CN106643979A - Automatic compensation method and device for guided wave radar level meter measured value - Google Patents
Automatic compensation method and device for guided wave radar level meter measured value Download PDFInfo
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Abstract
本发明涉及一种导波雷达物位计测量值的自动补偿方法及装置，该方法包括以下步骤：确定圆筒与表头法兰的实际距离，朝向圆筒方向发射电磁波；电磁波接触圆筒和物位后反射，形成原始回波信号；通过采集原始回波信号计算圆筒与表头法兰的测量距离以及计算物位与导波雷达物位计表头法兰的测量距离；计算经过补偿之后物位与导波雷达物位计表头法兰的实际距离；该装置包括：信号发射模块发射电磁波，反射模块，采集模块采集原始回波信号，计算模块计算物位与表头法兰的实际距离。本发明提出测量值的自动补偿方法及装置，在高压高温环境中能准确测量物位。
The invention relates to an automatic compensation method and device for the measured value of a guided wave radar level gauge. The method comprises the following steps: determining the actual distance between the cylinder and the flange of the gauge head, and emitting electromagnetic waves toward the cylinder; the electromagnetic waves contact the cylinder and The material level is reflected back to form the original echo signal; the measurement distance between the cylinder and the gauge head flange is calculated by collecting the original echo signal, and the measurement distance between the material level and the gauge head flange of the guided wave radar level meter is calculated; the calculation is compensated After that, the actual distance between the material level and the flange of the head of the guided wave radar level meter; the device includes: the signal transmitting module emits electromagnetic waves, the reflection module, the acquisition module collects the original echo signal, and the calculation module calculates the distance between the material level and the flange of the meter head actual distance. The invention proposes an automatic compensation method and device for measured values, which can accurately measure the material level in a high-pressure and high-temperature environment.
Description
技术领域technical field
本发明涉及导波雷达物位计领域，尤其涉及一种导波雷达物位计测量值的自动补偿方法及装置。The invention relates to the field of guided wave radar level gauges, in particular to an automatic compensation method and device for measured values of guided wave radar level gauges.
背景技术Background technique
工业自动化领域用于连续物位测量的导波雷达物位计是现代工业现场一种常见的仪表，测量原理是电磁波通过导波杆发射出去，遇到被测物质后部分能量被反射回来，经过电路处理，送由处理器采集，最后通过智能软件识别出有效回波，从而计算出仪表距离物位的距离，再依据安装罐体的高度，计算出实际的料高。The guided wave radar level gauge used for continuous level measurement in the field of industrial automation is a common instrument in modern industrial sites. The measurement principle is that electromagnetic waves are emitted through the probe. Circuit processing, sent to the processor for collection, and finally through the intelligent software to identify the effective echo, so as to calculate the distance between the instrument and the material level, and then calculate the actual material height according to the height of the installed tank.
导波雷达的测量原理就是电磁波的反射原理，由于电磁波在不同介质、不同温度、不同压力情况下的传播速度不同，例如电磁波在常温常压空气中的传播速度是30万公里每秒，但是在高温高压的蒸汽中的传播速度会明显降低，或者在CO、HCI、N2等非空气介质中的传播速度也会明显降低。The measurement principle of guided wave radar is the reflection principle of electromagnetic waves. Since the propagation speed of electromagnetic waves is different in different media, different temperatures, and different pressures, for example, the propagation speed of electromagnetic waves in air at normal temperature and pressure is 300,000 kilometers per second, but in The propagation velocity in high-temperature and high-pressure steam will be significantly reduced, or the propagation velocity in non-air media such as CO, HCI, and N2 will also be significantly reduced.
一般情况下，导波雷达物位计内部都是按电磁波的速度是30万公里每秒计算距离的，这种情况下，如果现场是高温、高压或者传播介质不是空气，仪表的测量输出就会不准确，造成测量误差。经过分析，如果不进行补偿，仪表测量出来的物位就会比实际物位低，而且随着温度的升高、压力的增加，这种误差会越来越大。Under normal circumstances, the guided wave radar level gauge internally calculates the distance according to the electromagnetic wave speed of 300,000 kilometers per second. In this case, if the scene is high temperature, high pressure or the propagation medium is not air, the measurement output of the instrument will be Inaccurate, resulting in measurement error. After analysis, if there is no compensation, the level measured by the instrument will be lower than the actual level, and with the increase of temperature and pressure, this error will become larger and larger.
