CN207992362U - Detection circuit - Google Patents
Detection circuit Download PDFInfo
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- CN207992362U CN207992362U CN201820340151.5U CN201820340151U CN207992362U CN 207992362 U CN207992362 U CN 207992362U CN 201820340151 U CN201820340151 U CN 201820340151U CN 207992362 U CN207992362 U CN 207992362U
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- circuit
- triode
- detection circuit
- coil
- connect
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- 238000001514 detection method Methods 0.000 title claims abstract description 44
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 238000007689 inspection Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011179 visual inspection Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model provides a detection circuit, which is used for detecting whether the triode in the time sequence control circuit board card has tin connection or not, and comprises a voltage division circuit, a switch circuit, a relay and a signal transmitter; one end of the voltage division circuit is connected with a pin to be detected of the triode, and the other end of the voltage division circuit is connected with one end of the switch circuit; the other end of the switch circuit is connected with the relay, the relay comprises a coil and a rotary switch, one end of the coil is connected with the switch circuit, the other end of the coil is connected with a power supply, and the rotary switch is connected with the signal transmitter in series through a live wire. Above-mentioned detection circuitry, when the triode wait to detect the voltage of pin department and be greater than the maximum voltage that divider resistance set for, switching circuit switches on, and then the power supplies power for the coil, and the coil produces magnetic force and is connected with the rotation switch, and then makes signal transmitter not circular telegram, when signal transmitter does not circular telegram, then shows that the triode has the tin phenomenon even, reaches the purpose that whether automated inspection triode has the tin phenomenon even, has improved detection efficiency.
Description
Technical field
The utility model is related to electronic technology field, more particularly to a kind of detection circuit.
Background technology
In the electronic device, all include that there are one the power supplies of the function module in power supply electron equipment, due to electronic equipment
In function module it is numerous, and each function module may need work normally by certain logical order startup, therefore electric
Source is also required to power to corresponding function module by certain logical order, therefore in the electronic equipment containing numerous function modules
In, it is frequently provided with a sequential control circuit, to control the sequence that power supply powers to function module.
Each component is welded in a circuit board by existing sequential control circuit, the side that can be generally encapsulated with plug-in unit
Formula connects several triodes, and carries out scolding tin to the pin of several triodes automatically by mechanical arm, during scolding tin, such as
Being folded to for two pins of triode is consistent, usually will appear the case where connecting tin, where the collector and emitter for making triode
Pin connection, cause sequential control circuit unqualified；Therefore, it after completing to the encapsulation of sequential control circuit, needs to pass through
Detect the case where sequential control circuit is with the presence or absence of even tin.
Existing detection sequential control circuit is examined operating personnel in a manner of visual inspection with the presence or absence of the mode of even tin
It surveys, detection efficiency is low, increases production cost.
Utility model content
Based on this, the purpose of this utility model is to provide a kind of detection circuit, with solve in the prior art operating personnel with
The mode of visual inspection detects sequential control circuit with the presence or absence of the low problem of detection efficiency caused by even tin.
The utility model provides a kind of detection circuit, and whether the triode for detecting in sequential control circuit board is deposited
In even tin, the detection circuit includes bleeder circuit, switching circuit, relay and signal projector；The bleeder circuit one
End is connect with the pin to be detected of the triode, and the other end is connect with the switching circuit, when the bleeder circuit receives institute
When stating the high level signal of triode, and generates a Continuity signal and be sent to the switching circuit；The switching circuit other end
It is connect with the relay, while the switching circuit is grounded, the switching circuit receives the Continuity signal and is connected；It is described
Relay includes coil and rotating switch, and described coil one end is connect with the switching circuit, and the other end is connect with a power supply, institute
It states rotating switch to connect with the signal projector by a firewire, after the switching circuit conducting, the power supply exports a work
Make voltage to the coil, the coil, which obtains the operating voltage generation magnetic force, makes the rotating switch rotate, the rotation
Switch rotates so that the signal projector powers off.
Compared to the prior art, above-mentioned detection circuit, the voltage at the pin to be detected of triode are more than divider resistance
When the maximum voltage of setting, switching circuit conducting, and then power supply, to coil power supply, coil generates magnetic force and is connect with rotating switch,
And then make signal projector no power, when signal projector no power, then it represents that triode has even tin phenomenon and to sum up reaches
To automatic detection transistor with the presence or absence of the purpose of even tin phenomenon, detection efficiency is improved.
