阅读说明：本技术 稳定型冻土厚度监测装置 (Stable type thickness of frozen earth layer monitoring device ) 是由 王明玉 于 2018-05-21 设计创作，主要内容包括：本发明公开了稳定型冻土厚度监测装置,包括冻土厚度监测电极、监测辅助电极、电流和电压采样电路、主控系统和测量电源；所述监测辅助电极包括电流辅助电极和2根电压辅助电极,所述电压辅助电极包括第一电压辅助电极和第二电压辅助电极；所述电流辅助电极通过测量电源与电流和电压采样电路的电流通道相连,所述电压辅助电极连接在电流和电压采样电路的电压通道上；所述冻土厚度监测电极成绝缘结构且外套设有多个金属电极,所述金属电极上设置有与主控系统相连的引线；所述电流和电压采样电路连接在主控系统上；所述测量电源上连接有浪涌泄放电路。其可靠性高。(The invention discloses stable type thickness of frozen earth layer monitoring devices, including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode, electric current and voltage sampling circuit, master control system and measurement power supply；The monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, and the voltage auxiliary electrode includes first voltage auxiliary electrode and second voltage auxiliary electrode；The electric current auxiliary electrode is connected by measuring power supply with the current channel of electric current and voltage sampling circuit, and the voltage auxiliary electrode is connected on the voltage channel of electric current and voltage sampling circuit；Thickness of frozen earth layer monitoring electrode is arranged with multiple metal electrodes at insulation system and outside, and the lead being connected with master control system is provided on the metal electrode；The electric current and voltage sampling circuit are connected in master control system；Surge circuit is connected on the measurement power supply.Its reliability is high.)

1. stable type thickness of frozen earth layer monitoring device, which is characterized in that including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode, electricity Stream and voltage sampling circuit, master control system and measurement power supply；Wherein:

The monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, and the voltage auxiliary electrode includes the One voltage auxiliary electrode and second voltage auxiliary electrode；

The electric current auxiliary electrode is connected by measuring power supply with the current channel of electric current and voltage sampling circuit, and the voltage is auxiliary Electrode is helped to be connected on the voltage channel of electric current and voltage sampling circuit；

Thickness of frozen earth layer monitoring electrode is arranged with multiple metal electrodes at insulation system and outside, is provided on the metal electrode The lead being connected with master control system；

The electric current and voltage sampling circuit are connected in master control system；

Surge circuit is connected on the measurement power supply；

The measurement power supply includes the first power module and second power supply module, first power module, second power supply module It is connected respectively by first voltage detection circuit, second voltage detection circuit with control circuit, the control circuit is according to first Voltage detecting circuit, second voltage detection circuit voltage value control the on-off of first switch circuit, second switch circuit respectively, First power module, second power supply module pass through first switch circuit respectively, second switch circuit is connected with monitoring modular.

2. stable type thickness of frozen earth layer monitoring device according to claim 1, which is characterized in that the surge circuit packet Include the first field-effect tube, the second field-effect tube, first resistor, second resistance and diode, the grid of first field-effect tube It is both connected on power supply with the cathode of drain electrode, diode, the grid of second field-effect tube and the anode of source electrode, diode are equal Ground connection, the source electrode of first field-effect tube passes sequentially through first resistor, second resistance is connected with the drain electrode of the second field-effect tube, The first resistor, second resistance connecting pin be connected on power module outlet.

3. stable type thickness of frozen earth layer monitoring device according to claim 2, which is characterized in that first field-effect tube is P-channel field-effect transistor (PEFT) pipe, second field-effect tube are N-channel field-effect tube.

4. stable type thickness of frozen earth layer monitoring device according to claim 2, which is characterized in that the first resistor, second The Standard resistance range of resistance is 100 ohm to 200 ohm.

Technical field

The present invention relates to power ground systematic survey fields, and in particular to stable type thickness of frozen earth layer monitoring device.

Background technique

Since variation of ambient temperature is big, the region upper layer of soil is caused to there is seasonal freezeout, on upper layer after freezing High soil resistivity layer is formed in soil, and compared with non-freezing situation, the soil resistivity of this layer is in different season phases Difference ten to hundreds times, to cause ground network ground resistance very big in different calendar variations.The main indicator of earth mat safety For ground resistance, step voltage, contact voltage, soil freezing will cause ground resistance to rise, and ground resistance increase will cause ground Net current potential rises, and increases so as to cause step voltage and contact voltage, jeopardizes personnel and equipment safety.Therefore, monitoring is seasonal The frozen soil layer thickness of Frozen Ground Area has very important meaning to ensuring substation operation safely.

The monitoring of frost zone thickness belongs to the scope of overvoltage protection and ground connection.The type monitoring there is no to set at present It is standby.

Summary of the invention

In order to solve the above-mentioned technical problem the present invention provides stable type thickness of frozen earth layer monitoring device.

The present invention is achieved through the following technical solutions:

Stable type thickness of frozen earth layer monitoring device, including thickness of frozen earth layer monitoring electrode, monitoring auxiliary electrode, electric current and voltage are adopted Sample circuit, master control system and measurement power supply；Wherein:

The monitoring auxiliary electrode includes electric current auxiliary electrode and 2 voltage auxiliary electrodes, the voltage auxiliary electrode packet Include first voltage auxiliary electrode and second voltage auxiliary electrode；

The electric current auxiliary electrode is connected by measuring power supply with the current channel of electric current and voltage sampling circuit, the electricity Pressure auxiliary electrode is connected on the voltage channel of electric current and voltage sampling circuit；

Thickness of frozen earth layer monitoring electrode is arranged with multiple metal electrodes at insulation system and outside, sets on the metal electrode It is equipped with the lead being connected with master control system；

The electric current and voltage sampling circuit are connected in master control system；

Surge circuit is connected on the measurement power supply；

The measurement power supply includes the first power module and second power supply module, first power module, second source Module passes through first voltage detection circuit respectively, second voltage detection circuit is connected with control circuit, the control circuit according to First voltage detection circuit, second voltage detection circuit voltage value control first switch circuit, second switch circuit respectively On-off, first power module, second power supply module pass through first switch circuit, second switch circuit and monitoring modular respectively It is connected.

The surge circuit includes the first field-effect tube, the second field-effect tube, first resistor, second resistance and two poles Pipe, the grid of first field-effect tube and the cathode of drain electrode, diode are both connected on power supply, second field-effect tube The anode of grid and source electrode, diode is grounded, and the source electrode of first field-effect tube passes sequentially through first resistor, second resistance Be connected with the drain electrode of the second field-effect tube, the first resistor, second resistance connecting pin be connected on power module outlet.

First field-effect tube is P-channel field-effect transistor (PEFT) pipe, and second field-effect tube is N-channel field-effect tube.

The first resistor, second resistance Standard resistance range be 100 ohm to 200 ohm.

Compared with prior art, the present invention having the following advantages and benefits:

1, the present invention is by measurement earth's surface voltage, and when measuring electric current pole is more than frozen soil layer thickness, earth's surface voltage will Mutation being generated, by detecting this mutation, it can be determined that the profound degree of current flow is located at the interface of frozen soil layer and non-frozen soil layer, from And the thickness of Seasonal analysis is calculated.

2, it is connected with surge circuit on the measurement power supply of this equipment, improves the reliability of device measuring.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment, the present invention is made Further to be described in detail, exemplary embodiment of the invention and its explanation for explaining only the invention, are not intended as to this The restriction of invention.