CN2205561Y - DC electricity tester - Google Patents
DC electricity tester Download PDFInfo
- Publication number
- CN2205561Y CN2205561Y CN 94212571 CN94212571U CN2205561Y CN 2205561 Y CN2205561 Y CN 2205561Y CN 94212571 CN94212571 CN 94212571 CN 94212571 U CN94212571 U CN 94212571U CN 2205561 Y CN2205561 Y CN 2205561Y
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- China
- Prior art keywords
- test pencil
- negative pole
- direct current
- positive pole
- contact
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a DC electricity testing pencil, composed of a plastic outer shell with a display window, a positive pole testing contact head, and a negative pole testing contact head. The utility model is characterized in that a testing circuit which is composed of a voltage divider, a comparator, a displayer and an alarm is arranged between the positive pole testing contact head and the negative pole testing contact head. The DC electricity testing pencil has the advantages of small volume, low cost, and convenient carryover. The utility model can measure the working voltage, the electric discharge voltage and the charging limitation of storage batteries at any time. Each block is solely displayed at digitals with different colors. The utility model can be audible and visual alarm.
Description
The utility model relates to a kind of direct current test pencil.
The direct current test pencil that prior art provides, by connecting the circuit of forming by resistance, light emitting diode and diode between the positive and negative electrode test contact, its weak point is to measure the voltage of accumulator, display error is big, testing result to the discharge limit, charging limit and the normal working voltage of accumulator can not show separately, but from the top grade to the low grade, show together, make the driver can not accurately judge the duty of accumulator.
The object of the present invention is to provide that a kind of volume is little, in light weight, price is low, can accurately show each stage working condition of accumulator and online circuit trouble spot measurement, use direct current test pencil easy to carry.
Technical characterstic of the present invention is, circuit is formed test circuit by voltage divider, comparer, display and alarm, the circuit voltage divider utilizes the hypotensive effect of diode cleverly, reach dividing potential drop to DC voltage, voltage divider is divided into eight grades, is respectively 5.25V, 6.25V, 7.05V, 10.5V, 11.5V, 12.5V, 13.5V, 14.1V.Circuit comparator is made up of voltage stabilizing diode, resistance, triode, is measurement result is compared the corresponding gear that shows of back input.Display is made up of triode, light emitting diode and flicker light emitting diode, with different measurement results with the digital luminous demonstration of different colours or glimmer luminous and sounding alarm.Make the driver judge whether battery tension normally reaches the fault point.
The technical solution of this direct current test pencil in conjunction with the accompanying drawings 1, direct current test pencil synoptic diagram, Fig. 2, direct current test pencil circuit diagram is described further.
This direct current test pencil structure as shown in Figure 1, it connects positive contact 2 by rectangle plastics shell 6 its anterior dress rod-pulling type leads 3, the other end of shell 6 is connected with negative contact terminal 1 by reel tape type lead 4, shell 6 front surfaces are provided with nine windows 5 that have a display digit and establish logical, 5.25,6.25,7.05,10.5,11.5,12.5,13.5,14.1 totally nine lattice, the shell right lower quadrant is provided with function switch k, testing circuit is made of resistance, diode, flicker light emitting diode, stabilivolt and three pipes, is contained in the plastic casing 6 and forms.
Fig. 2. be the circuit diagram of a kind of embodiment of the present utility model, voltage divider be by D1--D14 totally 14 diodes be composed in series, and locate to be connected with the negative pole of voltage stabilizing diode DW1---DW8 respectively at each dividing point (5.25,6.25,7.05,10.5,11.5,12.5,13.5,14.1); Comparer, display, alarm, form by the negative pole of test pencil seven switch triode BG1--BG7 in parallel, seven LED 1---LED7, two flicker light emitting diode BTS1, BTS2 and alarm buzzer F, the anodal connecting resistance of all kinds of light emitting diodes (except the LED1), the resistance other end connects stabilivolt positive pole corresponding with it respectively, the base stage connecting resistance of each triode, the resistance other end connect the stabilivolt positive pole of corresponding branch road next stage with it respectively.The annexation of its each electronic component is as follows: the survey of direct current test pencil electricity negative pole and totally seven of triode BG1--BG7() emitter be connected, simultaneously also with totally seven of LED 1--LED7() negative pole be connected, the negative pole of flicker light emitting diode BTS1, BTS2 is connected with the electric negative pole of the survey of test pencil by hummer F; The positive pole of LED 1 and button cell E(power supply) negative pole be connected, 2. the positive pole of battery is connected with the contact of switch K; The positive pole of flicker light emitting diode, light emitting diode BTS1, LED2, LED3, BTS2, LED4, LED5, LED6, LED7 respectively with totally 8 of biasing resistor Rc1--Rc7, R() be connected, (except the LED 7) simultaneously also is connected with the collector of triode BG1--BG7; Resistance R c1--Rc7, the R other end respectively with totally 8 of voltage stabilizing diode DW1--DW8() positive pole be connected; The base stage of triode BG1--BG7 meets totally 7 of biasing resistor Rb1--Rb7(), the other end of resistance is connected with voltage stabilizing diode DW2--DW8 positive pole respectively; 1. the negative pole of voltage stabilizing diode DW1 is connected with the contact of the anodal switch K of survey electricity of direct current test pencil, also is connected with the positive pole of diode D1--D2 series connection simultaneously; The negative pole of diode D1--D2 series connection is connected with the positive pole of diode D5, also is connected with the negative pole of voltage stabilizing diode DW2 simultaneously; The negative pole of diode D5 is connected with the positive pole of diode D6, also is connected with the negative pole of voltage stabilizing diode DW3 simultaneously; The negative pole of diode D6 is connected with the positive pole of diode D7, D8 series connection, also is connected with the negative pole of voltage stabilizing diode DW4 simultaneously; The negative pole of diode D7, D8 series connection is connected with the positive pole of diode D9, D10 series connection, also is connected with the negative pole of voltage stabilizing diode DW5 simultaneously; The negative pole of diode D9, D10 series connection is connected with the positive pole of diode D11, D12 series connection, also is connected with the negative pole of voltage stabilizing diode DW6 simultaneously; The negative pole of diode D11, D12 series connection is connected with the positive pole of diode D13, D14 series connection, also is connected with the negative pole of voltage stabilizing diode DW7 simultaneously; The negative pole of diode D13, D14 series connection is connected with the negative pole of voltage stabilizing diode DW8;
The principle of work of this direct current test pencil is as follows: when 1. switch K and contact joined, circuit was in the battery tension detected state.Automobile storage battery is divided into 6V, 12V, the normal working voltage of 6V accumulator is about 6.25V, the normal working voltage of 12V accumulator is between the 11.5V--13.5V, the discharge limiting voltage of accumulator, the 6V accumulator is 5.25V, the 12V accumulator is 10.5V, and the charging limit voltage 6V accumulator of accumulator is 7.05V, and the 12V accumulator is 14.1V.If battery tension is lower than the discharge limiting voltage, accumulator maintenance is immediately charged or near scrapping state, is higher than charging limit voltage so, should stop charging immediately.When battery tension equals the 5.25V(6V accumulator) or the 10.5V(12V accumulator) time, stabilivolt DW1 or DW4 reverse breakdown, be in conducting state, Rc1, Rc4 branch road make flicker light emitting diode BTS1, BTS2 send out flicker ruddiness, hummer F sounding alarm is realized discharge limit sound and light alarm simultaneously.When voltage is 6.25V or 11.5V, because electric current produces pressure drop by D1--D4 or D1--D8, make DW2 or DW5 conducting, Rc branch current corresponding with it makes LED 2 or LED4 work, and be shown in green.The luminous displaying principle of other normal working voltage and the like.
When charge in batteries voltage reaches 7.05V or 14.1V, stabilivolt DW3 or DW8 conducting, Rc3 corresponding with it or R branch current make LED 3 or LED7 burn red number, answer complete charge with warning.
Every grade of this circuit shows separately, because triode BG1--BG7 is as driving or closing display device and realize, accurately show its existence, its principle of work is as follows: be example with BG1, when tested voltage equaled 5.25V, triode was in cut-off state, the DW1 conducting, A point current potential is close to the pressure drop of 5.25V(DW1, Rc1 and ignores), BTS1 enters the luminous alarm condition of work; When tested voltage is higher than 5.25V and during near 6.25V, stabilivolt DW2 conducting; The BG1 base potential raises, and makes triode BG1 enter the saturation conduction state rapidly by ending, and this moment, A point current potential descended rapidly near zero, and BTS1 stops luminous warning because of losing voltage.Last shelves branch road is closed in realization, makes every grade to show the same BG1 of BG2--BG7 principle of work separately.
When switch K and contact were 2. closed mutually, circuit enters online apparatus failure point to be judged and detects, if when circuit-under-test is path, and LED 1 conducting, under the button cell effect, luminous demonstration, color is a redness.Otherwise LED1 is not luminous, and indication circuit is in off state.It is that the expression accumulator is in discharge limit place that flash red light adds sound, needs the charging maintenance; Green light is that the expression accumulator is in normal operating conditions and shows its electricity value; Sodium yellow is that expression 12V accumulator is in when charging, the state of its maximum operating voltage when the transition of limit electricity; Flash red does not represent that only accumulator has reached charging limit, need stop charging.
This direct current test pencil can detect the normal working voltage, the discharge limiting voltage that show accumulator at any time, and independent numeral and acoustooptic display alarm with different colours.Therefore this direct current test pencil complete machine working current is inappreciable to the automobile electrical amount about 15mA, also can place in circuit shows the situation and the voltage of accumulator at any time, reminds the driver to note.
This direct current test pencil is designed to 6V, 12V accumulator usefulness, if detect the voltage of 24V accumulator, accumulator can be separated independent measurement (because of the 24V accumulator is to be in series by two 12V batteries).
This direct current test pencil can be widely used in lorry, passenger vehicle, car, motorcycle and household electrical appliance and detect.
Embodiment:
D1,2,3,5,6,7,9,11,13 is a silicon diode, every tube voltage drop 0.6V
D4,8,10,12,14 is a germanium diode, every tube voltage drop 0.2V
DW1, DW4 are the 5V voltage stabilizing diode
DW2, DW3, DW5, DW6, DW7, DW8 are the 3V voltage stabilizing diode
Rc1, Rc4 are 1.5K Ω, and Rc2, Rc3, Rc5, Rc6, Rc7 are 1K Ω
Rb1, Rb2, Rb4, Rb5, Rb6, Rb7 are 15K Ω,
Rb3 is 25K Ω, and R is 32K Ω
BTS1, BTS2 are red flicker light emitting diode, expression discharge lower limit
LED1,3,7 is a red light emitting diodes, and warning shows
LED2,4,5 is a green LED, the normal demonstration
LED6 is a yellow light-emitting diode, and transition shows
BG1--BG7 is the miniwatt silicon switching triode
Volume: length * wide * height=130 * 40 * 20mm
Claims (5)
1, a kind of direct current test pencil, it is by the plastic casing 6 that has display window 5 and function switch K, anodal test contact 2, negative pole test contact 1, etc. parts form, it is characterized in that, between the positive and negative electrode contact, form test circuit by switch K, voltage divider, comparer, display and alarm.
2, by the described direct current test pencil of claim 1, it is characterized in that described voltage divider be by D1--D14 totally 14 diodes be composed in series, and be connected with the negative pole of voltage stabilizing diode DW1-----DW8 respectively at each dividing point 5.25,6.25,7.05,10.5,11.5,12.5,13.5,14.1 places.
3, by the described direct current test pencil of claim 1, it is characterized in that described comparer, display, alarm, form by the negative pole of test pencil seven switch triode BG1---BG7 in parallel, seven light emitting diodes, two flicker light emitting diodes and alarm buzzer, all kinds of light emitting diodes, except the LED1, anodal connecting resistance, the resistance other end connects stabilivolt positive pole corresponding with it respectively, the base stage connecting resistance of each triode, the resistance other end connect the stabilivolt positive pole of corresponding branch road next stage with it respectively.
4, by the described direct current test pencil of claim 1, it is characterized in that 1. described switch K is transformed into the contact by the contact and 2. joins with test pencil internal electric source positive pole, the positive pole of the negative pole of battery and LED 1 joins, and the negative pole of LED 1 and the negative contact terminal of test pencil are joined.
5, by the described direct current test pencil of claim 1, it is characterized in that nine display aperture and switch hole are arranged on the described plastic casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212571 CN2205561Y (en) | 1994-05-30 | 1994-05-30 | DC electricity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212571 CN2205561Y (en) | 1994-05-30 | 1994-05-30 | DC electricity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205561Y true CN2205561Y (en) | 1995-08-16 |
Family
ID=33829384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94212571 Expired - Fee Related CN2205561Y (en) | 1994-05-30 | 1994-05-30 | DC electricity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205561Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854378A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | Current testing circuit |
| CN103076535A (en) * | 2013-01-05 | 2013-05-01 | 昆山宾达精密配件有限公司 | Conductivity detector |
-
1994
- 1994-05-30 CN CN 94212571 patent/CN2205561Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854378A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | Current testing circuit |
| CN102854378B (en) * | 2011-06-30 | 2015-01-28 | 海洋王照明科技股份有限公司 | Current testing circuit |
| CN103076535A (en) * | 2013-01-05 | 2013-05-01 | 昆山宾达精密配件有限公司 | Conductivity detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |