CN2049366U - Multifunction tester for camera's flashlight - Google Patents

Abstract

The utility model discloses a multifunction tester for a flashlight of a camera for measuring the electric performance of the flashlight oscillation transformer of the camera and the trigger. By adopting a small capacitance block and a contrasting testing method, the multifunction tester for the flashlight of the camera controls the performance index and admits the error, and the testing time of each oscillation transformer is less than one second. The multifunction tester for the flashlight of the camera tests the rare short and the lifetime on the production line of the trigger, the trigger rate of speed is 50 time/second, testing ten thousand times trigger costs about 3, 4 minutes. The multifunction tester for the flashlight of the camera has wide testing content, can not only measure the charging time, the oscillating frequency, the waveform and the lifetime of the components, but also be matched with the printer printing the testing data. The multifunction tester for the flashlight of the camera is not only suitable for the production plant of the flashlight of the camera, but also for general service units which maintain the flashlight.

Description

Multifunction tester for camera's flashlight

The utility model belongs to electronic devices and components measuring instrument field.

At present, the output straight line of China's camera flashlamp rises, the main quality index of high-quality camera flashlamp (device) is: be switched between the neon lamp build-up of luminance (being designated as dormant state) from flash generator (3V or 6V) and require≤9 seconds, the life requirements of flash lamp tube＞5000 time, these two indexs are decided by flash lamp tube, oscillistor, energy-storage capacitor, oscillation transformer and trigger.But the present oscillation transformer of producing lacks advanced measuring means, and some producers measure the duration of charging with hand by " stopwatch " reading, and the detection error is big, efficient is low, simultaneously, camera flashlamp loss percentage after dispatching from the factory is higher, and maintenance capacity is big, presses for effective detecting instrument.The utility model has designed a kind of novel flashlamp multi-tester at above-mentioned shortcoming.

The purpose of this utility model is quick test and measures the quality index of generator triode, trigger, vibration transformation, energy storage capacitor, neon lamp and the flash lamp tube of flashlamp.

Technical solution of the present utility model is:

(1) 1/50 second, 10 seconds, 20 seconds, 40 seconds, 60 seconds output terminals at multistage frequency division (3) are connected to K ₁, can provide many retainings to select the regularly triggering cycle, thereby automatically to the tested part oscillation transformer (8) in the flash lamp circuit.The periodicity of carrying out trigger circuit (13) etc. repeats to trigger and a plurality of index detects.

(2) between tested trigger circuit (13) and tested flashlamp (14), be connected to trigger partial short-circuit testing circuit (27), send the F signal, whether the partial short-circuit of 1-2 astragal is arranged in order to detection triggers to slowed sweep oscilloscope.

(3) at diode (9) positive pole and K ₂Between be connected to energy-storage capacitor (10), this energy storage capacitor is by C _GreatlyAnd C _LittleConstitute, pass through K ₂Select, so that in the permissible error scope, tested part and standardized element are compared detection.

(4) multi-functional output terminal (F, D are arranged in instrument ₁, A ₁, E etc.) be connected with display terminals such as universal counter, slowed sweep oscilloscopes so that read (or printing) data and observe waveform.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is a camera flashlamp multi-tester electrical schematic diagram.It is by the timing circuit unit, and the vibration of 3V flashlamp, triggering checking circuit unit, the vibration of 3V type flashlamp, trigger criteria circuit unit, 6V type flashlamp vibrate, trigger checking circuit unit, the vibration of 6V type flashlamp, trigger criteria circuit unit D.C. regulated power supply (1) and voltage monitoring thereof, meter circuit compositions such as (4).Wherein:

(1) timing circuit unit

It comprises: timing oscillator (2), multistage frequency divider (3), timing indicating circuit (5), timing selecting switch K ₁, 3V type timing initial pulse shaping circuit and timing stopping pulse shaping circuit (17) and (18), 6V type timing initial pulse shaping circuit and timing stopping pulse shaping circuit (22) and (23), single slow scanning triggering for generating circuit (19) (it send single trigger pip E desynchronize touch slowed sweep oscilloscope).

