Shopping Cart BLE Tracking for Privacy-Conscious Media Measurement

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Solution Overview

Problem

Retail stores face challenges in accurately measuring in-store media exposure due to privacy concerns and high costs associated with existing tracking technologies like cell phone geolocation and RFID, which require customer opt-in and involve invasive digital screens, leading to low data capture rates and increased expenses.

Innovation Solution

Implementing Bluetooth Low Energy (BLE) emitting devices on shopping carts to track cart locations in relation to advertising displays, combined with customer identification data from loyalty cards at checkout, to measure the effectiveness of in-store advertising without requiring customer opt-in, using a central computer to associate and analyze data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If cell phone geolocation tracking is used to measure in-store media exposure, then individual consumer level data can be obtained, but customer opt-in is required which lowers data capture rate

Engineering Contradiction:
Improveindividual consumer level dataVSAvoiddata capture rate
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The patent uses shopping carts as intermediary devices that automatically track customer location and advertising exposure without requiring direct customer participation or opt-in. The cart serves as a mediator between the customer and the tracking system, capturing data passively while the customer shops.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system enables self-service tracking where the shopping cart automatically monitors its own location and the advertisements customers are exposed to without requiring customer action. The cart's embedded device continuously collects and transmits location data autonomously.

Inventive Principle:
Principle #25Self-service

2Measurement precision

If RFID tracking of shopping carts is used, then cart location can be monitored, but sufficient information to measure media effectiveness is not obtained

Engineering Contradiction:
Improvecart location monitoringVSAvoidmedia effectiveness measurement information
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent combines RFID cart tracking with digital advertising display data and point-of-sale purchase information into a unified measurement system. By merging these three data sources, the system captures not only location but also advertising exposure and actual purchasing behavior, enabling comprehensive media effectiveness measurement.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system creates a multi-functional tracking platform that simultaneously monitors cart location, tracks advertising impressions, records purchase data, and measures media effectiveness. This universal system replaces multiple separate functions with a single integrated solution.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If digital screens are installed on every shopping cart for targeted messaging, then individualized advertising can be delivered, but upfront costs and upkeep expenses increase significantly

Engineering Contradiction:
Improvetargeted messaging capabilityVSAvoidcost of digital screens and upkeep
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Instead of installing physical digital screens on every cart, the patent uses the cart's RFID device to receive and display advertising information wirelessly. The advertising content is transmitted electronically to the cart, creating a virtual copy of the ad experience without the physical hardware costs of actual screens.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces the mechanical/digital screen system with a wireless communication system. Instead of physical displays requiring power, hardware, and maintenance, the system uses RFID and wireless data transmission to deliver targeted advertising content to the cart.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Measurement precision

If invasive tracking technologies are used to gather personal location data, then detailed consumer behavior can be measured, but privacy concerns and regulatory compliance issues arise

Engineering Contradiction:
Improveconsumer behavior measurementVSAvoidprivacy concerns and regulatory compliance
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the traditional tracking model by having the cart track the customer rather than the customer's device tracking the cart. This reversal allows the retailer to control the data collection process entirely, gathering only the specific information needed for advertising measurement while maintaining privacy compliance.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The system extracts only the specific data elements needed for advertising measurement (cart location, advertising impressions, purchase data) without capturing broader personal information. By taking out only the necessary data points, the system achieves measurement precision while minimizing privacy concerns.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS20250232332A1Systems and methods for measuring in-store media exposure
Publication Date: 2025.07.17 THE KROGER CO
  • US20250232332A1 patent drawing
  • US20250232332A1 patent drawing
  • US20250232332A1 patent drawing

AI summary

A method for measuring in-store media exposure includes an initial step of providing a cart to a customer and that includes an emitting device. As the customer moves the cart around a store, which also includes a plurality of advertising displays, cart location data is collected. At a point of sale terminal or checkout locations, customer identification data is obtained from the customer and is associated with the cart location data to thereby measure an effectiveness of the advertising displays in modifying purchasing behavior of the customer. Systems for measuring such in-store media exposure are also provided and comprise a plurality of carts having emitting devices, a plurality of advertising displays positioned around a store with each advertising display including a reading device configured to record cart and time data, and a central computer configured to receive the data and measure the effectiveness of the advertising displays.