目的 研究生物供电时间温度指示器(Time-temperature integrator，TTI)放电参数与酸奶品质参数之间是否存在相关性。方法 实验以马铃薯为生物电池的底物，铜片和锌片为电极制作生物供电TTI，将生物供电TTI和酸奶同时置于温度37 ℃下存放30 min，其余时间置于2～6 ℃下恒温贮存，模拟酸奶从产地到消费者住所经历的多次温度变化，通过自制平台实时获取时间、温度和生物供电TTI的放电参数，以2～6 ℃恒温贮存的酸奶和生物供电TTI为对照，检测实验过程中酸奶的乳酸菌数和霉菌数的变化情况。结果 通过实验发现生物供电TTI的输出电压幅值和放电累积量均会随环境温度变化发生相匹配的变化，同时与乳酸菌数的变化也满足一定的线性关系。结论 生物供电TTI具有检测酸奶变质的潜能，通过改变TTI的电导池常数、底物种类、预处理温度和时间都可以改变其放电总量，以匹配更多的食品。

The work aims to study the correlation between the discharge parameters of bio-powered TTI and the quality parameters of yogurt. Potato was used as the substrate of biological battery, copper and zinc were used as electrodes to make bio-powered TTI in the experiment, the bio-powered TTI and yogurt were stored at 37 ℃ for 30 minutes and stored at 2-6 ℃ for the rest of the time to simulate the multiple temperature changes experienced by the yogurt from the place of production to the consumer's residence. Time, temperature and discharge parameters of bio-powered TTI were obtained in real time by self-made platform. Taking yogurt and bio-powered TTI stored at 2-6 ℃ as control, the changes of the number of lactic acid bacteria and mold in yogurt were detected during the experiment. It was found that the output voltage amplitude and discharge integral of bio-powered TTI will match with the change of ambient temperature, and also have a certain linear relationship with the change of the number of lactic acid bacteria through the experiments. Bio-powered TTI has the potential to detect the deterioration of yogurt. The total amount of discharge can be changed to match more food by changing the conductance cell constant, substrate species, pretreatment temperature and time of TTI.