Thermal measurement and process control

• US 10,602,759 B2
• Filed: 06/13/2016
• Issued: 03/31/2020
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: John Bean Technologies Corporation
• Original Assignee: John Bean Technologies Corporation
• Inventors: Hocker, Jon A., Strong, John R., Gunawardena, Ramesh M., Stockard, Richard D.
• Primary Examiner(s): Caputo, Lisa M
• Assistant Examiner(s): Ahmed, Nasir U.
• Application Number:
  US15/181,341
• Publication Number:
  US 20160286845A1
• Time in Patent Office: 1,387 Days
• Field of Search: None
• CPC Class Codes: A22C 17/008 for measuring quality, e.g. to determine further processing
• CPC Class Codes: A23B 4/005 Preserving by heating
• CPC Class Codes: A23L 3/185 in solid state
• CPC Class Codes: A23V 2002/00 Food compositions, function of food ingredients or processes for food or foodstuffs
• CPC Class Codes: B65G 15/00 Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration having load-conveying surfaces formed by interconnected longitudinal links B65G17/06
• CPC Class Codes: B65G 15/50 Endless load-carriers consisting of a series of parallel ropes or belt strips
• CPC Class Codes: B65G 2201/0202 Agricultural and processed food products
• CPC Class Codes: B65G 47/53 between conveyors which cross one another
• CPC Class Codes: G01K 1/026 arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
• CPC Class Codes: G01K 1/14 Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
• CPC Class Codes: G01K 1/146 arrangements for moving thermometers to or from a measuring position
• CPC Class Codes: G01K 13/00 Thermometers specially adapted for specific purposes
• CPC Class Codes: G01K 13/06 in linear movement
• CPC Class Codes: G01K 13/12 combined with sampling devices for measuring temperatures of samples of materials
• CPC Class Codes: G01K 2207/06 for preparation purposes
• CPC Class Codes: G01N 33/02 Food
• CPC Class Codes: G01N 33/12 Meat; Fish
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/2621 Conveyor, transfert line

Abstract

A thermal processing and control system (300) includes a thermal processing station (312) for receiving food products (14) being carried on a conveyor system (316). A first scanning station (318) is located upstream from the thermal processing station (312) for scanning the food products being carried by the conveyor (316). An actuator (420) automatically connects temperature measuring devices (402) with selected food products (14). A diverter conveyor (324) diverts selected food products (14) from the conveyor (316) to a transverse conveyor (326) for either further processing or alternative processing, depending on how system (300) is configured. The temperature measuring devices (402) are automatically removed from the food products at station (329).

Claims

1. A system for measuring the temperature of food products processed at a thermal processing station under process parameters, comprising:

(a) a conveyance system conveying the food products in a stream through the thermal processing station;

(b) a characterizing system physically characterizing all or some of the food products of the stream being carried by the conveyance system and based on the physical characterization of the food products;

(i) selecting sample food products for temperature measurement, and (ii) determining one or more locations on the selected sample food products that are expected to give a representative temperature at which to measure the internal temperature of the selected sample food products;

(c) temperature sensing devices to be inserted into food products to travel with the food products through the thermal processing station to monitor the temperature of the food product during the thermal processing of the food product;

(d) a powered multi-axis system inserting the temperature sensing devices into the selected sample food products at the selected locations on the sample food products that are expected to give a representative temperature of the sample food products as the selected sample food products are carried by the conveyance system at a location upstream of the thermal processing station, and wherein once the temperature sensing devices are inserted into the sample food products, the powered system is detached from the temperature sensing devices; and

(e) temperature monitoring devices monitoring the temperatures sensed by the temperature sensing devices that have been inserted into the sample food products, including during the thermal processing of the selected sample food products.

2. The system according to claim 1, wherein the powered system for inserting the temperature sensing devices into the selected sample food products comprises an actuator adapted to carry the temperature sensing devices in the selected sample food products and place the temperature sensing devices at selected locations on the selected sample food products.

3. The system according to claim 2, wherein the actuator is selected from the group consisting of:

(a) an actuator capable of moving over the food products being conveyed by the conveyance system;

(b) a multi-directional actuator capable of moving at least along, across, and diagonally relative to the conveyance system; and

(c) an actuator rotatably mounted along the conveyance system and capable of extending and retracting in length.

4. The system according to claim 1, further comprising a control system controlling the operation of the thermal processing station based on the temperatures measured by the temperature sensing devices.

5. The system according to claim 1, wherein:

the temperature sensing devices are mounted at selected positions along the conveyance system; and

the powered system places the selected sample food products on such positioned temperature sensing devices.

