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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>RT Table Generator</title>
    <link rel="stylesheet" href="./styles.css">
</head>

<body>
    <header>
        <h1>RT Table Generator</h1>
        <ul class="nav-tabs">
            <li><a href="./RT_Table_NTC.html">NTC</a></li>
            <li><a href="./RT_Table_PT100.html">PT100</a></li>
            <li><a href="./RT_Table_PT1000.html">PT1000</a></li>
            <li><a href="./VT_Table_TJ.html" class="active">Thermocouple</a></li>
            <li><a href="./RT_Table_Import.html">Import Data</a></li>
        </ul>
    </header>

    <div class="container">
        <section>
            <h2 class="section-title">Thermocouple VT Table Generator</h2>
            <!-- 计算公式展示 -->
            <div class="formula">
                <p>Thermocouple Voltage Calculation Formula:</p>
                <div class="highlight">
                    <div class="math-formula" id="formulaDisplay">
                        V =
                        <span class="math-sum">
                            <span class="math-limits">
                                <span class="math-to">n</span>
                                <span class="math-from">i=0</span>
                            </span>
                        </span>
                        C<sub>i</sub> · T<sup>i</sup>
                    </div>
                </div>
                <p>Coefficients: <span id="coefficientsDisplay"></span></p>
                <p>Where:</p>
                <ul>
                    <li>V is the voltage in microvolts (μV)</li>
                    <li>T is the temperature in degrees Celsius (°C)</li>
                    <li>C<sub>i</sub> are the polynomial coefficients specific to each thermocouple type</li>
                </ul>
            </div>
        </section>

        <section>
            <h2 class="section-title">Parameters</h2>
            <!-- 参数设置 -->
            <div>
                 <table class="params-table">
                     <tr>
                         <td>
                             <label for="param_T_min">Temperature Min (°C):</label>
                         </td>
                         <td>
                             <input type="number" id="param_T_min" name="param_T_min" value="0" class="tableInput">
                         </td>
                     </tr>
                     <tr>
                         <td>
                             <label for="param_T_max">Temperature Max (°C):</label>
                         </td>
                         <td>
                             <input type="number" id="param_T_max" name="param_T_max" value="1000" class="tableInput">
                         </td>
                     </tr>
                     <tr>
                         <td>
                             <label for="param_step">Temperature Step (°C):</label>
                         </td>
                         <td>
                             <input type="number" id="param_step" name="param_step" value="10" class="tableInput">
                         </td>
                     </tr>
                     <tr>
                         <td>
                             <label for="thermocouple-type">Thermocouple Type:</label>
                         </td>
                         <td>
                             <select id="thermocouple-type" class="tableInput">
                                 <option value="K">Type K</option>
                                 <option value="J">Type J</option>
                                 <option value="T">Type T</option>
                                 <option value="S">Type S</option>
                             </select>
                         </td>
                     </tr>
                     <tr>
                         <td colspan="2">
                             <button onclick="generateData()">Generate Table</button>
                         </td>
                     </tr>
                 </table>
             </div>
         </section>

        <section>
            <h2 class="section-title">Results</h2>

            <!-- 动态生成的表格 -->
            <div style="max-height: 400px; overflow-y: auto; margin-bottom: 20px;">
                <table id="vtTable">
                    <thead>
                        <tr>
                            <th>Temperature (°C)</th>
                            <th>Voltage (mV)</th>
                        </tr>
                    </thead>
                    <tbody>
                        <!-- 数据将通过JavaScript动态插入 -->
                    </tbody>
                </table>
            </div>

            <!-- JSON 数据文本框 -->
            <h3>JSON Data</h3>
            <textarea id="jsonData" readonly></textarea>

            <!-- C语言数组文本框 -->
            <h3>C Language Arrays</h3>
            <textarea id="cArrayData" readonly></textarea>
        </section>
    </div>

    <script>
        // 热电偶系数定义
        const thermocoupleCoefficients = {
            K: [
                -0.176004136860e-1, 0.389212049750e-1, 0.185587700320e-4,
                -0.994575928740e-7, 0.318409457190e-9, -0.560728448890e-12,
                0.560750590590e-15, -0.320207200030e-18, 0.971511471520e-22,
                -0.121047212750e-25
            ],
            J: [
                -0.100000000000e+1, 0.350000000000e+0, 0.105000000000e-2,
                -0.695000000000e-5, 0.225000000000e-7, -0.285000000000e-10
            ],
            T: [
                -0.290706506850e-1, 0.232206022080e-1, -0.104960120220e-4,
                -0.338410059680e-8, 0.234047497380e-11
            ],
            S: [
                0.000000000000e+0, 0.018287550000e+0, -0.000055010000e-4,
                0.000000000000e+0, -0.000000000000e+0
            ]
        };

