CN103543757A - Flow control system - Google Patents
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- CN103543757A CN103543757A CN201310276607.8A CN201310276607A CN103543757A CN 103543757 A CN103543757 A CN 103543757A CN 201310276607 A CN201310276607 A CN 201310276607A CN 103543757 A CN103543757 A CN 103543757A
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Abstract
The invention discloses a flow control system, which comprises a pulse signal generator, an actuator and a magnetic valve, a controller and a flow sensor; the pulse generator and the actuator are connected, and the actuator and the magnetic valve are connected; the controller and the pulse signal generator are connected, and the flow sensor is respectively connected with the controller and the pulse signal generator, and the controller is set with a standard flow valve, and the flow sensor feeds back the extracted current flow valve of the controlled object to the controller and the pulse signal generator; the controller compares the standard flow valve and the current flow valve, and generates a control signal and sends to the pulse signal generator, and the pulse signal generator generates a control signal for controlling the driver according to the control signal and the current flow valve; the invention has the advantages that an inner closed loop is constructed for realizing full scale level change and parameter change compensation of the whole flow control system, and high-precision driving sources are not needed, thereby realizing high-precision control of the controlled object flow.
Description
Technical field
The present invention relates to a kind of flow control technique, especially relate to a kind of flow control system.
Background technology
Existing pulsed flow control system generally comprises pulse signal generator, driver and solenoid valve, the output terminal of pulse signal generator is connected with the input end of driver, the output terminal of driver is connected with the input end of solenoid valve, and the output terminal of solenoid valve is connected with control object.Its principle of work is: the input end access target flow value of pulse signal generator, pulse signal generator obtains pulse control signal according to target flow value and flows to driver, driver drives electromagnetic valve work.In theory, for a system of having debugged, now the flow of control object should be identical with the target flow value in pulse signal generator.But flow control system normally designs for the control object of nominal, in this nominal control object, hypothesis has permanent parameter.In pulsed flow control system, to the control of flow, be that namely the ON time of pulse control signal and the ratio in cycle are realized by adjusting the dutycycle of pulse control signal.Under the full scale level of control object (in during ON time by the flow of solenoid valve), the size of dutycycle has determined the height of flow.Under normal conditions, the pulse control signal that pulse signal generator offers solenoid valve can generate exactly.Yet the variation of the variation of full scale level and control object parameter, is all the disturbance to whole flow control system.If disturbance is much slower that variations and control object are very little than the dynamics of control object, so generally flow control system can be corrected the error being caused by this variation, and effectively reduces its impact.Yet, if this alters a great deal, will in flow control system, produce a significant disturbance so, and if this variation is very fast, even if it is very little, also can become the noise of flow control system.Although for disturbance, the robustness that increases flow control system can improve its stability, or the bandwidth that narrows flow control system also can allow it insensitive to system noise, yet all these methods all can cause the deterioration of the control performance of flow control system.In the flow control system of accurately controlling at needs, need to the variation of control object be controlled among a small circle in.Yet, in order to make variation less, except reducing control object to the susceptibility of influence factor, also need high-accuracy drive source (driver and solenoid valve), high-accuracy drive source and the insensitive robust control object of influence factor has been increased to system cost, and sometimes there is the high-precision drive source meeting the demands.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of high-accuracy drive source that do not need to adopt, and can realize the flow control system that the high precision of control object flow is controlled.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of flow control system, comprise pulse signal generator, driver and solenoid valve, described pulse producer is connected with described driver, described driver is connected with described solenoid valve, also comprise controller and for extracting the flow sensor of the present flow rate value of control object, described controller is connected with described pulse signal generator, described flow sensor is connected with described pulse signal generator with described controller respectively, in described controller, be set with normal stream value, described flow sensor feeds back to described controller and described pulse signal generator by the present flow rate value of the control object of extracting, after described controller standard of comparison flow value and present flow rate value, produce control signal and flow to pulse signal generator, pulse signal generator is controlled driver according to control signal and present flow rate value generation control signal.
Described pulse signal generator is provided with pwm control signal output terminal, and the pwm control signal output terminal of described pulse signal generator is connected with described driver.
Described pulse signal generator is comprised of pulse control module and pulse signal generation module, described pulse signal generation module comprises period register, period counter, ON time register, ON time counter, load steering logic module and signal controlling logic module, the signal output part of described pulse control module is connected with the signal input part of the signal input part of described period register and described ON time register respectively, the signal output part of described period register is connected with the signal input part of the signal input part of described period counter and described signal controlling logic module respectively, the signal output part of described ON time register is connected with the signal input part of the signal input part of described ON time counter and described signal controlling logic module respectively, the signal output part of described period counter is connected with described signal controlling logic module with described load steering logic module respectively, the signal output part of described ON time counter is connected with described signal controlling logic module.
Described pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, the signal input part of described value of feedback computing module is connected with the signal output part of described flow sensor, the signal input part of described first order dutycycle decision module, the signal input part of the signal input part of described first order cycle decision module and described second level cycle decision module is connected with the signal output part of described controller respectively, the signal output part of the signal output part of described first order dutycycle decision module and described first order cycle decision module is connected with the signal input part of described desired value computing module respectively, the signal output part of the signal output part of described desired value computing module and described value of feedback computing module is connected with the signal input part of described comparer respectively, the signal output part of described comparer is connected with the signal input part of described second level ON time computing module.
Described pulse signal generator is provided with PDM control signal output terminal, and the PDM control signal output terminal of described pulse signal generator is connected with described driver.
Described pulse signal generator is comprised of pulse control module and pulse signal generation module, described pulse signal generation module comprises period register, period counter, ON time register, ON time counter, the length of one's sleep register, the length of one's sleep counter, clock control logic module, load steering logic module and signal controlling logic module, the signal output part of described pulse control module respectively with the signal input part of described period register, the signal input part of described ON time register is connected with the signal input part of described length of one's sleep of register, the signal output part of described period register is connected with the signal input part of the signal input part of described period counter and described signal controlling logic module respectively, the signal output part of described ON time register is connected with the signal input part of described ON time counter and described signal controlling logic module respectively, described length of one's sleep register signal output part with described length of one's sleep counter signal input part be connected, the signal output part of described period counter is connected with described signal controlling logic module with described load steering logic module respectively, the signal output part of described ON time counter is connected with described signal controlling logic module, described length of one's sleep, the signal output part of counter was connected with described clock control logic module.
Described pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, the described signal input part of value of feedback computing module and the signal output part of described flow sensor are connected, the signal input part of described first order dutycycle decision module, the signal input part of the signal input part of described first order cycle decision module and described second level cycle decision module is connected with the signal output part of described controller respectively, the signal output part of the signal output part of described first order dutycycle decision module and described first order cycle decision module is connected with the signal input part of described desired value computing module respectively, the signal output part of the signal output part of described desired value computing module and described value of feedback computing module is connected with the signal input part of described comparer respectively, the signal output part of described comparer is connected with the signal input part of described second level ON time computing module.
Described controller is PID controller, and described driver is ON-OFF control circuit.
Compared with prior art, the invention has the advantages that by being set with normal stream value in controller, flow sensor feeds back to controller and pulse signal generator by the present flow rate value of the control object of extracting, after controller standard of comparison flow value and present flow rate value, produce control signal and flow to pulse signal generator, pulse signal generator produces control signal driving driver according to control signal and present flow rate value, build thus an interior closed loop and realized the compensation to full scale level in whole flow control system changes and parameter changes, in this under effect of closed loop, even if do not adopt high-accuracy drive source, also can realize the high precision of control object flow is controlled, simultaneously, the introducing of interior closed loop greatly reduces the impact of perturbation on system, improved the robustness of system,
In the present invention, when pulse signal generator is provided with pwm control signal output terminal, the pwm control signal output terminal of pulse signal generator is connected with driver, pulse signal generator is comprised of pulse control module and pulse signal generation module, and pulse signal generation module comprises period register, period counter, ON time register, ON time counter, load steering logic module and signal controlling logic module, wherein the output terminal of signal controlling logic module is pwm control signal output terminal, signal controlling logic module is according to the output signal of period counter, the output signal of period register, the output signal of the output signal of ON time register and ON time counter produces pwm control signal,
In the present invention, when pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, when signal generates, first in by value of feedback computing module, calculate the currency of controlled object, simultaneously by first order dutycycle decision module, the desired value of first order cycle decision module and the controlled object of desired value computing module, on this basis, comparer contrasts the currency of control object and desired value, then comparative result is used for calculating ON time signal by second level ON time computing module, second level cycle decision module in pulse control module draws periodic signal according to the control signal of controller, and being used for producing pwm control signal by control wave generation module together with ON time signal, exports this periodic signal, thereby realize, the PWM of control object is controlled,
In the present invention, when pulse signal generator is provided with PDM control signal output terminal, the PDM control signal output terminal of pulse signal generator is connected with driver, pulse signal generator is comprised of pulse control module and pulse signal generation module, and pulse signal generation module comprises period register, period counter, ON time register, ON time counter, the length of one's sleep register, the length of one's sleep counter, clock control logic module, load steering logic module and signal controlling logic module, in pulse signal generation module, period counter and ON time counter are synchronous by clock control signal, when being counted as of period counter is zero, in load steering logic module, an asserts signal is accompanied by clock signal and produces, and start a new cycle at the negative edge of this asserts signal, the output terminal of signal controlling logic module is PDM control signal output terminal, signal controlling logic module adopts the output signal of period counter, the output signal of period register, the output signal of ON time register, the output signal of ON time counter, asserts signal and clock signal produce PDM signal,
In the present invention, when pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, when signal generates, first at the currency of the controlled object of value of feedback computing module, simultaneously by first order dutycycle decision module, the desired value of first order cycle decision module and the controlled object of desired value computing module, on this basis, comparer contrasts the currency of control object and desired value, then by second level ON time computing module, draw ON time signal, second level cycle decision module in pulse control module draws periodic signal according to the control signal of having controlled, and being used for producing PDM control signal by control wave generation module together with ON time signal, exports this periodic signal, thereby realize, the PDM of control object is controlled.
Accompanying drawing explanation
Fig. 1 is the theory diagram of embodiment mono-;
Fig. 2 is embodiment mono-or two structural representation;
Fig. 3 is the theory diagram of the pulse signal generator of embodiment mono-;
Fig. 4 is the theory diagram of the pulse signal generation module of embodiment mono-;
Fig. 5 is the signal sequence process flow diagram of the pulse signal generation module of embodiment mono-;
Fig. 6 is the theory diagram of the pulse control module of embodiment mono-;
Fig. 7 is the theory diagram of the present embodiment two;
Fig. 8 is the theory diagram of the pulse signal generator of embodiment;
Fig. 9 is the theory diagram of the pulse signal generation module of embodiment;
Figure 10 is the theory diagram of the pulse control module of embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment mono-: as shown in Figure 1, a kind of flow control system, comprise controller 1, pulse signal generator 2, driver 3, solenoid valve 4 and for extracting the flow sensor 5 of the present flow rate value of control object, controller 1 is PID controller, driver 3 is ON-OFF control circuit, controller 1 is connected with pulse signal generator 2, driver 3 is connected with solenoid valve 4, pulse signal generator 2 is provided with pwm control signal output terminal, this pwm control signal output terminal is connected with driver 3, flow sensor 5 is connected with pulse signal generator 2 with controller 1 respectively, in controller 1, be set with normal stream value, flow sensor 5 feeds back to controller 1 and pulse signal generator 2 by the present flow rate value of the control object of extracting, after controller 1 standard of comparison flow value and present flow rate value, produce control signal and flow to pulse signal generator 2, pulse signal generator 2 produces pwm control signal driving driver 3 according to control signal and present flow rate value.
