# US 9,520,059 B2 · Method for a deterministic selection of a sensor from a plurality of sensors

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- Number: US 9,520,059 B2
- Document ID: US9520059B2
- Status: Granted
- Kind: B2
- Application number: 15/052,311
- Filed: 2016-02-24
- Published: 2016-08-25
- Granted: 2016-12-13
- Earliest claimed: 2015-02-24
- Assignees: Micronas GmbH
- Applicants: Micronas GmbH
- Inventors: Eckart Wagner; Thilo Rubehn
- Web page: https://patentgrep.com/patent/US9520059B2

## CPC

- G08C 19/16: in which transmission is by pulses
- H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- G08C: TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmitting systems F15B; mechanical means for transferring the output of a sensing member into a different variable G01D5/00; mechanical control systems G05G)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

Method for a deterministic selection of a sensor from a plurality of sensors, having a control unit and multiple sensors connected to the control unit by means of a three-wire bus, wherein the sensors are connected parallel to one another at a three-wire bus by at least two lines and a protocol frame according to SENT specification is used between the control unit and the sensors for a data exchange, and within the protocol frame a specified sensor is selected from a plurality of sensors by means of a selection signal sent by the control unit, wherein each sensor is associated with an unambiguous number of pulses for the selection of the sensor, and the selection of the sensor is performed by means of the selection signal having a predetermined number of pulses occurring immediately in succession.

## Claims

### Claim 1

A method for a deterministic selection of a sensor from a plurality of sensors, the method comprising:
connecting a control unit and at least two sensors to the control unit via a three-wire bus, the sensors being connected parallel to one another by at least two lines of the three-wire bus;
using, between the control unit and the at least two sensors, a protocol frame according to SENT specifications for a data exchange;
selecting, within the protocol frame, a specific sensor from the at least sensors via a selection signal sent by the control unit; and
associating, for the selection of the sensor, the at least two sensors are associated with an unambiguous number of pulses and the selection of a sensor is performed via the selection signal having a predetermined number of pulses occurring immediately in succession.

### Claim 2 (depends on 1)

The method according to claim 1, wherein between two successive pulses only a single high signal level state is formed.

### Claim 3 (depends on 1)

The method according to claim 1, wherein after the selection signal, a pause signal is sent by the control unit or the at least two sensors.

### Claim 4 (depends on 3)

The method according to claim 3, wherein via the control unit, the selection signal and the pause signal are transmitted as part of a request signal.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the time interval between two pulses is at least one micro second.

### Claim 6 (depends on 1)

The method according to claim 1, wherein all pulses of the selection signal have the same predetermined duration.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the duration between a falling edge and a rising edge of a pulse is selected to be between one micro second and eight micro seconds.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the number of pulses is greater than or equal to one.

### Claim 9 (depends on 1)

The method according to claim 1, wherein each of the at least two sensors are controlled by a dedicated supply voltage line.