CN2535809Y - SOH2 Power frequency electric-field wireless teledetection instrument - Google Patents

Abstract

A 50 Hz industrial frequency electric field wireless remote-indicating instrument is a transmission-reception type industrial frequency electric field wireless remote-indicating instrument which is formed through the combination of non-contact electric field monitoring and radio telemetry on the basis of electric field sensing principle, thereby the short-distance observation of 50 Hz industrial frequency electric field detecting data is realized. The utility model is designed by adopting elements as an analog integrated circuit, a digital integrated circuit and the like, and the intensity of a 50 Hz industrial frequency electric field is displayed by using liquid crystal digit. The utility model has the advantages of high accuracy, small volume, light weight, convenient carrying, digital display, easy observation, non-contact suspending measure, hand-held detection, stable frequency wireless transmission, omnibearing reception and the like. The utility model is adapted for the accuracy measure of the spatial distributions of 50 Hz industrial frequency electric fields in electrical power systems, converting stations, electric power plants and electric management departments.

Description

50HZ power frequency electric field wireless telemetering instrument

Affiliated technical field

The utility model belongs to the measurement mechanism of wireless telemetering 50HZ power-frequency electric field strength.

Background technology

50HZ power frequency transmission line of electricity provides power source for all trades and professions, exists the 50HZ alternating electric field at the transmission line of electricity surrounding space simultaneously.Now, the untouchable electrical verification instrument that people use, (this patented technology is invented by the utility model deviser as " Safety helmet with an electric alarm means ", the patent No.: 86102149.5) and " intelligent electrician cap " (this patented technology is also invented by the utility model deviser, the patent No.: 97204156.7) etc., they can only qualitative detection 50HZ power frequency electric field existence, and numerical value that can not quantitative measurement 50HZ power-frequency electric field strength.Another patented technology that the utility model deviser has declared " 50HZ power frequency electric field field intensity meter " (application number: 00262814.7), though it can accurately measure 50HZ power frequency electric field field intensity in spatial distributions, but it shows the LCD panel of measurement data, sighting distance from the operator is far away, be subjected to the influence of ambient light power when detecting in addition, therefore the operator is very inconvenient to the observation of measurement data, and these shortcomings have reduced the Practical Performance of " 50HZ power frequency electric field field intensity meter ".

Summary of the invention

In order to overcome the shortcoming that " 50HZ power frequency electric field field intensity meter " measurement data is not easy to observe, the utility model provides a kind of " 50HZ power frequency electric field wireless telemetering instrument ", this device detects untouchable electric field and combines with wireless telemetry technique, constitute emission---receiving type " 50HZ power frequency electric field wireless telemetering instrument ", it with the measurement data of 50HZ power frequency electric field field intensity after wireless transmit, the receiving circuit box of being handed by the operator shows, thereby realized the close-ups of field strength measured data, so help improving the efficient of surveying work.

50HZ power frequency electric field wireless telemetering instrument measures transmitter by the 50HZ power frequency electric field and receiving circuit box two parts are formed, and measuring transmitter is to have the measurement radiating circuit box and the insulation rod of electronic circuit to combine by 50HZ power frequency electric field sensor, interior arrangement; The receiving circuit box is by receiving antenna and place the electronic circuit in the box to be formed.50HZ power frequency electric field sensor is attached to the both sides of measuring the radiating circuit box, and be connected with circuit in insulated conductor and the box, measure electronic circuit in the radiating circuit box and be by be installed in measuring amplifier, range selector, sign-changing amplifier on the same printed circuit board, amplifier, frequency modulator, concealed antenna formula frequency stabilization transmitter module and several partial circuits of dual power supply generator are linked in sequence and form in the same way.Electronic circuit in the receiving circuit box is to be linked in sequence and to form by being installed in frequency stabilization receiver module, frequency demodulator, second-order low-pass filter, sign-changing amplifier, AC-DC AC/DC changeover switch, double integration A/D analog to digital converter, LCD LCD and several partial circuits of dual power supply generator on the same printed circuit board.The utility model adopts two attached to measuring radiating circuit box sheet metal formation both sides, parallel to each other plane-parallel capacitor, and this plane-parallel capacitor is exactly a 50HZ power frequency electric field sensor.For the volume that reduces receiving test circuit with simplify circuit double integration A/D analog to digital converter and LCD LCD, directly the liquid crystal digital panel of Cai Yonging are installed.The hand-held insulation rod afterbody of measuring transmitter of operator, and the hand-held receiving circuit box of another just can carry out the untouchable detection that suspends of 50HZ power frequency electric field space field strength distribution, liquid crystal display displays goes out the data of field intensity to be measured, for operator's close-ups.

