Background technology
Because electric capacity is subject to the restriction of production technology, has in actual applications certain tolerance.Aluminium foil is for forming the critical elements of electric capacity, and the aluminium foil withstand voltage properties has determined serviceability, the serviceable life of electric capacity as a basic parameter of electric capacity, and the withstand voltage that therefore detects aluminium foil is of crucial importance.
Existing measuring principle in the prior art, is positioned over aluminium foil 304 in the test trough 305 that test solution 306 is housed as shown in Figure 1, sets the current value 302 of current flowing table, and 301 pairs of aluminium foils 304 of direct supply apply DC voltage Vf.From energising beginning until the magnitude of voltage that voltage table 303 is measured rises to 90% used time of Vf, as Tr record pressure rising time, begin aluminium foil arrives after 180 seconds the voltage withstand voltage record as aluminium foil 304 from Tr.
When measuring the withstand voltage voltage of aluminium foil 304 in this scheme, for different tested aluminium foils, need the output voltage of artificial adjusting direct supply, set measuring current, need artificial record test voltage and test duration.Need to judge whether aluminium foil is qualified by the manual analysis test data.
The aluminium foil withstand voltage is measured direct supply, reometer and the voltage table that needs special use, apparatus expensive, and need manual debugging, uncontrollable Measuring Time, need the artificial judgment aluminium foil withstand voltage whether qualified, the tester is had relatively high expectations, can't realize automatic detection.
The utility model content
The technical matters that the utility model mainly solves provides a kind of aluminium foil pressure proof performance detection device and system, can realize aluminium foil withstand voltage automatic detection function.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of aluminium foil pressure proof performance detection device is provided, aluminium foil is positioned in the test trough that test solution is housed, this device comprises: the first serial communication module, and the first serial communication module obtains full test magnitude of voltage and constant measuring current value from the serial data passage; Controller, be connected with the first serial communication module, controller comprises the first pwm signal output port and the second pwm signal output port, controller is exported the first pwm signal according to the full test magnitude of voltage at the first pwm signal output port, exports the second pwm signal according to constant measuring current value at the second pwm signal output port; The inversion boosting module, the inversion boosting module comprises voltage output end, and voltage output end is connected with aluminium foil, and the inversion boosting module produces according to the first pwm signal has the DC voltage of full test magnitude of voltage, and is depressed into aluminium foil by the voltage output end output DC; The pull-up resistor adjustment module, respectively with test trough be connected the pwm signal output port and be connected, according to the second pwm signal regulating load resistance value in the pull-up resistor adjustment module, to produce the measuring current with constant measuring current value; Controller further comprises the first analog to digital conversion port and timer, the first analog to digital conversion port is connected with voltage output end, when the first analog to digital conversion port processing is the predetermined percentage of full test magnitude of voltage to the magnitude of voltage of voltage output end, start timer timing one predetermined amount of time, when predetermined amount of time finishes, again gather the magnitude of voltage of voltage output end and be sent to the serial data passage by the first serial communication module.
Wherein, this device further comprises switch module, and switch module is arranged between voltage output end and the aluminium foil, is connected with aluminium foil or disconnects with the control voltage output end.
Wherein, predetermined percentage is 90%, and predetermined amount of time is 180 seconds.
