A method of magnetocardiography (MCG) measurement using an overdamped bistable model based stochastic resonance (SR) technique for advancing biomagnetic sensors is proposed. To determine the system parameters for SR, an evolutionary algorithm combined with the coherent detection (CD) method is applied. We acquire and process an animal MCG at room temperature, detected by a commercially available optically pumped magnetometer. A comparison with a lowpass filter and the traditional CD method verified the ability of the proposed method to obtain a higher signal-to-noise ratio and peak value of the MCG, whilst retaining sufficient dynamic information.

中文翻译：

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用于测量室温心磁图的相干检测随机共振辅助生物磁强计

提出了一种使用基于过阻尼双稳态模型的随机共振 (SR) 技术来推进生物磁传感器的心磁图 (MCG) 测量方法。为了确定 SR 的系统参数，应用了与相干检测 (CD) 方法相结合的进化算法。我们在室温下获取和处理动物 MCG，由市售的光泵磁力计检测。与低通滤波器和传统 CD 方法的比较验证了所提出的方法能够获得更高的 MCG 信噪比和峰值，同时保留足够的动态信息。