Inserting type moisture sensor
A sensor and moisture technology, applied in the field of analytical instruments, can solve the problems of large measurement error, uneven density, inconvenient operation, etc., to achieve the effect of convenient replacement, small test error, and improved sensitivity
Inactive Publication Date: 2013-04-24
窦祥增
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Problems solved by technology
[0002] At present, in the testing of the moisture content of crop seeds such as grain and oil plants, the traditional method is to measure the grain seeds after sealing and packaging. The traditional method is to use the sampling test method. The method is time-consuming and laborious, and the operation is inconvenient
There are also sensors that adopt plug-in type for direct measurement, such as the sensor disclosed in Chinese patent 87100290. The sensor of this structure is suitable for the moisture test of grains such as grains in non-sealed packaging sacks, and cannot carry out the test of grain moisture in sealed bags. The existing plug-in measurement method generally adopts straight rod measurement. This measurement method has a relatively large measurement error due to the size of the package, the height of the layer after loading, or the uneven density of the grain itself due to the impact of pressure.
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[0023] attached figure 1 and figure 2 It is a schematic diagram of the structure of the plug-in moisture sensor. The sensor includes a probe rod and a handle 6 for fixing the probe rod. The probe rod includes a circular insulating frame 11 made of plastic. The insulating frame 11 is fixedly connected to the handle 6. Two groups of plugs are fixed on the insulating frame 11. These two groups of plugs include a first plug 1, a second plug 2, a third plug 3, a fourth plug 4 and a fifth plug 5, the fourth plug 4 is fixed in the middle of the insulating frame 11, and the other four plugs are evenly arranged on the On the same circle with the center of the insulating frame 11 as the center, the second plug 2 and the fifth plug 5 as well as the first plug 1 and the third plug 3 are arranged symmetrically along the center of the insulating frame 11 respectively, and the first group of plugs consists of the first The plug 1, the third plug 3 and the fourth plug 4 are composed and co...
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The invention relates to an inserting type moisture sensor. The moisture sensor comprises a probe rod and a handle used for fixing the probe rod, wherein the probe rod comprises an insulated frameworkfixedly connected with the handle and two electrodes fixedly arranged on the insulated framework; the two electrodes are a group of plugs fixed on the insulated framework respectively, and the electrical insulation is performed between the two groups of plugs; because the insulated framework is evenly provided with the two groups of plugs, the contact area between the sensor and grain is enlarged, the sensitivity of a test signal is improved, and the test error is reduced; the handle is provided with a switch, and the switch is started for measurement after the sensor is stably inserted in the grain, so that a stable measuring result can be obtained, and the sensor is used more conveniently; and the tail of the handle is provided with a socket, and the electrodes are electrically connected with a measuring instrument through the socket, the plugs and connecting wires, and the connecting wires can be conveniently replaced and maintained.
Description
technical field [0001] The invention relates to a sensor, in particular to a plug-in moisture sensor, which belongs to the technical field of analytical instruments. Background technique [0002] At present, in the testing of the moisture content of crop seeds such as grain and oil plants, the traditional method is to measure the grain seeds after sealing and packaging. The traditional method is to use the sampling test method. The method is time-consuming and laborious, and the operation is inconvenient. There are also sensors that adopt plug-in type for direct measurement, such as the sensor disclosed in Chinese patent 87100290. The sensor of this structure is suitable for the moisture test of grains such as grains in non-sealed packaging sacks, and cannot carry out the test of grain moisture in sealed bags. The existing plug-in measurement method generally adopts straight-rod measurement. This measurement method has a relatively large measurement error due to the size of...
Claims
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IPC IPC(8): G01N27/00
Inventor 窦祥增
Owner 窦祥增