JPS58732A - Electronic checker of enclosed vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic checker for sealed containers that uses electrical means to display damage, defects, etc. in a sealed container.

For example, rescue radar beacons used at sea and on the surface of the water are housed in sealed containers in order to prevent malfunctions or deterioration of service life due to moisture absorption of electronic circuits, corrosion of metal, etc. Conventionally, the quality of the sealed state of a container has been determined by visual inspection or by changing the display color of a humidity indicator coated with a moisture absorbent such as silica gel, based on internal humidity and dew condensation.

However, with this visual method there is a risk of missing small tartars or pinholes, and with the manual humidity indicator method, its V&humidity sensitivity is at least 50% relative humidity, and this relative humidity is not suitable for sealing operations. This is a situation that is quite possible under normal environmental conditions, and the humidity indicator will already change color during sealing work, which is an inconvenience in that sealing work must be carried out in a special room with a relative humidity of 50% or less. was there.

The present invention has been made to eliminate these drawbacks, and is designed to detect moisture, humidity, and water absorption within a closed container using a dew condensation sensor, thereby checking for damage to the closed container.

Figure 1 shows an airtight container for rescue radar rice noodles, (1) and (2) are airtight containers, and (3) is a backing or O It's a ring. (4) indicates defects such as cracks and pinholes.

FIG. 2 is a system diagram of the electric circuit O incorporated in the container, in which (6) is a dew condensation sensor, (7) is a voltage comparator, and (8) is a light emitting diode. When a defective part (4) of the sealed container tllK occurs in such a product, or moisture or water is absorbed due to damage to the packing ring (3), the condensation sensor (6) detects this and the DC resistance changes rapidly. In order to prevent damage, this change is replaced with a voltage, which is compared with a voltage comparator (7), and the output lights up a light emitting diode (8) to notify damage.

As described above, according to the present invention, a high-performance checker can be easily manufactured because extremely small damage to the container is not overlooked and there are no restrictions on the atmosphere in which the container is assembled.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing a closed container, and FIG. 2 is a system diagram showing an embodiment of the present invention. In the figure, m (g) is a closed container, (3) is a backing, (4
) is a defective location, (6) is a dew condensation sensor, (7) is a voltage comparator, and (6) is a light emitting diode. Agent Shin Kuzuno - Figure 1 [--j

Claims (1)

[Claims] The present invention is characterized by comprising a dew condensation sensor mounted in a sealed container, a voltage comparator that detects the DC resistance of the dew condensation sensor that changes due to dew condensation, and a light emitting diode driven by the output of the voltage comparison circuit during condensation. Electronic checker for airtight containers.