The beneficial effects of the utility model are: for the measurement of 50HZ power frequency electric field has increased the wireless telemetering function, realized the close-ups of 50HZ power frequency electric field field intensity data, and carry out the 50HZ power frequency electric field when measuring, the receiving circuit box not the recipient to the influence of position, be suitable for various complicated transmission of electricity environment and use.In addition, the utility model also can be used as the fixed point monitoring use of strange land 50HZ power frequency electric field.

Description of drawings

Fig. 1 is that the 50HZ power frequency electric field is measured the transmitter synoptic diagram.

Fig. 2 is a receiving circuit box synoptic diagram.

Fig. 3 measures radiating circuit figure.

Fig. 4 is receiving circuit figure.

Embodiment

The utility model measures transmitter by the 50HZ power frequency electric field and receiving circuit box two parts are formed.Measure in the transmitter synoptic diagram at 50HZ power frequency electric field shown in Figure 1, circuit box is the ambroin shell, and support by insulation rod, upper and lower sheet metal attached to the circuit box both sides constitutes plane-parallel capacitor, this plane-parallel capacitor is exactly a 50HZ power frequency electric field sensor, and is connected with electronic circuit in the box with insulated conductor; Because of electronic circuit in the box is to measure radiating circuit, so this circuit box is referred to as to measure the radiating circuit box again.Measure radiating circuit as shown in Figure 3.It is to be linked in sequence and to form by being installed in measuring amplifier IC1, range selector K2, sign-changing amplifier IC2a, in-phase amplifier IC2b, frequency modulator IC3, concealed antenna formula frequency stabilization 315MHZ transmitter module T931 and a few part built-up circuits of dual power supply generator IC2c on the same printed circuit board; Parallel plate capacitor sensor s is the input information source of this measurement radiating circuit.Receiving circuit box shown in Figure 2 is made up of receiving antenna and the inner circuit box that receiving circuit is housed, and is provided with a liquid crystal digital display window on the box surface.Receiving circuit as shown in Figure 4.It is to be linked in sequence and to form by being installed in frequency stabilization receiver module T932, frequency demodulator IC1, second-order low-pass filter IC2a, sign-changing amplifier IC2b, AC-DC AC/DC changeover switch IC2c, double integration A/D analog to digital converter, LCD LCD and several partial circuits of dual power supply generator IC2d on the same printed circuit board.In order to reduce the volume of receiving test circuit, simplify circuit and install, double integration A/D analog to digital converter and LCD LCD directly adopt digitizing tablet UP316A-1.