Multistage frequency divider (3) produces 1/50 second, 10 seconds, 20 seconds, 40 seconds, 60 seconds triggertiming pulses.Time switch K ₁The timing cycle that select to need go the trigger flashing circuit for lamp bright, go out, 1/50 pulse per second (PPS) is carried out ten thousand durability tests to trigger and is used.Each trigger ten thousand times triggers 3.3 minutes times spent of test, and bright three times or " 40 seconds " of timing indicator " 10 seconds " are once bright, when reminding the checker from voltage table (12) get on to read charging 30 seconds or 40 seconds, and the charging voltage U on the main energy-storage capacitor C _CWhether reach stationary value-360V, K ₆Whether the work of control single slow scanning triggering for generating circuit.

(2) 3V type flashlamp vibration, the checking circuit unit that triggers

It comprises: charging current monitoring current table (6), tested generator triode (7), tested oscillation transformer (8), oscillating impulse commutation diode (9), tested energy-storage capacitor (10), tested neon lamp circuit (11) (sending build-up of luminance signal C '), charging voltage U _C(monitoring voltage table (12) 260V), tested flip-flop circuit (13) (are sent trigger pip B with the neon lamp starting voltage ₁'), the electronic switch (15) that triggers of tested flash lamp tube (14), control flash lamp tube self-timing (is K ₃), the checking circuit (27) of trigger partial short-circuit, it is sent signal F and monitors to slowed sweep oscilloscope.

The oscillating impulse D that generator triode is sent ₁For oscillating impulse frequency or waveform measurement.Blockage has C in (10) _GreatlyAnd C _LittleTwo keep off, use K switch ₂Select.C _GreatlyThe energy-storage capacitor shelves are the flash lamp circuit normal operating conditions; C _LittleThe energy-storage capacitor shelves are the quick test shelves to parts such as oscillation transformers, C _GreatlyOn send exponential type charging voltage A ₁Detect for charge waveforms.

Quick test is following to be carried out: K ₂Connect to C _LittleShelves, neon lamp build-up of luminance immediately represent that measured piece (for example oscillation transformer etc.) is " available " product, from two track slowed sweep oscilloscopes, show that the oscillating impulse waveform that the qualified oscillation transformer of tested oscillation transformer and standard produces contrasts simultaneously.According to the range of allowable error of waveform parameter, can judge whether parts such as tested oscillation transformer qualified, its proving time＜＜1 second.

Utilize the checking circuit (27) of trigger partial short-circuit, be connected between tested flip-flop circuit (13) and the tested flash lamp tube (14) logical F end and send slowed sweep oscilloscope to indicate, can check out the hidden danger that 1-2 astragal partial short-circuit is arranged in the trigger.

Utilize in this checking circuit unit, be installed in oscillating crystal triode on the operator's console, oscillation transformer, trigger, energy-storage capacitor, neon lamp, flash lamp tube plugged and unplugged seat, can make things convenient for, differentiate effectively that client send the above-mentioned critical part in the bad camera flashlamp of repairing whether normal? this maintenance service for flashlamp provides effective maintenance instrument.

(3) 3V type flashlamp vibration, the preferred circuit unit (16) that triggers

What this circuit unit was installed is the standard qualified part, also can be the specification product of a certain producer.Utilize this circuit unit, the quality of comparison and detection our factory like products if find out the product of the quality of a certain part not as certain factory, can be utilized this instrumental analysis, test, finds the problem, and improves production technology.

Utilize the voltage table in the blockage (12), can detect the starting voltage value of neon lamp and energy storage capacitor C after charging 30 seconds, U _CWhether reach-(360 ± 5) V.

(4) 6V type flashlamp vibration, the checking circuit unit (20) that triggers

The vibration of 6V type flashlamp, the preferred circuit unit (21) that triggers

Their circuit composition is similar to corresponding 3V type circuit unit with principle of work, and just some part specifications and circuit parameter are different.