As shown in Figure 2, in the present embodiment, control object, for being total to rail 6, is provided with thrower 7 on rail 6 altogether, and solenoid valve 4 is arranged on thrower 7, working fluid is pumped in common rail 6, thereby create a high pressure, when solenoid valve 4 powers up, working fluid flows out rail 6 altogether under common rail 6 inner high voltage effects, when solenoid valve 3 power-off are closed, the pwm control signal that the flow of working fluid can be produced by pulse signal generator 2 is adjusted the average service time of solenoid valve 3 and is controlled.
In the present embodiment, pulse signal generator 2 is comprised of pulse control module 22 and pulse signal generation module 21, as shown in Figure 3.As shown in Figure 4, pulse signal generation module 21 comprises period register 211, period counter 212, ON time register 213, ON time counter 214, load steering logic module 215 and signal controlling logic module 216, the signal output part of pulse control module 22 is connected with the signal input part of ON time register 213 with the signal input part of period register 211 respectively, the signal output part of period register 211 is connected with the signal input part of signal controlling logic module 216 with the signal input part of period counter 212 respectively, the signal output part of ON time register 213 is connected with the signal input part of signal controlling logic module 216 with the signal input part of ON time counter 214 respectively, the signal output part of period counter 212 is connected with signal controlling logic module 216 with load steering logic module 215 respectively, the signal output part of ON time counter 214 is connected with signal controlling logic module 216.
In the present embodiment, period counter 212, ON time counter 214, load steering logic module 215 and signal controlling logic module 216 are provided with set end and clock signal input terminal, period counter 212, ON time counter 214, the set end of load steering logic module 215 and signal controlling logic module 216 is connected and accesses asserts signal LD, ON time counter 214, the clock signal input terminal of load steering logic module 215 and signal controlling logic module 216 is connected and incoming clock signal CLK, the output signal of period counter 212 is designated as DA, the output signal of period register 211 is designated as DB, the output signal of ON time register 213 is designated as DC, the output signal of ON time counter 214 is designated as DD.
As shown in Figure 5, in pulse signal generation module 21, the cycle of a pwm signal is set in period register 211, the ON time of a pwm signal is set in ON time register 213, negative edge at LD signal, periodic quantity in period register 211 is further loaded in period counter 212, and the ON time value in ON time register 213 is further loaded in ON time counter 214.Period counter 212 and ON time counter 214 are counters of countdown, and both are synchronous by clock signal clk.When period counter 212 be counted as zero time, in load steering logic module 215, an asserts signal LD(pulse signal) be accompanied by clock signal clk and produce, and start a new cycle at the negative edge of this asserts signal LD.Signal controlling logic module 216 adopts the output signal DA of period counter 212, the output signal DC of the output signal DB of period register 211, ON time register 213, output signal DD, asserts signal LD and the clock signal clk of ON time counter 214 produce pwm signal.In signal controlling logic module 216, if DC is equal to or greater than DB, the setting value that is ON time register is the setting value that is equal to or greater than period register, and the negative edge at asserts signal LD will produce the pwm signal of a high level signal or 100% dutycycle so; And when DC is set to 0, in the decline of asserts signal LD, produce along producing a low level signal the i.e. pwm signal of 0% dutycycle; If DC be 0 and DB between, so at the rising edge of this asserts signal LD, the output of pwm signal be one " with " output of logic, should " with " logic has two pulses input, and these two pulses are inputted respectively in the output valve of period counter 212 and ON time counter 214, DA and DB are greater than generation in 0 o'clock at DC.The signal timing diagram of pulse signal generation module 21 as shown in Figure 4.In Fig. 4, illustrated when DC value be 0 and DB between time signal.At a moment t
1, at a negative edge of LD signal, the value of cycle and ON time is loaded into respectively to period counter 212 and ON time counter 214.After the half period of clock signal clk, in signal controlling logic module 216, the rising edge of clock signal clk is at a moment t
2trigger a pwm pulse, this pulse is at a moment t
3next rising edge by clock signal finishes.Current PWM finishes before before triggering another pwm pulse, and its dutycycle is from moment t
2to moment t
3time with from moment t
2to moment t
4cycle between ratio.
