JPS6177754A - Oxygen sensor unit - Google Patents

Abstract

PURPOSE:To enable the measurement at the optimum state, by unifying a sensor section, a display section and a power source section to form an integration type by directly connecting these sections detachably according to the application mode in the measurement or a separation type by separating a part thereof so as to be connected with a connection cord. CONSTITUTION:A sensor section 1, a display section 2 and a power source section 3 are directly connected detachably with manually mounting screws 11 and 11 provided at the adjacent corner section. Otherwise, a small cylinder sensor case 14 which incorporates a sensor section 13 alone using connection cords 12 and 12 is connected separate from the display section 2. These sections 1-3 thus integrated are connected directly or used by use of a connection cord 12. This facilitates the change or the like by the operation of manually mounting screws 11 and 11 and the plugging or pulling of the connection cords 12 and 12.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is of a small portable type, and the entire unit is divided into three parts: a sensor part, a display part, and a power supply part, and each part can be detachably separated. The present invention relates to a type of oxygen sensor unit.

<Conventional technology> Portable-type oxygen sensors have already been proposed, but although the built-in components are made more compact, the entire device is housed in a single case. It was getting worse.

<Problems to be solved by the invention> For this reason, in the case of this integrated portaple type sensor,
There were various restrictions on its use.

For example, when measuring the oxygen concentration in the air in a deep place such as an underground manhole, if the concentration is unknown before measurement, there may be a danger to human life if the concentration is low. Generally, the air to be measured must be sucked in using a pump or rubber hose and guided to the sensor section. This suction operation is surprisingly troublesome, and after removing the residual air in the hose, the desired suction air (
Problems include the fact that it takes a certain amount of time for the air to be measured (measured air) to arrive, making it impossible to perform quick measurements, and the unavoidable drop in measurement accuracy due to this suction, mixing with residual air in the hose, and other external factors. There is.

In other words, even though the operation is troublesome, accurate measurement may not be expected. In addition, since integrated power supplies are generally DC power supplies and consist of batteries, capacitors, etc., their power lifespans are short, and they may not be compatible with long-term stationary use. .
Means for Solving the Problems> The present invention was made in consideration of the current situation, and in a portable type oxygen sensor, the sensor part,
The display section and power supply section are integrated into a unit, and depending on the method of use during measurement, each section can be connected directly and removably, or a part can be separated and connected with a connecting cord. Consisting of

Therefore, according to the present invention, oxygen concentration measurement, which sometimes involves serious risks, can always be carried out safely and in an optimal state, and can be applied to a wide range of usage modes unprecedented in the past.

<Embodiment> FIGS. 1 to 4 show an oxygen sensor unit according to an embodiment of the present invention.

In the figure, 1 is a sensor section, 2 is a display section, and 3 is a power supply section. The sensor section 1 has a pump for suctioning the gas to be measured and an oxygen sensor therein, and is adapted to measure the oxygen concentration in the gas entering through the inlet 4 protruding from the outside. The display section 2 receives the measurement signal from the sensor section 1 and digitally displays the corresponding oxygen concentration on, for example, a liquid crystal display panel 5. In addition to this display panel 5, there is also a power switch 6 on the side that specifies the oxygen concentration. an alarm switch 7 for emitting a warning sound when the value is below the value;
And a light emitting element 8 for power check on the surface under the display board 5,
An alarm light emitting element 9, a lamp 10 for illuminating the display board 5, etc. are attached. The power supply section 3 has a built-in battery or cells that can be charged and discharged freely, and each of these sections 1 to 3 is attached to a hand mounting screw 11 provided at an adjacent corner as shown in FIG. 11, or alternatively, a connecting cord ''-- as shown in FIG. 5 or 6.
Using the cables 12, 12, a small cylindrical sensor case 14 containing only the sensor 13 inside can be connected away from the display section 2, or the power supply section 3 can be removed and the sensor case 14 can be connected via the AC/DC converter 15. An AC power source can also be connected directly.

In addition, in the case of the above mounting method 11.11, the sensor part 1
and the upper corner of the side surface of the power supply unit 3.
11 is attached loosely, and the male threaded parts 11a and lla on the opposite side are screwed into female threaded parts (not shown) provided at the upper and lower corners of the display section 3.

Further, the direct connection of each of the above-mentioned parts 1 to 3 is not limited to this screw method, but may also be a fitting method. Further, the sensor case 14 and the display section 2 have a built-in jack (not shown) into which the plug 12a of the connection cord 12 is inserted.

In the case of the oxygen sensor unit of the present invention constructed as described above, in the case of an integrated type in which each part 1 to 3 are directly connected, it can be used as a general portable type similar to the conventional one. It is also possible to meet the usage pattern as shown in FIG. In other words, sensor case 14
The sensor case 14 is separated from the display section 2 and connected with the connection cord 12, and the free sensor case 14 is lowered to the deep bottom of the manhole 16 to remotely measure the oxygen concentration in the air stagnant in the lower layer, the concentration of which is unknown. can. Therefore, the measurer is not exposed to any danger.

Moreover, the measurement is extremely simple, as it is only necessary to lower the sensor case 14 into the car to the air area to be measured.

In addition, if such measurements are to be carried out continuously, the built-in power supply section 3 such as a battery can be removed and the connection cord 12 can be used as a stationary type using an AC power source. Furthermore, mutual conversion between the one-piece type and the two-piece type can be made extremely easily by operating the manual mounting screw 11.11 and inserting and pulling out the connecting cord 12.12.

<Effects of the Invention> According to the present invention, as is clear from the above description, in a portable type oxygen sensor, the sensor part, display part, and power supply part are integrated into a unit, and each part can be adjusted according to the usage mode at the time of measurement. This oxygen sensor unit can be used either as an integrated unit that can be detachably connected directly, or as a separate unit that can be separated and connected with a connecting cord. Measurements can always be made safely and in optimal conditions, and can be applied to a wider range of usage than ever before.

[Brief explanation of drawings]

1 to 4 show an integrated oxygen sensor unit according to an embodiment of the present invention, FIG. 1 is a front view thereof, FIG. 2 is a plan view thereof, and FIG. 3 is a left side thereof. side view,
FIG. 4 is a right side view thereof, and FIGS. 5 and 6 are front views showing the case where the oxygen sensor unit is a separate type.
FIG. 7 is a schematic explanatory diagram showing an example of how the separated type is used. In the figure, 1...sensor section, 2...display section, 3...
Power supply section, 11. 11... Not installed, 12... Connection cord, 14... Sensor case. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A sensor section with a built-in pump that measures the oxygen concentration in the gas to be measured, a display section that displays the measurement results of the sensor section, and a power supply section that drives each of the above sections are each made into a unit, and each of these sections can be attached and detached. An oxygen sensor unit characterized in that it can be freely connected directly or connected at an appropriate distance via a connecting cord.