Halogen tube probe

Abstract

The utility model relates to the technical field of ray detection equipment, and discloses a halogen tube probe which comprises a halogen tube, the halogen tube is connected with a first divider resistor and a second divider resistor, and the first divider resistor and the second divider resistor are connected in series and then are connected with the ground. One end, connected with the second divider resistor, of the first divider resistor is connected with a host; the signal interference is effectively avoided, the circuit is simplified, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ray detection equipment, in particular to a halogen tube probe. Background Art

[0002] In the material level detection of the silo, it is necessary to emit gamma rays through the emission source, and judge the material level of the silo (full, empty, or half-full) according to the signal strength received by the halogen tube. Some halogen tube receiving ends need to transmit the signal to the operational amplifier module for processing after receiving the pulse signal of the ray strength through the halogen tube, and then transmit it to the subsequent circuit for processing. However, the role played by the operational amplifier module is small, and the operating voltage of the operational amplifier module is 12V. The subsequent circuit needs to perform voltage conversion to power the operational amplifier driver module, which will interfere with the signal, complicate the circuit structure, and increase the circuit cost. Utility Model Content

[0003] The purpose of the utility model is to provide a halogen tube probe which can effectively avoid signal interference, simplify circuits and reduce costs.

[0004] The utility model is achieved in this way:

[0005] A halogen tube probe includes a halogen tube, wherein the halogen tube is connected to a first voltage-dividing resistor and a second voltage-dividing resistor, wherein the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series and then connected to the ground, and one end of the first voltage-dividing resistor and the second voltage-dividing resistor is connected to a host.

[0006] Furthermore, the host includes a pulse signal conversion module connected to the first voltage divider resistor, the output end of the pulse signal conversion module is connected to the analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected to the microprocessor, and the pulse signal conversion module, analog-to-digital conversion module and microprocessor are all connected to the power supply voltage stabilization module.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] In practical applications, the 390V power supply voltage is used to power the halogen tube, and the power supply is not shared with the host. After the halogen tube receives the pulse signal, the voltage is divided by the first voltage-dividing resistor and the second voltage-dividing resistor and then transmitted to the host for further signal processing, eliminating the need for the intermediate operational amplifier module to process the signal. The power supply of the host does not need to be stabilized and converted before being sent to the probe, thus avoiding signal interference, simplifying the circuit and reducing costs. The utility model effectively avoids signal interference, simplifies the circuit and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 This is a schematic diagram of the circuit structure of an existing halogen tube probe;

[0011] Figure 2 It is a schematic diagram of the circuit structure of the utility model; DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] See also Figure 2 A halogen tube probe includes a halogen tube, the halogen tube is connected to a first voltage-dividing resistor and a second voltage-dividing resistor, the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series and then connected to the ground, and one end of the first voltage-dividing resistor and the second voltage-dividing resistor is connected to the host.

[0014] In practical applications, the 390V power supply voltage is used to power the halogen tube, and the power supply is not shared with the host. After the halogen tube receives the pulse signal, the voltage is divided by the first voltage-dividing resistor and the second voltage-dividing resistor and then transmitted to the host for further signal processing, eliminating the need for the intermediate operational amplifier module to process the signal. The power supply of the host does not need to be stabilized and converted before being sent to the probe, thus avoiding signal interference, simplifying the circuit and reducing costs. The utility model effectively avoids signal interference, simplifies the circuit and reduces costs.

[0015] In the prior art, there is an op amp between the halogen tube and the host. This op amp is used to amplify the signal to overcome the attenuation of the signal in the cable, and a small board for installing the op amp needs to be installed at the probe end. However, the cable from the halogen tube to the host has a resistance of less than 10 ohms. Compared with the 6G ohm resistance of the halogen tube, the resistance of the cable from the halogen tube to the host is negligible, so the impact is minimal. Therefore, the op amp between the halogen tube and the host has a minimal effect, and canceling the op amp has no effect on signal transmission. In addition, a small board for installing the op amp needs to be installed at the halogen tube, which increases the complexity of the circuit structure. Since the op amp is installed at the probe end and the driving voltage of the op amp is 12V, it cannot share the power supply with the halogen tube. The host end needs to send a 12V power supply to the op amp at the probe end, which increases the complexity of the circuit structure. Therefore, canceling the op amp can effectively simplify the circuit structure while avoiding interference of the external voltage signal on the signal of the halogen tube.

[0016] See also Figure 2 The host includes a pulse signal conversion module connected to a first voltage-dividing resistor, an output end of the pulse signal conversion module is connected to an analog-to-digital conversion module, an output end of the analog-to-digital conversion module is connected to a microprocessor, and the pulse signal conversion module, the analog-to-digital conversion module, and the microprocessor are all connected to a power supply voltage regulator module. In this embodiment, the signal after voltage division by the first and second voltage-dividing resistors is transmitted to the pulse signal conversion module, and after comparison and conversion by the pulse signal conversion module, it is output to the analog-to-digital conversion module. The analog-to-digital conversion module performs analog-to-digital conversion on the signal and transmits it to the microprocessor for processing. The power supply voltage regulator module supplies power to the pulse signal conversion module, the analog-to-digital conversion module, and the microprocessor respectively.

[0017] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A halogen tube probe, characterized in that: It includes a halogen tube, which is connected to a first voltage-dividing resistor and a second voltage-dividing resistor. The first voltage-dividing resistor and the second voltage-dividing resistor are connected in series and then connected to the ground. One end of the first voltage-dividing resistor and the second voltage-dividing resistor is connected to the host.

2. A halogen tube probe according to claim 1, characterized in that: The host includes a pulse signal conversion module connected to a first voltage-dividing resistor, the output end of the pulse signal conversion module is connected to an analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected to a microprocessor, and the pulse signal conversion module, the analog-to-digital conversion module and the microprocessor are all connected to a power supply voltage stabilization module.

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