CN202372595U - Insufficient welding detector - Google Patents
Insufficient welding detector Download PDFInfo
- Publication number
- CN202372595U CN202372595U CN2011204087167U CN201120408716U CN202372595U CN 202372595 U CN202372595 U CN 202372595U CN 2011204087167 U CN2011204087167 U CN 2011204087167U CN 201120408716 U CN201120408716 U CN 201120408716U CN 202372595 U CN202372595 U CN 202372595U
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- China
- Prior art keywords
- triode
- voltage comparator
- resistance
- green led
- operational amplifier
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Abstract
An insufficient welding detector comprises a sampling amplification circuit and a distinguish display circuit, wherein a sampling resistor, an operational amplifier and a feedback resistor are included in the sampling circuit; and a voltage comparator, two resistors for setting reference voltage, a green LED, a red LED and a triode are included in the distinguish display circuit. The insufficient welding detector adopts the working principle that: under a standby state, the operational amplifier outputs up level and the voltage comparator also outputs up level, the green LED does not shine, the red LED also does not shine due to the stop of the triode, when a welding point is normal, the voltage comparator outputs low level, the green LED shines, the red LED does not shine, and in case of insufficient welding at a welding point, the voltage comparator outputs up level, the green LED does not shine, and the red LED shines due to the conducting of the triode.
Description
Affiliated technical field
The utility model relates to a kind of detector, specifically relates to a kind of rosin joint detector.
Background technology
Electronic product all will relate to welding sequence; And the quality of welding can directly influence the quality of product; Especially do not allow rosin joint, check whether rosin joint has plenty of the range estimation of dependence, have plenty of by experience; Though and the method for the dependence range estimation and the experience of leaning on is easy, the solder joint that is difficult to each rosin joint of assurance can be checked out.
Summary of the invention
The purpose of the utility model provides a kind of rosin joint detector, and it can check out the solder joint of rosin joint well, for reaching above-mentioned purpose; The technical scheme that the utility model adopted is: by a sampling amplification circuit, a differentiation display circuit is formed a rosin joint detector, in sample circuit, contains a sample resistance; An operational amplifier, two resistance that are used to feed back also contain a red test pen simultaneously; A black test pen, sample resistance one termination power, the other end are connected with the normal phase input end of red test pen and operational amplifier respectively; The black test pen is connected on the ground wire; When red test pen, when the black test pen contacts the solder joint of two UNICOMs respectively, promptly be equal to a resistance string and be connected between sample resistance and the ground wire, this its solder joint of resistance that is equal to a resistance is just often less than 1 ohm; During rosin joint greater than 1 ohm; This is equal to a formed pressure drop of resistance delivers to the in-phase input end of operational amplifier and it is amplified, the pressure drop after the amplification when the solder joint normal condition less than 0.5 volt, when solder joint rosin joint state greater than 0.5 volt; Described two resistance string that are used to feed back are connected between the output terminal and ground wire of operational amplifier, and the junction of two resistance that are used to feed back is connected with the inverting input of operational amplifier.
Contain a voltage comparator in the described differentiation display circuit; Two resistance that are used to set reference voltage, a green LED that is used to show normal condition, a red light emitting diodes that is used to show the rosin joint state; Two current-limiting resistances; Also have one when standby, to be used for the triode that the red light emitting diodes mistake is lighted simultaneously, and a resistance that is used for the triode current limliting, described two resistance string that are used to set reference voltage are connected between power supply and the ground wire; And the junction of two resistance is connected with the inverting input of voltage comparator; The junction of these two resistance promptly is a reference voltage, and the setting value of this reference voltage is 0.5 volt, and the normal phase input end of described voltage comparator is connected with the output terminal of operational amplifier; Described green LED and a current-limiting resistance are serially connected between the output terminal of power supply and voltage comparator; Described red light emitting diodes and current-limiting resistance are serially connected between the emitter of output terminal and triode of voltage comparator, the grounded collector line of triode, and the base stage of triode is connected with the normal phase input end of operational amplifier through a current-limiting resistance; Promptly also be to be connected with an end of sample resistance, described triode is a positive-negative-positive.
The principle of work of the utility model is: the red green test pen does not contact the solder joint luck to calculate that the normal phase input end of amplifier is high level and exports also is high level when holding state; The high level of this output makes the also output high level of voltage comparator, and green LED does not work, so red light emitting diodes is in high level by also not working because of the base stage of triode; The voltage of operational amplifier output is less than 0.5 volt of reference voltage when solder joint is normal; So the voltage comparator output low level, green LED is bright, and red light emitting diodes does not work; When the solder joint rosin joint: the voltage of operational amplifier output is greater than 0.5 volt reference voltage; Voltage comparator output high level, green LED does not work, so red light emitting diodes is lighted because of the base stage of triode is pulled to the low level conducting.
The beneficial effect of the utility model is: green LED is lighted solder joint and is represented normally; Red light emitting diodes is lighted the expression solder joint has rosin joint; And two light emitting diodes all do not work during standby, so as long as the state of observation light emitting diode just can have been distinguished the quality of solder joint easily.