The course of work of the present utility model: in 50HZ power frequency alternating electric field, parallel plate capacitor sensor s (see figure 3) respond to the 50HZ alternating signal, via L1, C1 and L2, behind the high-frequency filter circuit that C2 forms, transport to measuring amplifier IC1 (AD620), signal after IC1 amplifies is via R4, R5, the sign-changing amplifier that C3 and integrated transporting discharging IC2a form, transport to again by R6 through coupling capacitance C4 and signal intensity regulator potentiometer W then, R7, the amplifier in the same way that C5 and integrated transporting discharging IC2b form, the 50HZ power frequency sinusoidal ac signal of IC2b output is transported to by R8 through coupling capacitance C6, R9, R10, the frequency modulator that C7 and digital integrated chip IC 3 (4046) are formed, the different centre frequencies that just can change frequency modulator of the value of C7 and R10, by the frequency modulation rectangular pulse signal that 4 pin of IC3 are exported, just energy keying high-frequency emission module T931 is to spatial emission 315MHZ frequency electromagnetic waves.Power supply E is the 9v laminated cell among Fig. 3, and this power supply is converted to the symmetric double power supply after K switch 1, and this is because integrated chip IC2c is connected to follower, because R11=R12, so can provide bipolarity symmetry power supply ± B to whole measurement radiating circuit.Measure in the radiating circuit, IC2a, IC2b, IC2c are four high guaily unit integrated chip TL084.The receiving antenna TX of receiving circuit (see figure 4), in case receive by warbled 315MHZ high-frequency emission signal, receiver module T932 (it is the supporting receiving unit with the T931 transmitter module) just can demodulate frequency modulated signal, and this FM signal is transported to the frequency demodulation circuit of being made up of R2, C2, C4, R3, R4 and digital integrated chip IC 1 (4046) through coupling capacitance C3.The value of C4 and R4 is different, just can change this demodulator circuit centre frequency.By the 50HZ power frequency sinusoidal ac signal after the 10 pin output frequency demodulation of IC1, be passed to by R5 through coupling capacitance C5, R6, C6, the second-order low-pass filter circuit that C7 and integrated transporting discharging IC2a form, filtering residual frequency modulation signal, transport to by R7 through capacitor C 8 then, R8, the sign-changing amplifier that C9 and integrated transporting discharging IC2b form, signal after the amplification is transported to by R9 through coupling capacitance C10 and calibration potentiometer W1, R10, R11, C11, C12, C13, C14, C16, D2, D3, the AC-DC ac-dc converter circuit that integrated transporting discharging IC2c and zero potentiometer W2 form, the direct current signal of its output, via R12, the filtering smoothing circuit that C15 forms is transported to the input end IN of digitizing tablet PU316A-1, thereby demonstrates the electric field intensity of the 50HZ power frequency electric field of measuring transmitter position point.Power supply E is the 9V laminated cell among Fig. 4, and this power supply is converted to bipolar power supply through K switch, and this is because IC2d is connected to follower, and R13=R14, so output bipolarity symmetry power supply ± B.The 5V stabilized voltage supply that resistance R 1,5V stabilivolt D1 and capacitor C 1 are formed is to receiver module T932 power supply, and integrated chip IC2a, IC2b, IC2c, IC2d are four high guaily unit TL084.Must be pointed out, measuring amplifier IC1 selects for use amplifier AD620 to be because it has the high input impedance of high precision and symmetry among Fig. 3, and only need change the resistance of outer meeting resistance, just can change its gain amplifier, so simplified input sensing circuit and selective circuit of measuring range greatly.Selective circuit of measuring range is made up of selector switch K2 and resistance R 1, R2, R3, and range switch K2 is divided into 1,2,3 grade, in order to change the gain amplifier of metering circuit, makes it to meet the measurement of high-low pressure power frequency electric field.The using method of zero potentiometer W2 and calibration potentiometer W1 among Fig. 4: when the short circuit of sheet metal up and down of parallel plate capacitor sensor s among Fig. 3, adjust W2 and make digitizing tablet be shown as 0; When the utility model is in the standard electric field, adjust W1 and make it shown digit standardization value.

Claims (6)

1, a kind of 50HZ power frequency electric field wireless telemetering instrument, it measures transmitter by the 50HZ power frequency electric field and receiving circuit box two parts are formed, and measuring transmitter is to have the measurement radiating circuit box and the insulation rod of electronic circuit to combine by 50HZ power frequency electric field sensor, interior arrangement; The receiving circuit box is by receiving antenna and place the electronic circuit in the box to be formed; It is characterized in that: 50HZ power frequency electric field sensor is attached to the both sides of measuring the radiating circuit box, and is connected with circuit in insulated conductor and the box; Measure electronic circuit in the radiating circuit box and be by be installed in measuring amplifier, range selector, sign-changing amplifier on the same printed circuit board, amplifier, frequency modulator, concealed antenna formula frequency stabilization transmitter module and several partial circuits of dual power supply generator are linked in sequence and form in the same way; Electronic circuit in the receiving circuit box is to be linked in sequence and to form by being installed in frequency stabilization receiver module, frequency demodulator, second-order low-pass filter, sign-changing amplifier, AC-DC AC/DC changeover switch, double integration A/D analog to digital converter, LCD LCD and several partial circuits of dual power supply generator on the same printed circuit board.

2,50HZ power frequency electric field telegauge according to claim 1, the said electric-field sensor of its feature are the plane-parallel capacitors of making of two sheet metals.

3,50HZ power frequency electric field telegauge according to claim 1, the said measuring amplifier of its feature, sign-changing amplifier, the Analogous Integrated Electronic Circuits chip that is to use of amplifier, second-order low-pass filter, AC-DC AC/DC changeover switch and dual power supply generator in the same way.

4,50HZ power frequency electric field telegauge according to claim 1, the CMOS integrated circuit (IC) chip of the model of the same race that the said frequency modulator of its feature, frequency demodulator are to use.

5,50HZ power frequency electric field telegauge according to claim 1, the three and half liquid crystal digital panels that the said double integration A/D analog to digital converter of its feature, LCD LCD are to use.

6,50HZ power frequency electric field telegauge according to claim 1, the said concealed antenna formula of its feature frequency stabilization transmitter module and frequency stabilization receiver module are supporting wireless transmit---receive the finished product assembly.

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