发明内容Contents of the invention
本发明所要解决的技术问题是导波雷达物位计容易受温度、压强以及传播介质的影响而导致测量结果不准确，因此提供了一种导波雷达物位计测量值的自动补偿方法及装置。The technical problem to be solved by the present invention is that the guided wave radar level gauge is easily affected by temperature, pressure and propagation medium, resulting in inaccurate measurement results. Therefore, an automatic compensation method and device for the measured value of the guided wave radar level gauge are provided. .
本发明解决上述技术问题的技术方案如下：一种导波雷达物位计测量值的自动补偿方法，包括以下步骤：The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an automatic compensation method for the measured value of a guided wave radar level gauge, comprising the following steps:
步骤1：在导波雷达物位计的导波杆上设置一个圆筒；Step 1: Set a cylinder on the probe of the guided wave radar level gauge;
步骤2：确定圆筒与导波雷达物位计表头法兰的实际距离；Step 2: Determine the actual distance between the cylinder and the flange of the head of the guided wave radar level gauge;
步骤3：朝向圆筒方向发射电磁波；Step 3: Launch electromagnetic waves towards the cylinder;
步骤4：电磁波接触圆筒和物位后反射，形成原始回波信号；Step 4: The electromagnetic wave is reflected after touching the cylinder and the material level to form the original echo signal;
步骤5：通过采集原始回波信号计算圆筒与导波雷达物位计表头法兰的测量距离以及计算物位与导波雷达物位计表头法兰的测量距离；Step 5: Calculate the measurement distance between the cylinder and the head flange of the guided wave radar level meter by collecting the original echo signal, and calculate the measurement distance between the material level and the head flange of the guided wave radar level meter;
步骤6：根据所述实际距离、圆筒与导波雷达物位计表头法兰的测量距离、物位与导波雷达物位计表头法兰的测量距离，计算经过补偿之后物位与导波雷达物位计表头法兰的实际距离。Step 6: According to the actual distance, the measuring distance between the cylinder and the flange of the head of the guided wave radar level meter, and the measuring distance between the material level and the flange of the head of the guided wave radar level meter, calculate the difference between the level and the level after compensation. The actual distance from the flange of the head of the guided wave radar level gauge.
本发明的有益效果是：通过导波雷达物位计测量值的自动补偿算法，在高压高温环境中也能准确测量物位，与现有技术相比，其测量物位结果具有更高的准确度。The beneficial effect of the present invention is: through the automatic compensation algorithm of the measured value of the guided wave radar level meter, the level can be accurately measured in the high-pressure and high-temperature environment. Compared with the prior art, the result of the level measurement has higher accuracy. Spend.
在上述技术方案的基础上，本发明还可以做如下改进。On the basis of the above technical solutions, the present invention can also be improved as follows.
进一步地，所述导波杆穿过圆筒，所述圆筒距离导波雷达物位计表头法兰的实际距离为400mm或500mm，所述圆筒直径为11mm，长度为200mm，所述导波杆直径为8mm。Further, the probe passes through the cylinder, and the actual distance between the cylinder and the flange of the guided wave radar level gauge head is 400mm or 500mm, the diameter of the cylinder is 11mm, and the length is 200mm. The diameter of the probe is 8mm.
进一步地，所述步骤5包括：初始化定时器模块、模数转换模块及直接内存存取模块，定时器模块触发模数转换模块进行模数转换，模数转换模块转换完成后，直接内存存取模块将模数转换模块转换结果传输到处理器内部随机存取存储器区的数组中。Further, the step 5 includes: initializing the timer module, the analog-to-digital conversion module and the direct memory access module, the timer module triggers the analog-to-digital conversion module to perform analog-to-digital conversion, and after the conversion of the analog-to-digital conversion module is completed, the direct memory access The module transfers the conversion result of the analog-to-digital conversion module to the array in the internal random access memory area of the processor.
进一步地，所述步骤5包括：第一次采集原始回波信号，构建虚假回波，识别量程范围内的第一个波形，得到圆筒反射电磁波形成的固定反射信号，计算出圆筒与导波雷达物位计表头法兰的测量距离；第二次采集原始回波信号，构建虚假回波，识别量程范围内的幅值最大的波形，得到物位反射电磁波形成的物位反射信号，计算出物位与导波雷达物位计表头法兰的测量距离。Further, the step 5 includes: collecting the original echo signal for the first time, constructing a false echo, identifying the first waveform within the range, obtaining the fixed reflection signal formed by the reflected electromagnetic wave of the cylinder, and calculating the distance between the cylinder and the guide. The measurement distance of the wave radar level meter head flange; the second time to collect the original echo signal, construct a false echo, identify the waveform with the largest amplitude within the range, and obtain the level reflection signal formed by the electromagnetic wave reflected by the level. Calculate the measurement distance between the material level and the flange of the guided wave radar level meter.
