CN214750770U - Plug discharge capability verification sample of electronic and electrical product - Google Patents

Abstract

The utility model relates to an electron electrical product plug discharge ability verifies sample, including plug and the test circuit who takes the power cord, one end in test circuit's the two inputs is passed through the power cord is connected one in the plug power is participated in, the other end passes through the power cord is connected another in the plug power is participated in, test circuit includes resistance and electric capacity, resistance and electric capacity are parallelly connected, and two parallelly connected ends constitute test circuit's two inputs, test circuit still includes the diode, the diode is established ties in the branch road of resistance place, test circuit is sealed by the non-destructible undetachable structure. The utility model discloses the sample is favorable to standardizing the operation of ability verification activity participant.

Description

Plug discharge capability verification sample of electronic and electrical product

Technical Field

The utility model relates to a technical field is verified to the ability, concretely relates to sample is verified to electron electrical product plug discharge ability.

Background

Capability verification is an activity that uses inter-laboratory alignments to determine the calibration, detection capability of a laboratory or the detection capability of an inspection facility. Capacity verification activities refer to any inter-laboratory alignment and measurement audit used to evaluate laboratory capacity, such as activities performed by a national or regional approval agency or its affiliate, government or industry organization, or other provider of a formal capacity verification plan.

The performance verification activities are carried out, and have positive effects on related aspects related to detection or calibration. For the laboratory, it is the need to meet the ISO/IEC 17025 standard, perform internal quality control and external capability certification; for the accreditation institution, is an important technical approach to evaluate the accreditation laboratory testing or calibration capability; for the clients of the laboratory, the method is an important basis for proving that the laboratory has certain detection capability; for government authorities, the method is an effective measure for supervising laboratory capacity and level. Therefore, at present, the ability verification activities are receiving wide attention both internationally and domestically.

The plug discharge test project of the electronic and electric products requires that an instrument (such as an oscilloscope) which does not have obvious influence on the measured value is used for measuring the residual voltage of the tested sample after the power supply is cut off. The specific requirements are as follows: the product is supplied with a 220V (alternating current) power supply, the product is disconnected from the power supply when the voltage is peak, and then the residual voltage value of the whole second of disconnecting the power supplies for 1s, 2s and the like is read as the plug discharge value of the tested sample. The traditional capability verification sample can be directly measured by a measuring instrument like a universal meter and the like to obtain the accurate resistance value and the capacitance, and a capability verification participant can automatically verify whether the test result is accurate by using a discharge theoretical value after the sample is tested by using a plug discharge tester. Therefore, when partial participants verify the plug discharging capability, the operation is not carried out according to the operation instruction, and the data verification is carried out by other methods which do not meet the standard requirement, so that the partial participants pass the capability verification test. This is not in line with the original intention of the competency verification activity.

Fig. 1 is a schematic circuit diagram of a conventional plug sample.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a capability verification sample of novel structure, this sample can avoid participant's non-standard operation.

The utility model discloses a following technical scheme realizes its invention purpose: a plug discharge capability verification sample of an electronic and electric product comprises a plug with a power line and a test circuit, wherein one end of two input ends of the test circuit is connected with one of plug power pins through the power line, the other end of the test circuit is connected with the other plug power pin through the power line, the test circuit comprises a resistor and a capacitor, the resistor and the capacitor are connected in parallel, and the two parallel ends form two input ends of the test circuit.

The utility model discloses a diode is gone into to the resistance cluster, makes it become a non-pure resistive circuit, makes the participant can not measure its resistance value with similar equipment such as universal meter, and can only adopt the plug tester that discharges to test according to the standard requirement, so, the utility model discloses the sample is favorable to the operation of standard ability verification activity participant.

As the improvement scheme of the utility model:

the test circuit further comprises a second resistance branch circuit, the first resistance branch circuit is connected with the second resistance branch circuit in parallel, the second resistance branch circuit is formed by connecting a resistor and a diode in series, and the direction of the diode in the branch circuit is opposite to that of the diode in the first resistance branch circuit.

The single resistance branch road makes can only obtain positive peak data or negative peak data through the sample, the utility model discloses set up the double resistance branch road, and the diode is reverse in the double resistance branch road, makes and passes through the utility model discloses the sample both can obtain positive peak data, also can obtain negative peak data.

As a further improvement of the utility model:

and the resistance values of the resistors in the first resistor branch and the second resistor branch are different.

Therefore, the resistance values of the discharge circuit of the positive half-wave and the discharge circuit of the negative half-wave of the capacitor in the test circuit are different, whether the residual voltage of the plug tested by the participant is considered comprehensively can be checked, and meanwhile the participant can be prevented from communicating data.

The nondestructive undetachable structure adopts a box-shaped shell, and all parts of the shell are made of the same material, so that the condition that the sample temperature is uneven due to different heat conduction coefficients among different materials is avoided, and the interference on verification data is avoided.

Has the advantages that:

1) the sample of the utility model can not obtain results by using a universal meter and other similar devices, so that the participant of the capability verification activity can only use the plug discharge tester to test, therefore, the sample of the embodiment is beneficial to standardizing the operation of the participant of the capability verification activity;

2) the sample of the utility model can obtain the positive peak value data and the negative peak value data;

3) the utility model discloses the discharge circuit of the positive half-wave of electric capacity is different with the discharge circuit resistance of the negative half-wave among the test circuit, and whether the plug residual voltage that can examine the participant test considers comprehensively can prevent the participant to collude the data simultaneously.

Drawings

Fig. 1 is a schematic circuit diagram of a conventional plug sample.

FIG. 2 is a schematic overall structure diagram according to the first embodiment;

FIG. 3 is a schematic circuit diagram of an internal circuit according to the first embodiment;

fig. 4 is a schematic circuit diagram of an internal circuit according to a second embodiment.

Detailed Description

As shown in fig. 2, the electrician electronic product plug discharging capability verification sample of the present embodiment includes a plug a for connecting a power supply, which has pins 1 and 2, which are also residual voltage measuring terminals, a housing b, and a cable c. The side of the shell b is printed with a sample name and a unique number.

All parts of the shell in the embodiment are made of the same material, so that the interference of different materials with different heat conduction coefficients to test data due to temperature difference is avoided.

Fig. 3 is a schematic circuit diagram of the internal circuit of the sample case according to the present embodiment. The sample circuit comprises a power supply connection terminal 3 connected with a pin 1 in the figure 1 through a cable c, a power supply connection terminal 4 connected with a pin 2 in the figure 1 through a cable c, and a capacitor 5, a diode 6, a resistor 7, a diode 8 and a resistor 9 which are connected in a manner shown in the figure. In this embodiment, the two resistors have the same resistance.

When testing the residual voltage between the pins 1 and 2, if the positive peak value of the capacitor 5 discharges, the discharging loop is a capacitor 5-a diode 8-a resistor 9; if the negative peak of the capacitor 5 is discharged, the discharge loop is capacitor 5-resistor 7-diode 6.

The shell b of the embodiment adopts a non-destructive and non-detachable closed structure, and the internal circuit of the shell b is externally connected with a power line with a plug so as to be connected with a power supply, thereby preventing the ability verification activity participant from knowing the circuit design of the sample. In other embodiments, the internal circuit of the sample can be encapsulated in a material such as resin, and the like, and the similar effect can be achieved.

In this embodiment, two resistor circuits are provided and connected in reverse parallel to the diodes, so that the sample can obtain both positive peak data and negative peak data, and the plug does not need polarity splitting. In addition, because the resistance circuit is connected with a diode in series, the resistance circuit is a non-pure resistance circuit, so that a participant can not measure the resistance value by using a multimeter or the like, and can only use a plug discharge tester to carry out the test according to the standard requirements. It can be seen that the sample embodiment facilitates the operation of participants in the normative ability verification activity.

The specific steps for completing the plug discharge capacity verification test by using the sample in the embodiment are as follows:

1) pretreatment: before the test, according to the standard requirement, the sample needs to be placed in a reliable environment with the constant temperature of 20 +/-5 ℃ and the relative humidity of 45-75% for pretreatment for a certain time, so that the sample and the environment reach thermal equilibrium;

2) after the sample reaches a thermal stability state specified by a standard, a plug discharge tester loads a test power supply on the 1 and 2 ends of the pin, then the power supply is cut off through a plug disconnecting device, and finally an oscilloscope records the residual voltage value of the plug at the time of 1s, 2s and the like, wherein the unit is V, and one bit behind the decimal point is reserved.

In the test process, a test connection picture, a picture of a test device which is well debugged (an applied voltage value and test time) and a picture of a final plug discharge value are required to be taken and submitted together as an investigation file of the capacity verification activity.

Example two

The difference between the second embodiment and the first embodiment is that the schematic diagram of the internal circuit thereof is shown in fig. 4.

Compared with the first embodiment, the sample of the embodiment can only obtain positive peak data or negative peak data, but does not influence the capability verification result.

EXAMPLE III

The third embodiment is different from the first embodiment in that the two resistors have different resistances. Therefore, the resistance values of the discharge circuit of the positive half-wave and the discharge circuit of the negative half-wave of the capacitor 5 are different, whether the residual voltage of the plug tested by the participant is considered comprehensively can be checked, and meanwhile, the participant can be prevented from communicating data.

Claims (4)

1. A plug discharge capability verification sample of an electronic and electric product comprises a plug with a power line and a test circuit, wherein one end of two input ends of the test circuit is connected with one of plug power pins through the power line, the other end of the test circuit is connected with the other plug power pin through the power line, the test circuit comprises a resistor and a capacitor, the resistor and the capacitor are connected in parallel, and the two parallel ends form two input ends of the test circuit.

2. The capability verification sample according to claim 1, wherein the series circuit of the upper resistor and the diode is a first resistor branch, the test circuit further comprises a second resistor branch, the first resistor branch is connected in parallel with the second resistor branch, the second resistor branch is also formed by connecting a resistor and a diode in series, and the diode in the branch is opposite to the diode in the first resistor branch.

3. The capability verification sample according to claim 2, wherein the resistances of the resistors in the first and second resistive branches are different.

4. The capability verification sample according to claim 3, wherein the nondestructive non-detachable structure is a case of a box structure, each part of which is made of the same material.

Images