CN2156503Y - Gold and silver jewelry testing instrument - Google Patents
Gold and silver jewelry testing instrument Download PDFInfo
- Publication number
- CN2156503Y CN2156503Y CN 93210845 CN93210845U CN2156503Y CN 2156503 Y CN2156503 Y CN 2156503Y CN 93210845 CN93210845 CN 93210845 CN 93210845 U CN93210845 U CN 93210845U CN 2156503 Y CN2156503 Y CN 2156503Y
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- CN
- China
- Prior art keywords
- amplifier
- circuit
- detecting device
- tester
- gold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model relates to a special gold and silver jewelry testing instrument, mainly comprising an X-ray source, a seeker, a high-voltage circuit for the seeker operation, a pre-amplifier, a main amplifier for discriminating, enlarging and sampling, and holding the output signals of the pre-amplifier and an arithmetic processor. The measured jewelry is irradiated by the X-ray to excite the jewelry to generate the X fluorescence. The X fluorescence received by the seeker generates a voltage pulse signal. The voltage pulse signal is dealt by the pre-amplifier and the main amplifier, and then is sent to the arithmetic processor to carry out the data process, so the gold content of the jewelry is gained.
Description
The utility model belongs to the tenor tester, is a kind of tester that is exclusively used in jewel.
At present, to the test employing standard usually of jewel convert board convert than method or hydrometer method the former need by rule of thumb, measuring error is bigger, and jewellery are had wearing and tearing, its speed is also slower; Latter's troublesome poeration, the structural problem of jewellery itself has also caused measuring accuracy lower in addition, in addition, also can't accurately measure for some this method of jewellery gold-plated or covered with gold leaf.
The purpose of this utility model provides a kind of quick, accurate, and does not damage the jewel tester of jewellery.
Solution of the present utility model is: the jewel tester that is provided has that a natural X source to sample emission X ray, one are accepted the nuclear physics detecting device of the X photoluminescence line that sample sends and for the high-tension circuit of nuclear physics detecting device work, output terminal at the nuclear physics detecting device is connected to a prime amplifier that measured signal is detected and amplifies, the output terminal of this prime amplifier is connected to be screened output signal, the main amplifier that amplifies and sample and keep, the output terminal and the arithmetic processor of this main amplifier join.
Below in conjunction with accompanying drawing content of the present utility model is illustrated.
Fig. 1 is a frame principle figure of the present utility model.
Fig. 2 is a high-tension circuit schematic diagram of the present utility model.
Fig. 3 is a prime amplifier schematic diagram of the present utility model.
Fig. 4 is a main amplifier schematic diagram of the present utility model.
Fig. 5 is an one-piece construction outside drawing of the present utility model.
As shown in Figure 1: during test, jewellery 1 are placed on the objective table.X source 2 can adopt Fe
And so on material, 21 pairs of jewellery 1 of the simple X ray that it sends shine, and excite jewellery to produce secondary X-ray, promptly X fluorescence 11, this X fluorescence is relevant with element and content thereof in the jewellery.X fluorescence is detected and promptly produces a voltage pulse signal after device 3 receives, this pulse signal detects required detection signal through prime amplifier 5, and amplifies, and screens, amplifies and the sampling maintenance through main amplifier 6 again, send arithmetic processor 7 to carry out data processing, draw the gold content of jewellery 1.Said process is operated and is controlled by operator's console 8.Detector 3 can adopt the sodium iodide scintillation crystal, but preferably adopts proportional counter tube.After X fluorescence passes through the proportional counter tube window, promptly on its anodic wire, produce a voltage pulse signal, the operating voltage of proportional counter tube is provided by high-tension circuit 4.
High-tension circuit as shown in Figure 2, it is by oscillatory circuit 41, Switching Power Supply 46, voltage-multiplying circuit 42 and forms oscillatory circuit 41 by the sampling comparator circuit 43 that high pressure output feeds back to oscillatory circuit and be made up of resistance, the electric capacity of two Sheffer stroke gate YF1 and periphery; Switching Power Supply 46 is made up of triode G41 and transformer B, and voltage-multiplying circuit 42 is made up of four diode G42 and electric capacity; Sampling comparator circuit 43 is mainly formed oscillatory circuit 41 by operational amplifier F1, F2, triode G43 and standard of precision voltage device 44 and is produced fixing hunting of frequency, produce high pulse voltage through Switching Power Supply 46, produce high DC voltage through voltage-multiplying circuit 42 again, this high direct voltage is delivered to comparator circuit 43 again and is compared with voltage reference, its comparative result is fed back to the oscillatory circuit part, thereby adjust the dutycycle of oscillatory circuit output signal, high pressure is stablized.Numbering 45 is the driving circuits that are made of two Sheffer stroke gate YF2 among the figure, and its effect provides the driving force that big electric current improves circuit.A is an output terminal among the figure, and it links to each other with the anode of aforesaid proportional counter tube.Four Sheffer stroke gates in this circuit adopt the CD4011 integrated component, and two operational amplifiers adopt the LM358 integrated component, and the model of reference voltage device is 1403.This high-tension circuit is owing to adopted the control mode that compares, feeds back, so high pressure output is highly stable, and it is little to drift about, also especially little to the influence of signal
Preamplifier circuit as shown in Figure 3, it is made up of importation 51, amplifier section 52 and output 53, importation 51 mainly is made of field effect transistor G51, therefore model is 2N4416, has good signal-to-noise performance.Detector signal is by the input of b end, and additional noise ground does not detect required detection signal because detection signal is very weak, so also need amplify through the importation.Amplifier section 52 mainly is made up of four triode G52, G53, G54, G55, and it carries out linear amplification with detection signal.Output 53 mainly is made up of triode G56, G57.C is an output terminal, and its effect is that the detection signal after amplifying can be mated with main amplifier 6 well.For fear of external interference, whole prime amplifier 5 places in the shielding box, and its incoming line adopts shielding line.
The profile of this tester housing 81 as shown in Figure 5 is a cuboid, in circuit board 82 is housed.Be provided with the window 83 of a band net above the housing, be used for placing tested jewellery figure numbering 84-switch, 85-display part, B-transformer, 86-integrated component
Survey golden clothes with existing jewellery and put with method of testing and compare, the utility model has the advantage of: fast, accurately, to the jewellery not damaged, and whole operating process all can carry out automatically, and small volume.
Claims (3)
1, a kind of jewel tester, it is characterized in that having a natural X source (2) to sample emission X ray, nuclear physics detecting device (3) of accepting the X photoluminescence line that sample sends and for the high-tension circuit (4) of nuclear physics detecting device (3) work, output terminal at nuclear physics detecting device (3) is connected to a prime amplifier (5) that measured signal is detected and amplifies, the output terminal of this prime amplifier (5) is connected to be screened output signal, the main amplifier (6) that amplifies and sample and keep, output terminal of this main amplifier (6) and arithmetic processor (7) join.
2, tester as claimed in claim 1 is characterized in that said nuclear physics detecting device (3) is a proportional counter tube.
3, tester as claimed in claim 2 is characterized in that said high-tension circuit (4) forms by oscillatory circuit (41), Switching Power Supply (46), voltage-multiplying circuit (42) with by the sampling comparator circuit (43) that high pressure output feeds back to oscillatory circuit (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210845 CN2156503Y (en) | 1993-04-27 | 1993-04-27 | Gold and silver jewelry testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210845 CN2156503Y (en) | 1993-04-27 | 1993-04-27 | Gold and silver jewelry testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2156503Y true CN2156503Y (en) | 1994-02-16 |
Family
ID=33792637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93210845 Expired - Fee Related CN2156503Y (en) | 1993-04-27 | 1993-04-27 | Gold and silver jewelry testing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2156503Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI563819B (en) * | 2011-03-31 | 2016-12-21 | Hon Hai Prec Ind Co Ltd | Mobile phone with purity of matter detection function and method for detecting purity of matter using same |
-
1993
- 1993-04-27 CN CN 93210845 patent/CN2156503Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI563819B (en) * | 2011-03-31 | 2016-12-21 | Hon Hai Prec Ind Co Ltd | Mobile phone with purity of matter detection function and method for detecting purity of matter using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |