CN204241606U - Detection module and pick-up unit - Google Patents
Detection module and pick-up unit Download PDFInfo
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- CN204241606U CN204241606U CN201420631433.2U CN201420631433U CN204241606U CN 204241606 U CN204241606 U CN 204241606U CN 201420631433 U CN201420631433 U CN 201420631433U CN 204241606 U CN204241606 U CN 204241606U
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Abstract
The utility model relates to a kind of detection module and pick-up unit, and wherein, detection module comprises: signal generating circuit, for exporting the waveform signal of assigned frequency to circuit-under-test; Undesired signal filtering circuit, is connected with circuit-under-test, for filtering undesired signal; Waveform detection circuit, for judging the waveform signal whether having assigned frequency in the signal after filtering; Circuit resistance critical point Circuit tuning, for comparing the reference voltage of the signal after filtration and setting; And result output circuit, carry out output detections result according to the signal that waveform detection circuit and circuit resistance critical point Circuit tuning export.In the detection module provided at the utility model and pick-up unit, the undesired signal produced because circuit-under-test system is charged is eliminated by undesired signal filtering circuit, and utilize waveform detection circuit and circuit resistance critical point Circuit tuning measure detection signal and judge respectively, therefore also can the break-make of Measurement accuracy circuit when system is charged.
Description
Technical field
The utility model relates to electric detection technique field, particularly a kind of detection module and pick-up unit.
Background technology
At present, the break-make of circuit mainly utilizes multimeter to carry out detecting, and namely utilizes the power supply of multimeter inside and comparison resistance to measure test line or element.Utilize the break-make of multimeter testing circuit generally to have two kinds of modes: a kind of is in system cut-off situation, utilize multimeter to measure the voltage of test line or element, electric current or resistance, judge whether are test line or element break-make according to the voltage recorded, electric current or resistance; Another kind is in the charged situation of system, rely on the voltage gear of multimeter to measure the voltage drop at test line or element two ends, whether judges the break-make of test line or element according to the voltage drop recorded.
When adopting multimeter to detect, part main equipment must detect under power-off environment, such as high temperature furnace.Although the measurement result under power-off environment is relatively more accurate, switching on and shutting down are measured and are not only spent a large amount of time frequently, have a strong impact on the mobility of equipment, and power-off can cause electronic devices and components to damage, and increase the risk of device damage.And carry out measuring under conductive environment because multimeter can not filter various undesired signal effectively, therefore cannot ensure the accuracy of measurement result.
Base this, the how break-make of a metering circuit technical matters having become those skilled in the art urgently to be resolved hurrily exactly in the charged situation of system.
Utility model content
The purpose of this utility model is to provide a kind of detection module and pick-up unit, cannot obtain Measurement accuracy with the break-make solving circuit in prior art in the charged situation of system, and must carry out the problem that detects under system cut-off environment.
For solving the problem, the utility model provides a kind of detection module, and for the break-make of testing circuit, described detection module comprises:
Signal generating circuit, for exporting the waveform signal of assigned frequency to circuit-under-test;
Undesired signal filtering circuit, is connected with circuit-under-test, for filtering undesired signal;
Waveform detection circuit, for judging the waveform signal whether having assigned frequency in the signal after filtering;
Circuit resistance critical point Circuit tuning, for comparing the reference voltage of the signal after filtration and setting; And
Result output circuit, carrys out output detections result according to the signal that described waveform detection circuit and circuit resistance critical point Circuit tuning export.
Optionally, circuit-under-test is connected between the input end of described signal generating circuit and described undesired signal filtering circuit, the output terminal of described undesired signal filtering circuit is connected with the input end of described waveform detection circuit and the input end of circuit resistance critical point Circuit tuning respectively, the output terminal of described waveform detection circuit is connected with an input end of described result output circuit, and the output terminal of described circuit resistance critical point Circuit tuning is connected with another input end of described result output circuit.
Optionally, in described detection module, described signal generating circuit comprises power supply and waveform generator, and described waveform generator is connected with described power supply.
Optionally, in described detection module, described undesired signal filtering circuit comprises diode group and the capacitance group of series connection mutually, and described diode group is for filtering DC influence signal, and described capacitance group is for filtering the AC signal outside assigned frequency.
Optionally, in described detection module, described waveform detection circuit comprises band energising appearance, time delay shift capacitor, resistance and NOR gate circuit, and described time delay shift capacitor and resistor coupled in parallel hold between NOR gate circuit in described band energising.
