CN2153060Y - 快速粮食水分测试仪 - Google Patents

快速粮食水分测试仪 Download PDF

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Publication number
CN2153060Y
CN2153060Y CN 93207733 CN93207733U CN2153060Y CN 2153060 Y CN2153060 Y CN 2153060Y CN 93207733 CN93207733 CN 93207733 CN 93207733 U CN93207733 U CN 93207733U CN 2153060 Y CN2153060 Y CN 2153060Y
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water tester
quick
constant current
voltage stabilizer
model
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程新
程军
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Abstract

本实用新型提供了一种测量农作物含水量的快 速粮食水分测试仪。本实用新型是由前、后两部分扣 合的绝缘壳体表面固定的微安表μA、电源开关K、 电容C1、壳体一侧内对应两内壁设有金属极板Cx的 测量筒及壳内的印刷线路板上的电子器件组成的振 荡测量、恒流稳压电路实现的。该实用新型具有结构 简单、价格便宜、携带方便、测量速度快、稳定性好、适 用性强等优点。

Description

本实用新型涉及一种测量农作物含水量的电测装置。
已有的粮食水份测试仪大体可分为两种,一种是将一定重量的粮食放入恒温箱加热烘干,再经计算测出被测粮食的含水量。该测试仪数据准确但测试时间太长,远不能满足粮食收购部门验粮和农民储粮的需要。另一种是采用固定式测量,虽提高了测试速度但对含水较高的粮食测试数据不准确。
本实用新型的目的是要提供一种即适宜高、低水份粮的测试,又快速、准确的快速粮食水份测试仪。
本实用新型的任务是由前、后两部分扣合的绝缘壳体表面固定的微安表、电源开关、调整电容、壳体一侧内对应两内壁设有金属极板的测量筒及壳内的印刷线路板上的电子器件组成的振荡测量、恒流稳压电路来实现的。
其振荡测量电路是以对应的两个高频晶体三极管BG1、BG2和石英晶体JT1、JT2组成的多谐振荡器为信号源,并将信号与两金属极板形成的电容Cχ串联,再经由二极管D3-D6检波输出。
其恒流稳压电路是将直流电源接入稳压器IC1,IC1输出端经串联电阻R7、R8取分压加入稳压器IC1控制端,该控制端同时对地接有电位器W,稳压器IC1输出电压经稳压管D7二次稳压。
其测量筒为空心的绝缘长方体,该测量筒上、下底分别设有推拉式活动盖,金属极板镶嵌在靠近底部的内壁上。
本实用新型具有结构简单、价格便宜、携带方便、测试速度快、稳定性好、适用性强等优点。
结合附图说明实施例:
图1是快速粮食水份测试仪的电原理接线图。
由图1可知,本实用新型的组装是先将两个金属极板Cχ镶在测量筒靠近底部的前、后两侧内壁上,然后将微安表μA、电源开关K和零点调整电容C1固定在前壳上,把已焊好并带有连接引线的两部分电路的印刷线路板固定在微安表μA后面的长螺丝上。同时将表头连接。加屏蔽罩,再把引线对应接入两金属极板Cχ、电源开关K、零点调整电容C1和电池座,放入9V电池,扣后壳,螺钉连接前后壳,推入上、下活动盖。
使时用,先打开电源开关K,检查微安表μA指示是否为零若有偏转,可调零点调整电容C1至微安表μA指零为止。打开测量筒的上活动盖,将150克待测粮食倒入测量筒,恰好装满,微安表μA即刻指示,该读数即为被测粮食的含水量。

Claims (4)

1、一种水份测试仪,特别是一种快速粮食水份测试仪,其特征在于设置了前、后两部分扣合的绝缘壳体表面固定的微安表μA、电源开关K、调整电容C1、壳体一侧内对应两内壁设有金属极板CX的测量筒,及壳内印刷线路板上的电子器件组成的振荡测量、恒流稳压电路。
2、根据权利要求1所述的快速粮食水份测试仪,其特征在于振荡电路是以对应的两个高频晶体三极管BG1、BG2和石英晶体JT1、JT2组成的多谐振荡器为信号源,并将信号与两金属极板形成的电容Cχ串联。
3、根据权利要求1所述的快速粮食水份测试仪,其特征在于恒流稳压电路是将直流电源接入稳压器IC1,将稳压器IC1输出端的串联电阻R7、R8取分压加入稳压器IC1的控制端,控制端对地接有电位器W,稳压器IC1输出端对地接有稳压管D7
4、根据权利要求1所述的快速粮食水份测试仪,其特征在于设有金属极板Cχ的测量筒是个空心的绝缘长方体,该测量筒上、下分别有推拉式活动盖。
CN 93207733 1993-03-25 1993-03-25 快速粮食水分测试仪 Expired - Fee Related CN2153060Y (zh)

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CN 93207733 CN2153060Y (zh) 1993-03-25 1993-03-25 快速粮食水分测试仪

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CN 93207733 CN2153060Y (zh) 1993-03-25 1993-03-25 快速粮食水分测试仪

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104897736A (zh) * 2015-06-24 2015-09-09 扬州天扬粮油机械制造有限公司 一种电阻式水分仪

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104897736A (zh) * 2015-06-24 2015-09-09 扬州天扬粮油机械制造有限公司 一种电阻式水分仪

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