CN103852616A - Voltage testing module and testing device - Google Patents
Voltage testing module and testing device Download PDFInfo
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- CN103852616A CN103852616A CN201210510331.0A CN201210510331A CN103852616A CN 103852616 A CN103852616 A CN 103852616A CN 201210510331 A CN201210510331 A CN 201210510331A CN 103852616 A CN103852616 A CN 103852616A
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- voltage
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- milliammeter
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Abstract
The invention discloses a voltage testing module and a voltage testing device. The voltage testing module is used for being connected with a milliampere meter comprising a positive electrode terminal and a negative electrode terminal. The voltage testing module comprises a half-wave rectifying circuit, a resistor unit, a static terminal and at least one dynamic terminal, wherein the resistor unit comprises at least one current limiting resistor. The static terminal of the voltage testing device is connected with the negative electrode terminal of the milliampere meter, the half-wave rectifying circuit is connected between the resistor unit and the positive electrode terminal of the milliampere meter in series, one end of each current limiting resistor is connected with the input of the half-wave rectifying circuit, and the other end of each current limiting resistor is connected with the dynamic terminal of the voltage testing device. According to the voltage testing module and the voltage testing device, the testing function of a voltmeter is achieved through the milliampere meter, and replacement between testing tools can be achieved.
Description
Technical field
The present invention relates to a kind of voltage tester technical field, the replacement technology between a kind of easy testing tool of specific design.
Background technology
In the time of circuit voltage, conventionally use special voltage table to detect, but voltage table damage or does not carry sometimes.So just there is detection efficiency and the just problem of Kinetix.How to realize the replacement between testing tool, have technical matters to be solved by becoming.
Summary of the invention
Based on this, be necessary to provide a kind of voltage test module and proving installation, the replacement that it can effectively realize testing tool, conveniently utilizes milliammeter to realize voltage tester function.。
A kind of voltage test module provided by the invention, for connecting the milliammeter that contains positive terminal and negative terminals, it is characterized in that, comprising: half-wave rectifying circuit, the resistance unit that contains at least one current-limiting resistance, for connecting quiet terminals and at least one moving terminals of described milliammeter negative terminals; The output of described half-wave rectifying circuit is for connecting the positive terminal of described milliammeter, one end of described each current-limiting resistance all connects the input of described half-wave rectifying circuit, and the other end of described each current-limiting resistance is connected with moving terminals of described voltage test module respectively.
Wherein, described half-wave rectifying circuit comprises the first diode and the second diode, the negative pole of described the first diode connects the positive terminal of described milliammeter, the positive pole of described the first diode connects negative pole and the described resistance unit of the second diode, and the positive pole of described the second diode connects the quiet terminals of described voltage test module and the negative terminals of described milliammeter.
Wherein, described voltage test module comprises 4 moving terminals, and each moving terminals is connected respectively after a current-limiting resistance and is connected with described half-wave rectification unit.
Wherein, the selection of described current-limiting resistance meets following formula condition: R=(0.45 × V)/I; Wherein, the resistance that R is current-limiting resistance, V is voltage to be measured; I is the range ability of milliammeter.
Wherein, described voltage test module comprises that one for representing the moving terminals of 10V voltage tester gear, and the moving terminals of described 10V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 4K Ω.
Wherein, described voltage test module comprises that one for representing the moving terminals of 50V voltage tester gear, and the moving terminals of described 50V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 21.55K Ω.
Wherein, described voltage test module comprises that one for representing the moving terminals of 250V voltage tester gear, and the moving terminals of 250V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 109.3K Ω.
Wherein, described voltage test module comprises that one for representing the moving terminals of 1000V voltage tester gear, and the moving terminals of 1000V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 438.3K Ω.
Wherein, described voltage test module also comprises that voltage calculates display unit, the current signal input end that described voltage calculates display unit connects described milliammeter for obtaining the current measuring current value of milliammeter, multiple test sides that described voltage calculates display unit are connected with moving terminals of described voltage test module respectively, in the time that described moving terminals have voltage access to be measured, the corresponding test side that described voltage calculates display unit obtains level signal trigger voltage calculating display unit, read the resistance that the described voltage of having stored calculates the current-limiting resistance of place, the corresponding test side of display unit branch road, according to the resistance of the described current-limiting resistance calling and the current measuring current value of described milliammeter, calculating voltage value also shows result of calculation.
The present invention also provides a kind of voltage test device, it comprises above-mentioned any voltage test module and contains positive terminal and the milliammeter of negative terminals, and described half-wave rectifying circuit is connected between described resistance unit and the positive terminal of described milliammeter.
