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A complete English edition of this article has not been published. The complete available Chinese version is shown below.

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Measuring principles4 min readContent language: ChineseUpdated 23 October 2026

FMCW雷达与脉冲雷达的测量思路有什么不同?

调频连续波和脉冲都可用于测距,不能仅凭名称判断适用性。

两种方法都要识别目标回波

脉冲雷达发出短脉冲并分析往返传播时间;FMCW雷达发出频率随时间变化的连续信号,通过发射与回波的频率关系求距离。两者处理方式不同,但最终都需要从容器内多个反射中认出真实料面。

不能把原理名称当成完整性能表

频率、天线、接收灵敏度、回波算法和安装环境共同影响结果。同为FMCW或同为脉冲,不代表有相同盲区、量程、精度和抗干扰能力。选型仍应回到具体版本的技术资料,而非简单认为某一种原理必然适合全部介质。

询价时怎样比较才有意义

把同一罐体尺寸、最低最高物位、介质与干扰条件交给技术人员,再比较安装可行性和交付范围。若要求替换原有雷达,还应保留旧型号、天线与典型回波记录,让比较落在同一个工况上。

比较原理时要带上的资料

原理说明用于帮助理解,真正比较两个方案时,要把下面这些条件放进同一张技术比较表。

  • 核对候选型号的完整订货代码和资料版本,不将同一品牌其他系列的FMCW或脉冲性能直接视作本型号的能力。
  • 逐项比较实际天线、近区限制、测量跨度和过程条件,并标记哪些数值来自标准参考条件,哪些已得到工况确认。
  • 说明需要稳定库存显示还是快速跟踪加料,要求候选方案分别描述动态响应和干扰条件,不能只比较静止读数。
  • 列明旧安装孔、接线与维护工具能否复用,以及改造和调试是否计入报价;原理先进程度不能替代总交付成本。

假设比较:同一罐的两个候选方案

假设客户拿到两款采用不同测量方式的报价,一款强调调频,一款强调脉冲。销售先不以名称宣布优劣,而是把客户的长接管、低液位和搅拌条件交给两套方案核对。如果其中一款需要改安装孔,应把改造时间和费用列出来;另一款即使可以原孔安装,也应验证最高最低料位的回波和输出。最后将能够证明的适配条件、未验证条件和报价范围并列,交由客户选择。这个假设比较的是工程完整性,不推导任何原理或品牌在所有应用中的排名。

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