Abstract: A test probe with a dual switching probe tip includes an insulating sheath, a conductive wire and a complex probe tip, and an end of the conductive wire is passed and connected into the insulating sheath. The complex probe tip includes a connecting section, and a first measuring head and a second measuring head extended in opposite directions from both ends of the connecting section respectively, and the first and second measuring heads are measuring heads of two different specifications and electrically connected with each other, and the connecting section is selectively combined with the insulating sheath, and the first measuring head is exposed from the insulating sheath or accommodated in the insulating sheath and electrically connected to the conductive wire. The probe tip can be switched and installed at the insulating sheath to extend the using life of the test probe or meet the requirements of fitting different specifications.

Abstract: A probe tip coating structure for test probes includes a probe tip body and a coating element, and the probe tip body includes a rod and a probe head integrally formed a front end of the rod, and the external diameter of the rod is not greater than the external diameter of a base of the probe head, and the coating element is coated on the rod and forms a continuing section securely combined with the exterior of the rod, and a seat is coupled to an end of the continuing section and provided for assembling the test probe, such that the coating element is formed on the probe tip, and the external diameter of the coating element is close to that of the probe tip and the coating element can be securely combined with the probe tip without the risk of getting loosened or falling apart.

Abstract: A measuring apparatus for capacitor is applied to a charging power source and a capacitor to be measured. The measuring apparatus for capacitor includes a microcontroller unit, an analog-digital converter unit, a charging-side switch unit, a charging-side resistor unit, a discharging-side switch unit and a discharging-side resistor unit. The capacitor to be measured is charged and discharged by the charging-side switch unit and the discharging-side switch unit controlled by the microcontroller unit. The charging and discharging voltage and time variation of the capacitor to be measured are measured by the analog-digital converter unit to calculate the capacitance value of the capacitor to be measured.

Abstract: A clamp meter for measuring voltage and current simultaneously includes a microcontroller unit, a current-side analog-digital converter unit electrically connected to the microcontroller unit and a current-measuring unit, a voltage-side analog-digital converter unit electrically connected to the microcontroller unit and a voltage-measuring unit. By providing dedicated analog-digital converter unit to the current-measuring unit and the voltage-measuring unit, the clamp meter is capable of measuring voltage and current precisely and simultaneously.

Abstract: The test probe assembly of the invention is used for an electric meter such as a multimeter or the like. The electric meter has a main body. The test probe assembly includes a pair of insulated rods, a pair of probe tips and a pair of leads. The insulated rods are separately provided with two corresponding engaging portions, so that the insulated rods can be combined or detached. One end of each probe tip is fixed in one of the insulated rods and the other ends are protrudent. The leads connect between the insulated rods and main body. The combination or detachment of the test probe assembly may form a variety of configurations for different measured objects.

Abstract: The multimeter of the invention includes main body, a current sensor and a flexible tube. The main body is provided with a display. The current sensor is electrically connected to the main body via a wire. The flexible tube is connected between the main body and current sensor. And the wire is accommodated in the flexible tube. Therefore, the current sensor can be adjusted to any direction, angle and position.

Abstract: A multimeter with filtered measurement mode is disclosed. The multimeter includes a signal conditioning circuit, a low-pass filter, a microprocessor, a measurement circuit, a root-mean-square (RMS) converter, a display unit, and an external rotary switch. The signal conditioning circuit receives a control signal to select an operation mode of the multimeter. The low-pass filter is electrically connected to the signal conditioning circuit. The microprocessor is electrically connected to the signal conditioning circuit. The measurement circuit is electrically connected to the microprocessor and the RMS converter to measure a signal outputted from the RMS converter. The display unit is electrically connected to the microprocessor and the measurement circuit. Also, the external rotary switch is optionally connected to the microprocessor. Whereby rotating the external rotary switch to generate the control signal and perform a low-pass filtering mode to communicate the low-pass filter with the RMS converter.

Abstract: A large current flowing out from video signal line driver is prevented whenever the video signal line is being grounded. The system includes a video signal line driver circuit transmitting video signal at pre-determined DC level, a large current prevention circuit detecting video signal line being shorted to ground and cut-off excessive current source out from video signal line driver circuit into video signal line, a start-up time enhancement circuit improving start-up time of ground detection circuit so that system start-up time is not limited by large current prevention circuit, and a switching threshold control circuit setting the switching threshold of large current prevention circuit and start-up time enhancement circuit.

Abstract: An electric meter having a detachable measuring bar includes a main body, a first measuring bar and a second measuring bar assembly. One end of the main body is formed with a supporting portion. The first measuring bar has a connecting portion and a probe formed at the other end of the connecting portion. The connecting portion is detachably connected with the supporting portion of the main body. The second measuring bar assembly comprises a second measuring bar and a lead. Both ends of the lead are connected to the main body and the second measuring bar. Via this arrangement, when the first measuring bar is worn or damaged in use, the first measuring bar can be replaced, thereby reducing the purchasing cost of the electric meter.

Abstract: A large current flowing out from video signal line driver is prevented whenever the video signal line is being grounded. The system includes a video signal line driver circuit transmitting video signal at pre-determined DC level, a large current prevention circuit detecting video signal line being shorted to ground and cut-off excessive current source out from video signal line driver circuit into video signal line, a start-up time enhancement circuit improving start-up time of ground detection circuit so that system start-up time is not limited by large current prevention circuit, and a switching threshold control circuit setting the switching threshold of large current prevention circuit and start-up time enhancement circuit.

Abstract: To estimate a far-field signature of a seismic source having plural source elements, seismic receivers are provided to receive signals from the seismic source elements of the seismic source. Seismic receivers are dynamically associated with different seismic source elements over time, and the far-field signature of the seismic source is computed according to the measurement data taken by the seismic receivers.

Abstract: An electric meter having a detachable measuring bar includes a main body, a first measuring bar and a second measuring bar assembly. One end of the main body is formed with a supporting portion. The first measuring bar has a connecting portion and a probe formed at the other end of the connecting portion. The connecting portion is detachably connected with the supporting portion of the main body. The second measuring bar assembly comprises a second measuring bar and a lead. Both ends of the lead are connected to the main body and the second measuring bar. Via this arrangement, when the first measuring bar is worn or damaged in use, the first measuring bar can be replaced, thereby reducing the purchasing cost of the electric meter.

Abstract: An audiovisual capture device, with its special structural design, can be installed on a lamp socket or a power socket, and is assembled or formed with an electric assembly part at one end of the audiovisual capture device, allowing the audiovisual capture device to be assembled at the lamp socket or the power socket by using this electric assembly part, so as to achieve functions of fixing and of conducting electric current, at a same time. In addition, electronic signals can be transmitted by using the lamp socket or the power socket, simultaneously.

Abstract: A rotatable camera comprises a camera and a fixing seat, wherein the camera and the fixing seat are assembled respectively with a coil for electrical conduction, such that after the camera and the fixing seat are assembled, an electric conduction can be accomplished by the coils, allowing the camera to rotate by 360 degrees without having interference points, so as to achieve a function of monitoring without having blind angles.

Abstract: An improved tail structure of an electric wire. The tail structure has a hard terminal with one end connected to a soft electric wire. The junction between the hard terminal and the soft electric wire has a softened buffering structure. The periphery of the hard terminal is wrapped with a soft layer, which extends across the junction to wrap a part of the periphery of the electric wire as well as the buffering structure, such that the junction of the hard terminal and the electric wire is reinforced.