Device of the present invention adopts the design of easy milliammeter composition voltage detecting circuit, has the advantages such as small and exquisite, simple, reliable, only several little components and parts compositions, and volume is very little, can carry, and cost is also only in ten yuan, very low.By detection voltage being connected between quiet terminals and moving terminals, can calculate detection magnitude of voltage by the numerical value of milliammeter, can solve no-voltage table and detect efficiency and the convenience problem that voltage brings.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of the optimum embodiment of the present invention.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing, provide preferred embodiment of the present invention.But the present invention can realize in many different forms, be not limited to embodiment described herein.On the contrary, providing the object of these embodiment is to make to the understanding of disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, it can be directly on another element or also can have an element placed in the middle.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.
Unless otherwise defined, all technology that use are herein identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term using in instructions of the present invention herein, just in order to describe the object of specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
Refer to Fig. 1, a kind of voltage test module 20 that the present embodiment provides, for connecting the milliammeter 10 that contains positive terminal A and negative terminals B, make can be easy utilize milliammeter 10 measuring voltage values, it comprises: half-wave rectifying circuit 21, the resistance unit 22 that contains at least one current-limiting resistance, for connecting quiet terminals C and at least one the moving terminals D of described milliammeter 10 negative terminals B; The output of described half-wave rectifying circuit 21 is for connecting the positive terminal A of described milliammeter 10, one end of described each current-limiting resistance R1, R2 or R3 etc. all connects the input of described half-wave rectifying circuit 21, the other end of described each current-limiting resistance R1, R2 or R3 etc. is connected with a moving terminals D of described voltage test module 20 respectively, and quiet terminals C and terminals D are used for accessing voltage to be measured.In the above-described embodiments visible, by half-wave rectifying circuit and current-limiting resistance by be measured can be that current signal is presented on milliammeter by the voltage transitions of input, thereby can adopt easy milliammeter composition voltage detecting circuit, there is the advantages such as small and exquisite, simple, reliable, the present embodiment can utilize only several little components and parts compositions, and volume is very little, can carry, and cost is also only in ten yuan, very low.Only the module of the present embodiment design need to be connected between the input and voltage to be measured of milliammeter, can calculate detection magnitude of voltage by the numerical value of milliammeter, can solve no-voltage table and detect efficiency and the convenience problem that voltage brings.
Optimum embodiment as shown in Figure 2, in the above-described embodiments, above-mentioned half-wave rectifying circuit 21 comprises the first diode D1 and the second diode D2, the negative pole of described the first diode D1 connects the positive terminal A of described milliammeter A1, the positive pole of described the first diode D1 connects negative pole and the described resistance unit 22 of the second diode D2, and the positive pole of described the second diode D2 connects the quiet terminals T 0 (being the quiet terminals C in Fig. 1) of described voltage test module 20 and the negative terminals B of described milliammeter.Utilize the Opposite direction connection of above-mentioned 2 diodes can conveniently realize the rectified action to voltage to be measured, to meet the input requirements of the current signal of milliammeter.
As shown in Figure 2, on the basis of above-described embodiment, it has provided an optimum embodiment, and concrete connected mode is as follows:
Above-mentioned voltage test module 20 comprises that 4 moving terminals T1, T2, T3 and T4(are the moving terminals D in Fig. 1), each moving terminals T1, T2, T3 or T4 connect respectively after a current-limiting resistance R1, R2, R3 or R4 and are connected with described half-wave rectification unit 21, the one end that is current-limiting resistance R1, R2, R3 or R4 connects respectively moving terminals T1, T2, T3 or T4, and the other end of current-limiting resistance R1, R2, R3 or R4 all connects the positive pole of the first diode D 1 of above-mentioned half-wave rectification unit 21.
Wherein, the selection of above-mentioned current-limiting resistance meets following formula condition: R=(0.45 × V)/I; Wherein, the resistance that R is current-limiting resistance, V is voltage to be measured; I is the range ability of milliammeter.Can design the different voltage detecting gears of fixed voltage test module by setting the resistance size of current-limiting resistance.
In embodiment in Fig. 2, the range ability of milliammeter A1 is preferably 0-1mA, above-mentioned voltage test module comprises 4 moving terminals T1, T2, T3 or T4, it is respectively: T1 is for representing the moving terminals of 10V voltage tester gear, and the moving terminals T1 of this 10V voltage gear connects described half-wave rectification unit 21 by the current-limiting resistance of 4K Ω; T2 is for representing the moving terminals of 50V voltage tester gear, and the moving terminals T2 of this 50V voltage gear connects described half-wave rectification unit 21 by the current-limiting resistance of 21.55K Ω; T3 is for representing the moving terminals of 250V voltage tester gear, and the moving terminals T3 of this 250V voltage gear connects described half-wave rectification unit 21 by the current-limiting resistance of 109.3K Ω; T4 is for representing the moving terminals of 1000V voltage tester gear, and the moving terminals T4 of 1000V voltage gear connects described half-wave rectification unit 21 by the current-limiting resistance of 438.3K Ω.
