A method and apparatus for automatically measuring and storing a various measured values of an item, or a sequence of measured values of one or more item(s) suitable for single-handed use by a user. In particular, the present invention relates to a mobile computing device with one or more sensors for determining when to measure and record a particular value of one or more items. The mobile computing device may automatically measure the values based on sensing a change in the temperature value or through using proximity as detected by one or more onboard sensors. Additionally, the mobile computing device may automatically measure the values based on coming within range of an external proximity device. In response to automatically measuring the values, the measured values are stored along with additional information for record keeping purposes.

Provided is a data logger. A data logger includes a sensor configured to sense a change in a gravitational acceleration of the data logger and a change in a rotation angle of the data logger, and generate a sensing signal, a communication module configured to receive configuration information including a sensing period and threshold values of the data logger from a portable reader, and a microprocessor unit configured to receive the sensing signal from the sensor, receive the sensing period and the threshold values from the communication module, generate sensing values corresponding to the sensing signal, compare the sensing values with the threshold values, determine whether an abnormal state occurs in the data logger according to a result of the comparison, generate and transmit to a server normal log information at each of the sensing period when the abnormal state does not occur in the data logger, and generate and transmit to the server abnormal log information whenever the abnormal state occurs regardless of the sensing period.

Provided is a data logger. A data logger includes a sensor configured to sense a change in a gravitational acceleration of the data logger and a change in a rotation angle of the data logger, and generate a sensing signal, a communication module configured to receive configuration information including a sensing period and threshold values of the data logger from a portable reader, and a microprocessor unit configured to receive the sensing signal from the sensor, receive the sensing period and the threshold values from the communication module, generate sensing values corresponding to the sensing signal, compare the sensing values with the threshold values, determine whether an abnormal state occurs in the data logger according to a result of the comparison, generate and transmit to a server normal log information at each of the sensing period when the abnormal state does not occur in the data logger, and generate and transmit to the server abnormal log information whenever the abnormal state occurs regardless of the sensing period.

A computer-implemented method for food safety mapping. The method includes acquiring, via a wireless receiver, an encoded unique identifier from a label positioned proximate to a food item. The encoded unique identifier is saved in a food item record of a database. Current food temperature data for the food item is acquired via a temperature sensor and saved in the food item record.

A computer-implemented method for food safety mapping. The method includes acquiring, via a wireless receiver, an encoded unique identifier from a label positioned proximate to a food item. The encoded unique identifier is saved in a food item record of a database. Current food temperature data for the food item is acquired via a temperature sensor and saved in the food item record.

A food hygiene management device according to the present disclosure comprises a core temperature acquisition unit that acquires core temperature information indicating a core temperature of a food, a photograph acquisition unit that acquires photograph data on the food, and a composition unit that generates composed photograph data in which the core temperature information, time information indicating when the core temperature was measured, and the photograph data of the food are displayed.

A food hygiene management device according to the present disclosure comprises a core temperature acquisition unit that acquires core temperature information indicating a core temperature of a food, a photograph acquisition unit that acquires photograph data on the food, and a composition unit that generates composed photograph data in which the core temperature information, time information indicating when the core temperature was measured, and the photograph data of the food are displayed.

A temperature sensor and method of temperature sensing is described. A first reference current is provided to a dual-slope ADC during a first slope time duration of a dual-slope ADC conversion cycle. A second reference current is provided to the dual-slope ADC during a second slope time duration of the dual-slope ADC conversion cycle. A digital codeword corresponding to a ratio of the first and second reference currents is then output by the dual-slope ADC. The first and second reference current ratio is related to the temperature.

A temperature sensor and method of temperature sensing is described. A first reference current is provided to a dual-slope ADC during a first slope time duration of a dual-slope ADC conversion cycle. A second reference current is provided to the dual-slope ADC during a second slope time duration of the dual-slope ADC conversion cycle. A digital codeword corresponding to a ratio of the first and second reference currents is then output by the dual-slope ADC. The first and second reference current ratio is related to the temperature.

A resistance temperature detector includes a single channel analog to digital converter (ADC) comprising a first channel input and a reference voltage input. The detector also includes a resistance temperature detector (RTD) element connected to the first channel input and a current sense element in series with the RTD element. The current sense element is connected to the reference voltage input. The detector also includes a power source connected to the RTD element and a controller configured to: receive an output of the single channel ADC to determine a temperature at the RTD element. The output of the single channel ADC comprises a bit representation of a ratio between a first voltage across the RTD element and a reference voltage across the current sense element.