Abstract: A bark stopping method and a bark stopping device, which relate to the technical field of pet equipment. A sound collecting module, a distance detecting module and a sound wave emitting module are adopted as components for sound collection, distance detection and driving sound emission; after acquiring a first environmental sound and identifying a dog barking sound, a type of a barking dog is identified, a frequency of a barking sound wave is identified, and then a first driving sound wave with the same frequency is generated; after acquiring a first distance, if the first distance is less than a preset distance, the first driving sound wave is emitted towards the barking dog, and after acquiring a current second environmental sound, if no barking sound exists in the second environmental sound, and the emission of the first driving sound wave is stopped.

Abstract: A bark stopping method and a bark stopping device, which relate to the technical field of pet equipment. A sound collecting module, a distance detecting module and a sound wave emitting module are adopted as components for sound collection, distance detection and driving sound emission; after acquiring a first environmental sound and identifying a dog barking sound, a type of a barking dog is identified, a frequency of a barking sound wave is identified, and then a first driving sound wave with the same frequency is generated; after acquiring a first distance, if the first distance is less than a preset distance, the first driving sound wave is emitted towards the barking dog, and after acquiring a current second environmental sound, if no barking sound exists in the second environmental sound, and the emission of the first driving sound wave is stopped.

Abstract: A thermistor material composed of Ca1-xYbxCeNbWO8(0?x?0.2) can be used in a wide temperature range from 25 to 800° C. It is made from high-pure CaCO3, CeO2, NbO5, WO3 and Yb2O3. These ceramic materials with a scheelite structure can be obtained after mixing, grinding, calcination, pressing, cold isostatic pressing and high-temperature sintering, etc. The values of material constant B300° C./600° C. and ?25° C. of thermistor materials are in the range of 6465K-6732K, 4.06×107?.cm-8.63×107?.cm. The thermistor material has a good thermostability and significant negative temperature coefficient (NTC) characteristic in the temperature range of 25° C. to 800° C., could be used as a potential for fabricating high-temperature thermistor sensors.

Abstract: An object of the present disclosure is to provide the preparation and application of a low-B high-resistance high-temperature thermistor material with wide temperature range. The thermistor material uses CaCO3, Y2O3, Nb2O5, CeO2 and MoO3 as raw materials. The Ca1-yYyMoO4-xCeNbO4 (1?x?3, 0.01?y?0.2) high-temperature thermistor material having low-B high-resistance and wide temperature region is obtained by mixing grinding, calcination, cold isostatic pressing, high-temperature sintering and coating electrode. The material constant B200° C./600° C. is 1800 K-4000 K, and the resistivity at 25° C. is 8.0×105 ?·cm-6.0×107 ?·cm. The low-B high-resistance wide temperature range high-temperature thermistor material prepared by the disclosure has stable performance and good consistency. The thermistor material has obvious negative temperature coefficient characteristics in the range of 25° C.-1000° C. and is suitable for manufacturing wide temperature range high-temperature thermistor.

Abstract: A composite thermistor material, a preparation method and an application thereof. The perovskite structure oxide and the pyrochlorite structure oxide are composite by solid state reaction method, which comprise process of ball milling, drying, and calcining. Then the thermistor ceramics with high temperature resistance and controllable B value are sintered at high temperature after mould forming, then the thermistor disks are coated by platinum paste, and then the platinum wire is welded as the lead wire to form thermistor element. The thermistor of the invention can realize temperature measurement from room temperature to 1000° C. and has good negative temperature coefficient thermistor characteristics. The thermistor coefficient B can be adjusted by changing the two-phase ratio to meet the requirements of different systems.

Abstract: A composite thermistor material, a preparation method and an application thereof. The perovskite structure oxide and the pyrochlorite structure oxide are composite by solid state reaction method, which comprise process of ball milling, drying, and calcining. Then the thermistor ceramics with high temperature resistance and controllable B value are sintered at high temperature after mould forming, then the thermistor disks are coated by platinum paste, and then the platinum wire is welded as the lead wire to form thermistor element. The thermistor of the invention can realize temperature measurement from room temperature to 1000° C. and has good negative temperature coefficient thermistor characteristics. The thermistor coefficient B can be adjusted by changing the two-phase ratio to meet the requirements of different systems.