ENCODED INFORMATION READING TERMINAL WITH REPLACEABLE IMAGING ASSEMBLY

• US 20150136854A1
• Filed: 05/08/2012
• Published: 05/21/2015
• Est. Priority Date: 05/08/2012
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Lu, Jun, Tao, Xi, Wang, Ynjiun Paul, Liu, Young, Chen, Feng
• Granted Patent: US 9,098,763 B2
• Time in Patent Office: Days
• US Class Current: 235/462.27
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 7/10009 sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10851 Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device basic electronic circuitry H03
• CPC Class Codes: G06K 7/1413 1D bar codes
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• CPC Class Codes: H04N 23/66 Remote control of cameras or camera parts, e.g. by remote control devices
• CPC Class Codes: H04N 25/53 Control of the integration time
• CPC Class Codes: H04N 25/75 Circuitry for providing, modifying or processing image signals from the pixel array

Abstract

An encoded information reading (EIR) terminal can comprise a microprocessor communicatively coupled to a system bus, a memory, a communication interface, and a pluggable imaging assembly identified by a type identifier and configured to acquire an image comprising decodable indicia. The imaging assembly can comprise a two-dimensional image sensor configured to output an analog signal representative of the light reflected by an object located within the field of view of the imaging assembly. The EIR terminal can be configured to output, by processing the analog signal, the raw image data derived from the analog signal and/or a decoded message corresponding to the decodable indicia. The imaging assembly can be communicatively coupled to the system bus via an imaging assembly interface comprising a plurality of wires and a multi-pin connector. The imaging assembly inter face can comprise one or more wires configured to carry the imaging assembly type identifier. The EIR terminal can be configured, responsive to receiving the type identifier via the one or more wires, to retrieve from the memory one or more imaging assembly configuration information items corresponding to the type identifier and/or to receive via the communication interface one or more imaging assembly configuration information items corresponding to the type identifier. The EIR terminal can be further configured to control the imaging assembly using the imaging assembly configuration information items.

Claims

1. An encoded information reading (EIR) terminal comprising:

a microprocessor communicatively coupled to a system bus;

a memory;

a communication interface;

a pluggable imaging assembly identified by a type identifier and configured to acquire an image comprising decodable indicia, said imaging assembly comprising a two-dimensional image sensor configured to output an analog signal representative of light reflected by an object located within a field of view of said imaging assembly;

wherein said EIR terminal is configured to output, by processing said analog signal, at least one of;

raw image data derived from said analog signal, a decoded message corresponding to said decodable indicia;

wherein said imaging assembly is communicatively coupled to said system bus via an imaging assembly interface comprising a plurality of wires and a multi-pin connector;

wherein said imaging assembly interface comprises one or more wires configured to carry said type identifier;

wherein said EIR terminal is configured, responsive to receiving said type identifier via said one or more wires, to perform at least one of;

retrieving from said memory one or more imaging assembly configuration information items corresponding to said type identifier, receiving via said communication interface one or more imaging assembly configuration information items corresponding to said type identifier; and

wherein said EIR terminal is further configured to control said imaging assembly using said one or more imaging assembly configuration information items.

2. The EIR terminal of claim 1, wherein said decoded message comprises at least one of:

one or more printable characters, one or more non-printable characters.

3. The EIR terminal of claim 1, wherein said imaging assembly further comprises an analog-to-digital (A/D) converter configured to convert said analog signal into a digital signal, an amplifier configured to output an amplified analog signal by amplifying an analog signal read out of said image sensor, and a control circuit configured to control said imaging assembly.

4. The EIR terminal of claim 1, further configured to receive said type identifier via said one or more wires responsive to detecting one of:

a power up event, an imaging assembly connection event.

5. The EIR terminal of claim 1, wherein said one or more wires configured to carry said type identifier are provided by an i2c interface.

6. The EIR terminal of claim 1, wherein said imaging assembly configuration items comprise at least one of:

a power-up sequence of said two-dimensional image sensor, a format of data outputted by said two-dimensional image sensor, a number of pixels comprised by said two-dimensional image sensor, an exposure mode of said two-dimensional image sensor, configurations of one or more control registers of said two-dimensional image sensor.

7. The EIR terminal of claim 1, wherein said memory is provided by at least one of:

a volatile memory, a non-volatile memory.

8. The EIR terminal of claim 1, wherein said communication interface is provided by one of:

a wired communication interface, a wireless communication interface.

9. The EIR terminal of claim 1, further configured to store said one or more imaging assembly configuration items in a memory file comprising one or more records, each record comprising an image sensor type, at least one parameter identifier, and at least one parameter value.

10. A method of controlling an imaging assembly by an EIR terminal comprising a microprocessor, a memory, a communication interface, and a pluggable imaging assembly communicatively coupled to said system bus via an imaging assembly interface comprising a plurality of wires and a multi-pin connector, said imaging assembly comprising a two-dimensional image sensor, said imaging assembly identified by a type identifier and configured to acquire an image comprising decodable indicia, said method comprising the steps of:

responsive to one of a power up event and an imaging assembly connection event, receiving said type identifier via said imaging assembly interface;

performing at least one of;

retrieving from said memory one or more imaging assembly configuration information items corresponding to said type identifier, receiving via said communication interface one or more imaging assembly configuration information items corresponding to said type identifier;

controlling said imaging assembly using said one or more imaging assembly configuration information items;

responsive to receiving an analog signal outputted by said imaging assembly, converting said analog signal into a digital signal;

outputting, by processing said digital signal, at least one of;

raw image data derived from said analog signal, a decoded message corresponding to said decodable indicia.

11. The EIR method of claim 10, wherein said decoded message comprises at least one of:

one or more printable characters, one or more non-printable characters.

12. The EIR method of claim 10, wherein said imaging assembly further comprises an analog-to-digital (A/D) converter configured to convert said analog signal into a digital signal, an amplifier configured to output an amplified analog signal by amplifying an analog signal read out of said image sensor, and a control circuit configured to control said imaging assembly.

13. The EIR method of claim 10, wherein said imaging assembly configuration items comprise at least one of:

a power-up sequence of said two-dimensional image sensor, a format of data outputted by said two-dimensional image sensor, a number of pixels comprised by said two-dimensional image sensor, an exposure mode of said two-dimensional image sensor, configurations of one or more control registers of said two-dimensional image sensor.

14. The EIR method of claim 10, wherein said memory is provided by at least one of:

a volatile memory, a non-volatile memory.

15. The EIR method of claim 10, wherein said communication interface is provided by one of:

a wired communication interface, a wireless communication interface.

16. The EIR method of claim 10, further comprising the step of storing said one or more imaging assembly configuration items in a memory file comprising one or more records, each record comprising an image sensor type, at least one parameter identifier, and at least one parameter value.