CN211905708U - Double-counting-tube sampling circuit - Google Patents
Double-counting-tube sampling circuit Download PDFInfo
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- CN211905708U CN211905708U CN202020638806.4U CN202020638806U CN211905708U CN 211905708 U CN211905708 U CN 211905708U CN 202020638806 U CN202020638806 U CN 202020638806U CN 211905708 U CN211905708 U CN 211905708U
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- power supply
- counting tube
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Abstract
The utility model discloses a double-counting tube sampling circuit, which solves the technical problem of larger circuit volume in the prior art, comprises a low-range counting tube, a high-range counting tube, a single chip microcomputer and a power supply, and also comprises a voltage supply sampling integrated module integrated with a double-circuit high-voltage power supply circuit and a double-circuit sampling circuit; the voltage supply sampling integrated module can boost the power supply voltage and then provide the boosted power supply voltage for the low-range counting tube and the high-range counting tube; the low-range counting tube is connected with a first power supply loop of the voltage supply sampling integrated module through a switch circuit, and the switch circuit is switched on and off by receiving a control signal of the singlechip; the high-range counting tube is directly connected to a second power supply loop of the voltage supply sampling integrated module; pulse signals output by the low-range counting tube and the high-range counting tube are converted into square wave signals through the pressure supply sampling integrated module and are sent to the single chip microcomputer.
Description
Technical Field
The utility model relates to a nuclear radiation measurement technical field.
Background
The counting tube is also called a nuclear radiation counter, and is an electronic device for converting incident particles or rays into electric pulses, and is of various types, such as a proportional counting tube, a geiger-miller counting tube and the like. The counting tube needs a high-voltage power supply to drive, pulse signals output by the counting tube need a corresponding sampling circuit to convert square wave signals, and the square wave signals are input to the single chip microcomputer to count radiation dose rate measurement values.
Each counting tube needs a corresponding high-voltage circuit and a sampling circuit. In order to widen the measurement range, two counting tubes with different measurement ranges are generally adopted for matching, so that two sets of high-voltage circuits and sampling circuits are needed, and the circuit is complex, high in power consumption, large in size and high in cost. In addition, two sets of switch circuits are needed to respectively switch the two counting tubes, so that the problems of high power consumption, large size and the like of the circuit are further caused.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned technique, the utility model provides a two count pipe sampling circuit solves the great technical problem of circuit volume among the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows: a double-counting tube sampling circuit comprises a low-range counting tube, a high-range counting tube, a single chip microcomputer, a power supply and a voltage supply sampling integrated module integrated with a double-circuit high-voltage power supply circuit and a double-circuit sampling circuit; the voltage supply sampling integrated module can boost the power supply voltage and then provide the boosted power supply voltage for the low-range counting tube and the high-range counting tube; the low-range counting tube is connected with a first power supply loop of the voltage supply sampling integrated module through a switch circuit, and the switch circuit is switched on and off by receiving a control signal of the singlechip; the high-range counting tube is directly connected to a second power supply loop of the voltage supply sampling integrated module; pulse signals output by the low-range counting tube and the high-range counting tube are converted into square wave signals through the pressure supply sampling integrated module and are sent to the single chip microcomputer.
Furthermore, the measuring range of the low-range counting tube is partially overlapped with the measuring range of the high-range counting tube, and the value in the overlapped area is used as a threshold value; the single chip microcomputer generates a control signal for controlling the switch circuit by comparing the threshold value with the real-time measurement value corresponding to the low-range counting tube or the high-range counting tube.
Furthermore, the switch circuit comprises an electromagnetic relay and a triode, and a contact switch of the electromagnetic relay is connected in series to a first power supply loop of the voltage supply sampling integrated module; one end of an electromagnet of the electromagnetic relay is connected with a power supply, and the other end of the electromagnet is grounded through a triode; the collector of the triode is connected with the electromagnet, the emitter of the triode is grounded, and the base of the triode is connected with the singlechip; the triode receives a control signal of the singlechip to conduct or shut off, so that the electromagnet is electrified or powered off to change the attraction state between the electromagnet and the contact switch, and the on-off of the first power supply loop is switched.