Optionally, in described detection module, described circuit resistance critical point Circuit tuning comprises slide rheostat and voltage comparator, described slide rheostat is connected with described voltage comparator, described slide rheostat is for adjusting the reference voltage of described voltage comparator, described voltage comparator receives the trap signal of described undesired signal filtering circuit output and described trap signal and reference voltage is compared, and exports comparative result.
Optionally, in described detection module, described result output circuit comprises AND circuit and display unit, the input end of described AND circuit is connected with the output terminal of described NOR gate circuit and the output terminal of described voltage comparator respectively, the signal that described AND circuit exports according to described voltage comparator and the signal that NOR gate circuit exports carry out output detections result, described display unit is connected with described AND circuit, for described testing result being shown with the form of acoustic intelligence and/or optical information.
Optionally, in described detection module, described reference voltage is the critical voltage of decision circuitry break-make.
The utility model additionally provides a kind of pick-up unit, and described pick-up unit comprises detection module as above.
Optionally, in described pick-up unit, described pick-up unit is multimeter, and described multimeter comprises several detection modules, and the assigned frequency of the waveform signal that each detection module provides is all not identical.
In sum, in the detection module provided at the utility model and pick-up unit, the undesired signal produced because circuit-under-test system is charged is eliminated by undesired signal filtering circuit, and utilize waveform detection circuit and circuit resistance critical point Circuit tuning measure detection signal and judge respectively, therefore also can the break-make of Measurement accuracy circuit-under-test when system is charged.
Accompanying drawing explanation
Fig. 1 is the structural representation of the detection module of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the detection module that the utility model proposes and pick-up unit are described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, aid illustration the utility model embodiment lucidly.
Please refer to Fig. 1, it is the structural representation of the detection module of the utility model embodiment.As shown in Figure 1, described detection module 100 is for the break-make of testing circuit, and described detection module 100 comprises: signal generating circuit 10, for exporting the waveform signal of assigned frequency to circuit-under-test 200; Undesired signal filtering circuit 20, is connected with described circuit-under-test 200, for filtering undesired signal; Waveform detection circuit 30, for judging the waveform signal whether having assigned frequency in the signal after filtering; Circuit resistance critical point Circuit tuning 40, for comparing the reference voltage of the signal after filtration and setting; And result output circuit 50, carry out output detections result according to the signal that described waveform detection circuit 30 and circuit resistance critical point Circuit tuning 40 export.
Wherein, circuit-under-test 200 is connected between the input end of described signal generating circuit 10 and described undesired signal filtering circuit 20, the output terminal of described undesired signal filtering circuit 20 is connected with the input end of described waveform detection circuit 30 and the input end of circuit resistance critical point Circuit tuning 40 respectively, the output terminal of described waveform detection circuit 30 is connected with an input end of described result output circuit 50, and the output terminal of described circuit resistance critical point Circuit tuning 40 is connected with another input end of described result output circuit 50.
Concrete, as shown in Figure 1, one end of described circuit-under-test 200 is connected with the output terminal of described signal generating circuit 10, the other end of described circuit-under-test 200 is connected with the input end of described undesired signal filtering circuit 20, described signal generating circuit 10 comprises power supply and waveform generator 11, described waveform generator 11 is connected with described power supply, for generation of assigned frequency f waveform signal and export described circuit-under-test 200 to, described undesired signal filtering circuit 20 comprises diode group (D1 and D2) and the capacitance group (C1 and C2) of series connection mutually, described diode group (D1 and D2) is for filtering DC influence signal, described capacitance group (C1 and C2) is for filtering the AC signal outside assigned frequency.
Wherein, described circuit-under-test 200 can be charged, also can not be charged.Even if described circuit-under-test 200 exists undesired signal because system is charged, described undesired signal filtering circuit 20 can filter described undesired signal, thus eliminates the impact of described undesired signal on testing result.
The output terminal of described undesired signal filtering circuit 20 is connected with the input end of described circuit resistance critical point Circuit tuning 40 with the input end of described waveform detection circuit 30 respectively, trap signal is exported to described waveform detection circuit 30 and described circuit resistance critical point Circuit tuning 40 by described undesired signal filtering circuit 20 respectively, and described waveform detection circuit 30 receiving filtration signal also judges the waveform signal whether having assigned frequency in the signal after filtering.
Please continue to refer to Fig. 1, described waveform detection circuit 30 comprises band energising and holds C3, time delay shift capacitor C4, resistance R and NOR gate circuit 31, described time delay shift capacitor C4 and resistance R is parallel to the energising of described band and holds between C3 and NOR gate circuit 31, and described NOR gate circuit 31 judges according to the signal received the waveform signal whether having assigned frequency f in the trap signal that described undesired signal filtering circuit 20 exports.
Please continue to refer to Fig. 1, described circuit resistance critical point Circuit tuning 40 comprises slide rheostat R1 and voltage comparator 41, described slide rheostat R1 is connected with described voltage comparator 41, described slide rheostat R1 is for adjusting the reference voltage of described voltage comparator 41, described voltage comparator 41 receives the trap signal of described undesired signal filtering circuit 20 output and itself and described reference voltage is compared, thus exports comparative result.
Wherein, described reference voltage is the critical voltage of decision circuitry break-make, if exceed described reference voltage, thinks that described circuit-under-test 200 is open circuits, if do not exceed described reference voltage, thinks that described circuit-under-test 200 is paths.Because waveform signal can produce different pressure drops along with the difference of described circuit-under-test 200 resistance via after circuit-under-test 200, therefore need the reference voltage being adjusted voltage comparator 41 by slide rheostat R1.
Please continue to refer to Fig. 1, described result output circuit 50 comprises AND circuit 51 and display unit (not shown), the input end of described AND circuit 51 is connected with the output terminal of described NOR gate circuit 31 and the output terminal of described voltage comparator 41 respectively, the signal that described AND circuit 51 exports according to described voltage comparator 41 and the signal that NOR gate circuit 31 exports carry out output detections result, described display unit is connected with described AND circuit 51, for described testing result being shown with the form of acoustic intelligence and/or optical information.
In the present embodiment, described signal generating circuit 10 and undesired signal filtering circuit 20 are connected to the two ends of circuit-under-test 200, described signal generating circuit 10 is for exporting the waveform signal of assigned frequency to circuit-under-test 200, described undesired signal filtering circuit 20 is for filtering undesired signal, described waveform detection circuit 30 is all connected with the output terminal of described undesired signal filtering circuit 20 with the input end of circuit resistance critical point Circuit tuning 40, the output terminal of described waveform detection circuit 30 is connected with an input end of described result output circuit 50, the output terminal of described circuit resistance critical point Circuit tuning 40 is connected with another input end of described result output circuit 50, whether described waveform detection circuit 30 has the waveform signal of assigned frequency in the signal after filtering for judging and exports described result output circuit 50 to, described circuit resistance critical point Circuit tuning 40 is for comparing the reference voltage of the signal after filtration and setting and result exported to described result output circuit 50, the signal that described result output circuit 50 exports according to described waveform detection circuit 30 and circuit resistance critical point Circuit tuning 40 carrys out output detections result.
Wherein, described signal generator 11 is to the square wave of the waveform signal that circuit-under-test 200 exports to be frequency f be 50Hz.In actual applications, the frequency of waveform signal and shape can be selected according to actual conditions, and described waveform signal can be frequency is the triangular wave of 60Hz, the sine wave of 80Hz etc., does not limit at this.
As shown in Figure 1, the square wave that described signal generator 11 exports by after circuit-under-test successively through the diode D1 of undesired signal filtering circuit 20, diode D2, electric capacity C1 and electric capacity C2, first filter out direct current signal by diode (D1 and D2), afterwards via electric capacity C1 filters out high frequency signals, again via electric capacity C2 filter out low frequency signal, two-way is divided into after arriving Node B, wherein a road transfers to the input end of voltage comparator 41, transfer to two input ends of NOR gate circuit 31 respectively by resistance R and time delay shift capacitor C4 after another road holds C3 via band energising, the output signal of described NOR gate circuit 31 and the output signal of voltage comparator 41 are as two input signals of described AND circuit 51, the break-make of described AND circuit 51 circuit-under-test 200 according to these two input-signal judging.
When the input signal of described AND circuit 51 is high level entirely, it exports high level, now judges that described circuit-under-test 200 is as path.When of described AND circuit 51 is input as low level or two inputs are low level, its output low level, now judges that described circuit-under-test 200 is as open circuit.
In the present embodiment, by square-wave signal is inputted circuit-under-test 200, and whether detection has the magnitude of voltage of square-wave signal and square-wave signal after undesired signal is filtered, thus judges the break-make of circuit-under-test 200.Therefore, the break-make of circuit can be implemented in line (charged) and detects, and then improves equipment mobility, and avoids the equipment failure that causes because of power-off.
The utility model additionally provides a kind of pick-up unit, and described pick-up unit comprises detection module 100 as above.
In the present embodiment, described pick-up unit is multimeter, and described multimeter comprises at least one detection module 100.Described multimeter can filter various undesired signal effectively, also can the break-make of metering circuit exactly in the charged situation of system.
Preferably, described multimeter comprises several detection modules 100, and the assigned frequency f of the waveform signal that each detection module 100 provides is all not identical.The break-make of the waveform signal difference metering circuit utilizing assigned frequency different, the measurement result of collecting each detection module 100 carries out comprehensive descision, more accurately can obtain testing result.
