A Preliminary Study on a Voided Volume Measuring Method Using Noncontact Temperature Sensors under the Toilet Seat
A Preliminary Study on a Voided Volume Measuring Method Using Noncontact Temperature Sensors under the Toilet Seat
复制标题
马桶座圈下非接触式温度传感器空隙体积测量方法的初步研究
DOI：
10.14326/abe.8.1
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发表时间：
2019
影响因子：
1
通讯作者：
K. Nakajima
中科院分区：
文献类型：
--
作者：
K. Fujita;Y. Kanayama;Juhyon Kim;K. Nakajima
一些测量排泄量和流量的系统已经被开发出来。临床上，排尿参数是使用具有特殊接收器（例如杯子或碗）的尿流量计来测量的。由于这些尿流量计是为临床使用而开发的，因此家庭使用既困难又不方便。其中许多设备需要设备清洁；此外，大多数对于家庭使用来说都太贵了。为了解决这些问题，我们开发了一种通过安装在马桶座圈下方的非接触式矩阵温度传感器来测量排泄量的方法。基本概念如下。尿液在核心温度37°C时排出。通过非接触式矩阵温度传感器测量尿液在排泄过程中辐射的热量，并将测得的辐射热量转换为排尿量。进行了一项初步研究，以使用实际马桶估算排泄量。非接触式矩阵温度传感器采用四行四列矩阵，同时测量 16 个区域 37°C 的落水温度。马桶座圈下侧的前、后、左、右安装了四个非接触式矩阵温度传感器。配备四个传感器的马桶座圈安装在马桶上。落水位置固定在距前传感器120mm处。 100、200和300ml的水体积以10、20、30和40ml/s的流速垂直通过。结果，马桶表面因落下的水的热量而被稍微加热，并且马桶在水落下后保留了热量。为了消除对马桶热量的高估，我们提出了两种分析方法：偏差温度消除法和时间限制法。对于所有四种流量，通过时间限制法获得的U随比例体积的变化小于通过偏置温度消除法获得的U随比例体积的变化。
Some systems to measure voided volume and ow rate have been developed. Clinically, urination parameters are measured using uro owmeters that have special receivers such as cups or bowls. Since these uro owmeters were developed for clinical use, home use is dif cult and inconvenient. Many of these devices require equipment cleaning; additionally, most are too expensive for home use. To address these problems, we developed a method to measure voided volume by noncontact matrix temperature sensors that are installed under a toilet seat. The basic concept is as follows. Urine is excreted at core temperature of 37°C. The heat radiated from urine during excretion is measured by noncontact matrix temperature sensors, and the measured radiated heat is converted to urination volume. A preliminary study was conducted to estimate the voided volume using an actual toilet bowl. The noncontact matrix temperature sensors simultaneously measure the temperature of falling water at 37°C in 16 areas using a matrix of four lines and four rows. Four noncontact matrix temperature sensors were installed at the front, rear, left and right of the underside of a toilet seat. The toilet seat equipped with the four sensors was installed on a toilet bowl. The position of the falling water was xed at 120 mm from the front sensor. Water volumes of 100, 200 and 300 ml were passed vertically at ow rates of 10, 20, 30 and 40 ml/s. As a result, the surface of the toilet bowl was slightly heated from the heat of the falling water, and the toilet bowl retained the heat after the water had fallen. To eliminate overestimation of heat from the toilet bowl, we proposed two analytical methods: a bias temperature elimination method and a time limitation method. For all four ow rates, the variation of U with a proportional volume obtained by the time limitation method was smaller than that by the bias temperature elimination method.