Furthermore, the low-range counting tube and the high-range counting tube are G-M counting tubes.
Compared with the prior art, the utility model has the advantages of include:
1. the utility model discloses a supply to press sampling collection moulding piece to realize that two count pipes share same module and carry out high voltage power supply and sampling, adopt two sets of high-voltage circuit and sampling circuit to compare among the prior art, reduced the volume greatly. And, integrate the pressure supply circuit and sampling circuit in the same module, make the volume reduce too. In addition, only the low-range counting tube is subjected to on-off control, and compared with the prior art that a double-way switch circuit is adopted for switching, the volume occupied by the switch circuit is reduced. Finally, the whole volume of the circuit is obviously reduced.
2. The measuring range of the low-range counting tube is partially overlapped with that of the high-range counting tube, so that after the low-range counting tube is turned off, the high-range counting tube can still be used for measuring the partial small-measurement radiation metering rate.
3. The value in the overlapping area is used as a threshold value, so that the low-range counting tube can be protected, and the low-range counting tube is prevented from measuring the radiation dose rate exceeding the upper limit of the self-measuring range.
4. The switching circuit composed of the triode and the electromagnetic relay can meet the requirement of turning off high voltage and avoid the breakdown of the triode directly connected into the high voltage circuit.
5. The G-M counter tube is also called a Geiger-Maitreya counter tube and is used as a gas ionization detector working in a Geiger-Maitreya region, and the G-M counter tube has the advantages of large output signal amplitude, high signal-to-noise ratio, independence of output amplitude and incident ion capacity, high sensitivity, strong stability, small volume and the like.
Drawings
FIG. 1 is a schematic block diagram of a dual count tube sampling circuit in this embodiment;
FIG. 2 is a schematic diagram of a circuit between a dual count tube and a voltage supply sampling module in this embodiment;
fig. 3 is a schematic structural diagram of the single chip microcomputer in the present embodiment.
Detailed Description
Referring to fig. 1, a dual-counting tube sampling circuit includes a low-range counting tube, a high-range counting tube, a single chip, a power supply, and a voltage supply sampling integrated module integrated with a dual-path high-voltage power supply circuit and a dual-path sampling circuit; the voltage supply sampling integrated module can boost the power supply voltage and then provide the boosted power supply voltage for the low-range counting tube and the high-range counting tube; the low-range counting tube is connected with a first power supply loop of the voltage supply sampling integrated module through a switch circuit, and the switch circuit is switched on and off by receiving a control signal of the singlechip; the high-range counting tube is directly connected to a second power supply loop of the voltage supply sampling integrated module; pulse signals output by the low-range counting tube and the high-range counting tube are converted into square wave signals through the pressure supply sampling integrated module and are sent to the single chip microcomputer.
The measuring range of the low-range counting tube is partially overlapped with that of the high-range counting tube, so that after the low-range counting tube is turned off, the high-range counting tube can still be used for measuring the partial small-measurement radiation metering rate. This is independent of how to control the turn-off of the low-range counting tube, and belongs to the inherent characteristics of the circuit.
In order to protect the low-range counting tube, the value in the overlapping area of the measuring ranges of the two counting tubes is used as a threshold value; the single chip microcomputer generates a control signal for controlling the switch circuit by comparing the threshold value with the real-time measurement value corresponding to the low-range counting tube or the high-range counting tube. The single chip microcomputer is controlled to be turned off through a threshold value, the method belongs to the conventional technical means, the improvement on the method is not involved, and the innovation point is the threshold value.
Referring to fig. 2, the pressure supply and sampling integrated module D2 is model number STD43T, and the low range counter tube VE1 and the high range counter tube VE2 are both G-M counter tubes. And an anode J405 and a cathode J405-of the high-range counting tube VE2 are respectively connected with J2 and J2-of the voltage supply sampling integrated module D2 to form a second power supply loop. J1+ and J1-of the voltage supply and sampling integrated module D2 are respectively connected with the anode J6401+ and the cathode J6401-of the low-range counting tube VE1, and a contact switch of the electromagnetic relay K1 is connected between the cathode J6401-of the low-range counting tube VE1 and the J1-of the voltage supply and sampling integrated module D2 to form a first power supply loop.
