CN104142429A - Resistor resistance value estimating device and control circuit thereof - Google Patents
Resistor resistance value estimating device and control circuit thereof Download PDFInfo
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- CN104142429A CN104142429A CN201310170105.7A CN201310170105A CN104142429A CN 104142429 A CN104142429 A CN 104142429A CN 201310170105 A CN201310170105 A CN 201310170105A CN 104142429 A CN104142429 A CN 104142429A
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Abstract
The invention discloses a resistor resistance value estimating device and a control circuit of the resistor resistance value estimating device. The device comprises a workbench. A plurality of standard resistor connected-in bases and a direct current power supply base used for containing a direct current power supply are arranged on the workbench. A control circuit board is embedded into the workbench. The control circuit board is provided with a 555 timer, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a buzzer. A pin at the discharging end 7 of the 555 timer is connected with the positive electrode of the direct current power supply base through the first resistor R1, and a pin at the lower trigger end 2 of the 555 timer is connected with the pin at the discharging end 7 of the 555 timer through the third resistor R3 and the second resistor R2 in sequence. The resistor resistance value estimating device has the advantages of being small, exquisite, simple, reliable and the like, is composed of only a few of small elements, and is quite small in size, capable of being carried about and low in cost.
Description
[technical field]
The present invention relates to a kind of detecting instrument design field, particularly relate to a kind of device and control circuit thereof of estimating resistance.
[background technology]
On-the-spot in circuit fabrication at present, each product line all arranges a testing staff, after circuit board is produced, just need to detect, on check circuit plate, whether resistance welded is correct, and it is right whether resistance value is selected, so just need utilization that operating personnel can be real-time can portable instrument roughly to calculate the resistance value situation of each circuit board, when occurring that error is to keep in repair in very first time feedback, and do not need to wait until that last quality supervision department asks a question.When detecting resistance, conventionally use special-purpose multimeter to detect, but multimeter price also needs thousands of units at least, and be also unfavorable for carrying.So just have to be supplied a kind of more easyly, cost is lower, more portative resistance estimation frock, so that can each operating personnel's staff one, the condition of production of testing circuit plate, pinpoints the problems in time whenever and wherever possible, and deals with problems.
[summary of the invention]
In view of above-mentioned condition, be necessary to provide a kind of device and control circuit thereof of estimating resistance, concrete structure is as follows:
A kind of device of estimating resistance, it comprises: a worktable, on described worktable, be provided with a plurality of measuring resistances access seat and for the direct current source(-)holder of accommodating direct supply, described worktable is embedded in control circuit board, is provided with 555 timers, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2 and hummer on described control circuit board; Discharge end 7 pin of described 555 timers connect the positive pole of described direct current source(-)holder by the first resistance R 1, low triggering end 2 pin of described 555 timers are connected discharge end 7 pin of described 555 timers successively with the second resistance R 2 by described the 3rd resistance R 3, the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 and low triggering end 2 pin of described 555 timers are drawn respectively two contacts for being connected the two ends of testing resistance; High-triggering end 6 pin of described 555 timers directly connect low triggering end 2 pin of described 555 timers, and the negative pole of 1 pin and described direct current source(-)holder is held on the ground that connects described 555 timers by described the first capacitor C 1, output terminal 3 pin of described 555 timers connect one end of described hummer by the second capacitor C 2, the other end of described hummer is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct current source(-)holder, described 555 timers;
A contact of drawing from low triggering end 2 pin of described 555 timers is also connected with one end of described a plurality of measuring resistance access seats respectively, between the contact that the other end of described a plurality of measuring resistance access seats and the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 are drawn, gating switch is set, for selectivity, is electrically connected to arbitrary one end of the other end and the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 of one end of testing resistance, the arbitrary access seat of a plurality of measuring resistance access seat.
Based on technique scheme, on described control circuit board, be also provided with digital display counting device, output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device, and the display screen of described digital display counting device exposes to described worktable surface.
Based on technique scheme, the resistance of described a plurality of standard detection resistance increases successively.