进一步地，所述步骤6包括：根据比例关系即来进行经过补偿之后物位与导波雷达物位计表头法兰的实际距离的计算，式中S1为圆筒与导波雷达物位计表头法兰的实际距离，S2为圆筒与导波雷达物位计表头法兰的测量距离，L1为经过补偿之后物位与导波雷达物位计表头法兰的实际距离，L2为物位与导波雷达物位计表头法兰的测量距离。Further, the step 6 includes: according to the proportional relationship which is To calculate the actual distance between the material level and the flange of the guided wave radar level meter after compensation, where S1 is the actual distance between the cylinder and the flange of the guided wave radar level meter, and S2 is the distance between the cylinder and the flange of the guided wave radar level meter. The measurement distance of the head flange of the guided wave radar level meter, L1 is the actual distance between the material level and the head flange of the guided wave radar level meter after compensation, and L2 is the method between the material level and the head of the guided wave radar level meter Lan's measurement distance.
进一步地，所述补偿方法还包括步骤7：重复步骤2-6，对物位高度进行连续测量。Further, the compensation method further includes step 7: repeating steps 2-6 to continuously measure the height of the material level.
本发明提供的另一种技术方案如下：一种导波雷达物位计测量值的自动补偿装置，包括：信号发射模块、反射模块、采集模块及计算模块；Another technical solution provided by the present invention is as follows: an automatic compensation device for the measured value of a guided wave radar level meter, comprising: a signal transmitting module, a reflection module, an acquisition module and a calculation module;
所述信号发射模块用于朝向物位方向发射电磁波，电磁波经过反射模块和物位时进行反射，生成原始回波信号；The signal transmitting module is used for transmitting electromagnetic waves toward the material level, and the electromagnetic waves are reflected when passing through the reflection module and the material level to generate original echo signals;
所述反射模块位于导波雷达物位计的导波杆上；The reflection module is located on the probe of the guided wave radar level gauge;
所述采集模块用于采集原始回波信号，第一次采集原始回波信号，构建虚假回波，识别量程范围内的第一个波形，得到反射模块反射电磁波形成的固定反射信号；第二次采集原始回波信号，构建虚假回波，识别量程范围内的幅值最大的波形，得到物位反射电磁波形成的物位反射信号；The collection module is used to collect the original echo signal, collect the original echo signal for the first time, construct the false echo, identify the first waveform within the range, and obtain the fixed reflection signal formed by the reflection module reflecting the electromagnetic wave; the second time Collect the original echo signal, build a false echo, identify the waveform with the largest amplitude within the range, and obtain the level reflection signal formed by the electromagnetic wave reflected by the level;
所述计算模块用于根据固定反射信号计算反射模块与导波雷达物位计表头法兰的测量距离和根据物位反射信号计算物位与导波雷达物位计表头法兰的测量距离，结合反射模块与导波雷达物位计表头法兰的实际距离进行计算经过补偿之后物位与导波雷达物位计表头法兰的实际距离。The calculation module is used to calculate the measurement distance between the reflection module and the head flange of the guided wave radar level gauge according to the fixed reflection signal, and calculate the measurement distance between the material level and the head flange of the guided wave radar level gauge according to the level reflection signal , combined with the actual distance between the reflection module and the flange of the head of the guided wave radar level meter to calculate the actual distance between the material level and the flange of the head of the guided wave radar level meter after compensation.
进一步地，所述反射模块包括圆筒，导波杆穿过圆筒，所述反射模块与导波雷达物位计表头法兰的实际距离为400mm或500mm，所述圆筒直径为11mm，长度为200mm，所述导波杆直径为8mm。Further, the reflection module includes a cylinder, the probe passes through the cylinder, the actual distance between the reflection module and the flange of the guided wave radar level gauge head is 400mm or 500mm, and the diameter of the cylinder is 11mm, The length is 200mm, and the diameter of the probe is 8mm.