Description of drawings
Accompanying drawing is the circuit theory diagrams of the utility model
Embodiment
To specifically narrate the technical scheme of the utility model with reference to accompanying drawing: by a sampling amplification circuit 4; A differentiation display circuit 6 is formed a rosin joint detector, in sample circuit 4, contains 3, one operational amplifiers 15 of a sample resistance; Two resistance that are used to feed back 16,17; Also contain 2, one black test pens 1 of a red test pen simultaneously, sample resistance 3 one termination power Vcc; The other end is connected with the normal phase input end of red test pen 2 with operational amplifier 15 respectively; Black test pen 1 is connected on the ground wire, and two resistance that is used to feed back 16,17 strings are by between the output terminal and ground wire of operational amplifier 15, and the junction of two resistance that are used to feed back 16,17 is connected with the inverting input of operational amplifier 15.
Contain a voltage comparator 14 in the described differentiation display circuit 6; Two 5,13, one of resistance that are used to set reference voltage are used to show that 8, one of the green LEDs of normal condition are used to show the red light emitting diodes 10 of rosin joint state; Two current- limiting resistances 7,9; Also have one when standby, to be used for the triode 11 that red light emitting diodes 10 mistakes are lighted simultaneously, and 12, two resistance of resistance 5,13 that are used for the triode current limliting are serially connected between power supply and the ground wire; And the junction of two resistance 5,13 is connected with the inverting input of voltage comparator 14; The junction of these two resistance 5,13 promptly is a reference voltage, and the setting value of this reference voltage is 0.5 volt, and the normal phase input end of voltage comparator 14 is connected with the output terminal of operational amplifier 15; Green LED 8 and current-limiting resistance 7 are serially connected between the output terminal of power Vcc and voltage comparator 14; Red light emitting diodes 10 and current-limiting resistance 9 are serially connected between the emitter of output terminal and diode 11 of voltage comparator 14, the grounded collector line of triode 11, and the base stage of triode 11 is connected with the normal phase input end of operational amplifier 15 through current-limiting resistance 12; Promptly also be to be connected with an end of sample resistance 3, triode 11 is positive-negative-positives.
Claims (2)
1. a rosin joint detector is by a sampling amplification circuit (4); A differentiation display circuit (6) is formed; It is characterized in that: contain a voltage comparator (14) in the described differentiation display circuit (6); Two resistance (5), (13) that are used to set reference voltage; A green LED (8) that is used to show normal condition, a red light emitting diodes (10) that is used to show the rosin joint state also has one simultaneously and when standby, is used for the triode (11) that red light emitting diodes (10) is lighted; Green LED (8) and current-limiting resistance (7) are serially connected between the output terminal of power Vcc and voltage comparator (14); Red light emitting diodes (10) and current-limiting resistance (9) are serially connected between the emitter of output terminal and triode (11) of voltage comparator (14), the grounded collector line of triode (11), and the base stage of triode (11) is connected with the normal phase input end of operational amplifier (15) through current-limiting resistance (12).
2. rosin joint detector according to claim 1 is characterized in that: triode (11) is a positive-negative-positive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204087167U CN202372595U (en) | 2011-10-21 | 2011-10-21 | Insufficient welding detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204087167U CN202372595U (en) | 2011-10-21 | 2011-10-21 | Insufficient welding detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202372595U true CN202372595U (en) | 2012-08-08 |
Family
ID=46596292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204087167U Expired - Fee Related CN202372595U (en) | 2011-10-21 | 2011-10-21 | Insufficient welding detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202372595U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499758A (en) * | 2013-08-21 | 2014-01-08 | 深圳市晶导电子有限公司 | Audion cold solder joint judgment method and device thereof |
| CN104407283A (en) * | 2014-12-10 | 2015-03-11 | 上海亚虹模具股份有限公司 | Device and method for automatically detecting hidden damage of circuit board |
| CN106291211A (en) * | 2015-06-01 | 2017-01-04 | 神讯电脑(昆山)有限公司 | Power-supply adapter test circuit |
| CN109444635A (en) * | 2018-11-15 | 2019-03-08 | 珠海格力电器股份有限公司 | A kind of equipment ground real time monitoring apparatus |
| CN115308646A (en) * | 2022-08-30 | 2022-11-08 | 苏州浪潮智能科技有限公司 | Rosin joint detection device |
-
2011
- 2011-10-21 CN CN2011204087167U patent/CN202372595U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499758A (en) * | 2013-08-21 | 2014-01-08 | 深圳市晶导电子有限公司 | Audion cold solder joint judgment method and device thereof |
| CN104407283A (en) * | 2014-12-10 | 2015-03-11 | 上海亚虹模具股份有限公司 | Device and method for automatically detecting hidden damage of circuit board |
| CN106291211A (en) * | 2015-06-01 | 2017-01-04 | 神讯电脑(昆山)有限公司 | Power-supply adapter test circuit |
| CN106291211B (en) * | 2015-06-01 | 2018-06-22 | 神讯电脑(昆山)有限公司 | Power-supply adapter test circuit |
| CN109444635A (en) * | 2018-11-15 | 2019-03-08 | 珠海格力电器股份有限公司 | A kind of equipment ground real time monitoring apparatus |
| CN115308646A (en) * | 2022-08-30 | 2022-11-08 | 苏州浪潮智能科技有限公司 | Rosin joint detection device |
| CN115308646B (en) * | 2022-08-30 | 2024-01-19 | 苏州浪潮智能科技有限公司 | Virtual welding detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20131021 |