Based on technique scheme, gating switch K on described control circuit board is single pole multiple throw, the contact that the intermediate node that singly enters end described the 3rd resistance R 3 of connection and the second resistance R 2 of described single pole multiple throw is drawn, the end that has more of described single pole multiple throw connects respectively the other end that described a plurality of measuring resistance accesses seat.
Based on technique scheme, a kind of control circuit of estimating resistance is also provided, and described circuit comprises a plurality of measuring resistances, 555 timers, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2, hummer and direct supply; Discharge end 7 pin of described 555 timers connect the positive pole of described direct supply by the first resistance R 1, low triggering end 2 pin of described 555 timers are connected discharge end 7 pin of described 555 timers successively with the second resistance R 2 by described the 3rd resistance R 3, the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 and low triggering end 2 pin of described 555 timers are drawn respectively two contacts for being connected the two ends of testing resistance; High-triggering end 6 pin of described 555 timers directly connect low triggering end 2 pin of described 555 timers, and the negative pole of 1 pin and described direct supply is held on the ground that connects described 555 timers by described the first capacitor C 1, output terminal 3 pin of described 555 timers connect one end of described hummer by the second capacitor C 2, the other end of described hummer is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct supply, described 555 timers;
A contact of drawing from low triggering end 2 pin of described 555 timers is also connected with one end of described a plurality of measuring resistances respectively, between the contact that the intermediate node of the other end of described a plurality of measuring resistances and described the 3rd resistance R 3 and the second resistance R 2 is drawn, gating switch is set, for selectivity, is electrically connected to the intermediate node of one end of testing resistance, arbitrary one end of the other end of a plurality of measuring resistances and described the 3rd resistance R 3 and the second resistance R 2.
Based on technique scheme, described circuit board also comprises digital display counting device, and output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device.
Based on technique scheme, the resistance of described a plurality of standard detection resistance increases successively.
Based on technique scheme, described gating switch is single pole multiple throw, described single pole multiple throw singly enter the contact that intermediate node that end connects described the 3rd resistance R 3 and the second resistance R 2 is drawn, described single pole multiple throw have more the other end that end connects respectively described a plurality of measuring resistances.
Control circuit provided by the invention and device adopt easy resistance estimation measurement circuit design, have the advantages such as small and exquisite, simple, reliable, and only several little components and parts form, and volume is very little, can carry, and cost are also only in ten yuan, very low.By testing resistance is connected in circuit, and indicate by the sound of hummer the numerical range that estimates resistance, can solve Cost Problems and the efficiency that need to bring with multimeter.
[accompanying drawing explanation]
Fig. 1 is electrical block diagram of the present invention.
[embodiment]
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing, provided preferred embodiment of the present invention.But the present invention can realize in many different forms, be not limited to embodiment described herein.On the contrary, providing the object of these embodiment is to make to the understanding of disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, can directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.Term as used herein " vertical ", " level ", " left side ", " right side " and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology of using are herein identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term using in instructions of the present invention herein, just in order to describe the object of specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
Refer to Fig. 1, embodiment of the present invention based on technique scheme, a kind of control circuit of estimating resistance is also provided, and described circuit comprises a plurality of measuring resistance R4-R9,555 timer IC1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2, hummer LS1 and direct supply BT1; Discharge end 7 pin of described 555 timer IC1 connect the positive pole of described direct supply BT1 by the first resistance R 1, low triggering end 2 pin of described 555 timer IC1 are connected discharge end 7 pin of described 555 timer IC1 successively with the second resistance R 2 by described the 3rd resistance R 3, the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 and low triggering end 2 pin of described 555 timer IC1 are drawn respectively two contacts for being connected the two ends of testing resistance Rx; High-triggering end 6 pin of described 555 timer IC1 directly connect low triggering end 2 pin of described 555 timer IC1, the negative pole of 1 pin and described direct supply BT1 is held on the ground that also connects described 555 timer IC1 by described the first capacitor C 1, output terminal 3 pin of described 555 timer IC1 connect one end of described hummer LS1 by the second capacitor C 2, the other end of described hummer LS1 is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct supply BT1, described 555 timer IC1; A contact of drawing from low triggering end 2 pin of described 555 timer IC1 is also connected with one end of described a plurality of measuring resistance R4-R9 respectively, between the contact that the intermediate node of the other end of described a plurality of measuring resistance R4-R9 (K1-K6) and described the 3rd resistance R 3 and the second resistance R 2 is drawn, gating switch K is set, for selectivity, is electrically connected to arbitrary one end of the other end (K1-K6) and the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 of one end Kx, a plurality of measuring resistance R4-R9 of testing resistance.
