SENSOR ASSEMBLY, SENSOR CONTROLLER AND CURRENT-MEASURING CIRCUIT

• US 20120262151A1
• Filed: 04/16/2012
• Published: 10/18/2012
• Est. Priority Date: 04/15/2011
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: MAGNA E-Car Systems GmbH & Co. OG (Magna International Incorporated)
• Inventors: MANDIC, Renato, PLANK, Roland, POSCHARNIG, Guido
• Granted Patent: US 9,234,919 B2
• Time in Patent Office: Days
• US Class Current: 324/113
• CPC Class Codes: G01R 1/203 Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R
• CPC Class Codes: G01R 15/20 using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
• CPC Class Codes: G01R 19/0092 measuring current only all subgroups of G01R19/00 take precedence
• CPC Class Codes: G01R 19/25 using digital measurement techniques

Abstract

A sensor assembly for measuring an intensity of a current includes a first sensor apparatus configured to record an intensity of the electrical current with contact, a second sensor apparatus configured to record an intensity of the electrical current, the second sensor apparatus having a common measurement range with the first sensor apparatus, and a first analog-digital converter configured to convert analog measured values into digitized measured values. The first sensor apparatus, the second sensor apparatus and the first analog-digital converter are arranged on a common circuit carrier.

Claims

1. A sensor assembly which measures an intensity of an electrical current flowing through a conductor, the sensor assembly comprising:

a first sensor apparatus configured to record an intensity of the electrical current with contact;

a second sensor apparatus configured to record an intensity of the electrical current, the second sensor apparatus having a common measurement range with the first sensor apparatus; and

a first analog-digital converter configured to convert analog measured values from the first sensor apparatus into digitized measured values, wherein the first sensor apparatus, the second sensor apparatus and the first analog-digital converter are arranged on a common circuit carrier.

2. The sensor assembly of claim 1, wherein the common circuit carrier comprises a circuit board with at least one of a printed circuit, a thick-film circuit and a thin-film circuit.

3. The sensor assembly of claim 1, further comprising:

a first power supply for the first sensor apparatus; and

a second power supply for the second sensor apparatus.

4. The sensor assembly of claim 3, wherein the first power supply circuit is electrically insulated from the second power supply circuit.

5. The sensor assembly of claim 1, wherein the second sensor apparatus is configured to record the intensity of the electrical current in a contact-free manner.

6. The sensor assembly of claim 5, wherein the second sensor apparatus comprises a sensor having a magneto-resistive effect.

7. The sensor assembly of claim 1, further comprising a connection configured to output the measured values recorded by the second sensor apparatus in analog form.

8. A current-measuring circuit comprising:

a sensor assembly including;

a first sensor apparatus configured to measure an intensity of an electrical current;

a second sensor apparatus configured to measure an intensity of the electrical current; and

a first analog-digital converter operatively connected to the first sensor apparatus and configured to convert the analog measured values of the first sensor apparatus into digitized measured values; and

a sensor controller operatively connected to the sensor assembly and including a microcontroller configured to evaluate the measured values from the first sensor apparatus and the second sensor apparatus and control a power supply based on the measured values.

9. The current-measuring circuit of claim 8, wherein the sensor controller further comprises:

a second analog-digital converter operatively connected to the second sensor apparatus and configured to convert analog measured values of the second sensor apparatus into digitized measured values; and

a digital value comparator operatively connected to the first analog-digital converter and the second analog-digital converter and configured to compare the digitized measured values of the first sensor apparatus and the second sensor apparatus.

10. The current-measuring circuit of claim 8, wherein the sensor controller further comprises:

a digital-analog converter operatively connected to the first analog-digital converter and configured to convert digital measured values of the first sensor apparatus into analog measured values; and

an analog value comparator operatively connected to the digital-analog converter and the second sensor apparatus and configured to compare the analog measured values of the first sensor apparatus and the second sensor apparatus.

11. The current-measuring circuit of claim 8, wherein signals of the analog measured values of the second sensor apparatus are transmitted to the sensor controller via an analog line.

12. The current-measuring circuit of claim 11, further comprising a screen provided on the analog line,

13. The current-measuring circuit of claim 8, further comprising a shunt, wherein a voltage drop across the shunt is tapped off at two separate locations using a first contact and a second contact and supplied to the first analog-digital converter.

14. The current-measuring circuit of claim 8, wherein the second sensor apparatus is electrically insulated from the first sensor apparatus.

15. An on-board circuit comprising:

a current source;

an electrical load configured to receive an electric current from the current source;

a power supply disconnection apparatus operatively connected and provided between e current source and the electrical load;

a current-measuring circuit operatively connected to the current source and the power supply disconnection apparatus, the current-measuring circuit including;

a sensor assembly having a first sensor apparatus configured to measure an intensity of an electrical current, a second sensor apparatus configured to measure an intensity of the electrical current, and a first analog-digital converter operatively connected to the first sensor apparatus and configured to convert the analog measured values of the first sensor apparatus into digitized measured values; and

a sensor controller operatively connected to the sensor assembly and including a microcontroller configured to evaluate the measured values from the first sensor apparatus and the second sensor apparatus and one of close and open the circuit between the current source and the electrical load.

16. The on-board circuit of claim 15, wherein the sensor controller further comprises:

a second analog-digital converter operatively connected to the second sensor apparatus and configured to convert analog measured values of the second sensor apparatus into digitized measured values; and

a digital value comparator operatively connected to the first analog-digital converter and the second analog-digital converter and configured to compare the digitized measured values of the first sensor apparatus and the second sensor apparatus,

17. The on-board circuit of claim 15, wherein the sensor controller further comprises:

a digital-analog converter operatively connected to the first analog-digital converter and configured to convert digital measured values of the first sensor apparatus into analog measured values; and

an analog value comparator operatively connected to the digital-analog converter and the second sensor apparatus and configured to compare the analog measured values of the first sensor apparatus and the second sensor apparatus,

18. The on-board circuit of claim 15, wherein signals of the analog measured values of the second sensor apparatus are transmitted to the sensor controller via an analog line,

19. The on-board circuit of claim 18, further comprising a screen provide on the analog line,

20. The on-board circuit of claim 15, wherein the second sensor apparatus is electrically insulated from the first sensor apparatus.