ROHM has developed a gas concentration measurement system using a limiting current-type gas sensor, voltage source, current detector, and gas concentration arithmetic unit. The system accurately calculates gas concentration by analyzing differences in limiting currents generated by different voltages applied to the sensor. GlobalData’s report on ROHM gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on ROHM, Under-screen biometric identification was a key innovation area identified from patents. ROHM's grant share as of January 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
Gas concentration measurement system with limiting current-type gas sensor
A gas concentration measurement system has been granted a patent (Publication Number: US11885763B2) that includes a limiting current-type gas sensor connected to a voltage source and a current detector. The system also features a gas concentration arithmetic unit that calculates the concentration of a second gas based on the difference between the limiting currents generated by applying different voltages to the sensor. The sensor element comprises a solid electrolyte, electrodes, and an insulating layer, with the insulating layer having specific configurations to facilitate accurate gas concentration measurements.
Furthermore, the patented system can include multiple sensor elements and corresponding current detecting elements to enhance the accuracy of gas concentration calculations. By applying different voltages to these elements and analyzing the resulting limiting currents, the system can determine the concentration of gases such as oxygen and nitrogen oxides. The circuitry within the system is designed to amplify and process the signals from the sensor elements to calculate the gas concentrations effectively. Additionally, the system utilizes specific materials for the electrodes and gas introduction path to ensure reliable and precise measurements, with the insulating layer playing a crucial role in maintaining the integrity of the sensor elements.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
