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35results about How to "Simple external connection" patented technology

Rock debris flow measuring device and method

The invention discloses a rock debris flow measuring device and method. The rock debris flow measuring device comprises a weighing and sand pouring assembly outer framework and a control box which areconnected together. A weighing sensor is arranged at each of the bottoms of the two sides of the weighing and sand pouring assembly outer framework. Bearing support installation plates are installedon the weighing sensors, bearing supports are installed on the bearing support installation plates, and bearings are installed in bearing installation holes in the bearing supports in an interferencefit mode. Check blocks are installed on the inner sides of the bearing supports, air cylinder installation frames are installed on the outer sides of the bearing supports, and rotary air cylinders areinstalled in the air cylinder installation frames. According to the rock debris flow measuring device, wireless communication and battery power supply modes are adopted, external connection of the measuring device is greatly simplified, the rock debris flow measuring device can work only by being externally connected with one power gas pipeline, and field installation is facilitated; and the sandpouring and resetting are pneumatically driven, so that compared with motor driving, the weight of the measuring device is greatly reduced, and on-site carrying and mounting are facilitated. The rotary air cylinders directly drive a sand receiving disc to pour sand and reset, and the driving mode is simple and reliable.
Owner:中国电波传播研究所

Method for testing transmission function of ultrashort radio station

The invention belongs to the field of avionics, and proposes a method for testing a transmission function of an ultrashort radio station. The method comprises the steps that an audio signal transmission unit (4) enables an analog voice signal from an audio signal generator to be filtered and amplified and then transmitted to a signal processing unit (3); a 429 data transmission and control/display unit (2) generates working frequency information, and the working frequency information is compared with the working frequency information of the ultrashort radio station of an ultrashort radio station connector (1); the ultrashort radio station connector (1) selects working frequency of the ultrashort radio station, wherein the working frequency is consistent with the working frequency generated by the 429 data transmission and control/display unit (2), and the working frequency is transmitted to the signal processing unit (3); the signal processing unit (3) modulates the selected working frequency of the ultrashort radio station through employing the analog voice signal, and forming a carrier radio frequency signal with audio information; and the signal processing unit (3) enables the carrier radio frequency signal with audio information to be transmitted to a comprehensive tester for interpretation through a coaxial load.
Owner:HARBIN

Half-H bridge power inverter system

The invention belongs to a brushless DC (Direct Current) motor driver power inverter system, and particularly discloses a half-H bridge power inverter system, which comprises multiple bridge arm circuits connected in parallel. Each bridge arm circuit is composed of multiple power circuits connected in parallel; each power circuit is composed of a field effect tube, a switching speed control circuit and a grid control clamping circuit; a control signal output end of a motor driver is communicated with an input end of each switching speed control circuit; the output end of each switching speed control circuit is respectively communicated with an input end of one corresponding grid control clamping circuit and a grid of one corresponding field effect tube; the drain electrodes D of the field effect tubes in the same bridge arm circuit are communicated; the source electrodes S of the field effect tubes in the same bridge arm circuit are communicated; the drain electrodes D and the source electrodes S of the field effect tubes in two adjacent bridge arm circuits are communicated. The half-H bridge power inverter system is high in power, small in volume, high in reliability and good in electromagnetic compatibility, and can realize precise control and continuous as well as reliable operation of the brushless DC motor.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1

Rate gyro tester

The invention relates to a rate gyro tester, which comprises a single-pole single-throw switch (S1), a single-pole double-throw switch (S2), a single-pole double-throw switch (S3), a fuse (F1), an ammeter (A1), a positive testing hole (FLAG+), a negative testing hole (FLAG-), a positive output testing hole (OUTPUT+), a negative output testing hole (OUTPUT-), a first resistor (R1), a second resistor (R2), a third resistor (R3) and a fourth resistor (R4), wherein the first single-pole single-throw switch (S1) controls a power supply and is connected to the fuse (F1) and the ammeter (A1) in series, the middle position of the second single-pole double-throw switch (S2) is connected to the positive testing hole (FLAG+), the double throw terminals of the second single-pole double-throw switch (S2) are respectively corresponding to the first resistor (R1) and the second resistor (R2), the first resistor (R1) and the second resistor (R2) are connected to the negative testing hole (FLAG-), the middle position of the third single-pole double-throw switch (S3) is connected to the positive output testing hole (OUTPUT+), the double throw terminals of the third single-pole double-throw switch (S3) are respectively corresponding to the third resistor (R3) and the fourth resistor (R4), and the third resistor (R3) and the fourth resistor (R4) are connected to the negative output testing hole (OUTPUT-).
Owner:HARBIN
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