Thermal measurement and process control

Patent metadata

Field	Value
Publication number	US-10602759-B2
Application number	US-201615181341-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Dec 21, 2012
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

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).

First claim

The invention claimed is:

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 s

Assignees

• John Bean Technologies Corp

Inventors

• Hocker Jon A
• Strong John R
• Gunawardena Ramesh M
• Stockard Richard D

Classifications

• G01N33/12

  Meat; Fish · CPC title

• B65G15/00

  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 title

• G01N33/02

  Food · CPC title

• B65G15/50

  Endless load-carriers consisting of a series of parallel ropes or belt strips · CPC title

• A23V2002/00

  Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title