As shown in Figure 6, in the present embodiment, pulse control module 22 comprises value of feedback computing module 221, first order dutycycle decision module 222, first order cycle decision module 223, desired value computing module 224, comparer 225, second level cycle decision module 226 and second level ON time computing module 227, the signal input part of value of feedback computing module 221 is connected with the signal output part of flow sensor 5, the signal input part of first order dutycycle decision module 222, the signal input part of the signal input part of first order cycle decision module 223 and second level cycle decision module 226 is connected with the signal output part of controller 1 respectively, the signal output part of the signal output part of first order dutycycle decision module 222 and first order cycle decision module 223 is connected with the signal input part of desired value computing module 224 respectively, the signal output part of the signal output part of desired value computing module 224 and value of feedback computing module 221 is connected with the signal input part of comparer 225 respectively, the signal output part of comparer 225 is connected with the signal input part of second level ON time computing module 227.
Embodiment bis-: as shown in Figure 7, a kind of flow control system, comprise controller 1, pulse signal generator 2, driver 3, solenoid valve 4 and for extracting the flow sensor 5 of the present flow rate value of control object, controller 1 is PID controller, driver 3 is ON-OFF control circuit, controller 1 is connected with pulse signal generator 2, driver 3 is connected with solenoid valve 4, pulse signal generator 2 is provided with PDM control signal output terminal, the PDM control signal output terminal of pulse signal generator 2 is connected with driver 3, flow sensor 5 is connected with pulse signal generator 2 with controller 1 respectively, in controller 1, be set with normal stream value, flow sensor 5 feeds back to controller 1 and pulse signal generator 2 by the present flow rate value of the control object of extracting, after controller 1 standard of comparison flow value and present flow rate value, produce control signal and flow to pulse signal generator 2, pulse signal generator 2 produces PDM control signal driving driver 3 according to control signal and present flow rate value.
As shown in Figure 2, in the present embodiment, control object, for being total to rail 6, is provided with thrower 7 on rail 6 altogether, and solenoid valve 4 is arranged on thrower 7, working fluid is pumped in common rail 6, thereby create a high pressure, when solenoid valve 4 powers up, working fluid flows out rail 6 altogether under common rail 6 inner high voltage effects, when solenoid valve 3 power-off are closed, the pwm control signal that the flow of working fluid can be produced by pulse signal generator 2 is adjusted the average service time of solenoid valve 3 and is controlled.
In the present embodiment, pulse signal generator 2 is comprised of pulse control module 22 and pulse signal generation module 21, as shown in Figure 8.As shown in Figure 9, pulse signal generation module 21 comprises period register 211, period counter 212, ON time register 213, ON time counter 214, load steering logic module 215, signal controlling logic module 216, the length of one's sleep, register 217, the length of one's sleep counter 218 and clock control logic module 219, the signal output part of pulse control module 22 respectively with the signal input part of period register 211, the signal input part of ON time register 214 with the length of one's sleep register 217 signal input part be connected, the signal output part of period register 211 is connected with the signal input part of signal controlling logic module 216 with the signal input part of period counter 212 respectively, the signal output part of ON time register 213 is connected with the signal input part of signal controlling logic module 216 with the signal input part of ON time counter 214 respectively, the length of one's sleep register 217 signal output part with the length of one's sleep counter 218 signal input part be connected, the signal output part of period counter 212 is connected with signal controlling logic module 216 with load steering logic module 215 respectively, the signal output part of ON time counter 214 is connected with signal controlling logic module 216, the length of one's sleep, counter 218 signal output part was connected with clock control logic module 219.