6. The system according to claim 5, further comprising a control system controlling the operation of the thermal processing station based on the temperatures measured by the temperature sensing devices.

7. The system according to claim 6, wherein:

(a) the control system operates the thermal processing station under selected parameters based on the results of the temperatures measured by the temperature sensing devices; and

(b) the control system adjusting the operational parameters of the thermal processing station.

8. The system according to claim 7, wherein the parameters under which the thermal processing station is operated by the control system are selected from the group consisting of:

(a) the time that the food products remain in the thermal processing station;

(b) the humidity of the atmosphere in the thermal processing station;

(c) the temperature of the heat transfer medium used in the thermal processing station to thermally process the food products;

(d) the volume of the food products within the thermal processing station;

(e) the mass of the food products within the thermal processing station;

(f) the air velocity throughout the thermal processing station; and

(g) the operation of a heating or cooling system used to heat or cool the heat transfer medium used in the thermal processing station to thermally process the food products.

9. The system according to claim 6, further comprising a scanner for scanning the food products to physically characterize the food products.

10. The system according to claim 6:

further comprising a diverter for diverting the food products from the food product stream; and

wherein operation of the diverter is controlled by the control system to divert the food products from the food product stream if the temperatures of the sample food products, measured by the temperature sensing devices, indicates that the thermal processing of the food products has not been satisfactorily completed.

11. The system according to claim 1, further comprising a data processing system modeling the thermal processing station and based on the modeled/thermal processing station, effecting the operation of the thermal processing station.

12. The system according to claim 11, wherein the data processing system determining the extent that the food products have been thermally processed based on the temperatures of the food products measured by the temperature sensing devices.

13. The system according to claim 12, wherein the data processing station determines the level of thermal processing of the food products by:

(a) ascertaining the threshold minimum temperatures of the selected sample food products that have been reached; and

/or

(b) determining the reduction in one or more selected bacteria resulting from the thermal processing of the selected sample food products.

14. The system according to claim 11, wherein the data processing system based on the temperatures of the sample food products measured by the temperature sensing devices, determining if regulatory requirements for sufficient processing of the selected food products have occurred.

15. The system according to claim 14, wherein the regulatory requirements that must be met for sufficient processing of the food products include achieving a minimum temperature throughout the entire volume of the food products or achieving a reduction in the presence of one or more specific bacteria in the food products.

16. The system according to claim 11, wherein the modeling of the temperature measurement system takes into consideration one or more factors selected from the group consisting of the type of the food product, the density of the food product, the thickness range of the food product, initial temperature of the food product, the latent heat of the food product, the fat content of the food product, the moisture content of the food product, the loading level of the food product on the conveyance system, the speed of the conveyance system, the dwell time of the food product within the thermal processing station, the level of power transmitted to the thermal processing station, the temperature within the thermal processing station, variations of temperature at different locations within the thermal processing station, the moisture level of the heat transfer medium used within the thermal processing station, the rate of air circulation within the food processing station, and the volume of air circulation within the thermal processing station.

17. The system according to claim 1, wherein the characterizing system comprises a scanner for scanning the food products.

18. The system according to claim 1, wherein the location on the sample food products expected to give a representative temperature of the food products is selected from the centroid, center of mass, and center of thickness location of the sample food products.

19. A system for measuring the temperature of food products processed at a thermal processing station under process parameters, comprising:

(a) a conveyance system conveying the food products in a stream through the thermal processing station;

(b) a scanner scanning the food products to physically characterize the food products being carried by the conveyance system;

(c) a data processing system selecting sample food products for temperature measurement based on the results of the scanning of the food products and determining one or more locations on the selected sample food products expected to give a representative temperature of the food products at which to take temperature measurements;

(d) temperature sensing devices to be inserted into food products and travel with the food products on the conveyance system to monitor the temperature of the food product during the thermal processing of the food product;

(e) a powered multi-axis system inserting the temperature sensing devices into the selected sample food products at the one or more determined locations on the sample food product expected to give a representative temperature of the selected sample food products, and wherein once the temperature sensing devices are inserted into the food products, the powered system is detached from the temperature sensing devices; and

(f) a temperature measuring device for monitoring the temperatures sensed by the temperature sensing devices, including during the thermal processing of the selected sample food products.

20. The system according to claim 19, further comprising a control system controlling the operation of a thermal processing station based on the temperatures measured by the temperature sensing devices.

21. The system according to claim 19, wherein the data processing system modeling the thermal processing station and based on the modeled/thermal processing station, effecting the operation of the thermal processing station.

22. The system according to claim 19, wherein the location on the sample food products expected to give a representative temperature of the food products is selected from the centroid, center of mass, and center of thickness location of the sample food products.