Abstract: A multifunctional signal isolation converter (10) is arranged in a safe area (20), and is applied to an electronic apparatus (40) arranged in a dangerous area (30). The multifunctional signal isolation converter (10) includes a microprocessor (108) and a power supply unit (116). The microprocessor (108) determines whether internal functions of the multifunctional signal isolation converter (10) are normal or not to obtain a first judgment value. The electronic apparatus (40) sends an input signal (42) to the microprocessor (108). The microprocessor (108) determines whether functions of the electronic apparatus (40) are normal or not to obtain a second judgment value according to the input signal (42). The microprocessor (108) controls whether the power supply unit (116) supplies a driving power (122) to the electronic apparatus (40) or not according to the first judgment value and the second judgment value.

Abstract: A calibration method for a capacitance level sensing apparatus (10) is applied for a tank measurement. A measurement signal generating circuit (102) generates a measurement signal (104) to proceed with the tank measurement. According to a measurement result measured through the measurement signal (104), a sensing circuit (108) transmits a sensing signal (110) to a control unit (112). According to the sensing signal (110), the control unit (112) determines whether the sensing signal (110) is in an effective range or not. If the sensing signal (110) is in the effective range, the control unit (112) sets a total capacitance in accordance with the sensing signal (110) as a measurement base value. If the sensing signal (110) is not in the effective range, the control unit (112) controls the measurement signal generating circuit (102) to adjust a measurement frequency of the measurement signal (104).

Abstract: A calibration method for a capacitance level sensing apparatus (10) is applied for a tank measurement. A measurement signal generating circuit (102) generates a measurement signal (104) to proceed with the tank measurement. According to a measurement result measured through the measurement signal (104), a sensing circuit (108) transmits a sensing signal (110) to a control unit (112). According to the sensing signal (110), the control unit (112) determines whether the sensing signal (110) is in an effective range or not. If the sensing signal (110) is in the effective range, the control unit (112) sets a total capacitance in accordance with the sensing signal (110) as a measurement base value. If the sensing signal (110) is not in the effective range, the control unit (112) controls the measurement signal generating circuit (102) to adjust a measurement frequency of the measurement signal (104).

Abstract: A multifunctional signal isolation converter (10) is arranged in a safe area (20), and is applied to an electronic apparatus (40) arranged in a dangerous area (30). The multifunctional signal isolation converter (10) includes a microprocessor (108) and a power supply unit (116). The microprocessor (108) determines whether internal functions of the multifunctional signal isolation converter (10) are normal or not to obtain a first judgment value. The electronic apparatus (40) sends an input signal (42) to the microprocessor (108). The microprocessor (108) determines whether functions of the electronic apparatus (40) are normal or not to obtain a second judgment value according to the input signal (42). The microprocessor (108) controls whether the power supply unit (116) supplies a driving power (122) to the electronic apparatus (40) or not according to the first judgment value and the second judgment value.

Abstract: A level transducer has a power supply module, a tuning fork module, a sensing-phase corrector and a controller. The tuning fork module has a tuning fork, at least one piezoelectric driving element, and at least one piezoelectric sensing element. The at least one piezoelectric driving element and the at least one piezoelectric sensing element are stacked on each other, and are mounted on the tuning fork. The power supply module is electrically connected and outputs a voltage to the at least one piezoelectric driving element to deform the at least one piezoelectric driving element. The at least one piezoelectric sensing element is extruded and outputs a voltage signal. The sensing-phase corrector obtains the voltage signal and outputs a clock signal to feedback control the voltage on the at least one piezoelectric driving element to optimize a deformation frequency of each piezoelectric element.

Abstract: A self-alignment filling level detecting device has a reflector and a sensor detachable from each other. The sensor has a light emitter, a light sensor, and a controller. The light sensor receives different light intensities when the reflector is assembled to the sensor and when the reflector is not assembled to the sensor. Thus, the controller determines whether the reflector has been accurately engaged and aligned with the sensor or not based on sensing results of the light sensor. Since the reflector and the sensor are detachable from each other, either the reflector or the sensor can be replaced individually if any one of them malfunctions.

Abstract: A level transducer has a power supply module, a tuning fork module, a sensing-phase corrector and a controller. The tuning fork module has a tuning fork, at least one piezoelectric driving element, and at least one piezoelectric sensing element. The at least one piezoelectric driving element and the at least one piezoelectric sensing element are stacked on each other, and are mounted on the tuning fork. The power supply module is electrically connected and outputs a voltage to the at least one piezoelectric driving element to deform the at least one piezoelectric driving element. The at least one piezoelectric sensing element is extruded and outputs a voltage signal. The sensing-phase corrector obtains the voltage signal and outputs a clock signal to feedback control the voltage on the at least one piezoelectric driving element to optimize a deformation frequency of each piezoelectric element.

Abstract: The invention relates to a self-calibration method for a photoelectric liquid level switch and apparatus using the same. The apparatus has a control module, a light emitting module and a light sensing module. The light emitting module emits a light beam into a container. The light sensing module then detects a reflected light beam. The control module acquires two values respectively standing for a first liquid level status and a second liquid level status. When a default threshold value is beyond a range between the two values, the control module calculates a new threshold value in the range between the two values. The control module then replaces the default threshold value with the new threshold value. The threshold value is adjustable for any kind of liquid.

Abstract: A self-alignment filling level detecting device has a reflector and a sensor detachable from each other. The sensor has a light emitter, a light sensor, and a controller. The light sensor receives different light intensities when the reflector is assembled to the sensor and when the reflector is not assembled to the sensor. Thus, the controller determines whether the reflector has been accurately engaged and aligned with the sensor or not based on sensing results of the light sensor. Since the reflector and the sensor are detachable from each other, either the reflector or the sensor can be replaced individually if any one of them malfunctions.