To sum up, in the detecting unit provided in the utility model embodiment and pick-up unit, the undesired signal produced because circuit-under-test system is charged is eliminated by undesired signal filtering circuit, and utilize waveform detection circuit and circuit resistance critical point Circuit tuning measure detection signal and judge respectively, therefore also can the break-make of metering circuit exactly in the charged situation of system.
Foregoing description is only the description to the utility model preferred embodiment; any restriction not to the utility model scope; any change that the those of ordinary skill in the utility model field does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (10)
1. a detection module, is characterized in that, comprising:
Signal generating circuit, for exporting the waveform signal of assigned frequency to circuit-under-test;
Undesired signal filtering circuit, is connected with circuit-under-test, for filtering undesired signal;
Waveform detection circuit, for judging the waveform signal whether having assigned frequency in the signal after filtering;
Circuit resistance critical point Circuit tuning, for comparing the reference voltage of the signal after filtration and setting; And
Result output circuit, carrys out output detections result according to the signal that described waveform detection circuit and circuit resistance critical point Circuit tuning export.
2. detection module as claimed in claim 1, it is characterized in that, circuit-under-test is connected between the input end of described signal generating circuit and described undesired signal filtering circuit, the output terminal of described undesired signal filtering circuit is connected with the input end of described waveform detection circuit and the input end of circuit resistance critical point Circuit tuning respectively, the output terminal of described waveform detection circuit is connected with an input end of described result output circuit, and the output terminal of described circuit resistance critical point Circuit tuning is connected with another input end of described result output circuit.
3. detection module as claimed in claim 1, it is characterized in that, described signal generating circuit comprises power supply and waveform generator, and described waveform generator is connected with described power supply.
4. detection module as claimed in claim 1, it is characterized in that, described undesired signal filtering circuit comprises diode group and the capacitance group of series connection mutually, and described diode group is for filtering DC influence signal, and described capacitance group is for filtering the AC signal outside assigned frequency.
5. detection module as claimed in claim 1, is characterized in that, described waveform detection circuit comprises band energising appearance, time delay shift capacitor, resistance and NOR gate circuit, and described time delay shift capacitor and resistor coupled in parallel hold between NOR gate circuit in described band energising.
6. detection module as claimed in claim 5, it is characterized in that, described circuit resistance critical point Circuit tuning comprises slide rheostat and voltage comparator, described slide rheostat is connected with described voltage comparator, described slide rheostat is for adjusting the reference voltage of described voltage comparator, described voltage comparator receives the trap signal of described undesired signal filtering circuit output and described trap signal and reference voltage is compared, and exports comparative result.
7. detection module as claimed in claim 6, it is characterized in that, described result output circuit comprises AND circuit and display unit, the input end of described AND circuit is connected with the output terminal of described NOR gate circuit and the output terminal of described voltage comparator respectively, the signal that described AND circuit exports according to described voltage comparator and the signal that NOR gate circuit exports carry out output detections result, described display unit is connected with described AND circuit, for described testing result being shown with the form of acoustic intelligence and/or optical information.
8. detection module as claimed in claim 1, it is characterized in that, described reference voltage is the critical voltage of decision circuitry break-make.
9. a pick-up unit, is characterized in that, comprises detection module as claimed in any of claims 1 to 8 in one of claims.
10. pick-up unit as claimed in claim 9, it is characterized in that, described pick-up unit is multimeter, and described multimeter comprises several detection modules, and the assigned frequency of the waveform signal that each detection module provides is all not identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420631433.2U CN204241606U (en) | 2014-10-28 | 2014-10-28 | Detection module and pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420631433.2U CN204241606U (en) | 2014-10-28 | 2014-10-28 | Detection module and pick-up unit |
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| Publication Number | Publication Date |
|---|---|
| CN204241606U true CN204241606U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420631433.2U Expired - Fee Related CN204241606U (en) | 2014-10-28 | 2014-10-28 | Detection module and pick-up unit |
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| CN (1) | CN204241606U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115808611A (en) * | 2022-12-13 | 2023-03-17 | 深圳市耀星微电子有限公司 | Integrated circuit test system |
-
2014
- 2014-10-28 CN CN201420631433.2U patent/CN204241606U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115808611A (en) * | 2022-12-13 | 2023-03-17 | 深圳市耀星微电子有限公司 | Integrated circuit test system |
| CN115808611B (en) * | 2022-12-13 | 2023-11-17 | 深圳市耀星微电子有限公司 | Integrated circuit test system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20171028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |