed from receipts autonomous state.String
Reception window in mouth test software shows its content sent.When button unclamps, the reception window in serial ports test software
Stop display.Not more than, rule is shown, it is necessary to investigate LED if the signal on circuit board has even weldering, rosin joint, loose contact
Corresponding problem on circuit board.
Certainly, it is to be also not limited to the example above to limitation of the present utility model, the utility model that described above, which is not,
The variations, modifications, additions or substitutions that those skilled in the art are made in essential scope of the present utility model,
Also the scope of protection of the utility model should be belonged to.
Claims (9)
1. a kind of circuit board interface welds detecting tool, it is characterised in that：Including body, detection electricity is provided with the body
Road, probe adapter and plug, the probe adapter and plug are respectively used to the test point of circuit under test and to external
Mouthful connection, it is described detection circuit on one side be connected with the probe adapter, other end is connected with the plug, circuit under test by
Several sub-circuit boards connection composition, the test point are opened on the primary sub-circuit board of the circuit under test, described external
Interface is arranged on the final stage sub-circuit board of the circuit under test.
2. circuit board interface according to claim 1 welds detecting tool, it is characterised in that：The detection circuit includes single
Road signal deteching circuit and simple two-way signal detection circuit any or two kinds.
3. circuit board interface according to claim 1 welds detecting tool, it is characterised in that：It is additionally provided with the body
For the power sense circuit detected to the power output end of circuit under test, the power sense circuit includes what is be in series
First light emitting diode, the anode of first light emitting diode and the power supply terminal of plug connect, the ground terminal of negative electrode and plug
Connection, the power supply terminal and ground terminal of the plug are pluggable with power supply terminal and the ground terminal one-to-one corresponding of the external interface respectively
Connection.
4. circuit board interface according to claim 2 welds detecting tool, it is characterised in that：The test point includes power supply
End points, it is provided with the body and passes through institute for the DC power supply terminal for the detection circuit power supply, the DC power supply terminal
Probe adapter is stated to be connected with the power supply end points of the test point.
5. the circuit board interface welding detecting tool according to claim any one of 1-4, it is characterised in that：The probe connects
It is pogopin connectors to connect device, and the test point is correspondingly arranged on pogopin thimbles.
6. circuit board interface according to claim 4 welds detecting tool, it is characterised in that：The test point includes single channel
Signal detection end, the one-channel signal detection circuit include the first key switch and the second light emitting diode, and described second is luminous
The anode of diode is connected with the DC power supply terminal, and negative electrode passes through the probe adapter and the one-channel signal of the test point
Test side is connected, and described first key switch one end is connected by the one-channel signal communication ends of the plug and the external interface
Connect, other end is connected with ground terminal.
7. circuit board interface according to claim 4 welds detecting tool, it is characterised in that：The single channel of the external interface
Signal communication end is I/O mouths or control signal output mouth.
8. circuit board interface according to claim 4 welds detecting tool, it is characterised in that：The test point includes two-way
Signal detection end, the simple two-way signal detection circuit include the second key switch and test serial ports, second key switch
Both ends are connected with the simple two-way signal test side of the test point respectively by the probe adapter, one end of the test serial ports
It is connected respectively with the simple two-way signal communication ends of the external interface by Serial Port Line, other end is connected with test machine.
9. circuit board interface according to claim 8 welds detecting tool, it is characterised in that：The two-way of the external interface
Signal communication end is RXD/TXD, USB, I2C one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721195252.XU CN207181624U (en) | 2017-09-18 | 2017-09-18 | A kind of circuit board interface welds detecting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721195252.XU CN207181624U (en) | 2017-09-18 | 2017-09-18 | A kind of circuit board interface welds detecting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207181624U true CN207181624U (en) | 2018-04-03 |
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ID=61746765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721195252.XU Active CN207181624U (en) | 2017-09-18 | 2017-09-18 | A kind of circuit board interface welds detecting tool |
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| Country | Link |
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| CN (1) | CN207181624U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422252A (en) * | 2017-09-18 | 2017-12-01 | 青岛海信电子设备股份有限公司 | A kind of circuit board interface welds detecting tool |
-
2017
- 2017-09-18 CN CN201721195252.XU patent/CN207181624U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422252A (en) * | 2017-09-18 | 2017-12-01 | 青岛海信电子设备股份有限公司 | A kind of circuit board interface welds detecting tool |
| CN107422252B (en) * | 2017-09-18 | 2023-08-08 | 青岛海信电子设备股份有限公司 | Circuit board interface welding detection tool |
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