CN104297579A - Detection device and method - Google Patents
Detection device and method Download PDFInfo
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- CN104297579A CN104297579A CN201310296111.7A CN201310296111A CN104297579A CN 104297579 A CN104297579 A CN 104297579A CN 201310296111 A CN201310296111 A CN 201310296111A CN 104297579 A CN104297579 A CN 104297579A
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- voltage
- unit
- capacitance voltage
- capacity cell
- capacitance
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Abstract
The invention relates to a detection device. The detection device is used for detecting the performance of a capacitor element in a circuit of a circuit board. The detection device includes a voltage generating unit, a timing unit, a voltage acquisition unit, a judging unit and a prompting unit, wherein the voltage generating unit is used for charging the capacitor element and generating a timing instruction and capacitor voltage, the timing unit is used for responding to the timing instruction so as to start timing and outputs a control instruction when timed time reaches a predetermined time, the voltage acquisition unit is used for responding to the control instruction so as to acquire the capacitor voltage, the judging unit is used for judging whether the relationship between the acquired capacitor voltage and reference voltage meets a preset condition, and generates a prompting signal when the relationship does not meet the preset condition, and the prompting unit is used for responding to the prompting signal and generating prompting information so as to prompt detection personnel of the anomaly of the capacitor element. The detection device and method have the advantages of simple operation and low cost.
Description
Technical field
The present invention relates to a kind of pick-up unit and method, particularly relate to a kind of pick-up unit and method of Detection capacitance element function.
Background technology
In the development phase of electronic product, usually need to test the circuit board of electronic product, to guarantee the performance of electronic product and the good of function.But in the journey that circuit and the element of circuit board are detected, to being detected as the most important thing of the performance of capacity cell.Existing detection method is for receive in measurement circuit by digital multimeter, then the data reading multimeter confirm that whether surveyed capacity cell performance is up to specification.The multimeter that this detection method needs price high, cost is higher.
Summary of the invention
In view of this, be necessary to provide a kind of lower-cost pick-up unit with Detection capacitance element.
In addition, there is a need to provide a kind of lower-cost detection method.
This pick-up unit, for the performance of the capacity cell in testing circuit printed line road, the two ends of described capacity cell are electrically connected with two pins of the connector of described circuit board respectively.Described pick-up unit comprises voltage generating unit, timing unit, voltage acquisition unit, judging unit and Tip element.Described voltage generating unit is used for charging to capacity cell, and produces riming instructions and capacitance voltage.Described timing unit starts timing for responding riming instructions, and exports steering order when timing time reaches the schedule time.Described voltage acquisition unit is used for response limiting instruction acquisition capacitance voltage.Described judging unit for judging whether the relation between the capacitance voltage of collection and reference voltage meets the condition preset, and produces cue when not meeting predetermined condition.Described Tip element produces information to point out testing staff's capacity cell abnormal for responding described cue.
This detection method, for the performance of capacity cell in pick-up unit testing circuit printed line road, the two ends of described capacity cell are electrically connected with two pins of the connector of described circuit board respectively.This detection method comprises the steps:
Capacity cell is charged;
Timing is carried out to the duration of charging of capacity cell;
Judge whether the duration of charging of capacity cell reaches Preset Time, if reach Preset Time to export steering order;
Gather the capacitance voltage of capacity cell;
Judge whether the relation between the capacitance voltage of collection and reference voltage meets the condition preset, and produce cue when not meeting predetermined condition; And
Response cue produces information to point out testing staff's capacity cell abnormal.
Above-mentioned detection device and detection method, adopt the pick-up unit be only made up of basic electronic component to replace the high multimeter of price to carry out the performance of Detection capacitance element, reduce cost.
Accompanying drawing explanation
Fig. 1 is pick-up unit applied environment schematic diagram.
Fig. 2 is the oscillogram of capacitive element voltage.
Fig. 3 is the functional block diagram of the pick-up unit of a better embodiment.
Fig. 4 is the voltage generating unit circuit diagram of the pick-up unit of a better embodiment.
Fig. 5 is the process flow diagram of the detection method of a better embodiment.
