JP3223669U - Sensor - Google Patents

Abstract

The present invention provides a sensor capable of measuring humidity that can be controlled at a constant level without being influenced by ambient temperature even in a situation where a small amount of measurement is performed under a high pressure such as the amount of impure gas in hydrogen fuel. A sensor 1 is capable of measuring the humidity of a gas even in a pipe or a container under a pressure higher than atmospheric pressure, and includes a detection unit 5 in direct contact with the gas in the pipe or the container. The housing 3 has a structure that can be screwed directly into the housing 3, and the housing 3 has a sensor circuit portion, and the housing 3 has a strength that can withstand a pressure higher than the atmospheric pressure. [Selection] Figure 1

Description

  The present invention relates to a sensor, and more particularly to a sensor capable of measuring humidity.

  The applicant has advanced the development of advanced technologies related to hydrogen fuel, such as a hydrogen fuel adequacy diagnostic device. In this development, it has become necessary to measure the amount of impure gas in hydrogen fuel.

  However, in order to measure the amount of impure gas in hydrogen fuel, it is necessary to always maintain the humidity and temperature of the gas to be measured in the piping and container. Regarding the humidity, the hydrogen fuel is not at atmospheric pressure. Only one existing product that could be used under high pressure was found (Non-Patent Document 1).

Internet <URL: https://www.tekhne.co.jp/products/hygrometer/ee08.html>

  However, although the above existing ones could endure in terms of pressure, they were too large to be suitable for use in pipes or containers. In particular, since the detection unit is large, there is a problem in that constant control cannot be performed as a result of a large amount of gas and being easily influenced by the ambient temperature. Furthermore, from the point of measuring the amount of impure gas in the hydrogen fuel, the humidity of the gas to be measured must always be kept high, and there is also a problem that condensation tends to occur in the flow path.

  Therefore, the present invention provides a sensor capable of measuring humidity that can be controlled at a constant level without being affected by the ambient temperature even in the situation of small amount measurement under high pressure such as the amount of impure gas in hydrogen fuel as described above. The issue is to provide. Furthermore, when measuring the amount of impure gas in hydrogen fuel, there is a situation where high humidity is maintained, but even in that case, a sensor capable of measuring humidity without causing condensation in the flow path is provided. Is an issue.

  A first aspect of the present invention is a sensor that can measure the humidity of a gas even in a pipe or a container under a pressure higher than atmospheric pressure, and includes a detection unit that is in direct contact with the gas in the pipe or the container. The housing has a structure that can be screwed directly into the pipe or the container, the sensor circuit unit is housed in the housing, and the housing is strong enough to withstand a pressure higher than the atmospheric pressure. Have.

  In this way, the sensor circuit unit is housed in a housing that can withstand pressures higher than atmospheric pressure, and the detection unit that is in direct contact with the gas in the pipe or container can be screwed directly into the pipe or container. Even if the casing is small, the measurement can be performed under a high pressure of the amount of impure gas in the hydrogen fuel.

  According to a second aspect of the present invention, in the first aspect, a shape that can be attached in one row with an impure gas amount sensor that measures the amount of impure gas in the hydrogen fuel is provided.

  As described above, the impurity gas amount sensor for measuring the amount of the impurity gas in the hydrogen fuel can be attached in one row, and no dew condensation occurs.

  According to a third aspect of the present invention, in the first or second aspect, the temperature of the gas can also be measured.

  As described above, since not only humidity but also temperature can be measured, it is not necessary to prepare a temperature sensor separately, and humidity and temperature can be measured at the same position.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the detection unit is provided with a corrosion-resistant coating except for a portion of the window that senses the gas.

  In a fifth aspect of the present invention, in any one of the first to fourth aspects, the sensor circuit unit is filled with a filler that prevents gas leakage.

  In a sixth aspect of the present invention, in the fifth aspect, a multi-pin connector for supplying power to the sensor circuit section and taking out a signal can be screwed and fixed to the housing.

  Thus, by using a multi-pin connector, it becomes possible to provide multi-functionality such as other circuit control in addition to power supply and signal extraction.

  In a seventh aspect of the present invention, in the sixth aspect, the connection cord connected to the multi-pin connector is removable.

  In this way, since the connection cord can be removed, it is easy to attach the housing that houses the sensor.

  In an eighth aspect of the present invention, in any of the fifth to seventh aspects, the signal can be extracted from the sensor circuit unit by serial communication.

  According to the present invention, for example, even in situations such as small quantity measurement under high pressure, such as the amount of impure gas in hydrogen fuel, the humidity is reduced while maintaining constant control without being affected by ambient temperature. Can be measured. In addition, it can be reduced in size and mounted in a pipe or container in one row with an impure gas amount sensor that measures the amount of impure gas in the hydrogen fuel, which has an effect on the gas flow in the flow path. It can be made small and does not cause condensation.

It is a figure showing the sensor concerning embodiment of this invention. It is the figure seen from the direction of II of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the present invention is not limited to the following examples.

  FIG. 1 is a view showing a sensor according to an embodiment of the present invention, and FIG. 2 is a view seen from the direction II in FIG.

  The sensor 1 has a sensor circuit portion housed in a metal cylindrical housing 3. One end side of the housing 3 has a structure in which a detection unit 5 that is in direct contact with the gas is provided, and a connection port 7 is provided so that the detection unit 5 side can be directly screwed into a pipe or the like. For example, a PT screw is used as the connection port 7. About the detection part 5, the corrosion-resistant coating is given except the part of the window which senses gas. The corrosion-resistant coating is performed by special coating with a fluororesin coating, and the detection unit 5 is made smaller than the conventional one.

  The sensor circuit part in the housing 3 is filled with a filler from the viewpoint of preventing gas leakage. The sensor 1 has a structure in which a multi-pin connector 9 having multi-functionality such as circuit control is screwed and fixed in addition to power supply to the sensor circuit section and signal extraction. Although not shown, the multi-pin connector 9 has a structure in which a connection cord is detachably attached. Since the connection cord is detachable, the sensor 1 can be easily attached in the pipe. The device is also devised to enable serial communication of signals through this connection cord.

  The casing 3 is made of metal as described above, so that it has a strength that can withstand pressures higher than atmospheric pressure. Measurement, specifically, for example, a small amount measurement under a high pressure such as the amount of impure gas in hydrogen fuel is possible. The overall length is reduced to about 50 mm and the size is reduced. By adopting such a size, it becomes a shape that can be attached to the pipe or container in one row with the impure gas amount sensor, the influence on the gas flow in the flow path can be reduced, and condensation does not occur. ing.

  The sensor 1 can measure not only humidity but also temperature. There is no need to prepare a temperature sensor separately, and humidity and temperature can be measured at the same position.

  DESCRIPTION OF SYMBOLS 1 ... Sensor, 3 ... Housing, 5 ... Detection part, 7 ... Connection port, 9 ... Multi-pin connector

Claims (5)

A sensor capable of measuring the humidity of a gas even under pressure higher than atmospheric pressure in a pipe or container,
A housing having a structure for directly screwing a detection portion in direct contact with the gas in the pipe or the container into the pipe or the container;
A sensor circuit unit is housed in the housing,
The sensor has a strength that can withstand a pressure higher than the atmospheric pressure.   The sensor according to claim 1, wherein the sensor can be attached in one row with an impure gas amount sensor for measuring an impure gas amount in hydrogen fuel.   The sensor according to claim 1, wherein the temperature of the gas can also be measured.   The sensor according to any one of claims 1 to 3, wherein the detection unit is provided with a corrosion-resistant coating except for a portion of the window that senses the gas.   The sensor according to claim 1, wherein the sensor circuit unit is filled with a filler that prevents gas leakage.