CN202975285U - Device measuring performances of intelligent electric energy meter communication module power supply source - Google Patents

Abstract

The utility model relates to the technical field of devices measuring performances of an intelligent electric energy meter communication module power supply source and especially discloses a device measuring the output voltage and the output power of the intelligent electric energy meter communication module power supply source. The device comprises an intelligent electric energy meter communication module, a resistor, a digital display voltmeter, and electric appliance switches. After being serially connected, the resistor R and the electric appliance switch K2 are further in parallel connection with the digital display voltmeter. Moreover, the resistor R and the electric appliance switch K2 are serially connected with the electric appliance switch K1 and further connected with a detected power supply source in a parallel way through an electrical interface. The device which is characterized by a perfect design principle, simple experimental wirings, and convenient detection processes enables a detection result reflecting the real peak output of the detected power supply source. The device is suitably used for detecting and assessing mass power supply sources for intelligent electric energy meter communication modules.

Description

Intelligent electric energy meter communication module power supply device for measuring properties

Affiliated technical field

The utility model relates to the technical field of intelligent electric energy meter communication module power supply device for measuring properties, the measurement mechanism of especially a kind of intelligent electric energy meter communication module power supply output voltage and output power.

Background technology

It is more and more universal that the application in electrical network is joined, used to intelligent electric energy meter in intelligence in recent years.Intelligent electric energy meter communicates by carrier module and low pressure centralized automatic meter-reading device usually, and its carrier communication module power supply is provided by intelligent electric energy meter.Can the output voltage of power supply, power meet the demands and directly determine the height of intelligent electric energy meter communication reliability.

The correlation technique standard proposes to explicitly call for to intelligent electric energy meter communication module power supply performance index at present, but does not provide concrete measuring method and measurement mechanism in standard.Generally, the output voltage of the resistance measurement intelligent electric energy meter communication module power supply that this test can be by external fixed resistance value calculates its realtime power, and judges accordingly whether the power supply performance index meet the demands.But the method has the following disadvantages:

(1) the non-power supply peak power output of test gained power, experimental result can not reflect the performance of intelligent electric energy meter communication module power supply comprehensively;

(2) experimental wiring is loaded down with trivial details, and testing efficiency is low;

(3) proving installation is the occasional combination device, is not suitable for the detection assessment of intelligent electric energy meter communication module power supply in enormous quantities.

The utility model content

In order to solve the above-mentioned technical matters that exists in prior art, the utility model provides a kind of intelligent electric energy meter communication module power supply device for measuring properties, this device can not only correctly record the peak power output of intelligent electric energy meter communication module power supply, and test process is simple, is fit to the detection assessment of intelligent electric energy meter communication module power supply in enormous quantities.

The technical scheme that its technical matters that solves the utility model adopts is:

Intelligent electric energy meter communication module power supply device for measuring properties comprises intelligent electric energy meter communication module, resistance, digital display voltmeter and electrical equipment beginning; Resistance R and electric switch K ₂After series connection, more in parallel with digital display voltmeter, and then series connection electrical equipment K switch ₁, in parallel with tested power supply by electric interfaces.

It is the resistance of 1 grade that described resistance R is chosen precision, and resistance must be chosen according to the output requirement of the power supply of surveying, and power is greater than 1-2 times of the power supply output power of surveying.

The precision of described digital display voltmeter is 1 grade, range 20V, and input impedance is greater than 10M Ω.

Described electric interfaces adopts 2 * 6 double contact pins as web member, and pin 6-7 is and the power supply of intelligent electric energy meter interface that all the other pins are the sky pin.

The beneficial effects of the utility model are: design concept is correctly perfect, and experimental wiring is simple, and testing process is convenient, and the true peak power output of the tested power supply of measured result reflection is fit to the detection assessment of intelligent electric energy meter communication module power supply in enormous quantities.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is the electric interfaces pin Pareto diagram of the utility model and intelligent electric energy meter.

Embodiment

The utility model is a kind of intelligent electric energy meter communication module power supply device for measuring properties.Comprise a circuit of measuring the power supply peak power output, totally five elements and some wires form this circuit by a resistance, digital display voltmeter, two electric switches, electric interfaces.

In Fig. 1, electric switch K of resistance R series connection ₂After, more in parallel with digital display voltmeter, then by electric switch K of series connection ₁, in parallel with tested power supply by electric interfaces.It is the resistance of 1 grade that resistance R is chosen precision, and resistance must be chosen according to the output requirement of the power supply of surveying, and power is greater than 1-2 times of the power supply output power of surveying.1 grade of the precision of digital display voltmeter, range 20V, input impedance is greater than 10M Ω.As shown in Figure 2, Fig. 2 is the electric interfaces pin Pareto diagram of proving installation and intelligent electric energy meter, adopts 2 * 6 double contact pins as web member, and pin 6,7 is and the power supply of intelligent electric energy meter interface that all the other pins are the sky pin.

The technical requirement of intelligent electric energy meter communication module power supply is: output voltage is at [U _min, U _max] in scope, output power is greater than P ₀This power supply can equivalence be a voltage source, and its voltage is U ₀, internal resistance is r, the communication module resistance is R.