Main element symbol description
| Pick-up unit | 10 |
| Device to be detected | 20 |
| First connector | L1 |
| First pin | L11 |
| Second pin | L12 |
| Second connector | L2 |
| 3rd pin | L21 |
| 4th pin | L22 |
| Capacity cell | C |
| Voltage generating unit | 110 |
| Timing unit | 111 |
| Voltage acquisition unit | 112 |
| Judging unit | 113 |
| Tip element | 114 |
| Output unit | 115 |
| Voltage source | VCC |
| Resistance | R |
| Switch | K |
| Detecting voltage point | N1 |
| Method of testing | S201~S210 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 1, pick-up unit 10 is for detecting the performance of device 20 to be detected.Pick-up unit 10 is provided with the first connector L1.Device 20 to be detected is circuit board, which is provided with the second connector L2 and various electronic component, such as: chip, resistance, capacity cell C.Wherein, the two ends of capacity cell C are electrically connected with two pins of the second connector L2.During detection, connect with electric wire (such as Cable) between the first connector L1 and the second connector L2, and then the circuit in capacity cell C and pick-up unit 10 is electrically connected.Pick-up unit 10 is for detecting the capacity cell C on device 20 to be detected, and whether such as Detection capacitance element C is short-circuited, open circuit, capacitance is less than normal or bigger than normal and whether go up wrong part etc.
Please refer to Fig. 2, it illustrates when capacity cell C normally works, the oscillogram of capacitance voltage and time relationship.According to the charging characteristic curve equation V=ξ (1-e of capacity cell C
-T/RC) known, capacitance voltage can increase along with the elongated of time when the capacitance of the resistance of resistance and capacity cell is fixed, the corresponding magnitude of voltage V of each time point T and reference voltage in the charging process of capacity cell C.In the first charging stage, the velocity ratio that capacity cell C charges is very fast, and capacitance voltage increases very fast along with the change of time; In the second charging stage, capacity cell C charge close to state of saturation, capacitance voltage along with the time change increase slower.First charging stage was T< τ; Second charging stage was T>3 τ.τ is the time constant of the charging circuit of capacity cell C.In the present embodiment, τ=R*C.
But if capacity cell C is in off state or capacitance is less than normal or upper mistake element, capacity cell C is greater than corresponding reference voltage at the capacitance voltage of the first charging stage (T< τ); If capacity cell C is in short-circuit condition or capacitance is bigger than normal or upper mistake element, capacity cell C will be less than corresponding reference voltage at the capacitance voltage of the second charging stage (T>3 τ).Therefore, in the present embodiment, the capacitance voltage of the time point of pick-up unit 10 within the first charging stage and a time point detecting capacity cell C within the second charging stage, and the performance judging capacity cell C according to the relation of capacitance voltage and reference voltage.
Please refer to Fig. 3, it is the functional block diagram of the pick-up unit 10 of a better embodiment.Pick-up unit 10 comprises voltage generating unit 110, timing unit 111, voltage acquisition unit 112, judging unit 113, Tip element 114 and output unit 115.
Voltage generating unit 110 charges to capacity cell C for providing a voltage, and produces riming instructions and capacitance voltage.
Please refer to Fig. 4, it is the circuit diagram of the voltage generating unit 110 of the pick-up unit 10 of a better embodiment.Voltage generating unit 110 comprises voltage source V CC, resistance R and K switch.Voltage source V CC is used for providing a voltage to capacity cell C.Resistance R is connected between voltage source V CC and K switch.Further, the first connector L1 comprises the first pin L11 and the second pin L12.Wherein, the first pin L11 is connected with one end of K switch, the second pin L12 ground connection.Second connector L2 comprises the 3rd pin L21 and the 4th pin L22, capacity cell C are connected between the 3rd pin L21 and the 4th pin L22.After pick-up unit 10 and device 20 to be detected are electrically connected, K switch closes, and resistance R and capacity cell C forms a charging circuit.Get a detecting voltage point N1 to be connected with voltage acquisition unit 112.When K switch closes, voltage generating unit 110 produces riming instructions, and capacity cell C starts charging, and detecting voltage point N1 place produces capacitance voltage simultaneously.
Timing unit 111 starts to carry out timing to the duration of charging of capacity cell C for responding riming instructions, exports the first steering order when the duration of charging of capacity cell C reaches the first Preset Time; The second steering order is exported when the duration of charging of capacity cell C reaches the second Preset Time.First Preset Time is a time point in the first charging stage.Second Preset Time is a time point in the second charging stage.
Voltage acquisition unit 112, for responding the first steering order and second steering order of timing unit 111 output, gathers the capacitance voltage at detecting voltage point N1 place.Capacitance voltage in the first Preset Time collection is called the first capacitance voltage below, is called the second capacitance voltage at the capacitance voltage of the second Preset Time collection.
Judging unit 113 for capacitance voltage and corresponding reference voltage being compared, and judges whether meet default condition between capacitance voltage and corresponding reference voltage.If the relation between capacitance voltage and reference voltage does not meet pre-conditioned, then judging unit 113 produces cue; If the relation between capacitance voltage and reference voltage meets pre-conditioned, then judging unit 113 stops producing cue.Particularly, first capacitance voltage and the first reference voltage compare and the second capacitance voltage and the second reference voltage are compared by judging unit 113, when the first capacitance voltage is greater than the first reference voltage and the second capacitance voltage is less than the second reference voltage, judging unit 113 produces cue.This first reference voltage is the charging characteristic curve equation V=ξ (1-e according to capacity cell C
-T/RC) and the first Preset Time calculate and obtain.This second reference voltage is the charging characteristic curve equation V=ξ (1-e according to capacity cell C
-T/RC) and the second Preset Time calculate and obtain.
Tip element 114 falls short of specifications to point out capacity cell C for responding cue and producing information according to cue.In the present embodiment, information is the sound that hummer sends.In other embodiments, information can be the light on and off instruction of LED or the change of color, also can be that other have the information of suggesting effect.
Output unit 115 is for exporting corresponding test result.Understandably, this test result with represent survey capacity cell C whether up to specification.
Please refer to Fig. 5, it is the process flow diagram of the detection method of a better embodiment.Detection method comprises the steps:
Step S201, provides a voltage to charge to capacity cell C.
Step S202, carries out timing to the duration of charging of capacity cell C.
Step S203, judges whether the duration of charging of capacity cell C reaches the first Preset Time.If the duration of charging of capacity cell C reaches the first Preset Time, export the first steering order and enter step S204.
Step S204, gathers first capacitance voltage at detecting voltage point N1 place.
Step S205, judges the relation between the first capacitance voltage and the first reference voltage.If the first capacitance voltage is greater than the first reference voltage, produces cue and enter step S210; If the first capacitance voltage is not more than the first reference voltage, enter step S206.
Step S206, judges whether the duration of charging of capacity cell C reaches the second Preset Time.If the duration of charging of capacity cell C reaches the second Preset Time, export the second steering order and enter step S207.
Step S207, gathers second capacitance voltage at detecting voltage point N1 place.
Step S208, judges the relation between the second capacitance voltage and the second reference voltage.If the second capacitance voltage is less than the second reference voltage, produces cue and enter step S210; If the second capacitance voltage is not less than the second reference voltage, enter step S209.
Step S209, exports test result up to specification.
Step S210, produces information, falls short of specifications to point out capacity cell C; Export the test result fallen short of specifications simultaneously.
Above-mentioned detection device 10 and detection method, the multimeter adopting the pick-up unit 10 be only made up of basic electronic component to replace price high carrys out the performance of Detection capacitance element C, reduces cost.
Those skilled in the art will be appreciated that; above embodiment is only used to the present invention is described; and be not used as limitation of the invention; as long as within spirit of the present invention, the suitable change do above embodiment and change all drop within the scope of protection of present invention.
Claims (9)
1. a pick-up unit, for the performance of the capacity cell in testing circuit printed line road; The two ends of described capacity cell are electrically connected with two pins of the connector of described circuit board respectively; It is characterized in that: described pick-up unit comprises voltage generating unit, timing unit, voltage acquisition unit, judging unit and Tip element; Described voltage generating unit is used for charging to capacity cell, and produces riming instructions and capacitance voltage; Described timing unit starts timing for responding riming instructions, and exports steering order when timing time reaches the schedule time; Described voltage acquisition unit is used for response limiting instruction acquisition capacitance voltage; Described judging unit for judging whether the relation between the capacitance voltage of collection and reference voltage meets the condition preset, and produces cue when not meeting predetermined condition; Described Tip element produces information to point out testing staff's capacity cell abnormal for responding described cue.
2. pick-up unit as claimed in claim 1, is characterized in that: described Preset Time comprises the first Preset Time; Described capacitance voltage comprises the first capacitance voltage, and described first capacitance voltage is the capacitance voltage that described voltage acquisition unit gathers at described first Preset Time; Described reference voltage comprises the first reference voltage; Described judging unit is used for described first capacitance voltage and described first reference voltage to compare, and produces cue when described first capacitance voltage is greater than described first reference voltage.
3. pick-up unit as claimed in claim 2, it is characterized in that: described first Preset Time is a time point in capacity cell first charging stage, the time constant of described first charging stage, to be T< τ, τ the be charging circuit of capacity cell.
4. pick-up unit as claimed in claim 2, is characterized in that: described Preset Time comprises the second Preset Time; Described capacitance voltage comprises the second capacitance voltage, and described second capacitance voltage is the capacitance voltage that described voltage acquisition unit gathers at described second Preset Time; Described reference voltage comprises the second reference voltage; Described judging unit is used for described second capacitance voltage and described second reference voltage to compare, and produces cue when described second capacitance voltage is less than described second reference voltage.