Based on foregoing circuit, when the other end of a contact that the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 is drawn and a plurality of measuring resistance R4-R9 is connected, hummer LS1 can send different sound by root different frequency, according to this point, the sound frequency whether sound frequency producing in the time of can be by comparison testing resistance Rx place in circuit produces during with corresponding measuring resistance R4-R9 place in circuit is identical, if identical, testing resistance Rx is similar to the resistance of corresponding measuring resistance, as the result of estimation resistance.The resonant circuit that above-mentioned 555 timer IC1 form, above-mentioned the first capacitor C 1 is oscillating capacitance, and the second capacitor C 2 is coupling capacitance, and the cycle T of resonant circuit is
T=0.693[R1+2 (R2+R3Ra/ (R3+Ra))], wherein Ra is the selected resistance R x of gating switch K or R4-R9;
Measuring resistance R4-R9 estimates known resistance in circuit as survey, can increase successively from small to large selection, such as being respectively 10 ohm to 1M ohm; Be used as and testing resistance Rx comparison; K is gating switch, rotatably respectively with the arbitrary end in contact of Kx K1-K6.In foregoing circuit structure, for holding circuit structure, avoid peak voltge surge equally, at the side of the positive electrode of direct supply BT1, switch S 1 is set.
Based on said structure, at this, give most preferred embodiment, wherein, select six measuring resistance R4-R9, resistance is respectively 10 ohm, 100 ohm, 1K ohm, 10K ohm, 100K ohm, 1M ohm.The first resistance R 1 resistance is 1K ohm, and the second resistance R 2 resistances are that 560 ohm, the 3rd resistance R 3 resistances are 47M ohm, and the first capacitor C 1 is 0.15 μ F, and the second resistance C2 is 100 μ F, and direct supply BT1 adopts 6V battery.S1 switch closes before test, first test circuit, with gating switch K, contact respectively K1 to K6, now LS1 hummer can send respectively 6 kinds of different sound, and because of the cycle of output signal be T=0.693[R1+2 (R2+R3Ra/ (R3+Ra))], Ra(is R4-R9) less, cycle is longer, sound is rapid from slowly becoming, and remembers the LS1 hummer length of roughly pronouncing, and completes test.Again measured resistance Rx is connect as in circuit, gating switch K is connected to one end Kx point of testing resistance; Now the cycle of output signal is T=0.693[R1+2 (R2+R3Rx/ (R3+Rx))]; Hummer LS1 sends the sound of certain frequency equally, and now, by the sound frequency comparison between sound and K1-K6, sound is close, and close the connected resistance of this measured resistance Rx and sound is close, completes the estimation of measured resistance.Based on this kind of mode, can estimate very fast resistance value, solved the low and testing cost high problem of detection efficiency that resistance needs multimeter to bring that detects.
Based on technique scheme, described circuit board can also comprise digital display counting device, and output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device.By digital display counting device, record the flat crest of height of the resonant circuit output that 555 timers form, can visually understand like this frequency of the voice signal of corresponding hummer output, from another side, verify the accuracy of above-mentioned testing result.
Based on technique scheme, above-mentioned gating switch K is single pole multiple throw, described single pole multiple throw singly enter the contact that intermediate node that end connects described the 3rd resistance R 3 and the second resistance R 2 is drawn, described single pole multiple throw have more the other end that end connects respectively described a plurality of measuring resistances.
Based on above-mentioned control circuit, the present invention also provides a kind of device of estimating resistance, it comprises: a worktable, on described worktable, be provided with a plurality of measuring resistances access seat and for the direct current source(-)holder of accommodating direct supply BT1, described worktable is embedded in control circuit board, is provided with 555 timers, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first capacitor C 1, the second capacitor C 2 and hummer on described control circuit board, discharge end 7 pin of described 555 timer IC1 connect the positive pole of described direct current source(-)holder by the first resistance R 1, low triggering end 2 pin of described 555 timer IC1 are connected discharge end 7 pin of described 555 timer IC1 successively with the second resistance R 2 by described the 3rd resistance R 3, the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 and low triggering end 2 pin of described 555 timer IC1 are drawn respectively two contacts for being connected the two ends of testing resistance, high-triggering end 6 pin of described 555 timer IC1 directly connect low triggering end 2 pin of described 555 timer IC1, and the negative pole of 1 pin and described direct current source(-)holder is held on the ground that also connects described 555 timer IC1 by described the first capacitor C 1, output terminal 3 pin of described 555 timer IC1 connect one end of described hummer by the second capacitor C 2, the other end of described hummer is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct current source(-)holder, described 555 timer IC1, a contact of drawing from low triggering end 2 pin of described 555 timer IC1 is also connected with one end of described a plurality of measuring resistance access seats respectively, described measuring resistance access seat is for inserting a plurality of standard detection resistance in the loop that is electrically connected to described control circuit board, between the contact that the other end of described a plurality of measuring resistance access seats and the intermediate node of described the 3rd resistance R 3 and the second resistance R 2 are drawn, gating switch K is set, for selectivity, be electrically connected to one end Kx of testing resistance Rx, the other end (the K1 of a plurality of measuring resistance access seats, ...) in arbitrary one end and the intermediate node of described the 3rd resistance R 3 and the second resistance R 2.
Based on technique scheme, on above-mentioned control circuit board, be also provided with digital display counting device, output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device, and the display screen of described digital display counting device exposes to described worktable surface.By digital display counting device, record the flat crest of height of the resonant circuit output that 555 timers form, can visually understand like this frequency of the voice signal of corresponding hummer output, from another side, verify the accuracy of above-mentioned testing result.
Based on technique scheme, the resistance of above-mentioned a plurality of standard detection resistance increases successively.
Based on technique scheme, gating switch K on described control circuit board is single pole multiple throw, the contact that the intermediate node that singly enters end described the 3rd resistance R 3 of connection and the second resistance R 2 of described single pole multiple throw is drawn, the end that has more of described single pole multiple throw connects respectively the other end that described a plurality of measuring resistance accesses seat.
In addition, can also power switch be set on work top based on technique scheme, described power switch is connected in the circuit loop of above-mentioned control circuit board.
The detection method of said apparatus and principle, referring to the explanation of above-mentioned most preferred embodiment, are not done tired stating at this.And, for the ease of a plurality of measuring resistances, can conveniently replace, the corresponding upper measuring resistance of measuring resistance access seat is linked in access seat by inserting mode, is convenient for changing, so that the adaptive more testing resistance of device, in order to adapt to more detection occasions.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a device of estimating resistance, it is characterized in that, comprise: a worktable, on described worktable, be provided with a plurality of measuring resistances access seat and for the direct current source(-)holder of accommodating direct supply, described worktable is embedded in control circuit board, is provided with 555 timers, the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and hummer on described control circuit board; Discharge end 7 pin of described 555 timers connect the positive pole of described direct current source(-)holder by the first resistance, low triggering end 2 pin of described 555 timers are connected discharge end 7 pin of described 555 timers successively with the second resistance by described the 3rd resistance, the intermediate node of described the 3rd resistance and the second resistance and low triggering end 2 pin of described 555 timers are drawn respectively two contacts for being connected the two ends of testing resistance; High-triggering end 6 pin of described 555 timers directly connect low triggering end 2 pin of described 555 timers, and the negative pole of 1 pin and described direct current source(-)holder is held on the ground that connects described 555 timers by described the first electric capacity, output terminal 3 pin of described 555 timers connect one end of described hummer by the second electric capacity, the other end of described hummer is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct current source(-)holder, described 555 timers;
A contact of drawing from low triggering end 2 pin of described 555 timers is also connected with one end of described a plurality of measuring resistance access seats respectively, between the contact that the other end of described a plurality of measuring resistance access seats and the intermediate node of described the 3rd resistance and the second resistance are drawn, gating switch is set, for selectivity, is electrically connected to arbitrary one end of the other end and the intermediate node of described the 3rd resistance and the second resistance of one end of testing resistance, the arbitrary access seat of a plurality of measuring resistance access seat.
2. the device of estimation resistance as claimed in claim 1, it is characterized in that, on described control circuit board, be also provided with digital display counting device, output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device, and the display screen of described digital display counting device exposes to described worktable surface.
3. the device of estimation resistance as claimed in claim 1, is characterized in that, the resistance of described a plurality of standard detection resistance increases successively.
4. the device of estimation resistance as claimed in claim 1, it is characterized in that, gating switch on described control circuit board is single pole multiple throw, the contact that the intermediate node that singly enters end described the 3rd resistance of connection and the second resistance of described single pole multiple throw is drawn, the end that has more of described single pole multiple throw connects respectively the other end that described a plurality of measuring resistance accesses seat.
5. a control circuit of estimating resistance, is characterized in that, described circuit comprises a plurality of measuring resistances, 555 timers, the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity, hummer and direct supply; Discharge end 7 pin of described 555 timers connect the positive pole of described direct supply by the first resistance, low triggering end 2 pin of described 555 timers are connected discharge end 7 pin of described 555 timers successively with the second resistance by described the 3rd resistance, the intermediate node of described the 3rd resistance and the second resistance and low triggering end 2 pin of described 555 timers are drawn respectively two contacts for being connected the two ends of testing resistance; High-triggering end 6 pin of described 555 timers directly connect low triggering end 2 pin of described 555 timers, and the negative pole of 1 pin and described direct supply is held on the ground that connects described 555 timers by described the first electric capacity, output terminal 3 pin of described 555 timers connect one end of described hummer by the second electric capacity, the other end of described hummer is connected with zero suppression end 4 pin with power end 8 pin of the positive pole of described direct supply, described 555 timers;
A contact of drawing from low triggering end 2 pin of described 555 timers is also connected with one end of described a plurality of measuring resistances respectively, between the contact that the intermediate node of the other end of described a plurality of measuring resistances and described the 3rd resistance and the second resistance is drawn, gating switch is set, for selectivity, is electrically connected to the intermediate node of one end of testing resistance, arbitrary one end of the other end of a plurality of measuring resistances and described the 3rd resistance and the second resistance.
6. the control circuit of estimation resistance as claimed in claim 5, is characterized in that, described circuit board also comprises digital display counting device, and output terminal 3 pin of described 555 timers connect the counting input end of described digital display counting device.
7. the control circuit of estimation resistance as claimed in claim 5, is characterized in that, the resistance of described a plurality of standard detection resistance increases successively.
8. the control circuit of estimation resistance as claimed in claim 5, it is characterized in that, described gating switch is single pole multiple throw, described single pole multiple throw singly enter the contact that intermediate node that end connects described the 3rd resistance and the second resistance is drawn, described single pole multiple throw have more the other end that end connects respectively described a plurality of measuring resistances.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310170105.7A CN104142429A (en) | 2013-05-09 | 2013-05-09 | Resistor resistance value estimating device and control circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310170105.7A CN104142429A (en) | 2013-05-09 | 2013-05-09 | Resistor resistance value estimating device and control circuit thereof |
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| CN201310170105.7A Pending CN104142429A (en) | 2013-05-09 | 2013-05-09 | Resistor resistance value estimating device and control circuit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707027A (en) * | 2017-03-30 | 2017-05-24 | 漳州市东方智能仪表有限公司 | Wide-range and high-resistance test circuit and method |
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Application publication date: 20141112 |