JPS59160749A - Multipoint type automatic ion analyzing device by suction of gas - Google Patents

Abstract

PURPOSE:To enable exact analysis of ions having different mobilities by spacing the connecting conductor for a collecting electrode as apart as possible from an impressing electrode so that the collecting electrode is not affected by the voltage on the impressing electrode for changing the mobility density of the ions. CONSTITUTION:A device is constituted of a measuring section A having a shielding electrode 1 and a gas intake mechanism B provided successively to the front end of the shielding electrode. The mechanism B is connected via a fixing plate 12 to a tubular dody 13 extending to an intended measuring point by turning the bend 11 of said mechanism, and measurement is performed. The section A is constituted by supporting independently an impressing electrode 2 and a collecting electrode 3 by means of insulators 4, 5 in the electrode 1 having a cylindrical shape. The electrode 3 and the external measuring mechanism are connected by a conductor 6 spaced as apart as possible from the electrode 2. If the device is constituted in the above-mentioned way, the leakage current generated on the surface of the insulator 4 by the DC high voltage impressed on the electrode 2 or the electric charge accumulated in the insulator 4 is fully grounded and gives no influence on the electrode 3 and therefore the ion current is measured exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas 111j type ion analyzer equipped with a switching suction mechanism for gas (atmosphere) from a plurality of separated locations.

Generally, an electroscope and a 0M counter tube are used to measure ions in vacuum, various gases, or the atmosphere.

Ionization chambers and other measuring equipment are used.

However, with conventional measuring instruments, the measurement point is limited to one location.
In addition, there has been a difficulty in accurately and stably continuously measuring positive ion and negative ion densities, their mobility distributions, etc.

The reason for this is that when a DC voltage is applied to the applied electrode because it is necessary to create an electric field within the shield electrode where gas (atmosphere) flows, this voltage acts on the collector electrode through the insulator that supports the electrode. .

Furthermore, if mechanical vibrations during operation of the suction mechanism connected to the shield electrode are transmitted to the collector electrode and the application electrode, this vibration causes errors in the measured values.

The present invention was invented in view of the above-mentioned points, and is
! ! Since the electrode is completely unaffected by the applied electrode voltage due to changes in ion mobility density, it is possible to easily and accurately analyze ions with different mobilities by varying only the applied voltage. It is possible to switch between a plurality of set remote locations at will. 4 An embodiment of the present invention will be described below with reference to the drawings. In the figure, (A) the measurement part with l″ii shield electrode, (B)
indicates a gas intake mechanism connected to the front end of the shield electrode.

The measurement part (A) has an application electrode (2) and a collector electrode (3) each supported independently with insulators (4) and (5) inside a cylindrical shield electrode (υ). ) and the external measurement mechanism (7) are connected using a conductor (6) separated as much as possible from the application electrode (2).The application electrode (2) can control the polarity and voltage with respect to the DC power supply (8). A timer is interposed between the power supply device (8) and the measuring mechanism (7) to make the measurement time by the measuring mechanism (7) variable. .

The gas intake mechanism (B) has an axial center 'f, an deviated front and rear opening (1
1a) Bent pipe (llb) connected with slope @ (llc)
(b) Connect the rear end (Ilb) of the shield electrode (1) to the front end (Ilb) of the shield electrode (1).
a fixed plate which is rotatably connected to the rear opening (llb) and has a plurality of gates (12a) corresponding to the rotation locus of the front opening (ll&) when rotating around the rear opening (llb); (6) is distributed.

Each opening (+28) of this fixing plate (b) is connected to a pipe introduced to a planned gas failure point, and if necessary, a filter (u4) is detachably attached to the entrance.

The middle section in Figure 1 is a vibration absorbing tube that connects the rear end of the shield electric & (1) to an external measurement mechanism (not shown).

A flexible negative phase made of rubber or synthetic/resin absorbs mechanical vibrations during operation of the suction mechanism.

Next, the operation of the above configuration will be explained.

First, a measurement point is determined, the curved tube (6) is rotated one k, and is connected via the fixed plate (2) to the tube body (6) extending to the planned measurement point, and a predetermined measurement is performed. If necessary, fix the fixing plate (6
) Attach filter α4 to the opening of the curved pipe (b)'! ! i- Perform measurements by changing the gas intake point by rotating at the appropriate time.

However, in order to measure positive ions and negative ions, a positive electric field or a negative electric field is required, and furthermore, in order to measure the mobility distribution of ions, etc., the applied voltage is automatically varied σ. Furthermore, as another embodiment of the present invention, the collector electrode (3) is divided into two as shown in FIG. Except for ions, only ions in the desired mobility range are measured using the second collecting electrode (3b).By changing the division ratio and the applied voltage to positive or negative voltage, positive ions in various mobility ranges can be measured. , negative ion density can be measured. Note that the first collector electrode (8a) and the second collector electrode (3b) can also be integrally connected by an insulator.
Furthermore, the first collecting electrode (3a) is not only connected to the ground, but also connected to a measuring instrument for measurements.

The present invention has a shield electrode (
For 1), the applied voltage & (2) and the collector electrode (3) are.

Seven independent insulators L4) <! The conductive wire (6) which is supported by the . The leakage current generated on the surface of the insulator (4) due to the high DC voltage applied to the insulator (2), or the electric current accumulated on the insulator (4), is all grounded and is connected to the collector electrode (3). There is no influence at all, and electrical changes in the voltage applied to the conductor (6) are completely blocked, so that only ionic current flows through the conductor (6), and this can be accurately measured.

In addition, when performing ion measurement by actively sucking air into the shield electrode (1) and making it flow by operating the elm, a vibrating suction tube (a) is used to connect the shield electrode (1) and the suction mechanism. Since the device is used, mechanical vibrations to the device due to the operation of the suction mechanism are completely blocked Ifδ, and errors in measurement values due to such vibrations do not occur.

In addition, in the present invention, a gas failure mechanism (B) is installed at the front end of the shield electrode, which allows gas to flow from multiple isolated points, making it possible to compare measurement data at each point, making it more accurate and more efficient. The practical benefits of obtaining clear measurement results are enormous.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is a front view of a fixing plate, and FIG. 3 is an M sectional view of another embodiment. (1)...shield electrode, (2)...applying electrode, (3)
・・Collector electrode, (4) (5)・・Insulator, (6)・・Conductor, (7)・・Outside S measurement mechanism, (8)・・Electrical #, device, (
9) Selector, (7) Timer, (B) Bent tube, (6) Fixed plate, CF3 tube, α repellent filter, 4 Vibrating suction tube, 9 ...Choice switch, q7
)...Measuring instrument. Name of patent attorney representing the applicant: Kado 1) Yoshihiro

Claims (2)

[Claims] (1) A gas intake mechanism is installed at the front end of the cylindrical shield electrode to allow gas to enter from multiple points, and a filter can be attached or removed as needed depending on the atmospheric condition. The voltage applying electrode and the current collecting electrode are each supported concentrically through an insulator, and the conducting wire connected to the collecting electrode is pulled out to the outside as far as possible from the applying electrode, and the polarity of the applying electrode is changed. It is possible to automatically control the voltage and set the measurement time, and is connected to a power source, and after the cylindrical shield electrode +11i1 is connected to a suction mechanism through a vibration absorbing tube made of rubber material or the like. Multi-point gas suction ion automatic analyzer. (2) The collector electrode supported within the shield electrode has a divided configuration, and each divided collector electrode can be individually connected to a measuring mechanism and grounded. Multi-point gas suction ion automatic analyzer.