Portable numerical control resistance signal source and signal generating method
A resistance signal source, portable technology, applied in the direction of measurement of electrical variables, improvement of basic electrical components, components of electrical measuring instruments, etc., can solve problems such as inability to integrate, mismatch of excitation circuits, mismatch of source and two ports, etc., to achieve Wide application range, small on-resistance, and convenient operation
Active Publication Date: 2022-03-15
NAVAL UNIV OF ENG PLA
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Problems solved by technology
The traditional knob-type resistance box is bulky, only supports manual adjustment, cannot realize numerical control, and cannot be integrated into the field of automatic testing
The electronic synthesis resistor uses the active two-port network to simulate the ohmic characteristics of the resistor, which can realize the output of the variable resistor with high precision, but the active two-port network is not suitable for the use of AC excitation or intermittent excitation, or with the secondary instrument The excitation circuit does not match and other occasions
The way of switching the resistance network of the traditional relay can realize the resistance completely equivalent to the impedance of the sensor, which can solve the problem of the mismatch between the two active ports. Switching resistor networks cannot achieve high-precision resistance output
Method used
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[0010] The present invention is further detailed below with reference to the accompanying drawings and specific embodiments:
[0011] Such as figure 1 and 2 A portable CNC resistor signal source, which includes human machine intersection interface 1, MCU 2, relay driving unit 3, and relay resistance network 4, where the input unit 1.1 of the human machine interaction interface 1 is used to set the input of the resistance value. The output terminal of the input unit 1.1 is connected to the MCU2, and the input unit 1.1 is used to transmit the set resistance value to the MCU 2, and the MCU2 is used to calculate the set resistance value according to the relay switch array case solution algorithm. The drive sequence is transmitted to the relay drive unit 3, and the relay driving unit 3 is used to drive the relay resistance network 4 according to the relay group driving sequence, so that the resistance input circuit is turned on in the relay resistance network 4, and outputs the resista...
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The invention discloses a portable numerical control resistance signal source, the input unit of its man-machine interaction interface is used for setting the input of the resistance value, the output end of the input unit is connected to the MCU, and the input unit is used for transmitting the set resistance value to the MCU , the MCU is used to calculate the set resistance value according to the relay switch array solution algorithm to obtain the relay group driving sequence, and transmit the relay group driving sequence to the relay driving unit, and the relay driving unit is used to drive the relay resistor network according to the relay group driving sequence, Connect the connected resistor in the relay resistor network to the circuit, and output the resistor value externally. Compared with the traditional resistance source, the resistance signal source has the advantages of small size, high precision, wide application range and convenient operation.
Description
Technical field [0001] The present invention relates to the field of automated test systems and signal source technologies, and specifically refers to a portable digital-control resistance signal source and signal generation method. Background technique [0002] Resistance boxes are commonly used signal sources, high precision resistance signals are often used in calibration of multimeters and resistance sensors. At present, the resistance signal source has three types, traditional knob resistance box, electronic synthetic resistance, and traditional relay switching resistance network resistance signal source. Traditional knob resistance box is large, only support manual adjustment, cannot achieve CNC, and cannot be integrated into the automatic test field. Electronic synthesis resistance uses an active two-port network to simulate the ohmic characteristics of the resistor, which can realize the output of variable resistors, high precision, but some source II network is not suita...
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IPC IPC(8): G01R35/00G01R1/20
CPCG01R35/007G01R1/203
Inventor 陈盼辉金传喜朱利文刘明辉毛伟张龙飞
Owner NAVAL UNIV OF ENG PLA