SU1652949A1 - Device for measuring parameters of linear integral voltage stabilizer - Google Patents

Description

The invention relates to measuring equipment and can be used for automated measurement of electrical parameters (in particular, the instability coefficient) of linear integrated voltage stabilizers (LIN) at the operational, output and input control.

The purpose of the invention is improving accuracy by measuring at the limit of the ADC, providing the greatest measurement accuracy and speed by eliminating the operation of selecting the output voltage of the LIN.

The drawing shows a structural diagram of the device.

The device comprises a mode setting unit 1, an electronic computer (computer) 2, channel 3, terminal 4 for connecting the input of the monitoring object, terminal 5 for connecting the output of the monitoring object, controller 6, measuring unit 7, containing a voltage reference source (ION) 8 , switch 9, analog-to-digital converter (ADC) 10, terminal 11 for connecting the control input of the control object. The mode setting unit 1 comprises a voltage source 12 and a current source 13. The drawing also shows the object 14 of the control (LIN).

The first and second outputs of the mode setting unit 1 are connected respectively to terminals 4 and 5 for connecting the input and output of the monitoring object 14. The first input of the switch 9 is connected to the first input of the measuring unit 7, with the first output of the controller 6 and the second output of the mode setting unit 1, and the first output is connected to the first input of the ADC 10. The second input of the measuring unit 7 is connected to the first output of the reference voltage source 8 and the third output of block 1 job mode. Through channel 3, the input / output of the computer 2 is connected to the corresponding inputs of the mode setting unit 1. the measuring unit 7 and the first input of the controller 6. The second input of the controller 6 is connected to the terminal 11 for connecting the control input of the object 14 of the control. The second input of the switch 9 is connected to the first output of the reference voltage source 8, the second output of which is connected to the third input of the switch 9, the second output of which is connected to the second input of the ADC 10.

A device for measuring parameters LIN is as follows.

The process of measuring the electrical parameters of the LIN consists of several stages.

At the first stage, the output voltage of LIN 14 is set. For this, the necessary state of controller 6, which is a programmable divider, is set. The required transfer coefficient of the divider K is calculated by the well-known formula where U _O n ~ is the voltage of the internal voltage reference source LIN;

Tsvykh - installed output voltage LIN.

Then, Ubx is applied to terminal 4. ·! voltage source 12, and at terminal 5 the output voltage of LIN 14 C _V output is set. 1. The switch 9 is set to a mode in which its first, second inputs are connected respectively to the first, second inputs of the ADC 10, and the third input of the switch 9 is not connected to any of the outputs of the switch 9. The input voltage ADC 10 receives the output voltage Tsvyh.1, which is measured by the ADC 10 and the computer is stored 2. '

At the second stage, according to the measurement results at the first stage, the output voltage of ION 8 is set, which is equal in magnitude and sign to the output voltage Tsvyh. 1. Switch 9 is set mode in which the first input is connected to its first output, its third input is connected to its second output and the second input of the switch 9 is not connected with either of the switch output 9. At the ADC 10 is input the difference _in DC's. 1 of the output voltage Ubux.i LIN 14 and the output voltage of Zion ION 8, which is measured by the ADC 10 and stored by the computer 2.

At the third stage, disturbance is applied to the tested LIN 14: they change the input voltage of the LIN 14 if the voltage instability coefficient is measured, or the output current changes if the current instability coefficient is measured. Changing the input voltage or output current LIN 14 is achieved by changing the operating mode of the voltage source 12 or current source 13. The output voltage LIN 14 will also change, and the more, the worse stabilizing properties LIN 14. Then, the difference is measured again _in DC yh.2 new output voltage U _in and the output voltage yh.2 Zion ION 8 and the result of the computer 2.

ΐ652949

Synchronization and setting the operating modes of the device blocks is carried out

Computer 2 through its channel 3.

According to the measurement results, the computer 2 calculates the instability coefficient 5.

Voltage instability coefficient Cp · is calculated according to the formula _{Ki =.} £ 1 -di Luvyh .. _O 2) 100 _{(% / C)} nd

Ivyh. 1 'I Ubx. 1 ~ Ubx. 2 I (2) where | iv.1 - Ubx.2F the input voltage jump, and the current instability coefficient Κι - 15 according to the formula

Κι = (A Tsvykh. 1 - Δ Tsvykh. 2) · 100 and _{in the} s. 1 'ί 1out. 1 ~ 1out. 2 I (3) where Pvykh. 1 - 1vy.g! - jump in output current. Given that

Divykh.1 ⁼ Ubhx.1 ~ Umoh; (4)

Δ Ubwx.2 · = and _In ex.2 - Uhoh, (5) and substituting (4), (5) in (2). (3) we get

Ki - (· Tsvykh- 1 ~ · ^ out. 2) '100 Ubux. 1 ’I! Out. 1 ~! Out. 2 I (% / B) (6)

P)

By formulas (6) and (7), Ki and K | are calculated.

Claims (1)

Claim A device for measuring the parameters of linear integral voltage stabilizer, containing a mode setting unit, the first and second outputs of which are connected respectively to the terminals for connecting the input and output of the monitoring object, a regulator, a measuring unit containing a reference voltage source, an analog-to-digital converter and a switch, the first input of which connected to the first input of the measuring unit, with the first output of the controller and the second output of the mode setting unit, and the first output with the first input of the analog-to-digital converter to the developer, the second input of the measuring unit is connected to the first output of the reference voltage source and to the third output of the mode setting unit, as well as an electronic computer, the input of which is connected via the interface channel to the corresponding inputs of the mode setting unit, measuring unit and the first input of the controller, the second the input of which is connected to the terminal for connecting the regulatory input of the control object, characterized in that, in order to increase accuracy by measuring at the limit of analog-to-digital To ensure the highest measurement accuracy and speed by eliminating the operation of selecting the output voltage of linear integrated voltage stabilizers, the second input of the switch is connected to the first output of the reference voltage source, the second output of which is connected to the third input of the switch, the second output of which is connected to the second input of analog-digital transducer.