One end of an electromagnet of the electromagnetic relay K1 is connected with a power supply, and the other end of the electromagnet is grounded through a triode Q1; the collector of the triode Q1 is connected with the electromagnet, the emitter of the triode is grounded, and the base of the triode is connected with the singlechip through the current-limiting resistor R2; the triode receives a control signal of the singlechip to conduct or shut off, so that the electromagnet is electrified or powered off to change the attraction state between the electromagnet and the contact switch, and the on-off of the first power supply loop is switched. The power supply is connected with the collector of the triode through a clamping diode V1, the cathode of the clamping diode V1 is connected with the power supply, and the anode of the clamping diode V1 is connected with the collector of the triode Q1.
Referring to fig. 2 and 3, the SO1 pin and the SO2 of the voltage supply and sampling integration module D2 are connected to pins 6 and 7 of the single chip, a capacitor C1 is connected between the RESET pin of the single chip and the ground GND, and a resistor R1 is connected between the pin 22 of the single chip and the VCC.
Claims (8)
1. The utility model provides a two count tube sampling circuit, includes a low-range count tube, a high-range count tube, a singlechip and power, its characterized in that: the voltage supply and sampling integrated module is integrated with a double-circuit high-voltage power supply circuit and a double-circuit sampling circuit; the voltage supply sampling integrated module can boost the power supply voltage and then provide the boosted power supply voltage for the low-range counting tube and the high-range counting tube; the low-range counting tube is connected with a first power supply loop of the voltage supply sampling integrated module through a switch circuit, and the switch circuit is switched on and off by receiving a control signal of the singlechip; the high-range counting tube is directly connected to a second power supply loop of the voltage supply sampling integrated module; pulse signals output by the low-range counting tube and the high-range counting tube are converted into square wave signals through the pressure supply sampling integrated module and are sent to the single chip microcomputer.
2. The dual count tube sampling circuit of claim 1, wherein: the measuring range of the low-range counting tube is partially overlapped with the measuring range of the high-range counting tube.
3. The dual count tube sampling circuit of claim 1, wherein: the measuring range of the low-range counting tube is partially overlapped with the measuring range of the high-range counting tube, and the value in the overlapping area is used as a threshold value; the single chip microcomputer generates a control signal for controlling the switch circuit by comparing the threshold value with the real-time measurement value corresponding to the low-range counting tube or the high-range counting tube.
4. The dual count tube sampling circuit of claim 1, wherein: the switch circuit comprises an electromagnetic relay and a triode, and a contact switch of the electromagnetic relay is connected in series to a first power supply loop of the voltage supply sampling integrated module; one end of an electromagnet of the electromagnetic relay is connected with a power supply, and the other end of the electromagnet is grounded through a triode; the collector of the triode is connected with the electromagnet, the emitter of the triode is grounded, and the base of the triode is connected with the singlechip; the triode receives a control signal of the singlechip to conduct or shut off, so that the electromagnet is electrified or powered off to change the attraction state between the electromagnet and the contact switch, and the on-off of the first power supply loop is switched.
5. The dual count tube sampling circuit of claim 3, wherein: the single chip microcomputer is connected with the base electrode of the triode through the current limiting resistor.
6. The dual count tube sampling circuit of claim 3, wherein: the power supply is connected with the collector of the triode through a clamping diode, the cathode end of the clamping diode is connected with the power supply, and the anode end of the clamping diode is connected with the collector of the triode.
7. The dual count tube sampling circuit of claim 1, wherein: the low-range counting tube and the high-range counting tube are G-M counting tubes.
8. The dual count tube sampling circuit of claim 1, wherein: the model number of the pressure sampling integrated module is STD 43T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020638806.4U CN211905708U (en) | 2020-04-24 | 2020-04-24 | Double-counting-tube sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020638806.4U CN211905708U (en) | 2020-04-24 | 2020-04-24 | Double-counting-tube sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211905708U true CN211905708U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020638806.4U Active CN211905708U (en) | 2020-04-24 | 2020-04-24 | Double-counting-tube sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211905708U (en) |
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2020
- 2020-04-24 CN CN202020638806.4U patent/CN211905708U/en active Active
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