Apparatus for the enhancement of water quality in a subterranean pressurized water distribution system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-017/12
A62C-035/68
출원번호
US-0021742
(2001-12-12)
발명자
/ 주소
Newman, Michael R.
대리인 / 주소
Akerman Senterfitt
인용정보
피인용 횟수 :
15인용 특허 :
38
초록▼
An apparatus for enhancing the water quality in a subterranean pressurized water system is disclosed and provides a discharge passage control via a valve that can be actuated electronically at the location of the valve or remotely. The discharge through the apparatus permits the flow of water in the
An apparatus for enhancing the water quality in a subterranean pressurized water system is disclosed and provides a discharge passage control via a valve that can be actuated electronically at the location of the valve or remotely. The discharge through the apparatus permits the flow of water in the subterranean pressurized water system and a corresponding discharge of contaminants and increased concentration of disinfectants supplied to the subterranean pressurized water system by the water system manager. The discharge can occur directly to a below ground drain such as a storm drain, sewer or drain field.
대표청구항▼
An apparatus for enhancing the water quality in a subterranean pressurized water system is disclosed and provides a discharge passage control via a valve that can be actuated electronically at the location of the valve or remotely. The discharge through the apparatus permits the flow of water in the
An apparatus for enhancing the water quality in a subterranean pressurized water system is disclosed and provides a discharge passage control via a valve that can be actuated electronically at the location of the valve or remotely. The discharge through the apparatus permits the flow of water in the subterranean pressurized water system and a corresponding discharge of contaminants and increased concentration of disinfectants supplied to the subterranean pressurized water system by the water system manager. The discharge can occur directly to a below ground drain such as a storm drain, sewer or drain field. element containing a two-dimensional numeric table relating NOx concentration to the first and second pump current detection signals for determining the NOx concentration of the measurement gas based on the first and second pump current detection signals, wherein the first pump element control circuit, the first pump current detection circuit, the second pump element control circuit and the second pump current detection circuit are accommodated within a single housing. 2. The NOx sensor control circuit unit according to claim 1, further comprising an A/D converter circuit for converting into digital signals the first pump current detection signal output from said first pump current detection circuit and the second pump current detection signal output from said second pump current detection circuit. 3. The NOx sensor control circuit unit according to claim 2, wherein said microprocessor further comprises oxygen concentration information generation means for generating information regarding the oxygen concentration of the measurement gas based on the first pump current detection signal which has undergone A/D conversion by said A/D converter circuit and NOx concentration information generation means for generating information regarding the NOx concentration of the measurement gas based on the first pump current detection signal and the second pump current detection signal which have undergone A/D conversion by said A/D converter circuit. 4. The NOx sensor control circuit unit according to claim 3, wherein said microprocessor outputs digital signals, and said NOx sensor control circuit unit further comprises a D/A converter circuit for converting to an analog signal a digital signal related to at least any of the oxygen concentration information, the NOx concentration information, air-fuel ratio information generated on the basis of the oxygen concentration information, and excess-oxygen ratio information generated on the basis of the oxygen concentration information, among digital signals output from said microprocessor, and for outputting a converted analog signal. 5. The NOx sensor control circuit unit according to claim 4, further comprising a display device for displaying at least any of the oxygen concentration of the measurement gas, the NOx concentration of the measurement gas, the air-fuel ratio, and the excess-oxygen ratio on the basis of a digital signal related to at least any of the oxygen concentration information, the NOx concentration information, the air-fuel ratio information generated on the basis of the oxygen concentration information, and the excess-oxygen ratio information generated on the basis of the oxygen concentration information, among the digital signals output from said microprocessor. 6. An NOx sensor system, comprising: an NOx sensor comprising: a first processing chamber which is an internal chamber of the NOx sensor, wherein a measurement gas containing NOx and oxygen is introduced into the first processing chamber via a first diffusion-controlling passage; a second processing chamber which is an internal chamber of the NOx sensor, wherein a gas contained in the first processing chamber is introduced into the second processing chamber via a second diffusion-controlling passage; an oxygen concentration detection element formed of an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to measure the oxygen concentration of gas contained in the first processing chamber; a first pump element formed of an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to pump out oxygen from the first processing chamber; and a second pump element formed of an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to pump out oxygen from the second processing chamber; and an NOx sensor control circuit unit connected to said NOx sensor comprising: a first pump element control circuit for con trolling a voltage applied to the first pump element to thereby control the partial pressure of oxygen in the first processing chamber such that an output voltage from the oxygen concentration detection element becomes substantially constant; a first pump current detection circuit for detecting a first pump current flowing through the first pump element and for outputting a first pump current detection signal indicative of the detected current flowing through the first pump element; a second pump element control circuit for applying a constant voltage to the second pump element in a direction so as to pump out oxygen from the second processing chamber; a second pump current detection circuit for detecting a second pump current flowing through the second pump element and for outputting a second pump current detection signal indicative of the detected current flowing through the second pump element; and NOx concentration information generation means for generating information regarding the NOx concentration based on the first and second pump current detection signals, wherein the first pump element control circuit, the first pump current detection circuit, the second pump element control circuit and the second pump current detection circuit are accommodated within a single housing, said NOx further comprising: a standard characteristics information storage section for storing predetermined standard characteristics information representing correlations among the first pump current, the second pump current and the NOx concentration of the measurement gas; a correction data storage element for storing correction data for making the previously measured characteristics of said NOx sensor equal to the standard characteristics, which characteristics represent correlations among the first pump current, the second pump current, and the NOx concentration of the measurement gas; and a microprocessor implementing said NOx concentration information generation means, wherein said NOx concentration information generation means detects a signal indicative of the first pump current and a signal indicative of the second pump current, corrects the detected values on the basis of the correction data, and generates information regarding the NOx concentration of the measurement gas based on the standard characteristics information. 7. An NOx sensor control circuit unit adapted for use by connection to an NOx sensor, said NOx sensor comprising: a first processing chamber which is an internal chamber of the NOx sensor, wherein a measurement gas containing NOx and oxygen is introduced into the first processing chamber via a first diffusion-controlling passage; a second processing chamber which is an internal chamber of the NOx sensor, wherein a gas contained in the first processing chamber is introduced into the second processing chamber via a second diffusion-controlling passage; an oxygen concentration detection element formed of an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to measure the oxygen concentration of gas contained in the first processing chamber, said oxygen concentration detection element having an internal resistance that varies with element temperature; a first pump element formed on an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to pump out oxygen from the first processing chamber; a second pump element formed of an oxygen-ion conductive solid electrolyte sandwiched between porous electrodes and adapted to pump out oxygen from the second processing chamber; and a heating element for heating the first pump element, the oxygen concentration detection element and the second pump element, said NOx sensor control circuit unit comprising: a first pump element control circuit for controlling a voltage applied to the first pump element to thereby control the partial pressure of oxygen in the first processing chamber such that an
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