Further, the switching circuit includes a switching transistor, the base stage of the switching transistor and the partial pressure
Circuit connects, and the collector of the switching transistor is connect with the relay, the emitter ground connection of the switching transistor.
Further, the bleeder circuit includes the first resistor and second resistance being sequentially connected in series, the switching transistor
Base stage be connected between the first resistor and the second resistance, described first resistor one end is to be checked with the triode
Pin connection is surveyed, the other end of the second resistance is connect with the emitter of the switching transistor.
Further, the side of the bleeder circuit is also parallel with a capacitance.
Further, the capacitance is in parallel with the second resistance.
Further, the detection circuit further includes a diode, and the diode is in parallel with the relay.
Further, one end that the first resistor is connect with the triode is equipped with a probe.
Further, the signal projector is connect with a controller.
Further, the signal projector is connected with the first light emitting diode.
Further, the coil is also connected with the second light emitting diode.
Description of the drawings
Fig. 1 is the structural schematic diagram of detection circuit in the utility model first embodiment；
Fig. 2 is the structural schematic diagram of the sequential control circuit in Fig. 1；
Fig. 3 is the structural schematic diagram of the detection circuit in the utility model the utility model second embodiment.
Main element symbol description
| Bleeder circuit | 10 | Relay | 30 | Second light emitting diode | 43 |
| First resistor | 11 | Coil | 31 | Power supply | 50 |
| Second resistance | 12 | Rotating switch | 32 | Sequential control circuit board | 100 |
| Capacitance | 13 | Diode | 33 | Triode | 101 |
| Probe | 14 | Signal projector | 40 | Controller | 200 |
| Switching circuit | 20 | Firewire | 41 | ||
| Switching transistor | 21 | First light emitting diode | 42 |
Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.Several embodiments of the utility model are given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiment described herein.Make to the utility model on the contrary, purpose of providing these embodiments is
Disclosure is more thorough and comprehensive.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more relevant Listed Items.
It please refers to Fig.1 and Fig. 2, the detection circuit that the utility model first embodiment provides is electric for detecting timing control
For triode 101 (please referring to Fig. 2) in road board 100 with the presence or absence of even tin, the detection circuit includes bleeder circuit 10, switch
Circuit 20, relay 30 and signal projector 40, specifically, in the present embodiment, the signal projector 40 is a socket；
Specifically, in the present embodiment, 10 one end of the bleeder circuit is connect with the pin of the triode 101, another
End is connect with the switching circuit 20, when the bleeder circuit 10 receives the high level signal of the triode 101, the partial pressure
Circuit 10 is connected and the high level signal is sent to the switching circuit 20, when the bleeder circuit 10 receives three pole
When the low level signal of pipe 101, the bleeder circuit 10 is not turned on, and the switching circuit 20 is also not turned on, the relay 30
Middle no current, the signal projector 40 obtain electric work on.
20 other end of the switching circuit is connect with the relay 30, while the switching circuit 20 is grounded, described to open
Powered-down road 20 receives the Continuity signal and is connected；The relay 30 includes coil 31 and rotating switch 32, the coil 31
One end is connect with the switching circuit 20, and the other end is connect with a power supply 50, and the rotating switch 32 passes through a firewire 41 and institute
The series connection of signal projector 40 is stated, after the switching circuit 20 is connected, one operating voltage of output of the power supply 50 to the coil 31,
The coil 31, which obtains the operating voltage and generates magnetic force, makes the rotating switch 32 rotate, the rotating switch rotation 32 so that
The signal projector 40 powers off.
Above-mentioned detection circuit, when the voltage at the pin of triode 101 is more than the maximum voltage of divider resistance setting, i.e.,
There is even tin phenomenon in the emitter and collector of triode 101, switching circuit 20 is connected, and then power supply 50 is powered to coil 31,
Coil 31 generates magnetic force and is connect with rotating switch 32, and then makes 50 no power of signal projector, when 50 no power of signal projector
When, then it represents that there is even tin phenomenon in triode 101, it is possible to understand that, the signal projector 50 can connect with a display element
It connects, such as light emitting diode, to show whether the signal projector is powered, the signal projector 50 can also be with a controller
200 connections, the controller 200 can be such as PLC controller equipment, be sent out with to monitor the signal projector 50 in real time
Signal and data to sum up achieve the purpose that automatic detection transistor with the presence or absence of even tin phenomenon, improves detection efficiency.
Specifically, in the present embodiment, the switching circuit 20 includes but not limited to a switching transistor 21, the switch
The base stage of triode 21 is connect with the bleeder circuit, and the collector of the switching transistor 21 is connect with the relay, institute
State the emitter ground connection of switching transistor 21.
Specifically, in the present embodiment, the bleeder circuit 10 includes but not limited to 11 He of first resistor being sequentially connected in series
The base stage of second resistance 12, the switching transistor 21 is connected between the first resistor 11 and the second resistance 12, institute
It states 11 one end of first resistor to connect with the pin of the triode 101, the other end of the second resistance 12 and the switch three
The emitter of pole pipe 21 connects, it is possible to understand that, the voltage value of the first resistor 11 and second resistance 12 can be according to switch
The turn-on voltage that triode 21 is set is set, and is provided just to the detection circuit when specifically connecting tin with triode 101
Voltage can be such that the switching diode 21 is connected after the partial pressure of the bleeder circuit 10.
Specifically, in the present embodiment, increasing above-mentioned detection circuit, Ke Yili on the jig of factory testing stand-by power consumption
Solution, the signal projector 40 can be connect with a controller 200, and the controller 200 for controlling according to testing result
Sequential control circuit board 100 described in jig input and output.Because it is standby when the sequential control circuit board 100 (such as Fig. 2 institutes
Show) in the signals of D points be low level, QC1 is not turned on, A the and C voltage across poles of triode 101 is caused to be less than its cut-in voltage value,
A feet voltage is low level at this time, and even tin detection test points are located at A points, and the voltage of A points is less than the conducting of switching transistor 21
Setting value, switching transistor 21 are not turned on, and rotating switch 32 is failure to actuate, and signal projector 40 tends to remain on, timing control
Circuit-board card 100 exports normally.And when even tin situation occurs for triode 101, A foot voltages become high level, that is, connect tin detection
Point is high level, and the bleeder circuit that A point voltage appropriate mixs first resistor 11 is formed with second resistance 12 makes three pole of switch enough
Pipe 21 is connected, and rotating switch 32 is made to act, and to make signal projector 40 open a way, makes sequential control circuit board 100 without output,
To detect that triode 101 has even tin situation.
Referring to Fig. 3, the detection circuit that the utility model second embodiment provides, the second embodiment and described first
Embodiment is more or less the same, and difference lies in the second embodiment, the side of the bleeder circuit 10 is also parallel with a capacitance
13, the capacitance 13 is in parallel with the second resistance 12.Specifically, the capacitance 13 can be filter capacitor, the capacitance 13
The detection voltage transmitted for stablizing the bleeder circuit 10, keeps test result more acurrate, meanwhile, according to the characteristic of capacitance and
Connection type, the capacitance 13 may also function as the effect of delay.
In the present embodiment, the detection circuit further includes a diode 33, the diode 33 and the relay 31
It is in parallel, it is possible to understand that, according to the characteristic of diode it is found that the diode 33 is for protecting the relay 31, specifically,
The diode 33 is zener diode, it is possible to understand that, relay 31 needs constantly to be powered and break during detection
Electricity, and will produce transient voltage during energization and power-off, instantaneous voltage value is larger, is easy to damage relay 31, institute
Pole pipe 33 is arranged, to stablize instantaneous voltage, the effect of protective relay 31 is played.
In the other embodiment of the utility model, one end that the first resistor 11 is connect with the triode 101 is set
There is a probe 14, by the way that the probe 14 is arranged, detection circuit is made to have convenient for the bleeder circuit 10 and the triode 101
Test point connection effect.
Specifically, in the present embodiment, in order to intuitively know that testing result, the signal projector 40 and first shine
Diode 42 is connected, and the coil 31 is also connected with the second light emitting diode 43, described when the signal projector 40 is powered
First light emitting diode 42 is bright, and when the relay 30 is powered, second light emitting diode 43 is bright, specifically, in this reality
With in novel one embodiment, the luminescent color of the first light emitting diode 42 and the second light emitting diode 43 can be set as not
Same color.
For example, first light emitting diode 42 is green, the second light emitting diode is red, when testing result is qualification
When, signal projector is powered, green light, and when being detected as unqualified, when red is easy to be conceivable, in the utility model
In other embodiment, can also connect an alarm element at the relay 31, and the alarm element includes but not limited to bee
Ring the element with prompt functions such as device, loudspeaker, flash lamp, to prompt operating personnel to detect the presence of the sequential control of even tin
Circuit-board card 100 processed, with timely processing.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of detection circuit, for detecting the triode in sequential control circuit board with the presence or absence of even tin, which is characterized in that
The detection circuit includes bleeder circuit, switching circuit, relay and signal projector；
Described bleeder circuit one end is connect with the pin to be detected of the triode, and one end of the other end and the switching circuit connects
It connects, when the bleeder circuit receives the high level signal of the triode, generates a Continuity signal and be sent to the switch electricity
Road；
The other end of the switching circuit is connect with the relay, and the switching circuit receives the Continuity signal and is connected；
The relay includes coil and rotating switch, and described coil one end is connect with the switching circuit, the other end and an electricity
Source connects, and the rotating switch is connected by a firewire with the signal projector, after the switching circuit conducting, the power supply
An operating voltage is exported to the coil, the coil, which obtains the operating voltage generation magnetic force, makes the rotating switch rotate,
The rotating switch rotates so that the signal projector powers off.
2. detection circuit according to claim 1, which is characterized in that the switching circuit includes a switching transistor, institute
The base stage for stating switching transistor is connect with the bleeder circuit, and the collector of the switching transistor is connect with the relay,
The emitter of the switching transistor is grounded.
3. detection circuit according to claim 2, which is characterized in that the bleeder circuit includes the first electricity being sequentially connected in series
Resistance and second resistance, the base stage of the switching transistor are connected between the first resistor and the second resistance, and described the
One resistance one end is connect with the pin to be detected of the triode, the other end of the second resistance and the switching transistor
Emitter connects.
4. detection circuit according to claim 3, which is characterized in that the side of the bleeder circuit is also parallel with an electricity
Hold.
5. detection circuit according to claim 4, which is characterized in that the capacitance is in parallel with the second resistance.
6. detection circuit according to claim 1, which is characterized in that the detection circuit further includes a diode, described
Diode is in parallel with the relay.
7. detection circuit according to claim 3, which is characterized in that the first resistor connect with the triode one
End is equipped with a probe.
8. detection circuit according to claim 1, which is characterized in that the signal projector is connect with a controller.
9. detection circuit according to claim 1, which is characterized in that the signal projector and the first light emitting diode string
Connection.
10. detection circuit according to claim 1, which is characterized in that the coil is also connected with the second light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820340151.5U CN207992362U (en) | 2018-03-12 | 2018-03-12 | Detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820340151.5U CN207992362U (en) | 2018-03-12 | 2018-03-12 | Detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207992362U true CN207992362U (en) | 2018-10-19 |
Family
ID=63826747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820340151.5U Active CN207992362U (en) | 2018-03-12 | 2018-03-12 | Detection circuit |
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| Country | Link |
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| CN (1) | CN207992362U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272818A (en) * | 2020-03-02 | 2020-06-12 | 深圳市金锐显数码科技有限公司 | Circuit board soldering tin detection method and device |
| CN112345982A (en) * | 2020-09-29 | 2021-02-09 | 歌尔科技有限公司 | Method and device for detecting welding condition of circuit element |
| CN113687221A (en) * | 2021-08-12 | 2021-11-23 | 中航油青岛国际机场航空油料有限责任公司 | Small-size relay automatic checkout device |
-
2018
- 2018-03-12 CN CN201820340151.5U patent/CN207992362U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272818A (en) * | 2020-03-02 | 2020-06-12 | 深圳市金锐显数码科技有限公司 | Circuit board soldering tin detection method and device |
| CN111272818B (en) * | 2020-03-02 | 2022-12-02 | 深圳市金锐显数码科技有限公司 | Circuit board soldering tin detection method and device |
| CN112345982A (en) * | 2020-09-29 | 2021-02-09 | 歌尔科技有限公司 | Method and device for detecting welding condition of circuit element |
| CN112345982B (en) * | 2020-09-29 | 2023-05-26 | 歌尔科技有限公司 | Circuit element welding condition detection method and device |
| CN113687221A (en) * | 2021-08-12 | 2021-11-23 | 中航油青岛国际机场航空油料有限责任公司 | Small-size relay automatic checkout device |
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