摘要:
An electrostatic capacity type liquid state detecting sensor includes an outer tubular electrode, and an inner electrode disposed within the outer tubular electrode and having an insulation layer at an outer surface portion to be brought into contact with liquid contained in a container for detection of a state of the liquid, wherein the thickness of the insulation layer is less than 500 μm and not less than 100 μm.
摘要:
The present invention provides a capacitive liquid state sensor configured to release a pressure in an intervening gap by providing slits to an outer tubular electrode while inhibiting decrease in strength caused by forming of the slits. The outer tubular electrode 20 disposed with a predetermined distance from an inner electrode 20 is formed with a plurality of slits 14, 15 and 16 along a generator (indicated by one-dot chain line A) extending from a front end portion 11 to a rear end portion 12. Between the slits 14, 15 and 16 are positioned intermediate no-slit formed areas 17 and 18. Circulation of liquid between the inside and the outside of the outer tubular electrode 10 and in the axial direction of the same electrode 10 is attained through the slits 14, 15 and 16, so that a pressure accompanied by volumetric expansion of liquid at the time of freezing and existing in the intervening space can be released to the outside. Further, by the provision of the intermediate no-slit formed areas 17 and 18, the outer tubular electrode 10 can maintain a good strength so that deformation of the outer tubular electrode 10 can be prevented effectively.
摘要:
A liquid-condition detection sensor (1) includes a concentration sensor element (260) for detecting the condition of liquid to be measured; a wiring board (40) including a driving control circuit (41) disposed above the concentration sensor element (260); a cable (50) mechanically connected to the wiring board (40), extending downward from the wiring board (40), and establishing an electrical connection between the driving control circuit (41) and the concentration sensor element (260); an inner tube (221) surrounding at least a portion of a cable (50) in a loose condition; and a fixing holder section (94) fixedly holding a portion (51) of the cable (50) located between the wiring board (40) and the concentration sensor element (260).
摘要:
A liquid state detecting apparatus including a detecting element which outputs a signal associated with a concentration of a particular component of a liquid contained in a liquid container; an abnormality determination unit which determines whether or not the liquid is in a particular abnormal state based on the output signal of the detecting element, a level detecting part which outputs a signal according to a level of the liquid contained in the liquid container; and a static state determination unit which determines whether or not the liquid in the liquid container is in a static state based on the output signal from the level detecting part, wherein the determination made by the static state determination unit is reflected in the determination made by the abnormality determination unit.
摘要:
A gas sensor (10) including a measurement chamber (28) into which a gas GS is flown and a detection element main body (40) facing the measurement chamber (28). The detection element main body (40) includes an element case 42, and a protective film (48) is adhered to a bottom surface thereof. An acoustic matching plate (50) and a piezoelectric element (51) of a substantially columnar shape and a tube body (52) provided in a position surrounding the acoustic matching plate 50 and the piezoelectric element 51 are housed in the element case (42). A filler is then introduced into the element case (42), whereby the acoustic matching plate (50), the piezoelectric element (51), and the tube body (52) are sealed by a filled layer (99).
摘要:
Method and sensor for measuring accurate measurement of NOx concentration in an exhaust gas containing O2,H2O, CO2 and NOx and a NOx gas concentration sensor. A first oxygen pump cell sufficiently pumps out oxygen in a measurement gas such as not to decompose NOx. A pair of electrodes is provided on an inner side and an outer side of a second measurement chamber into which the gas is introduced from a first measurement chamber via a diffusion resistance. A voltage is impressed across the paired electrodes for decomposing NOx in the second measurement chamber to dissociate oxygen which causes the current to flow in a second oxygen ion pump cell. The NOx gas concentration is measured for this current. The voltage impressed across the paired electrodes of the second oxygen ion pump cell is set so as not to dissociate H2O and CO2 present in the second measurement chamber.
摘要:
An ultrasonic-wave propagation time measuring method which enables determination of accurate propagation time, a gas-pressure measuring method, a gas-flow-rate measuring method, and a gas sensor. A reception wave which has been transmitted and received by an ultrasonic element 5 is shaped and integrated by an integration circuit 67 to obtain an integral value. A peak value of the integral value is held by a peak-hold circuit 39. As to detection of gas concentration, a resistance-voltage-division circuit 41 sets a reference value on the basis of the peak value, and a point in time when the integral value of the reception wave is judged by a comparator 43 to have reached the reference value is regarded as an arrival time. Subsequently, a gas concentration is detected on the basis of a period between the emission time and the arrival time. As to detection of gas pressure and flow rate, the gas pressure is detected on the basis of the peak value, and further, the gas flow rate is calculated on the basis of the gas pressure.
摘要:
When a sensor has deteriorated, the propagation time T1′ of a first reflection wave becomes greater than the propagation time T1 of a first reflection wave as measured in a new sensor. If measurement of the concentration of a specific gas is based on the propagation time T1 of the first reflection wave as measured in the new sensor, gas concentration cannot be determined accurately. By contrast, a reflection wave other than the first reflection wave (for example, a second reflection wave) is merely reflected off the surface of the ultrasonic element and is not affected by the internal structure of the ultrasonic element. Therefore, even when the sensor is deteriorated, the propagation time T2, T2′ of the second reflection wave exhibits less variation and is less susceptible to deterioration of the sensor. Therefore, the concentration of a specific gas is determined on the basis of the propagation time of the second reflection wave, which is less susceptible to deterioration of the sensor, instead of the propagation time of the first reflection wave, which is more susceptible to deterioration of the sensor. Thus, gas concentration can be measured accurately.
摘要:
A microprocessor having a on-chip redundant control unit is disclosed. This processor includes a set of data terminals, an execution unit and a data bus buffer coupled between the set of data termianls and the execution unit, and the data bus buffer fetches data on the set of data termianls in resopnse to a first timing signal and transfers the fetched data to the execution unit in response to a second timing signal. The on-chip redundant control unit receives the fetched data and redundant information and checks the validity of the fetched data in response to the redundant information before the generation of the second timing signal, so that an effective memory access time is not prolonged.
摘要:
An address generation system comprising a decoder for decoding an addressing field of a given instruction code, and a control circuit connected to the decoder to cause a register to be read out in accordance with the decoded information. A hold circuit is connected to the decoder to hold an address generation information for generating an address of an operand. A correction number generator is connected to the hold circuit to generate a correction number determined in accordance with the address generation information for the designated register. An adder is provided to receive the correction number and the content read out from the register and to output the content of the register modified by the correction number.