When in the situation that there is no voltage table; tentatively judge voltage range; select a grade in 10V, 50V, 250V, 1000V; quiet terminals T0 in Fig. 2 and one of them accordingly moving terminals T1, T2, T3 or T4 are accessed to voltage to be measured; if select 250V shelves such as measuring civil power; tested voltage V3 access T0 and T3 test side, now milliammeter A1 can show current value I 1; Calculate tested voltage V3 by V3=I1 × R3/0.45;
Example: while selecting 250V shelves measuring voltage, record I1=0.8mA;
V3=0.0008 × 109300/0.45=194.3V;
Thereby in the situation that not needing voltage table, by milliammeter, can detect very easily tested magnitude of voltage, can solve no-voltage table and detect efficiency and the convenience problem that voltage brings.The present embodiment utilizes milliammeter to form an easy voltage detecting circuit, can also divide different gears to detect simultaneously, and detect various magnitudes of voltage with this.
Certainly, check in order conveniently to make the result of voltage measurement be easy to show, as shown in Figure 1, on the basis of above-described embodiment, above-mentioned voltage test module can also comprise that voltage calculates display unit, the current signal input end that described voltage calculates display unit connects milliammeter 10 for obtaining the current measuring current value of milliammeter 10, multiple test sides that described voltage calculates display unit are connected with a moving terminals D of described voltage test module 20 respectively, in the time that moving terminals D has voltage access to be measured, described voltage calculates the corresponding test side of display unit and obtains level signal trigger voltage calculating display unit, read the resistance that the voltage of having stored calculates the current-limiting resistance of place, the corresponding test side of display unit branch road, according to the resistance of the described current-limiting resistance calling and the current measuring current value of described milliammeter 10, calculating voltage value also shows result of calculation.The computing formula of magnitude of voltage is as follows:
V
0=I
0× R
n/ 0.45, wherein, V
0represent to need the magnitude of voltage of demonstration, I
0represent the current measuring current value of milliammeter, R
nrepresent the resistance of current-limiting resistance.
Multiple moving terminals D are connected respectively a test side of voltage calculating display unit, and in the time that moving terminals D has voltage access, just have the test side that level signal is input to voltage calculating display unit, voltage calculates display unit in the time having perceived the moving terminals D of voltage access, start computing function, utilize above-mentioned formula calculating voltage value, and current-limiting resistance resistance is stored in wherein in advance, each test side is corresponding to a current-limiting resistance value, as long as in the time that test side acquisition level signal need to start computing function, call corresponding current-limiting resistance resistance, just can realize the function that automatic calculating shows magnitude of voltage.The voltage here calculates display unit can adopt chip microcontroller.
Visible by foregoing, the present embodiment can be when reservation milliammeter be realized current sense function, also can utilize it to carry out voltage detecting, so, the present invention also provides a kind of voltage test device, it comprises above-mentioned any voltage test module and contains positive terminal and the milliammeter of negative terminals, and described half-wave rectifying circuit is connected between described resistance unit and the positive terminal of described milliammeter.Specifically:
As shown in Figure 1, a kind of voltage test device that the present embodiment provides, comprises the milliammeter 10, half-wave rectifying circuit 21, the resistance unit 22 that contains at least one current-limiting resistance, quiet terminals C and at least one the moving terminals D that contain positive terminal A and negative terminals B; Quiet terminals C connects described milliammeter 10 negative terminals B, the output of described half-wave rectifying circuit 21 is for connecting the positive terminal A of described milliammeter 10, one end of described each current-limiting resistance R1, R2 or R3 etc. all connects the input of described half-wave rectifying circuit 21, the other end of described each current-limiting resistance R1, R2 or R3 etc. is connected with a moving terminals D of described voltage test module 20 respectively, and quiet terminals C and terminals D are used for accessing voltage to be measured.As for other relevant art features as the specific implementation of half-wave rectifying circuit 21 grades can be referring to above-mentioned related content.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a voltage test module, for connecting the milliammeter that contains positive terminal and negative terminals, it is characterized in that, comprising: half-wave rectifying circuit, the resistance unit that contains at least one current-limiting resistance, for connecting quiet terminals and at least one moving terminals of described milliammeter negative terminals;
The output of described half-wave rectifying circuit is for connecting the positive terminal of described milliammeter, one end of described each current-limiting resistance all connects the input of described half-wave rectifying circuit, and the other end of described each current-limiting resistance is connected with moving terminals of described voltage test module respectively.
2. a kind of voltage test module according to claim 1, it is characterized in that, described half-wave rectifying circuit comprises the first diode and the second diode, the negative pole of described the first diode connects the positive terminal of described milliammeter, the positive pole of described the first diode connects negative pole and the described resistance unit of the second diode, and the positive pole of described the second diode connects the quiet terminals of described voltage test module and the negative terminals of described milliammeter.
3. a kind of voltage test module according to claim 1, is characterized in that, described voltage test module comprises 4 moving terminals, and each moving terminals is connected respectively after a current-limiting resistance and is connected with described half-wave rectification unit.
4. a kind of voltage test module according to claim 1, is characterized in that, the selection of described current-limiting resistance meets following formula condition: R=(0.45 × V)/I; Wherein, the resistance that R is current-limiting resistance, V is voltage to be measured; I is the range ability of milliammeter.
5. a kind of voltage test module according to claim 4, it is characterized in that, described voltage test module comprises that one for representing the moving terminals of 10V voltage tester gear, and the moving terminals of described 10V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 4K Ω.
6. a kind of voltage test module according to claim 4, it is characterized in that, described voltage test module comprises that one for representing the moving terminals of 50V voltage tester gear, and the moving terminals of described 50V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 21.55K Ω.
7. a kind of voltage test module according to claim 4, it is characterized in that, described voltage test module comprises that one for representing the moving terminals of 250V voltage tester gear, and the moving terminals of described 250V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 109.3K Ω.
8. a kind of voltage test module according to claim 4, it is characterized in that, described voltage test module comprises that one for representing the moving terminals of 1000V voltage tester gear, and the moving terminals of 1000V voltage gear connect described half-wave rectification unit by the current-limiting resistance of 438.3K Ω.
9. a kind of voltage test module according to claim 1, it is characterized in that, also comprise that voltage calculates display unit, the current signal input end that described voltage calculates display unit connects described milliammeter for obtaining the current measuring current value of milliammeter, multiple test sides that described voltage calculates display unit are connected with moving terminals of described voltage test module respectively, in the time that described moving terminals have voltage access to be measured, the corresponding test side that described voltage calculates display unit obtains level signal trigger voltage calculating display unit, read the resistance that the described voltage of having stored calculates the current-limiting resistance of place, the corresponding test side of display unit branch road, according to the resistance of the described current-limiting resistance calling and the current measuring current value of described milliammeter, calculating voltage value also shows result of calculation.
10. a voltage test device, it is characterized in that, comprise the claims 1 to 9 any voltage test module and contain positive terminal and the milliammeter of negative terminals, described half-wave rectifying circuit is connected between described resistance unit and the positive terminal of described milliammeter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510331.0A CN103852616A (en) | 2012-11-30 | 2012-11-30 | Voltage testing module and testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210510331.0A CN103852616A (en) | 2012-11-30 | 2012-11-30 | Voltage testing module and testing device |
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| CN103852616A true CN103852616A (en) | 2014-06-11 |
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| CN201210510331.0A Pending CN103852616A (en) | 2012-11-30 | 2012-11-30 | Voltage testing module and testing device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107080U (en) * | 1991-11-13 | 1992-06-10 | 南通县供电局 | Multi-functional three-phase leakage protector |
| CN2791782Y (en) * | 2004-12-16 | 2006-06-28 | 宜春学院 | Multi-purpose experiment instrument for electromagnetism |
| CN201503476U (en) * | 2009-10-16 | 2010-06-09 | 江苏达胜加速器制造有限公司 | Reverse-characteristic testing device for silicon rectifier stack |
-
2012
- 2012-11-30 CN CN201210510331.0A patent/CN103852616A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107080U (en) * | 1991-11-13 | 1992-06-10 | 南通县供电局 | Multi-functional three-phase leakage protector |
| CN2791782Y (en) * | 2004-12-16 | 2006-06-28 | 宜春学院 | Multi-purpose experiment instrument for electromagnetism |
| CN201503476U (en) * | 2009-10-16 | 2010-06-09 | 江苏达胜加速器制造有限公司 | Reverse-characteristic testing device for silicon rectifier stack |
Non-Patent Citations (1)
| Title |
|---|
| 李奇洲1986: "常用工具及使用", 《百度文库》 * |
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Application publication date: 20140611 |