The power of communication module consumption is:

$P=I^{2}R={\left(\frac{U_0}{R+r}\right)}^{2}R=\frac{{U_0}^2}{R+\frac{r^2}{R}+2r}---\left(1\right)$

When The time,

Obtain minimal value, P obtains maximum value, i.e. maximal value.At this moment, R=r is arranged, namely when the communication module resistance equaled the internal resistance resistance, communication module obtained peak power If P _max＜P0, the power supply of surveying defective; If P _max〉=P ₀, can try to achieve output power greater than P ₀The communication module Standard resistance range be [R ₁, R ₂], output power range is at [P in this Standard resistance range ₀, P _max] in.

By electric resistance partial pressure principle U/U as can be known ₀=R/ (R+r), and U ∈ [U _min, U _max], can try to achieve the communication module Standard resistance range that satisfies this output voltage range is [R ₃, R ₄].

If [R ₁, R ₂] ∩ [R ₃, R ₄]=Φ surveys intelligent electric energy meter communication module power supply defective; If [R ₁, R ₂] ∩ [R ₃, R ₄] ≠ Φ surveys power supply qualified.At this moment, when the communication module resistance at [max (R ₁, R ₃), min (R ₂, R ₄)] when scope was interior, power supply satisfied output voltage at [U _min, U _max] between, output power is greater than P ₀Requirement.

By top theoretical analysis as can be known: according to given technical requirement, just can calculate and judge whether the intelligent electric energy meter communication module power supply of surveying meets the demands as long as record internal resistance and the no-load voltage of power supply.

Use the operation steps of this device detection intelligent electric energy meter communication module power supply output power as follows:

1. in the situation that carrier module is extracted in the intelligent electric energy meter outage, the electric interfaces contact pin insertion intelligent electric energy meter power supply interface with this device is placed in off-state with two switches;

2. connect the power supply of intelligent electric energy meter, turn on-switch K ₁, read the reading of voltage table, be designated as U ₁

3. turn on-switch K ₂, read the reading of voltage table, be designated as U ₂

4. calculate the internal resistance of power supply according to formula (1);

$r=\frac{(U_1-U_2)R}{U_2}---\left(1\right)$

5. calculate the peak power output of this intelligent electric energy meter communication module power supply according to formula (2);

$P_{\max }=\frac{{\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="121024112415.png"\; state="\{\{state\}\}">U</figure-callout>}}_1}{4r}---\left(2\right)$

6. if P _max＜P ₀, power supply is defective.Otherwise forward 7 to;

7. obtain output power greater than P according to formula (3) ₀Standard resistance range R ∈ [R ₁, R ₂];

$\frac{{{\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="121024112415.png"\; state="\{\{state\}\}">U</figure-callout>}}_1}^2}{R+\frac{r^2}{R}+2r}=P_0---\left(3\right)$

8. by the electric resistance partial pressure principle as can be known:

$\frac{U_x}{{\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="121024112415.png"\; state="\{\{state\}\}">U</figure-callout>}}_1}=\frac{R}{R+r}---\left(4\right)$

U wherein _x∈ [U _min, U _max], can try to achieve output voltage at [U _min, U _max] between Standard resistance range R ∈ [R ₃, R ₄].

9. if [R ₁, R ₂] ∩ [R ₃, R ₄]=Φ, the power supply of surveying undesirable; Otherwise the power supply of surveying meets the requirements, and draws experiment conclusion;

10. experiment conclusion: if P _max＜P ₀, or [R ₁, R ₂] ∩ [R ₃, R ₄]=Φ, the power supply of surveying defective; If P _max〉=P ₀And [R ₁, R ₂] ∩ [R ₃, R ₄] ≠ Φ surveys intelligent electric energy meter communication module power supply output voltage and output power qualified, and as communication module resistance R ∈ [max (R ₁, R ₃), min (R ₂, R ₄)] time, the intelligent electric energy meter communication module power supply output voltage of surveying at [U _min, U _max] in scope, output power is at [P ₀, P _max] in scope.

The utility model experimental wiring is simple, can measure quantitatively intelligent electric energy meter communication module power supply peak power output according to given technical requirement, can further judge accordingly its whether requirement up to specification of output.

Claims (4)

1. intelligent electric energy meter communication module power supply device for measuring properties, comprise intelligent electric energy meter communication module, resistance, digital display voltmeter and electrical equipment beginning; It is characterized in that: resistance R and electric switch K ₂After series connection, more in parallel with digital display voltmeter, and then series connection electrical equipment K switch ₁, in parallel with tested power supply by electric interfaces.

2. intelligent electric energy meter communication module power supply device for measuring properties according to claim 1 is characterized in that: it is the resistance of 1 grade that described resistance R is chosen precision, and the 1-2 that power is greater than the power supply output power of surveying doubly.

3. intelligent electric energy meter communication module power supply device for measuring properties according to claim 1, it is characterized in that: the precision of described digital display voltmeter is 1 grade, range 20V, input impedance is greater than 10M Ω.

4. intelligent electric energy meter communication module power supply device for measuring properties according to claim 1, it is characterized in that: described electric interfaces adopts 2 * 6 double contact pins as web member, pin 6-7 is and the power supply of intelligent electric energy meter interface that all the other pins are the sky pin.

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