For solving the problems of the technologies described above, another technical scheme that the utility model adopts is: a kind of aluminium foil withstand voltage properties detection system is provided, aluminium foil is positioned in the test trough that test solution is housed, and this system comprises host computer and aluminium foil pressure proof performance detection device, and this host computer comprises: computing machine; The second serial communication module is connected with computing machine, and computing machine sends full test magnitude of voltage and constant measuring current value to the second serial communication module; The aluminium foil pressure proof performance detection device comprises: the first serial communication module, the first serial communication module is connected to set up the serial data passage with the second serial communication module, and the first serial communication module obtains full test magnitude of voltage and constant measuring current value from the serial data passage; Controller, be connected with the first serial communication module, controller comprises the first pwm signal output port and the second pwm signal output port, controller is exported the first pwm signal according to the full test magnitude of voltage at the first pwm signal output port, exports the second pwm signal according to constant measuring current value at the second pwm signal output port; The inversion boosting module, the inversion boosting module comprises voltage output end, and voltage output end is connected with aluminium foil, and the inversion boosting module produces according to the first pwm signal has the DC voltage of full test magnitude of voltage, and is depressed into aluminium foil by the voltage output end output DC; The pull-up resistor adjustment module, respectively with test trough be connected the pwm signal output port and be connected, according to the second pwm signal regulating load resistance value in the pull-up resistor adjustment module, to produce the measuring current with constant measuring current value; Controller further comprises the first analog to digital conversion port and timer, the first analog to digital conversion port is connected with voltage output end, when the first analog to digital conversion port processing is the predetermined percentage of full test magnitude of voltage to the magnitude of voltage of voltage output end, start timer timing one predetermined amount of time, when predetermined amount of time finishes, again gather the magnitude of voltage of voltage output end and by the first serial communication module magnitude of voltage is sent to the serial data passage; The second serial communication module obtains magnitude of voltage and exports computing machine to from the serial data passage.
Wherein, this paper tinsel pressure proof performance detection device further comprises switch module, and switch module is arranged between voltage output end and the aluminium foil, is connected with aluminium foil or disconnects with the control voltage output end.
Wherein, predetermined percentage is 90%, and predetermined amount of time is 180 seconds.
The beneficial effects of the utility model are: the situation that is different from prior art, aluminium foil pressure proof performance detection device of the present utility model and system are by arranging controller, inversion boosting module, pull-up resistor adjustment module and first serial communication module, so that controller obtains full test magnitude of voltage and constant measuring current value from the first serial communication module, and produce corresponding voltage and be applied to aluminium foil according to above-mentioned Numerical Control inversion boosting module, control load resistance adjustment module maintains corresponding current, thereby realizes the automatic detection of aluminium foil withstand voltage.
Embodiment
See also Fig. 2, Fig. 2 is the electrical block diagram of the utility model aluminium foil pressure proof performance detection device one preferred embodiment.As shown in Figure 2, aluminium foil 201 is positioned in the test trough 202 that test solution 203 is housed, and aluminium foil pressure proof performance detection device 10 of the present utility model comprises: first serial communication module 101, controller 102, inversion boosting module 103, load regulation module 104 and switch module 105.
Wherein, first serial communication module 101 obtains full test magnitude of voltage and constant measuring current value from the serial data passage.
Controller 102, be connected with first serial communication module 101, controller 102 comprises a PWM (Pulse Width Modulation, pulse-length modulation) signal output port 1021 and the second pwm signal output port 1022, controller 102 at the first pwm signal output port 1021 outputs the first pwm signal, is exported the second pwm signal according to constant measuring current value at the second pwm signal output port 1022 according to the full test magnitude of voltage.Wherein, this controller 102 particularly can be the micro controller such as MCU, DSP, ARM.
Inversion boosting module 103 comprises voltage output end 1031, voltage output end 1031 is connected with aluminium foil 201, inversion boosting module 103 produces according to the first pwm signal has the DC voltage of full test magnitude of voltage, and exports these DC voltage to aluminium foil 201 by voltage output end 1031.Inversion boosting module 103 can be managed by DAC and comparer, PWM and MOSFET, or the PWM wave producer is realized.
Pull-up resistor adjustment module 104, respectively with test trough 202 be connected pwm signal output port 1022 and be connected, according to the second pwm signal regulating load resistance value in pull-up resistor adjustment module 104, to produce the measuring current with constant measuring current value.Wherein, this pull-up resistor adjustment module 104 particularly can be DAC (D/A converter module) and comparer, PWM and MOSFET (field effect) pipe, or the PWM wave producer.
Controller 102 further comprises the first analog to digital conversion port one 023 and timer (not shown), the first analog to digital conversion port one 023 is connected with voltage output end 1031, when the magnitude of voltage that collects voltage output end 1031 at the first analog to digital conversion port one 023 is the predetermined percentage of full test magnitude of voltage, start timer timing one predetermined amount of time, when predetermined amount of time finishes, again gather the magnitude of voltage of voltage output end 1031 and be sent to the serial data passage by first serial communication module 101.Wherein, depend on actual needs, can set predetermined percentage is 90%, and predetermined amount of time is 180 seconds.
And, please further referring to Fig. 2, as shown in Figure 2, controller 102 further comprises the second analog to digital conversion port one 025, wherein, the second analog to digital conversion port one 025 is connected with test trough 202, be used for the current value between collecting test groove 202 and the pull-up resistor adjustment module 104104, controller 102 judges whether this current value is identical with constant measuring current value after utilizing the second analog to digital conversion port one 025 to obtain this current value, if, keep output the second pwm signal, if not, adjust the pulse width of the second pwm signal and frequency so that the current value that records is identical with constant measuring current value according to the electric current difference, thereby reach the effect of closed loop lock current.
Switch module 105 is arranged between voltage output end 1031 and the aluminium foil 201, is connected with aluminium foil 201 or disconnects with control voltage output end 1031.Wherein, switch module 105 can be the mechanical switch of Manual press, and in alternative of the present utility model, this switch module 105 can omit.
And in alternative of the present utility model, the aluminium foil pressure proof performance detection device can further comprise the modules such as storer, display screen, and these modules of setting up are this area common technology, do not give unnecessary details in this.
In the present embodiment, when predetermined amount of time finishes, again gather the magnitude of voltage of voltage output end 1031 and be sent to the serial data passage by first serial communication module 101, so that any and first serial communication module 101 are set up the channel attached serial equipment of serial data and all can be got access to this magnitude of voltage, as the printer serial ports being connected with this first serial communication module 101, directly print this magnitude of voltage, or will be connected with this first serial communication module 101 with the host computer of serial ports, utilize host computer to draw withstand voltage curve map, thereby realize automatic measurement.
Please further referring to Fig. 3, the electrical block diagram of the utility model aluminium foil withstand voltage properties detection system one preferred embodiment, as shown in Figure 3, in the present embodiment, further set up host computer 30 on the basis of a upper embodiment, form an aluminium foil withstand voltage properties detection system in order to using aluminium foil pressure proof performance detection device and the host computer 30 that an embodiment discloses.
As shown in Figure 3, aluminium foil withstand voltage properties detection system of the present utility model comprises host computer 30 and aluminium foil pressure proof performance detection device.
Wherein, this host computer 30 comprises computing machine 302 and second serial communication module 301, and second serial communication module 301 is connected with computing machine 302, and computing machine 302 sends full test magnitude of voltage and constant measuring current value to second serial communication module 301.
The first serial communication module 101 of aluminium foil pressure proof performance detection device is connected to set up the serial data passage with the second serial communication module 301 of host computer 30, and first serial communication module 101 obtains full test magnitude of voltage and constant measuring current value from the serial data passage.And second serial communication module 301 obtains the magnitude of voltage of the voltage output end 1031 that gathers when predetermined amount of time finishes and exports it to computing machine 302 from the serial data passage.
Computing machine 302 can be processed according to this magnitude of voltage, described point, and with formation characteristic curve and demonstration, under specific circumstances also printable output, thereby so that the worry that the tester has exempted manual collection data and drawn.And, for different aluminium foils, can utilize computing machine 302 to transfer in the first serial communication module 101 by second serial communication module 301 full test magnitude of voltage and constant measuring current value that the aluminium foil of different size is required, to realize automatic measurement.
Aluminium foil pressure proof performance detection device of the present utility model and system are by arranging controller 102, inversion boosting module 103, pull-up resistor adjustment module 104 and first serial communication module 101, so that controller 102 obtains full test magnitude of voltage and constant measuring current value from first serial communication module 101, and produce corresponding voltage and be applied to aluminium foil 201 according to above-mentioned Numerical Control inversion boosting module 103, control load resistance adjustment module 104 maintains corresponding current, thereby realizes the automatic detection of aluminium foil 201 withstand voltages.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.