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A simple device measuring 0.05 DC impedance method


Equipment and components, determine channel read channel database: Table 1, DA4, line number is 101; and then read the state from the parameter library data, Table 2, the first record of a 101 field A1 = U means that the output voltage as DA4 op amp input, B1: 145,[link widoczny dla zalogowanych], said analog output voltage parameter value 145V, representatives from the Dlo, this time, the op amp circuit output 145V, equivalent to a distance Dl0 simulated radar range signal and automatically entered into the detection system , control and measurement system to complete the project work automatically detected; When the third when A1 = XIO1 records,[link widoczny dla zalogowanych], X that can continuously adjust the output is, B1 = 185 starting from the initial value of 185V continuously adjustable,[link widoczny dla zalogowanych], B2 = 95 that is terminated is 95V, can simulate the change from D2 ~ D2o distance. As detection system uses a hierarchical database to store various data and information from the radar signal parameters of the channel using analog circuits, the input D / A volume ratio coefficient and the output values and other data stored in the database, the main program by calling the level of Database on the moves to explain the operation of the hardware, the control parameters of the hardware circuit simulation and testing to complete the work, step by step process of calling the database is to control the level of hardware implementation of the operation. So the program itself and the hardware circuit is \In this way, to achieve the separation of software and hardware to make programming simple, to maximize the versatility of the software. Control parameters in this way analog circuits, making the expansion of analog signals from other types of radar is very convenient. For simulation of the other radar, the distance between D and UD-voltage relationship of (2), the parameters of analog hardware circuits, procedures and database structures are not to make any changes, just change the parameter library data,[link widoczny dla zalogowanych], control operation put out to meet (2) can be. Shows that the control parameters using this method of radar simulation circuit parameters from the analog signal has good versatility. 4. Conclusion virtual instrument based analog circuit parameters of radar signal parameters from the simulation method, simply design a high-voltage op amp circuit can simulate a variety of radar range voltage signal, from hardware to solve a common problem. Because the op amp's output is controlled by the program calls the database, so the distance to simulate other types of radar signals, just modify the data in the database can be achieved, the general parameters of the simulation is greatly enhanced. This method has been applied to a sight automated detection systems, the successful implementation of a variety of models from the radar signal simulation. Experimental results show that it has a simple structure, high output accuracy, linearity, high reliability, and versatility well. Air sight of its application for achieving automated detection is of great significance. References [1】 Liuchang Li, Zhigang. Air shooting fire control system. Xi'an: Air Force Engineering Institute, 1994 [2】 APEXMICROTECHNOLOGYV8.5PRODUCTSHANDBOOK, APEXMI-CRO'I ~ CHNOLOGYCORPORATION, 2000 [3】 Yang, Shi Zhong Xun, check light East. Detection of a certain type of database design air fire sight. Computer Ding Cheng, 1999 ■ (on the next page 34) calculated the same as above, that of a plate used QJ36R ~ a point to the corresponding generation of more positive. The difference is that: when Rl with 10Q, R2 with 10Q; or Rl with 10Q, R2 with the 10Q. In short, R1 and R2, the ratio is 10, use the R1, R2 of a value. Corresponding to whichever is more positive. Of course, the resistance seized × 10Q disk, you can also use the \Was seized resistor × 10Q plate and the following measurement and testing technology 2002 ・ No. 4 of the disk, compared with 0.002 the bridge can be measured directly, this article is no longer introduced. 4. Conclusion 0336 general measure departments have this equipment, is a commonly used standard instruments. Test environment as long as conditions are met JJG166-1993 (DC Resistors> verification procedures; the stability of the instrument, allowing to meet the basic error JJG125-86 verification regulations to carry out this type of resistor can be measured. Of course, for the DC resistance above the 10Q resistors,[link widoczny dla zalogowanych], can not be used to measure the measurement method, but once above the resistance level of accuracy of its generally 10Q 0.1 level and below, this time with a high resistance bridge can be directly , high impedance meter and other instruments to measure. In summary, the paper describes the method for the medium and high resistance measurement is undoubtedly a simple, economical and suitable method. ■ Mission

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