进一步地，所述采集模块包括：初始化定时器模块、模数转换模块和直接内存存取模块，定时器模块触发模数转换模块进行模数转换，模数转换模块转换完成后，直接内存存取模块将模数转换模块转换结果传输到处理器内部随机存取存储器区的数组中。Further, the acquisition module includes: an initialization timer module, an analog-to-digital conversion module and a direct memory access module, the timer module triggers the analog-to-digital conversion module to perform analog-to-digital conversion, and after the conversion of the analog-to-digital conversion module is completed, the direct memory access The module transfers the conversion result of the analog-to-digital conversion module to the array in the internal random access memory area of the processor.
进一步地，所述计算模块包括：根据比例关系即来进行经过补偿之后物位与导波雷达物位计表头法兰的实际距离的计算，式中S1为圆筒与导波雷达物位计表头法兰的实际距离，S2为圆筒与导波雷达物位计表头法兰的测量距离，L1为经过补偿之后物位与导波雷达物位计表头法兰的实际距离，L2为物位与导波雷达物位计表头法兰的测量距离。Further, the calculation module includes: according to the proportional relationship which is To calculate the actual distance between the material level and the flange of the guided wave radar level meter after compensation, where S1 is the actual distance between the cylinder and the flange of the guided wave radar level meter, and S2 is the distance between the cylinder and the flange of the guided wave radar level meter. The measurement distance of the head flange of the guided wave radar level meter, L1 is the actual distance between the material level and the head flange of the guided wave radar level meter after compensation, and L2 is the method between the material level and the head of the guided wave radar level meter Lan's measurement distance.
附图说明Description of drawings
图1为本发明一种导波雷达物位计测量值的自动补偿方法及装置的流程示意图；Fig. 1 is a schematic flow chart of an automatic compensation method and device for a measured value of a guided wave radar level gauge according to the present invention;
图2为本发明一种导波雷达物位计测量值的自动补偿方法及装置的波形图；Fig. 2 is a waveform diagram of an automatic compensation method and device for a measured value of a guided wave radar level gauge according to the present invention;
图3为本发明一种导波雷达物位计测量值的自动补偿方法及装置的结构示意图；Fig. 3 is a structural schematic diagram of an automatic compensation method and device for a measured value of a guided wave radar level gauge according to the present invention;
附图中，各标号所代表的部件列表如下：In the accompanying drawings, the list of parts represented by each label is as follows:
1、表头，2、表头法兰，3、圆筒，4、导波杆，5、物位，S1、圆筒距离导波雷达法兰盘的实际距离，S2、根据固定反射信号计算出的圆筒与导波雷达物位计表头法兰的距离，L1、经过补偿之后物位与导波雷达物位计表头法兰的实际距离，L2、根据物位反射信号计算出的物位与导波雷达物位计表头法兰的距离。1. Meter head, 2. Meter head flange, 3. Cylinder, 4. Probe, 5. Material level, S1, the actual distance between the cylinder and the guided wave radar flange, S2, calculated according to the fixed reflection signal The distance between the cylinder and the flange of the guided wave radar level meter, L1, the actual distance between the level after compensation and the flange of the guided wave radar level meter, L2, calculated according to the level reflection signal The distance between the material level and the flange of the guided wave radar level meter.
具体实施方式detailed description
以下结合附图对本发明的原理和特征进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
如图1所示，为本发明实施例给出的一种导波雷达物位计测量值的自动补偿方法，包括以下步骤：As shown in Fig. 1, a kind of automatic compensation method of the measured value of guided wave radar level gauge that provides for the embodiment of the present invention, comprises the following steps:
步骤1：在导波雷达物位计的导波杆4上设置一个圆筒；Step 1: Set a cylinder on the probe 4 of the guided wave radar level gauge;
步骤2：确定圆筒3与导波雷达物位计表头法兰2的实际距离；Step 2: Determine the actual distance between the cylinder 3 and the flange 2 of the head of the guided wave radar level gauge;
步骤3：朝向圆筒3方向发射电磁波；Step 3: Emit electromagnetic waves toward cylinder 3;
步骤4：电磁波接触圆筒3和物位5后反射，形成原始回波信号；Step 4: The electromagnetic wave is reflected after contacting the cylinder 3 and the material level 5 to form an original echo signal;
步骤5：通过采集原始回波信号计算圆筒3与导波雷达物位计表头法兰2的测量距离以及计算物位5与导波雷达物位计表头法兰2的测量距离；Step 5: Calculate the measurement distance between the cylinder 3 and the flange 2 of the head of the guided wave radar level gauge by collecting the original echo signal, and calculate the measurement distance between the material level 5 and the flange 2 of the head of the guided wave radar level gauge;
步骤6：根据所述实际距离、圆筒3与导波雷达物位计表头法兰2的测量距离、物位5与导波雷达物位计表头法兰2的测量距离，计算经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离。Step 6: According to the actual distance, the measurement distance between the cylinder 3 and the head flange 2 of the guided wave radar level meter, and the measurement distance between the material level 5 and the head flange 2 of the guided wave radar level meter, calculate the compensated Afterwards, the actual distance between the material level 5 and the flange 2 of the guided wave radar level gauge.
其中，所述导波杆4穿过圆筒3，所述圆筒3距离导波雷达物位计表头法兰2的实际距离为400mm或500mm，所述圆筒3直径为11mm，长度为200mm，所述导波杆4直径为8mm。Wherein, the probe 4 passes through the cylinder 3, and the actual distance between the cylinder 3 and the flange 2 of the guided wave radar level gauge head is 400 mm or 500 mm, and the diameter of the cylinder 3 is 11 mm, and the length is 200mm, and the diameter of the probe 4 is 8mm.
其中，所述步骤5包括：初始化定时器模块、模数转换模块和直接内存存取模块，定时器模块触发模数转换模块进行模数转换，模数转换模块转换完成后，直接内存存取模块将模数转换模块转换结果传输到处理器内部随机存取存储器区的数组中。Wherein, the step 5 includes: initializing the timer module, the analog-to-digital conversion module and the direct memory access module, the timer module triggers the analog-to-digital conversion module to perform analog-to-digital conversion, and after the conversion of the analog-to-digital conversion module is completed, the direct memory access module The conversion result of the analog-to-digital conversion module is transferred to the array in the internal random access memory area of the processor.
其中，所述步骤5包括：第一次采集原始回波信号，构建虚假回波，识别量程范围内的第一个波形，得到圆筒3反射电磁波形成的固定反射信号，计算出圆筒3与导波雷达物位计表头法兰2的测量距离；第二次采集原始回波信号，构建虚假回波，识别量程范围内的幅值最大的波形，得到物位5反射电磁波形成的物位反射信号，计算出物位5与导波雷达物位计表头法兰2的测量距离。Wherein, the step 5 includes: collecting the original echo signal for the first time, constructing a false echo, identifying the first waveform within the range, obtaining the fixed reflection signal formed by the reflected electromagnetic wave of the cylinder 3, and calculating the relationship between the cylinder 3 and The measurement distance of the flange 2 of the head of the guided wave radar level meter; the second time to collect the original echo signal, construct a false echo, identify the waveform with the largest amplitude within the range, and obtain the material level formed by the electromagnetic wave reflected by the material level 5 Reflect the signal to calculate the measurement distance between the material level 5 and the flange 2 of the guided wave radar level gauge head.
其中，所述步骤6包括：根据比例关系即来进行经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离的计算，式中S1为圆筒3与导波雷达物位计表头法兰2的实际距离，S2为圆筒3与导波雷达物位计表头法兰2的测量距离，L1为经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离，L2为物位5与导波雷达物位计表头法兰2的测量距离。Wherein, the step 6 includes: according to the proportional relationship which is To calculate the actual distance between the material level 5 and the flange 2 of the guided wave radar level gauge after compensation, where S1 is the actual distance between the cylinder 3 and the flange 2 of the guided wave radar level gauge, and S2 is the measurement distance between the cylinder 3 and the flange 2 of the guided wave radar level gauge head, L1 is the actual distance between the material level 5 and the guided wave radar level gauge flange 2 after compensation, and L2 is the distance between the material level 5 and the flange 2 of the guided wave radar level gauge The measurement distance of the flange 2 of the head of the guided wave radar level gauge.
其中，所述补偿方法还包括步骤7：重复步骤2-6，对物位高度进行连续测量。Wherein, the compensation method further includes step 7: repeating steps 2-6 to continuously measure the height of the material level.