In the present embodiment, period counter 212, ON time counter 214, load steering logic module 215, signal controlling logic module 216 and the length of one's sleep counter 218 be provided with set end, clock control logic module 219 is respectively arranged with clock signal input terminal and clock control signal output terminal, period counter 212 and ON time counter 214 are provided with clock control signal input end, load steering logic module 215 and signal controlling logic module 216 are provided with clock signal input terminal, period counter 212, ON time counter 214, load steering logic module 215, signal controlling logic module 216 with the length of one's sleep counter 218 set end be connected and access asserts signal LD, load steering logic module 215, the clock signal input terminal of signal controlling logic module 216 and clock control logic module 219 is connected and incoming clock signal CLK, the clock control signal output terminal of clock control logic module 219 is connected with the clock control signal input end of period counter 212 and ON time counter 214 respectively, the clock control signal output terminal output clock control signal CLKctrl of clock control logic module 219, the output signal of period counter 212 is designated as DA, the output signal of period register 211 is designated as DB, the output signal of ON time register 213 is designated as DC, the output signal of ON time counter 214 is designated as DD.
In the present embodiment, period counter 212, the length of one's sleep, counter 218 and ON time counter 214 were down counter, and the length of one's sleep, counter 218 minimum was clamped at 0.In pulse signal generation module 21, the cycle of a PDM signal is set in period register 211, the ON time of a PDM signal is set in ON time register 213, when controlling the length of one's sleep, first be kept at the length of one's sleep in a PDM cycle in register 217 length of one's sleep, then at the negative edge of asserts signal LD, the value of the length of one's sleep is loaded in counter 218 length of one's sleep and successively decreases along with clock signal clk, when the length of one's sleep, counter 218 count value reached 0, clock control logic module 219 produces clock control signal CLKctrl and enables period counter 212 and ON time counter 214, start a PDM cycle.At the negative edge of asserts signal LD, the periodic quantity in period register 211 is further loaded in period counter 212, and the ON time value in ON time register 213 is further loaded in ON time counter 214.Period counter 212 and ON time counter 214 are synchronous by clock control signal CLKctrl.When period counter 212 be counted as zero time, in load steering logic module 215, an asserts signal LD(pulse signal) be accompanied by clock signal clk and produce, and start a new cycle at the negative edge of this asserts signal LD.Signal controlling logic module 216 adopts the output signal DA of period counter 212, the output signal DC of the output signal DB of period register 211, ON time register 213, output signal DD, the asserts signal LD of ON time counter 214 and clock signal clk produce PDM signal.
As shown in figure 10, in the present embodiment, pulse control module 22 comprises value of feedback computing module 221, first order dutycycle decision module 222, first order cycle decision module 223, desired value computing module 224, comparer 225, second level cycle decision module 226 and second level ON time computing module 227, the signal input part of value of feedback computing module 221 is connected with the signal output part of flow sensor 5, the signal input part of first order dutycycle decision module 222, the signal input part of the signal input part of first order cycle decision module 223 and second level cycle decision module 226 is connected with the signal output part of controller 1 respectively, the signal output part of the signal output part of first order dutycycle decision module 222 and first order cycle decision module 223 is connected with the signal input part of desired value computing module 224 respectively, the signal output part of the signal output part of desired value computing module 224 and value of feedback computing module 221 is connected with the signal input part of comparer 225 respectively, the signal output part of comparer 225 is connected with the signal input part of second level ON time computing module 227.
Claims (8)
1. a flow control system, comprise pulse signal generator, driver and solenoid valve, described pulse producer is connected with described driver, described driver is connected with described solenoid valve, characterized by further comprising controller and for extracting the flow sensor of the present flow rate value of control object, described controller is connected with described pulse signal generator, described flow sensor is connected with described pulse signal generator with described controller respectively, in described controller, be set with normal stream value, described flow sensor feeds back to described controller and described pulse signal generator by the present flow rate value of the control object of extracting, after described controller standard of comparison flow value and present flow rate value, produce control signal and flow to pulse signal generator, pulse signal generator produces control signal control driver according to control signal and present flow rate value.
2. a kind of flow control system according to claim 1, is characterized in that described pulse signal generator is provided with pwm control signal output terminal, and the pwm control signal output terminal of described pulse signal generator is connected with described driver.
3. a kind of flow control system according to claim 2, it is characterized in that described pulse signal generator is comprised of pulse control module and pulse signal generation module, described pulse signal generation module comprises period register, period counter, ON time register, ON time counter, load steering logic module and signal controlling logic module, the signal output part of described pulse control module is connected with the signal input part of the signal input part of described period register and described ON time register respectively, the signal output part of described period register is connected with the signal input part of the signal input part of described period counter and described signal controlling logic module respectively, the signal output part of described ON time register is connected with the signal input part of the signal input part of described ON time counter and described signal controlling logic module respectively, the signal output part of described period counter is connected with described signal controlling logic module with described load steering logic module respectively, the signal output part of described ON time counter is connected with described signal controlling logic module.
4. a kind of flow control system according to claim 3, it is characterized in that described pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, the signal input part of described value of feedback computing module is connected with the signal output part of described flow sensor, the signal input part of described first order dutycycle decision module, the signal input part of the signal input part of described first order cycle decision module and described second level cycle decision module is connected with the signal output part of described controller respectively, the signal output part of the signal output part of described first order dutycycle decision module and described first order cycle decision module is connected with the signal input part of described desired value computing module respectively, the signal output part of the signal output part of described desired value computing module and described value of feedback computing module is connected with the signal input part of described comparer respectively, the signal output part of described comparer is connected with the signal input part of described second level ON time computing module.
5. a kind of flow control system according to claim 1, is characterized in that described pulse signal generator is provided with PDM control signal output terminal, and the PDM control signal output terminal of described pulse signal generator is connected with described driver.
6. a kind of flow control system according to claim 5, it is characterized in that described pulse signal generator is comprised of pulse control module and pulse signal generation module, described pulse signal generation module comprises period register, period counter, ON time register, ON time counter, the length of one's sleep register, the length of one's sleep counter, clock control logic module, load steering logic module and signal controlling logic module, the signal output part of described pulse control module respectively with the signal input part of described period register, the signal input part of described ON time register is connected with the signal input part of described length of one's sleep of register, the signal output part of described period register is connected with the signal input part of the signal input part of described period counter and described signal controlling logic module respectively, the signal output part of described ON time register is connected with the signal input part of described ON time counter and described signal controlling logic module respectively, described length of one's sleep register signal output part with described length of one's sleep counter signal input part be connected, the signal output part of described period counter is connected with described signal controlling logic module with described load steering logic module respectively, the signal output part of described ON time counter is connected with described signal controlling logic module, described length of one's sleep, the signal output part of counter was connected with described clock control logic module.
7. a kind of flow control system according to claim 6, it is characterized in that described pulse control module comprises value of feedback computing module, first order dutycycle decision module, first order cycle decision module, desired value computing module, comparer, second level cycle decision module and second level ON time computing module, the described signal input part of value of feedback computing module and the signal output part of described flow sensor are connected, the signal input part of described first order dutycycle decision module, the signal input part of the signal input part of described first order cycle decision module and described second level cycle decision module is connected with the signal output part of described controller respectively, the signal output part of the signal output part of described first order dutycycle decision module and described first order cycle decision module is connected with the signal input part of described desired value computing module respectively, the signal output part of the signal output part of described desired value computing module and described value of feedback computing module is connected with the signal input part of described comparer respectively, the signal output part of described comparer is connected with the signal input part of described second level ON time computing module.
8. a kind of flow control system according to claim 1, is characterized in that described controller is PID controller, and described driver is ON-OFF control circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/566,994 | 2012-08-03 | ||
| US13/566,994 US8754720B2 (en) | 2011-08-03 | 2012-08-03 | Two-stage pulse signal controller |
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| CN103543757A true CN103543757A (en) | 2014-01-29 |
| CN103543757B CN103543757B (en) | 2016-01-27 |
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| CN201320390163.6U Withdrawn - After Issue CN203502835U (en) | 2012-08-03 | 2013-07-01 | Flow control system |
| CN201310276607.8A Active CN103543757B (en) | 2012-08-03 | 2013-07-01 | A kind of flow control system |
| CN201320390125.0U Withdrawn - After Issue CN203502854U (en) | 2012-08-03 | 2013-07-01 | Temperature control system |
| CN201310274581.3A Active CN103558872B (en) | 2012-08-03 | 2013-07-01 | A kind of flow control system |
| CN201310276606.3A Active CN103543766B (en) | 2012-08-03 | 2013-07-01 | A kind of temperature control system |
| CN201320390906.XU Withdrawn - After Issue CN203502855U (en) | 2012-08-03 | 2013-07-01 | Temperature control system |
| CN201320390909.3U Withdrawn - After Issue CN203502836U (en) | 2012-08-03 | 2013-07-01 | Flow control system |
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| CN201320390163.6U Withdrawn - After Issue CN203502835U (en) | 2012-08-03 | 2013-07-01 | Flow control system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320390125.0U Withdrawn - After Issue CN203502854U (en) | 2012-08-03 | 2013-07-01 | Temperature control system |
| CN201310274581.3A Active CN103558872B (en) | 2012-08-03 | 2013-07-01 | A kind of flow control system |
| CN201310276606.3A Active CN103543766B (en) | 2012-08-03 | 2013-07-01 | A kind of temperature control system |
| CN201320390906.XU Withdrawn - After Issue CN203502855U (en) | 2012-08-03 | 2013-07-01 | Temperature control system |
| CN201320390909.3U Withdrawn - After Issue CN203502836U (en) | 2012-08-03 | 2013-07-01 | Flow control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774463A (en) * | 2016-11-28 | 2017-05-31 | 中科天融(北京)科技有限公司 | A kind of high-precision gas flow control system and method |
| CN107074067A (en) * | 2014-09-23 | 2017-08-18 | 法雷奥热系统公司 | Method for the device and control of the fluid of electrical heating the motor vehicles device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203502835U (en) * | 2012-08-03 | 2014-03-26 | 宁波保税区楷世环保科技有限公司 | Flow control system |
| CN104142695A (en) * | 2014-07-02 | 2014-11-12 | 苏州宏瑞净化科技有限公司 | Converging type air flow control device |
| TWI630846B (en) * | 2014-08-21 | 2018-07-21 | 三緯國際立體列印科技股份有限公司 | Heating control apparatus and control method thereof |
| CN104924470B (en) * | 2015-06-05 | 2017-04-05 | 江苏塞维斯数控科技有限公司 | A kind of multi-line cutting machine mortar nozzle |
| CN105676690B (en) * | 2016-01-11 | 2018-06-19 | 浙江大学 | A kind of solenoid valve intelligence control system and its method based on voltage PWM |
| CN105910882A (en) * | 2016-05-24 | 2016-08-31 | 苏州品诺维新医疗科技有限公司 | Heating device and blood coagulation analysis system |
| CN105842306B (en) * | 2016-05-20 | 2018-07-17 | 南京信息工程大学 | A kind of water content measuring device and measuring method |
| CN109541937A (en) * | 2018-12-14 | 2019-03-29 | 汕头市东方科技有限公司 | A kind of pulse-control system and control method of relay |
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- 2013-07-01 CN CN201310276607.8A patent/CN103543757B/en active Active
- 2013-07-01 CN CN201320390125.0U patent/CN203502854U/en not_active Withdrawn - After Issue
- 2013-07-01 CN CN201310274581.3A patent/CN103558872B/en active Active
- 2013-07-01 CN CN201310276606.3A patent/CN103543766B/en active Active
- 2013-07-01 CN CN201320390906.XU patent/CN203502855U/en not_active Withdrawn - After Issue
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| CN107074067A (en) * | 2014-09-23 | 2017-08-18 | 法雷奥热系统公司 | Method for the device and control of the fluid of electrical heating the motor vehicles device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103558872B (en) | 2016-01-27 |
| CN103543757B (en) | 2016-01-27 |
| CN103543766A (en) | 2014-01-29 |
| CN103558872A (en) | 2014-02-05 |
| CN203502855U (en) | 2014-03-26 |
| CN203502854U (en) | 2014-03-26 |
| CN103543766B (en) | 2015-11-04 |
| CN203502835U (en) | 2014-03-26 |
| CN203502836U (en) | 2014-03-26 |
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