(5) D.C. regulated power supply unit (1) and supply voltage monitoring meter circuit (4)

This unit produces the various D.C. regulated power supplies of this machine, and there is the DC voltage gauge outfit unit in (4), uses K switch ₄Each grade of conversion monitoring supply voltage value.

In addition, when the life-span number of times to trigger detected, timing selecting switch was beaten in 1/50 second shelves, K switch ₅Beat at external (producing)-360V direct supply shelves by unit 1.Otherwise, on the energy-storage capacitor-360V power supply can not adapt to the fast triggering speed of per second 50 times.

Advantage of the present utility model (1) is carried out fast detecting to the product on the oscillation transformer production line, utilizes the permissible error of little charging capacitor shelves and comparison measurement control performance index, and reaches fast detecting.Every oscillation transformer the detection time＜＜1 second.(2) check of the partial short-circuit on the trigger production line and longevity test fast trigger rate detection for 50 times with per second and trigger time spent, about 3.4 minutes 10,000 times.(3) can be for the quality index complete detection of oscillation transformer and trigger product.(4) the flashlamp cycle of triggering can be selected arbitrarily among 10 seconds, 20 seconds, 40 seconds, 60 seconds, repeated, triggered automatically and carry out periodicity.(5) this instrument has the detectability to other part of flashlamp of 3V type, two kinds of different sizes of 6V type.(6) be used for the maintenance business, can differentiate the quality of oscillistor, oscillation transformer, trigger, flash lamp tube, energy storage capacitor and neon lamp.Be a kind of main unit test instrument in addition of novel flashlamp of practicality, parts factory and maintenance department provide convenience in addition for flashlamp.

The utility model can match and measure t respectively with universal counter, printer, general pair of track slowed sweep oscilloscope _Rise, oscillation frequency oscillation transformer life-span, the waveform of oscillating impulse and the charge waveforms of main energy storage capacitor C.

Charging current and charging voltage monitoring gauge outfit, build-up of luminance indication, regularly indication, switch, every index test hole etc. are arranged on the panel of this instrument.Have on the operator's console tested oscillation transformer and tested transformer socket several.The measuring accuracy of this instrument depends on that (for example time measurement precision can reach 10 for the universal counter that matches with it and the measuring accuracy of slowed sweep oscilloscope ^-6Second), so not high to the manufacturing technique requirent of this detector, can also check the waste product that touches the trigger partial short-circuit.

Claims (3)

1, a kind of by timing circuit, vibration, triggering checking circuit, the flashlamp multi-tester that vibration trigger criteria circuit and mu balanced circuit [1] are constituted, it is characterized in that, between tested trigger circuit [13] and tested flashlamp [14], be connected to trigger partial short-circuit testing circuit [27], the partial short-circuit whether 1～2 astragal can detection triggers be arranged is at the positive pole and the K of diode [9] ₂Between be connected to energy storage capacitor so that in the permissible error scope, tested part and standardized element are compared detection, realize the product fast detecting on the production line, be connected to K at 1/50 second, 10 seconds, 20 seconds, 40 seconds, 60 seconds output terminals of multistage frequency divider [3] ₁Thereby, can provide many retainings to select the regularly triggering cycle, automatically the part in the flash lamp circuit, oscillation transformer [8], trigger circuit [13] etc. are carried out many index tests and inspection.

2, according to the multi-tester of flashlamp described in the claim 1, it is characterized in that: energy storage capacitor (10) is by C _GreatlyAnd C _LittleConstitute, pass through K ₂Select C _GreatlyEnergy storage capacitor links to each other with the positive pole of diode (9), sends exponential type charging voltage A ₁For detecting charge waveforms, C _LittleEnergy storage capacitor and diode (9) positive pole and K ₅Link to each other, can pass through the build-up of luminance fast detecting oscillation transformer parts such as (8) of neon lamp (11).

3, according to the flashlamp multi-tester described in the claim 1,2, it is characterized in that multi-functional output terminal (F, the D of instrument ₁, A, E etc.) can be connected with display terminals such as universal counter, slowed sweep oscilloscopes so that read (or printing) data and observe waveform.

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