Adding Proximity Sensing Capability to Tactile Array Based on Off-the-Shelf FSR and PSoC. - Julián Castellanos-Ramos; Andrés Trujillo-León; Rafael Navas-González; Francisco Barbero-Recio; José A. Sánchez-Durán; Óscar Oballe-Peinado; Fernando Vidal-Verdú (IEEE Trans. Instrum. Meas., 2020)