        // 计算热电偶电压 (基于分度表公式)
        function calculateVoltage(T, coefficients) {
            let voltage = 0;
            for (let i = 0; i < coefficients.length; i++) {
                voltage += coefficients[i] * Math.pow(T, i);
            }
            return voltage;
        }

        // 生成热电偶温度-电压表
        function generateThermocoupleTable(Tmin, Tmax, step, coefficients) {
            const table = [];
            for (let T = Tmin; T <= Tmax; T += step) {
                const voltage = calculateVoltage(T, coefficients);
                table.push({ temperature: T, voltage: voltage });
            }
            return table;
        }

        // 显示表格数据
        function displayTable(data) {
            const tbody = document.getElementById("vtTable").querySelector("tbody");
            tbody.innerHTML = "";  // 清空表格内容
            data.forEach(row => {
                const tr = document.createElement("tr");
                tr.innerHTML = `<td>${row.temperature}</td><td>${row.voltage}</td>`;
                tbody.appendChild(tr);
            });
        }

        // 显示 JSON 数据到文本框
        function displayJsonData(data) {
            const jsonData = JSON.stringify(data, null, 4); // 格式化JSON
            const textarea = document.getElementById("jsonData");
            textarea.value = jsonData;
        }

        // 显示 C 语言数组到文本框
        function displayCArrayData(data) {
            const temperatures = data.map(row => row.temperature); // 提取温度值
            const voltages = data.map(row => row.voltage);         // 提取电压值

            const param_T_min = parseInt(document.getElementById("param_T_min").value);
            const param_T_max = parseInt(document.getElementById("param_T_max").value);
            const param_step = parseInt(document.getElementById("param_step").value);
            const thermocoupleType = document.getElementById("thermocouple-type").value;

            var prefix = (param_T_min < 0 ? 'N' : 'P') + Math.abs(param_T_min).toString() + 'to' + (param_T_max < 0 ? 'N' : 'P') + Math.abs(param_T_max).toString() + '_' + param_step.toString();
            const cArrayTempSize = `const uint16_t VT_table_TJ${thermocoupleType}_${prefix}_size = ${temperatures.length};`;
            const cArrayTemp = `const double VT_table_TJ${thermocoupleType}_${prefix}_T[${temperatures.length}] = { ${temperatures.join(", ")} };`;
            const cArrayVolt = `const double VT_table_TJ${thermocoupleType}_${prefix}_V[${voltages.length}] = { ${voltages.join(", ")} };`;

            const textarea = document.getElementById("cArrayData");
            textarea.value = `${cArrayTempSize}\n\n${cArrayTemp}\n\n${cArrayVolt}`;
        }

        // 生成数据函数
        function generateData() {
            const thermocoupleType = document.getElementById("thermocouple-type").value;

            // 根据选择的热电偶类型获取系数
            const coefficients = thermocoupleCoefficients[thermocoupleType];

            // 获取用户输入的温度范围和步长
            const Tmin = parseInt(document.getElementById("param_T_min").value);
            const Tmax = parseInt(document.getElementById("param_T_max").value);
            const step = parseInt(document.getElementById("param_step").value);

            // 生成数据表
            const vtData = generateThermocoupleTable(Tmin, Tmax, step, coefficients);

            // 显示数据
            displayTable(vtData);       // 显示表格
            displayJsonData(vtData);    // 显示JSON数据
            displayCArrayData(vtData);  // 显示C语言数组数据

            // 显示热电偶系数
            displayCoefficients(coefficients);

            // 更新公式显示
            document.getElementById("formulaDisplay").innerHTML = `V = <span class="math-sum"><span class="math-limits"><span class="math-to">n</span><span class="math-from">i=0</span></span></span> C<sub>i</sub> · T<sup>i</sup>`;
        }

        // 显示热电偶系数
        function displayCoefficients(coefficients) {
            const coeffDisplay = document.getElementById("coefficientsDisplay");
            // 格式化系数显示，保留小数点后12位，使显示更美观
            const formattedCoeffs = coefficients.map(coeff => {
                // 使用科学计数法格式化系数
                return Number(coeff).toExponential(12);
            });
            coeffDisplay.textContent = formattedCoeffs.join(", ");
        }

        // 默认生成K型热电偶的数据
        generateData();
    </script>
</body>

</html>