FIELD: mechanical engineering; tower cranes.
SUBSTANCE: invention relates to checking and control of load-lifting devices, namely, to protection of signal processing circuit of analog resistive transducer in tower crane protection device. Signal Se is converted into digital signal n by analog-digital converter with resolution R. Digital signal nI is received and stored. Then values of supply voltages Va, Vb of transducer are inverted and new digital signal n2 is received. Both signals n1, n2 are summed up, and their sum S is compared with resolution R of converter. Control signal Cm corresponding to control command Sc is supplied to operating mechanism if sum S is equal to resolution R or is not supplied if sum S not equal to resolution R.
EFFECT: simplified design of protection of circuit, improved reliability and economy.
9 cl, 1 tbl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| RAMP-TYPE ANALOGUE-TO-DIGITAL CONVERTER | 2012 |
|
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| CONVERTER OF RATIO OF TWO VOLTAGES TO CODE | 0 |
|
SU1695501A1 |
| BIDIRECTIONAL NUMBER-PULSE ANALOGUE-TO-DIGITAL CONVERTER | 2009 |
|
RU2429563C1 |