本发明实施例还给出一种导波雷达物位计测量值的自动补偿装置,包括：信号发射模块、反射模块、采集模块及计算模块；The embodiment of the present invention also provides an automatic compensation device for the measured value of the guided wave radar level meter, including: a signal transmitting module, a reflecting module, an collecting module and a calculating module;
所述信号发射模块用于朝向物位5方向发射电磁波，电磁波经过反射模块和物位5时进行反射，生成原始回波信号；The signal transmitting module is used to transmit electromagnetic waves towards the direction of the material level 5, and the electromagnetic waves are reflected when passing through the reflection module and the material level 5 to generate an original echo signal;
所述反射模块位于导波雷达物位计的导波杆4上；The reflection module is located on the probe 4 of the guided wave radar level gauge;
所述采集模块用于采集原始回波信号，第一次采集原始回波信号，进行构建虚假回波，识别量程范围内的第一个波形，得到反射模块反射电磁波形成的固定反射信号；第二次采集原始回波信号，构建虚假回波，识别量程范围内的幅值最大的波形，得到物位5反射电磁波形成的物位反射信号；The collection module is used to collect the original echo signal, collect the original echo signal for the first time, construct the false echo, identify the first waveform within the range, and obtain the fixed reflection signal formed by the reflection module reflecting the electromagnetic wave; the second Collect the original echo signal once, build a false echo, identify the waveform with the largest amplitude within the range, and obtain the material level reflection signal formed by the electromagnetic wave reflected by the material level 5;
所述计算模块用于根据固定反射信号计算反射模块与导波雷达物位计表头法兰2的测量距离和根据物位5反射信号计算物位5与导波雷达物位计表头法兰2的测量距离，结合反射模块与导波雷达物位计表头法兰2的实际距离进行计算经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离。The calculation module is used to calculate the measurement distance between the reflection module and the head flange 2 of the guided wave radar level gauge according to the fixed reflection signal, and calculate the distance between the material level 5 and the head flange of the guided wave radar level gauge according to the reflected signal of the level 5 2, combined with the actual distance between the reflection module and the flange 2 of the guided wave radar level gauge head to calculate the actual distance between the material level 5 and the guided wave radar level gauge head flange 2 after compensation.
其中，所述反射模块包括圆筒3，导波杆4穿过圆筒3，所述反射模块与导波雷达物位计表头法兰2的实际距离为400mm或500mm，所述圆筒3直径为11mm，长度为200mm，所述导波杆4直径为8mm。Wherein, the reflection module includes a cylinder 3, the probe 4 passes through the cylinder 3, and the actual distance between the reflection module and the flange 2 of the guided wave radar level gauge head is 400mm or 500mm, and the cylinder 3 The diameter is 11 mm, the length is 200 mm, and the diameter of the probe 4 is 8 mm.
其中，所述采集模块包括：初始化定时器模块、模数转换模块和直接内存存取模块，定时器模块触发模数转换模块进行模数转换，模数转换模块转换完成，直接内存存取模块将模数转换模块转换结果传输到处理器内部随机存取存储器区的数组中。Wherein, the acquisition module includes: an initialization timer module, an analog-to-digital conversion module and a direct memory access module, the timer module triggers the analog-to-digital conversion module to perform analog-to-digital conversion, and the conversion of the analog-to-digital conversion module is completed, and the direct memory access module will The conversion result of the analog-to-digital conversion module is transferred to the array in the internal random access memory area of the processor.
其中，所述计算模块包括：根据比例关系即来进行经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离的计算，式中S1为圆筒3与导波雷达物位计表头法兰2的实际距离，S2为圆筒3与导波雷达物位计表头法兰2的测量距离，L1为经过补偿之后物位5与导波雷达物位计表头法兰2的实际距离，L2为物位5与导波雷达物位计表头法兰2的测量距离。Wherein, the calculation module includes: according to the proportional relationship which is To calculate the actual distance between the material level 5 and the flange 2 of the guided wave radar level gauge after compensation, where S1 is the actual distance between the cylinder 3 and the flange 2 of the guided wave radar level gauge, and S2 is the measurement distance between the cylinder 3 and the flange 2 of the guided wave radar level gauge head, L1 is the actual distance between the material level 5 and the guided wave radar level gauge flange 2 after compensation, and L2 is the distance between the material level 5 and the flange 2 of the guided wave radar level gauge The measurement distance of the flange 2 of the head of the guided wave radar level gauge.
如图2所示，图中虚线波形表示高温高压下的原始回波曲线，实线波形表示其对应的常温常压下的原始回波曲线，根据比例关系有：即由此公式算出补偿之后的实际物位反射距离L1。As shown in Figure 2, the dotted line waveform in the figure represents the original echo curve under high temperature and high pressure, and the solid line waveform represents the corresponding original echo curve under normal temperature and pressure. According to the proportional relationship: which is Use this formula to calculate the actual material level reflection distance L1 after compensation.
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.
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