CN202547582U - Length measuring system of coaxial cable - Google Patents
Length measuring system of coaxial cable Download PDFInfo
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- CN202547582U CN202547582U CN2012201254374U CN201220125437U CN202547582U CN 202547582 U CN202547582 U CN 202547582U CN 2012201254374 U CN2012201254374 U CN 2012201254374U CN 201220125437 U CN201220125437 U CN 201220125437U CN 202547582 U CN202547582 U CN 202547582U
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- cable
- measuring system
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Abstract
The utility model discloses a length measuring system of a coaxial cable. The length measuring system of the coaxial cable includes a microprocessor module, a display circuit, a press button circuit and a length/frequency converting circuit. The display circuit and the press button circuit connect with the microprocessor module respectively. The length/frequency converting circuit is provide with two cable joints used for connecting with two ends of the coaxial cable and a shield grounding joint used for connecting with a shield joint of the coaxial cable. An output terminal of the length/frequency converting circuit connects with the microprocessor module. The utility model adopts the length/frequency converting circuit to convert the length of the cable to a frequency signal in proportion to the length, and can realize the measurement of coaxial cables made of different materials or tests under different requirements. The length measuring system of the coaxial cable has comparatively high universality and practical value, and works stably and measures accurately and reliably. The length measuring system of the coaxial cable has a good application prospect.
Description
Technical field
The utility model relates to the power engineering monitoring technical field, is specifically related to a kind of concentric cable length measuring system.
Background technology
In real work, often need measure physical length, relative length, equivalent length of concentric cable etc. accurately.Because when directly surveying length,, cause and measure inaccurate or, suitable directly measurement because cable is very long because cable inconvenience is stretching with chi.When using electric signal that cable is measured, because electric signal is propagated on stub cable, the time compole that is experienced is short, generally 10
-9S ~ 10
-7In the s scope, so will accomplish very difficulty of accurate measurement.
The utility model content
The purpose of the utility model is a physical length difficulty of measuring concentric cable in the prior art in order to overcome, and the not high problem of measuring accuracy.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
A kind of concentric cable length measuring system; Comprise microprocessor module, display circuit and key circuit; Said display circuit, key circuit are connected with microprocessor module respectively; It is characterized in that: also comprise the length/frequency conversion circuit; Said length/frequency conversion circuit is provided with two cable splices that are used for being connected with the two ends of concentric cable and the bonding joint that is used for being connected with the shielded joint of concentric cable, and the output terminal of said length/frequency conversion circuit is connected with microprocessor module.
Aforesaid concentric cable length measuring system is characterized in that: also comprise indicating circuit, watchdog circuit and power circuit, said indicating circuit, watchdog circuit and power circuit are connected with microprocessor module respectively.
Aforesaid concentric cable length measuring system; It is characterized in that: said length/frequency conversion circuit also comprises first Technitron and second Technitron; The collector of said first Technitron is connected with one of them cable splice; Be provided with electric capacity between the base stage of said first Technitron and second Technitron; And be connected with another cable interface jointly, the emitter of said first Technitron and second Technitron, bonding joint are connected with ground jointly, and the collector of said second Technitron is connected with microprocessor module as the output terminal of length/frequency conversion circuit.
Aforesaid concentric cable length measuring system is characterized in that: the collector of said first Technitron, second Technitron also is connected with high level through resistance respectively with the base stage of second Technitron.
The beneficial effect of the utility model is: the utility model adopts the length/frequency conversion circuit; Cable length is transformed into and the proportional frequency signal of length, and microprocessor module carries out the length of measurements and calculations cable to this frequency signal, and the result is passed through the display demonstration export; Can also be through key circuit input correlation parameter; Completion is to the measurement of the concentric cable of unlike material or accomplish the test of demands of different, has high generality and practical value, and working stability; Measure accurately and reliably, have a good application prospect.
Description of drawings
Fig. 1 is the system chart of the concentric cable length measuring system of the utility model.
Fig. 2 is the schematic diagram of the length/frequency conversion circuit of the utility model.
Embodiment
To combine Figure of description below, the utility model will be further described.
Like Fig. 1 and shown in Figure 2; A kind of concentric cable length measuring system; Comprise microprocessor module, display circuit, key circuit and length/frequency conversion circuit; Said display circuit, key circuit are connected with microprocessor module respectively, and said length/frequency conversion circuit is provided with two cable splice A and the B that is used for being connected with the two ends of concentric cable, is used for the bonding joint C that is connected with the shielded joint of concentric cable; The output terminal D of said length/frequency conversion circuit is connected with microprocessor module; Wherein display circuit is used to show the information such as physical length, relative length, equivalent length of the concentric cable that measures, and key circuit is used to import correlation parameter, accomplishes the measurement of the concentric cable of unlike material or accomplishes the test of demands of different; The length/frequency conversion circuit is used for cable length is transformed into and the proportional frequency signal of length; Input to microprocessor module and handle, bonding joint C is used to shield external electric signal to be disturbed, and improves the degree of accuracy of measuring.
The concentric cable length measuring system also comprises indicating circuit, watchdog circuit and power circuit; Said indicating circuit, watchdog circuit and power circuit are connected with microprocessor module respectively; Indicating circuit is used to point out the duty of this measurement mechanism of survey crew; Comprise two pilot lamp, device was in proper working order when green light lighted, device operation irregularity when red light lights.Misoperation causes in the time of possibly being the button input; Power circuit is used for working power to microprocessor module being provided; Watchdog circuit is used for anti-locking apparatus in use; Device is restarted in unexpected collapse (such as electrostatic interference and other bad working environment), guarantees the operate as normal of concentric cable length measuring system.
Said length/frequency conversion circuit also comprises the first Technitron Q1 and the second Technitron Q2; The collector of the said first Technitron Q1 is connected with one of them cable splice A; Be provided with capacitor C 1 between the base stage of the said first Technitron Q1 and the second Technitron Q2; And be connected with another cable interface B jointly; The emitter of the said first Technitron Q1 and the second Technitron Q2, bonding joint C are connected with ground jointly; The collector of the said second Technitron Q2 is connected with microprocessor module as the output terminal D of length/frequency conversion circuit; The collector of the said first Technitron Q1, the second Technitron Q2 and the base stage of the second Technitron Q2 also are connected through resistance R 1 (size can be 330 Europe), R2 (size can be 12 kilo-ohms) and R3 (size can be 800 Europe) and high level (for positive 5 volts) respectively, and wherein can to select model for use be the 2SC3358 triode for Technitron Q1 and Q2, and capacitor C 1 size is 0.1F.
The concrete course of work of the utility model is following: the heart yearn at measured concentric cable two ends meets cable splice A and B respectively; The shielding of cable connects electronic circuit and is connected with ground jointly with bonding joint C, and when Technitron Q1 current collection very during high level, high level signal is sent to the base stage of Q1 by concentric cable elapsed-time standards t; Make the quick conducting of Q1; The collector of Q1 becomes low level, and this low level is sent to the base stage of Q1 by concentric cable elapsed time t, and transistor Q1 ends fast; In transistor Q1 circuit, produce pulse width is the square wave of t like this, and the cycle of square wave is T=2t.The length of concentric cable is long more, and the cycle of square wave is long more, and cable length is directly proportional with the cycle of square wave, i.e. L=KT.And frequency is f=1/T; L=K/f then; Microprocessor module is through after handling the square-wave signal of importing; Just can obtain the length of respective coaxial cables, and show through display circuit, survey crew can also be selected the measurement of the concentric cable of unlike material or accomplishes the test of demands of different through button.
In sum, the utility model adopts the length/frequency conversion circuit, and cable length is transformed into and the proportional frequency signal of length; Microprocessor module carries out the length of measurements and calculations cable to this frequency signal; And the result is passed through the display demonstration export, can also be through key circuit input correlation parameter, the test of demands of different is perhaps accomplished in completion to the measurement of the concentric cable of unlike material; Have high generality and practical value; And working stability is measured accurately and reliably, has a good application prospect.
More than show and described ultimate principle, principal character and the advantage of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the instructions that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (4)
1. concentric cable length measuring system; Comprise microprocessor module, display circuit and key circuit; Said display circuit, key circuit are connected with microprocessor module respectively; It is characterized in that: also comprise the length/frequency conversion circuit; Said length/frequency conversion circuit is provided with two cable splices that are used for being connected with the two ends of concentric cable and the bonding joint that is used for being connected with the shielded joint of concentric cable, and the output terminal of said length/frequency conversion circuit is connected with microprocessor module.
2. concentric cable length measuring system according to claim 1 is characterized in that: also comprise indicating circuit, watchdog circuit and power circuit, said indicating circuit, watchdog circuit and power circuit are connected with microprocessor module respectively.
3. concentric cable length measuring system according to claim 1 and 2; It is characterized in that: said length/frequency conversion circuit also comprises first Technitron and second Technitron; The collector of said first Technitron is connected with one of them cable splice; Be provided with electric capacity between the base stage of said first Technitron and second Technitron; And be connected with another cable interface jointly, the emitter of said first Technitron and second Technitron, bonding joint are connected with ground jointly, and the collector of said second Technitron is connected with microprocessor module as the output terminal of length/frequency conversion circuit.
4. concentric cable length measuring system according to claim 3 is characterized in that: the collector of said first Technitron, second Technitron also is connected with high level through resistance respectively with the base stage of second Technitron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201254374U CN202547582U (en) | 2012-03-29 | 2012-03-29 | Length measuring system of coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201254374U CN202547582U (en) | 2012-03-29 | 2012-03-29 | Length measuring system of coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202547582U true CN202547582U (en) | 2012-11-21 |
Family
ID=47168200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201254374U Expired - Fee Related CN202547582U (en) | 2012-03-29 | 2012-03-29 | Length measuring system of coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202547582U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607395A (en) * | 2012-03-29 | 2012-07-25 | 江苏三通仪器系统有限公司 | Coaxial cable length measuring system |
-
2012
- 2012-03-29 CN CN2012201254374U patent/CN202547582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607395A (en) * | 2012-03-29 | 2012-07-25 | 江苏三通仪器系统有限公司 | Coaxial cable length measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20130329 |