Patent RU-2205045-C1 (RU)
Title: Method and device for producing magnetotherapeutic treatment signals
Inventor: BORISOV A G
IPC: A61N2/02
Filed: 2001-11-23
Granted: 2003-05-27
Abstract: FIELD: medicine; medical engineering. SUBSTANCE: method involves supplying electric signal as binary impulse sequence to inductor within preset time intervals Δt i , where i=  is the current step number, m is the number of treatment steps within one time period T. Impulse succession frequency is equal to f i  = 1/t i , its duration is equal to τ i  = (p 0 +p 1 )•t i , where t i  - is the impulse succession period, p 0  - is the number of intervals having logical zero level. The sequence is converted into electric signal having electric current level of p 1  -, where   is the binary impulse sequence impulse voltage amplitude, R is the inductor winding resistance. The impulse sequence is repeated during each interval U i  Δt i  times. Beside that, two-leveled electric signal defining polarity is built. One of signal levels is associated with direct magnetic induction vector direction produced by field inductor and the other one with the reversed direction. Binary sequence creation in each time interval of Δt i /τ i  starts with supplying constant voltage of Δt i  during time U 0 , where   is the inductor time constant. Then, the proper binary impulse sequence supply begins with period τ c , where t i  = (p 0 +p 1 )•h t  is time discretization interval, h t  = 1/f 0  is the reference frequency. The binary impulse sequence is delivered to the inductor within τ i  = Δt i -τ si  time interval. Change of zero value to unit value and vice versa takes place at time moments being h t . multiples. The device has reference voltage bus connected to an inductor or inductor section via key, filter and magnetic induction vector switch unit connected in series. Data line is connected to information processing inputs of binary impulse sequence setter, magnetic induction vector polarity code memory unit and time interval durations code memory unit connected with its input to the device input and connected to time interval durations setter signal input which information processing inputs are connected to time interval durations code memory unit outputs. Time interval durations setter output is connected to address counter which outputs are connected to other information processing inputs of binary impulse sequence setter, time interval durations code memory unit and magnetic induction vector polarity code memory unit which output is connected to the other input of magnetic induction vector switch. The device also has anterior start signal front selection unit which input is connected to the device input and its output is connected to one input of the first OR-gate which other output is connected to time interval duration setter output via delay element. The first OR- gate output is connected to signal input of starting impulse setter. The other signal input is connected to reference voltage oscillator output, the information processing inputs being connected to starting impulse duration memory unit outputs. Direct output of the starting impulse setter is connected to one input of the second OR-gate and inverse output of the starting impulse setter is connected to signal input of the binary impulse sequence setter via AND-gate and clock pulse oscillator connected in series. The binary impulse sequence setter output is connected to the other input of the second OR-gate which output is connected to the other key input. The other input of the AND-gate is connected to device input. Information processing inputs of the starting impulse duration memory unit are connected to data line and to address counter outputs. EFFECT: wide range of functional features; enhanced effectiveness of treatment; increased inhomogeneity of magnetic field. 3 cl, 3 dwg