5. pick-up unit as claimed in claim 4, it is characterized in that: described second Preset Time is a time point in capacity cell second charging stage, the time constant of described second charging stage, to be T>3 τ, τ the be charging circuit of capacity cell.
6. pick-up unit as claimed in claim 1, is characterized in that: described voltage generating unit comprises voltage source, resistance and switch; Described voltage source is used for providing a voltage to described capacity cell; Described resistance is connected between voltage source and switch.
7. a detection method, for the performance of capacity cell in pick-up unit testing circuit printed line road, the two ends of described capacity cell are electrically connected with two pins of the connector of described circuit board respectively; This detection method comprises the steps:
Capacity cell is charged;
Timing is carried out to the duration of charging of capacity cell;
Judge whether the duration of charging of capacity cell reaches Preset Time, if reach Preset Time to export steering order;
Gather the capacitance voltage of capacity cell;
Judge whether the relation between the capacitance voltage of collection and reference voltage meets the condition preset, and produce cue when not meeting predetermined condition; And
Response cue produces information to point out testing staff's capacity cell abnormal.
8. detection method as claimed in claim 7, it is characterized in that: described Preset Time comprises the first Preset Time, described capacitance voltage comprises the first capacitance voltage, and described first capacitance voltage is the capacitance voltage gathered at described first Preset Time; Described reference voltage comprises the first reference voltage; Described judge to gather capacitance voltage and reference voltage between the relation step that whether meets the condition preset comprise the steps:
Described first capacitance voltage and described first reference voltage are compared;
If described first capacitance voltage is greater than described first reference voltage, judge that the relation between described first capacitance voltage and described first reference voltage does not meet the condition preset.
9. detection method as claimed in claim 7 or 8, is characterized in that: described Preset Time comprises the second Preset Time; Described capacitance voltage comprises the second capacitance voltage, and described second capacitance voltage is the capacitance voltage gathered at described second Preset Time; Described reference voltage comprises the second reference voltage; Described judge to gather capacitance voltage and reference voltage between the relation step that whether meets the condition preset comprise the steps:
Described second capacitance voltage and described second reference voltage are compared;
If described second capacitance voltage is less than described second reference voltage, judge that the relation between described second capacitance voltage and described second reference voltage does not meet the condition preset.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310296111.7A CN104297579A (en) | 2013-07-15 | 2013-07-15 | Detection device and method |
| TW102125843A TW201502535A (en) | 2013-07-15 | 2013-07-19 | Test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310296111.7A CN104297579A (en) | 2013-07-15 | 2013-07-15 | Detection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104297579A true CN104297579A (en) | 2015-01-21 |
Family
ID=52317384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310296111.7A Pending CN104297579A (en) | 2013-07-15 | 2013-07-15 | Detection device and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104297579A (en) |
| TW (1) | TW201502535A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526398A (en) * | 2016-10-28 | 2017-03-22 | 昆山国显光电有限公司 | Detection method and device of capacitive touch screen |
| CN107037351A (en) * | 2016-12-15 | 2017-08-11 | 珠海格力电器股份有限公司 | Detection circuit and method, power down time-delay mechanism, the electrical equipment of power down delay circuit |
| CN110618345A (en) * | 2019-11-04 | 2019-12-27 | 业成科技（成都）有限公司 | Method and device for detecting line damage |
| CN111578439A (en) * | 2020-05-27 | 2020-08-25 | 珠海格力电器股份有限公司 | Wet hand detection device, drive-by-wire ware and air conditioner of touch button |
-
2013
- 2013-07-15 CN CN201310296111.7A patent/CN104297579A/en active Pending
- 2013-07-19 TW TW102125843A patent/TW201502535A/en unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526398A (en) * | 2016-10-28 | 2017-03-22 | 昆山国显光电有限公司 | Detection method and device of capacitive touch screen |
| CN106526398B (en) * | 2016-10-28 | 2019-08-27 | 昆山国显光电有限公司 | The detection method and detection device of capacitive touch screen |
| CN107037351A (en) * | 2016-12-15 | 2017-08-11 | 珠海格力电器股份有限公司 | Detection circuit and method, power down time-delay mechanism, the electrical equipment of power down delay circuit |
| CN110618345A (en) * | 2019-11-04 | 2019-12-27 | 业成科技（成都）有限公司 | Method and device for detecting line damage |
| CN111578439A (en) * | 2020-05-27 | 2020-08-25 | 珠海格力电器股份有限公司 | Wet hand detection device, drive-by-wire ware and air conditioner of touch button |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201502535A (en) | 2015-01-16 |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |