CN1057539A - Pulse width measuring method by serial output resistance method - Google Patents
Pulse width measuring method by serial output resistance method Download PDFInfo
- Publication number
- CN1057539A CN1057539A CN 91104995 CN91104995A CN1057539A CN 1057539 A CN1057539 A CN 1057539A CN 91104995 CN91104995 CN 91104995 CN 91104995 A CN91104995 A CN 91104995A CN 1057539 A CN1057539 A CN 1057539A
- Authority
- CN
- China
- Prior art keywords
- pulse
- resistance
- width
- data
- measured resistance
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 230000003534 oscillatory effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention relates to a pulse width measuring method by a serial output resistance method. The method is characterized in that a tested resistor is switched by an analog multi-way switch in sequence and is superposed with a charging resistor of an RC oscillating circuit, the RC oscillating circuit outputs an electric pulse with the width proportional to the value of the tested resistor and converts the electric pulse into a data pulse train with the corresponding width, a mark pulse is arranged in the pulse train to identify a starting point, a standard precision resistor and a zero resistor are connected to a data input end of the analog multi-way switch and are used for providing a measurement reference value and an additional resistor of the measurement circuit, and thus the value of the tested resistor can be changed into [ by the formula RXX-WL)·RJ]/(WJ-WI) And (4) calculating.
Description
The present invention relates to a kind of method of utilizing measured resistance value to carry out DATA REASONING, sampling and remote serial transfer, refer more particularly to a kind of measuring method of pulse width with serial output resistance method.
In order to measure, gather the various parameters in the production runes such as a large amount of temperature, humidity, pressure, brightness, often these non electrical quantities are converted to the variation of resistance value by semiconductor element, calculate non-electrical quantity by measured resistance value then.Usually, for measured resistance value then is converted to voltage or current signal to resistance, is converted to digital quantity through A/D again and gives Computer Processing or show.The also available method that converts resistance value to pulse signal is measured.These methods and present known measurement mechanism all are subjected to the restriction of external condition (temperature, supply voltage, line component parameter etc.) to some extent, cause measuring accuracy not high, simultaneously, when measurement point increases, measuring equipment is also wanted corresponding increase, the transmission lines complexity, disturbing increases, and operational reliability is descended.
In order to improve the anti-interference of measuring circuit, United States Patent (USP) 4513403 has proposed a kind of " digital coding of pulse remote measurement and synchronization " method and circuit, its output waveform is as shown in Figure 1.As shown in Figure 1, this method be the data that will measure be placed on the synchronization pulse and at interval in transmit, form the digital coding spike train, in the data that transmitted, add redundant pulse simultaneously, the antijamming capability when improving data and transmitting.This method has the advantage of identification data-signal from the noise that transmission lines self produces, but do not solve the problem that improves the DATA REASONING precision, do not solve when measuring and transmit data yet, circuit external cause (as temperature, mains fluctuations etc.) disturbs the problem that causes error, simultaneously, it is more to use the device line link that this method makes, and cost is higher.
Task of the present invention provides a kind of measuring method of pulse width with serial output resistance method, to improve the anti-interference problem in DATA REASONING precision and the solution data transmission procedure.
Solution of the present invention is as follows: Fig. 2 is an output waveform figure of the present invention, and Fig. 3 is a schematic circuit of the present invention.By shown in Figure 3, switch measured resistance in proper order with simulating multi-way switch, make the charging resistor R of capacitor C 1 in itself and the RC oscillatory circuit
FStack, the pulse of the corresponding measured resistance of width of oscillator output at this moment, and the back edge of this pulse makes rolling counters forward, the output of counter is as the gating signal that simulates multi-way switch, repeat said process, then oscillator is exported a string width spike train corresponding with each measured resistance.At the input end that simulates multi-way switch except that by having the measured resistance, also fixing precision resistance and zero resistance that inserts a standard resistance, the pulse of a respectively corresponding respective width in the output spike train, when mains fluctuations or circuit parameter variations, the pulse width of precision resistance correspondence also will change, this just provides reference point to data computation, eliminated of the influence of external interference factor to the data measuring accuracy, additional resistance for circuit itself changes, then detect by the respective pulses width of zero resistance in the output spike train, and deducted in the computing method of introducing in the back, thereby eliminated the influence of the interference of circuit self, improved the precision of DATA REASONING thus the data measuring accuracy.As shown in Figure 2, for the circulation that guarantees the output spike train sends, in the spike train of measured resistance correspondence, be provided with a mark pulse, show that a data set measurement finishes, begin next cyclic process,, will deliver in the computing machine with formula RX=((W by the data pulse row of oscillator output
X-W
L) R
J)/(W
J-W
L) calculate R in the formula
JBe the precision resistance value; Rx is the measured resistance value; W
LPulse width for zero resistance correspondence in spike train; W
JPulse width for precision resistance correspondence in spike train; W
XPulse width for measured resistance correspondence in spike train.Then obtain the exact value of measured resistance, finish the task of DATA REASONING.
The circuit that adopts the method for the invention design as shown in Figure 3, this circuit only can be finished by several commercially available integrated circuit, circuit is simple, and is with low cost, not only improved antijamming capability and measuring accuracy, and easy to utilize.
Fig. 3 has represented one embodiment of the present of invention, and it is by analog multichannel switch (1), code translator (2), counter (3), delay circuit (5), (6), time base circuit (4) and discharge resistance R
FWith the oscillator that capacitor C 1 constitutes, measured resistance (7), precision resistance R
J, zero resistance RO forms.After the circuit energized, the output signal of counter (3) is delivered to the input end of analog multichannel switch (1) through code translator (2), makes working power by power Vcc
2Through current-limiting resistance R
H, measured resistance (7), the resistance R of the public output of analog multichannel switch (1)
FTo capacitor C 1 charging, make the pulse of the oscillatory circuit measured resistance of forming by time base circuit (4) of correspondence of output (7), the hut pulse can be imported computing machine and carry out data processing, and the back of this pulse given counter (3) along loopback, makes counter (3) output add " 1 ", analog multichannel switch (1) switches to the next passage of measuring, circulation successively, capacitor C 1 are charged to and begin discharge behind the setting, and its, length just determined the recurrent interval discharge time.
When measured resistance (7) not during place in circuit, when being measured resistance value infinity, 1 duration of charging of capacitor C is very long, and delay circuit this moment (5) is according to the time action of adjusting in advance, substitute original charge circuit, make the pulse W ∞ of a fixed width of time base circuit (4) output.
After all measured resistance all circulate measurement, counter (3) carry, delay circuit (5) is blocked in its output, and because of there not being tested passage to connect, 1 duration of charging of capacitor C is very long like this, then delay circuit (6) is by the time action of adjusting in advance, its output makes counter (3) clear " 0 ", shows a loop ends, and beginning is circulation next time, at this moment, the next mark pulse W of time base circuit (4) output
H, its width generally when adjusting circuit, makes W greater than W ∞
H＞1.3W ∞ gets final product.
In order to improve the anti-interference of measuring accuracy and circuit, with a precision resistance R
JInsert the input end of analog multichannel switch with a short circuit zero resistance RO and measured resistance (7), after a complete measuring process finishes, just can obtain the oscillogram of output data spike train as shown in Figure 2 like this.
After DATA REASONING is finished, then can be according to formula RX=(W
X' R
J)/(W '
J) in computing machine, calculate each measured resistance value, in the formula: W
LBe the corresponding width of zero resistance in spike train; R
JBe the precision resistance value; W'
X=W
X-W
LBe the respective pulses width of measured resistance value in spike train; W'
J=W
J-W
LBe the respective pulses width of precision resistance value in spike train.
Adopt the DATA REASONING of the method for the invention and used equipment, have following advantage and good effect:
The data pulse of 1, measuring row is classified automatic circulation serial as and is sent, and does not need to add in addition addressing and enabling signal, and remote transmission need only two signal lines, and cost reduces greatly.
2, provide the measurement reference point, and eliminated the impact that measurement and transmission lines additional resistance disturb with the mode of zero resistance, certainty of measurement and anti-interference are increased.
3, provide simple method, i.e. RX=((W perhaps
X-W
L) R
J)/(W
J-W
L).
4, because circuit of the present invention only is made of several commercially available integrated circuit connections, apply in the production run of being more convenient for, economic benefit is considerable.
Claims (1)
1, a kind of measuring method of pulse width with serial output resistance method is characterized in that:
A. switch measured resistance with the analog multichannel switch order, make the charging resistor stack of itself and RC oscillatory circuit, make width of RC oscillatory circuit output and measured resistance be worth proportional pulse, the output signal of this pulse after rolling counters forward be the measurement passage of gating analog multichannel switch successively, a plurality of measured resistance values are converted to the data pulse row of corresponding width, Automatic Cycle, serial output
B. be provided with the starting point that a mark pulse comes the identification pulse row in the data pulse of the described output row,
C. at the data input pin of analog multichannel switch except that being connected to measured resistance, also be connected to a universal standard precision resistance, the measurement reference point is provided,
D. the data input pin of analog multichannel switch also is connected to a zero resistance, is used for detecting the additional resistance of measurement itself,
E. the measured resistance value is with formula RX=((W
X-W
L) R
J)/(W
J-W
L) calculate, in the formula:
R is the precision resistance value in the formula, R
xBe measured resistance value, W
LBe zero resistance corresponding pulse width in the data pulse row, W
JBe precision resistance corresponding pulse width in the data pulse row, W
xBe each measured resistance corresponding pulse width in the data pulse row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104995 CN1025466C (en) | 1991-07-25 | 1991-07-25 | Pulse width measuring method by serial output resistance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104995 CN1025466C (en) | 1991-07-25 | 1991-07-25 | Pulse width measuring method by serial output resistance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057539A true CN1057539A (en) | 1992-01-01 |
| CN1025466C CN1025466C (en) | 1994-07-13 |
Family
ID=4906927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91104995 Expired - Fee Related CN1025466C (en) | 1991-07-25 | 1991-07-25 | Pulse width measuring method by serial output resistance method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025466C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957141A (en) * | 2018-07-27 | 2018-12-07 | 北京新能源汽车股份有限公司 | Resistance detection device, charger and electric automobile who confirms CC end are connected |
| CN115380418A (en) * | 2020-04-01 | 2022-11-22 | 松下知识产权经营株式会社 | Power storage pack, electric mobile body, and charging device |
-
1991
- 1991-07-25 CN CN 91104995 patent/CN1025466C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957141A (en) * | 2018-07-27 | 2018-12-07 | 北京新能源汽车股份有限公司 | Resistance detection device, charger and electric automobile who confirms CC end are connected |
| CN108957141B (en) * | 2018-07-27 | 2021-04-06 | 北京新能源汽车股份有限公司 | Resistance detection device, charger and electric automobile who confirms CC end are connected |
| CN115380418A (en) * | 2020-04-01 | 2022-11-22 | 松下知识产权经营株式会社 | Power storage pack, electric mobile body, and charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025466C (en) | 1994-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7282927B1 (en) | Use of a configurable electronic controller for capacitance measurements and cable break detection | |
| US8049488B2 (en) | Electrical power metering device and method of operation thereof | |
| WO1993006499A1 (en) | Improvements relating to the calibration of power meters | |
| US5007042A (en) | Method and apparatus for transmitting analog data embedded in a digital pulse train | |
| CN108120919A (en) | A kind of integrated circuit time parameter test circuit and method | |
| US4864274A (en) | Remote reading thermostat | |
| CN1025466C (en) | Pulse width measuring method by serial output resistance method | |
| CN1023427C (en) | Broad-band frequency measuring method with phase detection and high-precision frequency meter | |
| US4361838A (en) | Remote meter reading arrangement | |
| EP0277638A2 (en) | Successive period-to-voltage converting apparatus | |
| US4418250A (en) | Telephone cable splicers test set and method of testing | |
| US4429271A (en) | Digital capacitance measuring test set and test circuit incorporated therein | |
| CN112782635B (en) | Winding wire breakdown voltage tester calibrating device | |
| US4405990A (en) | Apparatus for determining the ratio of two signal repetition rates | |
| JPS6233393Y2 (en) | ||
| RU2208805C2 (en) | Device measuring electric capacitance and/or resistance | |
| SU1245753A1 (en) | Device for diagnostics of borehole sucker-rod pumps | |
| JP3310367B2 (en) | Light intensity detection circuit | |
| CN1242513A (en) | Process control machine pulsed insertion plate | |
| SU1137409A1 (en) | Digital resistance meter | |
| SU1215043A1 (en) | Meter of frequency-time parameters of electric signals | |
| SU1305878A1 (en) | Device for testing regenerators of digital communication systems | |
| JP2573226B2 (en) | Signal time measurement device | |
| SU1441338A1 (en) | Device for monitoring the performance of shapers of main color signals of television receivers | |
| SU892413A2 (en) | Meter of intervals between pulse centers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |